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1. US20090160296 - Polyphase Electric Machine

Office United States of America
Application Number 11886609
Application Date 02.03.2006
Publication Number 20090160296
Publication Date 25.06.2009
Publication Kind A1
IPC
H02K 7/10
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
KDYNAMO-ELECTRIC MACHINES
7Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
10Structural association with clutches, brakes, gears, pulleys or mechanical starters
H02K 21/22
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
KDYNAMO-ELECTRIC MACHINES
21Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
12with stationary armatures and rotating magnets
22with magnets rotating around the armatures, e.g. flywheel magnetos
Inventors Steinbock Stefan
Groening Ingolf
Kaehler Christian
Agents KENYON &; KENYON LLP
Priority Data 102005012503 16.03.2005 DE
102005032122 07.07.2005 DE
Title
(EN) Polyphase Electric Machine
Abstract
(EN)

A polyphase electric machine includes a stator impinged by an electromagnetic rotating field, which has a yoke having yoke teeth having at least partially peripheral slots, in which windings generating a magnetic field are situated, and having a rotor rotatable around an axis having permanent magnets, which is peripherally separated from the stator by an air gap, the rotor being fixedly connected to a pulley, the yoke teeth in the stator being assembled into modules, whose number is equal to the current phases or corresponds to their integral multiple, each module including a number of at least one yoke tooth and—in the event of a possible pole pitch of the rotor to slot pitch of the stator ratio of 9/8—yoke teeth of a module directly neighboring one another having opposite magnetic field polarity. Using this system, an electric drive having a particularly flat construction, in particular for an elevator drive, may be implemented, which has increased force density and simultaneously significantly reduced torque ripple.

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