Vehicle electric braking device and method of controlling the same

A method of controlling a vehicle electric braking device comprising a wheel brake which includes:

• a motor which has two sets of independent coil windings, a first coil winding and a second coil winding, and drives a braking mechanism of wheels of a vehicle;
• a first controller which is connected to the first coil winding of the motor and controls the motor;
• and a second controller which is connected to the second coil winding of the motor and controls the motor, the method comprising the steps of:
• turning OFF a first power source relay circuit and a second power source relay circuit, turning ON a third power source relay circuit and a fourth power source relay circuit, feeding power from a third power source to the first controller and the second controller, and outputting driving indication of turning ON to a first inverter circuit of the first controller and driving indication of turning ON to a second inverter circuit of the second controller, when no failure occurs in the wheel brake;
• turning OFF the first power source relay circuit, the second power source relay circuit, and the third power source relay circuit, keeping the fourth power source relay circuit ON continuously, turning OFF driving indication to the first inverter circuit of the first controller, and keeping driving indication to the second inverter circuit of the second controller ON continuously, when a failure occurs in the first inverter circuit of the first controller;
• turning OFF the first power source relay circuit, the second power source relay circuit, and the fourth power source relay circuit, keeping the third power source relay circuit ON continuously, turning OFF driving indication to the second inverter circuit of the second controller, and keeping driving indication to the first inverter circuit of the first controller ON continuously, when a failure occurs in the second inverter circuit of the second controller;
• turning OFF the first power source relay circuit, the second power source relay circuit, and the third power source relay circuit, keeping the fourth power source relay circuit ON continuously, turning OFF driving indication to the first inverter circuit of the first controller, and keeping driving indication to the second inverter circuit of the second controller ON continuously, when a failure occurs in the motor on the first inverter circuit side of the first controller;
• and
• turning OFF the first power source relay circuit, the second power source relay circuit, and the fourth power source relay circuit, keeping the third power source relay circuit ON continuously, turning OFF driving indication to the second inverter circuit of the second controller, and keeping driving indication to the first inverter circuit of the first controller ON continuously, when a failure occurs in the motor on the second inverter circuit side of the second controller.

A method of controlling a vehicle electric braking device comprising a wheel brake which includes:

• a motor which has two sets of independent coil windings, a first coil winding and a second coil winding, and drives a braking mechanism of wheels of a vehicle;
• a first controller which is connected to the first coil winding of the motor and controls the motor;
• and a second controller which is connected to the second coil winding of the motor and controls the motor, the method comprising the steps of:
• turning ON a first power source relay circuit and a second power source relay circuit, turning OFF a third power source relay circuit and a fourth power source relay circuit, feeding power from a first power source to the first controller, feeding power from a second power source to the second controller, and outputting driving indication of turning ON to a first inverter circuit of the first controller and driving indication of turning ON to a second inverter circuit of the second controller, when no failure occurs in the wheel brake;
• turning OFF the first power source relay circuit, the third power source relay circuit, and the fourth power source relay circuit, keeping the second power source relay circuit ON continuously, turning OFF driving indication to the first inverter circuit of the first controller, and keeping driving indication to the second inverter circuit of the second controller ON continuously, when a failure occurs in the first inverter circuit of the first controller;
• turning OFF the second power source relay circuit, the third power source relay circuit, and the fourth power source relay circuit, keeping the first power source relay circuit ON continuously, turning OFF driving indication to the second inverter circuit of the second controller, and keeping driving indication to the first inverter circuit of the first controller ON continuously, when a failure occurs in the second inverter circuit of the second controller;
• turning OFF the first power source relay circuit, the third power source relay circuit, and the fourth power source relay circuit, keeping the second power source relay circuit ON continuously, turning OFF driving indication to the first inverter circuit of the first controller, and keeping driving indication to the second inverter circuit of the second controller ON continuously, when a failure occurs in the motor on the first inverter circuit side of the first controller;
• and
• turning OFF the second power source relay circuit, the third power source relay circuit, and the fourth power source relay circuit, keeping the first power source relay circuit ON continuously, turning OFF driving indication to the second inverter circuit of the second controller, and keeping driving indication to the first inverter circuit of the first controller ON continuously, when a failure occurs in the motor on the second inverter circuit side of the second controller.

A method of controlling a vehicle electric braking device comprising a wheel brake which includes:

• a motor which has two sets of independent coil windings, a first coil winding and a second coil winding, and drives a braking mechanism of wheels of a vehicle;
• a first controller which is connected to the first coil winding of the motor and controls the motor;
• and a second controller which is connected to the second coil winding of the motor and controls the motor, the method comprising the steps of:
• turning ON a first power source relay circuit, a second power source relay circuit, a third power source relay circuit, and a fourth power source relay circuit, feeding power from a third power source to the first control unit, the second control unit, the third power source relay circuit, and the fourth power source relay circuit, and outputting driving indication of turning ON to a first inverter circuit of the first controller and driving indication of turning ON to a second inverter circuit of the second controller, when no failure occurs in the wheel brake;
• turning OFF the first power source relay circuit and the third power source relay circuit, keeping the second power source relay circuit and the fourth power source relay circuit ON continuously, turning OFF driving indication to the first inverter circuit of the first controller, and keeping driving indication to the second inverter circuit of the second controller ON continuously, when a failure occurs in the first inverter circuit of the first controller;
• turning OFF the second power source relay circuit and the fourth power source relay circuit, keeping the first power source relay circuit and the third power source relay circuit ON continuously, turning OFF driving indication to the second inverter circuit of the second controller, and keeping driving indication to the first inverter circuit of the first controller ON continuously, when a failure occurs in the second inverter circuit of the second controller;
• turning OFF the first power source relay circuit and the third power source relay circuit, keeping the second power source relay circuit and the fourth power source relay circuit ON continuously, turning OFF driving indication to the first inverter circuit of the first controller, and keeping driving indication to the second inverter circuit of the second controller ON continuously, when a failure occurs in the motor on the first inverter circuit side of the first controller;
• and
• turning OFF the second power source relay circuit and the fourth power source relay circuit, keeping the first power source relay circuit and the third power source relay circuit ON continuously, turning OFF driving indication to the second inverter circuit of the second controller, and keeping driving indication to the first inverter circuit of the first controller ON continuously, when a failure occurs in the motor on the second inverter circuit side of the second controller.