Electric actuatorIt is a driving device that can provide linear or rotational motion, mainly utilizing a certain driving energy and working under the action of a certain control signal. The intelligent electric actuator produced by Shanghai Automation Instrument Co., Ltd. adopts a combination structure, with multi turn as the base type, which can derive straight stroke and angular stroke electric actuators with different performance, and can provide users with fast and dual speed electric actuators. The 'M' series electric actuator is suitable for continuous and frequent adjustment scenarios, with a frequency of up to 1200 times per hour. The 'A' series electric actuator is suitable for intermittent adjustment scenarios and can be used as a valve regulating device. Both are widely used in industrial sectors such as power plants, chemical engineering, petroleum, metallurgy, light industry, building materials, and water treatment.InElectric actuatorIt is very common to encounter electrical faults during the use of electric actuators. The electrical faults of electric actuators include the motor circuit, control module, potentiometer, and stroke control, which are divided into three parts:
1. Potentiometer and stroke control part
Usually, the potentiometer and stroke control part are connected to the rotating part of the electric actuator. The most common fault here is that they are not properly connected to the rotating part, resulting in the output of the position sending module not reflecting the actual position of the mechanism, thereby causing the control of the electric actuator to malfunction. If the travel control part is not properly connected to the rotating part, it cannot accurately reflect the operating position of the mechanism, which may cause the protection to fail and the mechanism to be mechanically damaged.
2. Electric motor circuit section
The faults in the electric motor circuit are mainly divided into high-power electric actuators and low-power electric actuators. Generally speaking, high-power electric actuators are mostly driven by three-phase AC motors. Due to the poor working environment and frequent operation of electric actuators, it is easy for the contacts of the AC contactor to burn and have poor contact, resulting in motor phase loss, overheating, and failure to operate in the forward or reverse direction; Electric actuators with lower rates are generally driven by single-phase AC motors and directly controlled by solid-state relays. The more common faults are: deterioration or damage of the starting capacitor, burning out of the solid-state relay and causing the motor to not move or not move in a certain direction.
3. Control module section
At present, the new typeElectric actuatorThe main control functions are concentrated on the main control module, position transmitter module, and power module. The detection of the position transmitter module and power module is relatively simple. Use a multimeter to measure whether the feedback signal of the position transmitter module is correct and whether the output voltage of the power module is normal. The main control module can be inspected by replacing the backup module or testing it on a normal mechanism. The probability of damage to the module itself is relatively small. Common faults during use are caused by vibration or installation, which leads to loose, disconnected, or disconnected wiring on the module, resulting in abnormal module operation. For example, when the bit sending module malfunctions due to strong voltage impact or damage to its weak components, the feedback signal may be incorrect, resulting in abnormal feedback display and automatic control failure. This requires careful installation or maintenance to ensure that the module wiring is firm and reliable.