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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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