Speed sensorless control method of permanent magnet synchronous motor

A permanent magnet synchronous motor and speed sensorless technology, which is applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve problems such as large amount of calculation, inability to adapt to harsh environments, difficult installation, etc., and achieve phase elimination The effect of identifying errors, ensuring global convergence, and fast response

Inactive Publication Date: 2016-10-12
YANGZHOU UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, as the requirements for control accuracy are getting higher and higher, the problems caused by the use of speed sensors, such as increased cost, difficult installation, larger system size, and inability to adapt to harsh environments, have greatly restricted the application of permanent magnet synchronous motors.
[0003] So far, researchers around the world have proposed many speed sensorless control methods, most of which are based on the mathematical model of the motor to design the identification algorithm. The algorithm is complex, the calculation is large, and the forward and reverse control of the motor cannot be realized. The influence of the dead time of the power electronic inverter on the estimation algorithm is not considered

Method used

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  • Speed sensorless control method of permanent magnet synchronous motor
  • Speed sensorless control method of permanent magnet synchronous motor
  • Speed sensorless control method of permanent magnet synchronous motor

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with specific embodiments.

[0042] A speed sensorless control method for a permanent magnet synchronous motor, comprising the following steps:

[0043] 1) Design an adaptive sliding mode observer

[0044] Build the actual motor model:

[0045]

[0046] Build an estimated motor model:

[0047]

[0048] in, Estimated rotational angular velocity for the rotor; ω r is the actual rotational angular velocity of the rotor; u d , u q is the component of the stator voltage on the d-axis and q-axis; i d i q is the component of the actual stator current on the d-axis and q-axis; Estimated current components on the d-axis and q-axis for the stator; ψ f is the rotor excitation flux linkage; Δθ is the phase difference between the assumed rotating coordinate system where the model motor is located and the actual dq coordinate system; R s is the motor stator phase resistance; L s is the synchronous...

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Abstract

The invention discloses a speed sensorless control method of a permanent magnet synchronous motor, and belongs to the field of permanent magnet motors. A conventional assumption rotating coordinate method is adopted as a basis, on the basis of a model motor method, an estimation rotating speed is directly adopted as a control quantity through a sliding mode control method, then, a self-adaption law of the estimation rotating speed is obtained through a Lyapunov non-linear design method, an algorithm is greatly simplified, the system response speed is increased, meanwhile, forward and reverse rotation of the motor can be achieved, and the method can be used for the permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to a permanent magnet motor, in particular to a permanent magnet synchronous motor. Background technique [0002] In the high-performance permanent magnet synchronous motor servo system, it is usually necessary to install a speed sensor to feed back the speed signal, so as to realize closed-loop control. However, as the requirements for control accuracy become higher and higher, problems such as increased cost, difficult installation, larger system size, and inability to adapt to harsh environments brought about by the use of speed sensors have greatly restricted the application of permanent magnet synchronous motors. [0003] So far, researchers around the world have proposed many speed sensorless control methods, most of which are based on the mathematical model of the motor to design the identification algorithm. The algorithm is complex, the calculation is large, and the forward and reverse control of the motor cannot be reali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/24H02P21/18
Inventor 史旺旺杜佳玮
Owner YANGZHOU UNIV
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