| Patents for H02M 5 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases (13,094) |
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| 01/17/1989 | US4799139 Voltage regulation for three-phase inverters |
| 01/12/1989 | DE3721591A1 Method for changing the transformation ratio of a transformer on the primary side, and a device for carrying out the method |
| 01/11/1989 | CN2030523U Dc welder with silicon controlled inverter for mines |
| 01/10/1989 | US4797799 Power converter |
| 01/10/1989 | US4797599 Power control circuit with phase controlled signal input |
| 01/04/1989 | CN1030166A Switch-capacitor method for ac transformation |
| 12/28/1988 | EP0296841A2 Cross tie for induction motor drive |
| 12/28/1988 | EP0296840A2 Method and apparatus for induction motor drive |
| 12/28/1988 | CN86207918U Plug type multifunctional voltage regulator for domestic electric device |
| 12/20/1988 | US4792741 Control unit for non-circulating current type cycloconverter |
| 12/15/1988 | WO1988009964A1 Switching ac voltage regulator |
| 12/13/1988 | US4791348 Switching ac voltage regulator |
| 12/13/1988 | US4791340 Induction motor drive arrangement |
| 12/13/1988 | CA1246671A1 Power take-off from transformer tap changer winding |
| 12/07/1988 | EP0293569A2 Power control circuit with phase controlled signal input |
| 12/07/1988 | CN88203656U Tv set daylight lamp power source voltage floating unit |
| 11/30/1988 | EP0292799A2 Circuit power regulator |
| 11/29/1988 | US4788635 Converter system combining a two-quadrant voltage-source rectifier and a four-quadrant voltage-source inverter, and a motor drive embodying the same |
| 11/29/1988 | US4788485 Apparatus for controlling electric motor |
| 11/29/1988 | US4788451 AC voltage stabilizer easily convertible into uninterruptible power supply (UPS) |
| 11/23/1988 | CN88202072U Separating controller for music rhythm |
| 11/22/1988 | US4787023 Power supply apparatus |
| 11/22/1988 | US4787021 Current-type converter apparatus |
| 11/22/1988 | CA1245285A1 Ac voltage regulator |
| 11/17/1988 | EP0291085A2 Impulse control of lighting, motor r.p.m., vibrational tape drive, and grid disturbance trip at reduced power consumption |
| 11/16/1988 | CN88202344U Current and voltage converter |
| 11/09/1988 | CN88201849U Bidirectional controlled silicon a.c. current stabilizer |
| 11/08/1988 | US4783728 Modular power supply with PLL control |
| 11/02/1988 | EP0289373A1 Pulse width modulation converter |
| 11/02/1988 | CN88102486A Current source power converting apparatus with overvoltage protection |
| 11/01/1988 | CA1244095A1 Saturation monitoring arrangement and method of control for a frequency-converter welding device |
| 10/26/1988 | CN87214389U Transformerless current-stabilied continuous source for a solid laser |
| 10/25/1988 | US4780802 Control circuit for removing ripple of direct current supply system for voltage source inverter |
| 10/25/1988 | US4780788 Two-wire switch with a power transistor |
| 10/25/1988 | US4779709 Apparatus for controlling AC elevators |
| 10/19/1988 | CN88211341U Contact induction stepless voltage regulator |
| 10/19/1988 | CN88203100U Push-key electronic stepless voltage regulator |
| 10/19/1988 | CN88200403U 三相无级调压器 Three-phase stepless regulator |
| 10/19/1988 | CN88200058U Miniature household voltage regulator |
| 10/19/1988 | CN88101891A Electric power converter |
| 10/18/1988 | US4779181 Multiphase low harmonic distortion transformer |
| 10/18/1988 | US4779036 AC power control apparatus |
| 10/18/1988 | US4779034 Forced commutation for variable speed motor |
| 10/11/1988 | US4777581 Modulation method and apparatus for static power frequency changers |
| 10/06/1988 | WO1988007784A1 Pulse width modulation converter |
| 10/05/1988 | CN87211374U Multifunction touching type voltage regulating switch |
| 10/05/1988 | CN87208958U Switching type alternating voltage segulating / modutating apparatus |
| 10/05/1988 | CN86103420B New type welding transformer |
| 09/21/1988 | CN88200499U Automatic illumination-regulating device for keeping illumination constant |
| 09/20/1988 | US4772997 Method for starting up a converter drive comprising an intermediate current link converter with phase sequence quenching |
| 09/20/1988 | US4772824 Double three-way dimming system |
| 09/14/1988 | EP0281788A1 Method and circuit arrangement for the independent control of a current vector's components |
| 09/07/1988 | CN88100824A Controlling apparatus for alternating current elevator |
| 09/07/1988 | CN87215148U Micro-computer controlled transistor thyratron low frequency power supply |
| 08/31/1988 | CN87207922U Transistor transformer of safety lamp |
| 08/24/1988 | EP0250552A4 Power converter for an electrically-compensated constant speed drive. |
| 08/24/1988 | CN88100909A Arrangement for transferring electric power |
| 08/23/1988 | US4766360 Induction generator/motor system |
| 08/17/1988 | EP0278491A2 Power converter |
| 08/17/1988 | EP0278369A2 Control apparatus for cascaded converter circuit |
| 08/17/1988 | CN87215724U Multifunctional electric generator with high efficiency |
| 08/16/1988 | US4764859 Method and apparatus for controlling circulating-current type cycloconverter |
| 08/11/1988 | DE3702834A1 AC voltage stabiliser |
| 08/09/1988 | US4763059 Method and apparatus for induction motor drive |
| 08/04/1988 | DE3616480A1 Circuit for carrying out the method for an electrical load which is supplied from a three-phase voltage source |
| 08/03/1988 | CN88203001U Safety power source |
| 08/02/1988 | US4761726 Variable speed constant frequency power system with boost converter auxiliary output |
| 08/02/1988 | CA1239986A1 Control of a series resonant converter |
| 07/28/1988 | DE3700863A1 Electric regulation arrangement for maintaining a uniform control voltage |
| 07/27/1988 | EP0275483A1 Three-phase transformer for cycloconverter |
| 07/27/1988 | CN88100162A Current type converter apparatus |
| 07/26/1988 | CA1239662A1 Microcomputer-controlled light switch |
| 07/06/1988 | EP0273899A1 Pulse width modulation inverter |
| 07/06/1988 | EP0273598A2 DC link variable speed constant frequency parallel power system and control method |
| 06/30/1988 | WO1988004875A1 Light dimmer for distributed use employing inductorless controlled transition phase control power stage |
| 06/22/1988 | CN87205209U Electric source for ac capacitor ageing test |
| 06/21/1988 | US4752866 Ozonator power supply employing a current source inverter |
| 06/16/1988 | DE3641308A1 Circuit arrangement having a controlled rectifier bridge circuit, on which a single-phase or multi-phase voltage acts, and having an invertor which is supplied from said rectifier bridge circuit |
| 06/15/1988 | CN86108115A Automatic ac voltage regulator with switch voltage compensation |
| 06/07/1988 | US4750102 Power converting apparatus |
| 06/07/1988 | US4750098 Unrestricted frequency changer with current source output |
| 05/31/1988 | CA1237473A1 Frequency divider |
| 05/31/1988 | CA1237472A1 Static energy frequence converter |
| 05/25/1988 | EP0267915A1 Modulation method and apparatus for static power frequency changers |
| 05/24/1988 | US4747035 Isolator for power system instrument |
| 05/18/1988 | CN87201177U Inductive load silicon control single phase power regulator zero triggering |
| 05/17/1988 | US4745352 Switching AC voltage regulator |
| 05/17/1988 | US4745300 Two-wire switch |
| 05/17/1988 | US4745263 Current regulator for carpet seaming apparatus |
| 05/11/1988 | DE3636902A1 Transformer arrangement |
| 05/04/1988 | EP0265867A2 Apparatus for controlling power converters |
| 05/04/1988 | CN87107172A Controller of electric power convertor |
| 05/03/1988 | US4742441 High frequency switching power converter |
| 04/27/1988 | EP0237551A4 Single to three-phase voltage converter. |
| 04/27/1988 | CN87207395U Power source apparatus of nonindustrial frequency transformer |
| 04/20/1988 | EP0263966A1 Power control system |
| 04/12/1988 | US4737900 Method of and apparatus for controlling the braking resistor of a frequency converter |
| 04/12/1988 | US4737609 Push button switch |
| 04/07/1988 | WO1988002573A1 Static power conversion method and apparatus |
| 04/05/1988 | US4736148 AC motor control method and its control apparatus |