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Control device with compensatory active PFC (power factor correction) and control method thereof

A technology of control device and voltage compensation, applied in the direction of output power conversion device, high-efficiency power electronic conversion, electrical components, etc., can solve the problems of high cost, large ripple, large loss, etc. Effect of Power Factor Guarantee

Inactive Publication Date: 2010-07-14
MIDEA GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing active PFCs are all manufactured using dedicated chips from semiconductor manufacturers. Since the feedback and control are all completed by hardware, there is a big disadvantage, that is, the output voltage Vdc is fixed, and it is aimed at the domestic 220Vac power supply. The output voltage Vdc is set higher, generally around 380Vdc, so that the interference generated during frequency conversion and inversion is greater, the loss is greater, and the cost is also higher. At the same time, no compensation is added, so that the output ripple is relatively large

Method used

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  • Control device with compensatory active PFC (power factor correction) and control method thereof
  • Control device with compensatory active PFC (power factor correction) and control method thereof
  • Control device with compensatory active PFC (power factor correction) and control method thereof

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] see Figure 1-Figure 2 , the active PFC control device with compensation includes a rectification unit circuit 3 connected in sequence, a PFC unit circuit 1 and a filter energy storage unit circuit 2, an input voltage sampling circuit 6 is connected in parallel with the output of the input rectification unit circuit 3, and the load The current sampling circuit 4 is connected in series between the PFC unit circuit 1 and the input rectification unit circuit 3, the voltage sampling unit circuit 7 is connected in parallel with the filter energy storage unit circuit 2, the PFC drive circuit 12 is connected with the PFC unit circuit 1; the main control MCU 8 is respectively connected to the input The voltage sampling circuit 6 and the PFC drive circuit 12 are connected to the voltage sampling unit circuit 7 .

[0044] The input voltage sampling circuit ...

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Abstract

The invention relates to a control device with a compensatory active PFC (power factor correction) and a control method thereof. The control device with the compensatory active PFC comprises an input rectifying unit circuit, a PFC unit circuit and a filtering energy storage unit circuit which are sequentially connected, wherein an input voltage sampling circuit is connected with the output of the input rectifying unit circuit in parallel; a load current sampling circuit is connected between the PFC unit circuit and the input rectifying unit circuit in series; a voltage sampling unit circuit of PFC output voltage is connected with the filtering energy storage unit circuit in parallel; a PFC driving circuit is connected with the PFC unit circuit; a main control unit (MCU) is respectively connected with the input voltage sampling circuit, the PFC driving circuit and the voltage sampling unit circuit; and the MCU comprises any one or a combination of more than two of a voltage compensation correction factor module, a load current correction factor module and a compressor parameter correction module. The invention has the characteristics of flexible operation and reduction of interference, loss and cost.

Description

technical field [0001] The invention relates to a control device and a control method of an active PFC with compensation. Background technique [0002] At present, PFC is widely used in the field of inverter air conditioner control, and active PFC has also begun to emerge. However, the existing active PFCs are all manufactured using dedicated chips from semiconductor manufacturers. Since the feedback and control are all done by hardware, there is a big disadvantage, that is, the output voltage Vdc is fixed, and it is aimed at the domestic 220Vac power supply. The output voltage Vdc is set higher, generally around 380Vdc, so that the interference generated during frequency conversion and inversion is greater, the loss is greater, and the cost is also higher. At the same time, no compensation is added, so that the output ripple is relatively large. Contents of the invention [0003] The purpose of the present invention is to provide a control device and control device for a...

Claims

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Application Information

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IPC IPC(8): H02M1/42H02M1/14
CPCY02B70/126Y02B70/10
Inventor 王斌
Owner MIDEA GRP CO LTD
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