Motor idling shutdown control circuit and control method

• Main Authors: JIANG WUGANG, LIANG LIYONG
• Format: Patent
• Language: Chinese; English
• Published: 16.06.2020
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention provides a motor idling shutdown control circuit, which comprises a current transformer, a pull-up resistor, a pull-down resistor, a diode, an electrolytic capacitor and a motor controlunit. The current transformer is connected in parallel in an input circuit of the motor. One end of the pull-up resistor, the negative electrode of the electrolytic capacitor and one end of the pull-down resistor are connected with the first output end of the current transformer; the other end of the pull-up resistor and one end of the diode are connected with the second output end of the currenttransformer; the positive electrode of the electrolytic capacitor and one end of the motor control unit are connected with the other end of the diode; the other end of the motor control unit is connected with the other end of the pull-down resistor; and one end of the pull-down resistor is grounded. The invention further provides a control method applying the control circuit. The no-load operationcondition of the motor can