Drive is not normally available in any case, so the user is necessary to load, environmental requirements and the drive to have more understanding.

1 load type and the frequency of choice:

Driven by the motor load is not the same, not the same demands on the drive.

A: fans and pumps are the most common load: drive requirements for the most simple, as long as the inverter capacity is equal to the motor capacity (air compressor, deep water pumps, sand pumps, fast-changing musical fountain need to increase capacity) .

B: Cranes class load: impact of such load at startup feature is great, and therefore requires a certain margin inverter. Meanwhile, in heavy decentralization elbow, there will be energy feedback, so to use the braking unit or using a shared bus mode.

C: uneven line load: some load sometimes light, sometimes heavy, heavy load and you should follow to select the inverter capacity, such as rolling mill machinery, grinding machinery, mixer and so on.

D: high inertia load: rotary kiln as centrifuges, presses, cement plants, such load inertia is large, you may start oscillating Therefore, when the motor regenerative deceleration. Should be slightly larger capacity drive to speed up the start, to avoid oscillation. With the power brake unit to eliminate feedback.

2 Long-term low-speed moving forward, due to higher motor heat, fan cooling capacity decreases, and therefore must be a way to increase the reduction ratio, or use 6 motor, so near the motor running at a higher frequency.

3 inverter installation site must meet the requirements of the standard environment, otherwise easily lead to malfunction or shorten the life; distance between the drive and the drive motor is generally not more than 50 meters, For longer distances you need to reduce or increase the carrier frequency output reactor option to operate properly.