Brushless DC motor direct torque control system and control method

A direct torque control, brushed DC motor technology, applied in control systems, vector control systems, motor generator control and other directions, can solve problems such as complex systems and unfavorable engineering implementation.

Inactive Publication Date: 2016-08-10
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent application with the publication number CN 101702607A sets the rotor induction flux linkage reference and the stator armature reaction flux linkage reference respectively, and then obtains the stator flux linkage vector

Method used

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  • Brushless DC motor direct torque control system and control method
  • Brushless DC motor direct torque control system and control method
  • Brushless DC motor direct torque control system and control method

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Embodiment Construction

[0102] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0103] Such as figure 1 As shown, a brushless DC motor direct torque control system, including photoelectric encoder, stator current and terminal voltage detection circuit, speed calculator, speed error comparator, speed regulator, flux observer, flux error comparison device, flux hysteresis comparator, torque observer, torque error comparator, torque hysteresis comparator, PWM controller and three-phase bridge inverter circuit, the photoelectric encoder is installed in the brushless DC motor On the rotor, it is used to collect the position information of the rotor. The output end of the photoelectric encoder is connected to the input end of the speed calculator, the negative input end of the speed error comparator is connected to the output end of the speed comparator, and the positive input end of the speed error comparator Input the ref...

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Abstract

The invention discloses a brushless direct current motor direct torque control system and control method, the system includes a photoelectric encoder, a stator current and terminal voltage detection circuit, a speed calculator, a speed error comparator, a speed regulator, and a flux linkage observer , Flux linkage error comparator, flux linkage hysteresis comparator, torque observer, torque error comparator, torque hysteresis comparator, PWM controller and three-phase bridge inverter circuit. The photoelectric encoder collects the position information of the motor rotor, calculates the actual speed according to the rotor position information, calculates the given value of the stator flux linkage according to the rotor position information and the reference torque, and collects the three-phase current and terminal voltage of the stator to calculate the actual electromagnetic torque And the actual stator flux, the PWM controller generates a voltage vector according to the torque error and the flux error, and drives the inverter circuit through the voltage vector to realize the stable operation of the motor. The invention does not need to calculate the flux linkage in real time, simplifies the system program, and improves the control efficiency.

Description

technical field [0001] The invention belongs to the technical field of brushless direct current motor control, and in particular relates to a direct torque control system and control method of a brushless direct current motor. Background technique [0002] Brushless DC motor is a new type of DC motor developed on the basis of traditional DC motors. It has the advantages of simple control, high efficiency, good dynamic response, and high reliability. At present, the application of brushless DC motors has developed rapidly from the initial military industry to the fields of aerospace, information, production, medical treatment and industrial automation. [0003] Direct torque control is a high-performance motor speed regulation technology. It abandons the decoupling control idea of ​​vector control and uses the direct closed-loop of motor torque flux to obtain fast torque response and excellent control performance. Induction motors and permanent magnet synchronous motors have...

Claims

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Application Information

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IPC IPC(8): H02P21/30
Inventor 余莉孙加伟芮元栋刘锐刘德
Owner NANJING UNIV OF INFORMATION SCI & TECH
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