Patent ID: 8638059

Claim:
A method of controlling operation of a multi-phase induction motor comprising: transmitting a high-speed operation signal by a master computer for high-speed operation of said motor; receiving said high-speed operation signal by a control signal board, and in response to said high-speed operation signal, said control signal board sensing that said master computer is not simultaneously transmitting a low-speed operation signal, and in response to receiving said high-speed operation signal and not simultaneously receiving said low-speed operation signal, closing delta-to-wye contactors and closing contactors in a power section to transmit power to said motor for high-speed operation, whereby said motor is connected to a source of multi-phase power and operates at high-speed; and said control signal board transmitting a first feedback signal to said master computer that said motor is connected to said source of multi-phase power and is running at high speed.