A high-performance inverter power supply with soft-start function of single-phase asynchronous motor

Abstract

The invention relates to the technical field of an inversion power supply, and discloses a high-performance inversion power supply having a single-phase asynchronous motor soft starting function. The high-performance inversion power supply mainly comprises a current limiting ring and a soft starting control module, wherein the inversion power supply acquires an error amount between an AC output current effective value and a current limiting given value, an output control factor is obtained by the current limiting ring, output voltage amplitude given quantity is obtained by subtracting the output control factor and AC output voltage effective value feedback quantity from AC output voltage amplitude quantity, the output voltage value is reduced after the output voltage amplitude given quantity is subjected to three-loop control, the soft starting control module is used for detecting an input signal of the inversion power supply and sending a control signal to a controller of the inversion power supply when the input voltage signal reaches a set value, and the controller is used for controlling amplitude of a sine wave signal according to the control signal so that the fundamental wave of the sine wave is continuously risen to 1 from 0 and the output AC voltage is gradually risen. The high-performance inversion power supply has the advantages that a circuit structure is simple and reliable.

Description

technical field [0001] The invention relates to the technical field of inverter power supply, and more specifically relates to a high-performance inverter power supply with the soft start function of a single-phase asynchronous motor. Background technique [0002] Power vehicles, also known as mobile power vehicles, have become important transportation and operating equipment in economic construction, and can be used for emergency power consumption and outdoor operations in communications, telecommunications, coal mines, power stations, oil fields, etc. As the main core component of the power supply vehicle, the inverter power supply is mainly used to convert the unstable amplitude and frequency voltage from the power supply vehicle generator into the mains voltage required by the load equipment. There are various types of load equipment, including motor loads. Single-phase asynchronous motors are widely used in household appliances (air conditioners, refrigerators, electri...

AI Technical Summary

Problems solved by technology

However, the start-up of the thyristor will cause high-order harmonics, which has a certain impact on the input power; the failure of the thyristor element is high and the price is high; at the same time, it is necessary to add a thyristor, thyristor drive and control circuit, and the cost is high

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