Driving control circuit, air conditioning controller and air conditioner

Abstract

The invention provides a driving control circuit, an air conditioning controller and an air conditioner. The driving control circuit comprises a bus capacitor, a first capacitive element and a first temperature sensitive resistor, wherein the bus capacitor is used for providing the starting voltage needed by electrification of a load and is further used for absorbing a surge signal generated by the driving control circuit during the process of driving the load to operate, and the bus capacitor is connected to a bus line at the input side of an inverter bridge; the first capacitive element is used for absorbing the surge signal; the first temperature sensitive resistor is used for limiting a power supply signal flowing to the first capacitive element and / or the bus capacitor, and the firsttemperature sensitive resistor and the first capacitive element are connected in series between a high-voltage bus and a low-voltage bus; or the first capacitive element is connected between the high-voltage bus and the low-voltage bus in series, and the first temperature sensitive resistor is connected to the high-voltage bus in series. The surge absorption ability of the circuit is improved through directly connecting a capacitive element between the high-voltage bus and the low-voltage in series, and thus the reliability of the circuit is ensured.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 201910041293.0 and the title of the invention "drive control circuit, air conditioner controller and air conditioner" filed with the China Patent Office on January 16, 2019, the entire contents of which are hereby incorporated by reference In this application. technical field [0002] The present invention relates to the technical field of circuits, in particular to a drive control circuit, an air conditioner controller and an air conditioner. Background technique [0003] For example, three-phase load equipment such as compressors, motors, and engines adopts an AC-DC-AC topology. Specifically, the AC-DC-AC topology is as follows: figure 1 As shown, it includes: AC power module, power filter module, rectifier module, filter module, inverter module and load. [0004] Because the filter module needs to filter the rectified power frequency signal, it often uses a large-cap...

AI Technical Summary

Problems solved by technology

[0006] 1. Film capacitors or small electrolytic capacitors have limited surge absorption, resulting in excessive bus voltage and damage to components

[0007] 2. Film capacitors or small electrolytic capacitors have limited ability to absorb surges. If a surge voltage is input during normal operation of the prototype, the bus voltage will change suddenly and drastically, which will affect the control stability.

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