Locomotive Air Conditioning Inverter Power

With the development of power electronics, electric drive control plays an increasingly important role in modern societiy. The AC variable-frequency speed regulating system becomes more and more important in the electric drives for its high performance, environmental protection and energy conservation.The paper presents a DSP-based motor VVVF control system, by using TMS320F2812 motor control chip of TI Company as the core control. It presents the design of the motor drive module and power modules.In this paper, it first introduces the basic types of AC drive, the realization of the basic principles of open-loop voltage devices and space vector of the U / F control principle.Then based in conditioning circuit - Rectifying and DC-DC conveter, it presents the design and research of frequency conveter. It makes a control system by DSP, and relizes the open-loop voltage space vector of the U / F control of the VVVF control strategy through the compile, C programming language.Based on these analysises, we made experiments of 3kW load in the frequency of 30 Hz and 50 Hz. Comparing with the experimental results and MATLAB simulation waveforms, it shows that the AC drive system can achieve smooth speeding in 5 to 50Hz, besides, it has a good dynamic and static AC drive performance, so it confirms the effectiveness and feasibility of the system.The results showed that the DSP-based frequency control system has a excellent performance, stable operation, well anti-interference capability and it is a set of advanced type, innovative, practical control system..