Multi series inverter for electric car has many advantages . Type series arrangement greatly increases the output voltage vector , enhances the flexibility to control and improve the accuracy DC AC power inverter of control ; while reducing the fluctuation of the motor neutral point voltage . Inverter bypass charging characteristics can be improved flexibility and regenerative braking control .
With the growing concern for the urban environment , the development of electric cars got a rare opportunity. In urban traffic , the electric bus due to the large carrier , comprehensive benefits , become the object of priorities. Electric buses were powered by a three-phase AC motor, because the motor power, three-phase inverter device needs to withstand effects of high voltage and high current stress , high dv / dt and severe electromagnetic radiation , and the need for good cooling.
The use of multi- series structure of power inverter is a single device reduces voltage stress , reducing the device's requirements; reduce the dv / dt value , reducing the electromagnetic 24 volt power inverters radiation , heating devices are greatly reduced ; due to output increase the level of species , the control performance is better.
Multi series inverter suitable for high-power electric vehicle drive system. Using multiple tandem structure , a plurality of batteries connected in series can reduce the risk that will reduce the switching device and reducing the stress of electromagnetic radiation. But the number of batteries needed increased 2 -fold.
Multiple tandem structure of the output voltage vector species greatly increased, thus increasing the flexibility of the control and improve the accuracy of control ; motor while reducing the fluctuation of the neutral point voltage . In order to maintain the balance of each set of battery power , the need to ensure a 24v bypass inverter consistent runtime battery discharge time. Through the bypass mode , the flexibility to charge the battery pack , regenerative braking torque can be controlled.
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