| 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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| 04/04/1990 | EP0361834A2 Current source inverter control system for load cummutated induction motor drive |
| 04/04/1990 | CN2055652U Power frequency converter |
| 04/04/1990 | CN2055651U Boosting electronic storage battery for motorcycle |
| 04/04/1990 | CN1041073A Electric power convertor with pulse restrainer |
| 04/04/1990 | CN1041072A Notch cutting circuit with minimal power dissipation |
| 03/28/1990 | EP0360156A2 Power supply |
| 03/28/1990 | CN2055305U Electric-heating cooker power regulator |
| 03/28/1990 | CN2055297U Long-life energy-saving light socket for incandescent bulb |
| 03/27/1990 | US4912618 Variable speed, constant frequency generating system with input transformer |
| 03/21/1990 | CN2054955U Power governor used for electric cooker |
| 03/21/1990 | CN2054954U Silicon-controlled swith witch constant voltage regulating control |
| 03/21/1990 | CN2054953U Safety a c mains |
| 03/21/1990 | CN1040726A Apparatus for conversion |
| 03/21/1990 | CN1040717A Combined multifunctional efficient electronic transformer |
| 03/20/1990 | USRE33184 Power controller circuit with automatic correction for phase lag between voltage and current |
| 03/15/1990 | DE3831126A1 Circuit arrangement and control method for a power inverter having impressed intermediate-circuit voltage |
| 03/15/1990 | DE3830196A1 Method for using phase-gating controllers as frequency converters |
| 03/14/1990 | EP0358470A1 Inductive coupler |
| 03/14/1990 | EP0358225A2 Power converting apparatus including beat suppressor |
| 03/14/1990 | EP0358191A2 PWM-controlled power supply capable of eliminating modulation-frequency signal components from ground potentials |
| 03/13/1990 | US4908757 Static frequency converter, especially a frequency converter controlling and/or adjusting the performance data of an electromotor |
| 03/13/1990 | US4908744 Frequency-independent single-phase to three-phase AC power conversion |
| 03/08/1990 | WO1990002474A1 Notch cutting circuit with minimal power dissipation |
| 03/08/1990 | WO1990002473A1 Programmable light switch |
| 03/07/1990 | EP0356991A2 Inverter device |
| 03/06/1990 | US4907144 Frequency converter and a method of applying same |
| 03/06/1990 | CA1266508A1 Isolator for power system instrument |
| 03/01/1990 | DE3828434A1 Programmierbarer lichtschalter Programmable Light Switch |
| 02/28/1990 | CN1007028B Method of controlling transducer arrangement |
| 02/27/1990 | US4905134 Paralleling method and control for a VSCF system |
| 02/22/1990 | EP0344243A4 Quasi-resonant current mode static power conversion method and apparatus. |
| 02/21/1990 | CN2053402U Magnetic work adjuster |
| 02/21/1990 | CN2053400U Electricity-saving, anti-overflow and anti-burning device for electric rice cooker |
| 02/21/1990 | CN2053399U Three one phases reversible ac convertor |
| 02/20/1990 | CA1266089A1 Method of adjustment of the electrical power in three phase systems and related three phase static voltage regulator |
| 02/20/1990 | CA1266087A1 Method for protecting two static converters with direct-current link from overcurrents |
| 02/14/1990 | EP0354430A2 Converter composed of parallel subconverters with a DC circuit |
| 02/14/1990 | CN2052988U Electronic transformer without iron core |
| 02/14/1990 | CN2052987U Micro power consumption power saving electronic adjuster |
| 02/14/1990 | CN2052965U Multi-purpose socket for electronic stepless voltage adjusting |
| 02/13/1990 | US4901213 Five-legged core type frequency triplo-multiplier |
| 02/13/1990 | US4901001 Power converter for AC load |
| 02/07/1990 | EP0353715A2 Frequency changer |
| 02/07/1990 | CN2052581U Potentiostat for all-automatic save energy refrigerator |
| 02/06/1990 | US4899268 Frequency-dependent single-phase to three-phase AC power conversion |
| 02/06/1990 | CA1265577A1 Electrical control system and driver |
| 02/01/1990 | DE3920691A1 Method for continuous adjustment of the output voltage of a self-commutated DC voltage intermediate-circuit converter |
| 01/31/1990 | CN2051855U Temp.-adjustable electric wax spoon for dentist |
| 01/25/1990 | WO1990000835A1 Signal conditioning device |
| 01/24/1990 | CN2051799U Touch type, energy saving voltage regulating switch |
| 01/23/1990 | US4896242 Direct AC-DC converter fault protection system |
| 01/18/1990 | DE3824259A1 Circuit arrangement for a differential voltage detection on the DC-voltage intermediate circuit of an indirect converter |
| 01/17/1990 | CN2051414U Contact automatic phase-fetching voltage transforming device |
| 01/16/1990 | US4894766 Power supply frequency converter |
| 01/16/1990 | US4894763 AC-AC converter using switches in a DC link |
| 01/11/1990 | DE3913675C1 Commutating arrangement, for frequency converter - has thyristors galvanically connected in pairs and antiparallel to each mains and consumer phase |
| 01/03/1990 | EP0348938A1 Current producing plant supplying mains and consumer |
| 01/02/1990 | US4891562 Hybrid regulator-ballast circuit for high intensity discharge lamps |
| 12/28/1989 | WO1989012950A1 Procedure and apparatus for the control of electric power |
| 12/27/1989 | CN2050237U Automatic adjusting device for alternating current voltage |
| 12/27/1989 | CN1006268B 逆变器 Inverter |
| 12/20/1989 | CN2049818U Ac chopper transformer |
| 12/13/1989 | CN2049434U Power regulated electricity economizer for electric rice cooker |
| 12/13/1989 | CN2049433U Voltage regulating relay |
| 12/13/1989 | CN1006109B Changing from three-phase to two-phase and the three-phase equilibrium tran sformer |
| 12/06/1989 | EP0344243A1 Quasi-resonant current mode static power conversion method and apparatus |
| 12/06/1989 | CN2049059U Electricity saver for road lamp |
| 12/05/1989 | CA1263699A1 Hidden dc-link ac/ac converter using bilateral power switches and motor drive embodying the same |
| 12/05/1989 | CA1263698A1 Matrix converter control system and ac motor drive embodying the same |
| 11/29/1989 | EP0344065A1 Electronic regulator powered during the non-active periods of network commutation |
| 11/29/1989 | EP0343202A1 Control circuit for triacs |
| 11/28/1989 | US4884185 Pulse width modulation converter |
| 11/28/1989 | US4884184 Control apparatus for cascaded converter circuit |
| 11/28/1989 | US4884182 Current source power converting apparatus with overvoltage protection |
| 11/28/1989 | CA1263439A1 Multiplexing apparatus for phase-control circuits |
| 11/22/1989 | CN2048260U Multi-functional voltage regulator |
| 11/21/1989 | US4882664 Synchronous modulation circuit |
| 11/15/1989 | CN2047859U High-voltage power supply for gas-discharge lamp |
| 11/09/1989 | DE3912941A1 Electrical power supply unit |
| 11/07/1989 | US4879639 Power converter for driving an AC motor at a variable speed |
| 11/02/1989 | DE3813314A1 Voltage supply for an electrostatic precipitator (filter) |
| 11/01/1989 | CN1005624B Elevator rescue apparatus during stoppage of power supply |
| 10/31/1989 | US4878010 Electric a.c power switch controller and d.c. power supply method and apparatus |
| 10/24/1989 | US4876637 Power converter and method of controlling the same |
| 10/24/1989 | US4876498 Two wire low voltage dimmer |
| 10/19/1989 | DE3839373A1 Brightness control circuit for incandescent lamps and switched-mode power supplies having a protecting and limiting circuit to obtain an electronic safeguard |
| 10/17/1989 | US4875150 Parallel oscillatory circuit frequency converter with safety circuit |
| 10/17/1989 | US4875149 Phase separation control |
| 10/11/1989 | CN2045912U Stageless voltage-regulating switch |
| 10/10/1989 | US4873619 Method and apparatus for controlling a static converter at an asymetrical network |
| 10/04/1989 | EP0335626A2 Power supply circuit |
| 10/04/1989 | EP0335599A2 Inverter speed control unit |
| 10/04/1989 | CN1036109A Master circuit of the a.c. voltage regulator |
| 10/03/1989 | US4871893 Slide control switch |
| 09/27/1989 | EP0334319A2 Power converter and method of controlling the same |
| 09/27/1989 | CN1035922A Alternating current frequency converten speed governing equipment and inverten circuit |
| 09/26/1989 | US4870556 Method and apparatus for controlling power converter |
| 09/26/1989 | US4870340 Method of and apparatus for reducing energy consumption |
| 09/21/1989 | WO1989008944A1 Thyristor d.c.-a.c. converter with impressed direct current for impressing a load current |
| 09/20/1989 | CN1035743A Controller of pulsewidth modulation inverter by using microprocessor |