Constant frequency and constant voltage sine-wave power unit consisting of axle generator and inverter

Abstract

The invention relates to a constant frequency and constant voltage sine-wave power unit consisting of an axle generator and an inverter, which consists of a power device, the generator and the inverter and is characterized in that a rotor of the generator is provided with 20 poles of permanent magnet excitation and electric excitation; the rotor is provided with no winding; a double-star six-phase winding is arranged in a stator slot; the excircle of a stator iron core is provided with a ring-shaped exciting winding; excitation is controlled by a voltage regulator AVR; the AVR carries out magnet increase, magnet weakening and constant voltage control by inputting two parameters of a phase voltage and a frequency; the generator is a variable speed constant voltage axle brushless generator;the inverter consists of a six-phase bridge rectifier, a four-translator IGBT switch inverter circuit, a filter circuit and a DSP control circuit; and the power unit outputs constant frequency and constant voltage sine-wave power. The constant frequency and constant voltage sine-wave power unit has the advantages of small volume, light weight, simplified control, reliable operation, stable working, excellent performance, small filter capacitor, high electromagnetic compatibility and high efficiency.

Description

technical field [0001] The invention relates to a constant frequency and constant voltage sine wave power supply machine, in particular to a constant frequency constant voltage sine wave power supply machine composed of a shaft generator and an inverter. Background technique [0002] Due to the current shaft generators used in travel, the rotational speed of the gearbox system driven by the engine changes. To obtain a sine wave AC power supply with constant frequency and constant voltage, the structure is complex and the volume is huge. For example, the variable speed output by the gearbox is input into an adjustable speed electromagnetic clutch. The electromagnetic clutch outputs a constant speed, and the constant speed drives a constant speed power frequency synchronous generator to generate a sine wave alternating current of constant frequency and constant voltage. The speed regulating clutch added in the middle of the system is larger and heavier than the generator body,...

AI Technical Summary

Problems solved by technology

[0002] Due to the shaft generators currently used in travel, the speed of the gearbox system driven by the engine changes. To obtain a sine wave AC power supply with constant frequency and constant voltage, the structure is complex and the volume is large.

For example, the variable speed output by the gearbox is input into an adjustable speed electromagnetic clutch, which outputs a constant speed, and the constant speed drives a constant speed power frequency synchronous generator to generate a sine wave alternating current of constant frequency and constant voltage. The speed regulating clutch added in the middle of the system is larger and heavier than the generator body, and the power frequency generator itself is also larger and heavier. Due to the limited space and load of the vehicle, the efficiency is also very high. Low, generally lower than 70%, so it is difficult to popularize the constant-frequency constant-voltage power supply driven by the constant-speed output of the electromagnetic clutch, and it is rarely used in practice.

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