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PFC control method, device, air conditioner and storage medium

A control method and technology of a control device are applied in heating and ventilation control systems, output power conversion devices, heating methods, etc., and can solve the problems affecting the service life of air conditioners, frequent switching of power devices, and increased power device losses, etc. Achieve the effect of small current distortion, reduced loss, and reduced switching frequency

Active Publication Date: 2021-04-09
NINGBO AUX ELECTRIC
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Problems solved by technology

[0005] The problem solved by the present invention is the technical problem that the existing Boost type average current method makes the power device switch frequently, which causes the loss of the power device to increase and affects the service life of the air conditioner

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  • PFC control method, device, air conditioner and storage medium
  • PFC control method, device, air conditioner and storage medium
  • PFC control method, device, air conditioner and storage medium

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Embodiment Construction

[0040] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] Please refer to figure 1 , figure 1 It is a schematic block diagram of the air conditioner 10 provided by the present invention. The air conditioner 10 includes an external unit controller 11 , a memory 12 and a bus 13 , and the external unit controller 11 and the memory 12 are connected through the bus 13 .

[0042] Memory 12 is used to store programs such as Figure 8 The PFC control device 100 is shown. The PFC control device 100 includes at least one software function module that can be stored in the memory 12 in the form of software or firmware. After receiving the execution instruction, the external machine controller 11 executes the program to implement the PFC control method disclosed in the present invention.

[0043]Th...

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Abstract

A PFC control method, device, air conditioner, and storage medium provided by the present invention relate to the technical field of air conditioners, and detect the zero-crossing point of the output voltage of the rectifier bridge, and obtain the current value of the air-conditioner when the zero-crossing point of the output voltage is detected Compressor frequency, and then obtain the target off-time corresponding to the current compressor frequency; then, in each output voltage cycle of the rectifier bridge, the average current control strategy is adopted in the first and second time periods, and the target off-time The passive PFC control strategy is used to perform natural rectification on the rectifier bridge, so that the power device is always in the off state. Among them, the first duration, the target shutdown duration and the second duration are sequentially continuous and occupy one output voltage cycle, while the second The first duration is equal to the second duration. Therefore, while ensuring a high power factor, the switching frequency of the power device is reduced, the loss of the power device is reduced, and the service life of the air conditioner is increased.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a PFC control method and device, an air conditioner and a storage medium. Background technique [0002] At present, active PFC (Power Factor Correction, power factor correction) has been widely used due to its advantages of high power factor, small harmonic current, and stable output voltage. [0003] Commonly used control strategies for active PFC include peak value, hysteresis, average current, and single-cycle control. Taking the average current control as an example, the current loop has a high gain bandwidth, which can cause a small distortion of the tracking error, so it can obtain a high power factor (the power factor is close to 1), and it also has high stability. Noise insensitivity and other advantages, so it is widely used in the controller of the outdoor unit of the air conditioner. [0004] The Boost type average current method realizes power facto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42F24F11/88F24F11/64
CPCF24F11/64F24F11/88H02M1/4225Y02B70/10
Inventor 韩亚李超
Owner NINGBO AUX ELECTRIC
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