The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2006
Filed:
Mar. 14, 2005
Zhenxing Fu, Ann Arbor, MI (US);
Karienne A. Yockey, Ypsilanti, MI (US);
Frank J. Aiello, Canton, MI (US);
James R. Winkelman, Bloomfield, MI (US);
Frank J. Haas, Northville, MI (US);
Zhenxing Fu, Ann Arbor, MI (US);
Karienne A. Yockey, Ypsilanti, MI (US);
Frank J. Aiello, Canton, MI (US);
James R. Winkelman, Bloomfield, MI (US);
Frank J. Haas, Northville, MI (US);
Visteon Global Technologies, Inc., Van Buren Township, MI (US);
Abstract
An apparatus for determining angular positions of DC motor includes a capacitor connected in parallel with the DC motor. The current flowing through the capacitor, at any given time, is an AC ripple current responsive to a commutation event of the DC motor. The capacitor partially sources the motor current ripples during commutation and recharges itself during the off-commutation period. Since the number of commutation events per mechanical revolution is pre-determined once the DC motor is designed, the frequency of the AC ripple currents through the capacitor corresponds to the frequency of commutation, and thus a motor position of the DC motor.