Electric actuators have their own special requirements, that is, must be able to limit the torque or axial force. Usually, electric actuators use a torque-limiting coupling. When the specification of the electric actuator is determined, the control Torque is also determined. Generally in the predetermined time and operating temperature, the actuator will not appear overload phenomenon.
However, the electric actuator may be overloaded if:
- The power supply voltage is low, the actuator does not get enough power and torque, so that the motor stops rotation.
- The torque adjustment error, causes the excessive torque, causes the motor to stop the rotation.
- Continuous use, the actuator has not had time to dissipate heat, the motor can withstand the temperature value.
- Torque limiting mechanism circuit failure, so that the torque is too large
- The high ambient temperature causes the decrease of the heat capacity of the actuator
In general, the protection of an actuator that is overloaded is:
- For motor continuous operation or electric operation overload protection, the use of thermostats
- Thermal relay is used to protect the motor from blocking
- Use Fuses or overcurrent appliances for short circuit accidents
Electric actuators are an essential part of industrial automation. In order to make the project safe and stable operation, it is very important to prevent the electric actuator from load phenomenon.
COVNA manufactures quarter-turn electric actuator with overloading protection. If you interested in, please contact us!