DOE Patents Database - Search Results

Patent Title	Inventor(s)	Issue Date	Patent Number
Methods, system and apparatus are provided for increasing voltage utilization in a five-phase vector controlled machine drive system that employs third harmonic current injection to increase torque and power output by a five-phase machine. To do so, a fundamental current angle of a fundamental current vector is optimized for each particular torque-speed of operating point of the five-phase machine. Methods, systems and apparatus for optimization of third harmonic current injection in a multi-phase machine	Gallegos-Lopez, Gabriel	10/02/2012	8,278,850
Methods, systems and apparatus are provided for controlling operation of and regulating current provided to a five-phase machine when one or more phases has experienced a fault or has failed. In one implementation, the disclosed embodiments can be used to synchronously regulate current in a vector controlled motor drive system that includes a five-phase AC machine, a five-phase inverter module coupled to the five-phase AC machine, and a synchronous current regulator. Methods, systems and apparatus for synchronous current regulation of a five-phase machine	Gallegos-Lopez, Gabriel , Perisic, Milun	10/09/2012	8,283,881
A system is provided for controlling two AC machines. The system comprises a DC input voltage source that provides a DC input voltage, a voltage boost command control module (VBCCM), a five-phase PWM inverter module coupled to the two AC machines, and a boost converter coupled to the inverter module and the DC input voltage source. The boost converter is designed to supply a new DC input voltage to the inverter module having a value that is greater than or equal to a value of the DC input voltage. The VBCCM generates a boost command signal (BCS) based on modulation indexes from the two AC machines. The BCS controls the boost converter such that the boost converter generates the new DC input voltage in response to the BCS. When the two AC machines require additional voltage that exceeds the DC input voltage required to meet a combined target mechanical power required by the two AC machines, the BCS controls the boost converter to drive the new DC input voltage generated by the boost converter to a value greater than the DC input voltage. Methods, systems and apparatus for controlling operation of two alternating current (AC) machines	Gallegos-Lopez, Gabriel , Nagashima, James M. , Perisic, Milun , Hiti, Silva	02/14/2012	8,115,430
A system is provided for controlling two alternating current (AC) machines via a five-phase PWM inverter module. The system comprises a first control loop, a second control loop, and a current command adjustment module. The current command adjustment module operates in conjunction with the first control loop and the second control loop to continuously adjust current command signals that control the first AC machine and the second AC machine such that they share the input voltage available to them without compromising the target mechanical output power of either machine. This way, even when the phase voltage available to either one of the machines decreases, that machine outputs its target mechanical output power. Methods, systems and apparatus for controlling operation of two alternating current (AC) machines	Gallegos-Lopez, Gabriel , Nagashima, James M. , Perisic, Milun , Hiti, Silva	06/05/2012	8,193,747
Methods, system and apparatus are provided for quickly approximating a peak summed magnitude (A) of a phase voltage (Vph) waveform in a multi-phase system that implements third harmonic injection. Methods, systems and apparatus for approximation of peak summed fundamental and third harmonic voltages in a multi-phase machine	Ransom, Ray M. , Gallegos-Lopez, Gabriel , Kinoshita, Michael H.	07/31/2012	8,233,295

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