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Class Information
Number: 318/245
Name: Electricity: motive power systems > Alternating current commutating motors > Universal or a.c.-d.c. motors
Description: Subject matter in which the motor is designed and constructed to run when connected directly and solely to either a direct-current or an alternating-current source.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8615837 Motorized drain cleaning machine with speed controller Dec. 31, 2013
8571394 Method and apparatus for controlling the position of an electric motor Oct. 29, 2013
8562304 Electrical motor activation method having load torque adaptation Oct. 22, 2013
8461786 Method and device for determining the position of a mobile closing part of a vehicle Jun. 11, 2013
8450954 Electronically controlled universal motor May. 28, 2013
8421382 Apparatus motor control method Apr. 16, 2013
8415911 Power tool with a DC brush motor and with a second power source Apr. 9, 2013
8344683 Apparatus for sensorless positioning with signal amplifier Jan. 1, 2013
8294412 Method for controlling a rotary electric machine in case of load shedding and corresponding power control module Oct. 23, 2012
8294399 Motor controller and electric tool having the same Oct. 23, 2012
8264186 Control devices for fuel pump driving motors Sep. 11, 2012
8193744 Method and apparatus for quiet fan speed control Jun. 5, 2012
8179072 Method for counting the number of revolutions of a burr of a coffee mill and appliance comprising such a mill May. 15, 2012
7986115 Safety device for detecting inadequate electric braking and commutation to a safety brake Jul. 26, 2011
7982418 Rheostatic safety braking device having a bipolar resistive assembly with permanent magnet motor Jul. 19, 2011
7851954 Vehicle drive device Dec. 14, 2010
7800321 Method for the detection of the rotational position of the rotor of a DC motor with commutator Sep. 21, 2010
7786687 Apparatus and method for control of an active front steering (AFS) system Aug. 31, 2010
7781994 Method and circuit for regulating the speed of a commutator series-wound motor Aug. 24, 2010
7772729 Selectively configurable electric motor Aug. 10, 2010
7671549 Method and apparatus for quiet fan speed control Mar. 2, 2010
7589483 Motor control Sep. 15, 2009
7521888 Electric motor controller for a domestic appliance Apr. 21, 2009
7518324 Universal motor speed controller Apr. 14, 2009
7489094 Method and apparatus for quiet fan speed control Feb. 10, 2009
7330004 Method and apparatus for quiet variable motor speed control Feb. 12, 2008
7323839 Direct current motor controlling method Jan. 29, 2008
7274866 Power tool and method for controlling a power tool Sep. 25, 2007
7190129 System and method for drift compensation when using pulse count controlled motors Mar. 13, 2007
7183734 Sensorless control of two-phase brushless DC motor Feb. 27, 2007
7145302 Method and apparatus for driving a brushless direct current motor Dec. 5, 2006
7145308 Floating armature electric motor and method of assembly Dec. 5, 2006
7141944 Device and method for controlling an electrical motor mounted on the crossarm of a bridge circuit Nov. 28, 2006
7138776 Method and apparatus for controlling brushless DC motors in implantable medical devices Nov. 21, 2006
7129657 Single track brush-based position encoder for rotating shaft Oct. 31, 2006
7084590 Booster and motor controller Aug. 1, 2006
7034477 Domestic electrical appliance including an electric motor Apr. 25, 2006
6995534 Method of controlling the commutation in an electronically commutated motor, and an electronically commutated motor for carrying out said method Feb. 7, 2006
6960895 Coupled RFI choke as stall detection means for brush type DC motor Nov. 1, 2005
6879124 Method to detect the true zero-crossing points of the phase back EMF for sensorless control of brushless DC motors Apr. 12, 2005
6798162 12/42 volt DC brush motor control system Sep. 28, 2004
6791290 Electrohydraulic converter Sep. 14, 2004
6765359 Controlling device for AC/DC driven motor Jul. 20, 2004
6718125 BLDC motor noise reduction using constant bus current control commutation Apr. 6, 2004
6628893 DC motor rotation control apparatus Sep. 30, 2003
6617816 DC motor rotation detecting apparatus and DC motor rotation control apparatus Sep. 9, 2003
6617737 Apparatus and method of powering light source Sep. 9, 2003
6614197 Odd harmonics reduction of phase angle controlled loads Sep. 2, 2003
6614194 Motor fan control apparatus Sep. 2, 2003
6525495 Electronic device for controlling the electromagnetic self-braking current in reversible rotating electric commutator machines Feb. 25, 2003

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