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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08/06/1991 | US5038244 Device for overvoltage protection of a rectifier bridge feeding a d.c. motor and for control of the d.c. motor during emergency braking |
08/06/1991 | US5038081 Reverse phase-controlled dimmer |
07/30/1991 | US5036448 DC to AC inverter and method for producing three phases from two input phases |
07/30/1991 | US5036234 Control circuit for triacs |
07/24/1991 | CN2081623U Improved touching stepless adjusting table lamp |
07/24/1991 | CN2081586U Multi-functional light-adjusting speed-regulating electronic socket |
07/24/1991 | CN1013332B Controller of pulsewidth modulation inverter by using micro processor |
07/23/1991 | US5034669 Regenerative circuit for motor drive system having leakage current compensation |
07/23/1991 | CA1286716C Reactive power processing circuit for a current source gto inverter |
07/17/1991 | EP0436665A1 Variable speed, constant frequency generating system with input transformer |
07/09/1991 | US5030890 Two terminal incandescent lamp controller |
07/03/1991 | EP0434889A2 Inverter and power supply systems including same |
07/03/1991 | CN2080284U Touch type light-adjusting switch with display |
07/02/1991 | US5029062 Electrical regulation and energy transfer circuit |
06/27/1991 | WO1991009411A1 Variable power drive circuit |
06/27/1991 | DE4037390C1 Voltage supply for inverter controller - has intermediate circuit connected via power Zener diodes and isolation diodes |
06/26/1991 | EP0433966A1 Method and circuiting for driving a plurality of triacs |
06/26/1991 | CN2079815U Controllable voltage regulating socket board for power supply |
06/26/1991 | CN2079770U Clock controlled multifunctional socket |
06/23/1991 | CA2032917A1 Method and circuit for gating plural triacs |
06/19/1991 | CN2079365U Multi-purpose silicon-adjustable voltage-adjusting energy-saving socket box |
06/19/1991 | CN2079363U Power adjustable inseting connector |
06/18/1991 | US5025134 Means for refreshing a triac control circuit power supply |
06/18/1991 | CA1285047C Apparatus for stabilizing turbine-generator shaft torsional oscillations |
06/12/1991 | EP0431063A1 Notch cutting circuit with minimal power dissipation |
06/12/1991 | CN1052227A Voltage regulator with ordinary switch for regulation and method thereof |
05/28/1991 | US5019766 Method and apparatus for improving performance of AC machines |
05/23/1991 | DE4032410A1 Electrical light supply - has voltage reduced by diode, inductance or thyristor circuit to improve operational life |
05/22/1991 | EP0428035A2 Three-phase cycloconverter |
05/21/1991 | WO1991007807A1 Dc/dc power transformer |
05/21/1991 | US5018058 High frequency AC voltage control |
05/21/1991 | US5017857 Circuit and method for voltage regulation of electric power sources |
05/21/1991 | US5017800 AC to DC to AC power conversion apparatus with few active switches and input and output control |
05/15/1991 | EP0427709A2 Power control circuit |
05/14/1991 | US5016157 VSCF system with DC link harmonics control |
05/14/1991 | CA1284178C Switching ac voltage regulators |
05/02/1991 | WO1991006047A1 Reverse phase control switching circuit and method without zero crossing detection |
04/23/1991 | US5010471 Three-phase AC-to-AC series resonant power converter with reduced number of switches |
04/18/1991 | DE3934400A1 AC-DC-AC inverter operation for three=phase motor supply - involves two thyristor inverters switched from sinusoidal phase current mode to indirect mode at transitional speed |
04/11/1991 | DE3933525A1 Inverter-fed motor excitation with isolated stator windings - involves switching between direct and indirect operations at different phases of sinusoidal cycle for separate inverters |
04/11/1991 | DE3933524A1 Inverter-fed motor operation with isolated stator windings - allows direct inverter operation at low speeds with quadrature sinusoidal currents from independent-fired thyristor bridges |
04/11/1991 | DE3933522A1 Frequency-dependent operation of parallel three=phase inverters - involves switching to indirect inverter operation at higher machine frequencies when one bridge current is zero |
04/11/1991 | DE3933520A1 Frequency-dependent operation of parallel three=phase inverters - involves switching to indirect inverter operation at higher machine frequencies by change of thyristor firing pattern |
04/10/1991 | EP0421534A1 Circuit arrangement for power supply to a load |
04/10/1991 | EP0420901A1 Procedure and apparatus for the control of electric power. |
04/09/1991 | US5006973 Autotuned resonant power source |
04/05/1991 | WO1991005401A1 Process and device for adjusting and controlling a.c. voltages from the public mains |
04/05/1991 | CA2042589A1 Process and device for adjusting and controlling a.c. voltages from the public mains |
04/04/1991 | DE4007579C1 Low current control circuitry for thyristor setter - discharges capacitor to trigger dials via current regulating stages working practically independent of supply voltage |
04/03/1991 | EP0420628A2 AC to DC to AC power conversion apparatus with few active switches and input and output control |
04/03/1991 | EP0419656A1 Speed controller |
04/02/1991 | US5005115 Forced-commutated current-source converter and AC motor drive using the same |
04/02/1991 | US5005113 Hybrid circuit module having bridge circuit and rectifying circuit disposed on a same substrate |
04/02/1991 | US5004969 Phase control switching circuit without zero crossing detection |
03/30/1991 | CA2025847A1 Ac to dc to ac power conversion apparatus with few active switches and input and output control |
03/27/1991 | EP0418832A2 Control method and apparatus |
03/27/1991 | EP0418332A1 Low distortion control for a vscf generating system |
03/27/1991 | CN1012245B Industrial-frequency phase transformer |
03/21/1991 | WO1991003869A1 Variable speed ac drive control |
03/20/1991 | EP0417805A1 Control method and device for AC motor |
03/20/1991 | CN2073629U Three phases capacity type of constant current rectificating device |
03/14/1991 | WO1991004606A1 Regulated ac power system energized by variable speed prime mover |
03/13/1991 | EP0416050A1 A device with a multi-phase load, a static converter and choke coils. |
03/13/1991 | CN2073191U A.c. silicon-controlled voltage regulator |
03/12/1991 | CA1281370C Wall box dimmer switch with plural remote control switches |
03/06/1991 | CN2072745U Voltage regulator |
03/06/1991 | CN2072744U Alternating-current voltage regulator |
03/06/1991 | CN1049759A Technology for increasing electric power of electric appliance |
02/19/1991 | CA1280463C Apparatus for controlling power transducers of the pulse width modulation (pwm) control type |
02/13/1991 | CN2071393U Voltage adjusting socket for electric heater |
02/13/1991 | CN1049253A Voltage-type pwm converter/inverter system and process for controlling the same |
02/13/1991 | CN1049252A Frequency-independent single-phase to three-phase ac power conversion |
02/13/1991 | CN1011580B Controlling apparatus for alternating current elevator |
02/12/1991 | US4992925 Converter with intermediate d.c. circuit |
02/12/1991 | US4992920 Regulated AC power system energized by variable speed prime mover |
02/12/1991 | US4992721 Inverter for starting/generating system |
02/12/1991 | US4992718 Electric floor cleaner with a soft start function |
02/06/1991 | CN2070967U Inphase vector voltage and current regulator |
01/30/1991 | EP0410866A1 Multioutput power converter |
01/30/1991 | EP0410574A2 Adjustable AC power supply equipment for air-conditioner system |
01/30/1991 | EP0410463A2 Voltage-type PWM converter/inverter system and method of controlling the same |
01/23/1991 | CN2070058U Series-type intermediate frequency power supply made of thyristor |
01/23/1991 | CN2070051U Energy-saving capacitance-type automatic charger |
01/23/1991 | CN1011373B Arangement for high frequency link power conversion |
01/16/1991 | EP0408534A2 Phase switched power controller |
01/15/1991 | US4985819 AC-DC-AC apparatus having battery charging and discharging feature |
01/09/1991 | CN1011172B Microcomputer system for controlling thyristor mid-frequency power source |
01/08/1991 | US4983856 Method and system for interconnecting in quadrature two synchronous or asynchronous three-phase networks |
01/03/1991 | DE3920812A1 Self-commutating thyristor regulator for rotary electrical machine - uses pairs of thyristors coupled in antiparallel to each network and each motor phase |
01/02/1991 | EP0405653A2 Electric energy power converter of which commutation is aided by an active control of the supplying voltage of the voltage inverter circuit |
01/02/1991 | EP0404926A1 Paralleling method and control for a vscf system |
01/02/1991 | EP0404907A1 Three phase inverter power supply with balancing transformer |
12/25/1990 | USRE33504 Wall box dimer switch with plural remote control switches |
12/20/1990 | DE3918809A1 Master-slave dimmer with opto-couplers and triacs - has series connection of controlling inputs overridden by fast-switching short-circuit protective thyristors gating arrangement |
12/19/1990 | CN2067884U Remote-control stepless light regulating lamp |
12/19/1990 | CN1010913B Ac frequency converter speed governing equipment and inverter circuit |
12/18/1990 | US4979087 Inductive coupler |
12/18/1990 | US4978894 Single phase to three phase rectifier/inverter with DC ripple compensation |
12/12/1990 | EP0401339A1 Phase separation control |
12/06/1990 | WO1990015471A1 Phase converter |