A driving control apparatus for car cooperation blower motor be possessed of protection function

摘要

The air conditioner blower motor driving control device having a protection function is to protect the blower motor in the event of an abnormal phenomenon by sensing the current flowing in the blower motor and the temperature of the driving control element. The present invention is connected to the control device of the transistor or FET for controlling the blower motor drive, the temperature sensor that is in contact with the package itself of the control device for sensing the temperature, the emitter or source terminal of the control device flows in series with the blower motor The blower motor is blocked and protected by judging occurrence of abnormal phenomenon such as thermal runaway, overcurrent, overvoltage or undervoltage based on the sensed shunt resistor, the voltage sensing unit for detecting the battery voltage, and the sensed temperature, current and voltage. It consists of a microcomputer for. Therefore, the present invention can be set to a wide temperature range by attaching a temperature sensor to the control element itself, not the heat sink, it is possible to perform a more accurate temperature detection, and to perform a protective function in case of poor contact with the heat sink. To provide. In addition, it provides an effect that can protect the blower motor even in the state of over current, over voltage or under voltage.;Blower motor, control element, temperature sensor, shunt resistor, voltage sensing