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Motor failure control method and device

A failure control and capacitance technology, applied in emergency protection circuit devices, control of multiple AC motors, electrical components, etc., can solve the problems of air conditioning failure, hysteresis and danger of system parameters such as tube temperature changes, and achieve timely detection. Effect

Active Publication Date: 2016-05-11
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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Problems solved by technology

[0004] (1) Due to the inherent hysteresis phenomenon in the change of systemic parameters such as tube temperature, that is, there will be a delay time between the failure of the motor and the abnormality of the system, so when the motor is abnormal, there is a danger that the system cannot start the protection action in time
[0005] (2) In the case of dual motors used in parallel, if one of the motors fails, the system can continue to operate normally for a period of time by adjusting the motor speed, but because the system cannot take this action, the air conditioner may immediately fail as a whole
[0006] (3) Since the system fails to report the fault source, it increases the burden of troubleshooting for air-conditioning maintenance

Method used

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0028] Please refer to figure 1 , the present invention provides a motor failure control method, in particular, can be used in air conditioning systems, more particularly, the motor is a non-feedback AC motor, for example, mainly tap motors and external rotor AC motors and the like.

[0029] In one embodiment, the method includes: obtaining the current detection signal of the motor; judging whether there is a motor failure according to the current detection signal; The system can continue to operate normally. Preferably, the failure of the motor includes a locked rotor, or a short circuit, or an open circuit.

[0030] In the above technical solution, the power supply circuit of each motor is provided with a current detection device to monitor the running state of the motor. The pres...

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PUM

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Abstract

The invention discloses a motor failure control method and device. The motor failure control method comprises: obtaining the current detection signal of a motor; determining whether the motor fails according to the current detection signal; and if the motor fails, maintaining supplying power to a normal motor at the same time of cutting power supply for the failed motor. The motor failure control device can timely detect failure when an alternating current motor fails, timely perform corresponding protection motion to guarantee system continuous normal operation, or timely perform halt protection to timely detect and identify motor failure.

Description

technical field [0001] The invention relates to the field of motor protection, in particular to a motor failure control method and device. Background technique [0002] In the existing air-conditioning technology, the AC motor usually adopts a non-feedback open-loop control, that is, when the motor is abnormal (such as stalled, short circuit, open circuit), the control system cannot directly detect and judge the abnormal situation of the motor. Changes in systemic parameters such as temperature determine that the whole machine system is abnormal, and thus make a rough response strategy of shutting down or not dealing with it. [0003] Therefore, the air conditioner in the prior art has the following problems with regard to motor abnormality: [0004] (1) Due to the inherent hysteresis phenomenon in the change of systemic parameters such as tube temperature, that is, there will be a delay time between the failure of the motor and the abnormality of the system, so when the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/08H02P5/74
CPCH02H7/0822H02P5/74
Inventor 林坚生王铭坤姚新祥夏光辉
Owner GREE ELECTRIC APPLIANCES INC
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