Changzhou Joinbrain Motor Co., Ltd.

The power consumption of cooling tower motors includes various forms, including stator copper loss and mechanical power consumption caused by iron loss, excitation current, stator copper loss, rotor copper loss, and stray loss related to the load current. Even when the cooling tower motor is unloaded, the power consumption of the cooling tower motor is not equal to zero. How to improve the efficiency and power of the cooling tower motor, for the comprehensive implementation of energy saving and consumption reduction work, is of great significance, so how will the power factors of the cooling tower motor be affected?

1. The quality of power has a direct impact on the normal operation and energy saving of cooling tower motors. When the cooling tower motor is under the non-rated voltage and non-rated frequency, the power consumption increases significantly, so that the cooling tower motor is in an unreasonable operating state, and the change of power voltage and frequency outside the allowable range has a significant change in the performance of the cooling tower motor, especially when the power frequency is reduced and the voltage is increased, the no-load loss and no-load current of the cooling tower motor should be greatly improved, so that the power factor is reduced. When the voltage drops, the speed of the cooling tower motor decreases, which increases the copper loss of the rotor and leads to a decrease in the power factor.

2. The large horse-drawn cart, that is, the cooling tower motor, is in a light-load operation state. There are two reasons for this:

1) Too many backup coefficients are added when selecting the cooling tower motor, so that the power of the cooling tower motor is much greater than the shaft power of the driven machinery.

2) Calculate the power of the driven mechanical shaft plus more safety factors, so that the shaft power is large.

3. The power conversion power of the driven machinery changes periodically, but the cooling tower motor is not equipped with a frequency converter. When the power becomes smaller, if the cooling tower motor has a frequency converter, the frequency can be reduced to reduce the power output, otherwise the reactive power part of the cooling tower motor will increase, affecting the efficiency of the cooling tower motor

4. The higher harmonic current enters the cooling tower motor around the circle, which increases the additional loss of the cooling tower motor, especially makes the temperature of the cooling tower motor rise, and burns out due to overheating in serious cases. The impulse voltage wave of higher harmonics makes the voltage distribution of the phase winding uneven, and the voltage distribution at the beginning and end of the winding is too high, which is easy to cause breakdown and short circuit between the winding turns. The pulse of the higher harmonic current causes the electromagnetic torque of the cooling tower motor to ripple, causing the cooling tower motor to vibrate. It's noisy. Under the influence of higher harmonic distribution capacitance, the shaft current of the cooling tower motor increases. In short, the higher harmonics will reduce the maximum torque of the cooling tower motor, reduce the power factor, and reduce the efficiency.

5. The voltage at the end of the cooling tower motor is low, in order to have enough output, the current will increase, and the loss of the cooling tower motor increases with the square of the current, so it also affects the efficiency of the motor.

6. The rotating part of the cooling tower motor has poor lubrication, which consumes part of the power, which will also affect the efficiency,The above influence of Kelaiwei Xiaobian shares with you the main influencing factors of the cooling tower motor power factor, in practical application, of course, the influence of other factors is not excluded, the above points are for your reference only.