First, the soft start of electric vehicles:
1, the soft start of the electric car controller when zero, the main frequency is from zero speed to the rated frequency regulation gradually, so that the motor at the start of the process, the impact of starting current current overload control can not exist, without the impact of the current can be transformed into control, we can also according to their own needs, to adjust the current to start in size, causing the entire motor at the start of the process, is the torque does not exist any impact, mainly rely on the smooth operation of two start, so called soft start.
2, the main composition of the soft start is connected in series between the controlled motor and power supply, three-phase thyristor and its associated anti whole electronic control circuit, use different methods, the three-phase anti parallel thyristor conduction angle control, the controlled motor according to the different ways of the input voltage. So, can the effective implementation of electric vehicle controller with different functions, but the frequency converter and soft starter is two completely different products use, the frequency converter is mainly to adjust the speed, the output can not only change the voltage, but also can change the frequency of the soft starter is a pressure regulator that is mainly used in the process of motor starting, the only change of voltage is no change in the frequency of the inverter, although also has such as Rev. The function of the actuator, but its price is much more expensive, and the whole structure is also very complex.
Two 、 hard start of electric vehicle:
1, the hard start of electric vehicles is relative to soft start, the motor current can reach 3~6 times at the start, the impact on the system is relatively large, the battery is not good.
2, in order to slow down the impact, the control voltage increases slowly when starting, thus reducing the starting current, which is called soft start.
3, if there is no voltage control, directly to the impact, it is called hard start.
