Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Electrical & Energy
Class Information
Number: 318/696
Name: Electricity: motive power systems > Open-loop stepping motor control systems
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; indexes in discrete angular increments of essentially uniform magnitude as a function of pulse inputs derived from outside the motor.










Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Next

Patent Number Title Of Patent Date Issued
4949022 Solid state DC fan motor Aug. 14, 1990
4949027 Arrangement for and method of operating an electric step motor Aug. 14, 1990
4947097 Automatic switching of motion control with tactile feedback Aug. 7, 1990
4933619 Stepping motor servo control system for a floppy disk drive Jun. 12, 1990
4933620 Control system for low speed switched reluctance motor Jun. 12, 1990
4933621 Current chopping strategy for switched reluctance machines Jun. 12, 1990
4929879 Microstepping of an unipolar stepping motor May. 29, 1990
4930094 Vehicle serial bus, mechanical instrument cluster odometer therefor May. 29, 1990
4928049 Circuit for controlling current switching in multiple inductive loads, with single current detector, particularly for windings of step motors May. 22, 1990
4928050 Recorder May. 22, 1990
4926077 Resistance compensation in a motor using a thermally variable resistive network May. 15, 1990
4926270 Driving method for a stepping motor and sheet conveying apparatus using the driving method May. 15, 1990
4924167 Rotor movement warning device for use in stepper motors May. 8, 1990
4918365 Electromechanical actuator having control and drive circuit Apr. 17, 1990
4914369 Disc drive with improved storage capacity Apr. 3, 1990
4912389 Rotary position detector for stepping motor Mar. 27, 1990
4912692 High rate, bidirectional drive for a bipole stepping motor watch Mar. 27, 1990
4910475 Pole grouping for stepping motor Mar. 20, 1990
4908562 Method and apparatus for controlling the magnitude and direction of a current through a winding Mar. 13, 1990
4906910 Drive circuit for a stepping motor control device Mar. 6, 1990
4904917 Drive apparatus Feb. 27, 1990
4901000 Variable rate stepper motor driver circuit and method Feb. 13, 1990
4899267 Spotlight and control system therefor Feb. 6, 1990
4897589 Apparatus for indexing an origin of a moving member Jan. 30, 1990
4897590 Track access apparatus in a magnetic recording/playback system Jan. 30, 1990
4896088 Fault-tolerant switched reluctance machine Jan. 23, 1990
4896089 Fault management system for a switched reluctance motor Jan. 23, 1990
4896105 AC electric energy meter having drive circuit including stepper motor for driving mechanical register Jan. 23, 1990
4890048 Low torque ripple stepping motor controller circuit Dec. 26, 1989
4890105 Step data processor for 180X and 90X compass synchro data Dec. 26, 1989
4888541 Method and apparatus for controlling stepmotor mechanical drives Dec. 19, 1989
4888542 Driving method of a stepping motor Dec. 19, 1989
4884016 Closed loop torque angle control of synchronous motor Nov. 28, 1989
4882530 Stepping motor control apparatus Nov. 21, 1989
4876618 Method for detecting zero track Oct. 24, 1989
4869610 Carriage control system for printer Sep. 26, 1989
4868477 Method and apparatus for controlling torque and torque ripple in a variable reluctance motor Sep. 19, 1989
4868478 Motor energizing circuit Sep. 19, 1989
4862051 Stepping motor's negative-phase braking control device Aug. 29, 1989
4859923 Microprocessor controlled dual channel closed loop controller for stepper motors used in servo systems Aug. 22, 1989
4857817 Drive circuit for stepping motor Aug. 15, 1989
4858103 Fluid valve control system for controlling fluid pressure or flow Aug. 15, 1989
4855660 Microstepping of an unipolar stepping motor Aug. 8, 1989
4851755 Low power stepper motor drive system and method Jul. 25, 1989
4851766 Fault diagnosis system for rotor winding of rotary electric machine Jul. 25, 1989
4847544 Microcomputer control of stepper motor using reduced number of parts Jul. 11, 1989
4845417 Driver for stepping motor Jul. 4, 1989
4843294 Solar array stepping to minimize array excitation Jun. 27, 1989
4841214 Control device for a stepping motor Jun. 20, 1989
4836387 Deflection gate driven by stepper motor Jun. 6, 1989

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Next










 
 
  Recently Added Patents
Bio-stimulant for improved plant growth and development
Targeted gene deletions for polysaccharide slime formers
Flexible pouch
Method and apparatus for optimizing transmission diversity
Techniques for determining optimized local repair paths
Apparatus and methods for providing efficient space-time structures for preambles, pilots and data for multi-input, multi-output communications systems
Device and method including a soldering process
  Randomly Featured Patents
Smear correction of CCD imager using active pixels
Method for transmitting data in a WLAN network
Lighted lure headpiece
Electrophotographic photoreceptor, image forming method using electrophotographic photoreceptor, image forming apparatus, and process cartridge for image forming apparatus
Optrode for sensing hydrocarbons
Acid catalyzed copolymerization of water and epoxy resin and uses thereof
Cassette system integrated apparatus
Method and circuit for calibrating data capture in a memory controller
Driving and locking mechanism for a threaded bearing cup
Electric lighting fixture