KR970001681A - Motor driving circuit protection device and method of washing machine - Google Patents

Abstract

The present invention relates to an apparatus and a method for protecting a motor driving circuit of a washing machine, and to provide an apparatus and method for protecting a motor driving circuit of a washing machine suitable for determining whether the motor driving circuit is operated and protecting the motor driving circuit from an overcurrent.

To this end, the motor driving circuit protection device and method of the washing machine according to the present invention include a microcomputer for controlling the entire system, a first transistor whose operating state is determined by a control signal of the microcomputer, and the ON / OFF characteristics of the first transistor. In a motor driving circuit of a washing machine having a triac to determine whether or not the motor is rotated through the triac, and a power supply unit for supplying power required to rotate the motor through the triac, detecting whether the motor driving circuit is operated. and the when the motor driving circuit protection method of the washing machine of the present invention, characterized by yirueojim by further provided with parts of detecting the motor driving circuit to protect the motor driving circuit due to the over-current is applied to the control signal to the P ₁ terminal of the microcomputer P ₂ terminal The first step of detecting the input signal to determine whether the motor driving circuit is defective, the bad signal of the motor driving circuit If not, the second step of detecting the input signal of the Hall sensor to determine whether the motor itself is defective, if the input signal of the Hall sensor is present, the normal operation proceeds, if the motor failure signal is generated, the P ₁ terminal of the microcomputer And a third step of switching the output signal to cut off the motor power.

Description

Motor driving circuit protection device and method of washing machine

Since this is an open matter, no full text was included.

Figure 4 is a circuit diagram showing a motor driving circuit protection device of the washing machine of the present invention, Figure 5 is a flow chart showing a method of protecting the motor drive circuit of the washing machine according to the present invention, Figure 6 is an input and output waveform diagram of each part according to the present invention .

Claims (3)

A microcomputer for controlling the entire system, a first transistor whose operating state is determined by a control signal of the microcomputer, and a triac for determining whether the motor is rotated by determining an operating state according to on / off characteristics of the first transistor; And a motor driving circuit of a washing machine having a power supply unit for supplying power required for motor rotation through the triac, wherein the motor driving circuit detecting unit detects operation of the motor driving circuit and protects the motor driving circuit due to overcurrent. Motor driving circuit protection device for a washing machine, characterized in that further comprises. The photocoupler of claim 1, wherein the motor driving circuit detector comprises: a photocoupler including a transistor coupled to an emitter terminal of the first transistor, the anode of the light emitting diode being operated to receive light emitted by the light emitting diode, and the photocoupler; and the microcomputer of the P ₂ protecting device to the motor drive circuit of the washing machine, characterized by configured by comprising a power supply voltage terminal are connected in parallel across the terminals. When the control signal is applied to the P ₁ terminal of the microcomputer, the first step of detecting an input signal of the P ₂ terminal to determine whether the motor driving circuit is defective or not, and if the bad signal of the motor driving circuit is not generated, inputs the input signal of the hall sensor. In the second step of detecting and determining whether the motor itself is defective, if the input signal of the hall sensor is present, normal operation is performed, and if a motor failure signal is generated, the motor power is cut off by switching the output signal of the P ₁ terminal of the microcomputer. Motor driving circuit protection method of a washing machine comprising a third step. ※ Note: The disclosure is based on the initial application.