EP3111540A1 - Frequency converter - Google Patents
Frequency converterInfo
- Publication number
- EP3111540A1 EP3111540A1 EP15709134.9A EP15709134A EP3111540A1 EP 3111540 A1 EP3111540 A1 EP 3111540A1 EP 15709134 A EP15709134 A EP 15709134A EP 3111540 A1 EP3111540 A1 EP 3111540A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- output voltage
- frequency converter
- frequency
- converter output
- converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 239000003990 capacitor Substances 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 7
- 230000010355 oscillation Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- 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
- H02M7/53—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 using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/04—Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for damping motor oscillations, e.g. for reducing hunting
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- 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 has for its object to provide a frequency converter with high efficiency available.
- the invention solves this problem by a frequency converter according to claim 1.
- the frequency converter is designed to generate at least one drive voltage or frequency converter output voltage which serves to drive an electric motor.
- the at least one frequency converter output voltage is typically an AC voltage.
- the frequency converter output voltage may be a phase voltage of an electric motor.
- the at least one frequency converter output voltage has an adjustable frequency converter output voltage amplitude and an adjustable frequency converter output voltage frequency.
- the frequency converter output voltage frequency determines, for example, a rotational frequency of a resulting magnetic field and thus a rotational speed of the electric motor, wherein the frequency converter output voltage amplitude determines, for example, the torque caused by the electric motor.
- the frequency converter further comprises a clocked inverter with a number of controllable switching means, which may for example be part of a bridge circuit (for example, a three-phase transistor bridge).
- the inverter is connected to the DC voltage converter output voltage is applied and is adapted to control its switching means regardless of the predetermined frequency converter output voltage amplitude with a respective inverter switching frequency such that generated from the DC voltage converter output voltage, the at least one frequency converter output voltage with the predetermined frequency converter output voltage frequency becomes.
- the inverter switching frequency i. the switching frequency of a respective switching means of the inverter, may correspond to the frequency converter output voltage frequency, i. the inverter switching frequency and the frequency converter output voltage frequency may be identical, i.
- the inverter is operated in basic cycle clocking or block clocking.
- the DC-DC converter may be configured to generate the DC-DC converter output voltage level as a function of the predefinable frequency converter output voltage amplitude and in addition in dependence on a pilot signal or modulation signal.
- the frequency converter or a control unit of the frequency converter which controls, for example, the operation of the frequency converter and generates associated drive signals for all the components to be controlled, can also be designed to generate the pilot or modulation signal, and in particular to generate such that a torque ripple is minimized.
- the pilot or modulating signal may be, for example, a sinusoidal or a rectified sinusoidal signal having a frequency that is a multiple, for example, three to six times, the frequency converter output voltage frequency.
- An amplitude of the pilot or modulation signal may depend, for example, on the frequency converter output voltage amplitude and / or on the frequency converter output voltage frequency.
- the precontrol or modulation signal in particular the amplitude and / or the frequency of the precontrol or modulation signal, can be further generated as a function of the following variables:
- the frequency converter may have suitable sensors for detecting the above sizes.
- the DC-DC converter can be designed, for example, to generate the DC voltage converter output voltage level as a function of the predefinable or predetermined frequency converter output voltage amplitude and additionally in dependence on the pilot signal or modulation signal such that the DC voltage converter Output voltage level corresponds to a sum or a difference of the predetermined frequency inverter output voltage amplitude and the pilot or modulation signal.
- the precontrol or modulation signal By means of the precontrol or modulation signal, the increased torque ripple caused by the fundamental oscillation clocking or block timing can be reduced or eliminated at low speeds by precontrol of the DC adjuster.
- the frequency converter may have a polyphase rectifier for generating the input DC voltage.
- Fig. 2 shows a frequency converter according to another embodiment
- FIG. 3 shows a phase current and a phase voltage of an electric motor controlled by means of the frequency converter from FIGS. 1 and 2 with and without modulation of an output level of a DC-DC converter output voltage of a DC-DC converter of the frequency converter from FIGS. 1 and 2.
- the frequency converter 1 shows a frequency converter 1 for generating frequency converter output voltages S1, S2, S3, which are applied to associated phase windings of a conventional three-phase electric motor 2.
- the frequency converter output voltages S1, S2, S3 have an adjustable frequency converter output voltage amplitude AA and an adjustable frequency converter output voltage frequency AF (see FIG. 3).
- the frequency converter 1 conventionally comprises a three-phase rectifier 6 for generating a DC input voltage UE from a three-phase AC line voltage. Downstream of the rectifier 6 is a clocked DC-DC converter or converter 3 in the form of a buck converter, which is adapted to generate from the input DC voltage UE a DC-DC converter output voltage UA buffered by means of a capacitor 15 with a lower level compared to the input DC voltage UE.
- the DC-DC converter 3 has two capacitors 7 and 8, which are connected in series between the input DC voltage UE.
- a diode 16 is connected in series with another of the controllable switching means 5, which is not part of a half-bridge, between the DC voltage converter output voltage UA and is conventionally used to drive a brake chopper resistor 17.
- the control of the associated switching means 5 of the brake chopper Resistor 17 is dependent on the level of the DC-DC converter output voltage UA.
- a hysteresis controller which switches on when an upper limit level is exceeded and switches it off again when it falls below a lower limit level.
- All switching means 5, 9 and 10 are controlled by a control unit, not explicitly shown, which controls the operation of the frequency converter 1 and which may be, for example, a microprocessor or a digital signal processor.
- 3 shows a phase current IP and a phase voltage UP of a phase winding of the electric motor 2 driven by the frequency converter from FIGS. 1 and 2 without modulation (illustration on the left) and with modulation (representation on the right) of the output level of the DC voltage converter output voltage UA.
- the phase voltage UP corresponds (ideally) to one of the frequency converter output voltages S1, S2 or S3, in the present case exemplarily the frequency converter output voltage S1.
- the two remaining phase voltages have a (idealized) course identical except for a phase shift.
- the illustration on the left shows that the inverter 4 is operated in basic oscillation or block timing.
- the switches 5 of the inverter 3 are clocked at the fundamental frequency AF of the frequency converter output voltage S1 or UP, ie an inverter switching frequency with which the switches 5 are driven corresponds to the frequency converter output voltage frequency AF.
- the inverter 4 sets only the frequency AF of the frequency converter output voltage S1 or UP, but not the frequency converter output voltage amplitude AA.
- the frequency converter output voltage amplitude AA is (idealized) identical to the level of the DC voltage converter output voltage UA.
- a DC converter (step-down converter) 3 is inserted between the voltage intermediate circuit and the three-phase transistor bridge 4.
- the three-phase transistor bridge 4 can be clocked with the fundamental, for example in a frequency range between 0 Hz to 1 kHz. Due to the low inverter switching frequency of the inverter switch 5 can be optimized for the forward losses and the switching losses are subordinate.
- the DC-DC converter 3 takes over the amplitude position, clocks high-frequency, for example in a frequency range between 50 kHz and 200 kHz, and can thus be optimized for the switching losses.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014203781.6A DE102014203781A1 (en) | 2014-02-28 | 2014-02-28 | frequency converter |
PCT/EP2015/054166 WO2015128477A1 (en) | 2014-02-28 | 2015-02-27 | Frequency converter |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3111540A1 true EP3111540A1 (en) | 2017-01-04 |
Family
ID=52649003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15709134.9A Ceased EP3111540A1 (en) | 2014-02-28 | 2015-02-27 | Frequency converter |
Country Status (5)
Country | Link |
---|---|
US (1) | US10432128B2 (en) |
EP (1) | EP3111540A1 (en) |
CN (1) | CN106464147B (en) |
DE (1) | DE102014203781A1 (en) |
WO (1) | WO2015128477A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111884564A (en) * | 2020-08-06 | 2020-11-03 | 深圳市海浦蒙特科技有限公司 | Frequency converter control method, frequency converter system and storage medium |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016182248A1 (en) | 2015-05-13 | 2016-11-17 | 서울바이오시스 주식회사 | Light-emitting element |
RU175512U1 (en) * | 2017-06-20 | 2017-12-07 | Федеральное государственное унитарное предприятие "Государственный научно-исследовательский институт авиационных систем" (ФГУП "ГосНИИАС") | Switching frequency converter with DC link |
DE102018212825A1 (en) * | 2018-08-01 | 2020-02-06 | Schmidhauser Ag | DC / DC converter and regenerative power unit |
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KR100966879B1 (en) * | 2003-01-08 | 2010-06-30 | 삼성전자주식회사 | Control apparatus and method for brushless dc motor |
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DE102005047373A1 (en) * | 2005-09-28 | 2007-04-05 | Schekulin, Dirk, Dr. Ing. | Low-setting plate circuit consists of input and output connections with main branches between them as well as input-side condenser and output-side diode series connections |
JP4389906B2 (en) * | 2006-06-29 | 2009-12-24 | パナソニック株式会社 | AC power source direct-coupled brushless DC motor and electrical equipment equipped with the same |
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2014
- 2014-02-28 DE DE102014203781.6A patent/DE102014203781A1/en active Pending
-
2015
- 2015-02-27 CN CN201580011145.4A patent/CN106464147B/en active Active
- 2015-02-27 US US15/121,792 patent/US10432128B2/en active Active
- 2015-02-27 WO PCT/EP2015/054166 patent/WO2015128477A1/en active Application Filing
- 2015-02-27 EP EP15709134.9A patent/EP3111540A1/en not_active Ceased
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WANG GANGYAO ET AL: "Performance comparison of 1200V 100A SiC MOSFET and 1200V 100A silicon IGBT", 2013 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION, IEEE, 15 September 2013 (2013-09-15), pages 3230 - 3234, XP032516148, DOI: 10.1109/ECCE.2013.6647124 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111884564A (en) * | 2020-08-06 | 2020-11-03 | 深圳市海浦蒙特科技有限公司 | Frequency converter control method, frequency converter system and storage medium |
CN111884564B (en) * | 2020-08-06 | 2022-02-18 | 深圳市海浦蒙特科技有限公司 | Frequency converter control method, frequency converter system and storage medium |
Also Published As
Publication number | Publication date |
---|---|
CN106464147B (en) | 2020-10-09 |
WO2015128477A1 (en) | 2015-09-03 |
US10432128B2 (en) | 2019-10-01 |
US20170012564A1 (en) | 2017-01-12 |
CN106464147A (en) | 2017-02-22 |
DE102014203781A1 (en) | 2015-09-03 |
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