Taxi two wheel motorcycle motor speed control device is set to transform the shift and direction of the electric car , its role is to control the motor voltage or current, complete control of the motor drive torque and rotational direction.
Before electric cars on DC motor speed using the series resistance or change the motor field coil turns to achieve. Because there is a level of speed and will produce additional energy consumption or use of a motor complex structure, it has been rarely used today. Today electric and motorized tricycle wider application of thyristor chopper controlled by uniformly changing the motor terminal voltage, controlling the motor current to achieve variable speed motor . In the continuous development of power electronics technology, which is gradually replaced by other power transistor chopper speeder is. From the technology point of view, along with the application of new drive motor speed control conversion of electric vehicles for the application to DC inverter technology will become an inevitable trend.
Electric taxi tricycle in the drive to transform the motor rotation control, the DC motor contactor rely on changing the current direction of the armature or magnetic fields to achieve the motor The rotation transformation, which makes the Confucius Ha circuit complexity, low reliability. When using the AC induction motor drives, changing the motor turning magnetic field can only change the phase sequence of three-phase current, the control circuit can be simplified. In addition, the use of AC motor and frequency conversion control technology, the braking energy recovery control of electric vehicles more convenient, more simple control circuit.
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