Synchronous Machines and Induced Voltage — Lesson 10

This lesson covers the fundamental concepts of synchronous machines, focusing on their structure and operation. It explains the three-phase armature winding and the field winding, and how direct current is fed into the field winding to establish flux. The lesson also discusses how the armature winding induces voltage and handles the main power. It further delves into the modeling of synchronous machines, the establishment of flux, and the impact of adjusting the field current. The lesson concludes with an in-depth explanation of induced voltage in synchronous machines, using Faraday's law of electromagnetic induction as a reference.

Video Highlights

01:29 - Understanding the concept of stator field and rotor field
04:13 - Explanation of the induced voltage in synchronous machines
07:29 - Application of Faraday's law of electromagnetic induction
10:29 - Discussion on the flux linkage with a single coil
29:20 - Understanding the phasor diagram in an open circuit

Key Takeaways

- Synchronous machines consist of a three-phase armature winding and a field winding.
- Direct current is fed into the field winding to establish flux, while the armature winding induces voltage and handles the main power.
- The induced voltage in synchronous machines can be understood using Faraday's law of electromagnetic induction.
- The flux linkage with a single coil varies with time, leading to a change in the induced voltage.
- In an open circuit, the induced voltage lags behind the flux per pole by 90 degrees, as depicted in the phasor diagram.