Electrical Machines-I (Diploma)

DC machines and single-phase and three-phase transformers.

6 महीनेअवधि 5Chapters26टॉपिक

अभी पूछताछ करें

सिलेबस · पाठ्यक्रम

Download PDF

01DC Generators 6 टॉपिक

Construction of DC machines
EMF equation
Lap and wave windings
Types of DC generators
Armature reaction and commutation
Characteristics of DC generators

02DC Motors 5 टॉपिक

Principle and back emf
Torque equation
Types and characteristics of DC motors
Speed control methods
Three-point and four-point starters

03Losses and Testing of DC Machines 4 टॉपिक

Losses in DC machines
Efficiency and condition for maximum efficiency
Swinburne's test
Brake test and Hopkinson's test (introduction)

04Single-Phase Transformers 6 टॉपिक

Construction and types
EMF equation and turns ratio
Phasor diagrams on no load and load
Equivalent circuit
OC and SC tests
Voltage regulation and efficiency, all-day efficiency

05Three-Phase Transformers and Autotransformers 5 टॉपिक

Three-phase transformer connections
Vector groups (Dyn11)
Parallel operation
Autotransformer and copper saving
Cooling of transformers

परिचय

आप यह कर पाएँगे

Explain the construction, EMF equation and characteristics of DC generators
Explain the working, torque, characteristics, speed control and starting of DC motors
Calculate losses and efficiency of DC machines and explain Swinburne's test
Explain the construction, EMF equation, equivalent circuit, regulation and efficiency of single-phase transformers
Explain three-phase transformer connections, parallel operation and autotransformers

यह किसके लिए है

Diploma Electrical Engineering students of Semester 3 (BTEUP)
Students preparing for JE (Electrical) and electrician-level exams

आपको क्या चाहिए

Basic electricity and magnetism (Faraday's laws, magnetic circuits)

सवाल

Is the lab separate?

Yes. Machine tests are done in the Electrical Machines-I Lab; this course covers the theory paper.

Are numericals included?

Yes. EMF equation, back emf, speed, efficiency and regulation problems are solved.

Is this course based on the BTEUP syllabus?

Yes. The units follow the BTEUP (Board of Technical Education, Uttar Pradesh) diploma syllabus. If your polytechnic follows a different board or a revised scheme, the centre teaches your own syllabus.