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How to choose the power of high-power DC motor correctly?

2019-10-29 11:32:00


To correctly select the power of a high-power DC motor , the following calculations or comparisons must be performed:
1. For constant load continuous work, if you know the power of the load (that is, the power on the production machinery shaft) Pl (kw). The power P (kw) of the required motor can be calculated by the following formula:
P = P1 / n1n2
Where n1 is the efficiency of the production machine; n2 is the efficiency of the motor. That is transmission efficiency.
The power obtained by the above formula is not necessarily the same as the product power. therefore. The rated power of the selected motor should be equal to or slightly greater than the calculated power.
2. Short-term working quota motor. Compared with a motor with the same capacity and continuous operation. Large torque, low weight and low price. Therefore, when conditions permit, you should choose a short-term working motor.
3. For motors with intermittent working quotas, the power selection should be based on the size of the load rate, and the motors dedicated to intermittent operation should be selected. The calculation formula for the load string Fs% is FS% = tg / (tg + to) × 100% where tg is the working time and t. Is the stop time min; tg ten to is the work cycle time min.

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