Anti-integral saturation non-inductive permanent magnet synchronous motor rotor position detection method
A permanent magnet synchronous motor and rotor position detection technology, which is applied in the control of generators, motor control, motor generator control, etc., can solve the problems of small amount of calculation, saturation of integrator, etc., and achieve the effect of reducing the amount of calculation
Active Publication Date: 2021-11-05
X-SIGNAL INTEGRATED CO
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Problems solved by technology
[0005] One of the technical problems to be solved by the present invention is to solve the problem of integrator saturation in the direct integration algorithm of motor rotor position detection based on the stator voltage model, and the calculation amount is small, logic resources are saved, and it is easy to realize in engineering
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[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the following in conjunction with the attached Figure 1-2 The present invention will be described in further detail.
[0039] figure 1 It is a structural schematic diagram of an anti-integral windup non-inductive permanent magnet synchronous motor rotor position detection system according to an embodiment of the present invention. Combine below figure 1 The present invention will be described.
[0040] In the field of motor technology, in the stator coordinate system with the motor stator as the reference object, that is, in the α-β coordinate system, the voltage model expression of the motor is:
[0041] ;
[0042] ;
[0043] where the voltage V α with voltage V β is the applied voltage on the α and β axes, and the current I α with current I β is the current on the α and β axes collected by the ADC circuit, R is the phase resistance of the motor, L is the pha...
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The invention discloses an anti-integral saturation non-inductive permanent magnet synchronous motor rotor position detection method. The method comprises the following steps of: acquiring a voltage V [alpha], a voltage V [beta], a current I [alpha] and a current I [beta]; constructing a mathematical model about the projection magnetic flux psi alpha of the magnetic flux psi of a motor on the alpha axis and the projection magnetic flux psi beta of the magnetic flux psi of the motor on the beta axis, and calculating integral terms in the mathematical model by using an integral arithmetic unit; adjusting the offset value in real time according to the integral value of the integral arithmetic unit; performing high-pass filtering on the magnetic flux psi alpha and the magnetic flux psi beta, and then performing arc tangent operation to obtain an original angle position theta raw of a rotor; performing differential operation on the original angle position theta raw of the rotor to obtain an original angular velocity omega raw of the rotor; performing low-pass filtering on the original angular velocity omega raw of the rotor to obtain the angular velocity omega of the rotor; and obtaining a rotor angular position theta according to the angular velocity omega of the rotor .
Description
technical field [0001] The invention relates to the technical field of motor control, in particular to an anti-integral saturation non-inductive permanent magnet synchronous motor rotor position detection method and system. Background technique [0002] In order to achieve maximum efficiency in motor control, it is necessary to know the real-time position information of the rotor. The location information can come from sensors, and can also be estimated by a certain algorithm. Among them, the former is called the sensing scheme, and the latter is called the non-sensing scheme. Compared with the sensored solution, the sensorless solution has the advantages of low cost and adaptability to high temperature and high pressure environments where sensors may fail. [0003] In the non-inductive scheme, the algorithm module that detects the rotor position is called an observer. According to the algorithm principle, observers can be divided into two categories: the first category i...
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Login to View More IPC IPC(8): H02P6/182H02P21/18H02P21/00
CPCH02P6/182H02P21/18H02P21/0003H02P2203/03
Inventor 王可睿孔令新王乃龙
Owner X-SIGNAL INTEGRATED CO