Motor driving apparatus and method
AssigneeHl Mando Corporation
InventorKwangHyung Lee
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a motor driving apparatus and a method. More specifically, a motor driving apparatus according to the present disclosure includes: an electric motor; an inverter that drives the electric motor using a plurality of high-side switching elements and low-side switching elements; a rotary switch that connects the electric motor and the inverter to each other; and a controller that identifies a switching element in which a malfunction has occurred in a case where a malfunction has occurred in the inverter connected to the electric motor and performs control of the rotary switch such that connection with the identified switching element is cut out, and a switching element not connected to the electric motor is connected.
Claims8
A motor driving apparatus comprising:
- an electric motor;
- an inverter that drives the electric motor, the inverter comprising:
- a first leg that includes a first high-side switching element and a first low-side switching element;
- a second leg that includes a second high-side switching element and a second low-side switching element;
- and
- a third leg that includes a third high-side switching element and a third low-side switching element;
- a rotary switch that connects the electric motor and two legs of among the first leg to the third leg of the inverter to form an H-bridge;
- and
- a controller that identifies a switching element in which a malfunction has occurred in a case where a malfunction has occurred in the inverter connected to the electric motor and performs control of the rotary switch such that connection with the leg having the identified switching element is cut out, and a leg having a switching element not connected to the electric motor among the first leg to the third leg is connected,
- wherein motor control signals generated using a combination of pulse width modulation (PWM) and general-purpose input/output (GPIO) are assigned to printed circuit board (PCB) contact points of the electric motor, and
- wherein, when the leg is changed in accordance with rotation of the rotary switch, the motor control signal set in each leg is changed to maintain an existing direction in which the electric motor has rotated.
A motor driving method comprising:
- detecting a malfunction of an inverter that drives an electric motor;
- identifying a switching element in which a malfunction has occurred among a plurality of switching elements included in the inverter in a case where a malfunction has occurred in the inverter, wherein the inverter comprises a first leg that includes a first high-side switching element and a first low-side switching element, a second leg that includes a second high-side switching element and a second low-side switching element, and a third leg that includes a third high-side switching element and a third low-side switching element;
- and
- performing control of a rotary switch that connects the electric motor and two legs of among the first leg to the third leg of the inverter to form an H-bridge such that connection between a leg having the identified switching element and the electric motor is cut out, and a leg having a switching element not connected to the electric motor is connected to the electric motor,
- wherein motor control signals generated using a combination of pulse width modulation (PWM) and general-purpose input/output (GPIO) are assigned to printed circuit board (PCB) contact points of the electric motor, and
- wherein, when the leg is changed in accordance with rotation of the rotary switch, the motor control signal set in each leg is changed to maintain an existing direction in which the electric motor has rotated.
Dependencies are inferred from the claim text.