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:
May. 03, 2005
Filed:
Aug. 22, 2002
John Makaran, Ontario, CA;
John Makaran, Ontario, CA;
Siemens VDO Automotive Inc., Mississauga, CA;
Abstract
A circuitfor a five phase DC brushless motor includes a first coil A and a first primary switch Sfor controlling current through the first coil; a second coil B and a second primary switch Sfor controlling current through the second coil; a third coil C and a third primary switch Sfor controlling current through the third coil; a fourth coil D and a fourth primary switch Sfor controlling current through the fourth coil; a fifth coil E and a fifth primary switch Sfor controlling current through the fifth coil. The first coil A is arranged to have a polarity of back EMF opposite of that of the third coil C; the second coil B is arranged to have a polarity of back EMF opposite of that of the fourth coil D; the third coil C is arranged to have a polarity of back EMF opposite of that of the fifth coil E, the fourth coil D is arranged to have a polarity of back EMF opposite of that of the first coil A; and the fifth coil E is arranged to have a polarity of back EMF opposite of that of the second coil B. The circuit further includes a first freewheeling current conducting switch Sand a diode A between the first coil and the third coil; a second freewheeling current conducting switch Sand a diode between the second coil and the fourth coil; a third freewheeling current conducing switch Sand a diode between the third coil and the fifth coil; a fourth freewheeling current conducting switch Sand a diode between the fourth coil and the first coil, and a fifth freewheeling current conducting switch Sand diode between the fifth coil and the second coil.