A Commutation Method of Brushless DC Motor Based on Digital Hall Sensor

A brush DC motor and Hall sensor technology, which is applied in the field of commutation of brushless DC motors based on digital Hall sensors, can solve problems such as commutation disorder, and achieve the effect of improving real-time performance and wide applicability

Active Publication Date: 2021-05-04
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0005] The above-mentioned Hall commutation is mainly used to improve the stability of detection and the effectiveness of fault handling, and has a better effect on the commutation during the operation of the motor rotor. It does not involve the state of the stator of the motor. When the stator of the motor rotates , using the current motor commutation method, after starting the motor rotor, if the difference between the rotor and the fixed speed of the motor becomes smaller, commutation disorder will occur

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  • A Commutation Method of Brushless DC Motor Based on Digital Hall Sensor
  • A Commutation Method of Brushless DC Motor Based on Digital Hall Sensor
  • A Commutation Method of Brushless DC Motor Based on Digital Hall Sensor

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Embodiment Construction

[0032] The experimental platform of the brushless DC motor commutation method based on the digital Hall sensor of the present invention includes a high-speed turntable, an elastic body and a torque motor. The projectile is equipped with a brushless DC motor, and the high-speed turntable drives the projectile to rotate counterclockwise. The arm of the torque motor is fixed with the rotor of the brushless DC motor, and the torque motor drives the rotor of the brushless DC motor to rotate clockwise. . After the high-speed turntable and the torque motor rotate at 5 Hz clockwise and 5 Hz counterclockwise respectively, the brushless DC motor is started, and the rotor of the brushless DC motor can be reduced to a certain speed according to the commutation method of the present invention. Realize the starting and control of the brushless DC motor in this special state.

[0033] The brushless DC motor includes three parts: a motor body, a commutation circuit and three position sensors...

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Abstract

The invention discloses a brushless DC motor commutation method based on a digital Hall sensor. First, the speed difference between the rotor and the stator of the brushless DC motor reaches 10 Hz, and then the timer in the controller is used to capture the three-phase Hall control method. Word, then test the three-phase Hall control word, start the motor, and then enter the loop, when the controller detects the jump edge of the three-phase Hall, it will commutate the motor according to the set model, and finally realize the speed control of the motor . The invention can start the motor when the stator is rotating, make the motor commutate in the correct phase sequence, and control the speed of the motor. The invention has wide applicability and can be applied to brushless DC motors working in special environments.

Description

technical field [0001] The invention relates to the field of brushless DC motor control, in particular to a brushless DC motor commutation method based on digital Hall sensors. Background technique [0002] Brushless DC motors are developed from brushed DC motors. Compared with brushed motors, brushless DC motors have simple structure, large output, and good speed regulation performance. Therefore, brushless DC motors have been widely used in industrial fields. In order to improve the commutation method, in recent years, domestic research institutions have successively developed control methods based on different hardware structures and software programming, including designing the installation position of the Hall sensor and designing the execution process of the software. [0003] The patent application number is 201510724513.1, which proposes "A Hall Sensor Control Algorithm for Brushless DC Motor", which adopts the installation method with a difference of 120° between ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/16
CPCH02P6/16H02P2207/05
Inventor 贾方秀许鹏飞李雨辰曹阳郭闯唐伟黄盼姜勋殷婷婷
Owner NANJING UNIV OF SCI & TECH
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