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Motor temperature measurement and overtemperature protection method of drum washing machine

A drum washing machine, motor temperature technology, applied in the direction of thermometers using electric/magnetic elements that are directly sensitive to heat, automatic disconnection emergency protection devices, thermometers, etc., can solve the problems of increasing costs and affecting motor reliability, etc., to achieve Low cost, simple structure, fast effect

Inactive Publication Date: 2012-07-04
WUXI LITTLE SWAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of this, at present, in order to realize the over-temperature protection of the motor, an overheating circuit breaker is connected in series in the stator coil, which not only increases the cost but also affects the reliability of the motor

Method used

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  • Motor temperature measurement and overtemperature protection method of drum washing machine
  • Motor temperature measurement and overtemperature protection method of drum washing machine
  • Motor temperature measurement and overtemperature protection method of drum washing machine

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Experimental program
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Embodiment Construction

[0016] Such as figure 1 , with the output speed of the main controller Correspondingly, the drive controller outputs a DC voltage V1 for temperature measurement, and delays for a period of time to allow the voltage to stabilize before performing measurement calculations.

[0017] Such as figure 2 specific process. When the washing machine motor is not running, it is in the standby state, and the temperature monitoring and protection of the motor are ready. At the same time as the whole process starts, the main controller first receives the user's instruction: run the motor, and the received motor speed is , to instruct the motor controller to first output DC voltage V1. The DC voltage here is determined according to the current and the resistance of the motor coil. The requirement is that the current I used to participate in the calculation is 1.4~1.8A. , the output DC voltage V1 is 5~7V.

[0018] Delay 80~100ms, wait for the voltage to stabilize, and then obtain the cu...

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Abstract

The invention discloses a motor temperature measurement and overtemperature protection method of a drum washing machine. The motor temperature measurement and overtemperature protection method comprises the following steps of: after receiving speed output, a motor drive controller first outputs a direct-current voltage and stabilizes the direct-current voltage for a certain time; a stator current is acquired by adopting a current sampling circuit; a stator resistance R is calculated by the Ohm's law; and a stator temperature T is calculated with a formula and judging whether overtemperature happens. The motor temperature measurement and overtemperature protection method disclosed by the invention has the advantages of no need of extra equipment, low cost, simple structure, short whole measurement and judgment, high temperature and capability of effectively protecting a motor.

Description

technical field [0001] The invention relates to a drum washing machine, in particular to a motor protection method for a drum washing machine. Background technique [0002] The drum washing machine includes a cabinet, a machine door, a water tub, a clothes tub and a control system. The door is located on the front or top of the cabinet for opening and closing. The water tub is fixed in the cabinet through a support mechanism and a suspension mechanism. The clothes tub is installed on Inside the water tub, the motor and the clothes tub are driven by belts and pulleys, the motor driver is used to drive the motor, and the main controller system is used to control the entire working process of the washing machine. [0003] The working environment of the motor of the drum washing machine is relatively harsh. It often works in a high-temperature and high-humidity environment, and the load condition is complicated, which is easy to cause failure due to overheating. The commonly us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/08H02H5/04G01K7/16
Inventor 陈定宙徐刚
Owner WUXI LITTLE SWAN CO LTD
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