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Motor protection and air conditioner

A motor protection and motor winding technology, applied in emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve the problems of low reliability of motor operation and ensure safety , the effect of reducing heat generation and reducing current

Pending Publication Date: 2018-12-21
GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a motor protection device and an air conditioner that can improve the reliability of the motor while ensuring the safety of the motor to solve the problem of low motor reliability.

Method used

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Embodiment Construction

[0012] In order to make the purpose, technical solutions, and advantages of this application clearer, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the application, and not used to limit the application.

[0013] In one embodiment, a motor protection device is provided, including a current detection circuit (not shown), a load 120, a load control switch 130, and a controller 140. The current detection circuit is connected to the controller 140; the load 120 is connected in series on the power supply line connected to the motor winding 200, and the load control switch 130 is connected in parallel to both ends of the load 120 and connected to the controller 140. The power supply line is a line that connects the motor winding 200 with the power supply terminal, that is, the current connected to the power supply termin...

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Abstract

The present application relates to a motor protection device and an air conditioner. The motor protection device comprises a current detection circuit, a load, a load control switch and a controller.The current detection circuit is connected with the controller. The load is serially connected with a power supply line connected with the motor winding at the power supply end. The load control switch is connected with the controller in parallel at both ends of the load. The current detecting circuit detects the current of the power supply line and sends the feedback value to the controller according to the current of the power supply line. The controller obtains the safety parameter value and the limit parameter value corresponding to the resistance value of the motor winding. When the feedback value is less than the safety parameter value, the controller controls the load control switch to close. When the feedback value is greater than or equal to the safety parameter value and less than the limit parameter value, the control load control switch is turned off; Wherein the safety parameter value is smaller than the limit parameter value. With the present application, the reliabilityof the motor operation can be improved while ensuring safety.

Description

Technical field [0001] This application relates to the technical field of electrical equipment, in particular to a motor protection device and an air conditioner. Background technique [0002] The safety of the motor operation is affected by the working current of the motor windings. If the motor is used in a harsh environment, high current, or when there is an instantaneous high voltage in a thunderstorm, overcurrent is likely to occur, which affects the safety of motor operation. For example, if the current of the motor winding of the air conditioner is too large, it may cause the motor to burn out and the air conditioner cannot work. [0003] The traditional measure to protect the safe operation of the motor is generally to control the cutting off of the current of the motor winding when the current of the motor winding exceeds a set constant value to prevent the motor from burning. Although this method can ensure the safety of the motor, it will frequently cause the motor to s...

Claims

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Application Information

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IPC IPC(8): H02H9/02
CPCH02H9/026
Inventor 陈生李章玉劳家卓杜进
Owner GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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