Model-free current control method for permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and current control, which is applied in motor control, motor generator control, AC motor control, etc., and can solve problems such as difficult compensation

Active Publication Date: 2016-06-15
HEFEI UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The time-based compensation method is rarely used due to the difficulty of compensation. At present, the research hotspots at home and abroad have turned to the nonlinear online compensation method of the inverter based on the observer design. Key technical issues that need to be solved urgently, such as the impact of inverter nonlinear compensation and improving compensation accuracy and rapidity

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  • Model-free current control method for permanent magnet synchronous motor
  • Model-free current control method for permanent magnet synchronous motor
  • Model-free current control method for permanent magnet synchronous motor

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Embodiment Construction

[0041] In this embodiment, a model-free current control device for a permanent magnet synchronous motor is applied to a permanent magnet synchronous motor control system composed of an inverter, a current sensor, a position sensor and a DC power supply. In this embodiment, the settings include: Quadrature-axis model-free current regulator, direct-axis model-free current regulator, coordinate transformation module and space vector pulse width modulation module;

[0042] At the kth sampling period T k Next, the stator a-phase current i provided by the current sensor is adjusted by the coordinate transformation module a [k] and stator b-phase current i b [k], and the actual rotor position angle α[k] provided by the position sensor for coordinate transformation to obtain the actual stator direct axis current i d [k] and actual stator quadrature axis current i q [k];

[0043] The quadrature axis model-free current regulator according to the k-n-1th sampling period T k-n-1 The ...

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Abstract

The invention discloses a model-free current control method for a permanent magnet synchronous motor (PMSM) applied to a permanent magnet synchronous motor control system comprising an inverter, a current sensor, a position sensor and a DC power supply. The model-free current control method is characterized in that a model-free current control comprises a quadrature-axis model-free current regulator, a direct-axis model-free current regulator, a coordinate transformation module and a space vector pulse width modulation module. The model-free current control method for permanent magnet synchronous motor can improve the dynamic and static performance of an electric vehicle PMSM drive system; and the PMSM drive system has high robustness, so that efficient and safe operation of the electric vehicle PMSM drive system is achieved.

Description

technical field [0001] The invention relates to the field of permanent magnet synchronous motor control, in particular to a model-free current control method of a permanent magnet synchronous motor. Background technique [0002] There are many uncertainties in the permanent magnet synchronous motor (PMSM) drive system of electric vehicles, mainly manifested in the parameter uncertainty of PMSM and the nonlinearity of the inverter. The parameter uncertainty of PMSM is mainly characterized by the change of motor parameters. The temperature change accompanied by the motor load operation, the magnetic permeability of ferromagnetic material with the temperature change and the non-linear change of the saturation degree of the magnetic circuit are the causes of the motor parameter change. important reason. The nonlinear characteristics of the inverter mainly come from the dead time set by the power switching device, the non-ideal switching characteristics and the parasitic capacit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P25/022
CPCH02P2207/05
Inventor 李红梅周亚男姚宏洋张恒果刘立文
Owner HEFEI UNIV OF TECH
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