WO2004107550A1 - Temperature monitoring of parallel-connected inverter modules - Google Patents
Temperature monitoring of parallel-connected inverter modules Download PDFInfo
- Publication number
- WO2004107550A1 WO2004107550A1 PCT/FI2004/000321 FI2004000321W WO2004107550A1 WO 2004107550 A1 WO2004107550 A1 WO 2004107550A1 FI 2004000321 W FI2004000321 W FI 2004000321W WO 2004107550 A1 WO2004107550 A1 WO 2004107550A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- parallel
- temperature
- inverter
- modules
- temperatures
- Prior art date
Links
Classifications
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/493—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1203—Circuits independent of the type of conversion
- H02H7/1206—Circuits independent of the type of conversion specially adapted to conversion cells composed of a plurality of parallel or serial connected elements
-
- 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 invention relates to a method in connection with parallel- connected inverter modules, disclosed in the preamble of claim 1, and to an arrangement in connection with parallel-connected inverter modules, disclosed in the preamble of claim 5.
- Inverters are used in frequency converters to generate a desired voltage or current to a load to be fed.
- a frequency converter typically receives its supply voltage from an AC network. This voltage is rectified in a rectifier unit and further converted to alternating voltage in the inverter to control the load in a desired manner.
- a conventional device fed from a frequency converter is a motor, which may be controlled in a reliable manner with the frequency converter using various control and adjustment principles.
- Parallel-connection of inverter modules is typically achieved by connecting the same output phase of each parallel-connected module to a common phase supply.
- the output phases of each inverter module are connected to the corresponding output phases of other inverter modules.
- the switching instructions of the frequency converter are generated in a unit common to ail the inverter modules, which unit then copies the instructions and sends them to each parallel-connected inverter module.
- the number of parallel-connected modules may be anything from two upwards.
- Inverter modules to be connected in parallel are typically fairly large and therefore placed in separate cabins. These cabins are cooled by blowing air into them to ensure proper operation and performance of the inverters.
- Today the temperatures of inverter output phases are measured for example directly from a power component of the output phase, or from the immediate vicinity thereof. The measured temperature is compared with a fixed temperature limit and thus, if the temperature rises above the limit, an overload possibly caused to the component is detected.
- Prior art component temperature control thus relies on a single temperature measurement, but with this measurement only an overload of the component in question can be concluded with certainty. Other elements having an essential impact on the temperature of the switching component are properly functioning cooling and control of the switch component. Comparing the measured temperature with the fixed temperature limit does not, however, produce clear indication or diagnostic data of such disturbances that may occur.
- the preferred embodiments of the invention are disclosed in the dependent claims.
- the invention is based on the idea that temperature control of parallel inverter modules is carried out by comparing the temperatures of the same output phases of parallel modules with one another.
- the method of the invention provides distinct advantages in fault diagnostics, because in addition to failure indications based, up to present, almost solely on an overload current, failures associated with cooling and with the operation of the control of the power component are now indicated.
- the failures relating cooling that the invention is capable of detecting include decreased circulation of cooling air, soiling of the cooling components in power semiconductors, and partial or complete breakdown of the cooling fan.
- the method enables to detect failures in control electronics, i.e. when one semiconductor component is controlled differently than others, and in power semiconductors, i.e. when a power semiconductor is not conducting or does so in an obscure manner.
- the Figure is a schematic example of parallel-connected three-phase inverter modules A, B, C. Although the Figure shows three inverter modules, their number is not restricted thereto, but a required number of parallel modules may be used. Likewise, the number of phases may vary depending on the purpose of use.
- Output phases Au, Av, Aw, Bu, Bv, Bw, Cu, Cv, Cw of inverter modules A, B, C are interconnected to produce output u, v, w for the load.
- the connection has been implemented by connecting the same phases Au, Bu, Cu; Av, Bv, Cv; Aw, Bw, Cw of each module A, B, C together.
- temperature T Au , T A , T A , T BU , T BV , T B , TCU, TCV, TCW of each output phase of each inverter module is determined. This may be carried out in a conventional manner by direct temperature measurement. Many currently used power semiconductors have a built-in temperature measurement element that allows the temperature to be obtained directly from the semiconductor of the component or from the vicinity thereof. It is also possible to measure temperature from a cooling plate. In addition, it is possible to determine the temperature of components indirectly by calculating it on the basis of the current passing through the component.
- each inverter module is compared with the temperatures of the same output phases of the other modules connected in parallel.
- temperature T Au of phase u of module A is thus compared with temperatures TB U , TC U of phase u of modules B, C.
- comparison means CM This is implemented as a cross-comparison between all the modules and, in accordance with the invention, carried out in comparison means CM.
- each inverter module is connected with the comparison means by a signal connection At, Bt, Ct, respectively.
- an alarm signal as is generated.
- this alarm signal is generated by alarm signal means AM. It is apparent that means CM and AM may be implemented in a single circuitry, although in the Figure these means are separated by a signal line si.
- each phase temperature is compared, in accordance with the embodiment, with the average obtained and if the output phase temperature of one of the inverter modules differs from the average of corresponding output phase temperatures more than allowed by a predetermined limit, an alarm signal is generated.
- the comparison is carried out by means CM configured for this purpose.
- phase temperatures are further compared with the calculated average of the phase temperatures.
- the method can be further simplified in accordance with the embodiment by select- ing the highest temperature among the temperatures of parallel modules in each phase and by comparing this maximum value with the calculated average.
- maximum temperature T u rnax of phase u is in this embodiment selected using equation
- T ⁇ mit is a predetermined ratio.
- the alarm signal of the invention is generated by the means for generating an alarm signal in response to a signal of the means CM in signal line si.
- the alarm signal as may contain all possible known preventive precautions that aim at reducing the risk of any major failures in the equipment. Such precautions may include an alarm raised to the operator, interruption of the control of the inverter module in question, and possibly a controlled shutdown of the system as a whole.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04734850.3A EP1537647B1 (en) | 2003-05-28 | 2004-05-26 | Temperature monitoring of parallel-connected inverter modules |
US11/043,188 US6999329B2 (en) | 2003-04-25 | 2005-01-27 | Temperature monitoring of parallel-connected inverter modules |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20030809 | 2003-05-28 | ||
FI20030809A FI115266B (en) | 2003-05-28 | 2003-05-28 | Method and arrangement for parallel inverter modules |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/043,188 Continuation US6999329B2 (en) | 2003-04-25 | 2005-01-27 | Temperature monitoring of parallel-connected inverter modules |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004107550A1 true WO2004107550A1 (en) | 2004-12-09 |
Family
ID=8566179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2004/000321 WO2004107550A1 (en) | 2003-04-25 | 2004-05-26 | Temperature monitoring of parallel-connected inverter modules |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1537647B1 (en) |
CN (1) | CN100472932C (en) |
FI (1) | FI115266B (en) |
WO (1) | WO2004107550A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2211454A1 (en) * | 2009-01-27 | 2010-07-28 | Abb Oy | Load balancing of parallel connected inverter modules |
WO2012163580A1 (en) * | 2011-06-01 | 2012-12-06 | Robert Bosch Gmbh | Method for the operation of an inverter, and inverter |
WO2014053273A1 (en) * | 2012-10-02 | 2014-04-10 | Wobben Properties Gmbh | Method for monitoring a plurality of electrical energy lines in a cable harness |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1973025B1 (en) | 2007-03-22 | 2009-11-25 | Baumüller Nürnberg Gmbh | Temperature control around power switches |
DE102019106257A1 (en) | 2019-03-12 | 2020-09-17 | Sma Solar Technology Ag | Battery inverter system |
CN110265974B (en) * | 2019-06-29 | 2021-04-16 | 潍柴动力股份有限公司 | Temperature detection method and device |
DE102021203038B4 (en) * | 2021-03-26 | 2023-06-01 | Siemens Aktiengesellschaft | Temperature monitoring for switchgear |
WO2022199956A1 (en) * | 2021-03-26 | 2022-09-29 | Siemens Aktiengesellschaft | Temperature monitoring for switching systems |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0444826A2 (en) | 1990-02-26 | 1991-09-04 | Fuji Electric Co. Ltd. | Protection circuit for a semiconductor device |
JPH07154976A (en) * | 1993-11-30 | 1995-06-16 | Fuji Electric Co Ltd | Operating method of inverter cooling fan |
JPH07194094A (en) * | 1993-12-28 | 1995-07-28 | Toyota Motor Corp | Temperature malfunction detector for switching element and switching element protector |
US5493154A (en) | 1993-04-21 | 1996-02-20 | Astec International, Ltd. | Temperature share scheme |
JPH1155934A (en) * | 1997-08-01 | 1999-02-26 | Toyota Autom Loom Works Ltd | Method of driving dc-ac inverter, and temperature protection circuit for dc-ac inverter |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5905645A (en) * | 1996-12-02 | 1999-05-18 | Astec International Limited | Thermally aided power sharing of power supplies with or without an external current share line |
-
2003
- 2003-05-28 FI FI20030809A patent/FI115266B/en active IP Right Grant
-
2004
- 2004-05-26 EP EP04734850.3A patent/EP1537647B1/en not_active Expired - Lifetime
- 2004-05-26 WO PCT/FI2004/000321 patent/WO2004107550A1/en active Application Filing
- 2004-05-26 CN CNB2004800005495A patent/CN100472932C/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0444826A2 (en) | 1990-02-26 | 1991-09-04 | Fuji Electric Co. Ltd. | Protection circuit for a semiconductor device |
US5493154A (en) | 1993-04-21 | 1996-02-20 | Astec International, Ltd. | Temperature share scheme |
JPH07154976A (en) * | 1993-11-30 | 1995-06-16 | Fuji Electric Co Ltd | Operating method of inverter cooling fan |
JPH07194094A (en) * | 1993-12-28 | 1995-07-28 | Toyota Motor Corp | Temperature malfunction detector for switching element and switching element protector |
JPH1155934A (en) * | 1997-08-01 | 1999-02-26 | Toyota Autom Loom Works Ltd | Method of driving dc-ac inverter, and temperature protection circuit for dc-ac inverter |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 09 31 October 1995 (1995-10-31) * |
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 10 30 November 1995 (1995-11-30) * |
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 05 31 May 1999 (1999-05-31) * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2211454A1 (en) * | 2009-01-27 | 2010-07-28 | Abb Oy | Load balancing of parallel connected inverter modules |
US8432714B2 (en) | 2009-01-27 | 2013-04-30 | Abb Oy | Load balancing of parallel connected inverter modules |
WO2012163580A1 (en) * | 2011-06-01 | 2012-12-06 | Robert Bosch Gmbh | Method for the operation of an inverter, and inverter |
US9190834B2 (en) | 2011-06-01 | 2015-11-17 | Robert Bosch Gmbh | Method for the operation of an inverter, and inverter |
WO2014053273A1 (en) * | 2012-10-02 | 2014-04-10 | Wobben Properties Gmbh | Method for monitoring a plurality of electrical energy lines in a cable harness |
AU2013327204B2 (en) * | 2012-10-02 | 2016-04-14 | Wobben Properties Gmbh | Method for monitoring a plurality of electrical energy lines in a cable harness |
RU2605081C2 (en) * | 2012-10-02 | 2016-12-20 | Воббен Пропертиз Гмбх | Method of inspecting multiple electric wires of bundle of wires |
US9823288B2 (en) | 2012-10-02 | 2017-11-21 | Wobben Properties Gmbh | Method for monitoring multiple electrical energy lines in a cable strand |
Also Published As
Publication number | Publication date |
---|---|
EP1537647B1 (en) | 2017-07-05 |
FI115266B (en) | 2005-03-31 |
CN1698258A (en) | 2005-11-16 |
FI20030809A0 (en) | 2003-05-28 |
CN100472932C (en) | 2009-03-25 |
FI20030809A (en) | 2004-11-29 |
EP1537647A1 (en) | 2005-06-08 |
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