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19-04-2023 #22
Personally I'd probably wire it for low speed, then overspeed it via the VFD.
You could wire it for highspeed then run it slower from the VFD, but you won't get as much torque at the lower speeds.
From the plate details
0.45KW at 2800rpm is 1.53Nm
0.3KW at 1400RPM is 2.05Nm
Using the high speed windings, you'll have 1.53Nm from 2800rpm down to probably a few hundred RPM. This depends on VFD ability, motor performance, but it'll reach a point where the motor will noticeably lose performance and likely become noticeably rough.
Using the low speed winding, you'll have 2.05Nm from low speed to 1400RPM. Due to the lower rated speed (the two speed essentially works by selecting 2 or 4 pole operation), the motor will also be capable of being spun slower before performance becomes an issue.
From 1400RPM to 2800RPM, the power output will remain limited at 0.3KW which means the torque will gradually reduce from 2.05Nm at 1400RPM down to 1.02Nm at 2800rpm.
However, if your main use was in the higher speed range, then wiring it for the higher speed range would make more sense to get the most power.
Off course, you could add a changeover switch, but you'd have to ensure you don't switch it with the motor powered and spinning.Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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