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A permanent magnet synchronous linear motor control method and system

A permanent magnet synchronous linear and motor control technology, which is applied in the control system, vector control system, motor generator control and other directions, and can solve problems such as inability to guarantee control stability.

Active Publication Date: 2022-07-12
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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  • A permanent magnet synchronous linear motor control method and system
  • A permanent magnet synchronous linear motor control method and system
  • A permanent magnet synchronous linear motor control method and system

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[0244] Robust theoretical analysis and algorithm verification of the constructed observer and controller: The simulation parameter of the motor is 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 ; Observer parameter 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] In this example, R 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 the velocity is given. It can be seen from the enlar...

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Abstract

The invention discloses a control method and system for a permanent magnet synchronous linear motor, comprising the following steps: establishing a mathematical model of the permanent magnet synchronous linear motor in a two-phase rotating coordinate system; taking the stator resistance and the total disturbance of a mechanical system as an expansion state to establish an expansion The extended system is divided into interconnected subsystems, and an interconnected observer based on Kalman filter is constructed for each subsystem; wherein, the linear time-varying part of the interconnected observer satisfies the continuous excitation condition, and the observation error converges to zero; according to The unmeasurable state quantity is back-stepped recursive design controller, so that the controller controls the motor speed to track the expected value according to the output current of the motor and the input voltage to the motor, so as to realize the speed tracking control of the motor. In the present invention, when the motor system is faced with time-varying parameters and external disturbances, its stability is guaranteed, and the influence of disturbances in servo control is weakened.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a control method and system for a permanent magnet synchronous linear motor. 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 backlash controller with integral action and an adaptive interconnected observer. In order to eliminate the mechanical sensor, an automatic Adapted interconnected observers to estimate rotor position and speed. However, 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, so When the motor system faces 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 Patents(China)
IPC IPC(8): H02P21/13H02P21/14H02P25/064
CPCH02P21/13H02P21/14H02P25/064
Inventor 武康林颖
Owner JIANGNAN UNIV
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