Main features of torque motor:
The characteristic of the torque motor is that it has soft mechanical characteristics and can be blocked. When the load torque increases, it can automatically reduce the speed and increase the output torque. When the load torque is a certain value, the motor terminal voltage can be adjusted. However, the speed adjustment rate is not good! Therefore, a speed measuring device is added to the motor shaft and equipped with a controller. The voltage output from the speed measuring device is used to automatically adjust the terminal voltage of the motor compared with the voltage given by the controller. stable!
It has the characteristics of low speed, high torque, strong overload capability, fast response, good linearity of characteristics, small torque fluctuation, etc. It can directly drive the load to eliminate the reduction gear, thus improving the running accuracy of the system. In order to obtain different performance indexes, the motor has three different structural forms: small air gap, medium air gap and air gap. The small air gap structure can meet the requirements of general use accuracy. The advantage is lower cost; the air gap structure is increased due to air gap. The cogging effect is eliminated, the torque fluctuation is reduced, the nonlinear change of the magnetic resistance is basically eliminated, the linearity of the motor is better, the electromagnetic air gap is increased, the armature inductance is small, the electrical time constant is small, but the manufacturing cost is high. The medium air gap structure has a performance index slightly lower than that of the air gap structure motor, but much higher than the small air gap structure motor, and the volume is smaller than the air gap structure motor, and the manufacturing cost is lower than that of the air gap structure motor.
