APPARATUS AND METHOD FOR INITIALLY DRIVING A SENSORLESS BLDC MOTOR

摘要

Provided is a sensorless BLDC motor apparatus for providing a drive current allowing the rotor of the BLDC motor to be aligned in a predetermined direction during an initial position setting section (or for a first period of time), and providing a drive current allowing a frequency thereof to be varied at predetermined time intervals so as to accelerate the rotational speed of the BLDC motor during an open loop section (or for a second period of time), and a method using the same.

主权项

1. An apparatus for driving a brushless DC motor (BLDC motor), the apparatus comprising:
an inverter configured to supply a motor drive current to a motor according to a control signal; and a controller configured to generate the control signal, wherein, when initially driving the motor, the controller generates a first control signal for a first period of time and generates a second control signal for a second period of time, the second period of time being after the first period of time, and wherein the first control signal during the first period of time provides a first drive current to align the motor in a prescribed direction and the second control signal during the second period of time provides a second drive current to accelerate the rotational speed of the motor, a frequency of the second drive current being varied at prescribed time intervals within the second period of time.