Pneumatic actuators damage is a key problem is the load. The load case mainly has the following kinds:
1, the torque limit institutions setting is wrong, stop the torque is less than the setting value, resulting in continuous produce too large torque, the motor stop running.
2, because of some reasons make the torque limit circuit failure, lead to excessive torque.
3, using the environment temperature on the high side, the relatively decreased motor heat capacity.
4, the power supply voltage is too low, make its cannot obtain the required torque, motor stop running.
The use of 5, persistent, the heat generated by the savings of more than the allowed temperature to rise of the motor.
Generally run in a predetermined time, motor overload is not going to happen. For pneumatic actuator load condition of protection measures mainly include the following:
1, by using thermal relay and to protect the motor stalling.
2, through the adoption of thermostat to the continuous operation or electric operation of motor overload protection.
3, through the adoption of fuse or overcurrent relay can effectively avoid the short circuit accident.
