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Double-integral sliding mode controller based on carrier waves

A dual-integral, controller technology, applied to controllers with specific characteristics, electric controllers, etc., can solve problems such as unstable closed-loop control methods and irregular frequency response of class D amplifiers, and achieve improved dynamic response and peak compensation , cost reduction effect

Pending Publication Date: 2022-01-11
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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Problems solved by technology

[0004] In order to overcome the irregular frequency response of Class D amplifiers and the unstable shortcomings of the closed-loop control method, the present invention proposes a carrier-based SiC Class D amplifier dual integral sliding mode controller, which solves the problems associated with the hysteresis modulation (HM) method The main problem with variable switching frequency and utilizes an additional integral term in the sliding surface to reduce the steady-state error

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  • Double-integral sliding mode controller based on carrier waves
  • Double-integral sliding mode controller based on carrier waves
  • Double-integral sliding mode controller based on carrier waves

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Embodiment Construction

[0022] In order to make the objectives, technical solutions and advantages of the implementation of the application clearer, the technical solutions in the implementation modes of the application will be described in more detail below with reference to the drawings in the implementation modes of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the present application. The embodiments described below by referring to the figures are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the scope of protection of this application. Embodiments of the pr...

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Abstract

The invention relates to the field of electrical equipment and electrical engineering, in particular to a double-integral sliding mode controller based on carrier waves. The controller comprises: a comparison module, which is used for comparing the output voltage of a class-D amplifier with a time-varying reference signal to obtain an error signal; a PI control module, which is used for performing PI control on the error signal to obtain PI control output; a modulation signal generation module, which is used for generating a modulation signal, wherein the modulation signal is obtained by subtracting a transformed capacitance current signal on the basis of PI control output; and a pulse width modulation module, which is used for comparing the modulation signal with the triangular carrier generating a grid signal to obtain a driving signal of the class-D amplifier. According to the invention, the gain of an additional pole in a loop is added in a double-integral term, so that the waveform distortion rate of the class-D amplifier is reduced, and the dynamic response of a system is effectively improved.

Description

technical field [0001] The application relates to the fields of electrical equipment and electrical engineering, in particular to a carrier-based double-integral sliding mode controller. Background technique [0002] Transistors in linear amplifiers dissipate a lot of power and thus require a lot of heat sinking for convection. Therefore, in miniaturized devices, the use of linear amplifiers is practically infeasible. Compared with traditional linear amplifiers, class D amplifiers have the characteristics of high efficiency, easy implementation and low cost, but they also have the problem of irregular frequency response. When a class D switching amplifier uses a high-Q low-pass LC filter at the output to extract the desired signal, it will cause a gain peak at the resonant frequency. Therefore, it is necessary to compensate the Q factor to flatten the frequency response of the amplifier over the entire bandwidth. [0003] Most current control strategies for Class D amplif...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 王铮艾凤明梁兴壮李征鸿王鹤
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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