| Patents for H02P 21 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation (7,114) |
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| 04/17/1990 | US4918367 Method for controlling the torque of an ac motor |
| 04/10/1990 | US4916376 Inverter driving method for induction motors |
| 04/10/1990 | US4916368 Controlling method and device for permanent magnet synchronous motor |
| 04/04/1990 | EP0361833A2 Load commutated invertor (LCI) induction motor drive |
| 03/08/1990 | WO1990002442A1 Current limiting system for a voltage-type inverter |
| 03/06/1990 | US4906912 Apparatus for controlling the load angle of a converter |
| 02/27/1990 | US4904920 Method and device for operating an induction machine |
| 01/24/1990 | EP0351783A2 PWM inverter apparatus |
| 01/17/1990 | CN1006513B Lift control apparatus |
| 01/10/1990 | EP0349568A1 Improved control method of an ac induction motor and device therefor |
| 01/03/1990 | CN1006351B Vector control apparatus for induction motor |
| 12/05/1989 | US4885520 Induction motor controller |
| 12/05/1989 | US4885519 Method and apparatus for determining the flux vector of a rotating-field machine |
| 12/05/1989 | US4885518 Induction motor torque/flux control system |
| 11/28/1989 | US4884023 Method and apparatus for determining the rotor resistance of a rotating-field machine |
| 10/05/1989 | WO1989009512A1 Method of calculating magnetic flux of an induction motor |
| 10/04/1989 | EP0335269A1 Magnetic flux operation method for induction motor |
| 10/04/1989 | EP0335180A1 Load angle control device for a power converter |
| 09/26/1989 | US4870338 Load commutated inverter (LCI) induction motor drive |
| 09/20/1989 | EP0333054A1 Control system for controlling revolution speed of electric motor |
| 08/30/1989 | EP0330188A1 Induction motor vector control |
| 08/29/1989 | US4862343 Induction motor control apparatus |
| 08/29/1989 | US4862054 Tacho-less vector control adaptive system for motor drive |
| 08/08/1989 | US4855661 Motion control apparatus for induction motor |
| 08/02/1989 | EP0325982A1 Forming method for the actual value of the load angle of a field-orientated controlled induction machine, and control thereof |
| 07/19/1989 | EP0324146A1 Method and apparatus for the determination of the armature resistance of an induction machine |
| 07/04/1989 | US4845418 Flux profile control for startup of an induction motor |
| 05/31/1989 | EP0317870A1 Method and device for calculating a differential function |
| 05/31/1989 | EP0317869A1 Method of simulating the actual value of a load angle of an induction machine, and circuit arrangement for carrying out this method |
| 05/23/1989 | US4833388 Method of and arrangement for controlling an asynchronous motor |
| 05/03/1989 | EP0313671A1 Temperature compensative revolution speed control for an induction motor. |
| 04/25/1989 | US4825132 Current mode motor control |
| 04/19/1989 | CN1032473A Arrangement for controlling induction motor |
| 04/18/1989 | US4823066 Three-phase induction motor control method |
| 04/05/1989 | EP0310050A2 Control apparatus for induction machine |
| 04/04/1989 | US4818927 Acceleration/deceleration control apparatus using slip speed |
| 03/29/1989 | EP0308974A2 Induction motor control system |
| 03/21/1989 | US4814683 Induction motor control apparatus |
| 03/15/1989 | EP0306922A2 Control system for controlling revolution speed of electric motor |
| 02/28/1989 | US4808903 Vector control system for induction motors |
| 01/24/1989 | US4800327 Three-phase induction motor control method |
| 01/11/1989 | EP0298290A1 Method and device for running an induction machine |
| 12/28/1988 | EP0296840A2 Method and apparatus for induction motor drive |
| 12/22/1988 | DE3820125A1 Method for controlling an electric motor |
| 12/20/1988 | US4792742 Control apparatus for an inverter with self-adjustment function of control constants |
| 12/20/1988 | US4792741 Control unit for non-circulating current type cycloconverter |
| 11/17/1988 | WO1988009087A1 Temperature compensative revolution speed control for an induction motor |
| 11/17/1988 | EP0290890A1 Method and apparatus to determine the field angle of an induction machine digitally |
| 11/02/1988 | EP0139006B1 System for controlling synchronous motor |
| 10/25/1988 | US4780658 Control system for induction motor |
| 10/25/1988 | US4780657 Vector control systems for multiphase a.c. machines |
| 10/19/1988 | CN85109746A Lift control apparatus |
| 10/11/1988 | US4777422 Induction motor flux estimator/controller |
| 09/22/1988 | WO1988007287A1 Improved control method of an ac induction motor and device therefor |
| 09/14/1988 | EP0281788A1 Method and circuit arrangement for the independent control of a current vector's components |
| 08/30/1988 | US4767976 Control system for PWM inverter |
| 08/24/1988 | EP0279415A1 Induction motor control apparatus |
| 08/16/1988 | US4764712 Method and apparatus for operating a field-oriented rotating-field machine supplied by a controlled converter |
| 08/09/1988 | US4763059 Method and apparatus for induction motor drive |
| 08/09/1988 | US4763058 Method and apparatus for determining the flux angle of rotating field machine or for position-oriented operation of the machine |
| 08/09/1988 | US4763057 Control for improving induction transient response by excitation angle control |
| 07/20/1988 | EP0274716A1 Method and device to determine the flux vector of an induction machine |
| 07/12/1988 | US4757248 Induction motor torque control system |
| 06/21/1988 | US4752725 Control apparatus for three-phase induction motor |
| 06/14/1988 | US4751447 AC motor speed control apparatus |
| 06/08/1988 | EP0142563B1 System of controlling synchronous motor |
| 05/24/1988 | US4745991 Speed control apparatus for A.C. elevator |
| 03/29/1988 | US4734633 Speed control apparatus for a synchronous motor |
| 03/02/1988 | EP0257628A2 Flux profile control for startup of an induction motor |
| 03/02/1988 | EP0257396A1 Process and device for the operation of a field-orientated rotating-field machine fed by a controlled converter |
| 02/09/1988 | US4724373 Method and apparatus for flux and torque sensing in electrical machines |
| 02/03/1988 | CN87105236A Induction motor control apparatus |
| 01/27/1988 | EP0254310A2 Induction motor control apparatus |
| 01/12/1988 | CA1231378A1 Method and apparatus for stabilizing the locus of a vector formed by intergration |
| 01/07/1988 | DE3622096A1 Method for controlling and regulating an asynchronous machine which is operated from an invertor |
| 12/15/1987 | US4713596 Induction motor drive system |
| 11/25/1987 | CN87103875A Vector control apparatus for induction motor |
| 11/17/1987 | US4707651 Voltage-controlled field-oriented induction motor control system |
| 11/10/1987 | US4706012 Frequency compensated regulator |
| 11/04/1987 | EP0243960A1 Vector control apparatus for induction motor |
| 10/21/1987 | EP0241920A2 Control system for PWM inverter |
| 10/21/1987 | EP0241867A1 Acceleration/deceleration control apparatus using slip speed |
| 10/21/1987 | EP0241853A2 Apparatus for detecting abnormality of primary current for vector control |
| 10/21/1987 | CN87103189A Control arrangement for turning induction motor |
| 10/21/1987 | CN87102809A Device for detecting abnormal phenomenon of primary current in vector control |
| 10/20/1987 | US4701839 Sampled data servo control system with field orientation |
| 10/15/1987 | DE3612273A1 Method for controlling and regulating a synchronous machine |
| 10/14/1987 | EP0241045A1 Motion control apparatus for induction motor |
| 10/06/1987 | US4698577 Method of digital flux reconstruction with DC elimination |
| 09/02/1987 | EP0233948A1 Method of controlling a three-phase induction motor |
| 09/01/1987 | CA1226331A1 Method and apparatus for determining the flux vector of a rotating-field machine |
| 08/25/1987 | US4689732 Method and apparatus to operate an intermediate circuit converter with current rise limitation |
| 08/06/1987 | DE3603051A1 Method for controlling and regulating a synchronous machine |
| 07/15/1987 | EP0228535A1 Method and device to determine the flux angle of an induction machine i.e. to operate the machine according to position |
| 07/14/1987 | US4680695 Cross coupled current regulator |
| 07/14/1987 | US4680526 Method of controlling inverter-driven induction motor |
| 07/14/1987 | US4680525 Induction motor driving system |
| 07/07/1987 | US4678248 Direct self-control of the flux and rotary moment of a rotary-field machine |
| 06/30/1987 | US4677361 Apparatus for operating an elevator |
| 06/30/1987 | US4677360 Field weakening induction drive |