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Control system for brushless direct current motor free of position sensor

A brushless DC motor and control system technology, applied in the direction of a single motor speed/torque control, electronic commutator, etc., can solve the problems of complex brushless DC motor control system, difficult to achieve full digital control, etc., to achieve speed regulation accuracy Good, highly integrated effect

Inactive Publication Date: 2015-11-18
苏州南光电子科技有限公司
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  • Abstract
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Problems solved by technology

[0005] For example, the brushless DC motor control system with the application number "201320099638.6" belongs to the field of motor control. This utility model solves the problem that the traditional brushless DC motor control system with many kinds of interface devices attached to the single chip microcomputer is complicated, and it is difficult to realize the control system from the speed loop to the current loop. full digital control

Method used

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  • Control system for brushless direct current motor free of position sensor

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0024] Such as figure 1 As shown, a position sensorless brushless DC motor control system includes a brushless DC motor, and a motor speed detection module, an A / D conversion module, a back EMF overdetection circuit, and a micro-controller are arranged on the brushless DC motor A device module, a display module, a speed regulation module, a current regulation module, a PWM regulator, the motor speed detection module is connected to the back EMF over-detection circuit through the A / D conversion module, the back EMF over-detection circuit, the display module, the speed The adjustment module and the current adjustment module are respectively connected to corresponding ports of the microcontroller module, and the current adjustment module and the speed adjustment module are respectively connected to the PWM regulator;

[0025] Among them, the motor sp...

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Abstract

The invention discloses a control system for a brushless direct current motor free of a position sensor. The control system comprises the brushless direct current motor, wherein a motor rotating speed detection module, an analogue / digital (A / D) conversion module, a counter potential zero-cross detection circuit, a microcontroller module, a display module, a rotating speed adjusting module, a current adjusting module and a pulse-width modulator (PWM) are arranged on the brushless direct current motor. With an automatic voltage regulation (AVR) series single chip microcomputer as a main control chip, the counter potential zero-cross detection algorithm is improved; accurate calculation of the commutation time of an inverter within a whole-speed range is finished; meanwhile, a voltage and current double-closed loop controller and the PWM are also integrated; precise adjustment on the rotating speed of a control object is realized; the problem of dead halt is avoided; and the demands of electric vehicles on stable operation of a motor controller are met.

Description

technical field [0001] The invention relates to a motor control system, in particular to a position sensorless brushless DC motor control system, which belongs to the field of motor control. Background technique [0002] With the double pressure of environmental pollution and energy crisis increasing, people's demand for electric vehicles is gradually increasing. An electric vehicle usually consists of four major parts: control system, motor and its drive system, battery and vehicle body. Among them, the motor and its drive system directly determine the overall characteristics of the electric vehicle. Compared with other motors, brushless DC motors have gradually become the main choice in the field of electric vehicles due to their obvious advantages in energy density and efficiency. The brushless DC motor without a position sensor avoids the installation of the position sensor, simplifies the structure, saves the cost, and improves the reliability of the motor. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P6/18
Inventor 陈国玉童学权
Owner 苏州南光电子科技有限公司
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