Method, device and computer equipment for estimating flux linkage of permanent magnet synchronous motor
A permanent magnet synchronous motor and flux linkage technology, which is applied in the control of electromechanical transmission devices, control of generators, motor generator control, etc., can solve the problems of complex observer algorithms and unsuitable implementation, so as to avoid chattering problems and improve reliability. Realization degree, the effect of improving the operation speed
Active Publication Date: 2020-12-15
SHENZHEN H&T INTELLIGENT CONTROL
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Problems solved by technology
[0004] However, when the state observer in the traditional technology estimates the angle and speed of the permanent magnet of the rotor, the state equation needs to be completely consistent with the actual motor model, so that the angle and speed of the permanent magnet can be accurately identified
Such an observer algorithm is complex and not suitable for implementing
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[0053] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
[0054] The permanent magnet synchronous motor flux linkage estimation method provided by this application can be applied to figure 1computer equipment shown. The computer device includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Wherein, the processor of the computer device is used to provide calculation and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer program...
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The invention relates to a flux linkage estimation method and system of a permanent magnet synchronous motor, and a computer device. The method comprises the following steps: establishing a motor control model based on an alpha axis and a beta axis of a two-phase stationary coordinate system; establishing a basic state observation equation using an alpha axis stator side voltage and a beta axis stator side voltage as inputs and using the projection of an induced electromotive force on the alpha axis and the projection of the induced electromotive force on the beta axis as outputs, on the basisof the motor control model; performing decoupling simplification on the basic state observer equation to obtain a simplified state observation equation; performing derivation and solution according to the simplified state observation equation to obtain a full-order state observer; estimating the projection of the induced electromotive force on the alpha axis and the projection of the induced electromotive force on the beta axis by using the full-order state observer to obtain an alpha axis counter electromotive force estimation value and a beta axis counter electromotive force estimation value; and estimating an angle and a rotating speed of a rotor permanent magnet according to the alpha axis counter electromotive force estimation value and the beta axis counter electromotive force estimation value. By adoption of the method provided by the invention, the algorithm can be simplified.
Description
technical field [0001] The present application relates to the field of permanent magnet synchronous motor control, in particular to a method, device and computer equipment for estimating flux linkage of permanent magnet synchronous motors. Background technique [0002] As people and people pay more attention to the energy consumption of household appliances, the energy saving of household appliances is urgent. Among various energy-saving technologies for household appliances, realizing energy-saving through variable-frequency drive compression technology of permanent magnet synchronous motors (PMSM) has become a mainstream direction of energy-saving technologies. Therefore, the sensorless permanent magnet synchronous motor drive control technology has become the core and hot spot of research. [0003] The drive control of the sensorless permanent magnet synchronous motor is mainly to estimate the angle and speed of the rotor permanent magnet of the permanent magnet synchron...
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IPC IPC(8): H02P21/14
Inventor 张三艳
Owner SHENZHEN H&T INTELLIGENT CONTROL