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Master Your Machines: A Deep Dive into P.S. Bimbhra’s Electrical Machinery

If you are an electrical engineering student or a professional preparing for competitive exams like , chances are you have heard of Dr. P.S. Bimbhra. His book, Electrical Machinery , is often hailed as the "bible" of the subject.

Whether you are looking for a PDF to supplement your study sessions or considering buying the physical copy for your bookshelf, here is why this book remains a top choice in the technical world. Why Every Electrical Engineer Needs This Book

The core strength of P.S. Bimbhra’s work is its ability to bridge the gap between abstract theory and practical application. Electrical Machinery PS Bimbhra | PDF - Scribd

Book Information:

• Title: Electrical Machinery
• Author: P.S. Bimbhra
• Subject: Electrical Engineering

Book Overview:

"Electrical Machinery" by P.S. Bimbhra is a popular textbook in the field of electrical engineering. The book covers the fundamental concepts and principles of electrical machinery, including the design, operation, and application of various types of electrical machines.

Topics Covered:

The book covers a wide range of topics, including:

• DC machines
• AC machines
• Transformers
• Induction machines
• Synchronous machines
• Electric machine design
• Electromagnetic fields

PDF Availability:

As for the PDF version, I couldn't find a direct link to download the book. However, I can suggest some possible sources where you may be able to find the PDF:

• Online libraries: You can try searching online libraries such as Google Books, ResearchGate, or Academia.edu to see if the book is available for download or preview.
• Educational websites: Some educational websites, such as Electrical Engineering Portal or Engineering Study Material, may have a copy of the book available for download.
• eBook stores: You can also try searching eBook stores like Amazon or Google Play Books to see if the book is available for purchase or download.

Alternative Resources:

If you're unable to find the PDF version, you can consider the following alternative resources:

• Check your local library or university library to see if they have a copy of the book.
• Look for other textbooks on electrical machinery, such as "Electric Machinery" by Fitzgerald or "Electrical Machines" by Slemon.
• Online courses or tutorials on electrical engineering may also cover the topics discussed in the book.

Electrical Machinery P.S. Bimbhra PDF: A Comprehensive Guide to Electrical Machines

Electrical machinery is a fundamental subject in the field of electrical engineering, dealing with the study, design, and application of electrical machines. These machines are a crucial part of modern industry, transportation, and power systems, converting electrical energy into mechanical energy or vice versa. One of the most popular and widely used textbooks on electrical machinery is written by P.S. Bimbhra, a renowned expert in the field. The book, available in PDF format, has become a go-to resource for students, engineers, and researchers seeking in-depth knowledge of electrical machines.

Introduction to Electrical Machinery

Electrical machinery encompasses a broad range of machines, including DC machines, AC machines, induction machines, synchronous machines, and more. These machines are used in various applications, such as power generation, transmission, and distribution, as well as in industrial drives, robotics, and automation. The study of electrical machinery involves understanding the principles of electromagnetic induction, motor action, and the behavior of electrical machines under different operating conditions.

P.S. Bimbhra's Electrical Machinery Book

P.S. Bimbhra's book on electrical machinery is a comprehensive textbook that covers the fundamental concepts, design, and application of electrical machines. The book is widely used in universities and colleges as a primary textbook for undergraduate and postgraduate students of electrical engineering. The PDF version of the book is easily accessible, making it a popular choice among students and professionals.

Key Features of the Book

The book on electrical machinery by P.S. Bimbhra is known for its clear and concise presentation, making complex topics easy to understand. Some of the key features of the book include:

1. In-depth coverage of electrical machines: The book provides a thorough analysis of various types of electrical machines, including DC machines, AC machines, induction machines, synchronous machines, and more.
2. Design and application: The book covers the design and application of electrical machines, including the selection of machines for specific applications.
3. Performance analysis: The book provides detailed performance analysis of electrical machines, including efficiency, power factor, and torque calculations.
4. Solved examples and problems: The book includes numerous solved examples and problems, helping students to understand and practice the concepts.

Topics Covered in the Book

The book on electrical machinery by P.S. Bimbhra covers a wide range of topics, including:

1. Introduction to electrical machines: Fundamental concepts, types of electrical machines, and their applications.
2. DC machines: Construction, working principle, types, and applications of DC machines.
3. AC machines: Construction, working principle, types, and applications of AC machines.
4. Induction machines: Construction, working principle, types, and applications of induction machines.
5. Synchronous machines: Construction, working principle, types, and applications of synchronous machines.
6. Transformers: Construction, working principle, types, and applications of transformers.

Benefits of Using the Book

The book on electrical machinery by P.S. Bimbhra is a valuable resource for students, engineers, and researchers. Some of the benefits of using the book include:

1. Comprehensive coverage: The book provides a comprehensive coverage of electrical machines, making it a one-stop resource for those seeking knowledge in this field.
2. Clear and concise presentation: The book is written in a clear and concise manner, making complex topics easy to understand.
3. Practical approach: The book provides a practical approach to the study of electrical machines, including design, application, and performance analysis.

Downloading the PDF

The PDF version of the book on electrical machinery by P.S. Bimbhra is widely available online. However, it is essential to ensure that the PDF is downloaded from a reputable source to avoid any copyright or piracy issues. Some popular online platforms where the book can be found include:

1. Google Books: Google Books provides a preview of the book, and users can also download the PDF version.
2. Amazon: Amazon offers the book in Kindle format, and users can also download the PDF version.
3. Online libraries: Many online libraries, such as Academia.edu and ResearchGate, provide access to the PDF version of the book.

Conclusion

In conclusion, the book on electrical machinery by P.S. Bimbhra is a comprehensive textbook that provides in-depth knowledge of electrical machines. The PDF version of the book is widely available online, making it a popular choice among students, engineers, and researchers. The book covers a wide range of topics, including DC machines, AC machines, induction machines, synchronous machines, and transformers. Its clear and concise presentation, practical approach, and comprehensive coverage make it an essential resource for those seeking knowledge in the field of electrical machinery.

Recommendations

Based on the content and features of the book, it is recommended for:

1. Undergraduate and postgraduate students: The book is suitable for undergraduate and postgraduate students of electrical engineering, seeking to gain a comprehensive understanding of electrical machines.
2. Electrical engineers: The book is a valuable resource for electrical engineers, providing practical knowledge of electrical machines and their applications.
3. Researchers: The book is a useful resource for researchers, providing a comprehensive coverage of electrical machines and their performance analysis.

Future Scope

The study of electrical machinery is an ever-evolving field, with ongoing research and development in areas such as:

1. Renewable energy systems: Electrical machines play a crucial role in renewable energy systems, such as wind and hydro power.
2. Electric vehicles: Electrical machines are used in electric vehicles, providing efficient and reliable propulsion.
3. Industrial automation: Electrical machines are used in industrial automation, providing precise control and efficient operation.

In conclusion, the book on electrical machinery by P.S. Bimbhra is a comprehensive textbook that provides in-depth knowledge of electrical machines. Its clear and concise presentation, practical approach, and comprehensive coverage make it an essential resource for those seeking knowledge in the field of electrical machinery.

A Comprehensive Review of "Electrical Machinery" by P.S. Bimbhra

The book "Electrical Machinery" by P.S. Bimbhra is a highly acclaimed textbook in the field of electrical engineering, specifically focusing on electrical machinery. As a vital resource for undergraduate and postgraduate students, this book provides an in-depth analysis of the fundamental principles and applications of electrical machines. In this review, we will discuss the key features, strengths, and weaknesses of the book, as well as its suitability for various audiences. electrical machinery p.s. bimbhra pdf

Overall Impression

The book "Electrical Machinery" by P.S. Bimbhra is an exhaustive and well-structured textbook that covers a wide range of topics related to electrical machinery. The author, P.S. Bimbhra, is a renowned expert in the field, and his expertise reflects in the clarity and depth of the content. The book is well-organized, and the language is lucid, making it easy to understand complex concepts.

Key Features

1. Comprehensive Coverage: The book covers all types of electrical machines, including DC machines, transformers, synchronous machines, induction machines, and special machines.
2. Theoretical Background: The book provides a thorough theoretical background for each type of machine, explaining the fundamental principles, construction, and working of each machine.
3. Performance Analysis: The book includes detailed performance analysis of each machine, including efficiency, power factor, and torque calculations.
4. Applications: The book discusses various applications of electrical machines, including industrial drives, power generation, and distribution.
5. Solved Examples: The book contains numerous solved examples, which help students to understand and apply the concepts.
6. Review Questions: The book includes a large number of review questions, which enable students to assess their understanding of the subject.

Strengths

1. Clear and Concise Language: The language used in the book is clear, concise, and easy to understand, making it accessible to students with varying levels of knowledge.
2. In-Depth Analysis: The book provides an in-depth analysis of each topic, covering both the theoretical and practical aspects of electrical machinery.
3. Wide Coverage: The book covers a wide range of topics, making it a comprehensive resource for students and professionals alike.
4. Large Number of Solved Examples: The book contains a large number of solved examples, which help students to understand and apply the concepts.

Weaknesses

1. Lack of Modern Topics: The book primarily focuses on traditional topics and does not cover modern topics, such as renewable energy systems and power electronics applications.
2. No MATLAB/Simulink Examples: The book does not include MATLAB/Simulink examples, which are essential for simulating and analyzing electrical machines.

Suitability

The book "Electrical Machinery" by P.S. Bimbhra is suitable for:

1. Undergraduate Students: The book is an excellent resource for undergraduate students pursuing electrical engineering, as it provides a comprehensive introduction to electrical machinery.
2. Postgraduate Students: The book is also suitable for postgraduate students, as it provides an in-depth analysis of electrical machines and their applications.
3. Professionals: The book is a valuable resource for professionals working in the field of electrical engineering, as it provides a thorough understanding of electrical machines and their applications.

Conclusion

In conclusion, "Electrical Machinery" by P.S. Bimbhra is a highly recommended textbook for students and professionals in the field of electrical engineering. The book provides a comprehensive and in-depth analysis of electrical machines, covering both theoretical and practical aspects. While the book has some limitations, such as the lack of modern topics and MATLAB/Simulink examples, it remains an excellent resource for anyone seeking to understand electrical machinery.

Rating: 4.5/5

Recommendation: I highly recommend "Electrical Machinery" by P.S. Bimbhra to undergraduate and postgraduate students, as well as professionals working in the field of electrical engineering. The book is an excellent resource for anyone seeking to understand electrical machines and their applications.

P.S. Bimbhra’s Electrical Machinery is widely considered a foundational text for electrical engineering students, especially for competitive exam preparation like GATE and IES. It provides a deep dive into the physical intuition and mathematical proofs behind how machines operate. Key Topics Covered

The book is structured to build from basic principles to complex rotating machines: Generalized Theory Of Electrical Machines By Ps Bimbhra

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Why Students Hunt for the PDF (Beyond Cost)

The search for the "Electrical Machinery P.S. Bimbhra PDF" is driven by three primary factors:

1. Accessibility: The physical book is heavy (often referred to as the "brick"). A PDF allows students to carry it on their phones or laptops to the library or workshop.
2. Searchability: When preparing for an exam at 2 AM, Ctrl+F to find "Armature Reaction" is faster than flipping 600 pages.
3. The "Solved Example" Phenomenon: Bimbhra’s book contains hundreds of solved examples. Students often need to re-solve these examples multiple times, and a digital copy allows for infinite printing of specific practice pages.

3. The "Bimbhra Style" of Phasor Diagrams

In electrical engineering, drawing a phasor diagram incorrectly can cost you an entire exam question. Bimbhra’s methodical approach to drawing phasor diagrams for transformer loading, armature reaction, and synchronous motors is arguably the best in any textbook.

1. Comprehensive Coverage of the Syllabus

The book is structured into logical sections that cover 90% of a standard undergraduate electrical machines course:

• Transformers: From single-phase to three-phase connections, including auto-transformers and parallel operation.
• DC Machines: Generators and motors, characteristics, starting, speed control, and testing (Swinburne’s, Hopkinson’s).
• Synchronous Machines: Salient and non-salient pole alternators, voltage regulation (MMF, EMF, Potier methods), synchronizing, and hunting.
• Induction Motors: Three-phase and single-phase, circle diagrams, starting methods, and speed control.
• Special Machines: Brief introduction to stepper motors, universal motors, and servomotors.

3. Induction Motors (The Complexity)

The chapter on the Circle Diagram is arguably the best part of the book. Bimbhra walks the student through the construction of the circle diagram from no-load and blocked-rotor test data without skipping a single calculation step. For the PDF user, having a digital zoom on these diagrams is a massive advantage.

Short overview — Electrical Machinery (P.S. Bimbhra)

Electrical Machinery by P.S. Bimbhra is a widely used textbook for undergraduate electrical engineering courses covering electromechanical energy conversion, transformers, synchronous machines, and induction motors. A concise piece:

• Author & scope: P.S. Bimbhra authored a clear, example-driven book focused on fundamentals and practical applications of electrical machines: magnetic circuits, transformers, DC machines, synchronous generators and motors, induction motors, special machines, and basic power electronics interfaces.

• Key topics:

  • Magnetic circuits and flux concepts
  • Transformer theory, equivalent circuits, on‑load/off‑load behavior, per‑unit system
  • DC machine construction, characteristics, armature reaction, commutation, starters
  • Synchronous machine operation, phasor diagrams, V–curves, stability and synchronizing power
  • Induction motor theory, torque‑slip characteristics, starting methods, test procedures
  • Single‑phase machines and special types (e.g., stepper, brushless DC)
  • Speed control methods and basic drives

• Style & strengths: Pedagogical, with worked examples, solved problems, numerical exercises and clear diagrams — suitable for students preparing for exams and engineers needing reference material.

• Use cases: Course textbook, exam prep, design reference for lab work, understanding machine tests (open‑circuit, short‑circuit, direct and indirect methods), and troubleshooting rotating equipment.

• Copyright & access note: The book is commercially published; look for legitimate copies through libraries, academic bookstores, or authorized vendors. Avoid unauthorized PDFs.

If you want, I can:

1. Provide a detailed chapter‑by‑chapter summary.
2. Create a study plan with practice problems based on the book.
3. Summarize key formulas and test procedures into a one‑page cheat sheet.

Which would you like?

(Invoking related search suggestions...)

Review: Electrical Machinery by Dr. P.S. Bimbhra Electrical Machinery by Dr. P.S. Bimbhra

is widely considered the "gold standard" for undergraduate students and competitive exam aspirants in India, particularly for those preparing for GATE and Engineering Services Examination (ESE). Why This Book is a Must-Read

Comprehensive Coverage: The book meticulously covers fundamental concepts of transformers and all types of rotating electrical machines.

Balance of Rigor and Clarity: Dr. Bimbhra uses clear, concise language that avoids unnecessary jargon, making complex topics accessible for both self-learners and classroom students.

Problem-Solving Focus: It is famous for its step-by-step explanations in problem-solving sections, which help readers master complex calculations and design methodologies.

Generalized Theory: One of its standout features is the introduction to the Generalized Theory of Electrical Machines, which provides a unified mathematical model for analyzing different machine types using two-axis theory. Key Topics Covered

Transformers: Construction, principle of action, phasor diagrams, and efficiency. DC Machines: Detailed analysis of motors and generators.

Synchronous Machines: Covering alternators and synchronous motors.

Induction Motors: Comprehensive theory and performance metrics. Master Your Machines: A Deep Dive into P

Generalized Machine Theory: A unified approach to machine analysis. Where to Find the PDF and Resources

While the physical book is published by Khanna Publishers, several academic platforms host digital previews or full versions: Electrical Machinery PS Bimbhra | PDF - Scribd

Electrical Machinery Dr. P.S. Bimbhra , published by Khanna Publishers

, is a cornerstone textbook for undergraduate electrical engineering students, particularly those following the AICTE model curriculum

. It is widely recognized for its rigorous treatment of transformers and rotating electrical machines, balancing deep theoretical underpinnings with practical applications. Google Books Core Content & Topics Covered

The text provides a comprehensive look at the fundamental principles governing all electrical machinery: Amazon.com Electrical Machinery [7th ed.] 9788174091734 - DOKUMEN.PUB

Electrical Machinery by Dr. P.S. Bimbhra is widely considered a cornerstone textbook for electrical engineering students and professionals. Known for its balanced presentation of rigorous theory and practical engineering applications, it has become a staple for university courses and competitive examinations such as GATE, IES, and PSU technical interviews. Core Topics Covered

The book offers in-depth coverage of both static and rotating electrical machines, ensuring that fundamental principles are understood before moving to complex operational details.

Ps Bimbhra Electrical Machines Book - sciphilconf.berkeley.edu

Electrical Machinery by Dr. P.S. Bimbhra is widely considered a definitive resource for undergraduate students and practicing engineers in electrical engineering. The book is celebrated for its systematic approach to complex topics like transformers, DC machines, and synchronous machines, bridging the gap between theoretical electromagnetic principles and real-world industrial applications. Core Content and Structure

The text is organized into logical units that build from basic concepts to advanced machine dynamics:

Fundamental Principles: Covers magnetic circuits, electromagnetic energy conversion, and basic principles common to all electrical machines.

Transformers: Detailed exploration of construction, ideal vs. practical models, efficiency, and testing methods.

DC Machines: Focuses on armature reaction, commutator action, and the speed-torque characteristics of DC motors and generators.

AC Machinery: Comprehensive sections on three-phase synchronous machines and polyphase induction motors, including starting methods and performance analysis.

Armature Windings: Dedicated chapters on the construction and layout of various machine windings.

Ps Bimbhra Electrical Machines Book - sciphilconf.berkeley.edu

Dr. P.S. Bimbhra’s "Electrical Machinery" is a foundational textbook for Indian electrical engineering students, covering essential topics from transformer analysis to advanced rotating machinery, and is widely utilized for GATE and IES preparation. The text is highly regarded for focusing on physical intuition and providing numerous exam-oriented problems, making it a key resource for competitive examinations. For more details, visit [PDF] Download Electrical Machines Book by PS Bimbhra free 18 May 2021 —

Introduction

Electrical machinery is a vital part of modern industry and has numerous applications in various fields, including power generation, transmission, and distribution. The study of electrical machinery is essential for electrical engineers to understand the principles, design, and operation of various electrical machines.

Classification of Electrical Machines

Electrical machines can be broadly classified into two categories:

1. Rotating Machines: These machines convert electrical energy into mechanical energy or vice versa. Examples include:
   • DC Machines (DC Motors and Generators)
   • AC Machines (Synchronous Motors, Induction Motors, and Synchronous Generators)
2. Static Machines: These machines do not have any moving parts and are used to transfer energy from one circuit to another. Examples include:
   • Transformers
   • Static Converters (Rectifiers and Inverters)

DC Machines

DC machines are used to convert electrical energy into mechanical energy or vice versa. They are widely used in applications such as:

• Traction (Electric Locomotives)
• Industrial drives (Pumps, Fans, and Conveyors)
• Power generation (DC Generators)

Construction of DC Machines

A DC machine consists of the following main components:

• Armature: The armature is the rotating part of the machine, which carries the armature windings.
• Field System: The field system produces the magnetic field required for the machine operation.
• Commutator: The commutator is used to convert AC to DC or vice versa.

Types of DC Machines

There are two main types of DC machines:

• DC Motor: A DC motor converts electrical energy into mechanical energy.
• DC Generator: A DC generator converts mechanical energy into electrical energy.

AC Machines

AC machines are widely used in power generation, transmission, and distribution. They are classified into two main categories:

• Synchronous Machines: Synchronous machines operate at a synchronous speed, which is determined by the frequency of the supply voltage.
• Induction Machines: Induction machines operate at a speed that is slightly less than the synchronous speed.

Construction of AC Machines

An AC machine consists of the following main components:

• Stator: The stator is the stationary part of the machine, which carries the stator windings.
• Rotor: The rotor is the rotating part of the machine, which carries the rotor windings.

Types of AC Machines

There are several types of AC machines, including:

• Synchronous Motor: A synchronous motor operates at a synchronous speed and is widely used in applications such as power factor correction.
• Induction Motor: An induction motor is widely used in applications such as industrial drives and household appliances.
• Synchronous Generator: A synchronous generator is widely used in power generation.

Transformers

Transformers are static machines used to transfer energy from one circuit to another through electromagnetic induction. They are widely used in power transmission and distribution.

Construction of Transformers

A transformer consists of the following main components:

• Primary Winding: The primary winding is the winding that receives the input voltage.
• Secondary Winding: The secondary winding is the winding that delivers the output voltage.
• Core: The core provides a low-reluctance path for the magnetic flux.

Types of Transformers

There are several types of transformers, including:

• Step-up Transformer: A step-up transformer increases the voltage of the input signal.
• Step-down Transformer: A step-down transformer decreases the voltage of the input signal.

Electrical Machinery by P.S. Bimbhra - PDF

The PDF version of "Electrical Machinery" by P.S. Bimbhra is a comprehensive resource for electrical engineers. The book covers the fundamental principles, design, and operation of various electrical machines, including DC machines, AC machines, and transformers.

The book is divided into several chapters, including:

• Introduction to Electrical Machines
• DC Machines
• AC Machines
• Transformers
• Electric Machine Design

The PDF version of the book provides a detailed analysis of each topic, along with diagrams, illustrations, and examples.

Advantages of Electrical Machinery by P.S. Bimbhra

The book "Electrical Machinery" by P.S. Bimbhra is a popular textbook for electrical engineering students and professionals. The advantages of the book include:

• Comprehensive coverage of electrical machines
• Clear and concise explanations
• Numerous diagrams and illustrations
• Examples and case studies

Conclusion

In conclusion, electrical machinery is a vital part of modern industry and has numerous applications in various fields. The study of electrical machinery is essential for electrical engineers to understand the principles, design, and operation of various electrical machines. The book "Electrical Machinery" by P.S. Bimbhra is a comprehensive resource for electrical engineers, providing a detailed analysis of various electrical machines, including DC machines, AC machines, and transformers.

Electrical Machinery Dr. P.S. Bimbhra is a comprehensive textbook widely used in electrical engineering for its detailed coverage of transformers and rotating machines Key Features of the Textbook Comprehensive Coverage

: Includes in-depth treatment of three basic machine types: DC machines, synchronous machines, and induction machines Unified Treatment

: Develops basic principles of voltage generation and torque production applicable to both AC and DC machines Practical Insights

: Discusses engineering considerations like machine losses, efficiency, cooling, and rating Problem Solving

: Features numerous solved examples and end-of-chapter problems to reinforce understanding Modern Applications

: Includes specialized topics such as three-phase induction generators for wind energy Main Topics Covered Transformers

: Core construction, EMF equations, equivalent circuits, and testing (OC/SC tests) DC Machines

: Starting methods (shunt, compound, and series starters), speed control, and performance testing Synchronous Machines

: Excitation systems, phasor diagrams, and cylindrical vs. salient-pole rotor characteristics Induction Motors

: Rotating field theory, equivalent circuits, and starting methods for single-phase and polyphase types Electromechanical Energy Conversion : Fundamental principles of energy flow in machines Digital Resources & PDF Availability Electrical Machinery PS Bimbhra | PDF - Scribd

A popular resource for electrical engineering students!

"Electrical Machinery" by P.S. Bimbhra is a well-known textbook that provides comprehensive coverage of electrical machines, also known as electrical machinery or electric machines. Here's an informative piece about the book:

Overview

The book "Electrical Machinery" by P.S. Bimbhra is a widely used textbook for undergraduate students of electrical engineering. It provides a detailed analysis of various types of electrical machines, including DC machines, AC machines, transformers, and special machines.

Key Features

1. Comprehensive coverage: The book covers a wide range of topics related to electrical machines, including their construction, working principles, characteristics, and applications.
2. Theoretical and practical aspects: The author has balanced theoretical and practical aspects of electrical machines, making it easier for students to understand and relate to real-world applications.
3. Solved examples and problems: The book includes numerous solved examples and practice problems to help students reinforce their understanding of the subject matter.
4. Illustrations and diagrams: The book is rich in illustrations, diagrams, and tables, which facilitate easy understanding of complex concepts.

Topics Covered

The book covers the following topics:

1. Introduction to electrical machines
2. DC machines (generators and motors)
3. Transformers
4. AC machines (synchronous generators, synchronous motors, induction motors)
5. Special machines ( stepper motors, servo motors, brushless DC motors)
6. Electric machine design and testing

Why it's popular

"Electrical Machinery" by P.S. Bimbhra is a popular textbook among electrical engineering students due to its:

1. Clear explanations: The author's writing style is clear, concise, and easy to understand.
2. Comprehensive coverage: The book covers a wide range of topics related to electrical machines.
3. Practice problems: The inclusion of numerous practice problems helps students to assess their understanding of the subject matter.

PDF Availability

As you mentioned, the PDF version of "Electrical Machinery" by P.S. Bimbhra is widely available online. However, I must remind you that downloading copyrighted materials without permission may infringe on the author's and publisher's rights. It's always best to purchase a legitimate copy or access it through authorized online platforms.