Knowledge
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Causes Of High Motor Current
Several situations of motor current being too high When the motor current is high, it is often manifested in the serious heating of the motor. The following basically summarizes the reason why the motor current is too high. 1. The power supply voltage is too high When the power supply voltage is too high, the …...Read more -
Features Of Large And Medium-Sized Motor
(1) Large and medium-sized motors need to be customized Different from the standardized design and production process of micro-motors, low-power motors and small-sized motors, large and medium-sized motors need to meet customer requirements for rated power, speed, voltage, bearing form, cooling method, protection level, torque characteristics, overload capacity, Dozens of parameters such as load characteristics, …...Read more -
Common Faults Of High-Voltage Explosion-Proof Motors
The faults of high-voltage explosion-proof motors can be divided into electrical faults and machine faults. The important faults in the machine are vibration, bearing overheating, rotor sweeping, abnormal running sound, etc.; in the electrical field, if the motor winding is grounded, short-circuited, open circuit, bad contact, squirrel cage broken and other faults. The insulation failure …...Read more -
Explosion-proof Motor Selection
The selection of explosion-proof motors must follow the following principles. 1. Explosion-proof motor selection principle The choice of explosion-proof motors must be compatible with the hazard of the explosive mixture. The so-called dangerous degree of explosive mixture refers to the group of explosion level and ignition temperature of explosive mixture. The selected explosion-proof electrical equipment …...Read more -
The Difference Between Explosion-Proof Motor And Ordinary Motor
What is the difference between explosion-proof motors and ordinary motors? 1. Explosion-proof motors are generally used in flammable and explosive situations 2. The sealing of explosion-proof motor junction box is better than that of ordinary motors 3. The low protection level of explosion-proof motors is IP55, while ordinary motors have IP23, IP44, IP54, IP55, and …...Read more -
Maintenance Of Explosion-proof Motors
Explosion-proof motors are widely used in flammable and explosive dangerous places, including explosive gas environment, combustible dust environment and fire hazard environment, etc., mainly used in coal mines, oil and gas, petrochemical and chemical industries. In addition, it is also widely used in textile, metallurgy, urban gas, transportation, grain and oil processing, papermaking, medicine and …...Read more -
Matching Selection Of Inverter And Motor
According to the load characteristics of the drive equipment, it is divided into three types: constant power load, constant torque load and fan pump load. Different load types have different requirements on the inverter. Constant power load The torque required by the spindle of the machine tool and the coiler and uncoiler in the rolling …...Read more -
The Difference Between Ordinary Motor And Variable Frequency Motor
1. Ordinary asynchronous motors are designed according to constant frequency and constant voltage, and it is impossible to fully meet the requirements of variable frequency speed regulation. The following is the influence of the inverter on the motor (1) The efficiency and temperature rise of the motor Regardless of the type of frequency converter, different …...Read more -
Motor Speed And Slip
The unit of rotation speed is r/m (rpm) per minute and r/s (rps) per second. ① Synchronous speed of the motor Because the rotation of the induction motor comes from the action of the rotating magnetic field, its speed is the same as that of the rotating magnetic field, so the synchronous speed of the …...Read more -
Abnormal Sound Of Motor Bearing
Common causes of abnormal bearing noise: 1. Impurities such as sand or carbon particles are mixed into the bearing, which acts as an abrasive; 2. The bearing is mixed with water, acid or paint and other dirt, which has a corrosive effect; 3. The clearance of the bearing is too small (the fit is not …...Read more