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Brush DC motor speed regulation method based on least square classified velocity measurement

A brushed DC motor, least squares technology, applied in the field of excitation or armature current control, etc., can solve the problem that the sensorless speed regulation of brushed DC motors has not yet appeared, so as to avoid network learning and adjustment, save hardware costs, The effect of improving speed measurement accuracy

Active Publication Date: 2017-07-14
FUZHOU UNIV
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  • Abstract
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Problems solved by technology

So far, sensorless speed regulation of brushed DC motors using the least square current classifier for speed measurement has not yet appeared.

Method used

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  • Brush DC motor speed regulation method based on least square classified velocity measurement
  • Brush DC motor speed regulation method based on least square classified velocity measurement
  • Brush DC motor speed regulation method based on least square classified velocity measurement

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Embodiment Construction

[0030] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0031] The invention provides a brushed DC motor speed regulation method based on the least squares classification speed measurement. The least squares classification method is used to measure the speed and only needs to extract the current ripple. The speed can completely replace the speed measured by the encoder and feed back to the PID control. The input terminal of the controller realizes sensorless speed regulation. The number of commutation rectifications is fixed when the motor rotates one circle, and the current ripple is generated by the commutation. The current ripple period is equal to the commutation period, and each ripple period has only one peak, so the sampling time is determined, and the number of detected peaks can be used to calculate the speed; A linear classifier based on the least squares method is used to identify p...

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Abstract

The invention relates to a brush DC motor speed regulation method based on least square classified velocity measurement. A least square classified velocity measurement module and PID speed regulation are adopted. The least square classified velocity measurement comprises that a linear least square classifier divides current sequences into a peak sequence and a non-peak sequence, the number of current peaks per revolution is fixed, and the motor speed is calculated. The PID speed regulation is a PID controller adopting speed feedback of the least square classified velocity measurement. The brush DC motor speed regulation method based on the least square classified velocity measurement adopts the least square classifier to identify the current peak, realizes the sensorless PID speed regulation based on the current ripple and the high tracking precision without sensor speed regulation of the brush DC motor, has the characteristics of simplified structure and capability of adapting to the complex environment. The least square classified calculation of offline training is simple.

Description

technical field [0001] The invention relates to a brushed DC motor speed regulation method based on least square classification speed measurement. Background technique [0002] When the brushed DC motor is working, the power supply provides current to the winding of the motor rotor through the brushes and the armature commutator. Under the action of the internal stator magnetic field, the rotor winding starts to rotate and drives the armature commutator to rotate together, so that The direction of the torque generated by the rotor current and the magnetic field is fixed. Due to the problem that the mechanical commutation of the DC motor is not smooth, there are periodic ripples in the current on the armature circuit of the motor. When the winding component passes through the brush from one branch to another branch, the direction of the current in the component changes. Since the motor rotates once, the number of commutations is also certain, and the frequency of the generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/06
CPCH02P7/06
Inventor 黄宴委苏坚坚陈少斌
Owner FUZHOU UNIV
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