CN102545855A - Power switching tube driving method and system based on closed-loop control - Google Patents
Power switching tube driving method and system based on closed-loop control Download PDFInfo
- Publication number
- CN102545855A CN102545855A CN2012100140258A CN201210014025A CN102545855A CN 102545855 A CN102545855 A CN 102545855A CN 2012100140258 A CN2012100140258 A CN 2012100140258A CN 201210014025 A CN201210014025 A CN 201210014025A CN 102545855 A CN102545855 A CN 102545855A
- Authority
- CN
- China
- Prior art keywords
- voltage
- signal
- resistance
- circuit
- operational amplifier
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000000630 rising effect Effects 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims description 24
- 230000001276 controlling effect Effects 0.000 claims description 17
- 230000007423 decrease Effects 0.000 claims description 10
- 239000004065 semiconductor Substances 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Abstract
The invention discloses a power switching tube driving method based on closed-loop control, which comprises the steps of generating ramp voltage reference signals with linear rising and linear declining by a ramp voltage reference signal generating circuit according to connecting or disconnecting commands of switch control signals; introducing a voltage signal as feedback quantity from a power output end; comparing the ramp voltage reference signals and the introduced voltage signal to generate an error, and carrying out amplification adjustment on the error to generate a driving signal; and amplifying the driving signal to generate driving voltage, and driving a power switching tube to realize linear rising or linear declining of load voltage or power switching tube voltage along with the given ramp signals. The method adopts a control manner that a closed loop is adopted to control the linear change of the load voltage, so that the linear change of the load voltage or the power switching tube voltage can be well controlled under different semiconductor devices, different environmental conditions and different load conditions. The invention also discloses a power switching tube driving system based on the closed-loop control.
Description
Technical field
The invention belongs to power electronics and electrical field, relate to a kind of power switch tube drives technology, can open the linear change of control output loading voltage (or power switch tube voltage) in the turn off process at solid-state power controller based on closed-loop control.
Background technology
Solid-state power controller (Solid State Power Controller; Be called for short SSPC) be the important component part in the solid-state distribution system; It is the intelligent switch device that constitutes by power semiconductor; Be used to be switched on or switched off circuit, realize the control signal of circuit protection and reception prime computer and report its state information.It has contactless, no electric arc, noiseless, response is fast, electromagnetic interference is little, the life-span is long, reliability is high, be convenient to advantages such as computer remote control, just is being widely used in aspects such as aircraft, tank, steamer, civilian power distribution network.
In order to guarantee the safety of distribution system; Opening needs control load voltage build-up rate (du/dt) to reduce the impulse current under the capacitive load in the SSPC process; Need control load electric current rates of descent (di/dt) reducing the voltage stress that inductance produces on inductive load and the circuit on power switch pipe when turn-offing SSPC, so solid-state power controller all adopt the control mode of " slow open, turn-off slowly ".
In patent ZL200510038027.0; Proposed to realize the method for " open slowly, turn-off slowly " with the RC network open loop; Impulse current when this kind method has suppressed to open capacitive load to a certain extent; Reduced the voltage stress that inductance produces on inductive load and the circuit when power switch pipe turn-offs, but it there is following shortcoming:
1) influenced by selected power switch pipe performance, circuit parameter, temperature etc. bigger for the switch performance of SSPC;
2) service time and turn-off time parameter are coupled mutually, need adjust the capacitance-resistance parameter in the drive circuit repeatedly when regulating the time;
3) open in the turn off process not enough to the inhibition of du/dt and di/dt.
To above-mentioned shortcoming, the present invention proposes a kind of being applicable to like MOSFET, IGBT, and GTR, SiC JFET, the control mode of full-control type power switch pipes such as MCT adopts closed-loop control output loading voltage (or power switch tube voltage) linear change, and this case produces thus.
Summary of the invention
The object of the invention; Be to provide a kind of power switch tube drives method and system based on closed-loop control; It adopts the control mode of closed-loop control output loading voltage (or power switch tube voltage) linear change, can under different semiconductor device, varying environment condition and different loads condition, control output loading voltage (or power switch tube voltage) linear change well.
In order to reach above-mentioned purpose, solution of the present invention is:
A kind of power switch tube drives method based on closed-loop control comprises the steps: to produce the linear ramp voltage reference signal that rises or descend according to the order of opening or turn-off of switch controlling signal; Introduce a voltage signal as feedback quantity by power take-off; The voltage signal of aforementioned ramp voltage reference signal and introducing is compared the generation error, and it is amplified adjusting generation one drive signal; This drive signal produces driving voltage after amplifying, power switch pipe is driven, and realizes linear rising of the given ramp signal of load voltage or power switch pipe voltage follow or decline.
A kind of drive system of using above-mentioned power switch tube drives method based on closed-loop control; Comprise that the ramp voltage reference signal produces circuit, voltage feedback circuit, error regulating circuit and driving power amplifying circuit; The ramp voltage reference signal produces circuit and produces the linear ramp voltage reference signal that rises or descend according to switch controlling signal, sends into the error regulating circuit as input reference voltage; Voltage feedback circuit produces voltage feedback signal and sends into the error regulating circuit; Said error regulating circuit relatively produces error signal with input reference voltage and voltage feedback signal, and amplifies and regulate back input driving power amplifying circuit; The driving power amplifying circuit produces driving voltage driving power switching tube according to aforementioned input signal.
Above-mentioned voltage feedback circuit comprises first operational amplifier and 4 resistance, and wherein, the positive input terminal of first operational amplifier connects power take-off via first resistance, and this positive input terminal also connects the output of first operational amplifier via second resistance; The negative input end of said first operational amplifier connects Power Groud via the 3rd resistance, and this negative input end also is connected to control circuit with reference to ground via the 4th resistance; The output of said first operational amplifier connects the input of error regulating circuit.
Above-mentioned error regulating circuit comprises second operational amplifier, electric capacity and 4 resistance; Wherein, The positive input terminal of second operational amplifier connects the output that the ramp voltage reference signal produces circuit via the 5th resistance, and negative input end connects the output of voltage feedback circuit via the 6th resistance; One end of said electric capacity is connected with an end of the 7th resistance; And be connected to the negative output terminal of second operational amplifier jointly; The other end of this electric capacity connects an end of the 8th resistance; And the other end of the 8th resistance is connected with the other end of the 7th resistance, is connected to the output of second operational amplifier more jointly; The output of said second operational amplifier also connects the input of driving power amplifying circuit.
After adopting such scheme, beneficial effect of the present invention is following:
1) SSPC opens in the turn off process, output loading voltage (or power switch tube voltage) linear change;
2) SSPC open the turn-off time as required the user can freely adjust, adjustable range wide (hundreds of μ s are to the several seconds), and service time and turn-off time do not influence mutually, can regulate separately;
3) utilize feedback control principle, reduced the influence to the SSPC switch performance such as power switch pipe parameter, variations in temperature;
4) be applicable to various loads;
5) reduce the impulse current of opening in the capacitive load process effectively, can in design, increase service time and improve the band capacitance load capability, do not needed too much extra increase power switch pipe;
6) reduce the voltage stress that normal turn-off and fault are turn-offed power switch pipe in the inductive load process, improved the condition of work of power switch pipe, improved the safety of SSPC reliability and distribution system;
7) this scheme is applicable to following full-control type power switch pipe: MOSFET, IGBT, and GTR, SiC JFET, MCT etc., versatility is good.
Description of drawings
Fig. 1 is an integrated stand composition of the present invention;
Fig. 2 is the circuit diagram of first embodiment of the invention;
Fig. 3 is the working timing figure of first embodiment of the invention;
Fig. 4 is the circuit diagram of second embodiment of the invention;
Fig. 5 is the working timing figure of second embodiment of the invention.
Embodiment
Below will combine accompanying drawing, technical scheme of the present invention will be elaborated.
As shown in Figure 1, be the structure chart of the power switch tube drives system based on closed-loop control provided by the invention, comprise that the ramp voltage reference signal produces circuit, voltage feedback circuit, error regulating circuit and driving power amplifying circuit; Send when switch command and to open or when turn-offing order, the ramp voltage reference signal produces circuit and produces the linear ramp voltage reference signal that rises or descend, as input reference voltage V
Ref, voltage feedback circuit produces voltage feedback signal U
f, with aforementioned input reference voltage V
RefRelatively produce error signal, the error regulating circuit is to aforesaid voltage feedback signal U
fWith input reference voltage V
RefError amplify adjusting, behind the driving power amplifying circuit, produce driving voltage driving power switching tube, thereby force the voltage signal of feedback to follow the tracks of the input reference voltage of linear change, thereby make the load voltage linear change.
When load was connected, load voltage rose to supply voltage from zero line property in the service time of setting, and the impulse current in the time of can reducing to open capacitive load reduces the influence to electrical network, prevented the mistake protection.
When load was turn-offed, load voltage dropped to zero in the turn-off time internal linear of setting; Can reduce the voltage stress that circuit stray inductance and load inductance cause in the switching tube turn off process, improve reliability.
Based on aforementioned drive system, the present invention also provides a kind of power switch tube drives method based on closed-loop control, comprises the steps:
(1) the ramp voltage reference signal produces the ramp voltage reference signal of opening or turn-off order generation linear rising or descending of circuit according to switch controlling signal;
(2) voltage feedback circuit is introduced a voltage signal as feedback quantity by power take-off;
(3) the error regulating circuit compares the generation error with the voltage signal of aforementioned ramp voltage reference signal and introducing, and it is amplified adjusting generation one drive signal;
(4) the driving power amplifying circuit amplifies back generation driving voltage to aforementioned drive signal, and power switch pipe is driven, and realizes that the given ramp signal linearity of load voltage or power switch pipe voltage follow rises or descends.
Fig. 2 has provided the physical circuit figure of first embodiment of the invention, and concrete working method is:
1) the ramp voltage reference signal produces circuit: the reference voltage V that produces linear change according to switch controlling signal CMD
Ref, when switch controlling signal CMD provides high level, reference voltage V
RefThe linear rising; When switch controlling signal CMD provides low level, reference voltage V
RefLinear decline.
2) voltage feedback circuit: power take-off is connected to the positive input terminal of operational amplifier U1 through resistance R 5; Power Groud is connected to the negative input end of operational amplifier U1 through resistance R 6; The negative input end of U1 also through resistance R 8 connection control circuits with reference to ground, the positive input terminal of U1 connects the output of U1 through resistance R 7.
Load voltage dwindles corresponding multiple through this difference channel, produces a load voltage feedback signal U
f
3) error regulating circuit: reference voltage V
RefBe connected to the positive input terminal of operational amplifier U3, voltage feedback signal U through resistance R 10
fBe connected to the negative input end of operational amplifier U3 through resistance R 9; One end of resistance R 3 is connected with an end of capacitor C 2; And be connected to the negative input end of U3 jointly; The other end of this capacitor C 2 connects an end of resistance R 4, and the other end of resistance R 3 is connected to the output of U3 with the other end of resistance R 4 jointly.
Load voltage feedback signal U
fWith input reference voltage V
RefRelatively produce error signal, the error regulating circuit amplifies this error signal to be regulated, and produces prime drive signal U
GS1
4) driving power amplifying circuit: accept the prime drive signal U that prime error regulating circuit produces
GS1, it is amplified, produce final driving voltage U
GSThe driving power switching tube.
The main power circuit of foregoing circuit control comprises power switch pipe, detects resistance and load, and an end of power switch pipe connects the power input, and another termination detects an end of resistance; The other end that detects resistance connects power take-off, and said detection resistance is made to detect electric current and used; Above-mentioned power take-off connects an end of load, and the other end of load connects Power Groud.Above-mentioned control circuit with power switch pipe link to each other with current sense resistor a bit as control ground.
Fig. 3 has provided the working timing figure of first embodiment of the invention.T1～T4 period is that SSPC opens shutoff under the resistive load, and T5～T9 period is that SSPC opens shutoff under the capacitive load, and T10～T14 is that SSPC opens shutoff under the inductive load.
T1～T4 period: T1 moment, switch controlling signal CMD sends high level, reference voltage V
RefLinear rising, driving voltage U
GSRise to power switch pipe cut-in voltage value immediately, load voltage V
LoadTrack reference voltage V
RefThe linear rising; In the T2 moment, load voltage rises to the power input voltage value, and SSPC is open-minded fully; In the T3 moment, switch controlling signal CMD sends low level, reference voltage V
RefLinear decline, load voltage V
LoadTrack reference voltage V
RefLinear decline; The T4 moment, load voltage V
LoadReduce to 0, SSPC turn-offs fully.
T5～T9 period: T5 moment, switch controlling signal CMD sends high level, reference voltage V
RefLinear rising, load voltage V
LoadTrack reference voltage V
RefLinear rising, load current I
LoadRise to a certain value at once, and then linear the rising; In the T6 moment, load voltage rises to the power input voltage value, load current I
LoadDrop to rated value, SSPC is open-minded fully; In the T7 moment, switch controlling signal CMD sends low level, reference voltage V
RefLinear decline; T8 is load current I constantly
LoadDrop to 0 very soon, SSPC turn-offs, owing to be capacitive load, electric capacity continues discharge, load voltage V
LoadSlowly descend the T9 moment, load voltage V
LoadReduce to 0.
T10～T14 period: T10 moment, switch controlling signal CMD sends high level, reference voltage V
RefLinear rising, load voltage V
LoadTrack reference voltage V
RefThe linear rising; In the T11 moment, load voltage rises to the power input voltage value, and SSPC is open-minded fully; In the T12 moment, switch controlling signal CMD sends low level, reference voltage V
RefLinear decline, load voltage V
LoadTrack reference voltage V
RefLinear decline; The T13 moment, load voltage V
LoadReduce to 0, SSPC turn-offs fully, owing to be inductive load, load current I
LoadDo not drop to 0, load current I this moment
LoadContinue to descend; The T14 moment, load current I
LoadReduce to 0.
Fig. 4 is the physical circuit figure of second embodiment of the invention, and the voltage at this mode voltage feedback circuit feedback SSPC two ends is as feedback signal, and the course of work is following:
1) the ramp voltage reference signal produces circuit: the reference voltage V that produces linear change according to switch controlling signal CMD
Ref, when switch controlling signal CMD provides high level, reference voltage V
RefLinear decline; When switch controlling signal CMD provides low level, reference voltage V
RefThe linear rising.
2) voltage feedback circuit: the power input is connected to the positive input terminal of operational amplifier U4 through resistance R 20; Power Groud is connected to the negative input end of operational amplifier U4 through resistance R 21; With reference to ground, the positive input terminal of U4 connects the output of U4 to the negative input end of U4 through R19 through resistance R 22 connection control circuits.
The SSPC voltage is dwindled corresponding multiple through this difference channel, produces a load voltage feedback signal U
f
3) error regulating circuit: reference voltage V
RefBe connected to the negative input end of operational amplifier U5, voltage feedback signal U through resistance R 17
fBe connected to the positive input terminal of operational amplifier U5 through resistance R 18; One end of resistance R 15 is connected with an end of capacitor C 3; And be connected to the negative input end of U5 jointly; The other end of this capacitor C 3 connects an end of resistance R 16, and the other end of resistance R 15 is connected to the output of U3 with the other end of resistance R 16 jointly.
Load voltage feedback signal U
fWith input reference voltage V
RefRelatively produce error signal, the error regulating circuit amplifies this error signal to be regulated, and produces prime drive signal U
GS1
4) driving power amplifying circuit: accept the prime drive signal U that prime error regulating circuit produces
GS1, it is amplified, produce final driving voltage U
GSThe driving power switching tube.
Foregoing circuit control main power circuit and first instance identical, so repeat no more at this.
Fig. 5 has provided the working timing figure of second embodiment of the invention.The work schedule of its work schedule and first embodiment shown in Figure 3 is basic identical, and difference is CMD when providing high level, reference voltage V
RefLinear decline, when CMD is low level, reference voltage V
RefThe linear rising.So repeat no more at this.
In sum; Although basic structure of the present invention, principle, method are specifically set forth through the foregoing description; Under the prerequisite that does not break away from main idea of the present invention; According to above-described inspiration, those of ordinary skills can not need pay creative work and can implement conversion/alternative form or make up all to fall in the protection range of the present invention.
Claims (4)
1. the power switch tube drives method based on closed-loop control is characterized in that comprising the steps: that the order of opening or turn-off according to switch controlling signal produces the linear ramp voltage reference signal that rises or descend; Introduce a voltage signal as feedback quantity by power take-off; The voltage signal of aforementioned ramp voltage reference signal and introducing is compared the generation error, and it is amplified adjusting generation one drive signal; This drive signal produces driving voltage after amplifying, power switch pipe is driven, and realizes linear rising of the given ramp signal of load voltage or power switch pipe voltage follow or decline.
2. drive system of using the power switch tube drives method based on closed-loop control as claimed in claim 1; It is characterized in that: comprise that the ramp voltage reference signal produces circuit, voltage feedback circuit, error regulating circuit and driving power amplifying circuit; The ramp voltage reference signal produces circuit and produces the linear ramp voltage reference signal that rises or descend according to switch controlling signal, sends into the error regulating circuit as input reference voltage; Voltage feedback circuit produces voltage feedback signal and sends into the error regulating circuit; Said error regulating circuit relatively produces error signal with input reference voltage and voltage feedback signal, and amplifies and regulate back input driving power amplifying circuit; The driving power amplifying circuit produces driving voltage driving power switching tube according to aforementioned input signal.
3. the power switch tube drives system based on closed-loop control as claimed in claim 2; It is characterized in that: said voltage feedback circuit comprises first operational amplifier and 4 resistance; Wherein, The positive input terminal of first operational amplifier connects power take-off via first resistance, and this positive input terminal also connects the output of first operational amplifier via second resistance; The negative input end of said first operational amplifier connects Power Groud via the 3rd resistance, and this negative input end also connects control circuit with reference to ground via the 4th resistance; The output of said first operational amplifier connects the input of error regulating circuit.
4. the power switch tube drives system based on closed-loop control as claimed in claim 2; It is characterized in that: said error regulating circuit comprises second operational amplifier, electric capacity and 4 resistance; Wherein, The positive input terminal of second operational amplifier connects the output that the ramp voltage reference signal produces circuit via the 5th resistance, and negative input end connects the output of voltage feedback circuit via the 6th resistance; One end of said electric capacity is connected with an end of the 7th resistance; And be connected to the negative output terminal of second operational amplifier jointly; The other end of this electric capacity connects an end of the 8th resistance; And the other end of the 8th resistance is connected with the other end of the 7th resistance, is connected to the output of second operational amplifier more jointly; The output of said second operational amplifier also connects the input of driving power amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210014025.8A CN102545855B (en) | 2012-01-17 | 2012-01-17 | Power switch tube drives method and system based on closed loop control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210014025.8A CN102545855B (en) | 2012-01-17 | 2012-01-17 | Power switch tube drives method and system based on closed loop control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102545855A true CN102545855A (en) | 2012-07-04 |
| CN102545855B CN102545855B (en) | 2017-04-05 |
Family
ID=46351935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210014025.8A Expired - Fee Related CN102545855B (en) | 2012-01-17 | 2012-01-17 | Power switch tube drives method and system based on closed loop control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102545855B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014089751A1 (en) * | 2012-12-11 | 2014-06-19 | Qualcomm Incorporated | System and method for suppressing rush current noise in a power switch cell |
| WO2023182100A1 (en) * | 2022-03-24 | 2023-09-28 | ソニーセミコンダクタソリューションズ株式会社 | Display drive circuit and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010030530A1 (en) * | 2000-04-12 | 2001-10-18 | Stmicroelectronics S.A. | Low electrical consumption voltage regulator |
| CN1614882A (en) * | 2003-11-06 | 2005-05-11 | 马维尔国际贸易有限公司 | Class D amplifier |
| CN1667951A (en) * | 2005-03-08 | 2005-09-14 | 南京航空航天大学 | DC solid-state power switch circuit |
| US20060285365A1 (en) * | 2005-06-16 | 2006-12-21 | Active Semiconductors International Inc. | Primary side constant output current controller |
| US20090009147A1 (en) * | 2007-07-03 | 2009-01-08 | Holtek Semiconductor Inc. | Low drop-out voltage regulator with high-performance linear and load regulation |
| US20090080227A1 (en) * | 2007-09-13 | 2009-03-26 | Fuji Electric Device Technology Co., Ltd | Switching power supply |
-
2012
- 2012-01-17 CN CN201210014025.8A patent/CN102545855B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010030530A1 (en) * | 2000-04-12 | 2001-10-18 | Stmicroelectronics S.A. | Low electrical consumption voltage regulator |
| CN1614882A (en) * | 2003-11-06 | 2005-05-11 | 马维尔国际贸易有限公司 | Class D amplifier |
| CN1667951A (en) * | 2005-03-08 | 2005-09-14 | 南京航空航天大学 | DC solid-state power switch circuit |
| US20060285365A1 (en) * | 2005-06-16 | 2006-12-21 | Active Semiconductors International Inc. | Primary side constant output current controller |
| US20090009147A1 (en) * | 2007-07-03 | 2009-01-08 | Holtek Semiconductor Inc. | Low drop-out voltage regulator with high-performance linear and load regulation |
| US20090080227A1 (en) * | 2007-09-13 | 2009-03-26 | Fuji Electric Device Technology Co., Ltd | Switching power supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014089751A1 (en) * | 2012-12-11 | 2014-06-19 | Qualcomm Incorporated | System and method for suppressing rush current noise in a power switch cell |
| WO2023182100A1 (en) * | 2022-03-24 | 2023-09-28 | ソニーセミコンダクタソリューションズ株式会社 | Display drive circuit and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102545855B (en) | 2017-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102208800B (en) | Adaptive insulated gate bipolar transistor (IGBT) series-connection voltage-sharing circuit with overcurrent protection function | |
| CN102790516B (en) | Feedback clamping power metal oxide semiconductor (MOS) pipe drive circuit for power supply management | |
| CN106160428B (en) | A kind of IGBT parallel current-equalizing circuit and control method | |
| CN103795385A (en) | Power tube drive method and circuit, and direct-current solid power controller | |
| CN103269161B (en) | Constant-current output BUCK power circuit | |
| CN103441660A (en) | Direct current power supply slow starting circuit of gateway device | |
| CN101800467B (en) | Protection circuit of switch power supply | |
| CN203827310U (en) | Turn-on drive circuit, turn-off drive circuit and switching circuit for power transistor | |
| CN105471243A (en) | Limitation circuit of starting impact current | |
| CN103841730A (en) | Line voltage compensation circuit used for LED drive | |
| CN104753330A (en) | Soft start method of power management | |
| CN104633225A (en) | Drive and control circuit for fast solenoid valve | |
| CN203747779U (en) | Power tube drive circuit and direct-current solid state power controller | |
| CN102545855A (en) | Power switching tube driving method and system based on closed-loop control | |
| CN102593846A (en) | Zero-voltage-input thyristor-controlled trigger circuit | |
| CN102545852B (en) | Leakage clamping circuit applied to solid-state power controller and control method of leakage clamping circuit | |
| CN102136342B (en) | Circuit for driving electromagnet at high speed | |
| CN203504407U (en) | Igbt drive circuit and electric pressure cooker | |
| CN105262326B (en) | A kind of switch power source output voltage linearly starts control circuit | |
| CN214125140U (en) | MOSFET grid negative feedback active driving circuit | |
| CN103488226B (en) | Output voltage control circuit | |
| CN102801296B (en) | Switching power supply output peak eliminating circuit | |
| CN206146994U (en) | Self -adaption sampling circuit, controller and power supply changeover device | |
| CN102946204B (en) | AC-DC (Alternating Current-Direct Current) regulator and regulating method | |
| CN104218534A (en) | DC-DC switching type circuit with no-load protection and lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170405 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |