Compressor demagnetization protection circuit and demagnetization protection method and air conditioner
A technology for protecting circuits and compressors, applied to emergency protection circuit devices, electrical components, motor control, etc., can solve problems such as slow response speed and complex circuit structure, and achieve the effect of improving response speed and simplifying circuit structure
Active Publication Date: 2013-05-29
GREE ELECTRIC APPLIANCES INC
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[0005] The main purpose of the present invention is to provide a compressor demagnetization protection circuit, a demagnetization protection method and an air conditioner, so as to solve the problems of slow response speed and complex circuit structure of the compressor demagnetization protection scheme in the prior art
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[0026] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0027] figure 2 is a circuit structure diagram of a compressor demagnetization protection circuit according to an embodiment of the present invention, such as figure 2 As shown, the compressor demagnetization protection circuit of this embodiment includes a current sampling module 10 , a demagnetization protection module 20 and a control module 30 .
[0028] The current sampling module 10 is used to collect the phase current of the compressor.
[0029] The demagnetization protection module 20 is connected with the current sampling module 10, and is used for judging whether the phase current collected by the current sampling module 10 is greater than a set current value, and outputting a jud...
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A compressor demagnetization protection circuit, a demagnetization protection method, and an air conditioner. The compressor demagnetization protection circuit comprises: a current sampling module (10), used to collect a phase current of a compressor; a demagnetization protection module (20), connected to the current sampling module, and used to determine whether the phase current collected by the current sampling module is greater than a set current value, and output a determination signal; and a control module (30), connected to the demagnetization protection module, and used to receive the determination signal, and output a control signal corresponding to the determination signal to the compressor, so as to control the compressor to operate or stop. The compressor demagnetization protection circuit is capable of increasing a response speed of compressor demagnetization protection and simplifying the structure of a demagnetization protection circuit.
Description
technical field [0001] The invention relates to the field of circuits, in particular to a compressor demagnetization protection circuit, a demagnetization protection method and an air conditioner. Background technique [0002] Due to the increase in the price of rare earths, the cost of rare earth permanent magnet motors for frequency conversion air conditioners has risen sharply. In order to reduce costs as much as possible, more and more motors using ferrite magnet materials, namely ferrite permanent magnets Compared with the rare earth permanent magnet motor, the demagnetization current of the ferrite permanent magnet motor is relatively small. If the protection measures are not perfect, it may cause the compressor to demagnetize under the condition of high current, which will cause the performance of the compressor to decline. When the demagnetization is serious It may even damage the compressor. [0003] Although some compressor demagnetization protection schemes have ...
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IPC IPC(8): H02H7/08
CPCH02H7/08H02P29/032
Inventor 郑长春卓森庆游剑波黄滔
Owner GREE ELECTRIC APPLIANCES INC