| Patents for H02P 27 - Arrangements or methods for the control of ac-motors characterised by the kind of supply voltage (13,284) |
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| 04/21/1981 | US4263535 Motor drive system for an electric mining shovel |
| 04/16/1981 | WO1981001084A1 Circuit arrangement for an asynchronous motor drive of controlled stepping |
| 04/07/1981 | US4259845 Logic control system for inverter-driven motor |
| 04/07/1981 | CA1098739A1 Gyro motor control |
| 03/31/1981 | US4259629 Control devices of induction motors |
| 03/31/1981 | US4259620 Low cost, variable speed, constant torque induction motor drive |
| 03/31/1981 | CA1098604A1 Tachogenerator processing circuits and motor speed control systems including such circuits |
| 03/24/1981 | US4258303 Energy controller for conversion from a direct current source to a variable frequency load |
| 03/18/1981 | EP0025333A1 Motor speed control system and a food mixer incorporating such system |
| 03/05/1981 | WO1981000651A1 Variable speed electric machine having controlled magnetic flux density |
| 02/24/1981 | US4253053 Reluctance electric motor drive systems |
| 02/17/1981 | US4251763 Commutating capacitor charge detection circuit and method |
| 02/17/1981 | US4251757 Power control system and apparatus thereof |
| 02/17/1981 | CA1096043A1 Motor control system |
| 02/03/1981 | US4249120 Variable speed induction motor control system |
| 02/03/1981 | CA1094836A1 Heat pumps |
| 01/28/1981 | EP0023116A1 PWM inverter device |
| 01/21/1981 | EP0022663A1 PWM inverter device |
| 01/14/1981 | EP0022267A1 Control system for induction motor-driven car |
| 01/06/1981 | US4243926 Load responsive voltage controlled motor |
| 12/30/1980 | CA1092645A1 Energy economizer for induction motors |
| 12/16/1980 | US4240020 Control system for suppressing torque ripple in synchronous motor |
| 11/26/1980 | EP0019138A1 Load-control device for an asynchronous machine fed by a converter |
| 11/25/1980 | US4236201 Inverter device |
| 11/12/1980 | EP0018385A1 Variable reluctance motor systems |
| 11/11/1980 | US4233551 Control circuit for an A.C. motor |
| 10/28/1980 | US4230979 Controlled current inverter and motor control system |
| 10/15/1980 | EP0017403A1 A method of, and apparatus for, operating an induction motor |
| 10/15/1980 | EP0017345A1 Slip frequency control for variable speed induction motors |
| 10/15/1980 | EP0016778A1 Variable reluctance motor systems |
| 10/14/1980 | US4228383 Speed control circuit arrangement for an AC commutator motor |
| 10/07/1980 | US4227139 Motor control arrangement |
| 10/07/1980 | US4227138 Reversible variable frequency oscillator for smooth reversing of AC motor drives |
| 09/18/1980 | WO1980001974A1 Electric drive with asynchronous motor |
| 09/16/1980 | CA1085911A1 Electric motor having controlled magnetic flux density |
| 09/02/1980 | CA1084986A1 Method of and system for operating an induction motor |
| 08/26/1980 | CA1084582A1 Adjustable speed a-c motor drive with smooth transition between operational modes and with reduced harmonic distortion |
| 08/19/1980 | US4218646 AC Feeding apparatus and rotating field apparatus having AC feeding apparatus |
| 08/12/1980 | CA1083663A1 Means for stabilizing an a-c electric motor drive system |
| 07/29/1980 | CA1082765A1 Plural multiphase motor drive circuit |
| 07/23/1980 | EP0013615A1 Apparatus for controlling a.c. motor |
| 07/22/1980 | US4214196 Energy controller for conversion from a direct current source to a variable frequency load |
| 07/22/1980 | US4213517 Elevator control system |
| 07/15/1980 | US4213161 Motor control for slow speed tape recorder |
| 07/09/1980 | EP0013225A1 Apparatus for controlling the reciprocating displacement of mobile equipment such as an electrostatic sprayer carriage, by means of an asynchronous motor with squirrel cage rotor |
| 07/09/1980 | EP0013171A1 Induction motor drive apparatus |
| 07/08/1980 | US4211967 Motor speed adjusting apparatus |
| 06/24/1980 | CA1080362A1 Synthesizer for multiphase waveforms |
| 06/10/1980 | US4207510 Control method and means for efficient operation of brushless d-c motors over a wide range of operating conditions |
| 06/10/1980 | US4207509 Converter motor |
| 06/10/1980 | CA1079349A1 Protection arrangement for a brushless synchronous machine |
| 05/20/1980 | CA1078016A1 Induction motor load monitor and control apparatus |
| 05/14/1980 | EP0010981A1 Induction motor drive apparatus |
| 05/14/1980 | EP0010980A1 Overcurrent protection circuitry for an electric motor driving circuit |
| 05/14/1980 | EP0010979A1 AC electric motor driving circuit having overload protection circuitry |
| 04/16/1980 | EP0009783A1 A system for driving a motor by a pulse width modulation inverter |
| 04/08/1980 | CA1075307A1 Power factor control system for ac induction motors |
| 02/26/1980 | US4190793 Energy economizer for induction motors |
| 02/19/1980 | US4189669 Circuit arrangement for generating a pulse-width modulated signal |
| 02/06/1980 | EP0007552A1 Circuit for forming a voltage signal which is proportional to a magnetic flux component within a rotating field machine |
| 02/06/1980 | EP0007550A1 Alternating voltage integrator for producing a voltage signal which is proportional to one flux component in a rotating-field machine; the use of two of such alternating voltage integrators in connection with a rotating-field machine drive, and a method of operating such a drive |
| 01/29/1980 | US4186435 Device for controlling a Graetz rectifier bridge |
| 01/29/1980 | US4186334 Control systems of alternating current motors |
| 01/15/1980 | US4184198 Three-phase voltage generator responsive to DC control pulses |
| 01/01/1980 | US4181877 Inertia compensated static motor drive |
| 01/01/1980 | US4181197 AC elevator speed control system |
| 12/27/1979 | WO1979001133A1 Variable reluctance motor systems |
| 12/27/1979 | WO1979001132A1 Variable reluctance motor systems |
| 11/27/1979 | US4176307 Energy economizing AC power control system |
| 10/16/1979 | CA1064574A1 Apparatus for synchronising ac-motors |
| 10/09/1979 | CA1064175A1 Elevator control apparatus |
| 09/25/1979 | CA1063165A1 Torque regulating induction motor control system |
| 09/06/1979 | WO1979000619A1 Speed control device for asynchronous motors |
| 07/24/1979 | US4162437 Motor acceleration and starting torque control |
| 07/17/1979 | CA1058695A1 Regulating the torque of an induction motor |
| 07/10/1979 | US4160940 Method of and system for operating an induction motor |
| 07/10/1979 | US4160938 Motor drive apparatus |
| 06/26/1979 | US4159513 Static controlled AC motor drive having plug reversal capability |
| 06/19/1979 | US4158801 Control system of alternating current motors |
| 06/12/1979 | US4158163 Inverter circuit |
| 05/29/1979 | US4156899 Current source inverter |
| 05/22/1979 | CA1055115A1 Alternating current control circuits |
| 04/24/1979 | CA1053331A1 Control system for controlling the operation of a three-phase load |
| 04/24/1979 | CA1053321A1 Apparatus for regulating magnetic flux in an ac motor |
| 04/10/1979 | CA1052279A1 Switching circuit utilizing the base storage characteristic of a transistor for use in a facsimile transceiver and the like |
| 04/03/1979 | CA1051977A1 Modulated induction generator |
| 03/20/1979 | US4145647 Arrangement for controlling the speed and rotary direction of a three-phase asynchronous motor |
| 03/20/1979 | US4145161 Speed control |
| 03/06/1979 | US4143311 Hysteresis synchronous motor rate servo system |
| 02/27/1979 | US4141244 Load indicating metering devices for motor driven loads |
| 02/21/1979 | EP0000709A1 Measurement of pulsating torque in a current source inverter motor drive and method |
| 02/07/1979 | EP0000530A1 Feedback control for reduction of cogging torque in controlled current AC motor drives and method |
| 02/06/1979 | CA1048104A1 Drive circuit for induction motor used in air conditioning system of a railway vehicle |
| 01/30/1979 | US4137489 Feedback control for reduction of cogging torque in controlled current AC motor drives |
| 01/02/1979 | US4132931 Control system for a.c. motors |
| 12/19/1978 | US4130838 Speed control apparatus for scanning system |
| 12/19/1978 | CA1044758A1 Three phase load controlling system |
| 12/12/1978 | US4129808 Electronic control arrangement which can be used in particular for driving a brushless and slip-ringless motor and an installation incorporating such an arrangement |
| 12/05/1978 | US4128793 Power circuit for variable frequency, variable magnitude power conditioning system |
| 10/31/1978 | US4123692 Adjustable speed electric motor drive having constant harmonic content |