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Brushless DC motor current change rate integral equivalent control method

A brushed DC motor, current rate of change technology, applied in the field of value control, can solve problems such as the influence of motor speed control speed PI loop parameters

Active Publication Date: 2017-02-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method solves the problem in the prior art that the speed control of the motor is affected by the parameters of the speed PI loop when the load changes suddenly

Method used

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  • Brushless DC motor current change rate integral equivalent control method
  • Brushless DC motor current change rate integral equivalent control method
  • Brushless DC motor current change rate integral equivalent control method

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Embodiment Construction

[0062] Below in conjunction with the accompanying drawings, the brushless DC motor current change rate integral equivalent control method proposed by the present invention is described in detail:

[0063] figure 2 It is a system block diagram of the integral equivalent control method of the current change rate of the brushless DC motor of the present invention. Such as figure 2 As shown, the control system of the brushless DC motor includes a DC power supply, a three-phase full-bridge inverter, a brushless DC motor, a voltage sensor, a current sensor, and a rotor position sensor. The DC power supply is connected in parallel to the three-phase full-bridge inverter. The two ends of the bus bar of the bridge inverter, the midpoints of the three bridge arms of the three-phase full-bridge inverter are respectively connected to the three output ends of the three-phase windings of the motor, and the midpoints of each bridge arm are connected to the three output ends of the three-p...

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Abstract

The invention brings forward a brushless DC motor current change rate integral equivalent control method. According to the control method, in a dynamic process when motor load torque is changed, according to a principle that double integrals of a phase current change rate are equal, acting time for increasing a vector of phase current amplitude is increased, acting time for decreasing the vector of the phase current amplitude and switching time of different vector time are accurately calculated, and a motor rotating speed can be converged through processes of a slowdown and a speed increase. According to the method, the rotating speed convergence time is the shortest, the rotating speed dynamic ripples are the smallest, the rotating speed convergence time and the rotating speed dynamic ripples of any load abrupt change are enabled not to be influenced by rotating speed ring PI parameters, and a speed regulation system is enabled to have optimal dynamic performance.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to an integral equivalent control method of a brushless DC motor current change rate. Background technique [0002] Compared with the traditional brushed DC motor, the brushless DC motor uses electronic commutation to replace the mechanical commutation of the original DC motor, and reverses the stator and rotor of the original brush DC motor, and the rotor uses permanent magnets, thus eliminating the need for mechanical commutation. Commutator and brush, the stator current is a square wave, and the control is relatively simple. [0003] The common control algorithm of brushless DC motor is 6-beat commutation control. Although this algorithm can realize the closed-loop speed regulation of the motor, the current ripple is relatively large and the torque ripple is relatively large. In order to reduce the torque ripple and improve the steady-state performance of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/28H02P6/06H02P6/17
CPCH02P6/06
Inventor 王宇耿亮肖文妍
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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