Drive for induction motor

Hello,

I don't think, that this motor has an insulation designed for frequency converter operation. The best option would be to contact the manufacturer of the motor to ask if details for the motor winding are still available. If this is not possible, I would use at least a high performance sine wave filter between motor and inverter (e.g. ask Schaffner for a suitable one), to protect from the high voltage peaks and the high dV/dt caused by the PWM of the converter. The filter needs to be effective also phase to ground (many cheaper ones have only a phase to phase filter). But at the end, there is of course still a risk, that the life time of the motor is reduced.