Kerry E Grand

Address:

52153 Boland Rd, Chesterfield, MI 48047

Phone:

586 725-2332

VIN:

3FAHP0HA1BR273274

Make:

FORD

Model:

FUSION

Year:

2011

US Patent:

6630809, Oct 7, 2003

Filed:

Nov 29, 2001

Appl. No.:

09/683180

Inventors:

Li Chen - Livonia MI
Xingyi Xu - Canton MI
Vinod Reddy - Ocala FL
Richard Joseph Hampo - Plymouth MI
Kerry Eden Grand - Chesterfield MI

Assignee:

Ballard Power Systems Corporation - Dearborn MI

International Classification:

H02P 764

US Classification:

318804, 318800, 318801

Abstract:

Field oriented induction motor system including a field oriented induction motor having an associated torque current and an associated flux current and a predetermined current ratio, wherein the predetermined current ratio is defined as the ratio of the torque current to the flux current, and wherein the predetermined current ratio is dependent upon the saturation state of the motor. A method for selecting the ratio of torque current to flux current for a field oriented induction motor including applying an allocation factor to the torque current and flux current, wherein the allocation factor is dependent upon the saturation state of the motor. The saturation state of the motor is determined based upon motor parameters.

US Patent:

6631960, Oct 14, 2003

Filed:

Nov 28, 2001

Appl. No.:

09/683171

Inventors:

Kerry Eden Grand - Chesterfield MI
Vinod Reddy - Ocala FL

Assignee:

Ballard Power Systems Corporation - Dearborn MI

International Classification:

B60T 864

US Classification:

303152, 303163

Abstract:

Regenerative braking systems and methods for use in an electric vehicle, such as a battery-powered vehicle, a fuel cell vehicle, and a hybrid electric vehicle, including an electric motor system operable for generating torque to drive and control the electric vehicle, a traction controller operable for controlling the electric motor system, a brake system operable for generating torque to drive and control the electric vehicle, and a brake controller operable for controlling the brake system. Traction functions are strictly allocated to the traction controller, braking functions are strictly allocated to the brake controller, and the brake controller is subordinated to the traction controller. The regenerative braking systems and methods also including a communications system operable for transferring information between the traction controller and the brake controller.

US Patent:

6707270, Mar 16, 2004

Filed:

Nov 13, 2001

Appl. No.:

10/010307

Inventors:

Li Chen - Livonia MI
Kerry Eden Grand - Chesterfield MI
Richard Joseph Hampo - Plymouth MI
Vinod Reddy - Ocala FL
Xingyi Xu - Canton MI
Nick Langovsky - Inkster MI

Assignee:

Ballard Power Systems Corporation - Dearborn MI

International Classification:

H02P 736

US Classification:

318798, 318806, 318808

Abstract:

System and method for enhancing the torque output of a field oriented induction motor including a controller having a plurality of predetermined control parameters operable for processing input signals to generate output signals. The plurality of predetermined control parameters are dependent upon the nature of the input signals and the operational state of the motor. A sensor system is operable for communicating feedback signals related to the output signals and the operational state of the motor from the motor to the controller.

US Patent:

6815925, Nov 9, 2004

Filed:

Nov 12, 2002

Appl. No.:

10/293911

Inventors:

Li Chen - Livonia MI
Xingyi Xu - Canton MI
Vinod Reddy - Ocala FL
Richard J. Hampo - Plymouth MI
Kerry E. Grand - Chesterfield MI

Assignee:

Ballard Power Systems Corporation - Dearborn MI

International Classification:

H02P 124

US Classification:

318727, 318767, 318772, 318798, 318804, 318801

Abstract:

Systems and methods for controlling and/or calculating the torque for a field oriented induction motor operating at a given stator frequency. The systems and methods include calculating the torque using a first algorithm when the motor is at or below a first predetermined stator frequency, a second algorithm when the motor is at or above a second predetermined stator frequency, and a third algorithm when the motor is between the first predetermined stator frequency and the second predetermined stator frequency.

US Patent:

6900643, May 31, 2005

Filed:

Aug 6, 2003

Appl. No.:

10/637754

Inventors:

Duo Deng - Canton MI, US
Kerry E. Grand - Chesterfield MI, US
Steven J. Kowalec - Plymouth MI, US

Assignee:

Ballard Power Systems Corporation - Dearborn MI

International Classification:

G01R031/08
H02M003/00

US Classification:

324522, 363 74

Abstract:

A system including a current sensor to sense a current provided by an electronic power converter, the current sensor includes an output; an overcurrent detection circuit with an input coupled to an output of the current sensor; and a logic control circuit configurable to maintain the current provided by the electronic power converter in response to the sensed current having a short circuit magnitude, the logic control circuit including an input coupled to an output of the overcurrent detection circuit and at least one output coupled to at least one switch of the electronic power converter.

US Patent:

7158395, Jan 2, 2007

Filed:

Apr 30, 2004

Appl. No.:

10/836631

Inventors:

Duo Deng - Canton MI, US
Anil Tuladhar - Dearborn Heights MI, US
Kenneth J. Farkas - Brighton MI, US
Kerry E. Grand - Chesterfield MI, US

Assignee:

Ballard Power Systems Corporation - Dearborn MI

International Classification:

H02M 7/44

US Classification:

363 95

Abstract:

A power system employs an outer voltage feedback loop and an inner current feedback loop to control a power converter, such as a DC to AC inverter for transferring electrical power between a power source, for example a photovoltaic array, and a load, for example a power grid. The outer loop accommodates variations in the output of the power source, for example accommodating anomalies in IV characteristics such as IV droop characteristic associated with photovoltaic cells. The outer loop may employ a first control regime or a second control regime, for example, dependent on whether a DC bus voltage or power is smaller than a value corresponding to measurement resolution or expected noise.

US Patent:

7190145, Mar 13, 2007

Filed:

Dec 30, 2002

Appl. No.:

10/334198

Inventors:

Kerry E. Grand - Chesterfield MI, US
Richard J. Hampo - Plymount MI, US
Yifan Zhao - Belleville MI, US

Assignee:

Ballard Power Systems Corporation - Dearborn MI

International Classification:

G01P 3/481
G01P 3/66
H02P 6/08

US Classification:

318721, 318138, 318254, 318439, 318490, 324173, 324179

Abstract:

A method and apparatus for improving speed measurement quality in systems having multi-pole machines is taught. The method compensates for pole misalignment by computing speed based upon moving average techniques. In one embodiment, a moving average speed averaged over a complete interval of rotation is determined, based upon measurements of one or more magnetic pole position sensors for magnetic pole location. In another embodiment, a time interval between two poles is averaged over one or more rotational periods, and the average time interval is used to determine the moving average speed. Computation of the moving average speed reduces errors in speed measurements due to pole misalignment and may provide for smaller control adjustment times for controlling motor speed variability. In one embodiment, the speed measurement system includes a multi-pole rotor, and a controller having a capture timer and a buffer.

US Patent:

7256566, Aug 14, 2007

Filed:

Apr 30, 2004

Appl. No.:

10/836121

Inventors:

Vijay Bhavaraju - Canton MI, US
Kerry E. Grand - Chesterfield MI, US
Anil Tuladhar - Dearborn Heights MI, US

Assignee:

Ballard Power Systems Corporation - Dearborn MI

International Classification:

H01M 10/44

US Classification:

320101

Abstract:

The maximum power point (MPP) of a photovoltaic array that can be coupled to power inverter is determined. A capacitor on a DC-bus side of the inverter is used as a load from which I-V characteristics of the photovoltaic array can be generated. The photovoltaic array is connected to the capacitor, which has been previously discharged by a bleed down resistor. Short circuit current, open circuit voltage, and values of current and voltage as the capacitor charges are determined and used to generate I-V characteristics of the photovoltaic array. From the I-V characteristics, the MPP can be calculated.