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Method for determining rotational speed of two-phase orthogonal-winding permanent magnet synchronous motor

A permanent magnet synchronous motor and orthogonal winding technology, which is applied in the direction of AC motor control, generator control, motor control, etc., can solve the problems of increasing system hardware complexity and total cost, system inoperability, and increasing system maintenance requirements

Inactive Publication Date: 2017-10-20
BEIJING INST OF CONTROL ENG
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, these sensors increase the complexity of the system hardware and the total cost, and reduce the mechanical robustness and reliability of the system. At the same time, due to the limitation of the working conditions of the sensors, the system cannot operate in harsh environments and increases the maintenance requirements of the system.

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  • Method for determining rotational speed of two-phase orthogonal-winding permanent magnet synchronous motor
  • Method for determining rotational speed of two-phase orthogonal-winding permanent magnet synchronous motor
  • Method for determining rotational speed of two-phase orthogonal-winding permanent magnet synchronous motor

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Embodiment Construction

[0062] A method for determining the rotational speed of a permanent magnet synchronous motor with two-phase orthogonal windings. The method establishes a mathematical model of the motor with two-phase winding currents and back EMFs as state variables by deriving the mathematical model of the permanent magnet synchronous motor with two-phase orthogonal windings. An extended Kalman filter observation system is established to observe the back EMF of the motor. Using the observed back EMF, a digital phase-locked loop is used to obtain the motor speed and rotor position.

[0063] The speed determination of two-phase quadrature winding permanent magnet synchronous motor is usually combined with the motor speed closed-loop control to form a motor speed sensorless closed-loop control system.

[0064] A method for determining the rotational speed of a two-phase quadrature winding permanent magnet synchronous motor, the steps of the method are:

[0065] (1) Taking the two-phase stator ...

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Abstract

The invention, which belongs to the field of the closed-loop control technology of the permanent magnet synchronous motor, relates to a method for determining the rotational speed of a two-phase orthogonal-winding permanent magnet synchronous motor, especially to a method for determining a rotational speed of a two-phase orthogonal-winding permanent magnet synchronous motor on the condition of having no speed sensor, particular to a method for counter EMF observation of the two-phase orthogonal-winding permanent magnet synchronous motor and rotational speed determination. The method provided by the invention can be applied to a speed-sensor-free closed-loop control system of a two-phase orthogonal-winding permanent magnet synchronous motor so as to solve problems of low system reliability, poor environment adaptability, and increasing cost caused by sensor installation at the motor control system.

Description

technical field [0001] The invention relates to a method for determining the rotational speed of a two-phase quadrature winding permanent magnet synchronous motor, in particular to a method for determining the rotational speed of a two-phase quadrature winding permanent magnet synchronous motor without a speed sensor, especially for permanent magnet synchronous motors with two-phase quadrature windings. The invention relates to the observation of the back electromotive force of a magnetic synchronous motor and a method for determining a rotating speed based on the observation, belonging to the technical field of closed-loop control of a permanent magnet synchronous motor. Background technique [0002] The permanent magnet synchronous motor drive has the advantages of simple maintenance, high efficiency, and good low-speed performance. In order to fully reflect the characteristics of permanent magnet synchronous motors, the field-oriented vector control method is usually used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/18H02P21/13H02P21/26H02P25/022
CPCH02P21/18H02P21/0003H02P21/13H02P21/26H02P25/024H02P2203/03H02P2203/09H02P2207/05
Inventor 张猛熊宇聪郭超勇国锋吕振华马婷婷梁骄雁
Owner BEIJING INST OF CONTROL ENG
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