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PFC circuit control method and device, computer readable storage medium and controller

A control method and circuit technology are applied in the control field of computer readable storage medium and controller and PFC circuit, which can solve the problems of increasing the calculation load of the controller, limiting the upper limit of the PFC carrier frequency, increasing the cost of the controller, etc. The effect of inductance and size, increasing carrier frequency, and reducing calculation amount

Active Publication Date: 2021-04-09
FOSHAN SHUNDE MIDEA ELECTRONICS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after increasing the carrier frequency of PFC, the calculation of each carrier period will increase the calculation load of the controller, which seriously limits the upper limit of the PFC carrier frequency
The traditional solution is to replace the controller with a higher operation speed to increase the carrier frequency of the PFC, but increasing the operation speed of the controller will lead to an increase in the cost of the controller

Method used

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  • PFC circuit control method and device, computer readable storage medium and controller
  • PFC circuit control method and device, computer readable storage medium and controller
  • PFC circuit control method and device, computer readable storage medium and controller

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0037] DC inverter compressors and DC fans of inverter air conditioners generally use permanent magnet synchronous motors, and the hardware topology uses AC-DC-AC power supply. Such as figure 1As shown, the power supply topology of the permanent magnet synchronous motor includes an AC filter unit 11, a rectifier unit 12, a PFC circuit 13, a bus filter unit 14 and an inverter unit 15, wherein the AC filter unit 11 is used to perform AC power on the AC power supply 10 filter processing, the rectifier unit 12 is used to convert the...

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Abstract

The invention discloses a PFC circuit control method and device, a computer readable storage medium and a controller. The control method comprises the following steps: acquiring an AD sampling value required for controlling the PFC circuit; carrying out reconstruction filtering on the obtained AD sampling value every other at least two carrier periods to obtain a corresponding calculation parameter, and calculating a duty ratio according to the calculation parameter so as to multiplex the duty ratio in the at least two carrier periods; and controlling the PFC circuit according to the multiplexed duty ratio. The duty ratio is calculated every other at least two carrier periods, and the duty ratio is multiplexed, so that the calculated amount of the controller can be effectively reduced, the carrier frequency of the PFC circuit is improved, meanwhile, the controller with high operational capability does not need to be replaced, and the cost is favorably controlled; as the carrier frequency of the PFC circuit is improved, the inductance value and size of the inductor can be further reduced, the power density of the controller is improved, and inductor heating is reduced.

Description

technical field [0001] The present invention relates to the technical field of power factor correction, in particular to a control method, device, computer-readable storage medium and controller of a PFC circuit. Background technique [0002] DC inverter compressors and DC fans of inverter air conditioners generally use permanent magnet synchronous motors, and the AC-DC-AC form of hardware topology is used to power the permanent magnet synchronous motors. In order to reduce the harmonic interference of the air conditioner to the power grid and reduce the interference of the power grid to the air conditioner, and to stabilize the bus voltage and improve the power factor, a PFC (Power Factor Correction) circuit will be added to the hardware topology. For the control of power factor circuit, by adding high-frequency inductance, IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) and fast recovery diode to the circuit topology, the IGBT is turned on and o...

Claims

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Application Information

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IPC IPC(8): H02M1/42H02P27/06H02P25/024
CPCH02M1/4225H02P27/06H02P25/024Y02B70/10
Inventor 付兆强朱家辉霍军亚毕然梁国强王明明
Owner FOSHAN SHUNDE MIDEA ELECTRONICS TECH CO LTD
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