![]() ![]() Once again - if the motor is in decent shape and you are using it for hobby work it will probably outlast you. Because the VFD uses a switching frequency of 5000Hz there are some other voltages that can appear inside the windings for microseconds and the newer wire is rated for a higher voltage. Depending on how old the motor is, the wire used in the windings may not have the latest and greatest 1000V rated insulation. It adds no frequencies other than the 60 Hz that the motor was designed for. A rotary phase converter will use more electricity and is less efficient that a VFD. If you are using this in a hobby situation then the motor should last for years, unless it was very badly abused before you got it, and you would probably be able to tell that. Are you running this motor for high production at either a very low speed (less that 40 Hz) or a very high speed (greater that 66 hz) you might see problems with the motor. ![]()
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