3-phase motor on a washing machine? Must be an industrial device, not hardly an over-the-counter consumer device.

With that in mind, you will need a simple 3-phase VFD, as a single device. They may be had with little fuss and at a reasonable cost. Such as:

https://www.automationdirect.com/adc...CZ6kQAvD_B wE

Only one of many options.

Do check that the motor is well-and-truly 3-phase, however.

Peter Wieck
Melrose Park, PA