What are the reasons for a diesel generator not generating electricity?
2 Answers
Introduction to the reasons why a diesel generator does not generate electricity: 1. The generator's magnetic poles lose their magnetism; 2. The generator's magnetic poles are short-circuited; 3. The excitation winding is incorrectly connected, with reversed polarity; 4. Poor contact between the generator's brushes and slip rings, or insufficient brush pressure; 5. Poor contact in the generator switch; 6. The fuse is blown. Below is an introduction to diesel generators: 1. Definition: A diesel generator is a small power generation device that uses diesel or other fuels as energy sources, with a diesel engine as the prime mover to drive the generator for power generation. The complete unit generally consists of components such as the diesel engine, generator, control box, fuel tank, starting and control battery, protection device, and emergency cabinet. 2. Working principle: Inside the diesel engine cylinder, the clean air filtered by the air filter fully mixes with the high-pressure atomized diesel injected by the fuel injector. Under the compression of the upward-moving piston, the volume decreases, and the temperature rapidly rises to the ignition point of diesel. The diesel is ignited, the mixed gas burns violently, the volume rapidly expands, pushing the piston downward, which is called 'power stroke'. Each cylinder performs the power stroke in a certain sequence, and the thrust acting on the piston is transformed into a force that drives the crankshaft to rotate through the connecting rod, thereby driving the rotation of the crankshaft.
When a diesel generator fails to generate electricity, I usually start by checking fuel issues. Running out of fuel or clogged fuel lines are the most common problems—I once forgot to refuel in a hurry, and the engine wouldn't start. Poor fuel quality can also clog the filter, preventing the engine from running properly. Next is the battery issue; if the battery is too weak, the starting system won't function well, and the engine won't ignite to generate power. I also check whether the starter is stuck or if the belt is loose or broken—it drives the generator rotor to spin. Control panel or AVR (Automatic Voltage Regulator) failures occur frequently; if the AVR is faulty, the output current becomes unstable. Loose or short-circuited wiring is often overlooked—tightening connections or checking fuses can sometimes solve the problem. Maintenance is crucial: regular oil changes and battery tests prevent panic when issues arise. Don’t worry if this happens—step-by-step troubleshooting saves time.
