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US 12,756,279 B2Granted
BLDC motor controller
AssigneeHanon Systems
InventorsChung Jae Baek, Byung Kuk Kim, Sung Jun Park
Life of this patent
Estimating the term…
Abstract
The present invention relates to a BLDC motor controller for controlling a BLDC motor, and more particularly, to a BLDC motor controller that separates the ground of a battery power input line and the ground of an emergency operation signal line for an operation in an emergency operation mode, thereby preventing an abnormal operation in the emergency operation mode caused by noise.
Claims9
A BLDC motor controller for a vehicle cooling fan, the BLDC motor controller comprising:
- a microcontroller unit configured to control a gate driver by receiving an operation signal through an operation signal line;
- a gate driver configured to turn on or off a MOSFET in response to the operation signal of the microcontroller unit and supply an electric current for operating the motor;
- the MOSFET configured to switch a drive current of the gate driver to the motor and transmit the drive current;
- a battery power input line configured to transmit battery power to the microcontroller unit, the gate driver, and the MOSFET when a vehicle is turned on;
- the operation signal line configured to transmit a motor operation signal, which is transmitted from an engine control unit of the vehicle, to the microcontroller unit;
- and
- an emergency operation signal line configured to operate the motor by transmitting an emergency operation signal directly to the gate driver when the motor operation signal is not transmitted to the microcontroller unit under a predetermined condition,
- wherein the ground of the battery power input line and the ground of the emergency operation signal line are separated from each other.
5 more elements
Dependencies are inferred from the claim text.