Permanent magnet synchronous linear motor control method and system

A permanent magnet synchronous linear and motor control technology, applied in the control system, vector control system, motor generator control, etc., can solve the problem that the control stability cannot be guaranteed

Active Publication Date: 2022-02-18
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in the research, the parameters of stator resistance and load torque are regarded as known or unknown constants. However, in actual working conditions, the parameters of stator resistance and load torque change in real time, and the corresponding derivatives should not be equal to zero. Therefore When the motor system is faced with time-varying parameters and external disturbances, the existing control system cannot guarantee its control stability

Method used

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  • Permanent magnet synchronous linear motor control method and system
  • Permanent magnet synchronous linear motor control method and system
  • Permanent magnet synchronous linear motor control method and system

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Embodiment

[0244] Robust theoretical analysis and algorithm verification of the constructed observer and controller: the simulation parameters of the motor are set to L d =0.615H, L q =0.575H, Ψ f =0.1614Wb, m=6kg, τ=16mm, p=3, v * =300mm / s, B=1.2N·s·m -1 ; The observer parameter is set to ρ 1 = 400, ρ 2 =500; the controller parameter is set to k 0 =5,k 1 =0.8; the initial value of the state variable in the simulation is selected as:

[0245] x (0) =[x 11 ,x 12 ,x 13 ,x 21 ,x 22 ,x 23 ,x 24 ]

[0246] =[3,1.45,0,20,12,9,1]

[0247] R in this example s , f v is time-varying, assuming:

[0248]

[0249]Algorithm simulation results: such as figure 2 The tracking effect and tracking error of the motor speed are given. From the simulation results, the controller enables the speed to track the reference speed within a limited time, reaching 300mm / s, and the tracking error converges to zero. image 3 The observation effect of velocity is given. From the enlarged partial...

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Abstract

The invention discloses a permanent magnet synchronous linear motor control method and system. The method comprises the following steps: establishing a mathematical model of a permanent magnet synchronous linear motor under a two-phase rotating coordinate system; establishing an expansion system by taking the stator resistance and the total disturbance of the mechanical system as an expansion state; dividing the expansion system into interconnected subsystems, and constructing an interconnected observer based on a Kalman filter for each subsystem, wherein the linear time-varying part of the interconnected observer meets a continuous excitation condition, and the observation error is converged to zero; and designing a controller according to the unmeasurable state quantity in a back-stepping recursion manner, so that the controller controls the motor speed tracking expected value according to the output current of the motor and the input voltage for controlling the motor, and the speed tracking control of the motor is realized. When the motor system is confronted with parameter time varying and external disturbance, the stability of the motor system is ensured, and the influence caused by interference in servo control is weakened.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a permanent magnet synchronous linear motor control method and system. Background technique [0002] In the existing control technology, a sensorless speed control for a built-in permanent magnet synchronous motor is designed by combining a robust reverse thrust controller with integral action and an adaptive interconnected observer. To eliminate mechanical sensors, an automatic Adapted interconnected observers to estimate rotor position and velocity. However, in the research, the stator resistance and load torque parameters are regarded as known or unknown constants. However, in actual working conditions, the stator resistance and load torque parameters change in real time, and the corresponding derivatives should not be equal to zero. Therefore When the motor system is faced with time-varying parameters and external disturbances, the existing control systems cannot guara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/13H02P21/14H02P25/064
CPCH02P21/13H02P21/14H02P25/064
Inventor 武康林颖
Owner JIANGNAN UNIV
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