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A PMLSM Sensorless Control Method Based on Adaptive Gain Sliding Mode Observer

A technology of sliding mode observer and adaptive gain, which is applied in the direction of control system, control generator, vector control system, etc.

Active Publication Date: 2019-04-26
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects existing in the prior art, the present invention proposes a sensorless control method for permanent magnet synchronous linear motor based on adaptive gain sliding mode observer, the purpose is to make the control system operate in complex systems with parameter perturbation, load disturbance, etc. It can also achieve fast and accurate estimation of the back electromotive force of the permanent magnet synchronous linear motor, the position and speed of the mover, and can effectively improve the anti-interference ability of the system

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  • A PMLSM Sensorless Control Method Based on Adaptive Gain Sliding Mode Observer
  • A PMLSM Sensorless Control Method Based on Adaptive Gain Sliding Mode Observer
  • A PMLSM Sensorless Control Method Based on Adaptive Gain Sliding Mode Observer

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Embodiment Construction

[0045] The preferred embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0046] figure 1 It is a structural principle block diagram of the present invention. As shown in the figure, in this embodiment, the specific steps of the method of the present invention are as follows.

[0047] Step (1): Input the given value of the linear motor speed as the target, and use the current transformer to measure the three-phase current i of the permanent magnet synchronous linear motor a i b i c , and carry out the Clark transformation to convert to the equivalent current i in the α-β coordinate system α i β , use a multimeter to measure the three-phase voltage of the permanent magnet synchronous linear motor and perform Clark transformation to convert it into the equivalent voltage u in the α-β coordinates α , u β .

[0048] Step (2): According to the equivalent current i in the α-β coordinate system in step...

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Abstract

The invention discloses a sensorless control method for PMLSM based on a self-adaptive gain sliding mode observer, belonging to the field of linear motor control technique. In order to obtain the control signal of a linear motor, the sensorless control method for PMLSM based on the self-adaptive gain sliding mode observer designed in the invention can realize estimating counter electromotive force, active cell speed and magnetic pole position of the linear motor quickly and accurately under the condition that the control system of PMLSM exists parameter perturbation and load disturbance, the anti-jamming capability of the system can be improved effectively, the inherent defect buffeting of the sliding-mode observer is weakened by changing the function of the sliding-mode switch,improving the sliding-mode surface and designing the self-adaptive gain, and the system reliability is improved.

Description

technical field [0001] The invention relates to a sensorless control method for a permanent magnet synchronous linear motor based on an adaptive gain sliding mode observer, and belongs to the technical field of linear motor control. Background technique [0002] The development of modern industry has higher and higher requirements for the acceleration and speed of linear motion. The transmission structure of the traditional rotating motor combined with the roller screw reduces the overall rigidity of the system, and the intermediate transmission link will also lead to a decrease in the robustness of the system. Servo performance decline. The linear motor can directly convert electrical energy into linear motion without any intermediate links, and overcomes the above shortcomings. It is currently widely used in CNC machine tools and maglev trains. Compared with rotary motors, its speed is also increased by dozens of times. [0003] The control system based on the permanent m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/18H02P25/022H02P25/064
CPCH02P21/0007H02P21/0017H02P25/06
Inventor 杨春雨马婷婷周林娜车志远李恒
Owner CHINA UNIV OF MINING & TECH