CN209233749U - Driver current-limited startup circuit for DC power-supply system - Google Patents
Driver current-limited startup circuit for DC power-supply system Download PDFInfo
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- CN209233749U CN209233749U CN201822083146.3U CN201822083146U CN209233749U CN 209233749 U CN209233749 U CN 209233749U CN 201822083146 U CN201822083146 U CN 201822083146U CN 209233749 U CN209233749 U CN 209233749U
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Abstract
The utility model relates to a kind of driver current-limited startup circuits for DC power-supply system, the driver current-limited startup circuit connects between DC power-supply system and DC servo or step-by-step system, the driver current-limited startup circuit includes power tube Q1, resistance R1, resistance R2, driving unit and delay unit, the collector of the power tube Q1 or drain electrode, driving unit and delay unit are connect with the power supply buses of DC power-supply system respectively, the emitter or source electrode of the power tube Q1 respectively with the one end resistance R2, driving unit, DC servo or step-by-step system connection, the driving unit is connect with the base stage of power tube Q1 or grid and the resistance R2 other end respectively, the resistance R1 is connected in parallel on the both ends power tube Q1.Compared with prior art, the utility model can overcome DC servo or stepper drive since inner space is limited, it is difficult to the advantages that placing the limitation of relay.
Description
Technical field
The utility model relates to a kind of driver current-limited startup circuit, more particularly, to a kind of for DC power-supply system
Driver current-limited startup circuit.
Background technique
In DC power-supply system, for example the dynamical system of warehouse logistics trolley is powered with battery (or super capacitor), is led to
Breaker (and/or relay) can be often installed on bus to realize fast powering-up and the power-off to rear end dynamical system.Due to
The presence (following Fig. 1) of breaker (and/or relay) rear end capacitive load, in the case where effective current limiting measures missing,
Great dash current (following Fig. 2) can be generated on the moment bus that K1 conducting powers on.
If inhibiting the generation of the dash current without effective measures, a series of problems can be caused:
(1) can cause power supply system abnormal.Battery system is generated in powered on moment Internal Management System (BMS system)
Protection, does not power.Switching Power Supply may also cause Voltage Drop or overcurrent protection under large inrush current.
(2) the great dash current of also has an impact to servo or step-by-step system.Dash current is not only to first device on bus
Part causes electric stress impact, while servo internal power circuit moment can be allowed to rise to level high, and control circuit by
Chip etc. is adjusted in voltage and needs settling time, and there may be uncertain states to power circuit during state initialization
It provides maloperation and causes system exception.
For dash current to system reliability bring adverse effect, current existing solution and method are as follows:
(1) the case where does not power for battery system protection, a kind of method is device systems integrator and battery producer ditch
It is logical, amplify the protection index of inside battery management system, allows the dash current in certain time to exist, it is sensitive to reduce protection
Degree.The disadvantages of the method are as follows battery supplier is needed to debug BMS management system according to actual loading, it is accurate reasonable to be difficult to determine
Protection threshold value, it is difficult to adapt to a variety of different capacitive load situations；
(2) the more common way of is using current-limited startup circuit, and this method is in AC synchronous sampling using relatively often
See.Here is the two kinds of common schemes retrieved under this method to the prior art:
(i) Jiang's money is good and Song Jinmei proposes " a method of protection charging current limiter resistance " (CN102629821B), i.e.,
Using power resistor after the completion of powering on current-limited startup, the method for relay short-circuit protection resistance is utilized.
(ii) Li Xing is big and Li Xingsan proposes " a kind of surge-prevention soft starting circuit " (CN201656760U), that is, uses
Power resistor drives thyristor in the method for short-circuit protection resistance after the completion of powering on current-limited startup using transformer winding.
Since the realization of both the above method needs to introduce the large-scale power device such as relay or transformer, to small size
The design of the structure of DC servo or the drive system using step brings difficulty, and DC servo is high current input system, if in mother
Such as thyristor device is introduced on line, can further increase system power dissipation loss.
Utility model content
The purpose of this utility model is exactly to provide a kind of for direct current to overcome the problems of the above-mentioned prior art
The driver current-limited startup circuit of power supply system.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of driver current-limited startup circuit for DC power-supply system, the driver current-limited startup circuit connect in direct current
Between power supply system and DC servo or step-by-step system, the driver current-limited startup circuit include power tube Q1, resistance R1,
Resistance R2, driving unit and delay unit, the collector of the power tube Q1 or drain electrode, driving unit and delay unit difference
Connect with the power supply buses of DC power-supply system, the emitter or source electrode of the power tube Q1 respectively with the one end resistance R2, drive
Moving cell, DC servo or step-by-step system connection, the driving unit respectively with the base stage of power tube Q1 or grid and resistance
The connection of the R2 other end, the resistance R1 are connected in parallel on the both ends power tube Q1.
Preferably, breaker or relay are equipped between the driver current-limited startup circuit and DC power-supply system
K1。
Preferably, the power tube Q1 is MOSFET or IGBT.
Preferably, the driving unit is power tube drive circuit.
Preferably, the delay unit is the delay timing circuit of delay time flexibly configurable.
Preferably, the resistance R1 is current-limiting resistance.
Preferably, the current-limiting resistance includes NTC, PTC, noninductive resistance or inductive resistance.
Compared with prior art, the utility model has the advantage that
(1) can overcome DC servo or stepper drive since inner space is limited, it is difficult to which the limitation for placing relay allows
Activation configuration design is more compact small and exquisite, generates heat lower, product is more competitive；
(2) is avoided that conventional relay contacts aging sintering bring open and close failure, extends life of product；
(3) is avoided that power consumption penalty caused by traditional thyristors scheme, reduces system heat generation.
Detailed description of the invention
Fig. 1 is the schematic diagram for realizing system electrification and power-off by breaker in the prior art；
Fig. 2 is bus impulse current waveform figure when starting in the prior art without current limiting measures；
Fig. 3 is the principles of the present invention figure；
Fig. 4 is using the current waveform figure after the utility model current limiting measures.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that described embodiment is a part of the embodiment of the utility model, rather than is all implemented
Example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained all should belong to the range of the utility model protection.
The method for the DC power supply power feed driver current-limited startup that the utility model is mentioned refers in powered on moment using electricity
Resistance carries out current-limited startup, and then using the power tube Delayed conducting on driving unit control bus, resistive short in parallel is protected
The method of shield.
The utility model main innovation point:
(1) substitutes traditional relay or Thyristors in series on DC bus with power tube (MOSFET or IGBT), watches
Current capacity when dress system operates normally on bus can be greatly improved, and power loss and fever can considerable decreases；
(2) power tube conducting delay time is adjustable on bus, and for different capacitive loads, Delayed conducting time parameter can
It is adjusted flexibly.
As shown in figure 3, a kind of driver current-limited startup circuit for DC power-supply system, the driver current-limited startup electricity
Road 2 connects between DC power-supply system 1 and DC servo or step-by-step system 3, and the driver current-limited startup circuit 2 includes function
Rate pipe Q1, resistance R1, resistance R2, driving unit 21 and delay unit 22, the collector (or drain electrode) of the power tube Q1 drive
Moving cell 21 and delay unit 22 are connect with the power supply buses of DC power-supply system respectively, the emitter of the power tube Q1
(or source electrode) is connect with the one end resistance R2, driving unit 21, DC servo or step-by-step system respectively, and the driving unit 21 divides
It is not connect with the base stage of power tube Q1 (or grid) and the resistance R2 other end, the resistance R1 is connected in parallel on the both ends power tube Q1.
Breaker or relay K1 are equipped between the driver current-limited startup circuit and DC power-supply system.Described
Power tube Q1 is MOSFET or IGBT.The driving unit is upper bridge power pipe driving chip, or with similar functions
Combinational circuit structure etc..The delay unit is the delay timing chip of delay time flexibly configurable, or is had similar
The circuit structure etc. of function.The resistance R1 is current-limiting resistance, including NTC, PTC, noninductive resistance or inductive resistance.
Using the method for the driver current-limited startup circuit for DC power-supply system, comprising the following steps:
(i) is before breaker or relay K1 are connected on the external bus of DC power-supply system, driving unit and resistance R2
Holding power tube Q1 is off state；
(ii) is closed moment in breaker or relay K1, and driving unit and resistance R2 still maintain power tube Q1 to close
Disconnected state, charging current enters in back end DC servo or step-by-step system by resistance R1, while delay unit starts timing；
(iii) is after the delay time set by delay unit, and power tube Q1 is connected driving unit, resistance
R1 is shorted by Q1 and protects；
(iv) after the completion of is powered on, when DC servo or step-by-step system operate normally, driving unit is always maintained at power tube Q1
For on state, input current all flows into DC servo or step-by-step system from power tube Q1.
The utility model current-limited startup method is by the power switch tube Delayed conducting on bus, to substitute traditional relay
(or conducting on thyristor) is conducted on device, with the scheme of short-circuit protection resistance.
Compared by Fig. 2 and Fig. 4, by the utility model current limiting technique, powered on moment bus dash current is dropped from 149A
As low as 10.15A, significant effect.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can be readily occurred in various
Equivalent modifications or substitutions, these modifications or substitutions should be covered within the scope of the utility model.Therefore, this is practical
Novel protection scope should be subject to the protection scope in claims.
Claims (6)
1. a kind of driver current-limited startup circuit for DC power-supply system, which connects supplies in direct current
Between electric system and DC servo or step-by-step system, which is characterized in that the driver current-limited startup circuit includes power tube
Q1, resistance R1, resistance R2, driving unit and delay unit, the collector or drain electrode, driving unit of the power tube Q1 and prolong
Shi Danyuan is connect with the power supply buses of DC power-supply system respectively, the emitter or source electrode of the power tube Q1 respectively with resistance
The one end R2, driving unit, DC servo or step-by-step system connection, the driving unit respectively with the base stage or grid of power tube Q1
Pole is connected with the resistance R2 other end, and the resistance R1 is connected in parallel on the both ends power tube Q1.
2. a kind of driver current-limited startup circuit for DC power-supply system according to claim 1, which is characterized in that
The power tube Q1 is MOSFET or IGBT.
3. a kind of driver current-limited startup circuit for DC power-supply system according to claim 1, which is characterized in that
The driving unit is power tube drive circuit.
4. a kind of driver current-limited startup circuit for DC power-supply system according to claim 1, which is characterized in that
The delay unit is the delay timing circuit of delay time flexibly configurable.
5. a kind of driver current-limited startup circuit for DC power-supply system according to claim 1, which is characterized in that
The resistance R1 is current-limiting resistance.
6. a kind of driver current-limited startup circuit for DC power-supply system according to claim 5, which is characterized in that
The current-limiting resistance includes NTC, PTC, noninductive resistance or inductive resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822083146.3U CN209233749U (en) | 2018-12-12 | 2018-12-12 | Driver current-limited startup circuit for DC power-supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822083146.3U CN209233749U (en) | 2018-12-12 | 2018-12-12 | Driver current-limited startup circuit for DC power-supply system |
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| Publication Number | Publication Date |
|---|---|
| CN209233749U true CN209233749U (en) | 2019-08-09 |
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ID=67507452
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822083146.3U Active CN209233749U (en) | 2018-12-12 | 2018-12-12 | Driver current-limited startup circuit for DC power-supply system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313766A (en) * | 2018-12-12 | 2020-06-19 | 上海安浦鸣志自动化设备有限公司 | Driver current-limiting starting circuit and method for direct-current power supply system |
| CN113937743A (en) * | 2021-10-18 | 2022-01-14 | 深圳英恒电子有限公司 | Impulse current suppression circuit |
-
2018
- 2018-12-12 CN CN201822083146.3U patent/CN209233749U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313766A (en) * | 2018-12-12 | 2020-06-19 | 上海安浦鸣志自动化设备有限公司 | Driver current-limiting starting circuit and method for direct-current power supply system |
| CN113937743A (en) * | 2021-10-18 | 2022-01-14 | 深圳英恒电子有限公司 | Impulse current suppression circuit |
| CN113937743B (en) * | 2021-10-18 | 2024-05-14 | 深圳英恒电子有限公司 | Impact current suppression circuit |
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