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F-Term-List

5H740 POWER CONVERSION IN GENERAL
H02M1/00 -1/44
H02M1/00-1/44 AA AA00
PURPOSE 		AA01 AA02 AA03 AA04 AA05 AA06 AA08 AA09 AA10
. Measures for fluctuation of the source voltage . Measures for fluctuation of the source frequency . Measures for fluctuation of the load . Prevention of firing errors for the switching element . Reduction of the time that switching elements are on or off . Effective use of stored energy . Indication or monitoring . . Indication of operation . . Indication of failure
BA BA00
MAIN CIRCUIT-SWITCHING ELEMENTS 		BA01 BA02 BA03 BA04 BA05 BA06 BA07 BA08 BA09
. Thyristors . . Gate turn-off (GTO) thyristors . . Two-way three-terminal thyristors (TRIAC) . . Photo-thyristors (light-activated silicon-controlled rectifiers (LASCR)) . . Multi-gate thyristors . . Reverse thyristors . . Static induction thyristors (FCT, SITH) . . Heat-sensitive thyristors . . Two-terminal thyristors (SSS)
BA11 BA12 BA13 BA15 BA16 BA18
. Transistors . . Field-effect transistors (FET) . . Multi-emitter transistors . Combination of different types of elements . Use of auxiliary switching elements . Others
BB BB00
CONNECTION OF MAIN CIRCUIT-SWITCHING ELEMENTS AND LOAD STATUS 		BB01 BB02 BB03 BB04 BB05 BB06 BB07 BB08 BB09 BB10
. Serial connection . Parallel connection . Reverse-parallel connection . Serial-parallel connection . Bridge connection . Others . Direct current (DC) loads . Alternating current (AC) loads . . Multi-phase loads (three-phase loads) . Inductive loads
BC BC00
CONTROL MODES FOR MAIN CIRCUIT-SWITCHING ELEMENTS 		BC01 BC02 BC04 BC05 BC06 BC07 BC08 BC10
. Turn-on . Turn-off . Zero-point switches . . Cyclic control . Phase control . . Switching on at the leading edge of a half-cycle . . Switching on and off at the leading and trailing edges of half-cycles . Soft starting
GG GG00
GENERATION OF SYNCHRONOUS SIGNALS 		GG01 GG02 GG03 GG04 GG05 GG06 GG08
. Waveforms of synchronous signal . . Zero-point pulses . . Sine waves . . Rectangular waves . . Triangular waves (saw tooth waves) . . Angular phase shift (90 degree phase shift) . PLL circuits
HH HH00
POWER SOURCES FOR MAIN CIRCUIT-SWITCHING ELEMENT CONTROL CIRCUITS 		HH01 HH03 HH05 HH06 HH07
. Input power sources . Power obtained from both ends of the main circuit-switching elements . Power obtained from separate power sources . . Use of two power sources (i.e., for power-on and power-off) . . Use of one power source for both power-on and power-off
JA JA00
FIRING CONTROL 		JA01 JA03 JA04 JA05 JA06 JA07 JA08 JA09
. Turn-on circuits . Phase control circuits . . Control input (command) circuits . . Use of control relays (CR) only . . Use of unijunction transistors (UJT) . . Use of programmable unijunction transistors (PUT) . . Use of two-terminal elements . . Use of sensing elements
JA11 JA12 JA13 JA14 JA16 JA17 JA18 JA19 JA20
. . Use of triangular waves . . . Triangular waves with a variable slope . . . Circuits for generating triangular waves . . . . Use of integrators . . Changing of the characteristics of the firing angle . . . Limitation of the firing angle . . . Provision of cosine or arc-cosine characteristics . . Waveform of the firing pulse . . . Wide pulses
JA21 JA22 JA23 JA25 JA26 JA27 JA28 JA29
. . . Pulse strings . . . High gate pulses . . . Adjustment of the pulse waveform . . Digital phase-control circuits . . . Use of counter overflow pulses . . . Use of control command registers . . . Obtaining of pulses by calculations carried out by CPU . . . Storage of signals in ROM and RAM
JB JB00
CONTROL OF ARC-EXTINGUISHING 		JB01 JB02 JB03 JB04 JB05 JB06 JB07 JB08 JB09 JB10
. Turn-off circuits . . Application of an inverse bias onto the gates . . . Bias that is inversely proportional to the main current . . . . Use of capacitors . . Use of auxiliary capacitors . Commutating circuits . . Use of commutating capacitors . . Use of commutating reactors . . Use of separate power sources . . Use of commutating bypass circuits
KK KK00
TRANSMISSION OF CONTROL SIGNALS TO THE MAIN CIRCUIT-SWITCHING ELEMENTS 		KK01 KK03 KK04 KK05 KK06 KK07 KK08 KK10
. Direct driving . Use of pulse transformers . Use of light . . Use of optical fibers . . Use of mirrors . . Gate light-emission circuits that are redundant . . Use of light for input of control . Others
LL LL00
CIRCUITS IN SECTIONS G AND K 		LL01 LL02 LL03 LL05
. Resistors (i.e., for dv/dt) . Capacitors (for eliminating noise) . Diodes (such as constant voltage elements) . Means for short-circuiting between G and K
MM MM00
PROTECTION 		MM01 MM02 MM03 MM04 MM05 MM06 MM08 MM10
. Sensing or protection related to voltage . . Sensing forward or reverse voltage in switching elements . . Snubber circuits . . . Having auxiliary snubber circuits . . Inverse voltage protection . . Voltage allocation . Protection related to temperature or heat . Reduction of the wiring inductance
MM11 MM12 MM13 MM14 MM15 MM16 MM17 MM18
. Detection or protection related to voltage . . Suppression of rush current or over-current . . . Use of timers . . . Correspondence to output . . . Use of nonlinear elements . . . Use of reactance . . Use of anode reactors . . Current balance
NN NN00
PERIPHERAL DEVICES 		NN01 NN02 NN03 NN05 NN06 NN07 NN08
. Elimination of harmonics . . Use of harmonic filters . . Use of active filters . Elimination of ripple . . Use of smoothing circuits . . Use of constant-voltage circuits . . Use of active filters
NN11 NN12 NN13 NN14 NN15 NN16 NN17 NN18
. Devices for accommodation of different power sources . . AC-DC adapters . . . Plug-in adapters . . Devices that are used for both AC and DC . . . Use of switches . . . . Use of switch-jacks . . . Devices with inverters . . . Devices with rectifying circuits
PP PP00
STRUCTURES 		PP01 PP02 PP03 PP04 PP05 PP06 PP07 PP08 PP09 PP10
. Switching element mounting structures . Arrangements of switching elements or parts . Wiring structures . . Connectors (including terminals) . Cooling structures . . Structures with fins for cooling . Housings (cabinets) . Light-guide structures . . Light-guide mounting structures . Reactor or transformer structures
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