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 to 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 rotating.
- The torque adjustment error causes excessive torque, and causes the motor to stop the rotating.
- With 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 a 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 the load phenomenon.
COVNA manufactures quarter-turn electric actuators and multi-turn electric actuators with overloading protection. If you are interested, please contact us at firstname.lastname@example.org