MOTOR DRIVE DEVICE

This motor drive device (1) has: an inverter circuit (3) for driving a motor (2); an inverter control device (4) for controlling the inverter circuit (3); a gate drive power supply (5) for supplying a power supply for driving the inverter circuit (3); a circuit pattern (7) for connecting the inverter circuit (3) and the gate drive power supply (5); a control power supply (8) connected to the circuit pattern (7) and supplying a power supply for driving the inverter control device (4); and a thermal switch (12) connected to the circuit pattern (7) and interrupting the supply of power from the gate drive power supply (5) to the inverter circuit (3) when the temperature of the winding of the motor (2) exceeds a predetermined temperature. 本发明的马达驱动装置(1)具有：逆变器电路(3)，驱动马达(2)；逆变器控制装置(4)，控制逆变器电路(3)；栅极驱动用电源(5)，供给用于驱动逆变器电路(3)的电源；电路图案(7)，用于将逆变器电路(3)与栅极驱动用电源(5)连接；控制电源(8)，与电路图案(7)连接，并供给用于驱动逆变器控制装置(4)的电源；以及热敏开关(12)，与电路图案(7)连接，在马达(2)的绕组的温度超过预先确定的温度的情况下，切断从栅极驱动用电源(5)向逆变器电路(3)的电源供给。