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