Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02P - Control or regulation of electric motors, generators, or dynamo-electric converters; Controlling transformers or reactors or choke coils › H02P 23 - Arrangements or methods for the control of ac-motors characterised by a control method other than vector control
Patents for H02P 23 - Arrangements or methods for the control of ac-motors characterised by a control method other than vector control (5,487)
10/1980
10/15/1980EP0017345A1 Slip frequency control for variable speed induction motors
10/07/1980US4227139 Motor control arrangement
10/07/1980US4227137 Digital tach and slip signal motor control
09/1980
09/30/1980US4225812 Electric motor control system
09/23/1980US4224515 High accuracy optical shaft encoder system
09/16/1980CA1085912A1 System for controlling rotations of a dc motor
09/09/1980US4221996 Hoisting apparatus
08/1980
08/19/1980US4218735 Digital motor control system
08/05/1980US4216514 Protective device for brushless exciting device
08/05/1980US4216419 Tachometer system
08/05/1980US4216418 Speed regulation of D.C. motor using counter
07/1980
07/29/1980US4215304 Motor/brake transitioning for an inverter driven a-c induction motor
07/29/1980US4215298 Servomechanism rate control system with compensation for motor-tachometer resonance
07/23/1980EP0013615A1 Apparatus for controlling a.c. motor
07/15/1980US4213077 Speed control circuit for a universal electric motor
07/08/1980US4212039 VTR Tape drive system
07/08/1980US4211967 Motor speed adjusting apparatus
07/08/1980US4211964 Speed control circuit
06/1980
06/10/1980US4207510 Control method and means for efficient operation of brushless d-c motors over a wide range of operating conditions
06/10/1980US4207506 Servo system with reduction of transient error and settling time
06/03/1980US4206485 Digital phase servo system
06/03/1980CA1078918A1 Stepping motor closed loop constant velocity control system
05/1980
05/27/1980US4205260 Motor control system
05/27/1980CA1078453A1 Hgh stability digital head servo for video recorders
05/06/1980US4201936 Motor speed regulator and control system
04/1980
04/29/1980US4200825 Digital control device for thyristol-pulse d.c. regulators
04/16/1980EP0010026A1 Revolving machine unit having speed independent dynamic characteristics equiped with speed regulating means
04/15/1980CA1075754A1 Special motor windings for the suppression of a specific harmonic by expanding the electrical angle of phase belts
04/08/1980US4197489 Spindle drive system
04/08/1980CA1075307A1 Power factor control system for ac induction motors
04/02/1980EP0009443A1 Digital comparator of the angular speed and motor control comprising such a device
03/1980
03/18/1980US4194144 Constant velocity driving means
03/11/1980US4193020 Phase lock control system with trajectory correction
03/04/1980CA1073049A1 Main field current transient control circuit for dynamoelectric machines
02/1980
02/26/1980US4190793 Energy economizer for induction motors
01/1980
01/29/1980US4186334 Control systems of alternating current motors
12/1979
12/27/1979WO1979001132A1 Variable reluctance motor systems
12/25/1979CA1068776A Motor speed control apparatus using pulse widths
12/18/1979CA1068330A1 Control and protection of brushless synchronous motors
12/04/1979US4177411 Speed-and-phase control circuit for a rotary machine
12/04/1979CA1067567A1 Stepper motor valve actuator control apparatus
11/1979
11/27/1979USRE30161 Apparatus measuring relative velocity of movable members including means to detect velocity from the position encoder
11/27/1979US4176307 Energy economizing AC power control system
11/06/1979CA1065963A1 D.c. motor starter with speed discrimination
10/1979
10/23/1979CA1065017A1 Digital-analog frequency error signaling
10/16/1979CA1064577A1 Positioning control means for motor driven rotary tap changer
10/16/1979CA1064574A1 Apparatus for synchronising ac-motors
10/02/1979US4169991 Variable print speed control
10/02/1979CA1063727A1 Turntable speed control system
09/1979
09/18/1979US4168457 Self adaptive speed control system
09/11/1979US4167096 Combined cycle electric power plant and a gas turbine having an improved overspeed protection system
09/11/1979CA1062383A1 Direct current braking means for wound rotor motor
08/1979
08/07/1979USRE30068 Pulsating torque apparatus and method
07/1979
07/24/1979US4162437 Motor acceleration and starting torque control
07/03/1979US4160196 Two-phase ac electric motor control circuit
06/1979
06/26/1979US4159513 Static controlled AC motor drive having plug reversal capability
06/26/1979CA1057352A1 Brushless phase locked servo drive
06/19/1979US4158788 Special motor windings for the suppression of a specific harmonic by expanding the electrical angle of phase belts
05/1979
05/22/1979US4156172 Main field current transient control circuit for dynamoelectric machines
05/22/1979US4156169 Servo control apparatus
05/15/1979US4155033 Synchronous capstan drive system
05/01/1979US4152631 Process time control system
05/01/1979US4152630 Multi-phase motor
04/1979
04/24/1979US4150634 Integrated motor controller for sewing machines
04/10/1979US4149117 Circuit and method for servo speed control
04/03/1979US4147967 Apparatus and method for controlling the velocity of a moveable member
04/03/1979US4147966 Means for digital control
03/1979
03/27/1979US4146922 Constant velocity driving means
03/27/1979US4146910 Combined speed control and sectoring index for disc recorders and the like
03/27/1979US4146270 Control device for turbines with speed and load control
03/20/1979US4145647 Arrangement for controlling the speed and rotary direction of a three-phase asynchronous motor
03/20/1979US4145645 Speed control means for squirrel-cage motor
03/06/1979US4143311 Hysteresis synchronous motor rate servo system
03/06/1979US4143309 Turbomolecular pump drive method and apparatus
03/06/1979CA1050102A1 Circuit arrangement for phase-alignment of a servo drive for a rotary system
02/1979
02/21/1979EP0000709A1 Measurement of pulsating torque in a current source inverter motor drive and method
02/20/1979US4140950 Control system for two-phase reversible motor
02/06/1979US4138723 Motor vehicle speed control system
01/1979
01/23/1979US4136347 Method for making a holographic tone wheel for use in a sync-off-tach tape drive system
01/16/1979US4135121 Variable-speed drive system with hydrostatic transmission and electric shunt motor
01/09/1979US4134049 Circuit for controlling slow speed of stacker elevator motor
12/1978
12/19/1978US4130785 Control assembly for a cyclically operating powered unit
12/19/1978CA1044785A1 Automatic control system using error signal and integral and derivative thereof
12/12/1978US4129053 Bulk product slicing system
12/05/1978US4128792 Control and protection of brushless synchronous motors
11/1978
11/28/1978US4127800 Means for adjustment of speed of prime mover
10/1978
10/17/1978CA1040765A1 Transportation system with decelerating control
10/10/1978US4119893 Circuit for forming an electrical quantity which is proportional to a flux component in a rotating field machine
09/1978
09/26/1978US4117384 Tachogenerator processing circuits and motor speed control systems including such circuits
09/12/1978CA1038471A1 Fail-safe transistorized overspeed circuit arrangement
09/05/1978US4112339 Measurement of pulsating torque in a current source inverter motor drive
08/1978
08/22/1978US4109190 Circuit for increasing the operating speed range of a velocity servo system
08/22/1978US4109184 Method and apparatus for providing a stable, high gain servo system
08/08/1978US4105935 Motor speed control apparatus
07/1978
07/25/1978US4103216 Stepping motor closed loop constant velocity control system
07/25/1978US4103214 Error cancelling sync-off-tach tape drive system
07/18/1978US4101013 Process for the control and regulation of the speed of a mobile
07/04/1978US4099107 Apparatus for synchronizing AC-motors
07/04/1978US4098367 Automotive vehicle speed control system
07/04/1978US4098242 Automatic control system with gain switching
1 ... 44 45 46 47 48 49 50 51 52 53 54 55