Patent ID: 9225264
Filing Date: 2015-12-29
Classification: H02M

Abstract:
1. A control apparatus for controlling a multiphase inverter, comprising: a controller for controlling an electrical output condition of the multiphase inverter, the controller operable to generate pulse width modulation switching control signals to selectively operate a plurality of high and low side switching devices of the multiphase inverter at least partially according to a plurality of phase current feedback values individually corresponding to one of a plurality of output phases of the multiphase inverter; a computation circuit for selectively computing one of the phase current feedback values, the computation circuit operable to identify a given phase of the multiphase inverter having a lowest low side duty cycle on-time in a given pulse width modulation switching cycle, selectively compute a given phase current feedback value corresponding to the given phase at least partially according to low side current shunt voltage values corresponding to remaining output phases of the multiphase inverter, and selectively update the plurality of phase current feedback values with the given phase current feedback value and the low side current shunt voltage values corresponding to the remaining output phases.