Stepless speed regulation
The mechanical properties of the torque motor can be achieved with high stiffness under the control of modern servo drives, so that direct drive can be achieved instead of the original mechanical drive. At present, there are products such as CNC rotary table and CNC swing angle milling head that use torque motor as the core power component. These products are not as good as the mechanical transmission in terms of volumetric power ratio, but because they have no transmission gap, no wear, high transmission accuracy and high efficiency, they have begun to be popularized in precision equipment.
In some special occasions, the motor is sometimes required to maintain a static moment for a period of time, such as tensioning at the beginning of the cable winding; forging clamps of large forging presses. Because the torque motor has a large impedance; its stall current is small, and forced air is used at the same time, so it can meet the stall request within a certain period of time. The allowable stall time should be calibrated according to the nameplate. If a longer stall time is required, a larger torque motor can be used to obtain the terminal voltage of the torque motor.
Other torque motors can also be flexibly applied according to their various characteristics. For example, they have the characteristics of DC series-excited motors, which can partially replace the use of DC motors. For example, according to the high resistance characteristics of the rotor, the starting (blocking) torque is large. It is applied in the opening and closing gate (valve) door and the drag system with large resistance torque; it can also be used to make the starting (blocking) torque large, the starting (blocking) current is small, and the mechanical strength of the solid rotor is high. Used on a variety of machines with frequent positive and negative devices or other similar actions.
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