EP4519970A1 - Mehrpunktumrichter mit mechanisch geschaltetem entladewiderstand und erdungsschalter - Google Patents
Mehrpunktumrichter mit mechanisch geschaltetem entladewiderstand und erdungsschalterInfo
- Publication number
- EP4519970A1 EP4519970A1 EP23726298.5A EP23726298A EP4519970A1 EP 4519970 A1 EP4519970 A1 EP 4519970A1 EP 23726298 A EP23726298 A EP 23726298A EP 4519970 A1 EP4519970 A1 EP 4519970A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- switch
- level converter
- capacitor
- cell
- 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.)
- Withdrawn
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
- H02M7/483—Converters with outputs that each can have more than two voltages levels
-
- 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
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
-
- 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
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
Definitions
- the invention relates to a multi-level converter.
- the object of the invention is to provide a multi-level converter that is easy to maintain and has a simple structure and can also be safely and repeatedly put into a voltage-free state.
- the invention proposes a multi-level converter, comprising: a capacitor; a resistance; a first switch operated by a first motor driver; a second switch operated by a second motor driver; wherein the first switch in a closed state connects the capacitor to the resistor and short-circuits it; the second switch in the closed state connects the capacitor to a ground potential; the first switch is closed before the second switch.
- the multi-level converter is designed to be particularly simple and cost-effective for disconnection, ie for discharging and grounding.
- the multi level converter then assumes a voltage-free state.
- the first and second switches have their own motor drives that can be controlled separately. After the capacitor is short-circuited by the first switch using a resistor or via the resistor, the capacitors are largely discharged.
- the second switch finally grounds the capacitor and ensures that the multi level converter is placed in a voltage-free state. When pressed, the switches are in a fixed order closed.
- the multi level converter can be designed in any way, wherein the first switch comprises a first and a second contact tooth; the first and second contact teeth are electrically connected to the resistor; the first contact tooth, the resistor and the second contact tooth form an electrical series connection.
- the contact teeth each have contact surfaces.
- the multi level converter can be designed in any way, with the second switch comprising a movable contact; the movable contact is electrically connected to the ground potential.
- the movable contact can be designed as a contact rail, which is electrically connected to the ground potential, for example via cable.
- the multi-level converter can be designed in any way, with a contact module being provided with a first switch-on contact and a second switch-on contact; the first switch-on contact has a first contact point and a second contact point; the second switch-on contact has a first contact point and a second contact point.
- the multi-level converter can be designed in any way, wherein in the closed state of the first switch the first contact tooth contacts the first contact point of the first switch-on contact and the second contact tooth contacts the first contact point of the second switch-on contact and in the closed state of the second switch the movable contact contacted the second contact point of the first switch-on contact and the second contact point of the second switch-on contact.
- the first switch is thus formed from the contact teeth and the first contact points of the first and second switch-on contacts.
- the second switch is thus made up of the movable contact and the second contact points of the first and second Switch-on contact formed.
- the contact rail contacts the first and second switching contacts.
- the multi-level converter can be designed in any way, with the capacitor being part of a cell.
- the multi level converter can be designed in any way, with multiple capacitors being provided which are part of a single cell; multiple cells are provided; each cell is assigned a first and a second switching contact; each cell can be discharged via two contact teeth and a resistor; each cell can be grounded via a common movable contact.
- a multi-level converter can have several capacitors that are arranged individually or together in cells.
- each of the cells must be designed to be connectable to the first and second switches.
- Each cell can be assigned a separate resistor or multiple resistors.
- Each cell is connected to a common second switch so that they can be connected to ground potential via the second switch.
- Each cell can be assigned its own first switch, through which the capacitors of the cells are discharged.
- the multi-level converter can be designed in any way, with twelve cells being provided and each cell emitting a voltage of 2kV.
- the multi-level converter can be designed in any way, with the multi-level converter operating in a medium voltage range of 20kV.
- the multi-level converter can be designed in any way, with each cell having at least one semiconductor switching element and one inductor.
- a method for unlocking a multi-level converter wherein in a first step the first switch is actuated by a first motor drive and thereby short-circuits a capacitor with a resistor; in a second step, the second switch is actuated by a second motor drive and thereby connects the capacitor to a ground potential; the second step is only carried out when the capacitor has been discharged.
- the capacitors When the multi-level converter is switched off, i.e. switched off without voltage, the capacitors are discharged and, after they have been discharged, the capacitors are additionally grounded. It is important here that grounding, i.e. the actuation of the second switch, only takes place when the capacitors have been completely or at least almost completely discharged. This makes it possible to work safely on the multi-level converter.
- Fig. 1 shows a circuit of a multi-level converter
- FIG. 3 shows a second detailed view of the multi-level converter with the first and second switches
- Fig. 4 is a detailed view of the first and second switches.
- Figure 1 shows a first embodiment of a multi-level converter 1.
- This has at least one capacitor 2, which is part of a cell 9.
- at least one resistor 3 is provided, which can be connected in parallel to or connected to the capacitor 2 with the aid of a first switch 4 and a first motor drive 40, whereby the capacitor 2 is short-circuited with or via the resistor 3.
- a second switch 5 is provided, which can connect the capacitor 2 to a ground potential 20 with the aid of a second motor drive 50.
- the capacitor 2 is short-circuited with or via the resistor 3
- the capacitor 2 is discharged.
- the capacitor 2 is connected to the ground potential 20, the capacitor 2 is discharged grounded. Short-circuiting always occurs before grounding.
- the multi-level converter 1 has a cell 9 with a capacitor 2.
- the multi-level converter 1 can preferably have twelve cells 9, each with at least one capacitor 2.
- FIGS 2 to 4 show a detailed representation of the multi-level converter 1, as well as the first and second switches 4, 5. All elements of the multi-level converter 1 are arranged in a housing 10 with a frame.
- the first switch 4 has at least a first contact tooth 4.1 and a second contact tooth 4.2.
- Each contact tooth consists of a carrier with a first and a second contact plate, the contact plates being arranged on two opposite sides of the carrier.
- Each of the contact teeth 4.1, 4.2 or the contact plates of each contact tooth is preferably electrically conductively connected to at least one resistor 3 via a first and a second line 6.1, 6.2.
- the contact teeth 4.1, 4.2 and the at least one resistor 3 form an electrical series connection via the lines 6.1, 6.2.
- the contact teeth 4.1, 4.2 are arranged on a safety strip 41.
- the switching edge 41 is made of a non-conductive material, so that the two contact teeth 4.1, 4.2 are insulated from one another, i.e. not electrically conductive.
- the switching edge 41 is preferably connected to the first motor drive 40 via a mechanism 42, which is designed, for example, as a toggle lever device.
- the first motor drive 40 is preferably designed as a linear motor with a rotating spindle.
- the second switch 5 has a movable contact 5.1, which is designed as a contact rail.
- the movable contact 5.1 or the rail is preferably connected to the ground potential 20 via a line (not shown here).
- the second switch 5 and in particular its movable contact 5.1 is preferably actuated via a further mechanism 52, which is designed, for example, as a toggle lever device, and the second motor drive 50.
- the second motor drive 50 is preferably designed as a linear motor with a rotating spindle.
- a contact module 7 which can be connected by both the first and the second switch 4, 5.
- the contact module 7 has at least one first connection contact 7.1 and at least one second connection contact 7.2, which are arranged on an insulating material support.
- Both switch-on contacts 7.1, 7.2 each have a first contact point 7.11, 7.21 and a second contact point 7.12, 7.22.
- the first switch-on contact 7.1 has a first side 2.1 of the capacitor 2 and the second Switch-on contact 7.2 is electrically connected to a second side 2.2.
- the first motor drive 40 actuates the first switch 4 in such a way that the first motor drive 40 acts the mechanism 42 on the switching edge 41.
- the switching edge 41 carries out a vertical movement from bottom to top towards the contact module 7.
- the first contact tooth 4.1 is connected via the first contact point 7.11 of the first switch-on contact 7.1 and the second contact tooth 4.2 is connected via the first contact point 7.21 of the second switch-on contact 7.2.
- the capacitor 2 is short-circuited and discharged via the resistor 3.
- the second motor drive 50 actuates the second switch 5 in such a way that the second motor drive 50 acts on the movable contact 5.1 by means of the mechanism 52.
- the movable contact 5.1 carries out a vertical movement from bottom to top towards the contact module 7.
- a distance of at least 280mm is preferably covered. This route is particularly intended for an application range of the multi-level converter of 20kV.
- the second contact points 7.12, 7.22 of the switch-on contacts 7.1, 7.2 in the open, i.e. non-conductive, state are at least 280 mm away from the movable contact 5.1.
- the movable contact 5.1 When the second switch 5 is actuated, the movable contact 5.1 is electrically conductively connected to the switch-on contacts 7.1, 7.2 via the respective second contact points 7.12, 7.22. This creates a connection between the ground potential 20 and the capacitor 4; the capacitor 2 is grounded.
- the contact module 7 with its switching contacts 7.1, 7.2 thus offers a common contact point for the connection to the resistor 3 and the ground potential 20.
- Both the switching edge 41 and the movable contact 5.1, which is designed as a rail, are operated by the corresponding motor drives 40, 50 moves through a vertical movement and finally carry out the switching.
- a defined period of time must be maintained between the actuation of the first switch 4 and the second switch 5, during which a complete discharge of the capacitor can be assumed.
- the switching contacts 7.1, 7.2 of the switching edge 7 are preferably designed as spring-loaded contact blades.
- the multi-level converter 1 can have several capacitors 2.
- each capacitor has a first switch, a second switch and a resistor assigned. If there are several first switches, these are driven or actuated together via the first motor drive 40. Several second switches are driven or actuated together via the second motor drive 50.
- the motor drives 40, 50 are actuated or controlled by a control device.
- the control device has means or is set up in such a way that the first motor drive 40 and then the second motor drive 50 are always actuated.
- the multi-level converter 1 can have limit switches that transmit the actuation of the first and second switches 4, 5 to the control device. This determines the switching sequence of the first and second switches 4, 5.
- the contact module 7 accordingly has a pair of separate switch-on contacts 7.1, 7.2 for each cell 9 or capacitor 2.
- the movable contact 5.1 is designed to be correspondingly large so that it can contact all switch-on contacts of the multi-level converter and thus ground several cells 9 with all capacitors 2.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
- Trip Switchboards (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022112579.3A DE102022112579A1 (de) | 2022-05-19 | 2022-05-19 | Multi Level Konverter |
| PCT/EP2023/062082 WO2023222420A1 (de) | 2022-05-19 | 2023-05-08 | Mehrpunktumrichter mit mechanisch geschaltetem entladewiderstand und erdungsschalter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4519970A1 true EP4519970A1 (de) | 2025-03-12 |
Family
ID=86603803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23726298.5A Withdrawn EP4519970A1 (de) | 2022-05-19 | 2023-05-08 | Mehrpunktumrichter mit mechanisch geschaltetem entladewiderstand und erdungsschalter |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250337342A1 (de) |
| EP (1) | EP4519970A1 (de) |
| JP (1) | JP2025515731A (de) |
| CN (1) | CN119213682A (de) |
| DE (1) | DE102022112579A1 (de) |
| WO (1) | WO2023222420A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012015575A1 (de) | 2012-08-07 | 2014-02-13 | Li-Tec Battery Gmbh | Verfahren zur Formierung einer elektrochemischen Zelle, elektrochemische Zelle und Batterie |
| US9515506B2 (en) * | 2013-06-17 | 2016-12-06 | Abb Technology Ltd | Capacitor short-circuiting in a high voltage converter |
| DE102013021606A1 (de) * | 2013-10-15 | 2015-04-16 | Liebherr-Components Biberach Gmbh | Arbeitsmaschine mit Elektroantrieb |
| EP3091551A1 (de) | 2015-05-06 | 2016-11-09 | ABB Technology AG | Kombinierte entladungs- und erdungsvorrichtung für hochspannungsstromwandler |
| DE102017221085B4 (de) | 2017-11-24 | 2020-02-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Stromrichterschaltung |
-
2022
- 2022-05-19 DE DE102022112579.3A patent/DE102022112579A1/de not_active Ceased
-
2023
- 2023-05-08 CN CN202380041301.6A patent/CN119213682A/zh active Pending
- 2023-05-08 EP EP23726298.5A patent/EP4519970A1/de not_active Withdrawn
- 2023-05-08 WO PCT/EP2023/062082 patent/WO2023222420A1/de not_active Ceased
- 2023-05-08 JP JP2024566323A patent/JP2025515731A/ja active Pending
- 2023-05-08 US US18/866,621 patent/US20250337342A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022112579A1 (de) | 2023-11-23 |
| WO2023222420A1 (de) | 2023-11-23 |
| US20250337342A1 (en) | 2025-10-30 |
| JP2025515731A (ja) | 2025-05-20 |
| CN119213682A (zh) | 2024-12-27 |
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