Double-three-level inverter open winding motor model control method

A three-level inverter and motor model technology, which is applied in the direction of motor generator control, electronic commutation motor control, AC motor control, etc., can solve the problem of dual two-level output voltage with less vectors, fewer control targets, and increased system Issues such as cost and complexity

Pending Publication Date: 2020-08-14
JIANGSU OCEAN UNIV
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Problems solved by technology

The midpoint voltage control can be realized by hardware or software methods: the current hardware control scheme mainly includes connecting a DC power supply of equal size in series on the DC side, and adding a Buck-Boost buck-boost circuit at the rectification output end to realize the dynamic balance control of

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  • Double-three-level inverter open winding motor model control method
  • Double-three-level inverter open winding motor model control method
  • Double-three-level inverter open winding motor model control method

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Embodiment Construction

[0064] The specific technical solutions of the present invention will be further described below with reference to the accompanying drawings, so that those skilled in the art can further understand the present invention without constituting a limitation on the rights of the present invention.

[0065] refer to Figure 1-3 , a dual three-level inverter open-winding motor model control method, the method includes the following steps,

[0066] (1) For the voltage at the kth moment electric current Rotating speed and the flux signal Sampling observation, given signal by flux linkage Estimate the flux linkage value ψ with the flux observer r Make a difference, and get the given value of the d-axis component of the stator current after passing through the PI regulator Through the given speed ω * Compared with the speed ω actually measured by the encoder, the given value of the stator current q component It can be obtained after adjustment by the PI regulator;

[0067...

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Abstract

The invention discloses a double-three-level inverter open winding motor model control method. The method comprises: sampling and observing the voltage and current rotating speed and the flux linkagesignal at the kth moment; obtaining a given value of a stator current d-axis component and a given value of a stator current q-axis component through a PI regulator, and obtaining an alpha-axis current given value and a beta-axis current given value under a two-phase static coordinate system through inverse Park transformation mathematical derivation; and substituting different to-be-selected voltage vectors to obtain a stator current prediction value at a k+1 moment, and optimizing the model through zero-sequence current suppression, voltage override jump control, neutral point potential balance control and switching frequency suppression. On the basis of vector control, the alpha-axis component and the beta-axis component of the stator current are independently controlled, prediction andfeedback tracking are conducted on the stator current in a model prediction control mode, zero-sequence current suppression, voltage override jump control, neutral point potential balance control andswitching frequency suppression are adopted, and multi-target optimization is achieved.

Description

technical field [0001] The invention relates to a motor model control method, in particular to a dual three-level inverter open-winding motor model control method. Background technique [0002] The common busbar structure of dual three-level inverters is similar to the common busbar structure of dual two-level inverters. When two inverters share a branch busbar, a large zero-sequence current will be generated, which will affect system performance. According to the zero-sequence current loop model, it can be seen that the magnitude of the zero-sequence current is closely related to the magnitude of the zero-sequence voltage of the two inverters. In Chapter 3, the direct addition of the zero-sequence voltage suppression item in the value function can start a certain However, when there are more optimization objectives, the value function cannot be biased towards a certain control item in each iteration, which will make it difficult to completely suppress the zero-sequence volt...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P27/12H02P21/14
CPCH02P21/00H02P27/12H02P21/14
Inventor 吴迪陈继峰朱芮胡家全华国武王影
Owner JIANGSU OCEAN UNIV
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