Estimating input currents provided to an electric motor

An Electric Control Unit (ECU) configured to control a motor system, the ECU configured to store computer logic having instructions that, when executed, cause one or more processing devices to:

• determine a change in duty cycle of a switching waveform applied to one or more switches of a power electronics circuit of the motor system, the change in duty cycle being based on a difference between a first duty cycle of an output of a control module of the ECU and a second duty cycle of an output of an embedded module of the ECU that is fed back from the embedded module to the control module via a feedback loop in the ECU;
• obtain, based at least in part on the change in duty cycle of the switching waveform, a duty cycle parameter at an output of the ECU, wherein the duty cycle parameter relates to control actions enforced on the one or more switches;
• and
• estimate, based on the duty cycle parameter obtained at the output of the ECU, an input current provided to one of multiple phases of an electric motor of the motor system.

A method, comprising:

• determining a change in duty cycle of a switching waveform applied to one or more switches of a power electronics circuit of a motor system, the change in duty cycle being based on a difference between a first duty cycle of an output of a control module of an electronic control unit (ECU) configured to control the motor system and a second duty cycle of an output of an embedded module of the ECU that is fed back from the embedded module to the control module via a feedback loop in the ECU;
• obtaining, based at least in part on the change in duty cycle of the switching waveform, a duty cycle parameter at an output of the ECU, wherein the duty cycle parameter relates to control actions enforced on the one or more switches;
• and
• estimating, based on the duty cycle parameter obtained at the output of the ECU, an input current provided to one of multiple phases of an electric motor of the motor system.