VI. APPLICATION
The RBS described previously has been successfully type tested. In the real test system shown in Fig. 20, we use the TMS320F2812 as the control chip, and the specifications of the
motor are listed in Table II. As shown in Fig. 21, we can obtain different voltages for
different PWM duties with the same speed. Therefore, at different speeds, we can adjust the PWM duty to obtain different voltages. In Fig. 21, we made the speed 60 km/h. Through
adjusting the PWM duty, the dc bus voltage can reach and is even over the rated voltage. At the same time, when the speed is 30 km/h, 50% of the PWM duty can make the dc bus voltage
reach the rated voltage, so we can adjust the PWM duty to 70% and the voltage rise as shown in Fig. 22. Fig. 23 shows the voltage, current, and speed waveforms at the breaking state. When the EV speed descends from 70 km/h