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Class Information
Number: 363/55
Name: Electric power conversion systems > Current conversion > Including automatic or integral protection means > For inverters
Description: Subject matter wherein the system for which protection is provided is a D.C. to A.C. converter.

Sub-classes under this class:

Class Number Class Name Patents
363/57 Thyristor inverter 121
363/56.01 Transistor inverter 203

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
6028779 Power inverter device Feb. 22, 2000
6021053 Method and apparatus for switching circuit system including a saturable core device with multiple advantages Feb. 1, 2000
6009003 Current/voltage control apparatus for elevator system Dec. 28, 1999
5784268 Inverter control for support of power factor corrected loads Jul. 21, 1998
5737163 DC-AC converter protection Apr. 7, 1998
5737208 Modular uninterruptable power supply system Apr. 7, 1998
5706187 Switching power source circuitry having a current bypass circuit Jan. 6, 1998
5633790 DV/DT limiting of inverter output voltage May. 27, 1997
5631811 Auxiliary power supply device May. 20, 1997
5602726 Uninterruptive switching regulator Feb. 11, 1997
5596492 Method and apparatus for de-centralized signal frequency restoration in a distributed UPS system Jan. 21, 1997
5555167 Power supply apparatus with a power-saving function Sep. 10, 1996
5535085 Snubber energy recovery circuit for protecting switching devices from voltage and current Jul. 9, 1996
5483167 Computer controlled ground detecting method for inverter unit and apparatus therefor Jan. 9, 1996
5475292 Apparatus for restarting inverter for driving synchronous motor after momentary interruption Dec. 12, 1995
5469350 Voltage boosting power failure protected power supply device Nov. 21, 1995
5457623 High efficiency power converter having diode-controlled switching frequency for illumination loads Oct. 10, 1995
5446645 Inverter apparatus and uinterruptible power supply using the same Aug. 29, 1995
5444594 Snubber energy recovery circuit for protecting switching devices from voltage and current Aug. 22, 1995
5430636 Inverter apparatus and inverter controlling method having fault protection Jul. 4, 1995
5426530 Extraction and trapping of IR Jun. 20, 1995
5418707 High voltage dc-dc converter with dynamic voltage regulation and decoupling during load-generated arcs May. 23, 1995
5383106 Regenerative control type switching power source device Jan. 17, 1995
5379206 Low loss snubber circuit with active recovery switch Jan. 3, 1995
5270510 Microwave oven Dec. 14, 1993
5260861 Digital controlled converter and method Nov. 9, 1993
5157574 Overvoltage protector for rectifier/inverter bridges Oct. 20, 1992
5127085 Ride-through protection circuit for a voltage source inverter traction motor drive Jun. 30, 1992
5070426 Clipper circuit for power transistor circuit and inverter circuit utilizing the same Dec. 3, 1991
5063338 Power module for electronic control of a DC motor Nov. 5, 1991
5051730 Circuit arrangement for charging rectifiers for DC energy storage devices in telecommunications systems, particularly telephone switching systems Sep. 24, 1991
5038244 Device for overvoltage protection of a rectifier bridge feeding a d.c. motor and for control of the d.c. motor during emergency braking Aug. 6, 1991
4985820 Driver circuit for switching on lamp with low cold resistance Jan. 15, 1991
4965692 Overload detector and protection circuit Oct. 23, 1990
4930062 Computer power supply with optically isolated shutdown circuits May. 29, 1990
4916598 Apparatus for discerning faulty switching device Apr. 10, 1990
4914355 D.C. voltage supply circuit for fluorescent lamps Apr. 3, 1990
4888461 High-frequency heating apparatus Dec. 19, 1989
4849873 Active snubber for an inverter Jul. 18, 1989
4843533 Transient ride-through AC inverter Jun. 27, 1989
RE32953 Electronic fluorescent lamp ballast with overload protection Jun. 13, 1989
4839786 DC-DC converter Jun. 13, 1989
4680692 Control apparatus of AC/DC power converter Jul. 14, 1987
4634932 Lighting system Jan. 6, 1987
4617621 Inverters with reduced distributed inductance Oct. 14, 1986
4616158 Arrangement for shutting off an inverter Oct. 7, 1986
4613933 Digital drive system for pulse width modulated power control Sep. 23, 1986
4595861 Power supplies for electroluminescent panels Jun. 17, 1986
4566051 Inverter protected in respect of the rates of increase of current and voltage Jan. 21, 1986
4554487 Electronic fluorescent lamp ballast with overload protection Nov. 19, 1985

1 2 3 4

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