| 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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| 03/04/1992 | EP0472614A1 Supply voltage circuit with controllable output power |
| 03/04/1992 | CN1059253A High voltage inductive-type illumination transformation device |
| 03/03/1992 | US5093614 Three phase delta reference transformer |
| 03/03/1992 | CA1296768C Regulating transformer system |
| 02/27/1992 | DE4026350A1 Phase chopping control circuit for LV load - uses AC ignition unit lying between RC phase shifter and semiconductor switching unit |
| 02/26/1992 | CN2097479U Touch type electronic voltage-regulating switch |
| 02/26/1992 | CN2097472U Stepless speed-regulating timer for wall lamp type ceiling fan |
| 02/25/1992 | US5091823 Inverter device |
| 02/25/1992 | US5091069 Utilize a current fed inverter power supply which only supplies a controlled output current waveform to the load, prevents short circuit |
| 02/25/1992 | CA1296384C Frequency converter and a method of applying same |
| 02/19/1992 | EP0471183A2 Minimizing network harmonics from transformer circuits |
| 02/19/1992 | CN2096811U Pullswitch for light regulating |
| 02/18/1992 | US5089760 DC bus voltage regulation by controlling the frequency in a variable frequency inverter |
| 02/12/1992 | CN2096160U Zero current trigger scr single phase power adjuster |
| 02/12/1992 | CN2096121U Two phase constant power multi-stage loaded voltage regulating switch |
| 02/11/1992 | CA1295672C Quasi-resonant current mode power conversion method and apparatus |
| 02/11/1992 | CA1295669C Converter system for coupling two high voltage three-phase networks |
| 02/06/1992 | DE4037531A1 Controlling rectifiers in AC inverter for locomotive traction - forming AC rated value by multiplying regulating signal with sinusoidal signal at frequency of AC actual value |
| 01/29/1992 | CN2094848U Lamp infrared ray remote controller |
| 01/29/1992 | CN2094847U Small multi-purpose electronic light regulator |
| 01/29/1992 | CN2094829U Ac electronic voltage regulator |
| 01/29/1992 | CN2094828U Salt-bath furnace voltage-regulating power source without power cutting off |
| 01/29/1992 | CN2094806U Voltage adjusting multi-purpose socket |
| 01/29/1992 | CN1058306A Shock-proof voltage regulator |
| 01/28/1992 | US5084812 Arrangement for converting two single-phase alternating currents into a symmetric three-phase current |
| 01/23/1992 | WO1992001329A1 Solid state high frequency ac voltage control apparatus |
| 01/22/1992 | CN2094153U Automatic speed-changing and timing electric fan with top and bottom gears |
| 01/16/1992 | DE4021008A1 Assembly of converters, each with rectifier - provides DC voltage intermediate circuit with capacitor(s), and two inverters |
| 01/15/1992 | CN2093464U 电压适配器 Voltage adapters |
| 01/15/1992 | CN2093463U Adjustable power type electronic transformer |
| 01/14/1992 | US5081411 AC/DC two-wire control techniques |
| 01/14/1992 | CA1294326C Electronic controller powered during the inactive periods in the mains switching |
| 01/08/1992 | CN2092843U Light adjusting switch with power saving function |
| 01/08/1992 | CN2092831U Converting overrunning dc-to-ac governor of generator |
| 01/08/1992 | CN2092830U Adjusting voltage device with power saving function for the use of equipment of single phase electricity |
| 01/07/1992 | US5079499 Transformer providing two multiple phase outputs out of phase with each other, and pumping system using the same |
| 01/07/1992 | US5079410 Power control system adaptable to a plurality of supply voltages |
| 12/26/1991 | WO1991020122A1 Frequency converter with dc voltage intermediate circuit |
| 12/24/1991 | CA1293529C Ac motor drive apparatus |
| 12/19/1991 | DE4018748A1 Frequenzumrichter mit gleichspannungs-zwischenkreis Inverter with equal-voltage intermediate circuit |
| 12/18/1991 | CN2091051U Household electric heater |
| 12/12/1991 | DE4105132C1 Non-potential generating supply circuitry for electric motor - has transformer with sec. winding supplying control and auxiliary units of inverter |
| 12/10/1991 | US5072170 Reverse phase angle control of A.C. power loads |
| 12/10/1991 | CA1293021C Static power conversion method and apparatus |
| 12/04/1991 | CN2090128U Plug electronic transformer |
| 12/04/1991 | CN1014969B Control device of alternating-current electrical lift |
| 12/03/1991 | US5070441 Distribution of power from a six phase powerline to one- and three- phase loads |
| 11/28/1991 | WO1991018487A1 Regulator for two lamps of different strengths |
| 11/26/1991 | US5068576 Remote control of fluorescent lamp ballast using power flow interruption coding with means to maintain filament voltage substantially constant as the lamp voltage decreases |
| 11/26/1991 | CA1292512C Method and system for quadrature interconnection of two synchronous or asynchronous three-phase networks |
| 11/26/1991 | CA1292506C Method and apparatus for induction motor drive |
| 11/20/1991 | CN2089220U Multifunction recessed light- and speed-regulating electronic switch |
| 11/19/1991 | US5066896 Electric lighting and power controllers therefor |
| 11/19/1991 | CA1292272C Current source inverter control system for load commutated induction motor drive |
| 11/13/1991 | CN2088770U Light stepless changing controller |
| 11/13/1991 | CN2088760U Voltage lifting regulator for tractor permanent magnetic a.c generator |
| 11/12/1991 | US5065305 Rotary phase converter having circuity for switching windings to provide reduced starting current with rapid, dependable starting |
| 11/12/1991 | US5065302 Adjustable ac power supply equipment for air-conditioner system |
| 11/12/1991 | US5064075 Separation of non-magnetic electrically conductive items by electromagnetic eddy current generation |
| 11/12/1991 | CA1292039C Digitally-controlled cycloconverter |
| 11/06/1991 | CN2088305U Safety universal power supply |
| 11/05/1991 | US5063487 Main and auxiliary transformer rectifier system for minimizing line harmonics |
| 10/31/1991 | WO1991012922A3 Alternative current source for welding |
| 10/30/1991 | CN2087842U Power controller for domestic electrothermal appliance |
| 10/23/1991 | EP0452715A2 Apparatus for continuous control of electric devices according to the phase chopping principle, especially light dimmer, and use of such apparatus |
| 10/23/1991 | EP0452431A1 Process and device for adjusting and controlling a.c. voltages from the public mains |
| 10/23/1991 | EP0452321A1 Signal conditioning device |
| 10/17/1991 | WO1991015297A1 Process for controlling the current supply device of an electrofilter |
| 10/16/1991 | CN2086942U Receptacle with adjustable power and alarming |
| 10/10/1991 | DE4108811A1 Regulating current supply to electro-filter - measuring parameters on primary side for regulation of filter voltage |
| 10/09/1991 | EP0450126A1 Protection and monitoring device for a pulse resistor of a voltage intermediate circuit converter |
| 10/09/1991 | CN2086179U Alternating current arc-welding machine |
| 10/09/1991 | CN1014287B Combined multifunctional efficient electronic transformer |
| 10/08/1991 | US5055989 Three phase to single phase converter |
| 10/01/1991 | US5053938 Power converter having control circuitry for the voltage supplied to the inventer |
| 10/01/1991 | US5053689 Method and apparatus for improving performance of AC machines |
| 09/26/1991 | DE4008904A1 Network supply circuit for LV load resistances - uses trial controlled by ignition circuit with schmitt trigger |
| 09/25/1991 | CN2085580U Stepless voltage regulating switch |
| 09/18/1991 | EP0446844A2 Cycloconverter and the method of controlling the same |
| 09/18/1991 | CN2085112U Numerical-type zero-trigger scr main frequency voltage regulator |
| 09/18/1991 | CN2085111U Timely automatic voltage regulator |
| 09/17/1991 | US5050059 Frequency changer having parallel partial frequency changers with a DC circuit |
| 09/17/1991 | US5050057 Power source apparatus |
| 09/10/1991 | US5047915 Unrestricted frequency converter for unbalanced loads |
| 09/10/1991 | US5047909 Power conversion apparatus with harmonic filtration |
| 09/05/1991 | WO1991013488A1 Regulating system for an indirect voltage converter |
| 09/04/1991 | EP0444428A2 PWM-controlled power supply including choke coil with 3 windings |
| 09/03/1991 | US5045989 PWM power supply eliminating modulation-frequency components from ground potentials |
| 09/03/1991 | US5045774 Full scale AC or DC power attenuator |
| 08/29/1991 | DE4006163C1 Protecting power electronics equipment - regulating intermediate circuit for constant voltage and operating short-circuiting protector upon overvoltage |
| 08/22/1991 | DE4004667A1 Wechselstromquelle zum schweissen Welding AC power source |
| 08/17/1991 | WO1991012922A2 Alternative current source for welding |
| 08/14/1991 | EP0440852A1 Control method and device for damping resonance oscillations in a parallel resonant circuit for a pulse inverter of a current source converter |
| 08/14/1991 | CN2082918U Multipurpose electricity-saving device |
| 08/14/1991 | CN2082917U Automatic a.c. voltage regulator |
| 08/08/1991 | WO1991011841A1 Cycloconvertor equipment |
| 08/08/1991 | WO1991011732A1 Method and device for radio-navigational determinations using artificial earth-satellites |
| 08/08/1991 | CA2035730A1 Control process and trigger equipment for damping resonant vibrations of a parallel-resonant circuit for a pulse-controled inverter of a c urrent-source inverter |
| 08/07/1991 | EP0440245A2 Power source circuit |
| 08/06/1991 | US5038265 Power supply with multiple outputs and load balancing |