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Torque impulse balance control method of AC synchronous motor system

An AC synchronous motor, balanced control technology, applied in AC motor control, single motor speed/torque control, motor generator control and other directions, can solve the problems of lag, inaccurate calculation of action time, static error and so on

Active Publication Date: 2016-04-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the technical problem to be solved by the present invention is to propose a torque impulse balance control method for an AC synchronous motor system, which solves the problem of the vector and dynamics selected by the speed loop PI regulator in the prior art in the dynamic process. The inaccurate calculation of the action time of the vector causes problems such as static errors or dynamic lags and overshoots

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  • Torque impulse balance control method of AC synchronous motor system
  • Torque impulse balance control method of AC synchronous motor system
  • Torque impulse balance control method of AC synchronous motor system

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Embodiment Construction

[0033] Structure and working process of the present invention are described further below:

[0034] Such as figure 1 , figure 2 , image 3 As shown, the DC power supply provides the bus voltage for the three-phase full-bridge inverter. The midpoints of the three bridge arms of the three-phase full-bridge inverter are respectively connected to the A, B, and C three-phase armature windings of the motor, and the three-phase armature windings of the AC synchronous motor A rotor position sensor is installed on the rotating shaft, and the rotor position signal θ of the motor is obtained by the rotor position sensor r , the rotor position signal θ of the motor is adjusted by the differential link r Differentiate to obtain the actual rotor synchronous electrical angular frequency ω of the motor e , the desired rotor synchronous angular frequency of the motor is set as with ω e As a difference, the difference obtained is sequentially passed through the proportional integral lin...

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Abstract

The invention discloses a torque impulse balance control method of an AC synchronous motor system. The torque impulse balance control method comprises the following steps of firstly, setting a dynamic rotational speed threshold and a target rotational speed of a motor in advance, acquiring an actual rotational speed of the motor, and calculating the sizes of a real-time electromagnetic torque and a load torque according to the current of a motor armature, the position of a rotor and a speed signal; secondly, judging whether an absolute value of the difference between the actual rotational speed and the target rotational speed is greater than the dynamic rotational speed threshold, set in advance, of the motor or not; and finally, if the absolute value of the difference is greater than or equal to the rotational speed threshold, allowing the system to work in a torque impulse balance control mode so that the rotational speed of the motor can be restrained after being subjected to one-time speed reduction and one-time speed rise, wherein the rotational speed convergence time is the shortest, and the rotational speed dynamic ripple is minimum. By the method, the rotational speed convergence time is the shortest, the rotational speed dynamic ripple is minimum, thus, the rotational speed convergence time and the rotational speed dynamic ripple of an arbitrary load during abrupt changing cannot be affected by proportional integration (PI) parameters of a rotational speed ring, and a speed regulation system has the optimal dynamic performance.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a torque impulse balance control method of an AC synchronous motor system. Background technique [0002] AC synchronous motors, especially rare earth permanent magnet motors, have significant advantages such as simple structure, reliable operation, small size, light weight, low loss, high efficiency, and flexible shapes and sizes. Therefore, the scope of application is extremely wide, covering various fields of aerospace, national defense, industrial and agricultural production and daily life. As permanent magnet synchronous motors are widely used in various fields, the control performance of the permanent magnet synchronous motor control system has higher and higher requirements. It is hoped that the control system can have faster dynamic performance and good steady-state performance. At present, there are two basic control methods for permanent magnet synchro...

Claims

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Application Information

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IPC IPC(8): H02P6/06H02P6/08H02P25/022H02P21/00
CPCH02P6/06H02P6/08H02P21/0003H02P25/024
Inventor 王宇周鹏飞邓智泉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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