| Patents for H02P 13 - Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output (981) |
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| 04/29/1993 | DE4135059A1 Continuous voltage controller with magnetically decoupled single transformers - employs thyristors in controlled inverter between additional windings of main transformer and sections of additional transformer |
| 02/09/1993 | WO1993003430A1 Phase-shifting transformer system |
| 02/09/1993 | CA2092084A1 Phase-shifting transformer system |
| 01/28/1993 | DE4124864A1 Current supply for alternating voltage fluctuation control - has transformer with tappings for different input voltages which are selected across logic circuit and connected using switches |
| 12/16/1992 | CN2125211U Transformer with automatic volume regulator |
| 11/24/1992 | US5166597 Phase-shifting transformer system |
| 11/04/1992 | CN1065960A Inductive current switching system and method |
| 10/20/1992 | CA2061330A1 Inductive current switching system and method |
| 10/13/1992 | US5155672 Switched multi-tapped transformer power conversion method and apparatus |
| 09/17/1992 | DE4109510A1 Revolution speed controller for fan or centrifugal pump motor - uses control logic actuating semiconductor or mechanical switches for transformer tap-offs |
| 08/05/1992 | CN1063381A Voltag or reactive power control method and control device therefor |
| 08/04/1992 | US5136233 Means and method for controlling elecrical transformer voltage regulating tapchangers |
| 07/22/1992 | EP0495590A2 Voltage or reactive power control method and control device therefor |
| 05/29/1992 | WO1992009024A1 Voltage regulator |
| 03/03/1992 | CA1296768C Regulating transformer system |
| 02/10/1992 | CA2044664A1 Switched multi-taped transformer power conversion method and apparatus |
| 12/05/1991 | DE4102354C1 Automatically controlling three winding control transformer - supplying regulator for stepped switch with stipulated voltages of two windings and actual valve of one |
| 08/08/1991 | WO1991011819A1 Driver circuit for inductive elements such as crt deflection coils |
| 04/09/1991 | US5006784 Thyristor on-load change-over switch |
| 01/23/1991 | EP0409431A2 Conductivity state monitor for thyristor transformer tap switching devices |
| 01/10/1991 | CA2015483A1 Conductivity state monitor for thyristor transformer tap switching devices |
| 12/25/1990 | US4980616 Driver circuit for inductive elements such as CRT deflection coils |
| 11/10/1990 | CA2015317A1 Frequency-independent single-phase to three-phase ac power conversion |
| 10/17/1990 | CN2064132U Three-phase load automatic voltage regulator |
| 09/19/1990 | CN2062524U Automatic adjusting no-load loss electricity distribution transformer |
| 03/07/1990 | CN2054235U Large power electric source equipment for medium-sized railway station |
| 01/23/1990 | US4896091 Electric power converter |
| 12/12/1989 | US4887201 Self-oscillating inverter with adjustable frequency |
| 10/04/1989 | CN1036109A Master circuit of the a.c. voltage regulator |
| 08/23/1989 | CN2043414U Following type a.c power source automatic voltage regulator |
| 05/10/1989 | CN2037511U Micro electric brain control device with voltage regulator |
| 03/22/1989 | CN2034754U Multifunctional automatic protector for voltage-stabilizing |
| 03/08/1989 | CN2033955U Reactive voltage synthetical controlling and recording device with micro-computer |
| 02/08/1989 | CN2032377U 节能交流稳压器 Energy-exchange regulator |
| 12/29/1988 | WO1988010502A1 Thyristor on-load change-over switch |
| 11/16/1988 | CN88202344U Current and voltage converter |
| 10/19/1988 | CN88200403U 三相无级调压器 Three-phase stepless regulator |
| 08/31/1988 | CN87213402U Full-automatic time delay/voltage stabilizing protector |
| 06/15/1988 | CN86108115A Automatic ac voltage regulator with switch voltage compensation |
| 04/06/1988 | CN87214090U Variable reactance voltage-regulated tension controller |
| 03/22/1988 | US4733158 Control circuit for tap-switching power supplies and multi-tap transformers |
| 02/17/1988 | CN87205743U Protective device for domestic electrical equipment |
| 12/15/1987 | US4713619 Electronic device for feeding ion pump |
| 10/27/1987 | CA1228644A2 Circuit to inhibit false low voltage alarms |
| 10/21/1987 | CN87200779U Shaded pole transfomer type invertor |
| 09/30/1987 | EP0238516A1 Electric power converter |
| 07/08/1987 | CN86203046U Automatic safe a.c. voltage regulator with time delay controller |
| 06/11/1987 | DE3543299A1 Device for demagnetising the transformer of a flow transducer and a method for its operation |
| 04/14/1987 | US4658346 Apparatus for co-generation of electric power |
| 03/26/1987 | WO1987001834A1 Electric power converter |
| 10/28/1986 | US4620108 Means providing independently controlled superimposed AC and DC voltages |
| 09/17/1986 | CN85205567U Train contravariant main power being able to lower voltage |
| 08/26/1986 | US4608627 Non-dissipative current distribution circuit for magnetohydrodynamic generator electrodes |
| 07/15/1986 | US4600877 Arrangement in transformers |
| 06/25/1986 | CN85201324U Adjustable a.c. constac |
| 06/04/1986 | EP0183307A2 Electronic device for feeding an ion pump with two different tensions and for improved measuring of the pressure in said pump |
| 02/18/1986 | US4571499 Circuit arrangement for switchover of load between different sources of alternating voltage |
| 10/29/1985 | US4550285 Load-switching circuit for antiparallel thyristor networks and a tapped transformer |
| 05/08/1985 | EP0140851A1 Magnetization arrangement for transformers |
| 11/28/1984 | EP0008296B1 Supplier of direct current with superimposed alternating current |
| 12/06/1983 | US4419618 On-board vehicular network method for efficient generator utilization |
| 11/22/1983 | CA1157517A1 Current limiter for switched dc-to-dc converter |
| 10/11/1983 | CA1155175A1 Transformer for the controllable shifting of the phase angle of output voltages in relation to the phase angles of input voltages |
| 07/05/1983 | CA1149456A1 Frequency multiplication |
| 10/26/1982 | US4356525 Method and circuit for controlling a hybrid contactor |
| 08/10/1982 | CA1129497A1 Three phase power control unit |
| 06/22/1982 | US4336488 Transformer for the controllable shifting of the phase angle of output voltages in relation to the phase angles of input voltages |
| 02/04/1981 | EP0023366A1 Transformer for the controlled shifting of the phase angles of output voltages with respect to the phase angles of input voltages |
| 08/26/1980 | US4219759 Three phase power control unit |
| 08/05/1980 | CA1083217A1 Balanced a-c control circuit |
| 02/20/1980 | EP0008296A1 Supplier of direct current with superimposed alternating current. |
| 10/09/1979 | US4170739 Apparatus and method for supplying direct current with superimposed alternating current |
| 08/28/1979 | CA1061406A1 Frequency converter, commutation short circuit protection |
| 07/12/1979 | WO1979000428A1 Supplier of direct current with superimposed alternating current |
| 04/03/1979 | US4147972 Control circuit for an a-c control element |
| 02/28/1978 | US4077001 Electromagnetic convertor with stationary variable-reluctance members |
| 01/03/1978 | US4066954 Frequency converter |
| 12/06/1977 | US4061958 Constant power rating power supply |
| 06/28/1977 | US4032833 Chopper control device |
| 05/10/1977 | US4023090 Zagreb electrical circuit |
| 10/12/1976 | US3986100 DC-voltage supply means for an inverter |