Gm Global Technolgoy Operations, Inc.

Dana Corporation

Advanced Energy Conversion, LLC

Erkan Mese

David Allan Torrey

Mohammad N Anwar

Yilmaz Sozer

Embodiments include a power processing system and methods of its operation in a plug-in electric vehicle. The power processing system includes at least one AC electric motor, a bi-directional inverter system, and an electronic control system. The electronic control system provides a drive function by providing first control signals to the bi-directional inverter system which, in response, draws DC electrical power from a DC energy source, converts the DC power to AC power, and provides the AC power to windings of the at least one AC electric motor. The electronic control system also provides a charging function by providing second control signals to the bi-directional inverter system which, in response, draws AC power from the windings of the at least one AC electric motor, converts the AC power to DC power, and provides the DC power to the DC energy source in order to recharge the DC energy source.

Power processing systems and methods for use in plug-in electric vehicles

An apparatus for space vector modulation of a multi-level inverter, the apparatus comprising: a triangle generator for finding a modulation triangle enclosing a reference voltage vector, the modulation triangle comprising vertex vectors; a duty ratio calculator for determining duty ratios for the vertex vectors; a switching function selector for selecting switching functions corresponding to the vertex vectors; a forbidden transition identifier for identifying a forbidden transition between two of the vertex vectors; and a control module for applying the switching functions to the multi-level inverter according to the duty ratios and avoiding the forbidden transition.

Method and apparatus for space vector modulation in multi-level inverters

A control algorithm provides automatic control of the turn-on angle used to excite the switched-reluctance motor (SRM). The control algorithm determines the turn-on angle that supports the most efficient operation of the motor drive system, and consists of two pieces. The first piece of the control technique monitors the position of the first peak of the phase current (&thgr; ) and seeks to align this position with the angle where the inductance begins to increase (&thgr; ). The second piece of the controller monitors the peak phase current and advances the turn-on angle if the commanded reference current cannot be produced by the controller. The first piece of the controller tends to be active below base speed of the SRM, where phase currents can be built easily by the inverter and &thgr; is relatively independent of &thgr; . The second piece of the controller tends to be active above base speed, where the peak of the phase currents tends to naturally occur at &thgr; , regardless of the current amplitude. The two pieces of the controller naturally exchange responsibility as a result of a change in command or operating point.

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Rochester Hills, MI, United States of America

Erkan Mese