Power supply circuit for inverter power sources and home appliance with same

Abstract

The invention discloses a power supply circuit for inverter power sources and a home appliance with the same. The power supply circuit comprises a motor, a power input module connected with a power source, a rectifier module connected with the power input module and having a first output end and a second output end, a first capacitor connected between the first output end and the second output end of the rectifier module, a discharge module connected in parallel with the first capacitor and including a first resistor and a second capacitor which are connected in series, an inverter module connected with the first output end and the second output end of the rectifier module and used for controlling the motor, an acquisition module used for acquiring the voltage of the first capacitor, a brake signal generation module used for generating a brake signal according to the voltage of the first capacitor, and a control module used for controlling brake of the motor according to the brake signal in order to implement protection through brake control in the case of overvoltage and ensure that the voltage of the first capacitor fluctuates in a preset range.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a power supply circuit of an inverter power supply and a household appliance with the power supply circuit. Background technique [0002] With the advancement of technology, the capacitance of the smoothing filter capacitor of the inverter power supply is gradually decreasing. However, as the capacitance value decreases, the voltage fluctuation on the smoothing filter capacitor becomes larger, especially for motor loads that are prone to out-of-step risks, and the voltage on the smoothing filter capacitor will suddenly rise to a relatively high level, exceeding the endurance of the power device. pressure value. [0003] Therefore, there is a need for improvement in the related art. Contents of the invention [0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present ...

AI Technical Summary

Problems solved by technology

However, as the capacitance value decreases, the voltage fluctuation on the smoothing filter capacitor becomes larger, especially for motor loads that are prone to out-of-step risks, and the voltage on the smoothing filter capacitor will suddenly rise to a relatively high level, exceeding the endurance of the power device. pressure value

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