Converter controlled power generator

Abstract

The performance of a generator is improved in a higher range of the output by correcting a decrease in the average direct current voltage supplied to an inverter. An average calculator 95 calculates an average of direct current voltage inputs to the inverter 4 for comparing with a target voltage (level) VDC. When it is judged by an average voltage deviation detector 96 that the average is smaller by a specific amount than the target voltage level, the target voltage level is increased by an adjusting unit 98. A conductor angle setting unit 93 determines the conduction angle of thyristors to change the voltage input of the inverter (4) to an adjusted target voltage level VDCm. A thyristor drive circuit 94 controls the conduction of the thyristors in the converter 3 according to the conduction angle.

Description

technical field [0001] The present invention relates to an inverter-controlled generator, and more particularly, to an inverter-controlled generator capable of operating the generator with good efficiency over a wide rotation range even if the output power of the inverter fluctuates. Background technique [0002] Inverters are increasingly used in motor generators used as AC power supply devices to stabilize output frequencies. Image 6 It is a block diagram showing an example of a power generation device using an inverter. The three-phase AC power generated by the generator 100 is converted into DC power by the rectifier 110 including a thyristor, and then input to the inverter 130 through the capacitor smoothing unit 120 . The inverter 130 converts the input DC power into AC power of a commercial frequency and outputs it. Such an inverter-controlled generator using a motor generator is described in JP-A-11-308896 and JP-A-6-121597. In an inverter-controlled generator, si...

AI Technical Summary

Problems solved by technology

Especially in terms of output characteristics, when the generator is operated at a high speed in order to extract a large output power, it is difficult to obtain a sufficiently large output power, and the operating efficiency is reduced.

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