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Brushless direct-current motor drive circuit, channel gate and control method

A brushless DC motor and drive circuit technology, applied in the direction of single motor speed/torque control, current controller, electronic commutator, etc., can solve the problems of high cost and complex structure, and achieve low cost and simple structure Effect

Active Publication Date: 2012-07-04
SHENZHEN JIESHUN SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing technology uses a mechanical transmission mechanism with a worm gear and a worm to realize self-locking. Automatic unlocking after environmental power failure to meet fire safety requirements, the cost is relatively high

Method used

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  • Brushless direct-current motor drive circuit, channel gate and control method
  • Brushless direct-current motor drive circuit, channel gate and control method
  • Brushless direct-current motor drive circuit, channel gate and control method

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] see figure 1 , figure 1 It is a structural schematic diagram of the DC brushless motor driving circuit provided by the present invention.

[0024] like figure 1 As shown, the DC brushless motor driving circuit provided by the present invention is connected with the DC brushless motor, and the motor driving circuit includes:

[0025] A position detector 10 , a single chip microcomputer 20 , a level drive conversion chip 30 and a motor current drive de...

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Abstract

The invention discloses a brushless direct-current motor drive circuit, a channel gate and a control method. The brushless direct-current motor drive circuit and the control method can be used in the channel gate; and when the channel gate is in normal use, a singlechip microcomputer is used for determining a position of a rotor according to a received rotor position feedback signal, outputting a corresponding phase control signal according to the position of the rotor so as to control the on and off of a current drive device, and further controlling current of three phases of coils (U, V and W) of the motor, so that the motor is rotated or self-locked, and the on, the off, the self-locking of the channel gate can be controlled. When power failure occurs in the environment, the external control signal is automatically closed, no current flows through the three phases of coils (U, V and W) of the motor, the inner electromagnetism resultant force of the motor is zero, the external force can freely drive the motor to rotate, and the automatic unlocking of the motor can be realized.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a DC brushless motor drive circuit, a channel gate and a control method for the channel gate. Background technique [0002] The channel gate is a device that can automatically open and close the channel. It is widely used in today's industrial society. Closing the channel gate is usually achieved by self-locking. [0003] At present, the self-locking of channel gates on the market basically adopts a worm gear plus a worm for mechanical transmission or through a special mechanism with a toothed electromagnet (electric clutch). [0004] The existing technology uses a mechanical transmission mechanism with a worm gear and a worm to realize self-locking. After the environmental power failure, automatic unlocking is realized to meet the requirements of fire safety, and the cost is relatively high. Contents of the invention [0005] The invention provides a DC brushless motor drive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P6/16H02P6/22H02P6/28
Inventor 唐健陈振荣何荣良
Owner SHENZHEN JIESHUN SCI & TECH IND
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