Buck-boost driving circuit, air conditioner, method and computer readable storage medium

Abstract

The invention provides a buck-boost driving circuit, an air conditioner, a method and a computer readable storage medium. The driving method comprises a bridge circuit configured to carry out rectification processing on a power supply signal, a step-down circuit and an inductive element, wherein the step-down circuit includes a first reverse blocking power tube and a first power tube which are sequentially connected between a high-voltage output end and a low-voltage output end of the bridge circuit in series; a first end of the inductive element is connected to a common end between the firstreverse blocking power tube and the first power tube; and the first reverse blocking power tube is controlled to be conducted or cut off according to a specified duty ratio, and a conduction state ofthe first power tube is opposite to that of the first reverse blocking power tube or a cut-off state is kept so as to carry out voltage reduction modulation on the power supply signal. According to the technical scheme, buck-boost adjustment is performed on a direct current bus voltage of a variable frequency motor so that a total loss of the motor is minimum, and high-efficiency control of a variable frequency compressor is achieved.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a buck-boost driving circuit, a buck-boost driving method, an air conditioner and a computer-readable storage medium. Background technique [0002] Generally speaking, the driving motor of the high-efficiency inverter compressor of the inverter air conditioner is usually a permanent magnet motor, so the iron loss of the motor is mainly affected by the DC bus voltage of the inverter controller. [0003] For example, without entering the field-weakening operation, the higher the DC bus voltage, the greater the iron loss of the motor, and the lower the DC bus voltage, the smaller the iron loss of the motor. Therefore, the DC voltage can be appropriately lowered to reduce the iron loss of the motor and improve the efficiency of the motor. [0004] In the related art, the power factor correction (Power Factor Correction, PFC) of the inverter air conditioner does not ...

AI Technical Summary

Problems solved by technology

For example, passive PFC, single-pulse and multi-pulse PFC do not have the function of regulating the DC bus voltage, and a typical boost PFC can only perform step-up regulation, but not step-down regulation

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