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Control method, apparatus and equipment of PFC circuit, and storage medium

A control method and technology of a control device, which are applied to output power conversion devices, electrical components, high-efficiency power electronic conversion, etc., can solve problems such as the inability to accurately realize the current loop control process, and achieve the purpose of preventing erroneous actions, suppressing harmonic components, The effect of ensuring power quality

Inactive Publication Date: 2017-10-24
GUANGZHOU SHIYUAN ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the embodiments of the present invention provide a control method, device, equipment, and storage medium for a PFC circuit, so as to solve the existing technical problem that the current loop control process cannot be accurately realized when the PFC circuit is controlled.

Method used

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  • Control method, apparatus and equipment of PFC circuit, and storage medium
  • Control method, apparatus and equipment of PFC circuit, and storage medium
  • Control method, apparatus and equipment of PFC circuit, and storage medium

Examples

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Embodiment 1

[0035] figure 1 It is a flow chart of a method for controlling a PFC circuit provided by Embodiment 1 of the present invention. The control method of the PFC circuit provided in this embodiment is applicable to the situation where the double closed-loop control of the outer voltage loop and the inner current loop is performed on the PFC circuit. The control method of the PFC circuit provided in this embodiment can be executed by a control device of the PFC circuit, and the control device can be implemented in the form of software and / or hardware, and integrated into the control device of the PFC circuit.

[0036] refer to figure 1 The control method of the PFC circuit provided in this embodiment specifically includes:

[0037] S110. Obtain an AC current error parameter in the PFC circuit.

[0038] Exemplarily, the PFC circuit may be a half-wave rectification circuit, or a bridge rectification circuit. The PFC circuit includes a DC signal and an AC signal, and the PFC circu...

Embodiment 2

[0051] Figure 2a It is a flow chart of a method for controlling a PFC circuit provided by Embodiment 2 of the present invention. This embodiment is embodied on the basis of the above-mentioned embodiments. Specifically, refer to Figure 2a A method for controlling a PFC circuit provided in this embodiment specifically includes:

[0052] S210. Obtain an actual AC current parameter in the PFC circuit.

[0053] S220. Determine an expected AC current parameter corresponding to an actual AC current parameter.

[0054] Specifically, in the PFC circuit, the actual AC current parameter at each moment has a corresponding expected AC current parameter. Among them, refer to Figure 2b , the method for determining the expected parameter of the alternating current specifically includes:

[0055] S221. Obtain an expected DC voltage parameter and an actual DC voltage parameter and an actual AC voltage parameter corresponding to the actual AC current parameter.

[0056] Wherein, the e...

Embodiment 3

[0088] image 3 It is a schematic structural diagram of a control device for a PFC circuit provided by Embodiment 3 of the present invention. The control device for the PFC circuit provided in this embodiment specifically includes: an acquisition module 301 , a modulation module 302 and a control module 303 .

[0089] Wherein, the acquisition module 301 is used to obtain the AC current error parameter in the PFC circuit; the modulation module 302 is used to perform proportional integral resonance control on the AC current error parameter, and obtains the PWM parameter according to the control result; the control module 303 is used to obtain the PWM parameter according to The PWM parameter controls the switching tube in the PFC circuit.

[0090] To sum up, by obtaining the AC current error parameters in the PFC circuit, and performing proportional integral resonance control on the AC current error parameters, effective control of the harmonic components in the AC current error...

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Abstract

The invention discloses a control method, apparatus, and equipment of a PFC circuit, and a storage medium. The control method comprises: obtaining an alternating current error parameter in the PFC circuit; performing proportional-integral resonant control on the alternating current error parameter, and obtaining a PWM parameter according to a control result; and controlling a switch tube in the PFC circuit according to the PWM parameter. By employing the control method, the technical problem of failure of accurate realization of a current loop control process during control of the PFC circuit can be solved.

Description

technical field [0001] The present invention relates to the technical field of motors, in particular to a control method, device, equipment and storage medium of a PFC circuit. Background technique [0002] Power factor refers to the relationship between effective power and total power consumption (apparent power), that is, the ratio of effective power divided by total power consumption (apparent power). The larger the power factor value, the higher the power utilization rate. Usually, the maximum power factor is 1. [0003] At present, the mains power supply and industrial power supply are all AC power supply, and most of the electrical equipment are inductive load equipment. When providing AC power for inductive load equipment, the supply current lags behind the supply voltage. In particular, when the supply current is the largest, the corresponding supply voltage is almost zero, which will cause the current inside the inductive load to flow back into the power supply ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02M1/12H02M7/217
CPCH02M1/12H02M1/4208H02M7/2176Y02B70/10
Inventor 邓焕明
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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