Through the comparison of Fig. 3-12 and Fig. 3-13 two pictures, apparently to verify the theoretical results of this paper mentioned above: when a given voltage increases, the speed of the motor is increased. The simulation results verified the correctness of the theory. Also, the more appropriate calculation parameter selection, system can run normally, and can achieve the desired effect.
Cascade speed AC stepless speed regulation as an efficient had prevailed, with the rise of modern variable frequency speed control, cascade control increasingly depressed, was mistakenly believed to be behind the speed control technology. In fact, the cascade speed in efficiency, mechanical properties and other essential aspects, and the variable frequency speed regulation is almost completely identical, and high voltage cascade speed economy is obviously better than that of variable frequency speed regulation. Especially in the high voltage and large capacity wind turbine, pump energy, show some of the advantages of cascade control is more obvious