Motor drive device

A motor drive device comprising:

• a first switcher configured to switch to connect one terminal among a first terminal and a second terminal of a motor to a first power source or a reference potential point;
• a second switcher configured to switch to connect another terminal among the first terminal and the second terminal of the motor to the first power source or the reference potential point;
• a first operation switch operated when the motor is caused to rotate in a first direction;
• a second operation switch operated when the motor is caused to rotate in a second direction;
• a first switching element configured to drive the first switcher;
• a second switching element configured to drive the second switcher;
• a third switching element connected to the second switching element;
• a controller configured to operate the first switching element based on an operation of the first operation switch and operate the second switching element based on an operation of the second operation switch;
• and
• a water ingress detection circuit configured to output a water ingress detection signal in response to detecting water ingress and switch the first switcher and the second switcher by operating the first switching element and the second switching element in accordance with the water ingress detection signal,
• wherein the water ingress detection circuit includes a fourth switching element configured to operate in the presence of water ingress and output the water ingress detection signal;
• wherein one end of the first operation switch is connected to the third switching element and the controller, and another end of the first operation switch is connected to the first power source via the fourth switching element and connected to a second power source,
• wherein, when the first operation switch is operated in the presence of water ingress, the first power source is connected to the third switching element and the third switching element operates the second switching element to rotate the motor in the first direction.