CN205681113U - A kind of DC loop current rate of change suppressor based on magnetic saturation characteristic - Google Patents
A kind of DC loop current rate of change suppressor based on magnetic saturation characteristic Download PDFInfo
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- CN205681113U CN205681113U CN201620571751.3U CN201620571751U CN205681113U CN 205681113 U CN205681113 U CN 205681113U CN 201620571751 U CN201620571751 U CN 201620571751U CN 205681113 U CN205681113 U CN 205681113U
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- direct current
- current winding
- permanent magnet
- change
- circuit
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Abstract
The utility model discloses a kind of DC loop current rate of change suppressor based on magnetic saturation characteristic, including iron core, permanent magnet, direct current winding L and sustained diode, permanent magnet and iron core group circularize structure；It is wrapped on iron core according to clockwise direction from the B end of the A end of direct current winding L to direct current winding L；The N pole of permanent magnet is located close to the A end side of direct current winding L, and the S pole of permanent magnet is located close to the B end side of direct current winding L, and sustained diode is in parallel with direct current winding L.The utility model is the direct current component that the side a and b by this DC loop current rate of change suppressor is connected on electric and electronic power change-over circuit based on the application of the DC loop current rate of change suppressor of magnetic saturation characteristic.The utility model can suppress electric and electronic power translation circuit direct current to survey fault current rate of change when being short-circuited effectively, enables circuit protection device to have abundant action time, is greatly enhanced security, reliability and the economy of circuit.
Description
Technical field
The utility model relates to a kind of power electronic devices protection device, particularly relates to a kind of novel electromagnetic component.
Background technology
Every field is all widely used for the power conversion circuit in Power Electronic Technique, such as inverter circuit, DC/DC electricity
Road etc..In the increase of social development and high-voltage large current device, this type of circuit, direct current is measured existing overcurrent and is often made
Become the damage of circuit devcie, how to be effectively prevented from this type of damage and be just particularly important.But use overcurrent relay or
The actuation time of fastp-acting fuse protection generally requires hundreds of millisecond, and the overcurrent time of bearing of many devices is Microsecond grade
Not, for example must turn off in 10 microseconds when IGBT bears 4-5 times of rated current, not yet discovery can be cut off in delicate level at present
The protection device of main circuit.
Utility model content
The phenomenon damaged for power inverter all kinds of power electronic devices momentary excess current, utilizes magnetic saturation characteristic development
A kind of DC loop current rate of change suppressor of exploitation, limits the rate of rise of electric current, it is ensured that GPF (General Protection False device is (molten effectively
Disconnected device FU) there are sufficient time disengagement failure circuit, the safe operation of protection power electronic devices, improve power conversion circuit
Reliability.
In order to solve above-mentioned technical problem, the utility model proposes a kind of DC loop current based on magnetic saturation characteristic and become
Rate suppressor, including iron core, permanent magnet, direct current winding L and sustained diode, described permanent magnet and iron core group circularize knot
Structure；The two ends of described direct current winding L are respectively side a and b, from the B end of the A end of described direct current winding L to described direct current winding L
It is wrapped on described iron core according to clockwise direction；The N pole of described permanent magnet is located close to the A end side of described direct current winding L, institute
The S pole stating permanent magnet is located close to the B end side of described direct current winding L, and described sustained diode is with described direct current winding L simultaneously
Connection.
Compared with prior art, the beneficial effects of the utility model are:
The utility model utilizes the magnetic saturation characteristic of ferromagnetic material, constitutes nonlinear inductance, applies to increasingly extensive electricity
Power electronic power translation circuit, solves a key technology difficult problem for power electronic devices reliability service, relates to subject crossing and base
The problem in science of this material behavior, provides class electromagnet parts for field of engineering technology.Power converter is widely used in
Industrial and social each field, the utility model can be effectively based on the DC loop current rate of change suppressor of magnetic saturation characteristic
Suppression electric and electronic power translation circuit direct current surveys fault current rate of change when being short-circuited, and enables circuit protection device to have
It abundant action time, is greatly enhanced security, reliability and the economy of circuit.
Brief description
Fig. 1 is the structural representation based on the DC loop current rate of change suppressor of magnetic saturation characteristic for the utility model；
Fig. 2 is that the suppressor of DC loop current rate of change shown in Fig. 1 is illustrated for the connection in three-phase AC-DC-AC circuit
Figure；
Fig. 3 is the suppressor application effect schematic diagram of DC loop current rate of change shown in Fig. 2.
Detailed description of the invention
With specific embodiment, technical solutions of the utility model are described in further detail below in conjunction with the accompanying drawings, described
The utility model is only explained by specific embodiment, not in order to limit the utility model.
As it is shown in figure 1, a kind of DC loop current rate of change suppressor based on magnetic saturation characteristic of the utility model, including
Iron core, permanent magnet, direct current winding L and sustained diode, described permanent magnet and iron core group circularize structure；Described direct current winding L
Two ends be respectively side a and b, from the A end of described direct current winding L to described direct current winding L B end according to clockwise direction be wound around
On described iron core；The N pole of described permanent magnet is located close to the A end side of described direct current winding L, the S pole position of described permanent magnet
In the B end side near described direct current winding L, described sustained diode is in parallel with described direct current winding L.
When circuit is short-circuited fault, instantaneous short-circuit overcurrent just can reach damage power electronics within the Microsecond grade time
The threshold value of device, and circuit protection device actuation time is often all at Millisecond, thus be difficult to meet normal cutoff fault current
Needs.
The utility model, will as shown in Figure 1 based on the application of the DC loop current rate of change suppressor of magnetic saturation characteristic
The side a and b based on the DC loop current rate of change suppressor of magnetic saturation characteristic be connected on electric and electronic power conversion electricity
The direct current component on road.As in figure 2 it is shown, described electric and electronic power change-over circuit is a three-phase AC-DC-AC circuit, described three-phase
AC-DC-AC circuit includes three phase mains, rectified three-phase circuit, three-phase inverting circuit and filter capacitor C, this three-phase AC-DC-AC
The direct-flow input end of circuit is additionally provided with fuse FU, by the described DC loop current rate of change suppressor based on magnetic saturation characteristic
Seal in the DC side at described three-phase AC-DC-AC circuit by side a and b.
When there being electric current to pass through, direct current winding L produces magnetic field in the core, and the ring being made up of described permanent magnet and iron core
The magnetic that permanent magnet magnetism in the iron circuit of shape structure produces with this direct current winding L is contrary.Fig. 3 shows core sataration district
And inelastic region, when this three-phase AC-DC-AC circuit is in no-failure operation state, the value that direct current surveys electric current is less, generation
After the magnetic field superposition of magnetic field and permanent magnet, make iron core still in degree of depth saturation state (see the saturation region of mark in Fig. 3), direct current around
Group presents Low ESR, and the back-emf that electric current produces is very little, can ignore.
When short trouble occurs in three-phase AC-DC-AC circuit, and direct current survey electric current exceedes a certain limit value, iron core exits full
And state, entering into inelastic region (between-m to m in Fig. 3), direct current winding presents high impedance, limits electric current Rapid Variable Design,
Make it change to the warning value time and increase to Millisecond, thus protect device (i.e. shown in Fig. 2 in three-phase inverting circuit below
V1-V6) action, make fuse FU have enough time and then disconnect main circuit.
Although being described the utility model above in conjunction with accompanying drawing, but the utility model is not limited to above-mentioned
Detailed description of the invention, above-mentioned detailed description of the invention is only schematically, rather than restricted, the ordinary skill of this area
Personnel, under enlightenment of the present utility model, in the case of without departing from the utility model objective, can also make many variations, this
Belong within protection of the present utility model.
Claims (1)
1. the DC loop current rate of change suppressor based on magnetic saturation characteristic, it is characterised in that include iron core, permanent magnetism
Body, direct current winding L and sustained diode, described permanent magnet and iron core group circularize structure；The two ends of described direct current winding L are divided
Not Wei side a and b, be wrapped in described iron from the A end of described direct current winding L to the B end of described direct current winding L according to clockwise direction
On core；The N pole of described permanent magnet is located close to the A end side of described direct current winding L, and the S pole of described permanent magnet is located close to institute
Stating the B end side of direct current winding L, described sustained diode is in parallel with described direct current winding L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620571751.3U CN205681113U (en) | 2016-06-13 | 2016-06-13 | A kind of DC loop current rate of change suppressor based on magnetic saturation characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620571751.3U CN205681113U (en) | 2016-06-13 | 2016-06-13 | A kind of DC loop current rate of change suppressor based on magnetic saturation characteristic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205681113U true CN205681113U (en) | 2016-11-09 |
Family
ID=57431983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620571751.3U Expired - Fee Related CN205681113U (en) | 2016-06-13 | 2016-06-13 | A kind of DC loop current rate of change suppressor based on magnetic saturation characteristic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205681113U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870900A (en) * | 2016-06-13 | 2016-08-17 | 天津大学 | Direct-current loop current derivation suppressor based on magnetic saturation characteristic and application thereof |
-
2016
- 2016-06-13 CN CN201620571751.3U patent/CN205681113U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870900A (en) * | 2016-06-13 | 2016-08-17 | 天津大学 | Direct-current loop current derivation suppressor based on magnetic saturation characteristic and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161109 Termination date: 20170613 |