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Voltage regulation method in PMSM feedback linearization controller

A feedback linearization and controller technology, applied in the control of electromechanical brakes, control systems, control generators, etc., can solve the problems of motor performance impact, motor voltage can not be adjusted, and does not consider the voltage requirements of PMSM operating speed, etc. Achieve the effect of improving speed stability and speed control accuracy, precise speed and steady speed effect

Active Publication Date: 2019-11-01
GUIZHOU UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, the above control methods do not take into account the PMSM operating speed requirements for voltage
When the motor runs at a high speed or the load torque increases, the motor voltage cannot be adjusted and the motor performance is affected

Method used

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  • Voltage regulation method in PMSM feedback linearization controller
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  • Voltage regulation method in PMSM feedback linearization controller

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Embodiment 1

[0029] Embodiment 1: as figure 1 As shown, a method for regulating voltage in a PMSM feedback linearization controller, the method includes the following steps:

[0030] (1) Establish the state equation of the PMSM in the PMSM two-phase synchronously rotating dq coordinate system, as follows:

[0031]

[0032] where u d ,u q is the dq-axis component of the stator voltage, i d ,i q is the dq axis component of the stator current, L d , L q is the stator inductance component of the dq axis, R s is the stator resistance, ω r is the synchronous mechanical speed, n p is the number of pole pairs, B f is the coefficient of viscous friction, J is the moment of inertia, ψ f is the permanent magnet flux linkage, T L is the load torque;

[0033] (2) L in PMSM system d =L q =L, the mathematical model of formula (1) in the standard form of affine nonlinear system is as follows:

[0034]

[0035] In the formula: h 1 (x),h 2 (x) scalar function;

[0036] (3) Using th...

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Abstract

The invention discloses a voltage regulation method in a PMSM feedback linearization controller. The method comprises the steps of: establishing a state equation of a PMSM in a PMSM two-phase synchronous rotation dq coordinate system; performing affine of a mathematical model in a standard form of a nonlinear system for the state equation; adopting a feedback linearization method to perform linearization for the mathematical model in the standard form to obtain a feedback linearization mathematical model; and adopting the PI feedback regulation modulation ratio method, namely regulating the SVPWM modulation ratio through PI feedback to change the voltage of the motor to achieve PMSM voltage tracking and regulation. The method for controlling PMSM through adoption of input-output accurate feedback linearization and a method for regulating the modulation ratio through PI feedback are adopted to achieve PMSM voltage tracking and regulation, obtain the more accurate and stable speed effectof PMSM, achieve the PMSM global decoupling and the whole linear control and effectively improve the PMSM speed stability and the speed control accuracy.

Description

technical field [0001] The invention relates to a method for regulating voltage in a PMSM feedback linearization controller, belonging to the technical field of PMSM feedback linearization control. Background technique [0002] Permanent magnet synchronous motors (PMSMs) are widely used in many industrial applications due to their high efficiency, high power density, and high torque-to-inertia ratio. In order to realize the analysis and control of nonlinear systems, the approximation method of stepwise approximation is traditionally used. Uddin M.N uses the Back-Stepping method to carry out the online parameter self-tuning speed control of PMSM, and the system has good robustness. Linear control schemes (such as PI) have been widely used in PMSM systems. [0003] In the case of low control precision, the nonlinear factors in PMSM systems are usually ignored. However, as high-precision control is required in some servo systems, nonlinear factors in the system must be consi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/34H02P21/22H02P25/024H02P27/08
CPCH02P6/34H02P21/22H02P25/024H02P27/08
Inventor 杨朝江马家庆李文祥
Owner GUIZHOU UNIV
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