Development Of Soft Start Energy Saving Device For Three - Phase Asynchronous Motor Based On

Three phase AC asynchronous electric machine has simple structure, reliable operation and low price of low-cost advantages and is widely used. But asynchro nous electric machine deposit at the start of the current of the electric machine, the body produces serious influence network and dynamic power, and in the light load or no-load running state, power factor and efficiency greatly reduced, cause waste of electric energy. Ask questions.To start the characteristics and improve the efficiency improvement of electric machine, this paper research and development based on the speed of digital sign al processor TMS320F2812 asynchronous electric machine energy-saving soft sta rter. This paper’s main work and conclusions are:electric machine starting methd and energy saving compared with dynamic analysis in the country often use. Ex planation of the thyristor principle of three phase AC voltage regulating and volt age regulating energy. Discussion on the slope voltage start and current limiting starting, current ramp starting, soft stop machine control starting four electric ma chine soft starting control method. Proposed by DSP TMS20F2812 for controllin g different electrical step system chip dynamic machine energy saving soft start control device. Use the matlab simlink simulation function, build the asynchrono us electric machine soft starting simulation model of dynamic system of electric machine, all kinds of start mode for the simulation experiment. The simulation results are verified by using thyristor for three phase AC voltage regulating sche me is feasible, at the same time, verify the starting electric current to the control method can effectively limit asynchronous electric machine. Using the modular thinking into line based on the DSP control system design. Build the electric machine energy-saving soft starter test platform, and has carried on the related test. The test results show that the design of the asynchronous electric machine energy-saving soft starter can guarantee electric machine safety belt load startup, effectively limiting the electric machine starting current and in the light load state energy.