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Class Information
Number: 318/254
Name: Electricity: motive power systems > Self-commutated impulse or reluctance motors
Description: Subject matter in which a rotary electric motor, of the type in which the rotary element tends to assume a predetermined angular position when the motor is continuously energized, is provided with a commutator or circuit making and breaking means which is actuated by the motor to determine the instants of time at which the field producing winding or windings thereof are energized and de-energized relative to the angular position of the rotary element of the motor.










Patents under this class:

Patent Number Title Of Patent Date Issued
7288922 Control apparatus for automotive alternator having capability to accurately detect temperature of alternator Oct. 30, 2007
7288911 System and method for commutating a motor Oct. 30, 2007
7288910 Sensorless control in a permanent magnet machine Oct. 30, 2007
7288906 Manually operated brushless direct current motor Oct. 30, 2007
7288905 Integrated circuit and method for trainable control and operation of DC motor Oct. 30, 2007
7285931 Brushless motor commutation and control Oct. 23, 2007
7285930 Method and device for controlling a multiphase electronically commutated motor Oct. 23, 2007
7285929 Brushless motor commutation and control Oct. 23, 2007
7282888 AC fan motor driving circuit having detecting current wave capability Oct. 16, 2007
7282878 Systems for brushless DC electrical drive control Oct. 16, 2007
7282877 DC brush motor rotation amount detection method and apparatus Oct. 16, 2007
7282876 System for driving brushless DC motor and method of driving same Oct. 16, 2007
7282875 System and method for electric motor control Oct. 16, 2007
7279864 Control unit for driving a regulating transistor of a fan arrangement Oct. 9, 2007
7279863 Method and apparatus for detecting excitation position of SRM by comparison of detected current Oct. 9, 2007
7279860 System and method for evaluating back electromotive force in a motor Oct. 9, 2007
7279859 EC motor and method for operating same Oct. 9, 2007
7279857 System, method, and computer-readable medium for reduction of commutation-related acoustic noise in a fan system Oct. 9, 2007
7276867 Controller arrangement with adaptive non-overlapping commutation Oct. 2, 2007
7274163 Methods and apparatus for commutating a brushless DC motor in a laser printer Sep. 25, 2007
7274162 Motor spindle control system and method Sep. 25, 2007
7274161 Motor driving apparatus Sep. 25, 2007
7272303 Method and control circuit for driving an electric motor of a seatbelt retractor Sep. 18, 2007
7271564 Method, apparatus, and system for drive control, power conversion, and start-up control in an SRM or PMBDCM drive system Sep. 18, 2007
7271559 Method and switching apparatus for recording the current in an electrical device Sep. 18, 2007
7271557 AC motor driving apparatus and method of controlling the same Sep. 18, 2007
7271556 Method and apparatus for estimating rotor position of switched reluctance motor, and method and apparatus for sensorless control of switched reluctance motor Sep. 18, 2007
7268505 Electric machine and method of operating the electric machine Sep. 11, 2007
7268503 Vibration linear actuating device, method of driving the same device, and portable information apparatus using the same device Sep. 11, 2007
7268502 Method and arrangement for controlling the synchronous running of a plurality of electronically commutated motors Sep. 11, 2007
7268441 Control device for motor generator Sep. 11, 2007
7265538 Method and device for measuring the rotational speed of a pulse-activated electric motor based on a frequency of current ripples Sep. 4, 2007
7265514 Frequency-variable pulse-width-modulation motor drive circuit capable of operating under different PWM frequencies Sep. 4, 2007
7265507 Angular position and velocity estimation for synchronous machines based on extended rotor flux Sep. 4, 2007
7265505 Control apparatus for selectively driving plural stator windings of synchronous motor Sep. 4, 2007
7262578 Direct control of an induction motor Aug. 28, 2007
7262576 Method for driving a synchronous electric motor in particular for fans Aug. 28, 2007
7262570 Motor controller with enhanced noise immunity unbuffered hall sensors Aug. 28, 2007
7262569 Electronic rotor pointing with high angular resolution Aug. 28, 2007
7262568 Brushless DC motor coupled directly to AC source and electric apparatus using the same motor Aug. 28, 2007
7262140 Method of smoothing waveguide structures Aug. 28, 2007
7260319 Abnormality monitoring device for motor control system Aug. 21, 2007
7259531 Speed control of brushless DC motors Aug. 21, 2007
7256564 System and method for attenuating noise associated with a back electromotive force signal in a motor Aug. 14, 2007
7256561 Method for operating a rotating electrical machine Aug. 14, 2007
7256560 Circuit arrangement for supplying a control electronics system in electric machines Aug. 14, 2007
7256558 Brushless motor and disk drive device using the same Aug. 14, 2007
7253581 Data storage device, motor control device, and motor control method Aug. 7, 2007
7253574 Effective switching frequency multiplier inverter Aug. 7, 2007
7251111 Method of controlling seatbelt retracting device with motor Jul. 31, 2007











 
 
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