CN206211525U - A kind of space flight overvoltage crowbar based on S3R - Google Patents
A kind of space flight overvoltage crowbar based on S3R Download PDFInfo
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- CN206211525U CN206211525U CN201620938176.6U CN201620938176U CN206211525U CN 206211525 U CN206211525 U CN 206211525U CN 201620938176 U CN201620938176 U CN 201620938176U CN 206211525 U CN206211525 U CN 206211525U
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Abstract
A kind of space flight overvoltage crowbar based on S3R, including：N power diode D1~Dn, N-type MOSFET Q1, hysteresis comparator and driver, wherein, n is positive integer；Power diode D1The negative electrode of~Dn with N-type MOSFET Q1Drain electrode be connected, power diode D1~DnPositive level respectively with corresponding S3R circuit topologies in, middle the common port for being connected to the diode of the series connection of any two on bus is connected；N-type MOSFET Q1Gate pole be connected with the output end of hysteresis comparator and driver, N-type MOSFET Q1Source ground；The positive termination S3R circuit topologies median generatrix regulating error device of hysteresis comparator and driver, negative terminal meets reference voltage V ref (n+1).The utility model in the case of bus overvoltage, triggers overvoltage crowbar automatically for can not carry out switch-mode regulation, cause the too high shortcoming of heat consumption by incision load at present, carries out switch-mode regulation, it is ensured that busbar voltage meets the requirements.
Description
Technical field
The utility model is related to a kind of overvoltage crowbar.
Background technology
For the power-supply controller of electric using S3R (sequence switch shunt regulating) topologys, it can be used to adjusting full bus and not
Various occasions such as regulation bus.Under normal circumstances, the power-supply controller of electric that multistage S3R is composed in parallel is in bus regulating error device
Under control, only one-level S3R is in Switching Shunt adjustment state, and benchmark corresponding to this grade of S3R is opened, turns off thresholding in bus
In the adjustable range of regulating error device voltage；Or it is in for bus state, the shutoff door corresponding to its benchmark to be left at different levels
Limit value is respectively less than bus regulating error device voltage；It is that, in SHUNT state, the thresholding of opening corresponding to its benchmark is all higher than
Bus regulating error device voltage, it is ensured that the electric current needed for load, so that busbar voltage stabilization.
If the MOSFET for being shunted over the ground in S3R circuit topologies all the way occurs open failure, it can not be missed according to bus
The control requirement of dropout regulator, by unnecessary current distributing to ground, but is directly connected solar battery array by power diode
Bus is connected to, if the electric current required for now loading is less than the electric current that one-level solar battery array is provided, then open failure one
The electric current that level is provided causes bus overvoltage phenomenon more than the electric current needed for load.For full regulation bus, bus overvoltage is carried
Lotus is born under condition of high voltage, it is possible to be damaged；For not adjusting bus, underloading is generally present in battery constant-voltage charge rank
Section, when bus excessively stream, is subject to the clamper of battery tension, charging current to exceed its rated value, make electric power storage due to bus
Pond may be damaged due to overcharging.
The overvoltage crowbar of S3R circuit topologies is currently based on, bus overvoltage is usually detected more than after thresholding, used
Input load carries out overvoltage protection, and the power of its load is more than the power that one-level square formation can be provided.But due to one-level square formation
Power generally in hectowatt magnitude, and after bus is put into the load, adjustment state it can't be operated in by switch control, and
It is to be connected on bus as load always, its heat consumption can not be ignored.Only arrive bus regulating error device and be operated in normal region
Afterwards, and after being aided with telecommand just overvoltage circuit is resetted, load is cut off from bus, realize over-voltage protecting function.
Utility model content
Technology solve problem of the present utility model is：Overcome the deficiencies in the prior art, the utility model provides a kind of base
In the space flight overvoltage crowbar of S3R, can not carry out switch-mode regulation for the load of dependence incision at present, cause heat consumption too high
Shortcoming, in the case of bus overvoltage, triggers overvoltage crowbar automatically, carries out switch-mode regulation, it is ensured that busbar voltage meets the requirements.
Technical solution of the present utility model is：A kind of space flight overvoltage crowbar based on S3R, including：N work(
Rate diode D1~Dn, N-type MOSFET Q1, hysteresis comparator and driver, wherein, n is positive integer；Power diode D1~Dn
Negative electrode with N-type MOSFET Q1Drain electrode be connected, power diode D1~DnPositive level opened up with corresponding S3R circuits respectively
The middle connection common port of the diode of any two series connection on median generatrix is flutterred to be connected；N-type MOSFET Q1Gate pole compare with sluggish
Output end compared with device and driver is connected, N-type MOSFET Q1Source ground；The positive termination S3R of hysteresis comparator and driver
Bus regulating error device in circuit topology, negative terminal meets reference voltage V ref (n+1).
The value of the n is consistent with the number of S3R circuit topologies.
The power diode D1~DnIt is in parallel with a power diode respectively.
The N-type MOSFET Q1Gate pole connects the drain electrode of another N-type MOSFET, the gate pole of another N-type MOSFET with
The output end of hysteresis comparator and driver is connected, the source ground of another N-type MOSFET.
The sluggish width of the hysteresis comparator and driver is consistent with the hysteresis voltage width of S3R circuit topologies.
The output of thresholding or shut-off thresholding in bus regulating error device is opened corresponding to the reference voltage V ref (n+1)
In the range of.
The utility model advantage compared with prior art is：
(1) circuit of the present utility model is simple and reliable, cost-effective, using S3R circuit topologies and bus error amplifier
Work characteristics, only increase power diode, N-type MOSFET and the hysteresis comparator and driver consistent with S3R circuit topologies,
Overvoltage protection regulatory function is realized, development cost is greatlyd save.
(2) the utility model power consumption is small, and original overvoltage crowbar is all dissipated away energy by load, to radiating
Etc. proposing requirement higher, and the utility model carries out Switching Shunt regulation by by unnecessary electric current, only in the pole of power two
Pipe and N-type MOSFET produce loss, and compared to original method, heat consumption is greatly reduced, and due to overvoltage crowbar, open failure
The diode of one-level constitutes a new S3R circuit topology, and its heat consumption is consistent with normal S3R circuit topologies, it is believed that overvoltage is protected
Protection circuit is substantially without unnecessary heat consumption.
(3) the utility model is compared with original overvoltage crowbar, and original overvoltage crowbar median generatrix overvoltage protection is electric
Road needs bus overvoltage to detect circuit and the input and the excision that coordinate telecommand to realize over-voltage protecting function, intelligent water
It is flat inadequate, and the characteristics of the utility model foundation hysteresis comparator, it is autonomous to complete, the interference in the external world is not required to, control simple and reliable.
Brief description of the drawings
Fig. 1 is the overvoltage crowbar figure based on S3R of the present utility model；
Fig. 2 is the graph of a relation of bus regulating error device output voltage of the present utility model and output current；
Fig. 3 is to connect n grades of S3R circuit topology schematic diagram after overvoltage protection topology；
Fig. 4 is the workflow diagram of overvoltage crowbar of the present utility model.
Specific embodiment
As shown in figure 1, a kind of space flight overvoltage crowbar based on S3R, including：N power diode D1~Dn, 1
N-type MOSFET (mos field effect transistor) Q1With the hysteresis comparator and driver for driving N-type MOSFET,
Wherein, n is positive integer.Constituting the connection of overvoltage crowbar is：Power diode (D1~Dn) negative electrode be connected in parallel, even
It is connected to N-type MOSFET Q1Drain electrode, power diode (D1~Dn) positive level be connected respectively to corresponding S3R circuit topologies
In, the middle connection common port of the diode of any two series connection on the bus of S3R circuit topologies is connected to, for example：Wherein one
Kind of connected mode can be with as shown in figure 3, on the bus of S3R circuit topologies in parallel with two other two after two diodes in parallel
Pole pipe is connected, power diode (D1~Dn) positive level be connected to four common ports of diode；Power diode (D1~Dn)
Number determined by the number of S3R circuit topologies, N-type MOSFET Q1Source class be coupled directly to ground.N-type MOSFET Q1Door
Level is connected to the output par, c of hysteresis comparator.Bus regulating error device in the positive termination S3R circuit topologies of hysteresis comparator,
Negative terminal connects its reference voltage V ref (n+1).Power diode (D1~Dn) can be single power diode, or according to
Space flight reliability requirement, is composed in parallel using two power diodes.N-type MOSFET Q1Can be it is single, or according to
Space flight reliability requirement, is composed in series using two N-type MOSFET, N-type MOSFET Q1Gate pole connects another N-type MOSFET
Drain electrode, the gate pole of another N-type MOSFET is connected with the output end of hysteresis comparator and driver, another N-type MOSFET
Source ground.
The sluggish width of hysteresis comparator should be with the hysteresis voltage width one of normal S3R circuit topologies in overvoltage crowbar
Cause, during ensureing that it is operated in overvoltage protection, bus ripple is consistent with original, its reference voltage V ref (n+1) is than other S3R electricity
The benchmark of road topology is all high.
As shown in Fig. 2 the value of the reference voltage V ref (n+1) of overvoltage crowbar can be according to the base of original n grades of S3R
Quasi- value method for designing is designed value, it is also possible to which a reference value than designing is high, but must assure that reference voltage V ref (n+1) institute
Corresponding thresholding and the shut-off thresholding opened is in the output area of bus regulating error device.And sluggish width should be with normal S3R electricity
The hysteresis voltage width of road topology is consistent, and during ensureing that it is operated in overvoltage protection, bus ripple is consistent with original.
As shown in Fig. 2 the operation principle of bus regulating error device is the magnitude of voltage that output is adapted with bus current,
Electric current needed for bus is inversely proportional with the output voltage of bus regulating error device, that is, electric current is smaller needed for bus, bus error
Regulator output voltage is higher.Simultaneously between bus regulating error device output voltage and busbar voltage, following rule is met：Bus
During voltage reduction, bus regulating error device output voltage is also reduced, when busbar voltage is raised, bus regulating error device output voltage
Also raise.
The workflow diagram of the space flight overvoltage crowbar based on S3R is as shown in Figure 4：
Under normal circumstances, the output voltage of bus regulating error device opens threshold value, N-type less than overvoltage crowbar
MOSFET Q1Disconnect, overvoltage crowbar does not work.When the MOSFET for having a topology in n grades of S3R circuit topology is opened
When road is failed, this grade of S3R circuit topology will can not carry out shunt regulating according to the control of bus regulating error device, can only be by the sun
The electric current of cell array is transferred to bus.
If electric current needed for bus can basis more than the electric current that one-level solar battery array is provided, now bus regulating error device
Position in n grades of S3R circuit topology where open failure level S3R circuit topologies, produces corresponding change, adjusts S3R electricity at different levels
The working condition of road topology, it is ensured that the electric current needed for load, makes busbar voltage stabilization, and now overvoltage crowbar does not work.
If the electric current needed for load is less than the electric current needed for one-level solar battery array, then open failure one-level is provided
Electric current will be greater than the electric current needed for loading, and cause bus overvoltage phenomenon.Working condition now is the topology except open failure
Outside its electric current supply bus, other n-1 grades of S3R circuit topology is all in SHUNT state.The voltage of bus regulating error device is therewith
Raise, when corresponding to it is more than overvoltage crowbar when opening thresholding, N-type MOSFET Q1Closure, by the electricity of solar battery array
Flow point flows to ground, and busbar voltage is reduced, and the voltage of bus regulating error device is also reduced, when it is less than closing corresponding to protection circuit
When closing threshold value, N-type MOSFET Q1Disconnect, the electric current of solar battery array is supplied into bus, busbar voltage is raised, and is repeated above-mentioned
Regulation process, busbar voltage is in normal range (NR), and overvoltage crowbar is in running order.Now overvoltage crowbar and open
Diode circuit would be combined into a new S3R circuit in the failure of road, and it can be by the electric current of solar battery array by protecting electricity
Road is diverted to ground, also solar battery array electric current can be transported into bus by the diode paths after open failure.
The content not being described in detail in the utility model specification belongs to the known technology of those skilled in the art.
Claims (6)
1. a kind of space flight overvoltage crowbar based on S3R, it is characterised in that including：N power diode D1~Dn, N-type
MOSFET Q1, hysteresis comparator and driver, wherein, n is positive integer；Power diode D1The negative electrode of~Dn is and N-type
MOSFET Q1Drain electrode be connected, power diode D1~DnPositive level take up an official post with corresponding S3R circuit topology median generatrixs respectively
Connection common port is connected in the middle of two diodes of series connection of meaning；N-type MOSFET Q1Gate pole and hysteresis comparator and driver
Output end be connected, N-type MOSFET Q1Source ground；In the positive termination S3R circuit topologies of hysteresis comparator and driver
Bus regulating error device, negative terminal meets reference voltage V ref (n+1).
2. a kind of space flight overvoltage crowbar based on S3R according to claim 1, it is characterised in that：The n's takes
Value is consistent with the number of S3R circuit topologies.
3. a kind of space flight overvoltage crowbar based on S3R according to claim 1 and 2, it is characterised in that：The work(
Rate diode D1~DnIt is in parallel with a power diode respectively.
4. a kind of space flight overvoltage crowbar based on S3R according to claim 1 and 2, it is characterised in that：The N
Type MOSFET Q1Gate pole connects the drain electrode of another N-type MOSFET, the gate pole of another N-type MOSFET and hysteresis comparator and
The output end of driver is connected, the source ground of another N-type MOSFET.
5. a kind of space flight overvoltage crowbar based on S3R according to claim 1 and 2, it is characterised in that：It is described slow
The sluggish width of stagnant comparator and driver is consistent with the hysteresis voltage width of S3R circuit topologies.
6. a kind of space flight overvoltage crowbar based on S3R according to claim 5, it is characterised in that：The benchmark
Corresponding to voltage Vref (n+1) open thresholding or shut-off thresholding in the output area of bus regulating error device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620938176.6U CN206211525U (en) | 2016-08-24 | 2016-08-24 | A kind of space flight overvoltage crowbar based on S3R |
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| CN201620938176.6U CN206211525U (en) | 2016-08-24 | 2016-08-24 | A kind of space flight overvoltage crowbar based on S3R |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171550A (en) * | 2017-06-23 | 2017-09-15 | 深圳市航天新源科技有限公司 | A kind of large power supply controller |
| CN110048591A (en) * | 2019-04-03 | 2019-07-23 | 深圳市航天新源科技有限公司 | A kind of S3R shunts immediate current suppression circuit and method |
| CN112018743A (en) * | 2020-08-25 | 2020-12-01 | 中国科学院上海高等研究院 | Passive Internet of things chip overvoltage protection circuit and implementation method thereof |
| WO2021254530A1 (en) * | 2020-06-19 | 2021-12-23 | 浙江鲲悟科技有限公司 | Compressor frequency conversion speed regulation system and direct current bus voltage overvoltage protection method |
-
2016
- 2016-08-24 CN CN201620938176.6U patent/CN206211525U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171550A (en) * | 2017-06-23 | 2017-09-15 | 深圳市航天新源科技有限公司 | A kind of large power supply controller |
| CN107171550B (en) * | 2017-06-23 | 2019-05-31 | 深圳市航天新源科技有限公司 | A kind of large power supply controller |
| CN110048591A (en) * | 2019-04-03 | 2019-07-23 | 深圳市航天新源科技有限公司 | A kind of S3R shunts immediate current suppression circuit and method |
| WO2021254530A1 (en) * | 2020-06-19 | 2021-12-23 | 浙江鲲悟科技有限公司 | Compressor frequency conversion speed regulation system and direct current bus voltage overvoltage protection method |
| CN112018743A (en) * | 2020-08-25 | 2020-12-01 | 中国科学院上海高等研究院 | Passive Internet of things chip overvoltage protection circuit and implementation method thereof |
| CN112018743B (en) * | 2020-08-25 | 2022-06-17 | 中国科学院上海高等研究院 | Passive Internet of things chip overvoltage protection circuit and implementation method thereof |
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