PFC circuit control method, device and air conditioner
A circuit control and air conditioner technology, applied in the direction of output power conversion device, electrical components, high-efficiency power electronic conversion, etc., can solve the problem of unable to adjust the output of PFC circuit
Active Publication Date: 2020-11-03
NINGBO AUX ELECTRIC +1
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- Application Information
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Problems solved by technology
[0003] In view of this, the present application provides a PFC circuit control method, device and air conditioner to improve the problem that the existing air conditioner cannot adjust the output of the PFC circuit according to the load demand
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[0025] 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.
[0026] Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention. ...
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The invention provides a PFC circuit control method and device and an air conditioner, the PFC circuit control method is applied to the air conditioner, and the PFC circuit control method comprises the steps of determining the required voltage of a PFC circuit post-stage load; determining a target voltage of the PFC circuit according to the required voltage of the load and a preset safety voltagerange; and adjusting the PFC circuit to enable the output voltage of the PFC circuit to reach the target voltage. According to the PFC circuit control method provided by the invention, firstly, by determining the required voltage of the PFC post-stage load; adaptively determining the target voltage of the PFC circuit; regulating the PFC circuit, the output voltage of the PFC circuit reaches the target voltage, so that the PFC circuit can be adjusted according to the requirement of a load, on one hand, a post-stage circuit can be ensured to work in a proper voltage environment, and on the other hand, the post-stage circuit can be prevented from being in a high-voltage environment for a long time to form protection for the post-stage circuit.
Description
technical field [0001] The present application relates to the technical field of air conditioners, in particular to a PFC circuit control method and device and an air conditioner. Background technique [0002] Inverter air conditioners are more widely used than fixed-speed air conditioners. Inverter air conditioners use magnetic synchronous compressors. The speed of the compressors is adjustable and the efficiency is high. Control the PFC boost, but it is difficult to determine the level to which the PFC voltage rises. If the PFC voltage is too low, the compressor frequency will not be able to run at high frequencies, which cannot meet user needs; if the PFC voltage is too high, it will damage the electrolytic capacitor The life will be affected, and the higher the voltage, the more likely it will cause the failure of the electrolytic capacitor. In summary, the voltage of the PFC circuit cannot be reasonably determined now, and the output of the PFC circuit cannot be adjuste...
Claims
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IPC IPC(8): H02M1/42
CPCH02M1/4225Y02B70/10
Inventor 陈红李发顺许真鑫
Owner NINGBO AUX ELECTRIC