Curtis Paul Cyran

US Patent:

6842014, Jan 11, 2005

Filed:

Apr 10, 2003

Appl. No.:

10/410858

Inventors:

Thomas A. Baudendistel - Farmersville OH, US
Donald T. Morelli - White Lake MI, US
Bruce Heaston - West Milton OH, US
Curtis Cyran - Dayton OH, US
Jeff A. Foust - Eaton OH, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

G01R 1152
G01R 2726

US Classification:

324654, 32420715

Abstract:

A resistor (having a resistance of R) is connected in series with an inductor whose inductance and/or resistance is desired to be determined. An alternating voltage (such as a sinusoidal voltage) is applied across the series-connected resistor and inductor, wherein the alternating voltage has a frequency ω, a unique maximum or minimum value V, an average value and a unique crossover of the average value. The voltage Vis measured across the resistor when the alternating voltage is at its maximum or minimum value. The voltage Vis measured across the resistor when the alternating voltage is at its average value. The resistance Rof the inductor is calculated from an equation in which Ris a function of V, V, Rand V. The inductance L of the inductor is calculated from an equation in which L is a function of V, R, R, Vand ω.

US Patent:

6972560, Dec 6, 2005

Filed:

Apr 22, 2003

Appl. No.:

10/420496

Inventors:

Thomas A. Baudendistel - Farmersville OH, US
Robert J. Disser - Dayton OH, US
Curtis Cyran - Dayton OH, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

G01B007/24
G01R033/18

US Classification:

324209, 73799, 7386269

Abstract:

A method for detecting a change in permeability of a magnetostrictive object due to a change in strain. At least one first coil and at least one second coil are obtained and positioned such that magnetic flux lines induced by an electric current in the first coil(s) pass through at least one portion of the object in a direction substantially parallel to the strain direction, such that magnetic flux lines induced by an electric current in the second coil(s) pass through at least one portion of the object in a direction substantially parallel to the strain direction, and such that any electromagnetic interference sensed by the first coil(s) is sensed oppositely by the second coil(s). The total inductance of the positioned first and second coil(s) is measured over time. A change in permeability of the object is detected from a change in the measured total inductance over time.

US Patent:

7612520, Nov 3, 2009

Filed:

Mar 5, 2007

Appl. No.:

11/713839

Inventors:

Curtis P. Cyran - Dayton OH, US
Robert J. Disser - Dayton OH, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

H02P 21/00

US Classification:

318806, 318727, 318767

Abstract:

Method for operating a delta wound three-phase permanent magnet brushless motor. A transition speed is determined in a quadrant of a speed versus torque curve above which speed continues to increase while current/torque decreases wherein actual phase current can be controlled in a current control modification manner which reduces requested phase current. The modification manner is determined for a quadrant, wherein a controller can use the modification manner to reduce the requested phase current to control the actual phase current when the speed is above the transition speed. The motor is controlled in a quadrant wherein, when the motor has a speed above the transition speed, the controller reduces the requested phase current in the modification manner and the controller supplies the actual phase current to the motor using the reduced requested phase current and using measured phase current of the motor derived from using a single current sense resistor.

US Patent:

20050083046, Apr 21, 2005

Filed:

Oct 8, 2004

Appl. No.:

10/961450

Inventors:

Curtis Cyran - Dayton OH, US
Robert Disser - Dayton OH, US

International Classification:

G01B007/24

US Classification:

324209000

Abstract:

A method and circuit for detecting a change in inductance of a variable inductance element. An oscillating signal has a frequency that varies with inductance of the element. An intermediate voltage is produced at a level that varies according to frequency of the oscillating signal. The intermediate voltage is scaled to produce an output voltage.

US Patent:

20050088183, Apr 28, 2005

Filed:

Sep 29, 2004

Appl. No.:

10/953781

Inventors:

Thomas Baudendistel - Farmersville OH, US
Donald Morelli - White Lake MI, US
Bruce Heaston - West Milton OH, US
Curtis Cyran - Dayton OH, US
Jeff Foust - Eaton OH, US

International Classification:

H02M003/335

US Classification:

324654000

Abstract:

A resistor (having a resistance of R) is connected in series with an inductor whose inductance and/or resistance is desired to be determined. An alternating voltage (such as a sinusoidal voltage) is applied across the series-connected resistor and inductor, wherein the alternating voltage has a frequency ω, a unique maximum or minimum value V, an average value and a unique crossover of the average value. The voltage Vis measured across the resistor when the alternating voltage is at its maximum or minimum value. The voltage Vis measured across the resistor when the alternating voltage is at its average value. The resistance Rof the inductor is calculated from an equation in which Ris a function of V, V, Rand V. The inductance L of the inductor is calculated from an equation in which L is a function of V, R, R, Vand ω.

US Patent:

6803773, Oct 12, 2004

Filed:

Jul 8, 2003

Appl. No.:

10/615570

Inventors:

Curtis P. Cyran - Dayton OH
Robert J. Disser - Dayton OH

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

G01R 2728

US Classification:

324656, 324654, 324 7675

Abstract:

A method and circuit for detecting a change in inductance of a variable inductance element. An oscillating signal has a frequency that varies with inductance of the element. An intermediate voltage is produced at a level that varies according to frequency of the oscillating signal. The intermediate voltage is scaled to produce an output voltage.