China motor network, increase the stepper motor dynamic torque method

Step 1, select from the Angle of small stepper motor at low speed torque gets bigger with the increase of rotor teeth. Choose small step away from the Angle of step motor can obtain high torque. A dozen HB type on the rotor teeth like 50 tooth, permanent magnet magnetic flux leakage will increase, but will step in proportion, this conclusion in 100 teeth of the following are valid. Type three-phase HB stepping motor from 1.2 ° 50 tooth (rotor) change 0.6 ° 100 teeth (rotor). About 1.4 to 1.8 times the torque at low speed. 2, bipolar rotor cutting machine connection efficiency can cover 2 times. It is easy to buy on the market two phase unipolar or bipolar stepper motor, but bipolar drive power tube is larger than that of unipolar. Stepper motor in high speed way to increase the torque: 1, to reduce the number of turns, reduce L in motor manufacturer's standard products choose small inductance L, rated current. 2, a permanent magnet flux is smaller Can't ac synchronous motor reduce the permanent magnets, such as production maternity leave can increase the air gap, reduce the high speed counter potential, increase current, make the torque increases, the speed - torque characteristic from low speed to high speed into a straight line, increase the torque, frequency response also increases at the same time. Step 3, choose from the Angle of motor. , step motor running at a high speed in the drive circuit improve the method of torque: 1, improve the drive current voltage to maintain high speed large torque, to keep the current constant, make the chopper work in constant current state. To make a constant current can only improve the pulse frequency. When as a stepping motor velocity must be high speed, because the voltage limit, can only work in constant voltage state, if the input voltage, then you can make it at a high speed still can work in constant current state, if the input voltage, then you can make it at a high speed still can work in constant current state, thus improve the speed torque. 2, to reduce the driving circuit shut off when the current in the coil current at the time of power tube shut off, due to the current rate of change is big, coil produced very big induced voltage, power tube will have a risk of being www.facebook.com/dongfeng.motor breakdown, there is often a protection circuit.