KR970031215A - Pulse Width Modulated Brushless Motor - Google Patents

Abstract

The present invention makes it possible to control the duty ratio of the power frequency applied to the motor, thereby miniaturizing the brushless motor with the built-in control circuit and improving the price competitiveness at the same time as minimizing the product using the component. It relates to a brushless motor of the type, which detects the speed of the motor based on the pulse signal detected from the Hall element and calculates the pulse time to determine the variable duty ratio and enable / disable timing of the motor. And a motor unit in which an interface for processing a signal between the microcomputer and the motor unit in which the controller is integrated, and a control unit for controlling the rotational speed of the motor by the variable duty ratio control signal of the microcomputer.

Description

Pulse Width Modulated Brushless Motor

Since this is an open matter, no full text was included.

1 is a block diagram showing a conventional conventional brushless motor control device.

2 is a block diagram showing a brushless motor control apparatus of the present invention.

3 is a detailed circuit diagram showing a control unit provided in the motor.

4 is a brushless motor speed control circuit diagram.

5 is a waveform diagram according to the amplitude modulation of the present invention.

Claims (4)

In a breathless motor with a built-in control circuit comprising a stator, a rotor, and a Hall element that senses a magnetic pole position of the rotor, the motor speed is detected based on a pulse signal detected from the Hall element, and the pulse time is calculated. A pulse width comprising: a microcomputer for determining a variable duty ratio of the rotating speed and enable / disable timing of the microcomputer; and a motor unit having control means for controlling the rotational speed of the motor by the variable duty ratio control signal of the microcomputer. Modulated brushless motor. According to claim 1, wherein the control means for detecting the rotor position in accordance with the signal applied from the Hall element and the pre-current applied to the stator of the motor to detect the interruption of the driving of the motor when overloaded A motor controller comprising a stabilizer controller and driven according to a signal applied from a microcomputer; A power module unit for controlling a current applied to the stator by an output signal of the microcomputer applied through the motor controller; Brushless motor of the pulse width modulation method characterized in that consisting of; an abnormal voltage detection unit for sensing the total current applied to the power module unit and applied to the stabilizer control unit. The abnormal voltage detection unit detects the total current applied to the power module unit through a voltage across the resistor R6 and transfers the detected voltage to the stabilizer control unit through the integration circuits R7 and C3. Pulse width modulated brushless motor characterized in that the. The brushless motor of claim 1, wherein pull-out means including resistors and transistors is provided to pull down the output of the microcomputer to prevent operation of the motor when the initial power is applied. ※ Note: The disclosure is based on the initial application.