Electric motor products are widely used power equipment. According to the different application conditions of the motor, they are divided into different series of products, such as motors specially used in lifting metallurgy, textile, roller and other occasions with tendency requirements. According to the personalized requirements of the application conditions, the design and performance of the motor will tend to meet the requirements.
In the performance parameters of the motor, there are more agreements on the motor power and speed, and torque is reflected as an implicit requirement; for variable frequency motors, when it is lower than the basic frequency, it is output in a constant torque mode, and when the motor is higher than the basic frequency range, it runs in a constant power mode.
Torque, as one of the main performances of the motor, is a key performance indicator of the motor. For motors with the same power, the torque of high-speed motors is small, and the torque of low-speed motors is large; in the application of machinery manufacturing, textiles, papermaking, rubber, plastics, metal wires and wires and cables and other industries, a motor that can provide constant torque is needed, which is called a torque motor.
Torque motor is a special motor with soft mechanical characteristics and wide speed range. Its characteristics are that the motor has more poles, that is, the speed is lower, and the motor can continue to run at low speed or even stalled, while ordinary motors will be in danger of burning the winding due to the sudden increase of current at low speed and stalled state.
Torque motors are used in working conditions that require stable torque. The shaft of the torque motor outputs power at constant torque instead of constant power. The torque motor can provide positive torque and brake torque opposite to the direction of operation.
Torque motors with constant torque characteristics can operate within a large speed range and keep the torque basically constant. They are suitable for transmission occasions where the speed changes but constant torque is required. However, if the motor works at low speed or even stalled for a long time, the motor will heat up seriously. The insulation performance of the motor winding and the bearing lubrication system should be specially equipped, and the necessary forced ventilation or liquid cooling measures should be implemented for the motor to effectively dissipate heat.