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DSP-based power inverter design

Author: ChenFu
Tutor: HuangDaGui
School: University of Electronic Science and Technology
Course: Precision instruments and machinery
Keywords: HF link inverter power supply TMS320F2802 Double-loop control ZVS soft-switching
CLC: TM464
Type: Master's thesis
Year: 2010
Downloads: 347
Quote: 0
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Abstract


With the advancement of science and technology as well as the development of society , the power inverter in the community more and more widespread. , Prompting inverter power inverter power requirements are also increasing at the same time constantly toward the high-frequency , high - efficiency , high-performance direction . The attendant control chip performance , power conversion circuit and control system requirements continue to increase, this paper, the above , the main chip TMS320F2802 DSP-based control with DC link frequency link inverter power and Implementation . Firstly, we discuss with the DC link power inverter main circuit design , Japan EMI serious shortcomings of the switching losses for the previous level of high frequency DC-DC converter , ZVS soft-switching technology , a detailed analysis of the the principles of the DC-DC boost circuit ZVS soft switch with push-pull topology and a work state; while for the subsequent stage of the DC-AC inverter circuit used in the working principle of the full-bridge inverter , SPWM modulation method to do a detailed analysis . Next, the uncertainty of the external load power inverter and non-linear as a current source disturbance in order to establish a power inverter mathematical model , and a mathematical model based on the root locus method control voltage feedback and current feedback control voltage and current double closed-loop feedback control strategy performance for a detailed analysis of the impact on the output characteristics in order to eliminate the DC bus voltage changes according to the actual situation of the main circuit topology , the proposed dual closed-loop PI control with feedforward control , and the specific parameters of the controller of the control system design. Finally, the power inverter hardware circuit and software system design based on the DSP chip TMS320F2802 detailed description , the main use of the the TMS320F2802 built-in enhanced the PWM generator EPWM module PWM waveform based on -off control power switches , design power inverter main circuit , sampling circuit , protection and auxiliary circuits ; writing control software to complete the initialization , the sampling of the signal , the realization of the double-loop control SPWM waveform generation , as well as abnormal shutdown function modules .

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CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > Converter > Inverter
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