1
Constantin C Stancu, Mark L Selogie: Multiple inverter system with single controller and related operating method. GM Global Technology Operations, October 2, 2007: US07277304 (83 worldwide citation)

A multiple DC-to-AC inverter system, which is suitable for an electric or hybrid vehicle application, includes a plurality of inverters controlled by a single controller. One example embodiment includes four three-phase inverters driving one six-phase motor, where the output of the first inverter is ...


2
Constantin C Stancu, Mark L Selogie: Multiple inverter system with single controller and related operating method. GM Global Technology Operations, May 13, 2008: US07372712 (83 worldwide citation)

Methods for controlling a multiple DC-to-AC inverter system, which is suitable for an electric or hybrid vehicle application, are disclosed. In one embodiment, if an inverter fails or suffers from degraded performance (faulty inverter), the faulty inverter is disabled and drive signals to a healthy ...


3
Silva Hiti, Constantin C Stancu, Dragan S Maric: System and method for controlling a surface-mounted permanent magnet synchronous machine drive over a wide speed range using a reference voltage. General Motors Corporation, Christopher DeVries, September 11, 2001: US06288515 (28 worldwide citation)

A surface-mounted permanent magnet synchronous machine drive and a method of controlling the machine drive. Flux weakening and current regulating loops cooperate to provide automatic transition to the flux weakening mode (operation above base speed), regardless of DC bus voltage, load or other opera ...


4
Silva Hiti, Constantin C Stancu: Method of controlling a voltage-fed induction machine. General Motors Corporation, Anthony Luke Simon, April 24, 2001: US06222335 (26 worldwide citation)

A control algorithm or method for use in controlling a voltage-fed induction machine. The control algorithm includes the following steps. The DC link voltage supplied to an inverter driving the induction machine is monitored. When the DC link voltage is high enough, the algorithm controls the amount ...


5
Silva Hiti, Constantin C Stancu, Dragan S Maric: Method and drive system for controlling a permanent magnet synchronous machine. General Motors Corporation, Anthony Luke Simon, December 19, 2000: US06163128 (25 worldwide citation)

A surface-mounted permanent magnet synchronous machine drive 10 and a method 30 of controlling the machine drive. Flux weakening and current regulating loops 70, 60 cooperate to provide automatic transition to the flux weakening mode (operation above base speed), regardless of DC bus voltage, load o ...


6
Brian Welchko, Jonathan B Huse, Silva Hiti, Brendan M Conlon, Constantin C Stancu, Khwaja M Rahman, David Tang, William R Cawthorne: Fault handling of inverter driven PM motor drives. GM Global Technology Operations, October 9, 2007: US07279862 (20 worldwide citation)

An apparatus includes a multi-phase inverter, a fault detector to indicate a detection of a fault, a sensor to provide a speed signal indicative of whether a speed of a PM motor is greater than a transition speed, and a controller. The controller is operable to apply either an open-circuit response ...


7
Khwaja M Rahman, Peter James Savagian, Francois J Biais, Constantin C Stancu: Method of fabricating a rotor for an electric traction motor. General Motors Corporation, Christopher DeVries, February 3, 2004: US06684483 (18 worldwide citation)

A method of fabricating a rotor for an electric traction motor including the steps of forming cavities in the rotor, injecting magnetic material in a portion of the cavities, injecting nonmagnetic material in a portion of the cavities, and post-magnetizing the magnetic material.


8
Constantin C Stancu, Silva Hiti, James Nagashima: Auxiliary power conversion for an electric vehicle using high frequency injection into a PWM inverter. General Motors Corporation, Anthony Luke Simon, July 17, 2001: US06262896 (17 worldwide citation)

An electric power system for an electric vehicle includes an electric drive motor, a high voltage bus for supplying operating power to energize the drive motor, and an inverter including power switching devices and having an inverter output. The inverter is coupled between the high voltage bus and t ...


9
Robert T Dawsey, Constantin C Stancu, Eric R Ostrom, Young Doo: Apparatus for cooling stator lamination stacks of electrical machines. GM Global Technology Operations, December 15, 2009: US07633194 (14 worldwide citation)

A coaxial stack of laminations for a stator of an electrical machine uses laminations that are substantially identical and in direct abutment with one another. Each of the laminations has an outer periphery and an inner periphery with the outer periphery being defined by an array of outwardly projec ...


10
Douglas S Carlson, Constantin C Stancu, James M Nagashima, Silva Hiti, Khwaja M Rahman: Auxiliary power conversion by phase-controlled rectification. General Motors Corporation, Christopher DeVries, September 9, 2003: US06617820 (13 worldwide citation)

A method of generating low voltage auxiliary power forms for electric or hybrid vehicle use by tapping power from the traction motor primary winding with a secondary winding and rectifier.