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Class Information
Number: 318/244
Name: Electricity: motive power systems > Alternating current commutating motors
Description: Subject matter in which the motor is an alternating-current commutation motor.

Sub-classes under this class:

Class Number Class Name Patents
318/245 Universal or a.c.-d.c. motors 147

Patents under this class:
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Patent Number Title Of Patent Date Issued
8562304 Electrical motor activation method having load torque adaptation Oct. 22, 2013
8466639 Motion control system self-calibrating Jun. 18, 2013
8461786 Method and device for determining the position of a mobile closing part of a vehicle Jun. 11, 2013
8421382 Apparatus motor control method Apr. 16, 2013
8344683 Apparatus for sensorless positioning with signal amplifier Jan. 1, 2013
8314586 System for adapting the resonant operation of a personal care appliance during the lifetime thereof Nov. 20, 2012
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
8179072 Method for counting the number of revolutions of a burr of a coffee mill and appliance comprising such a mill May. 15, 2012
8076873 Hybrid outdoor power equipment Dec. 13, 2011
8067913 Power tool Nov. 29, 2011
8011902 Drive control device of fuel pump Sep. 6, 2011
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
7800321 Method for the detection of the rotational position of the rotor of a DC motor with commutator Sep. 21, 2010
7781994 Method and circuit for regulating the speed of a commutator series-wound motor Aug. 24, 2010
7733237 Signaling device and method of controlling the device Jun. 8, 2010
7696705 Method for measuring the rotational speed of an EC motor Apr. 13, 2010
7545070 Commutator motor having a number of field winding groups Jun. 9, 2009
7521888 Electric motor controller for a domestic appliance Apr. 21, 2009
7330004 Method and apparatus for quiet variable motor speed control Feb. 12, 2008
7323839 Direct current motor controlling method Jan. 29, 2008
7262570 Motor controller with enhanced noise immunity unbuffered hall sensors Aug. 28, 2007
7129657 Single track brush-based position encoder for rotating shaft Oct. 31, 2006
7106013 Motor drive apparatus driving 3-phase brushless motor without using hall sensor Sep. 12, 2006
7064509 Apparatus for DC motor position detection with capacitive ripple current extraction Jun. 20, 2006
7034477 Domestic electrical appliance including an electric motor Apr. 25, 2006
6873124 Rotational speed controller for electrically powered tools Mar. 29, 2005
6864648 Vector flux machine Mar. 8, 2005
6838830 Half-bridge Jan. 4, 2005
6798162 12/42 volt DC brush motor control system Sep. 28, 2004
6664750 D.C. motor bridge coil driver Dec. 16, 2003
6580874 Field current control method in motor Jun. 17, 2003
6448727 Mains braking device for a line-powered power tool Sep. 10, 2002
6380702 Commutator motor control system Apr. 30, 2002
6353297 Series motor Mar. 5, 2002
6326757 Rotational pulse generating circuit for commutator DC motors Dec. 4, 2001
6252363 Circuit for timed position control of device driven by a DC motor Jun. 26, 2001
6191542 Method and apparatus for cleaning a DC motor commutator-brush interface Feb. 20, 2001
6172472 Control system for a two-terminal electric motor connected to a voltage network having two lines Jan. 9, 2001
6172473 Device for determining rotational number of DC motors Jan. 9, 2001
6130533 Fan speed detecting circuit Oct. 10, 2000
5994860 Series wound motor with electrical brake Nov. 30, 1999
5990639 Phase controller for intermittently supplying an AC motor with electric power Nov. 23, 1999
5856731 Electric screwdriver Jan. 5, 1999
5760553 Speed control method for an electric motor Jun. 2, 1998
5646497 Switching arrangement for controlling the rpm of electric motors Jul. 8, 1997
5432421 Process for detecting the position, direction of movement and dynamic characteristic values of remote-controlled displacement of an adjustable object Jul. 11, 1995
5196747 Universal electric motor Mar. 23, 1993

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