Technologies for redundant shaft information feedback in electric machine systems including a resolver

A method for controlling operation of a power converter, the method comprising:

• determining, by a first converter controller, whether a notification from a second converter controller has been received over a communication bus coupled to the first converter controller and the second converter controller, wherein the notification indicates that a resolver-to-digital converter (RDC) of the second converter controller has been activated and wherein the RDC of the second converter controller is communicatively coupled to a resolver coupled to a shaft of a multi-phase electric machine of a motor drive system;
• receiving, by the first converter controller over the communication bus and subsequent to receiving the notification, digital output signals from the second converter controller, wherein the digital output signals are indicative of an angle and a speed of the shaft;
• and
• controlling, by the first converter controller and in response to receiving the digital output signals, a power converter coupled to a set of windings of the multi-phase electric machine based on the received digital output signals.

A method for controlling operation of a plurality of power converters, the method comprising:

• receiving, by a first resolver-to-digital converter (RDC) of a first converter controller, analog output signals from a resolver coupled to a shaft of a multi-phase electric machine;
• converting, by the first RDC, the analog output signals to first digital output signals indicative of an angle and a speed of the shaft;
• controlling, by the first converter controller and based on the first digital output signals, operation of a first power converter coupled to a first set of windings of the multi-phase electric machine;
• transmitting, by a transceiver of a communication circuit of the first converter controller and over a communication bus, the first digital output signals to a second converter controller and a third converter controller, wherein the transceiver of the communication circuit of the first converter controller is set to transmit;
• receiving, by a transceiver of a communication circuit of the second converter controller communicatively coupled to the communication bus, the first digital output signals, wherein the transceiver of the communication circuit of the second converter controller is set to receive;
• controlling, by the second converter controller and based on the first digital output signals, operation of a second power converter coupled to a second set of windings of the multi-phase electric machine;
• receiving, by a receiver of a communication circuit of the third converter controller communicatively coupled to the communication bus, the first digital output signals;
• and
• controlling, by the third converter controller and based on the first digital output signals, operation of a third power converter coupled to a third set of windings of the multi-phase electric machine.