CN110212758A - A kind of programme control circut of output multi-channel adjustable voltage - Google Patents
A kind of programme control circut of output multi-channel adjustable voltage Download PDFInfo
- Publication number
- CN110212758A CN110212758A CN201910495879.4A CN201910495879A CN110212758A CN 110212758 A CN110212758 A CN 110212758A CN 201910495879 A CN201910495879 A CN 201910495879A CN 110212758 A CN110212758 A CN 110212758A
- Authority
- CN
- China
- Prior art keywords
- output
- voltage
- vout
- circuit
- programme control
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of programme control circut of output multi-channel adjustable voltage, which includes micro-control unit MCU, boosting and feed circuit, circuit more than one point；Programme control circut passes through boosting and feed circuit first and the DC input voitage of 24VDC boosts, then the DC feedback voltage VFB for the variation that the PWM wave of different duty is converted into, and different output voltage Vout is controlled using the PWM wave of different duty to realize；Output voltage Vout is divided by multiple-channel output by circuit more than one point afterwards and gives LKJ host.The present invention program's it is a technical advantage that: use two sets of identical circuits, by finely tuning feedback resistance size, and the corresponding relationship of PWM wave duty ratio and output valve, it can be thus achieved that the program-controlled output area 25V~138V that reconciles of voltage output range 25V~60V is program-controlled adjustable, meet the colored lights of test LKJ and the requirement of handle operating condition.
Description
Technical field
The present invention relates to the test fixtures of Source of Railway Communication and Signalling field Train Detection and Identification recording device, especially a kind of
The booster circuit of PWM control, the voltage of output multi-channel variation.
Background technique
With the fast development of railway transportation cause, train running speed is continuously improved, to train operation control system
It is required that higher and higher.Currently, Train Detection and Identification recording device (LKJ) has generally been mounted on train, currently used for LKJ system
The test fixture tested of uniting tests complete machine in LKJ factory.
Test fixture needs to provide 16 road colored lights 50V digital outputs to LKJ, and high level range 35V~60V is program-controlled can
It adjusts, low level < 30V, single channel driving current >=5mA；And 14 road handle operating condition 110V digital outputs, high level range 77V
~137.5V is program-controlled adjustable, low level < 60V, single channel driving current >=5mA.But test fixture needs to provide 110VDC to LKJ
Power supply, therefore the body power source of tooling is fixed 110VDC, thus problem is encountered that how on the existing basis 110VDC
On, generate the voltage of Programmable and Variable.
Summary of the invention
The present invention devises a kind of circuit of program-controlled adjustable voltage of output multi-channel for the demand, generates Programmable and Variable
Voltage.
The present invention provides a kind of programme control circut of output multi-channel adjustable voltage, which includes micro-control unit MCU, boosting
And feed circuit, circuit more than one point, 16 road colored lights 50V digital output signals and/or 14 road handle operating condition 110V are provided for LKJ
Digital output signal；
The programme control circut passes through the boosting first and feed circuit boosts the DC input voitage of 24VDC, then will
The DC feedback voltage VFB for the variation that the PWM wave of different duty is converted into, to realize the PWM wave using different duty
Control different output voltage Vout；Finally by the circuit more than one point by the output voltage Vout be divided into multiple-channel output to
LKJ host.
The present invention program's it is a technical advantage that: use two sets identical circuits, by fine tuning feedback resistance size, and
The corresponding relationship of PWM wave duty ratio and output valve, it can realize the program-controlled output model that reconciles of voltage output range 25V~60V
It encloses that 25V~138V is program-controlled adjustable, meets the colored lights of test LKJ and the requirement of handle operating condition.
Detailed description of the invention
Fig. 1 is the boosting and feed circuit schematic diagram that PWM control variation voltage generates
Fig. 2 is the charging principle figure of booster circuit
Fig. 3 is the discharge principle figure of booster circuit
Fig. 4 is the circuit diagram more than one point that variation voltage is divided into multiple-channel output by light MOS
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawing, it will help those skilled in the art further understands
The present invention.
The present embodiment is to generate 16 road colored lights 50V digital outputs, and output area 25V~60V is program-controlled adjustable, and single channel is driven
Illustrate working principle for streaming current >=5mA.Generate 14 road handle operating condition 110V digital outputs, and output area 25V~
138V is program-controlled adjustable, and single channel driving current >=5mA working principle is similar.It is calculated with maximum voltage, required maximum power is
60V*5mA*16+138V*5mA*14=14.46W.Input voltage 24V is 100W, fully meets output power demand.
The present invention program provides a kind of programme control circut of output multi-channel adjustable voltage, which includes boosting and feedback electricity
Road, circuit more than one point.Its working principles are as follows:
DC/DC power module is used first, the body power source 110V (400W) of tooling is converted into 24V voltage (100W), so
Boost boosting principle is utilized afterwards, and by 24VDC dc voltage boost, then variation that the PWM wave of different duty is converted into is straight
Feedback voltage V FB is flowed, different voltage value Vout is exported using the PWM wave control of different duty to realize, finally uses
The control signal of micro-control unit MCU output, controls light metal-oxide-semiconductor, the voltage value is divided into multiple-channel output and gives LKJ host.
Fig. 1 is the boosting and feed circuit schematic diagram that PWM control variation voltage generates comprising by DC power supply 24VDC,
Input capacitance Cin, inductance L1, NMOS tube Q1, diode D1, the booster circuit of output capacitance Cout composition；With by control chip,
Optocoupler, resistance R1, capacitor C1, amplifier IC1, the feed circuit of resistance RF1, RF2 composition.
The power of the DC power supply 24VDC is far longer than output power；Input capacitance Cin is to have certain energy storage capacity
Big electrolytic capacitor, pressure resistance >=50V；Inductance L1 is the big inductance for having certain energy storage capacity, resistance to high current ability；NMOS tube Q1
For high pressure resistant, resistance to high current, the NMOS tube of small conducting resistance；Diode D1 is the diode of high backward voltage resistance, resistance to high current；
Output capacitance Cout is the big electrolytic capacitor for having certain energy storage capacity, pressure resistance >=250V.
The control chip can generate PWM output and be provided simultaneously with feedback function for driving NMOS tube Q1, and above-mentioned anti-
Other components of current feed circuit together, adjust the specific size of output voltage Vout jointly.
The Boost boosting of booster circuit is constantly repeated by charging process and discharge process to realize.Chip is controlled to generate
The PWM wave of 300KHz or so is connected with the grid of NMOS tube Q1, and Q1 is opened between high period, and the hourglass source electrode of NMOS tube communicates；It is low
Q1 is turned off during level, and the hourglass source electrode of NMOS tube is obstructed.
Charging process is as shown in Figure 2: when NMOS tube Q1 is opened, the hourglass source electrode of NMOS tube, which communicates, is equivalent to a conducting wire,
Input 24VDC voltage flows through inductance L1.Diode D1 prevents output capacitance Cout from discharging over the ground.Since input is direct current, institute
It is linearly increasing with certain ratio with the electric current on inductance, some energy are stored as inductive current increases, in inductance.
Discharge process is as shown in Figure 3: when NMOS tube Q1 shutdown, the hourglass source electrode of NMOS tube is obstructed to be equivalent to open circuit, due to
The electric current retention performance of inductance, the electric current for flowing through inductance will not immediately become 0, but value when slowly being finished from charging becomes
0.Inductance L1 begins through diode D1 and charges to output capacitance Cout, and capacitor both end voltage increases, and voltage is already higher than at this time
Input voltage.
The process of this on-off constantly repeats, so that it may obtain the voltage higher than input voltage at the both ends output capacitance Cout
Vout。
And the occurrence of output voltage Vout, it is determined by feed circuit.Pwm signal is defeated by the I/O port of micro-control unit MCU
It out, is that the pwm signal of change in duty cycle of a 10KHz is converted into the change in duty cycle of reverse phase after light-coupled isolation
Pwm signal.Using the DC voltage for being converted into variation after resistance R1 and capacitor C1, the DC voltage minimum 0V, highest 5V.Institute
DC voltage is stated in conjunction with amplifier IC1, is connected with the centre of feedback resistance RF1 and RF2.
Feedback voltage V FB is the partial pressure value that output voltage Vout passes through feedback regulation resistance RF1 and RF2, and pwm signal turns
The DC voltage value (capacitor C1 both end voltage value) changed into is i.e. equal with VFB, and
VFB=5V* duty ratio (%)
Duty ratio in formula is the PWM wave of MCU output by the duty ratio after optocoupler reverse phase, due to duty ratio minimum
It is 0%, is up to 100%, therefore the minimum 0V of VFB, is up to 5V.For design margin, try not to select < 5% and >
95% duty ratio.Design the resistance value of RF1 and RF2, so that it may obtain the Vout changed in demand.
Vout=(1+RF1/RF2) * VFB
Such as RF1=55K, RF2=3.9K are chosen, following table lists the relationship of a part of Vout and duty ratio:
| Duty ratio after optocoupler reverse phase | VFB | Vout |
| 33% | 1.65V | 25V |
| 40% | 2V | 30V |
| 52% | 2.6V | 40V |
| 66% | 3.3V | 50V |
| 80% | 4V | 60V |
Duty ratio of the PWM after optocoupler exported due to the I/O port of MCU can reverse phase, thus see, design MCU output
PWM wave duty ratio is between 67%~20%, so that it may obtain output voltage Vout and change between 25V~60V.
Similarly, output voltage is needed to change between 25V~138V, it is only necessary to the resistance value of RF1 and RF2 are redesigned, with
And the duty ratio of corresponding PWM wave.
Circuit function in Fig. 4 is that the variation voltage Vout of Fig. 1 is divided into multiple-channel output.The circuit more than one point is by microcontroller
Unit MCU, level conversion, decoder, latch 1,2 and light MOS group composition.
3 road address signals and 8 circuit-switched data signals are first exported by MCU, signal low level is 0V, high level 3.3V；Through electricity
After pressing conversion chip conversion, low level 0V, high level 5V；3 road address signals are connected with the input of decoder, 8 circuit-switched datas
The input terminal of signal latch 1,2 is connected, and the input of all latch is all parallel with one another.
At least part output of decoder and the latch end of latch are connected one to one by phase inverter, due to decoding
The output of device every time one and only one be low level, therefore latch 1,2 is in one and only one latch energy of synchronization
It is opened.Data can be transmitted to output end from input terminal by the latch being opened, the input control end phase with 8 groups of light MOS
Even, to control being switched on and off for light MOS.
The output both ends of light MOS are equivalent to a switch, when the input control end of light MOS is low level 0V, output two
It holds obstructed；When the input control end of light MOS is high level 5V, output both ends are communicated.
Wherein one end that light MOS1~16 is exported is all in parallel and is connected with Vout, and the other end of output and LKJ's is more
The input terminal of road desired signal is connected, respectively Vout1~16, voltage value by light MOS input control end voltage and Vout
Voltage value determines: when the input control signal of light MOS is low level 0V, Voutx (x=1~16) is 0V；It is defeated as light MOS
Enter to control signal be high level 5V when, Voutx=Vout.The high-voltage signal of Fig. 1 variation generated can be thus divided into more
LKJ device is given in routing program control output.
The present invention program's it is a technical advantage that:
The present invention utilizes a kind of booster circuit of PWM control, exports the voltage of program-controlled adjustable multichannel variation.Using similar
Principle, by adjust RF1 and RF2 resistance value and corresponding PWM wave duty ratio, output area 25V can be provided respectively
~60V is program-controlled to reconcile the program-controlled adjustable plurality of voltages of output area 25V~138V, can also be with output multi-channel fixed voltage.?
In the relatively simple test fixture of power supply, the voltage of energy output multi-channel variation meets a variety of demands of LKJ test.
The foregoing is merely the preferable case study on implementation of this new departure, are not intended to limit the protection model of this new departure
It encloses.All any modification, equivalent replacement, improvement and so within the spirit and principle of this new departure, it is new to should be included in this
Within the protection scope of scheme.
Claims (10)
1. a kind of programme control circut of output multi-channel adjustable voltage, the circuit include micro-control unit MCU, boosting and feed circuit,
Circuit more than one point provides 16 road colored lights 50V digital output signals and/or 14 road handle operating condition 110V digital outputs for LKJ
Signal；
The programme control circut passes through the boosting first and feed circuit boosts the DC input voitage of 24VDC, then will be different
The DC feedback voltage VFB for the variation that the PWM wave of duty ratio is converted into, to realize the PWM wave control using different duty
Different output voltage Vout；The output voltage Vout is divided into multiple-channel output to LKJ finally by the circuit more than one point
Host.
2. programme control circut according to claim 1, which is characterized in that it is described boosting and feed circuit include by DC power supply
The booster circuit that 24VDC, input capacitance Cin, inductance L1, NMOS tube Q1, diode D1, output capacitance Cout are formed, and by controlling
Coremaking piece, optocoupler, resistance R1, capacitor C1, amplifier IC1, the feed circuit of resistance (RF1, RF2) composition.
3. programme control circut according to claim 2, which is characterized in that the booster circuit is by charging process and discharges
Journey constantly repeats, and can obtain the voltage Vout higher than the input voltage at the both ends output capacitance Cout.
4. programme control circut according to claim 3, which is characterized in that the control chip can generate PWM output, for driving
Dynamic NMOS tube Q1, is provided simultaneously with feedback function, together with other components of above-mentioned feed circuit, adjusts output voltage jointly
The specific size of Vout.
5. programme control circut according to claim 1, which is characterized in that the PWM wave is defeated by the I/O port of micro-control unit MCU
Out, it is the pwm signal of a change in duty cycle, after light-coupled isolation, is converted into the pwm signal of the change in duty cycle of reverse phase.
6. programme control circut according to claim 5, which is characterized in that the pwm signal of above-mentioned reverse phase using resistance R1 and
The DC voltage of variation, the minimum 0V of the DC voltage, highest 5V, the DC voltage are converted into after the RC circuit that capacitor C1 is constituted
It is connected in conjunction with amplifier IC1, and with the centre of feedback resistance RF1 and RF2,
The feedback voltage V FB is the partial pressure value that output voltage Vout passes through feedback regulation resistance RF1 and RF2, and through pwm signal
The DC voltage being converted into is equal with VFB, and meets
VFB=5V* duty ratio,
Vout=(1+RF1/RF2) * VFB, wherein duty ratio is the PWM wave of MCU output by the duty after optocoupler reverse phase
Than.
7. programme control circut according to claim 6, which is characterized in that the resistance value of RF1 and RF2 need only be designed, and corresponding
Reverse phase after the duty ratio of PWM wave required output voltage Vout can be obtained.
8. programme control circut according to claim 1, which is characterized in that the circuit more than one point include micro-control unit MCU,
Level conversion, decoder, latch (1,2) and light MOS group,
The output both ends of light MOS group are equivalent to a switch, when the input control end of each smooth MOS is low level 0V, output two
It holds obstructed, exports as 0V；When the input control end of each smooth MOS is high level 5V, output both ends are communicated, and output voltage is
Vout。
9. programme control circut according to claim 8, which is characterized in that wherein one end of each smooth MOS output is all in parallel, and
And be connected with Vout, and the other end exported is connected with the input terminal of LKJ multichannel desired signal, voltage value is defeated by light MOS's
Enter control terminal voltage and Vout voltage value determines, so that the high-voltage signal Vout of variation is divided into the output of multirouting process control
Give LKJ device.
10. programme control circut according to claim 1, which is characterized in that use two sets of identical circuits, fed back by fine tuning
The corresponding relationship of resistance sizes and PWM wave duty ratio and output valve, it can realize that voltage output range 25V~60V is program-controlled
Output area 25V~the 138V that can reconcile is program-controlled adjustable, while meeting the colored lights of test LKJ and the requirement of handle operating condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910495879.4A CN110212758B (en) | 2019-06-06 | 2019-06-06 | Program control circuit for outputting multi-path adjustable voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910495879.4A CN110212758B (en) | 2019-06-06 | 2019-06-06 | Program control circuit for outputting multi-path adjustable voltage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110212758A true CN110212758A (en) | 2019-09-06 |
| CN110212758B CN110212758B (en) | 2021-05-28 |
Family
ID=67791664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910495879.4A Active CN110212758B (en) | 2019-06-06 | 2019-06-06 | Program control circuit for outputting multi-path adjustable voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110212758B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111210779A (en) * | 2020-01-08 | 2020-05-29 | 昆山龙腾光电股份有限公司 | Liquid crystal module and driving method |
| CN111554235A (en) * | 2020-05-28 | 2020-08-18 | 广东美的厨房电器制造有限公司 | Boost circuit, display device and household appliance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5541935A (en) * | 1995-05-26 | 1996-07-30 | National Semiconductor Corporation | Integrated circuit with test signal buses and test control circuits |
| CN101162868A (en) * | 2006-10-13 | 2008-04-16 | 深圳迈瑞生物医疗电子股份有限公司 | Converter with continuously adjustable output |
| CN106018429A (en) * | 2016-07-07 | 2016-10-12 | 福州觉感视觉软件科技有限公司 | High-speed presswork online quality detection system and method |
| CN106354678A (en) * | 2016-08-25 | 2017-01-25 | 北京交大思诺科技股份有限公司 | Digital input and output expansion device and method of testing tooling |
| CN106485979A (en) * | 2016-12-29 | 2017-03-08 | 河南新思维自动化设备有限公司 | LKJ dimension inspection Integrated Teaching training system |
| CN108990197A (en) * | 2017-06-02 | 2018-12-11 | 江苏万邦微电子有限公司 | A kind of power-supply management system for the LED light that two column of control are in parallel |
-
2019
- 2019-06-06 CN CN201910495879.4A patent/CN110212758B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5541935A (en) * | 1995-05-26 | 1996-07-30 | National Semiconductor Corporation | Integrated circuit with test signal buses and test control circuits |
| CN101162868A (en) * | 2006-10-13 | 2008-04-16 | 深圳迈瑞生物医疗电子股份有限公司 | Converter with continuously adjustable output |
| CN106018429A (en) * | 2016-07-07 | 2016-10-12 | 福州觉感视觉软件科技有限公司 | High-speed presswork online quality detection system and method |
| CN106354678A (en) * | 2016-08-25 | 2017-01-25 | 北京交大思诺科技股份有限公司 | Digital input and output expansion device and method of testing tooling |
| CN106485979A (en) * | 2016-12-29 | 2017-03-08 | 河南新思维自动化设备有限公司 | LKJ dimension inspection Integrated Teaching training system |
| CN108990197A (en) * | 2017-06-02 | 2018-12-11 | 江苏万邦微电子有限公司 | A kind of power-supply management system for the LED light that two column of control are in parallel |
Non-Patent Citations (1)
| Title |
|---|
| 葛学仁: "车载设备综合仿真检测（培训）***设计", 《中国新技术新产品》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111210779A (en) * | 2020-01-08 | 2020-05-29 | 昆山龙腾光电股份有限公司 | Liquid crystal module and driving method |
| CN111210779B (en) * | 2020-01-08 | 2022-05-17 | 昆山龙腾光电股份有限公司 | Liquid crystal module and driving method |
| CN111554235A (en) * | 2020-05-28 | 2020-08-18 | 广东美的厨房电器制造有限公司 | Boost circuit, display device and household appliance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110212758B (en) | 2021-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8488340B2 (en) | Power converter with boost-buck-buck configuration utilizing an intermediate power regulating circuit | |
| CN101779173B (en) | Time-multiplexed multi-output dc/dc converters and voltage regulators | |
| CN107112894A (en) | Power converter | |
| CN101478243B (en) | Switch electric power circuit with wide inputting range | |
| CN111884513B (en) | Control circuit applied to power adapter and power adapter | |
| CN104838571B (en) | Flyback converter circuit for operating very low input | |
| CN203554299U (en) | High-voltage input flyback switching power supply | |
| CN101588135A (en) | Resonant power factor correction converter | |
| CN102005923A (en) | Power supply controller with an input voltage compensation circuit | |
| WO2006003751A1 (en) | Dc-dc converter and converter device | |
| CN103051220B (en) | Switching Power Supply and controller thereof | |
| CN205142002U (en) | Switching power supply from supply circuit | |
| CN103703867A (en) | Voltage supply arrangement and method for supplying voltage to an electrical load with transistor saturation regulation | |
| CN110165888A (en) | Three level Boost circuits, multiple-channel output parallel system | |
| CN110212758A (en) | A kind of programme control circut of output multi-channel adjustable voltage | |
| CN110707938A (en) | High-transformation-ratio bidirectional DC/DC converter based on coupling inductor | |
| CN101471603A (en) | DC-DC decompression converter and ripple improving circuit | |
| CN113783428A (en) | Mixed-mode boost converter | |
| CN105226945A (en) | Boost chip | |
| CN203086362U (en) | Switching power supply and controller thereof | |
| DE112012006360T5 (en) | DC power supply circuit | |
| CN102790520A (en) | Bilateral soft start control method for bidirectional DC-DC (direct current-to-direct current) converter for new energy power generation systems | |
| CN102522903B (en) | Switch-type multi-power supply management circuit | |
| CN106253673B (en) | A kind of D. C-D. C voltage converter | |
| CN102420535B (en) | Switching type multi-power management circuit with extremely low power consumption |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |