Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02M - Apparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems; Conversion of dc or ac input power into surge output power; Control or regulation thereof › 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
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)
12/1990
12/06/1990CA2035898A1 Phase converter
12/05/1990CN1010730B Inverter controlling method
12/05/1990CN1010729B Electric power converter
12/04/1990US4975670 Air cooled transformer
12/04/1990US4975630 Constant power supply unit of electric heating apparatus
12/04/1990US4975629 Inductorless controlled transition and other light dimmers
11/1990
11/28/1990CN2066637U Electricity saving adjustor
11/28/1990CN1047423A Electric transformer without idling loss
11/28/1990CN1010641B Current type converter apparatus
11/28/1990CN1010640B Controller of electric power converter
11/14/1990EP0397128A2 Frequency-independent singlephase to three-phase AC power conversion
11/14/1990CN1047003A Method of using 220 volt single-phase induction regulator for 380 volt power system
11/12/1990WO1990013940A1 Supply voltage circuit with controllable output power
11/12/1990CA2064009A1 Supply voltage circuit with controllable output power
11/08/1990DE3913932A1 Protection circuit for AC switching of transformer loads - has memory elements to control circuit by detection of current direction
11/07/1990CN2065376U Power-economizing cooker of electric pot
11/07/1990CN1010363B Pulse width modulation controlled type electric power converter controller
11/07/1990CN1010362B Pwm controller
11/06/1990US4969080 A method of decoupling a three-phase converter
11/06/1990US4968926 Power conversion system with stepped waveform DC to AC converter having prime mover start capability
11/06/1990CA1276034C Fault-protection apparatus for static ac-to-ac converters and unrestricted frequency changer (ufc) system including such fault-protection apparatus
11/01/1990WO1990007818A3 Low distortion control for a vscf generating system
10/1990
10/24/1990CN2064554U Electronically light changing pullswitches
10/23/1990US4965508 Power supply circuit having controllable thyristor network and adjustable voltage regulator
10/23/1990CA1275436C Induction generator/motor system
10/17/1990EP0392419A1 Regulation device for one electrical parameter during energy transfer between two networks
10/17/1990CN1046250A Circuit and method for voltage regulation of electric power sources
10/14/1990CA2014381A1 Device for regulating an electrical parameter during energy transfers between two networks
10/10/1990CN2063718U Power regulator with indication and control for household appliances
10/10/1990CN1046071A Power converter with current-type inverter
10/10/1990CN1009983B "comparison-tracking-amplifying" type freq. converter
10/10/1990CN1009981B Current source power converting apparatus with overvoltage protection
09/1990
09/26/1990CN1045667A Device for overvoltage protection of rectifier bridge feeding dc motor and for control of dc motor during
09/26/1990CN1009788B Duplicated ac-ac frequency-changing speed regulation device for ac motors
09/25/1990US4959602 Ac motor drive with improved voltage-source inverter
09/19/1990CN2062537U Stepless light adjusting switch mounted on wall
09/19/1990CN2062521U Voltage regulator controlled by commen switch
09/19/1990CN1045491A Method and apparatus for controlling ac current regulator of single-phase or polyphase
09/11/1990US4956599 Power control apparatus
09/11/1990US4956598 Low distortion control for a VSCF generating system
09/05/1990CN2061742U Small high voltage electrostatic electric source using total transistor
09/04/1990US4954768 Two wire low voltage dimmer
09/04/1990US4954764 Circuit and method for power efficiency improvement of induction motors
08/1990
08/29/1990EP0384222A1 Supply circuit for a multisystem locomotive
08/29/1990EP0383971A1 Supply circuit for a multisystem locomotive
08/23/1990WO1990009695A1 A device with a multi-phase load, a static converter and choke coils
08/23/1990DE3904990A1 Regulated feedback DC voltage intermediate-circuit supply
08/22/1990CN2060958U Power-saving and protecting voltage-adjusting equipment for single-phase sensitive electric appliances
08/22/1990CN1044879A Method and arrangement for controlling single-phase or multiphase ac current regulator
08/21/1990CA1273115A1 Method and apparatus for controlling power converter
08/21/1990CA1273055A1 Superconductive energy storage circuit
08/16/1990EP0381789A1 Control method and device for single or multiphase AC voltage converters
08/15/1990CN2060608U Line-frequency phase converter
08/14/1990US4948987 Secondary electric power source produced by current flow through a primary a.c. power circuit
08/14/1990US4948209 Variable speed, constant frequency starter/generator
08/08/1990WO1990009701A1 Process and device for controlling single-phase or multiphase a.c. controllers
08/08/1990EP0380833A1 Reverse phase-controlled dimmer
08/07/1990US4947079 Notch cutting circuit with minimal power dissipation
08/01/1990CN1044368A Vscf starter/generator systems
07/1990
07/31/1990USRE33285 Touch controlled switch for a lamp or the like
07/18/1990CN2059534U Multifunctional electricity-saving ac socket set
07/18/1990CN1008866B Control method for electric power converting apparatus and their arrangement
07/18/1990CN1008864B Method for controlling circulatory converter and their arrangement
07/13/1990CA2007665A1 Capacitive voltage transformer
07/12/1990WO1990007819A1 Paralleling method and control for a vscf system
07/12/1990WO1990007818A2 Low distortion control for a vscf generating system
07/11/1990EP0377328A2 VSCF starter/generator systems
07/11/1990CN2059285U Micro adjusting box for ac voltage
07/04/1990EP0376728A2 Circuit and method for voltage regulation of electric power sources
07/01/1990CA2005961A1 Vscf starter/generator systems
06/1990
06/29/1990CA2005093A1 Circuit and method for voltage regulation of electric power sources
06/28/1990WO1990007224A1 Phase separation control
06/27/1990EP0375288A1 Electric lighting and power controllers therefor
06/26/1990US4937730 Constant voltage power supply
06/26/1990US4937723 VSCF system with an overload protection
06/26/1990US4937720 PWM inverter circuit analytically compensating for DC link distortion
06/20/1990EP0155300B1 Current regulator for carpet seaming apparatus
06/19/1990US4935860 PWM inverter circuit having modulated DC link input
06/19/1990US4935859 PWM inverter circuit having a filtered fundamental feedback DC link variation circuit
06/19/1990US4935772 Method of and apparatus for controlling photographic printing lamp light output
06/19/1990US4935691 Phase switched power controller
06/19/1990US4934822 PWM-controlled power supply capable of eliminating modulation-frequency signal components from ground potentials
06/19/1990CA1270521A1 Voltage control system
06/12/1990US4933831 Power supply
06/12/1990US4933828 Control system for voltage-source pulse width modulation step-up rectifier
06/12/1990US4933798 Self protecting and automatic resetting capacitor synchronous switch apparatus for control of AC power to inductive loads
05/1990
05/31/1990WO1990006014A1 Three phase inverter power supply with balancing transformer
05/30/1990CN2057790U Low voltage alternating current, direct current subsection heating electric mattress
05/29/1990US4930064 Phase stabilized high frequency link power converter apparatus having a wide phase controllable range
05/17/1990WO1990005406A1 Variable speed, constant frequency generating system with input transformer
05/15/1990US4926307 Polyphase a.c. motor supplied with power via d.c. power supply
05/09/1990CN2057033U Electricity saver for multifunctional electric rice cooker
05/08/1990CA1268812A1 Power supply for a three-phase plasma heating unit
05/03/1990DE3836677A1 Three-phase capacitor circuit for damping commutation overvoltages of a self-commutated invertor having a constant intermediate-circuit current
05/02/1990CN1007860B Microthyristor circuit and device
04/1990
04/24/1990CA1268238A1 Airless spray gun
04/24/1990CA1268206A1 Method of and apparatus for controlling the braking resistor of a frequency converter
04/17/1990US4918590 Hybrid circuit module having bridge circuit and rectifying circuit disposed on a same substrate
04/11/1990EP0363166A1 Method and apparatus for the magnetic separation of non-magnetic electrically conductive materials
04/11/1990CN1041249A Industrial-freq phase transformer
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