DSP-based rotation speed estimation link PI parameter quantitative setting method

A speed estimation technology, applied in vector control systems, control generators, electronic commutation motor control, etc., can solve problems such as blindness and ambiguity, achieve good compatibility, small computational complexity, and avoid blindness. Effect

Active Publication Date: 2017-09-22
CHANGZHOU LIANLI AUTOMATION TECH
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Problems solved by technology

[0013] The purpose of the present invention is to solve the ambiguity and blindness in the traditional speed self-adaptive PI parameter configuration process, a kind of PI parameter quantitative tuning method based on DSP

Method used

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  • DSP-based rotation speed estimation link PI parameter quantitative setting method
  • DSP-based rotation speed estimation link PI parameter quantitative setting method
  • DSP-based rotation speed estimation link PI parameter quantitative setting method

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Embodiment Construction

[0039] see figure 1 As shown, the method of the present invention is adopted to adjust the PI parameters of the speed estimation system of the vector control system without speed sensor control, and implement on a set of motors with a rated voltage of 1140V and a rated power of 500kW. The parameters of the motor are Rs=20mΩ, Rr =5mΩ, Lm=19mH, Ls=21mH, Lr=21mH; number of pole pairs np=2;

[0040] 1) Obtain the parameters of the controlled object motor, synchronous frequency, and controller parameters, and calculate the gain K according to the original high-order precise transfer function model G(s) of the speed estimation loop; the speed estimation transfer model of the full-order flux linkage observer is as follows: figure 2 As shown in the figure, ωr , e ω ,ψ r ,e iq , η q They are the actual speed, estimated speed, speed error, rotor flux linkage, and current error q-axis projection; the gain K is calculated by the following formula

[0041]

[0042] All parameter...

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Abstract

The invention relates to the technical field of asynchronous motors, and particularly relates to a DSP-based rotation speed estimation link PI parameter quantitative setting method. Firstly, parameters of a control object motor, the synchronization frequency and controller parameters are acquired; according to the original transfer function in the speed estimation link, the gain K of a first-order simplified model is calculated; according to the complex vector model of an asynchronous motor full-order flux observer, the time constant T of the first-order simplified model is calculated; according to the acquired gain K and the constant T, the first-order simplified model for a speed estimation link transfer function is obtained; and according to requirements of an open-loop bandwidth omega<c><*> and damping xi<d><*>, after the natural oscillation frequency omega<n><2> meeting the requirements is acquired, and the final PI parameter for speed estimation link is solved. Thus, the DSP-based rotation speed estimation link PI parameter quantitative setting method solves fuzziness and blindness during the traditional speed adaptive PI parameter configuration process.

Description

technical field [0001] The invention relates to the technical field of asynchronous motors, in particular to a DSP-based method for quantitatively setting PI parameters in the speed estimation link. Background technique [0002] There are a large number of literatures describing the design of the feedback matrix of the full-order flux observer for asynchronous motors, and many full-range stable feedback matrix designs have also been proposed, including the stability of the feedback power generation state; in the application of the full-order flux observer, it is often According to the error of the flux linkage current and the corresponding speed adaptive law, the speed estimation is realized to achieve the purpose of speed sensorless control; the most commonly used speed adaptive law is the PI regulator, which can ensure that the feedback part satisfies the Popov inequality, so maintaining The stability of the original system remains unchanged. [0003] By selecting the fee...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/24H02P21/18
CPCH02P21/0003H02P2205/07H02P2207/01
Inventor 叶斌英孙卓杜恩利董步洲王建伟周峥
Owner CHANGZHOU LIANLI AUTOMATION TECH
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