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Sliding mode approach applied to sensorless direct torque control of cage asynchronous motor via multi-level inverter

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Protection and Control of Modern Power Systems 2020年第1期5卷 166-175页

作者： Soukaina El Daoudi Loubna Lazrak Mustapha Ait Lafkih Laboratory of Automatic Energy Conversion and MicroelectronicsFaculty of Sciences and TechnologySultan Moulay Slimane UniversityBeni MellalMorocco

To improve the robustness and performance of the dynamic response of a cage asynchronous motor,a direct torque control(DTC)based on sliding mode control(SMC)is adopted to replace traditional proportional-integral(PI)and hysteresis *** combination of the proposed strategy with sinusoidal pulse width modulation(SPWM)applied to a three-level neutral point clamped(NPC)inverter brings many advantages such as a reduction in harmonics,and precise and rapid tracking of the *** are performed for a three-level inverter with SM-DTC,a two-level inverter with SM-DTC and the three-level inverter with *** results show that the SM-DTC method achieves better performance in terms of reference tracking,while adoption of the threelevel inverter topology can effectively reduce the *** the SM-DTC to the three-level inverter presents the best solution for achieving efficient and robust *** addition,the use of a sliding mode speed estimator eliminates the mechanical sensor and this increases the reliability of the system.

关键词： Asynchronous cage motor Direct torque control sinusoidal pulse width modulation Sliding mode control Speed estimator Three-level inverter

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Ride through Strategy for a Three-Level Dual Z-Source Inverter Using TRIAC

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Circuits and Systems 2016年第11期7卷 3911-3921页

作者： A. Nazar Ali Dr. R. Jeyabharath K. Ramakrishnan College of Technology Trichy Tamilnadu India K.S.R Institute for Engineering and Technology Namakkal Tamilnadu India

A new ride through strategy is introduced in a three-level dual Z-source inverter, for isolation under semiconductor switching failure condition. Here the output will have no significant decrease in the amplitude and quality. Instead of diodes, the triacs are added to the inverter source ends, as it can perform a bidirectional power transfer also it can operate well in both low and high voltage operating conditions. The faulted part can be isolated by simply altering the firing pulses for turning on/off the triacs using the carrier based SPWM technique and resulting in a boosting output with zero common mode voltage. Consequently, it forms a common floating point or null point with a zero common mode voltage. It is experimentally verified by using MATLAB, and digital oscilloscope.

关键词： Common Mode Voltage Fault Compensation Three-Level Inverter sinusoidal pulse width modulation Z-Source Inverter

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MSP430-based single-phase sine wave inverter

MSP430-based single-phase sine wave inverter

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教育部中南地区高等学校电子电气基础课教学研究会第二十届学术年会

作者： Liu Zi-xi,Shi Wei,Luo Jin-wei (School of Information Engineering,Wuhan University of Technology,Wuhan 430070,China)

This paper describes a MSP430 microcontroller based SPWM inverter *** the boost section and the SPWM inverter section,it can give high-quality AC whose frequency and voltage has been *** design is based on Boost topology principle and uses high-performance voltage PWM control chip TL494 to drive the MOS tube in main ***430 microcontroller is the center of the whole *** cooperates with the 12-bit high-precision D/A module to control the output voltage *** system has a good over-current protection and can detect load conditions *** SCM technology to control this power makes the whole system more simple and achieves digital *** provides a kind of high-quality AC power for equipments with high performance requirements.

关键词： Inverters MSP430 single chip sinusoidal pulse width modulation voltage negative feedback

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