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Multi-carrier period PFC control method

A technology of carrier cycle and control method, which is applied in the field of multi-carrier cycle PFC control, can solve problems such as high cost and complex circuit, and achieve the effect of alleviating calculation pressure and reducing operation time

Active Publication Date: 2020-09-08
SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Software PFC adds an inductor and IGBT (Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor) to the circuit, and realizes PFC control by controlling the IGBT on and off through software; the hardware PFC control method needs to be added on the basis of the software PFC control circuit. Additional hardware circuit, the circuit is more complicated and the cost is higher

Method used

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  • Multi-carrier period PFC control method
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  • Multi-carrier period PFC control method

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Embodiment Construction

[0057] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0058] image 3 A schematic diagram of a PFC circuit provided for an embodiment of the present invention, such as image 3 As shown, the PFC circuit includes a rectifier bridge 100, a filter capacitor 200, a drive switching device 300 (IGBT), a voltage stabilizing capacitor 400, a frequency converter 500, an inductance coil 600, a sampling resistor 700, and a diode 800. The rectifier bridge 100...

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Abstract

The embodiment of the invention discloses a multi-carrier period PFC control method, and relates to the field of household appliance control. The method is applied to a PFC circuit comprising a driving switching device. The method comprises the following steps: dividing a carrier period of a PFC algorithm into at least two periods; acquiring a PFC algorithm step which originally needs to be completed in a single carrier period, and acquiring a step needing to be calculated in the PFC algorithm step; dividing steps needing to be calculated in the PFC algorithm into at least two carrier periodsfor calculation to enable calculation of the respective divided steps to be completed in each carrier period in the at least two carrier periods, and acquire respective remaining data in a non-calculation mode to obtain respective calculation results of each carrier period. Therefore, calculation needing to be completed in a single carrier period is divided into a plurality of carrier periods, thecalculation pressure of each carrier period is relieved, and the operation time of the PFC algorithm in each carrier period is shortened.

Description

technical field [0001] The invention relates to the field of home appliance control, in particular to a multi-carrier period PFC control method. Background technique [0002] Inverter air conditioner compressors generally use permanent magnet synchronous motors with adjustable speed, and inverter air conditioners are usually controlled by AC-DC-AC frequency conversion. Therefore, when the frequency and load of the inverter air conditioner increase, the DC bus voltage will drop, and the current distortion will increase, resulting in a drop in power factor. The current waveform is as follows: figure 1 shown. In order to stabilize the DC voltage, increase the power factor and reduce electromagnetic interference, a PFC (Power Factor Correction, power factor correction) control technology is usually used. After adding PFC control, the current waveform returns to the ideal state as figure 2 The state shown is close to sinusoidal. [0003] The methods of power factor correctio...

Claims

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Application Information

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IPC IPC(8): H02M1/42
CPCH02M1/4208Y02B70/10
Inventor 朱绯石明杰王声纲石泽发
Owner SICHUAN HONGMEI INTELLIGENT TECH CO LTD