Operating principle of torque motor

- Nov 05, 2018-

The constant torque characteristic torque motor can make the torque basically constant in a wide range of speeds, and is suitable for transmission occasions requiring constant torque when the speed changes. For example, in a printing and dyeing machine, when a fabric is conveyed by a plurality of rollers, since the fabric is not wound on the roller shaft, but is simply attached to the surface of the roller shaft and driven by it, the diameter of the roller shaft is not changed. A constant torque characteristic motor is used to ensure that the torque is constant at any speed and the tension of the fabric is constant.

The torque motor allows long-term low-speed operation (even blocking), and its heat is very serious. It is usually forced to air-cool by an external blower. When using the torque motor, please pay attention to check whether the operation of the blower is good, there should be a good ventilation environment around it, and dry and flammable materials are not allowed. Flammable dust or volatile fuels are close.

Due to different usage conditions, the type and specifications of materials wound or transmitted by the motor driven by the torque motor are different, the required tension is different, the torque of the torque motor is required to be adjusted, or the speed is required to be changed within a certain range, and the adjustment is usually applied to the torque. The voltage on the motor to achieve these requirements. Changing the input voltage of the torque motor usually uses a voltage regulator. In the case where it is required to improve the hardness and adjustment accuracy of the mechanical characteristics, the thyristor speed negative feedback control circuit can also be used for stepless speed regulation, but the system is complicated.