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Control method of operating condition of PFC (Power Factor Corrector) module

A technology of working state and control method, applied in heating and ventilation control system, heating mode, household heating, etc., can solve the problems of reducing the energy efficiency of air conditioners and not being able to follow the requirements.

Active Publication Date: 2012-01-04
安徽奥克斯智能电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Defects of the current technology: first, the PFC output voltage is a fixed value, and the PFC works in a single fixed mode; second, when the drive module of the DC inverter compressor requires the stagnant bus voltage to be adjusted according to the demand of the compressor, the PFC cannot control the DC bus The voltage is adjusted according to the change of the demand, and cannot follow the demand; third, when the PFC is fully working, the power consumption of the PFC is greater than 50W. Therefore, if the PFC is always working in the boost state, when the DC inverter At low frequency, the loss of PFC itself will reduce the energy efficiency of the air conditioner

Method used

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Examples

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with specific examples.

[0020] The entire control circuit of the DC inverter air conditioner is composed of functional modules such as the DC inverter compressor, the DC inverter compressor drive module, the PFC control module, the filter circuit, and the DC voltage input.

[0021] Among them, the PFC function module consists of: AC220V AC voltage input, reactor, IGBT and its drive circuit, DC voltage output, PFC control chip, PFC control signal input, zero-crossing detection, DC voltage detection, +15V and other power input, etc. ;

[0022] The functional modules of the DC variable frequency compressor driver module include: IPM module, DC variable frequency compressor driver chip, DC variable frequency compressor phase current or DC bus voltage detection, PFC control signal, DC voltage detection, external communication and +15V power supply Input, cement resistance and other components.

[0023] ...

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PUM

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Abstract

The invention relates to a control method of the operating condition of a PFC (Power Factor Corrector) module. The control method comprises the following steps: step 1: a direct current frequency conversion compressor driving module adopts a single-resistance bus current sampling mode to detect the voltage of a direct current bus after a direct current frequency conversion compressor is started and the operating power exceeds 600W, and then the compressor driving module selects a PFC operating mode according to the direct current voltage detection value and the voltage requirement of the direct current bus; step 2: when the PFC operating mode requires to be controlled according to the detection result in step 1, the PFC can operate in a boost mode, a partial PFC mode, an operation prohibited mode and a maintaining mode; and step 3: when control and adjustment of the PFC operating condition are completed, the operating power of a direct current frequency conversion compressor and the voltage of the direct current bus are detected, and then the PFC operating condition is controlled according to the detection result.

Description

Technical field: [0001] The invention relates to the field of air conditioning control, in particular to a method for controlling the working state of a PFC module. Background technique: [0002] At present, the PFC (power factor correction) for DC inverter air conditioners and the drive module of DC inverter compressors are independent of each other, and the PFC work is only related to the input current of the air conditioner. Defects of the current technology: first, the PFC output voltage is a fixed value, and the PFC works in a single fixed mode; second, when the drive module of the DC inverter compressor requires the stagnant bus voltage to be adjusted according to the demand of the compressor, the PFC cannot control the DC bus The voltage is adjusted according to the change of the demand, and cannot follow the demand; third, when the PFC is fully working, the power consumption of the PFC is greater than 50W. Therefore, if the PFC is always working in the boost state, w...

Claims

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Application Information

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IPC IPC(8): F24F11/00
Inventor 郑坚江刘志高程德威
Owner 安徽奥克斯智能电气有限公司
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