WO2007117449A2 - Polyphase power conditioning circuits - Google Patents
Polyphase power conditioning circuits Download PDFInfo
- Publication number
- WO2007117449A2 WO2007117449A2 PCT/US2007/008286 US2007008286W WO2007117449A2 WO 2007117449 A2 WO2007117449 A2 WO 2007117449A2 US 2007008286 W US2007008286 W US 2007008286W WO 2007117449 A2 WO2007117449 A2 WO 2007117449A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power
- inductors
- conditioning circuit
- neutral
- conductors
- Prior art date
Links
- 230000003750 conditioning effect Effects 0.000 title claims abstract description 42
- 239000004020 conductor Substances 0.000 claims abstract description 58
- 230000007935 neutral effect Effects 0.000 claims abstract description 43
- 229910044991 metal oxide Inorganic materials 0.000 claims description 15
- 150000004706 metal oxides Chemical class 0.000 claims description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
-
- H—ELECTRICITY
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- H—ELECTRICITY
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
Definitions
- the present application relates generally to power conditioning circuits and methods, and more particularly, to power conditioning circuits and methods that protect attached polyphase load equipment from voltage and current surges due to, for example, lightning strikes or other power disturbances.
- Power conditioning circuits have long been used to protect sensitive load equipment from transients caused by lightning strikes, noise and other power line disturbances.
- filter elements are used in the line and neutral conductors which trap and/or shunt unwanted power frequencies away from the load. See, for example, Speet et al. U.S. Pat. No. 4,814,941 and Taylor et al. U.S. Pat. No. 5,490,030.
- Muelleman U.S. Pat. No. 5,448,443 discloses a power conditioning device and method including an isolation transformer having primary and secondary sides and a ground impedance connected between the secondary side of the isolation transformer at a safety ground and an earth ground.
- the Muelleman device prevents ground current loops by redirecting transient ground currents to neutral, but does not provide current limiting or noise suppression.
- the power conditioning circuit includes first through third impedances coupled to the line, neutral and ground conductors, respectively, and to output lines wherein each of the impedances prevents power at frequencies greater than the nominal frequency from reaching the output lines.
- the first through third impedances comprise first through third inductors coupled in series with the line, neutral and ground conductors, respectively, between the power source and the output lines.
- Means may also be provided for limiting voltages across the line, neutral and ground conductors.
- the limiting means may comprise at least one metal oxide varistor or at least one zener diode.
- the power conditioning circuit is simple in design, yet effective to limit damaging transients.
- a polyphase power conditioning circuit for conditioning power supplied by a polyphase power source at a nominal frequency over line, neutral and ground conductors for each of a number of phases includes first, second and third impedances coupled to the line, neutral and ground conductors, respectively, for each phase and to output lines for each phase. Each of the impedances prevents power at frequencies greater than the nominal frequency from reaching the output lines.
- the present power conditioning circuit traps unwanted frequencies and/or shunts such frequency components between the line, neutral and ground conductors of each of a plurality of phases so that such frequencies are diverted away from sensitive load equipment to prevent damage thereto.
- FIG. 1 comprises a schematic diagram of a first embodiment of a polyphase power conditioning circuit
- FIG. IA comprises a schematic diagram of a second embodiment of a polyphase power conditioning circuit
- FIGS. 2A and 2B are schematic diagrams of alternative embodiments of a polyphase power conditioning circuit.
- a power conditioning circuit 20 is connected between polyphase line, neutral and ground conductors 22A-22C, 24A-24C, and 26A-26C and output lines 28A-28C, 30A-30C, and 32A-32C.
- the line, neutral and ground conductors 22A-22C, 24A-24C, and 26A-26C may be connected to a commercial source of power 33 or any other power source.
- the output lines 28A-28C, 30A-30C, and 32A-32C may be connected to one or more polyphase loads 34 in either delta or wye (star) configurations.
- the power source 33 and load(s) 34 are shown as being three-phase, it should be understood that the power source and load(s) may have any number of phases more than one.
- the power conditioning circuit 20 further includes, for each phase, first, second and third inductors Ll, L2 and L3 connected in series between the line, neutral and ground conductors 22, 24 and 26 and the output lines 28, 30 and 32 for that phase. More particularly, a first inductor Ll A is connected in series between the line conductor 22 A and the output line 28 A whereas inductors LIB and LlC are connected in series between the neutral conductor 24A and the output line 3OA and between the ground conductor 26A and the output line 32A. Inductors L2A, L2B, and L2C are respectively connected in series between the line conductor 22B and the output line 28B, between the neutral conductor 24B and the output line 3OB, and between the ground conductor 26B and the output line 32B.
- inductors L3A, L3B, and L3C are respectively connected in series between the line conductor 22C and the output line 28C, between the neutral conductor 24C and the output line 30C, and between the ground conductor 26C and the output line 32C.
- First through third metal oxide varistors MOVl, M0V2, and MOV3 are preferably connected across the line and neutral conductors 22, 24, the line and ground conductors 22, 26 and the neutral and ground conductors 24, 26, respectively, - for each phase.
- metal oxide varistors MOVl-I, MOV1-2, and MOVl -3 are connected across the line, neutral and ground conductors 22 A, 24A, and 26A, respectively of phase A.
- metal oxide varistors MOV2-1, MOV2-2, and MOV2-3 are connected across the line, neutral and ground conductors 22B, 24B, and 26B, respectively of phase B while metal oxide varistors MOV3-1, MOV3-2, and MOV3-3 are connected across the line, neutral and ground conductors 22C, 24C, and 26C, respectively of phase C.
- crowbar circuits 40A-40C may be coupled between the neutral and ground output lines 3OA and 32A, 3OB and 32B, and 30C and 32C, respectively.
- the crowbar circuits 40A-40C may be identical to one another and hence only the crowbar circuit 4OA will be described in detail, it being understood that the reference numerals and designations for phases B and C differ only in the use of "B" or "C" as a suffix for each element.
- the crowbar circuit 4OA includes a pair of cross-connected SCR' s, triacs, or other controllable switches QlA and Q2A coupled across the neutral and ground output lines 30A and 32A, and a biasing circuit 42A and 44A associated with the switches QlA and Q2A, respectively.
- the biasing circuit 42A includes a zener diode DlA and a resistor Rl A whereas the biasing circuit 44A comprises a series connection of a zener diode D2A and a resistor R2A
- capacitors and/or silicon avalanche diodes may be coupled between conductors on the power supply side and/or the load side. These elements (or any other additional circuit elements) may be substituted for or used in addition with any of the circuit elements described above.
- metal oxide varistors MOV 1-4, 1-5, 1-6, 2-4, 2-5, 2-6, 3-4, 3-5, and 3-6 may be coupled across the output lines 28A- 28C, 30A-30C, and 32A-32C in the fashion shown in FIG. IA.
- Alternatively a like number of silicon avalanche diodes may be coupled across the lines 28, 30. and 32 as shown in FIG. IA, if desired.
- the inductance values of all of the inductors L1-L3 are equal.
- all of the metal oxide varistors MOVl and MOV2 must be sized large enough to dissipate large voltage spikes caused, for example, by a lightning strike and should, for example, typically have clamping voltages on the order of 330-400 volts, although substantially lower clamping voltage ratings may be employed in certain cases.
- transients appearing on any of the line, neutral and ground conductors 22, 24 and 26 of any of the phases A, B, or C having one or more frequency components in excess of the nominal (typically 60 Hz) frequency of the power supplied thereto are attenuated by the inductors L1-L3, which have an increasing impedance with frequency.
- the metal oxide varistors MOVl- MO V3 limit the voltage magnitudes appearing across the line, neutral and ground conductors 22-26 for each phase.
- the actual inductance values for the inductors L1-L3 may be selected so as to obtain the desired filtering characteristics on the lines 28-32.
- FIGS. 2A and 2B alternative circuits are disclosed that utilize fewer components.
- the embodiment of FIG. 2A is particularly useful for wye (star) polyphase connected loads, although the circuit could be used for delta connected loads, if desired (in the latter case, no connection would be made to the neutral and possibly the ground load lines).
- the embodiment of FIG. 2B is useful with delta connected loads.
- a polyphase power conditioning circuit 58 includes inductors L4-L6 connected in series between the phase A, phase B, and phase C input conductors 6OA, 6OB, and 6OC and output lines 62A, 62B, and 62C, respectively.
- Inductors L7 and L8 are connected in series between neutral and ground input conductors 66, 68 and neutral and ground output lines 70, 72, respectively.
- a pair of metal oxide varistors MOV4 and MOV5 are connected between the phase A and phase B input conductors, a metal oxide varistor MOV6 is connected between the phase C input conductor 6OC and the neutral input conductor 66, and a metal oxide varistor MOV7 is connected between the neutral and ground input conductors 66, 68, respectively.
- a polyphase power conditioning circuit 80 is identical to the circuit 58 of FIG. 2A, with the exception that there is no neutral input conductor 66 and the MOV 6 and the inductor L7 are omitted.
- the MOV 7 is connected between the phase C input conductor 6OC and the ground input conductor 68.
- crowbar circuits similar or identical to the crowbar circuits 40A-40C of FIG. 1 described above may be connected between any or all of the output lines 62A-62C, 70, and/or 72 in either of the circuits of FIGS. 2A and 2B.
- circuits of FIGS. 1, 2 A and/or 2B can be modified by omitting and/or substituting for one or more of the elements therefrom.
- one or more of the varistors MOVl -MO V7 of one or more of the phases may be omitted, as may one or more of the crowbar circuits 40A-40C.
- any or all of the circuit elements shown in the FIGS, of U. S. Patent No. 6,166,458 may be utilized in one or more of the phase interconnections between the power source and load(s), as desired.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07754755.2A EP2005551A4 (en) | 2006-03-31 | 2007-04-02 | Polyphase power conditioning circuits |
AU2007235535A AU2007235535B2 (en) | 2006-03-31 | 2007-04-02 | Polyphase power conditioning circuits |
CA002647813A CA2647813A1 (en) | 2006-03-31 | 2007-04-02 | Polyphase power conditioning circuits |
JP2009503089A JP2009533012A (en) | 2006-03-31 | 2007-04-02 | Multiphase power regulation circuit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US78832206P | 2006-03-31 | 2006-03-31 | |
US60/788,322 | 2006-03-31 |
Publications (4)
Publication Number | Publication Date |
---|---|
WO2007117449A2 true WO2007117449A2 (en) | 2007-10-18 |
WO2007117449A3 WO2007117449A3 (en) | 2008-04-24 |
WO2007117449A8 WO2007117449A8 (en) | 2008-12-11 |
WO2007117449A4 WO2007117449A4 (en) | 2009-02-12 |
Family
ID=38581577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2007/008286 WO2007117449A2 (en) | 2006-03-31 | 2007-04-02 | Polyphase power conditioning circuits |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2005551A4 (en) |
JP (1) | JP2009533012A (en) |
AU (1) | AU2007235535B2 (en) |
CA (1) | CA2647813A1 (en) |
WO (1) | WO2007117449A2 (en) |
ZA (1) | ZA200808425B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102904213A (en) * | 2012-10-24 | 2013-01-30 | 深圳市雷博斯科技有限公司 | Lightning protection structure for counterattack shunting of transformer |
EP2230741A3 (en) * | 2009-03-16 | 2015-01-07 | Leveler LLC | Power conditioning circuit utilizing high oersted rating inductors |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69626863T2 (en) * | 1995-12-13 | 2003-12-24 | Michael A V Ward | INDUCTIVE HIGH-ENERGY IGNITION SYSTEM WITH LOW SELF-INDUCTIVITY |
US6166458A (en) * | 1998-01-20 | 2000-12-26 | Leveler | Power conditioning circuit |
US6288917B1 (en) * | 1998-01-20 | 2001-09-11 | Leveler | Three stage power conditioning circuit |
JP2001016777A (en) * | 1999-07-01 | 2001-01-19 | Showa Aircraft Ind Co Ltd | Noise filter for heating cart |
US6624997B1 (en) * | 2000-08-04 | 2003-09-23 | Teal Electronics Corporation | Electrical power conditioner |
-
2007
- 2007-04-02 CA CA002647813A patent/CA2647813A1/en not_active Abandoned
- 2007-04-02 JP JP2009503089A patent/JP2009533012A/en active Pending
- 2007-04-02 AU AU2007235535A patent/AU2007235535B2/en not_active Ceased
- 2007-04-02 WO PCT/US2007/008286 patent/WO2007117449A2/en active Application Filing
- 2007-04-02 EP EP07754755.2A patent/EP2005551A4/en not_active Withdrawn
-
2008
- 2008-10-02 ZA ZA200808425A patent/ZA200808425B/en unknown
Non-Patent Citations (1)
Title |
---|
See references of EP2005551A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2230741A3 (en) * | 2009-03-16 | 2015-01-07 | Leveler LLC | Power conditioning circuit utilizing high oersted rating inductors |
CN102904213A (en) * | 2012-10-24 | 2013-01-30 | 深圳市雷博斯科技有限公司 | Lightning protection structure for counterattack shunting of transformer |
CN102904213B (en) * | 2012-10-24 | 2016-06-29 | 深圳市雷博斯科技有限公司 | A kind of lightning protection structure of transformator counterattack shunting |
Also Published As
Publication number | Publication date |
---|---|
WO2007117449A4 (en) | 2009-02-12 |
ZA200808425B (en) | 2009-06-24 |
EP2005551A2 (en) | 2008-12-24 |
CA2647813A1 (en) | 2007-10-18 |
WO2007117449A3 (en) | 2008-04-24 |
JP2009533012A (en) | 2009-09-10 |
WO2007117449A8 (en) | 2008-12-11 |
AU2007235535A1 (en) | 2007-10-18 |
EP2005551A4 (en) | 2014-04-30 |
AU2007235535B2 (en) | 2012-03-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RU2683956C1 (en) | Converting device and method for its protection against short circuit | |
US4563720A (en) | Hybrid AC line transient suppressor | |
CA2311137C (en) | A surge suppression network responsive to the rate of change of power disturbances | |
US7933108B2 (en) | Motor drive with low leakage surge protection | |
CA2511695C (en) | Surge protector with optional input transformer | |
US8027137B2 (en) | Power filter | |
US8531811B2 (en) | Clamping control circuit for hybrid surge protection devices | |
US20080246459A1 (en) | Common-Mode Surge Suppression | |
CA2318610C (en) | Power conditioning circuit | |
US6288917B1 (en) | Three stage power conditioning circuit | |
US10998718B2 (en) | Lightning and overvoltage protection device for data networks, telephony services, electroacoustic installations or bus systems | |
US10033347B2 (en) | DC/DC electrical configuration for operating over a large span of input voltages | |
US7446436B2 (en) | Waveform correction filters | |
AU2007235535B2 (en) | Polyphase power conditioning circuits | |
US20160322810A1 (en) | System and method for providing surge protection | |
EP0050966B1 (en) | Protection circuit for a power distribution system | |
US20060034031A1 (en) | Protector for over tensions of industrial and home networks | |
KR20150052446A (en) | Protection Circuit for Power Supply | |
KR100679354B1 (en) | High power surge protection system for having sine wave tracking circuit | |
Kularatna | Protection of Systems from Surges and Transients | |
KR200405788Y1 (en) | High power surge protection system for having sine wave tracking circuit | |
RU109931U1 (en) | COMBINED DEVICE FOR PROTECTING CONDENSER UNITS | |
Leong Bee Keoh et al. | Distribution Transformer Random Transient Suppression using Diode Bridge T-type LC Reactor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07754755 Country of ref document: EP Kind code of ref document: A2 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2647813 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009503089 Country of ref document: JP |
|
NENP | Non-entry into the national phase in: |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007754755 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007235535 Country of ref document: AU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 4377/KOLNP/2008 Country of ref document: IN |
|
ENP | Entry into the national phase in: |
Ref document number: 2007235535 Country of ref document: AU Date of ref document: 20070402 Kind code of ref document: A |