| ReturnTo Theme-Group-Choice | Onelevelup |
| 5H571 | Control of direct current (DC) motors | |
| H02P7/00 ;7/03-7/347 | ||
| H02P7/00;H02P7/03-7/347 | AA | AA00 APPLICATIONS |
AA01 | AA02 | AA03 | AA04 | AA05 | AA06 | AA07 | AA08 | AA09 | AA10 |
| . Electric rolling stock | . Electric automobiles | . Electric parts of automobiles | . Take-up | . Rolling machines (e.g., iron and steel) | . Paper-making machines or printing machines | . Pumps (i.e., water and sewers) | . Cargo-handling equipment (e.g., cranes, conveyors or cable winches) | . Elevators or escalators | . Blowers | |||
| AA11 | AA12 | AA13 | AA14 | AA20 | ||||||||
| . Compressors (e.g., air conditioning) | . Recording and reproducing devices (e.g., video tape recorders, compact disk players, or laser disk players) | . Copiers | . Machine tools, manufacturing machinery, or robots | . Others | ||||||||
| BB | BB00 PURPOSE |
BB01 | BB02 | BB03 | BB04 | BB05 | BB06 | BB07 | BB08 | BB09 | BB10 | |
| . Power factor or reactive power | . Efficiency improvement or energy savings | . Miniaturization | . Noise or vibration reduction (i.e., including torque ripple) | . Electrical noise reduction | . High responsiveness | . High reliability | . Maintenance or testing | . Improvement of characteristics | . Others | |||
| CC | CC00 POWER SOURCES |
CC01 | CC02 | CC03 | CC04 | CC05 | CC06 | CC08 | CC09 | |||
| . Use of directcurrent (DC) power sources | . . Use of cells | . . . Use of solar cells | . . . Use of secondary cells | . Use of alternating current (AC) power sources | . Use of generators | . Use of multiple power sources | . . Power sources that are switched | |||||
| DD | DD00 TYPES OF DIRECT CURRENT (DC) MOTORS |
DD01 | DD02 | DD03 | DD04 | DD10 | ||||||
| . Separately excited DC motors | . DC shunt motors | . DC series-wound motors | . DC compound-wound motors | . Others | ||||||||
| EE | EE00 MOTOR OPERATING METHODS |
EE01 | EE02 | EE03 | EE04 | EE05 | EE06 | EE07 | EE08 | EE09 | EE10 | |
| . Variants that operate intermittently | . Variants that operate forward and backward | . Variants that operate according to load | . Pitch control | . Variants that operate avoiding resonance frequencies | . Special operating modes when abnormalities occur | . Variants that perform inching operations | . Weak-field-system control | . Operating modes that are switched | . Others | |||
| FF | FF00 MAIN AREAS OF CONTROL |
FF01 | FF02 | FF03 | FF04 | FF05 | FF06 | FF07 | FF08 | FF09 | FF10 | |
| . Starting or accelerating | . Deceleration or braking | . . Dynamic braking | . . Regenerative braking | . . Reversal braking | . Stopping | . Low speeds | . High speeds | . Switching the direction of rotation | . Others | |||
| GG | GG00 CONTROL SYSTEMS |
GG01 | GG02 | GG03 | GG04 | GG05 | GG06 | GG07 | GG08 | GG10 | ||
| . Position feedback | . Velocity feedback | . . Feedback of sensed load values | . Variants that feed back current | . Variants that feed back voltage | . Phase control (e.g., phase-locked loop control) | . Control systems that are switched | . Adjustment of loop gain | . Others | ||||
| HA | HA00 PRINCIPAL CONSTITUENT ELEMENTS OF DRIVE CONTROL CIRCUITS OR POWER CONVERSION CIRCUITS |
HA01 | HA02 | HA03 | HA04 | HA07 | HA08 | HA09 | HA10 | |||
| . Resistors | . Reactors | . Transformers | . Relays or switches | . Semiconductor elements | . . Transistors | . . . Field-effect transistors (FET) | . . . Insulating gate bipolar transistors (IGBT) | |||||
| HA11 | HA12 | HA13 | HA14 | HA15 | HA16 | HA18 | HA20 | |||||
| . . Thyristors | . . . Static induction thyristors | . . . Gate turn-off thyristors (GTO) | . . . Triode alternating current switches (TRIAC) | . . . Reverse conducting thyristors | . . Diodes | . . Integrated drive circuits | . Other elements | |||||
| HB | HB00 LOCATIONS WHERE DRIVE CONTROL CIRCUITS OR POWER CONVERSION CIRCUITS ARE CONNECTED |
HB01 | HB02 | HB03 | HB04 | HB05 | HB10 | |||||
| . Variants that are connected in series to motors | . Variants that are connected in series to shunt field system windings | . Variants that are connected in series to armature windings by shunt motors | . Variants that are connected in series to separately excited field system windings | . Variants that are connected in parallel to field system windings | . Others | |||||||
| HC | HC00 POWER TRANSDUCER CONNECTION MODES |
HC01 | HC02 | HC03 | HC10 | |||||||
| . Parallel power transducer connections | . Serial power transducer connections | . Power transducer connection switching | . Others | |||||||||
| HD | HD00 MOTOR CONTROL MEANS |
HD01 | HD02 | HD03 | HD04 | HD05 | HD06 | HD07 | HD08 | HD09 | HD10 | |
| . Control of service voltage | . . Chopper control | . . Use of stationary transducers | . . . Transforming from single-phase AC to DC | . . . Transforming from polyphase AC to DC | . . . Non-reversible Ward-Leonard systems | . . . Reversible Ward-Leonard systems | . Use of Ward-Leonard devices | . Use of Ilgner devices | . Others | |||
| JJ | JJ00 ARITHMETIC SECTION CONSTITUENT MEANS |
JJ01 | JJ02 | JJ03 | JJ04 | JJ06 | JJ07 | JJ08 | ||||
| . Use only of analog elements | . Inclusion of digital elements | . . Use of computers | . Variants that perform estimating or predictive operations, or simulation | . Sample-and-hold operations | . Variants that have elements with hysteresis characteristics | . Variants that have dead zones | ||||||
| JJ11 | JJ12 | JJ13 | JJ14 | JJ15 | JJ16 | JJ17 | JJ18 | JJ19 | JJ20 | |||
| . Arithmetic circuit elements | . . Sawtooth-wave-generating circuits (i.e., triangular- wave-generating circuits) | . . Counter circuits | . . Latch circuits | . . Frequency-to-voltage or voltage-to-frequency conversion circuits | . . Digital-to-analog or analog-to-digital conversion circuits | . . Memories | . . Timers | . . Multivibrators | . . Function-generating circuits | |||
| JJ22 | JJ23 | JJ24 | JJ25 | JJ26 | JJ27 | JJ28 | JJ29 | JJ30 | ||||
| . . Integrating circuits | . . Differentiation circuits | . . Proportional integrating circuits | . . Compensation circuits or correction circuit | . . Smoothing circuits (e.g., filter circuits) | . . Resonance circuits | . . Limit circuits (i.e., limiters) | . . Non-linear elements | . Others | ||||
| KK | KK00 SETTING SECTIONS |
KK01 | KK02 | KK04 | KK05 | KK06 | KK08 | KK10 | ||||
| . Variants that use analog signals | . . Variable resistors | . Variants that use digital signals | . . Use of computers | . . . Use of memories | . Use of pattern instructions | . Others | ||||||
| LL | LL00 SENSED VARIABLES AND SENSING MEANS |
LL01 | LL02 | LL03 | LL04 | LL05 | LL06 | LL07 | LL08 | LL09 | LL10 | |
| . Sensing velocity | . . Sensing by analog values | . . . Use of a tachometer generator | . . . Use of selsyns | . . . Use of Hall elements (i.e., analog) | . . Sensing by digital values | . . . Use of pulse encoders | . . . . Optical variants | . . . . Magnetic variants | . . . Use of Hall elements (i.e., digital) | |||
| LL12 | LL13 | LL14 | LL15 | LL16 | LL17 | LL20 | ||||||
| . . Sensing of velocity without using velocity sensors | . . . Use of sensing electrical variables | . . . . Use of current sensing | . . . . Use of voltage sensing | . . . . Use of counter-voltage detection | . . . . . Resistance bridge circuits that include an armature on one side | . . Use of multiple velocity sensing means | ||||||
| LL21 | LL22 | LL23 | LL24 | LL25 | LL27 | LL28 | LL29 | LL30 | ||||
| . Sensing of electrical variables | . . Current | . . Voltage | . . Counter-voltage | . . Power factors | . Sensing of magnetic variables (e.g., magnetic flux or magnetic fields) | . Direction of rotation | . Torque | . Phase | ||||
| LL31 | LL32 | LL33 | LL34 | LL35 | LL36 | LL37 | LL38 | LL39 | LL40 | |||
| . Position | . . Position of rotors | . . Position of controlled items | . Temperature | . . Temperature of control sections | . . Temperature of motor sections | . Tension | . Pressure | . Amount of take-up | . Vibration | |||
| LL41 | LL42 | LL43 | LL44 | LL45 | LL46 | LL48 | LL50 | |||||
| . Load | . Synchronization | . Abnormalities | . . Abnormalities of control sections | . . Abnormalities of motor sections | . . Abnormalities of sensing sections | . Resolvers | . Others | |||||
| MM | MM00 PROTECTION, COMPENSATION, MONITORING, AND INDICATION |
MM01 | MM02 | MM03 | MM04 | MM05 | MM06 | MM08 | MM09 | MM10 | ||
| . Protection | . . Overcurrent | . . Overvoltage | . . Overload | . . Excessive velocity or lowered velocity | . . Overheating | . Monitoring or indication | . Sparking | . Demagnetization | ||||
| MM11 | MM12 | MM13 | MM14 | MM16 | MM17 | MM18 | MM20 | |||||
| . Back-ups (i.e., including providing redundancy) | . Temperature compensation | . Momentary power outages | . Source voltage fluctuation | . Sensing error compensation | . . Variants that use shaft eccentricity or shaft torsion | . . Variants that use rotation sensors | . Others | |||||
| PP | PP00 OTHER CONFIGURATIONS |
PP01 | PP02 | PP03 | PP04 | PP05 | PP10 | |||||
| . Motor and load transmission apparatuses (e.g., clutches or gears) | . Controller wiring, arrangement, or installation | . Use of separate brakes | . Use of photocouplers | . Use of smoothing circuits for main circuits | . Others |