US 7,554,249 B2
	Electric motor
Hans Braun, Leuven (Belgium); Ning Qu, Reutlingen (Germany); Klaus Heyers, Reutlingen (Germany); Heinz Eisenschmid, Ditzingen-Horschlanden (Germany); Carsten Raudzis, Leinfelden-Echterdingen (Germany); and Frank Schatz, Kornwestheim (Germany)
Assigned to Robert Bosch GmbH, Stuttgart (Germany)
Appl. No. 10/541,783 PCT Filed Apr. 14, 2004, PCT No. PCT/DE2004/000776 § 371(c)(1), (2), (4) Date Jul. 11, 2005, PCT Pub. No. WO2004/093102, PCT Pub. Date Oct. 28, 2004.
Claims priority of application No. 103 17 466 (DE), filed on Apr. 16, 2003.
Prior Publication US 2006/0138778 A1, Jun. 29, 2006
Int. Cl. H02K 3/46 (2006.01)

U.S. Cl. 310—354  [318/400.03]

16 Claims

1. An electric motor, in particular a starter device for internal combustion engines in which an electric resistor (57) with a negative temperature coefficient is connected at the beginning of the main current path (49) of an electromagnetically excitable rotor (53) of the electric motor (16), wherein the electric resistor (57) contains at least one monocrystalline semiconductor, wherein the monocrystalline semiconductor (90, 93) is comprised of high-doped silicon and at least one region (92) with low doping that is monocrystalline and is produced by means of epitaxy.