Driving control circuit and household appliance,

Abstract

The invention provides a driving control circuit and a household appliance. The driving control circuit comprises a voltage absorption compensation branch; the voltage absorption compensation branch and an inverter are in parallel connection; the voltage absorption compensation branch comprises a capacitive element and a switching device which are serially connected; the switching device is configured to control the capacitive element for charge or discharge; the capacitive element discharges to perform voltage compensation on the inverter; and the inverter is configured to drive load to operate. When the technical scheme is applied, voltage compensation is realized by the capacitive element when the voltage is low, system power fluctuation is avoided, the problem of the beat frequency noise caused when the input power supply signal is too low is thus solved, and effects of load current peak reduction and voltage compensation are realized.

Description

technical field [0001] The present invention relates to the technical field of drive control, in particular to a drive control circuit and a household electrical appliance. Background technique [0002] Generally speaking, the power factor of a passive PFC (Power Factor Correction, power factor correction) circuit is very low, and a capacitor with a large capacity needs to be used, resulting in a high cost of the passive PFC circuit. [0003] For the general circuit method without electrolytic capacitors, it has the following disadvantages: [0004] First, the DC bus voltage fluctuates greatly, causing the load current to fluctuate greatly and the peak value of the load current to be high. Therefore, it is necessary to set a higher specification overcurrent protection for the power module, resulting in an increase in cost; [0005] Second, there is a periodic phenomenon that the voltage of the bus with the same power frequency is insufficient and unable to output power, res...

AI Technical Summary

Problems solved by technology

[0004] First, the DC bus voltage fluctuates greatly, causing the load current to fluctuate greatly and the peak value of the load current to be high. Therefore, it is necessary to set a higher specification overcurrent protection for the power module, resulting in an increase in cost;

[0005] Second, there is a periodic phenomenon that the voltage of the bus with the same power frequency is insufficient and unable to output power, resulting in problems such as beat frequency noise

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