Research On Economizer Motor Breaking

In the 21st, human being will face to the more and more large crises of the energy. Saving the energy sources is necessary for durative development to China even to the world. At present, using a resistance to consume the energy which is generated by electric breaking of motor in the industry. But this model of electric breaking will be a tremendous waste for the limited energy sources. On the base of building an economized society, this paper will aim at the re-utilizing the energy which is generated by the electric breaking of the motor. The main contents of this thesis include:(1)Summarize the characteristics of the super-capacitance and the circuit of charge or discharge. Research the causation of the equal voltage and the principle of the equal voltage for super-capacitance. Research on the bidirectional DC-DC convert mainly and summarize the topology of bidirectional DC-DC converter.(2)Use the super-capacitance to utilize the energy which is generated by the electronic breaking of the motor: choose and design the main circuit of the electronic breaking; build a little signal modeling of the main circuit; design the ideal control parameters based on the main circuit of the little signal modeling; then simulate the system in the Matlab/Simulink. At the end, design the discrete controller relevantly and apply on the Digital Signal Processor-TMS320LF2407A.(3)Transport the energy regenerated by the motor to the grid-connected directly: choose and design the inverter; build the little signal modeling of the main practical circuit; choose the Real Time Current Following Control Model as the control model, and design the ideal control parameters of the controller based on the little signal model, then simulate the model in the Matlab/Simulink. At the end, design the digital controller based on the analogPID controller, and use the Digital Signal Processor -TMS320LF2407 toimplement.(4)For keeping the frequency and phase synchronous to the grid, a PLL(Phase Locked Loop) is necessary. This paper puts forward a new concept of the Soft PLL, uses the TMS320LF2407A to carry out.