Permanent magnet synchronous motor self-adaptation control method based on temperature variation

A permanent magnet synchronous motor, adaptive control technology, applied in the direction of motor generator control, electronically commutated motor control, control system, etc., can solve the problems of motor model uncertainty, measurement data with noise, etc.

Active Publication Date: 2012-10-03
HANGZHOU VANGO TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the PMSM strongly coupled nonlinear dynamic system, due to the existence of operating temperature and modeling errors, the motor model has certain uncertainty, and the measurement data in the control process is also noisy.

Method used

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  • Permanent magnet synchronous motor self-adaptation control method based on temperature variation
  • Permanent magnet synchronous motor self-adaptation control method based on temperature variation
  • Permanent magnet synchronous motor self-adaptation control method based on temperature variation

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Embodiment Construction

[0037] The self-adaptive control method of permanent magnet synchronous motor based on temperature change proposed by the present invention, its logic block diagram is as follows figure 1 shown, including the following steps:

[0038] (1) Assuming that the stator winding of the permanent magnet synchronous motor is connected in a star shape, the counter electromotive force of the permanent magnet synchronous motor is sinusoidal, there is no damping winding on the rotor of the permanent magnet synchronous motor, and the permanent magnet conductivity of the permanent magnet synchronous motor is zero, according to The above conditions establish a mathematical model of a permanent magnet synchronous motor in the d-q coordinate system, such as image 3 Shown:

[0039] The three-phase stator voltage vector equation of the permanent magnet synchronous motor represented by the A-B-C shaft system is:

[0040] u s = R ...

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Abstract

The invention relates to a permanent magnet synchronous motor self-adaptation control method based on temperature variation, and belongs to the technical field of control to permanent magnet synchronous motors. A mathematical model that a permanent magnet synchronous motor is in a d-p coordinate system is established; within a minus 50 to 150 DEG C temperature range of the permanent magnet synchronous motor, modified R and L are computed according to a relationship between the resistor R of the three-phase stator of the permanent magnet synchronous motor and the temperature variation at a moment t, and another relationship between an inductor L of the three-phase stator of the permanent magnetic synchronous motor and the temperature t. With the utilization of the modified R and L according to the temperature self-adaptation, the machinery angular speed of a permanent magnet synchronous motor rotor is obtained via computing. The method modifies the variation of the resistor and the inductor, which is caused by the own temperature variation of the permanent magnet synchronous motor, solves many problems of a control system caused by the variation, optimizes the control model of the permanent magnetic synchronous motor, and improves the control precision of the permanent magnet synchronous motor to a larger extent.

Description

technical field [0001] The invention relates to an adaptive control method of a permanent magnet synchronous motor based on temperature change, and belongs to the technical field of permanent magnet synchronous motor control. Background technique [0002] The permanent magnet synchronous motor replaces the electric excitation with permanent magnets, thus eliminating the need for excitation coils, slip rings and brushes, while the stator is basically the same as the electromagnetic synchronous motor, and still requires input of three-phase symmetrical sinusoidal current. When the stator of the permanent magnet synchronous motor is fed with three-phase AC current, the three-phase current will generate a voltage drop on the armature resistance of the stator winding. The rotating armature magnetomotive force generated by the three-phase alternating current and the established armature magnetic field cut the stator winding and generate an induced counter electromotive force in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 高强张岳
Owner HANGZHOU VANGO TECH
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