Detailed Disassembly And Function Of Core Electrical Control And Power Components Of Diesel Generator Set (Part 1)

Detailed Disassembly and Function of Core Electrical Control and Power Components of Diesel Generator Set (Part 1)

1. Three-piece speed regulation system: speed sensor, governor board, actuator (core for controlling rotational speed/frequency)

1. Speed sensor (tachometer probe/magnetoelectric sensor)

- Installation location: next to the flywheel ring, close to the diesel engine flywheel gear

- Working principle: magnetoelectric induction, the flywheel gear cuts the magnetic field to generate an AC voltage signal

- Core functions:

1. Collect the actual speed of the diesel engine in real time and convert it into an electrical signal sent to the governor board;

2. The governor board relies on this signal to compare with the set rated speed and determine whether the unit is running fast or slow;

3. Without the speed signal, the governor system fails, and the unit cannot maintain a stable speed or may even fail to start;

4. For synchronized grid-connected units, the speed signal is also the basis for synchronous frequency regulation. 

 

- Malfunction symptoms: surging, unstable idle, inability to start, RPM fault reported.