CN205945500U - Power unit and high -voltage inverter for high -voltage inverter - Google Patents
Power unit and high -voltage inverter for high -voltage inverter Download PDFInfo
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- CN205945500U CN205945500U CN201620908335.8U CN201620908335U CN205945500U CN 205945500 U CN205945500 U CN 205945500U CN 201620908335 U CN201620908335 U CN 201620908335U CN 205945500 U CN205945500 U CN 205945500U
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- bus
- circuit board
- high voltage
- voltage converter
- contact resistance
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Abstract
The utility model provides a power unit and high -voltage inverter for high -voltage inverter, power unit includes shell and circuit board, just switch element and dc bus have on the circuit board, still be equipped with contact resistance on the circuit board, and this contact resistance's first end and dc bus electrically conductively are connected, the second end electrically conducts with the shell and is connected. The utility model discloses an increase contact resistance between power unit's shell and dc bus, can make among the high -voltage inverter between the power unit and form the high impedance between power unit and the metal rack to obstruct discharge current's production.
Description
Technical field
The utility model is related to frequency converter field, more particularly, it relates to a kind of high voltage converter power cell and height
Voltage frequency changer.
Background technology
Frequency converter (Variable-frequency Drive, VFD) is application converter technique and microelectric technique, by changing
Become motor working power Frequency Patterns to control the electric control appliance of ac motor.Specifically, frequency converter is using internal
IGBT cut-offs the voltage to adjust out-put supply and frequency, to provide its required power supply electricity according to being actually needed of motor
Pressure, and then reach the purpose of energy-conservation, speed governing.With the continuous improvement of industrial automatization, frequency converter has also obtained very wide
General application.
In recent years, with miniaturization and powerful requirement, the power density more and more higher of high voltage converter, structure design
More and more compacter, correspondingly, the distance between each power cell is further shortened.Thus leading to hold between power cell
Easily Discharge Phenomena.
In the environment of rainy season high humidity, power cell shell and adjacent power cell enclosure and power cell shell
Easily Discharge Phenomena and between metal cabinet, thus cause damage to power cell.
Utility model content
The technical problems to be solved in the utility model is, for above-mentioned power cell between easily electric discharge occurs and leads to power
The problem that unit damages, provides a kind of high voltage converter power cell and high voltage converter.
The technical scheme that the utility model solves above-mentioned technical problem is to provide a kind of high voltage converter power cell,
Including shell and circuit board, and switch element and dc bus are had on described circuit board, described circuit board is additionally provided with contact
Resistance, and the first end of this contact resistance is conductively connected with dc bus, the second end is connected with housings conductive.
In high voltage converter power cell described in the utility model, described circuit board is provided with water conservancy diversion terminal and institute
The second end stating contact resistance is electrically connected to this water conservancy diversion terminal, and described water conservancy diversion terminal passes through connection cables with housings conductive even
Connect.
In high voltage converter power cell described in the utility model, described connection cables are led with shell by screw
Electrical connection.
In high voltage converter power cell described in the utility model, the dc bus on described circuit board is just included
It is serially connected with least two divider resistances between dc bus and negative dc bus, and described positive direct-current bus and negative dc bus,
The first end of described contact resistance is connected to negative dc bus or the tie point of any two divider resistance.
The utility model also provides a kind of high voltage converter, and including multiple power cells, each described power cell includes
Switch element and dc bus are had on shell and circuit board, and described circuit board, described circuit board are additionally provided with contact resistance,
And the first end of this contact resistance is conductively connected with dc bus, the second end is connected with housings conductive.
In high voltage converter described in the utility model, the resistance of described contact resistance is outer with adjacent power cell
Spacing between shell is directly proportional.
In high voltage converter described in the utility model, described circuit board is provided with water conservancy diversion terminal and described contact resistance
The second end be electrically connected to this water conservancy diversion terminal, described water conservancy diversion terminal is connected with housings conductive by connection cables.
In high voltage converter described in the utility model, described connection cables are connected with housings conductive by screw.
In high voltage converter described in the utility model, the dc bus on described circuit board include positive direct-current bus and
It is serially connected with least two divider resistances, described contact electricity between negative dc bus, and described positive direct-current bus and negative dc bus
The first end of resistance is connected to negative dc bus or the tie point of any two divider resistance.
High voltage converter power cell of the present utility model and high voltage converter have the advantages that：By in work(
Increase contact resistance between the shell of rate unit and dc bus, can make in high voltage converter between power cell and power
Form high impedance, thus hindering the generation of discharge current between unit and metal cabinet.The utility model can decay power unit
The leakage current of shell is so that electric discharge phenomena are resolved from root.
Brief description
Fig. 1 is the schematic diagram of the utility model high voltage converter power cell embodiment.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only in order to explain
The utility model, is not used to limit the utility model.
As shown in figure 1, being the schematic diagram of the utility model high voltage converter power cell embodiment.In the present embodiment
Power cell include having on shell 20 and circuit board, and circuit board switch element (such as IGBT etc.), dc bus 11 and
Contact resistance Rn, and the first end of this contact resistance Rn and dc bus 11 are conductively connected, the second end and shell 20 are conductively connected.
Above-mentioned shell 20 can be grounded, contact resistance Rn can using the larger resistance of resistance, for example the resistance of 470K Ω or
Resistance of 510K Ω etc. (resistance of contact resistance Rn can select according to different application scenarios).By this contact resistance Rn, can
Make between the multiple power cells in high voltage converter, and formed between power cell and the metal cabinet of high voltage converter
High impedance, thus hinder the generation of discharge current.
Specifically, foregoing circuit plate can be provided with water conservancy diversion terminal and the second end of contact resistance is electrically connected to this water conservancy diversion end
Son, water conservancy diversion terminal is conductively connected with shell 20 by connection cables.For example above-mentioned water conservancy diversion terminal can adopt female plug, and connection cables
First end be there is the male plug mated with water conservancy diversion terminal, on shell 20 arrange self-clinching nut, be then fixedly connected by screw
Second end of cable.
Especially, the dc bus on foregoing circuit plate includes positive direct-current bus and negative dc bus, and positive direct-current bus
It is serially connected with least two divider resistances and negative dc bus between, the first end of contact resistance Rn is connected to negative dc bus or appoints
The tie point (positive direct-current bus had better not be directly connected to) of two divider resistances of meaning.
The utility model also provides a kind of high voltage converter, and this high voltage converter includes multiple power cells, each described
Power cell includes shell and circuit board, and has switch element, dc bus and contact resistance on foregoing circuit plate, and this connects
Getting an electric shock, the first end hindering is conductively connected with dc bus, the second end is connected with housings conductive.
Especially, the spacing between the resistance of above-mentioned contact resistance and the shell of adjacent power cell is directly proportional, i.e. work(
The installing space of rate unit is bigger, and the resistance of contact resistance is also bigger.
Specifically, the second end of above-mentioned contact resistance can be connected to shell in the following manner：Setting is led on circuit boards
Second end of stream terminal and contact resistance is electrically connected to this water conservancy diversion terminal, and water conservancy diversion terminal passes through connection cables with housings conductive even
Connect.For example above-mentioned connection cables are connected with housings conductive by screw.
Dc bus on foregoing circuit plate includes positive direct-current bus and negative dc bus, and positive direct-current bus and negative direct current
It is serially connected with least two divider resistances, the first end of contact resistance is connected to negative dc bus or any two partial pressure between bus
The tie point of resistance.
The above, only the utility model preferably specific embodiment, but protection domain of the present utility model is not
It is confined to this, any those familiar with the art, in the technical scope that the utility model discloses, can readily occur in
Change or replacement, all should cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should
It is defined by scope of the claims.
Claims (9)
1. a kind of high voltage converter power cell, including shell and circuit board, and have on described circuit board switch element and
Dc bus it is characterised in that：Contact resistance, and the first end of this contact resistance and dc bus are additionally provided with described circuit board
It is conductively connected, the second end is connected with housings conductive.
2. high voltage converter power cell according to claim 1 it is characterised in that：Described circuit board is provided with water conservancy diversion
Second end of terminal and described contact resistance is electrically connected to this water conservancy diversion terminal, and described water conservancy diversion terminal passes through connection cables and shell
It is conductively connected.
3. high voltage converter power cell according to claim 2 it is characterised in that：Described connection cables pass through screw
It is connected with housings conductive.
4. high voltage converter power cell according to claim 1 it is characterised in that：Direct current on described circuit board is female
Line includes positive direct-current bus and negative dc bus, and is serially connected with least two points between described positive direct-current bus and negative dc bus
Piezoresistance, the first end of described contact resistance is connected to negative dc bus or the tie point of any two divider resistance.
5. a kind of high voltage converter, including multiple power cells, each described power cell includes shell and circuit board, and described
Switch element and dc bus are had on circuit board it is characterised in that：It is additionally provided with contact resistance on described circuit board, and this contact
The first end of resistance is conductively connected with dc bus, the second end is connected with housings conductive.
6. high voltage converter according to claim 5 it is characterised in that：The resistance of described contact resistance and adjacent power
Spacing between the shell of unit is directly proportional.
7. high voltage converter according to claim 5 it is characterised in that：Described circuit board is provided with water conservancy diversion terminal and described
Second end of contact resistance is electrically connected to this water conservancy diversion terminal, and described water conservancy diversion terminal is connected with housings conductive by connection cables.
8. high voltage converter according to claim 7 it is characterised in that：Described connection cables pass through screw and housings conductive
Connect.
9. high voltage converter according to claim 5 it is characterised in that：Dc bus on described circuit board includes honest
It is serially connected with least two divider resistances, institute between stream bus and negative dc bus, and described positive direct-current bus and negative dc bus
The first end stating contact resistance is connected to negative dc bus or the tie point of any two divider resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620908335.8U CN205945500U (en) | 2016-08-19 | 2016-08-19 | Power unit and high -voltage inverter for high -voltage inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620908335.8U CN205945500U (en) | 2016-08-19 | 2016-08-19 | Power unit and high -voltage inverter for high -voltage inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205945500U true CN205945500U (en) | 2017-02-08 |
Family
ID=57947667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620908335.8U Active CN205945500U (en) | 2016-08-19 | 2016-08-19 | Power unit and high -voltage inverter for high -voltage inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205945500U (en) |
-
2016
- 2016-08-19 CN CN201620908335.8U patent/CN205945500U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |