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Class Information
Number: 318/254.1
Name: Electricity: motive power systems >

Sub-classes under this class:

Class Number Class Name Patents
318/1 Electric motor with nonmotor driving means (e.g., axle drive, manual drive) 10
318/114 Impact, mechanical shock, or vibration-producing motors 169
318/115 Motor with diverse motions (e.g., rotary and reciprocating) 60
318/116 Nonmagnetic motor 255
318/118 Magnetostrictive motor 63
318/119 Reciprocating or oscillating motor 119
318/135 Linear-movement motors 707
318/136 Auxiliary means for producing mechanical starting or accelerating torque 12
318/138 Space-discharge-device commutated motor 1,487
318/139 Battery-fed motor systems 1,256
318/140 Generator-fed motor systems having generator control 165
318/159 Having rotor element biased against rotation 21
318/16 Supplied or controlled by space-transmitted electromagnetic or electrostatic energy (e.g., by radio) 276
318/161 With flywheel or massive rotary member 65
318/162 Control by patterns or other predetermined schedule means 38
318/17 Portable-mounted motor and/or portable-mounted electrical systems therefor 62
318/244 Alternating current commutating motors 57
318/246 Series motors 40
318/253 Homopolar or uniform field motors 5
318/254 Self-commutated impulse or reluctance motors 2,683
318/255 Plural diverse motor controls 67
318/280 Motor-reversing 539
318/3 With particular motor-driven load device 99
318/34 Plural, diverse or diversely controlled electric motors 296
318/362 Braking 196
318/383 "anti-braking" or braking-prevention means 11
318/430 Motor load, armature current or force control during starting and/or stopping 379
318/432 Constant motor current, load and/or torque control 1,453
318/434 Limitation of motor load, current, torque or force (e.g., preventing overload) 1,374
318/436 Nonrunning, energized motor 60
318/437 Phasing or angular or linear positional control of movable element of the motor 122
318/438 Power factor control of armature or line circuit 100
318/439 Motor commutation control systems 1,435
318/440 Having plural, diverse or diversely controlled sources 80
318/443 Periodic, repetitious or successive operations control of motor, including "jog" and "inch" control 308
318/445 Automatic and/or with time-delay means (e.g., automatic starting and/or stopping) 396
318/490 With signals, meters, recorders or testing devices 359
318/491 Control of both motor circuit and motor structure 36
318/492 Motor magnetic energy dissipation 25
318/493 Control of both armature (or primary) circuit and field (or secondary) circuit 58
318/494 Armature (or primary) circuit control 57
318/521 Field or secondary circuit control 16
318/538 Motor structure adjustment or control 58
318/543 Three-or-more-positions motor controller systems 9
318/558 Miscellaneous 109
318/560 Positional servo systems (e.g., servomechanisms) 907
318/689 Torquing motors 60
318/690 Self-synchronous type of motor 19
318/696 Open-loop stepping motor control systems 1,310
318/700 Synchronous motor systems 582
318/725 Repulsion motor systems 14
318/727 Induction motor systems 494
318/DIG.2 Windshield wiper controls 361

Patents under this class:

Patent Number Title Of Patent Date Issued
8692492 Lead angle value setting method, motor driving control circuit, and brushless motor Apr. 8, 2014
8674648 Single switch controlled switched reluctance machine Mar. 18, 2014
8664907 Fast switching for power inverter Mar. 4, 2014
8624541 System and method for controlling four-quadrant operation of a switched reluctance motor drive through a single controllable switch Jan. 7, 2014
8604726 Electronically commutated motor Dec. 10, 2013
8598822 Inverter device, motor driving device, refrigerating air conditioner, and power generation system Dec. 3, 2013
8587167 Brushless motor and electric device using same Nov. 19, 2013
8575871 Modular component electric machine Nov. 5, 2013
8525450 Power factor correction drive circuit topologies and control for switched reluctance machines Sep. 3, 2013
8519650 Method for determining the inductances of a permanent magnet synchronous machine Aug. 27, 2013
8508164 Vibration and noise control strategy in electrical machines Aug. 13, 2013
8508178 Torque based electronic pulse width modulation control system for a switched reluctance motor Aug. 13, 2013
8502488 Position sensorless motor control Aug. 6, 2013
8502485 Motor drive circuitry Aug. 6, 2013
8493018 Fast switching for power inverter Jul. 23, 2013
8476852 Controller for a brushless motor Jul. 2, 2013
8471509 Management of disk drive during power loss Jun. 25, 2013
8441223 Torque control method for high-speed switched reluctance motor May. 14, 2013
8436572 Switched reluctance machine May. 7, 2013
8432118 Inverter and a method for controlling an electric machine Apr. 30, 2013
8427095 Actuation system with step motor Apr. 23, 2013
8421396 Motor controlling device Apr. 16, 2013
8405327 Passive converter for drive device of switched reluctance motor Mar. 26, 2013
8405365 Output voltage control apparatus of generator Mar. 26, 2013
8378617 Method of controlling current of high-speed switched reluctance motor Feb. 19, 2013
8319456 Method, controller, and power converter for controlling a single-switch based switched reluctance machine Nov. 27, 2012
8314586 System for adapting the resonant operation of a personal care appliance during the lifetime thereof Nov. 20, 2012
8314580 Brushless DC-motor Nov. 20, 2012
8314577 Energy converter and electromechanical apparatus Nov. 20, 2012
8310196 Method and apparatus for failsafe monitoring an electromotive drive Nov. 13, 2012
8305020 Electric power conversion device, compressor motor with the device, and air conditioner with the motor Nov. 6, 2012
8294396 Compact FPGA-based digital motor controller Oct. 23, 2012
8258734 Energy converter and electromechanical apparatus Sep. 4, 2012
8222843 Method for determining the angular position of the rotor of a mechanically commutated d.c. servo motor Jul. 17, 2012
8212509 Positional recognition using BEMF zero crossover recognition of a rotor of an electronically commutated electric machine with two coil sections of different inductances Jul. 3, 2012
8203302 System and method for controlling four-quadrant operation of a switched reluctance motor drive through a single controllable switch Jun. 19, 2012
8179079 Rotation angle detection device and electric power steering apparatus employing the same May. 15, 2012
8143835 Method of driving DC/DC converter, method of controlling DC/DC converter apparatus, method of controlling driving operation of vehicle, and method of driving fuel cell system Mar. 27, 2012
8144416 Hard disk driving circuit and method of driving spindle motor Mar. 27, 2012
8138701 Method for determining the position of a rotor of an electric motor without sensors Mar. 20, 2012
8120215 Motor and control unit thereof Feb. 21, 2012
8076875 Switched reluctance motor and connection method for sensor shutter thereof Dec. 13, 2011
8067913 Power tool Nov. 29, 2011
8058826 Motor controller with hall sensor output misalignment compensation using delayed or shifted commutation Nov. 15, 2011
8054022 Reduced acoustic noise during spin-up by driving a spindle motor open loop using sinusoidal signals Nov. 8, 2011
8018188 Method and device for determining the position of a rotor of a brushless and sensorless electric motor Sep. 13, 2011
7969108 Control circuit for a brushless DC motor and method therefor Jun. 28, 2011
7956561 Rotor position sensing system of brushless motor Jun. 7, 2011
7948194 Waveform current monitor using RDSon of low-side bridge FET May. 24, 2011
7932688 Cleaner and method for driving the same Apr. 26, 2011

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