Flywheel rotating speed control device and method based on linear Hall sensors

A hall sensor, linear hall technology, applied in the direction of controlling electromechanical transmission, control system, control generator, etc., can solve the problem of insufficient efficiency, and achieve the requirements of simple structure, cost saving, and reduction of storage and computing resources. Effect

Active Publication Date: 2016-07-27
SHANGHAI XINYUE METER FACTORY
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Problems solved by technology

[0003] The technical problem solved by the present invention is that in the existing DC brushless motor, the detection method of the position and speed of the flywheel is not efficient enough: in order to solve the problem, the present invention provides a flywheel speed control device and method based on a linear Hall sensor

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  • Flywheel rotating speed control device and method based on linear Hall sensors
  • Flywheel rotating speed control device and method based on linear Hall sensors
  • Flywheel rotating speed control device and method based on linear Hall sensors

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Embodiment Construction

[0027] Hereinafter, the present invention will be further described in conjunction with the drawings and embodiments.

[0028] Such as figure 1 As shown, the flywheel speed control device based on the linear Hall sensor provided by the present invention includes: a first linear Hall sensor 1, a second linear Hall sensor 2, a third linear Hall sensor 3 and a DC brushless motor 13 (see image 3 ); three linear Hall sensors space 120 Symmetrically installed on the stator of the DC brushless motor, the flywheel is the rotor of the DC brushless motor; the DC brushless motor has three-phase outputs of A, B, and C, and the three linear Hall sensors are respectively proportional to the three output counter electromotive force. 30 electrical angle. exist figure 1 In the illustrated embodiment, a DC brushless motor with 7 pairs of poles is used, and in other embodiments, a DC brushless motor can be selected according to application requirements. figure 1 Among them, A+ is the pos...

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Abstract

The invention discloses a flywheel rotating speed control device and method based on linear Hall sensors. Three-phase linear Hall sensors are installed on a stator of a flywheel direct-current brushless motor in a spatial 120-degree symmetrical distribution mode to acquire three-phase analog sinusoidal signals proportional to the flywheel air gap magnetic field intensity, and position and speed information of a flywheel can be obtained after mathematical calculation. Compared with a photoelectric coder used in the traditional flywheel design, the device for measuring the position and the speed of the flywheel by adopting the three-phase linear Hall sensors has the advantages that the structure is simple and the cost is reduced; moreover, the three-phase analog sinusoidal signals and three-phase counter electromotive forces have a consistent corresponding relation, and a magnetic field directional control algorithm capable of directly generating a phase current command in a static coordinate system without mutual transformation between the static coordinate system and a rotating coordinate system is derived using the corresponding relation, so that high-efficiency driving of the motor can be realized, and the requirements for storage and calculation resources are reduced. The control algorithm applied to the rotating speed control of the flywheel achieves good control effect and has high popularization value.

Description

technical field [0001] The invention relates to the field of DC brushless motors, in particular to a flywheel speed control device and method based on a linear Hall sensor. Background technique [0002] In a flywheel speed control system using a brushless DC motor, a full-bridge drive circuit is generally used to control the on and off of the three-phase winding current of the motor, thereby changing the magnetic field to control the flywheel speed. In order to achieve high-precision control of the flywheel speed, it is necessary to collect the flywheel position and speed information in real time, and use these feedback information to control the magnitude and direction of the motor stator current. In the existing DC brushless motor control, the position and speed detection of the flywheel is generally realized by installing three switch Hall sensors and a certain precision incremental photoelectric encoder on the motor body. The control device has a large structure and lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/13H02P21/14
CPCY02P80/10
Inventor 嵩甲晨李结冻侯建文李延宝刘珊珊孙建亮陈长春
Owner SHANGHAI XINYUE METER FACTORY
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