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We analyze a class of singularly perturbed hybrid systems based on two auxiliary hybrid systems: the averaged system, which approximates the slow dynamics, and the boundary layer system, which approximates the fast dynamics. The average system is generated by averaging the solutions of the boundary layer system. The novelty of this work is that the boundary layer system is a hybrid system rather than...
The use of a bi-directional buck-boost cascade converter in electric vehicles allows the suitable control of both motoring and regenerative braking operations. Based on the bidirectional buck-boost cascade converter, the random pulse width modulation (RPWM) scheme is implemented to reduce the conducted electromagnetic interference (EMI). Compared with the fixed frequency PWM (FPWM), the proposed RPWM...
The topology of four-quadrant rectifier is presented in this paper. The basic principle of space voltage pulse width modulation was analyzed. Account for 7-zone modes by using the vector summation scheme. To use voltage and current loop control system, and set up mathematical model. Finally found a model in Simulink/Matlab, the experimental results validate the feasibility of the control system, which...
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