A winding of Stepping motor is described by inductance and resistance as the csacade fashion.
As switching frequency increases, the build-up time become large and it results in the decreased torque and slow response. The least expensive way is to ad...
A winding of Stepping motor is described by inductance and resistance as the csacade fashion.
As switching frequency increases, the build-up time become large and it results in the decreased torque and slow response. The least expensive way is to add a resistor in series. But this method has disadvantage in which much power is dissipated in series resistors.
To reduce the power dissipation in driver and to increase the performance of a stepping motor, a dual voltage driving method is first investigated.
Also, to drive the stepping motor at high speed, a hysterisis driving method which offers the specified current build-up with low loss is secondly investigated. The advantage of the hysterisis driving method is that it needs a single power supply and gives small power loss and the driving efficiency is very high from low speed to high speed.