| 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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| 07/28/1999 | CN1224271A Quasi-stationary current and voltage controlled AC load arrangement |
| 07/22/1999 | DE19801711A1 Controlled power supply for magnetron |
| 07/15/1999 | DE19819809C1 Reducing the intermediate circuit tension in an electrically driven injection machine and process equipment |
| 07/14/1999 | CN1222784A Method for low-transient power control of electrical loads, and electric heating apparatus |
| 07/07/1999 | CN2328121Y Electric power transmission device between ship and harbour |
| 07/07/1999 | CN1222266A AC/AC converter |
| 07/06/1999 | US5920467 Power converter for converting AC shore power to shipboard use |
| 06/30/1999 | CN2327116Y AC.-dc. safety energy-saving electric-power-supply converter |
| 06/29/1999 | US5917302 Harmonic current attenuating device of a motor |
| 06/29/1999 | US5917290 Parallel-storage series-drive electronic ballast |
| 06/29/1999 | CA2046268C Process and device for controlling single-phase or multiphase a.c. controllers |
| 06/23/1999 | CN2325922Y AC-DC insulation module |
| 06/23/1999 | CN1043830C Power converter |
| 06/17/1999 | DE19755127A1 Step-down converter for alternating voltages |
| 06/09/1999 | EP0792533B1 A system for off-mains switching of current consuming devices such as actuators |
| 06/09/1999 | CN2323509Y Miniature waterproof solid voltage changing module |
| 06/02/1999 | EP0920116A2 Inverter apparatus for supplying drive power to an electric motor, and filter apparatus for use in the inverter apparatus |
| 06/02/1999 | EP0919019A1 Energy saving power control system |
| 06/02/1999 | CN2322302Y UPS power source without inverter |
| 06/01/1999 | US5909367 Modular AC-AC variable voltage and variable frequency power conveter system and control |
| 05/27/1999 | DE19751828A1 Identifying and control of electronic mains switch parts, esp. for illumination units |
| 05/26/1999 | EP0918449A1 Circuit for control of fluorescent lamp |
| 05/26/1999 | CN2321164Y High-fidelity sine-wave voltage frequency changer |
| 05/25/1999 | US5907223 Two-frequency electronic ballast system having an isolated PFC converter |
| 05/25/1999 | US5907198 Trickle power supply |
| 05/20/1999 | WO1999025159A1 Parallel-storage series-drive electronic ballast |
| 05/20/1999 | WO1999025061A1 Circuit for transforming, switching, adjusting or controlling electric power |
| 05/20/1999 | CA2276726A1 Parallel-storage series-drive electronic ballast |
| 05/19/1999 | EP0917270A2 Power flow control and power recovery with rotary transformers |
| 05/19/1999 | EP0916785A1 Vibrator for compacting concrete |
| 05/19/1999 | EP0916168A1 A phase control device |
| 05/19/1999 | CN2319955Y Electronic regulation switch |
| 05/19/1999 | CN2319954Y Energy saving protector |
| 05/18/1999 | US5905642 Apparatus and method to reduce common mode voltage from current source drives |
| 05/18/1999 | US5905371 For transferring energy from a power source to an output node |
| 05/14/1999 | WO1999023750A1 Power converter |
| 05/12/1999 | DE19748134A1 Distributing limited electric power in irons |
| 05/12/1999 | CN1216413A Power source regulating circuit and its application |
| 05/11/1999 | US5903139 For controlling the current in a power supply line to a load |
| 05/06/1999 | WO1999013560A3 Precharging circuit for a capacitor connected to the output of a line-commutated power converter |
| 05/06/1999 | EP0913916A2 Three-phase transformer |
| 05/06/1999 | EP0698310B1 High frequency ac/ac converter with power factor correction |
| 05/06/1999 | DE19746797A1 Procedure for controlling bi-directional switches in converters |
| 05/05/1999 | CN2317579Y Three phase electric power automatic controller |
| 05/05/1999 | CN2317578Y Multipurpose machine for repairing or testing |
| 04/28/1999 | CN1215248A Harmonic current attenuator for electric motor |
| 04/28/1999 | CN1215246A Frequency converter for outoging electric driving power to motor and filter installed on it |
| 04/28/1999 | CN1215245A Frequency converter |
| 04/27/1999 | US5898584 Circuit for supplying power to ceiling fan |
| 04/22/1999 | WO1999020082A1 Method of and apparatus for generating an electrical signal |
| 04/21/1999 | CN2315721Y Movable multipurpose stepless regulating switch |
| 04/15/1999 | WO1999018651A1 Phase controlled dimming system with active filter for preventing flickering and undesired intensity changes |
| 04/15/1999 | DE19744607A1 Control circuit and current supply for symmetrical AC power controllers |
| 04/14/1999 | CN2314511Y Computer controlled automatic voltage step-up separating device |
| 04/14/1999 | CN1213887A U-shape inverter |
| 04/14/1999 | CN1213886A Portable power unit |
| 04/13/1999 | CA2160866C Method and apparatus for receiving a universal input voltage in a welding power source |
| 04/07/1999 | EP0906846A1 Pwm converter control apparatus |
| 04/06/1999 | US5892677 Adaptive overlapping communication control of modular AC-AC converter and integration with device module of multiple AC-AC switches |
| 04/06/1999 | US5892674 Method and apparatus for power converting AC into DC or DC into AC by converter having common phase connection |
| 04/06/1999 | US5892667 Symmetrical power system |
| 04/06/1999 | US5892391 TRIAC/SCR proportional control circuit |
| 04/06/1999 | CA2156123C Voltage, phase and frequency control by miniature inverter system |
| 04/01/1999 | WO1999016164A1 Power conversion apparatus and air conditioner using the same |
| 03/31/1999 | EP0905871A2 A.C. to A.C. line frequency power converter |
| 03/31/1999 | EP0905870A2 Duty cycle based AC power control with reduced voltage fluctuations |
| 03/31/1999 | EP0905582A2 Fixing unit for use in image forming device |
| 03/30/1999 | US5889666 Method and apparatus for controlling providing of conditioned AC power |
| 03/30/1999 | US5889661 Power conversion apparatus, control method and uninterruptible power supply equipped with the apparatus |
| 03/25/1999 | WO1999000883A3 Procedure to connect an asynchronous generator on an alternating current and an electrical connecting for use at this procedure |
| 03/24/1999 | EP0903841A1 Ac/ac converter |
| 03/23/1999 | US5886893 Portable power unit using a cycloconverter for generating a high power single-phase alternating current |
| 03/18/1999 | WO1999013560A2 Precharging circuit for a capacitor connected to the output of a line-commutated power converter |
| 03/18/1999 | DE19736264A1 Energy-saving apparatus for household and industry |
| 03/11/1999 | DE19739553A1 Vorladeschaltung für einen am Ausgang eines netzgeführten Stromrichters angeschlossenen Kondensator Pre-charge a capacitor connected to the output of a line-commutated converter |
| 03/10/1999 | EP0775383A4 Control circuit for cryogenically-cooled power electronics employed in power conversion systems |
| 03/10/1999 | CN2310420Y Single, three phases leakage flux magnetic path type magnetic voltage regulator |
| 03/10/1999 | CN1042482C Tranforming device and air conditioner using said device |
| 03/09/1999 | US5880578 Power control unit |
| 03/04/1999 | DE19736903A1 Converter with rectifier, inverter and intermediate circuits |
| 03/03/1999 | EP0899859A2 Intermediate voltage link inverter |
| 03/03/1999 | EP0847615B1 Method and device for controlling a four-dimensional vector for a controlled system by means of a discrete-value control element with a limited switching frequency |
| 03/03/1999 | CN2309665Y Power supply device for induction electric heating petroleum |
| 03/03/1999 | CN1209687A Harmonic current attenuation device for electric motor |
| 03/03/1999 | CN1209681A Wave-shape continuously changing method in power changing technology |
| 02/11/1999 | DE19734107A1 Dimmer |
| 02/10/1999 | CN2307400Y Additional power supply voltage regulator |
| 02/10/1999 | CN1042080C Inverter apparatus |
| 02/03/1999 | EP0843913A4 Appliance ac power control apparatus |
| 02/03/1999 | CN2306611Y 电子功率调节器 Electronic power regulator |
| 02/03/1999 | CN2306610Y High-voltage integrated module for air purifier |
| 02/02/1999 | US5867016 Duty cycle based AC power control with reduced voltage fluctuations |
| 01/28/1999 | DE19731690A1 Power amplifier, especially gradient amplifier |
| 01/27/1999 | CN1206242A Power conversion apparatus |
| 01/26/1999 | CA2009297C Method and apparatus for controlling single or multiphase a.c. power controllers |
| 01/14/1999 | DE19718814A1 Power control method for electrical load connected to a.c. voltage supply network |
| 01/13/1999 | EP0891037A2 Pulse width modulation method for series connected converters |
| 01/13/1999 | EP0891035A2 Circuit for feeding a load |
| 01/13/1999 | EP0500738B1 Dc/dc power transformer |
| 01/13/1999 | CN1204937A Power control unit |