Permanent magnet numeral power set with multiple oil engines

Abstract

The generating set includes oil engines and connected permanent magnet generator (PMG). Through rectifying bridge, AC output from PMG is converted to DC. The said oil engines, PMG and rectifying bridge, and rectifying bridge contain two routes. Passing through capacitor filtering, paralleled DC outputted from rectifying bridge enters into inverter controller, which outputs AC. Using multiple gasoline or diesel engines in small power; the disclosed generating set realizes AC output in large power. Advantages are: high quality of electric energy, high efficiency, high reliability, simple structure, small size and mass. The invention is suitable to permanent magnet digital generating set for power more than 5KVA, especially 0KVA and higher power.

Description

technical field [0001] The invention relates to a permanent magnet digital generator set, in particular to a high dynamic rate permanent magnet digital generator set formed by parallel connection of a plurality of diesel generators. Background technique [0002] Gasoline / diesel generator sets use single-cylinder oil engines at 5KVA and below. At higher power, especially after reaching 10KVA, multi-cylinder oil engines are generally used. The multi-cylinder oil engine is expensive, complex in structure, high in fuel consumption and high in operating cost, and is difficult to be accepted by most users. If multiple low-power generator sets output AC directly in parallel, high power output can be obtained in theory, but it is difficult to reliably ensure that multiple gasoline / diesel generator sets generate synchronously and without phase difference in actual operation, so it is difficult to realize multiple gasoline / diesel generator sets. / Diesel generator sets are connected...

AI Technical Summary

Problems solved by technology

Multi-cylinder oil engines are expensive, complex in structure, high in fuel consumption, and high in operating costs, making them unacceptable to most users

If multiple low-power generator sets output AC directly in parallel, high power output can be obtained in theory, but it is difficult to reliably ensure that multiple gasoline / diesel generator sets generate synchronously and without phase difference in actual operation, so it is difficult to realize multiple gasoline / diesel generator sets. / Diesel generator set connected to the grid for power generation

At present, the high-power gasoline / diesel generator sets above 5KVA basically use the traditional excitation generator, which consumes a lot of metal materials and has low power generation efficiency.

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