CN208353215U - SCM Based digitlization circuit of power factor correction - Google Patents
SCM Based digitlization circuit of power factor correction Download PDFInfo
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- CN208353215U CN208353215U CN201820631146.XU CN201820631146U CN208353215U CN 208353215 U CN208353215 U CN 208353215U CN 201820631146 U CN201820631146 U CN 201820631146U CN 208353215 U CN208353215 U CN 208353215U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model provides SCM Based digitlization circuit of power factor correction, the circuit of power factor correction being connected to including both ends on input terminal and output end, the governor circuit being connect with circuit of power factor correction, the circuit of power factor correction includes the auto-transformer being sequentially connected electrically, rectifier and BOOST booster circuit, the input terminal is connected on auto-transformer, the output end is connected on BOOST booster circuit, the governor circuit includes single machine unit, the voltage and current acquisition module being connected in single machine unit, drive module and measure voltage & it is able to solve existing circuit of power factor correction low-frequency vibration, the problem of circuit complexity, and it is insensitive to external disturbance, system upgrade easy to accomplish, it is adaptable, Function Extension is convenient, it can be realized more complicated Control algolithm.
Description
Technical field
The utility model relates to power factor correction technology field more particularly to SCM Based digitlization power factors
Correcting circuit.
Background technique
Due to needing DC voltage source in many applications, a rectifier with capacitive filter is necessary.
However, this will lead to interrupted, of short duration current spike.When main power source exports such electric current, electric current and voltage it
Between phase difference will cause exchange power loss, resulting circuit loss, total harmonic distortion and radiation interference will all be shown
It writes and increases.In application of the power grade greater than 500 watts, these problems seem especially prominent, just pfc circuit are needed to improve at this time
Power factor.Present pfc circuit is divided to active-mode active PFC and two kinds of passive PFC.Passive type generally uses inductance to mend
Phase difference, which reduces, between the fundamental current and voltage that compensation method inputs exchange carrys out increase power factor, and power factor can only achieve
0.7~0.8, structure is simple but heavy, and work with low-frequency vibration and causes low frequency noise often；It is active by high-frequency inductor,
The elements such as switching tube and capacitor constitute, be step-up switching power supply circuit, have it is small in size, it is light-weight, pass through application-specific integrated circuit example
UCC28019 chip removes the waveform of adjustment electric current, compensates between the phase difference Current Voltage, and usually reachable 98% or more, line
Wave very little, but circuit is complicated, and cost is much higher compared with passive PFC.
Summary of the invention
The technical problem to be solved by the utility model is to provide SCM Based digitlization PFC electricity
Road is able to solve the problem of existing circuit of power factor correction low-frequency vibration, circuit complexity, and unwise to external disturbance
Sense, system upgrade easy to accomplish is adaptable, and Function Extension is convenient, can be realized more complicated control algolithm.
In order to solve the above-mentioned prior art problems, the utility model uses following scheme: SCM Based digitlization function
Rate factor correcting circuit, be connected to including both ends circuit of power factor correction on input terminal and output end, with power because
The governor circuit of number correcting circuit connection, the circuit of power factor correction include the auto-transformer being sequentially connected electrically, rectification
Device and BOOST booster circuit, the input terminal are connected on auto-transformer, and the output end is connected to BOOST booster circuit
On, the governor circuit include single machine unit, the voltage and current acquisition module being connected in single machine unit, drive module and
Measure voltage &, the voltage and current acquisition module are connected to the both ends of auto-transformer, the drive module connection
On BOOST booster circuit, the measure voltage & connection is on the output.
Preferably, being also connected with key, serial ports screen and power circuit in the single machine unit.
Preferably, in the circuit of the rectifier, the 1st pin of a relay termination of P1 terminal, the 2nd of relay the
Pin connects one end of current transformer terminal, the ac input end of another termination D1 rectifier bridge of current transformer terminal, and D1 is whole
Flow the other end of another ac input end connection P1 terminal of bridge, the CIN filter capacitor of voltage transformer terminal and 0.47 μ F
Two ac input ends of D1 rectifier bridge are connect, P2 terminal connects the 4th pin and the 5th pin of relay, the C1 filtering of 0.33 μ F
Capacitor and P4 terminal connect the direct-flow input end of D1 rectifier bridge.
Preferably, in the BOOST booster circuit, P5 terminal and input voltage measurement terminal latter termination L1 electricity in parallel
Sense, the anode of another termination D5 backward dioded of L1 inductance and the drain electrode of Q1 switching tube；Source electrode passes through the R5 of 20 milliohms
It being grounded after resistance, P6 terminal connects the both ends of R5 resistance, it is connected between R2 resistance, R3 resistance by the grid of Q1 power switch tube,
P10 terminal connects one end of R2 resistance, and the other end and R3 resistance of P10 terminal are grounded jointly；The R4 of ground wire one 20 milliohm of series connection
Resistance, R4 resistance two terminate input electric cur- rent measure terminal；The input terminal of one termination L1 inductance of D6 backward dioded, D6 reversed two
The cathode of another termination D5 backward dioded of pole pipe, after P7 terminal is in parallel with output voltage detection terminal, one end of P7 terminal
It is connected with the R1 resistance of 20 milliohms, R1 resistance both ends are electrically connected output electric current measure terminal；Capacitor C17, capacitor C19, capacitor C20 point
Both ends not with P7 terminal are electrically connected.
Preferably, the voltage and current acquisition module includes AC current collecting and AC voltage sampling, alternating current
Acquisition uses ACS712 chip, and the circuit after the port IP+, IP- series connection access auto-transformer, VCC, GND are directly accessed 0.1 μ
The C2 filter capacitor of F, the end FILTER be directly accessed the C1 capacitor of a 1nF, wherein VCC and GND are mentioned by power circuit
For；AC voltage sampling uses AD8656 chip, and AD8656 chip includes two amplifiers of A, B, after R5 resistance and R6 resistance are connected
One terminates VCC, another termination GND, and midpoint meets the IN+ of B amplifier, and IN- is connect by R7 resistance with OUT, and the output of B amplifier passes through again
It crosses R3 resistance to be connected with the IN+ of A amplifier, C2 filter capacitor is connected with the positive input terminal of A amplifier, other end ground connection, R1 resistance, R2
One end of resistance connects IN+, IN- of A amplifier, another termination signal respectively；The reverse input end of A amplifier R4 electricity in parallel with output end
Resistance and C1 capacitor, VCC, GND are provided by power circuit.
Preferably, the drive module includes the triode of three NPN types, IN terminates the base stage into Q4 triode, together
Shi Shangla R32 resistance one terminates 3.3V, the base stage of a termination Q4 triode, and R33 resistance connects the base stage and transmitting of Q4 triode
Pole, collector connection Q3 triode, Q5 triode base stage and be connected with one end of R34 resistance, another termination of R34 resistance
15V；The transmitting base of Q3 triode is connected with the collector of Q5 triode, while output end of the node as OUT, Q5 triode
The transmitting base of transmitting base and Q4 triode is grounded jointly, and 15V, GND are provided by power circuit.
Preferably, the measure voltage & carries out DC voltage acquisition, direct current using directly partial pressure mode
Stream acquisition uses INA282 chip, and+IN ,-IN terminal connect the R1 resistance in 10 Europe, R2 resistance respectively, R1 resistance and R2 resistance it is another
+ IN ,-the IN pin of one chip termination, R1 resistance, R2 resistance both ends are mutually coupled respectively the C13 capacitor of 0.1 μ F, C14 electricity again
Hold；GND, REF1, REF2 pin are grounded respectively, and V+ pin connects 5V voltage, and the C12 filtering of a 0.1 μ F is accessed between 5V and ground
Capacitor, OUT pin access the R34 resistance of a 1K, and wherein 5V, GND are provided by power circuit.
The utility model has the advantages that
The utility model provides SCM Based digitlization circuit of power factor correction by adopting the above technical scheme, uses
Have bridge Boost PFC can be applied to it is all can use tradition Boost pfc circuit occasions, it can realization power factor
Stable output voltage is provided for load while calibration function, final power factor (PF) reaches 99.9%, needs function various
It has a good application prospect in the AC/DC converting means of rate factor correcting function；It is able to solve existing PFC
The problem of circuit low-frequency vibration, circuit complexity has circuit structure simple, easy to accomplish system liter insensitive to external disturbance
The advantages of grade, adaptable, Function Extension is convenient, is able to achieve more complicated control algolithm.
Detailed description of the invention
Fig. 1 is the electrical schematic diagram of the utility model；
Fig. 2 is the rectifier circuit figure in the utility model；
Fig. 3 is the BOOST booster circuit figure in the utility model；
Fig. 4 is the STM32F3 single machine unit block diagram in the utility model；
Fig. 5 is the DC current Acquisition Circuit figure in the utility model；
Fig. 6 is the AC current collecting circuit diagram in the utility model；
Fig. 7 is the AC voltage sampling circuit diagram in the utility model；
Fig. 8 is the drive module circuit diagram in the utility model；
Fig. 9 is the 5V power circuit in the utility model；
Figure 10 is the 15V power circuit in the utility model.
Specific embodiment
As shown in Figures 1 to 10, SCM Based digitlization circuit of power factor correction, including both ends are connected to
Input terminal 21 and circuit of power factor correction on output end 22, the governor circuit being connect with circuit of power factor correction, it is described
Circuit of power factor correction includes the auto-transformer 2, rectifier 4 and BOOST booster circuit 6 being sequentially connected electrically, the input
End 21 is connected on auto-transformer 2, and the output end 22 is connected on BOOST booster circuit 6, and the governor circuit includes single
Piece machine unit 1, the voltage and current acquisition module 3 being connected in single machine unit 1, drive module 5 and measure voltage &
7, the voltage and current acquisition module 3 is connected to the both ends of auto-transformer 2, and the drive module 5 is connected to BOOST boosting
On circuit 6, the measure voltage & 7 is connected on output end 22.Be also connected in the single machine unit 1 key 8,
Serial ports screen 9 and power circuit 10.The governor circuit is using STM32F303VET6 chip as microcontroller, the chip clock
Frequency is up to 72MHz, there is 44/IO mouthfuls, and 15 timers, interface type has CAN, I2C, I2S, SPI, UART, USART,
USB is used for multichannel communication multiple telecommunication, and four road ADC0.20 μ s have 39 channels, can acquire Current Voltage simultaneously, interior band analog comparator, and 12
A dma controller, DMA storage keep data conversion quicker；Serial ports screen 8 can show input voltage, input current, output electricity
The data such as pressure, output electric current, efficiency；Key 9 can realize step by step modulating output voltage.
In the circuit of the rectifier 4, the 2nd pin of the 1st pin of a relay termination of P1 terminal, relay is connect
One end of current transformer terminal, the ac input end of another termination D1 rectifier bridge of current transformer terminal, D1 rectifier bridge
It is whole that the CIN filter capacitor of the other end of another ac input end connection P1 terminal, voltage transformer terminal and 0.47 μ F meet D1
Flow bridge two ac input ends, P2 terminal connect relay the 4th pin and the 5th pin, the C1 filter capacitor of 0.33 μ F and
P4 terminal connects the direct-flow input end of D1 rectifier bridge.After 220 volts of alternating currents are changed into 24V alternating current by auto-transformer 2, access whole
Flow device 4, at pulsating direct current, while voltage and current collection point is arranged in AC rectification by rectifier bridge and C1 capacitor before rectification.
In the BOOST booster circuit 6, P5 terminal and input voltage measurement terminal latter termination L1 inductance in parallel, L1 electricity
The anode of another termination D5 backward dioded of sense and the drain electrode of Q1 switching tube；Source electrode is followed by by the R5 resistance of 20 milliohms
Ground, P6 terminal connect the both ends of R5 resistance, are connected between R2 resistance, R3 resistance by the grid of Q1 power switch tube, P10 terminal connects
One end of R2 resistance, the other end and R3 resistance of P10 terminal are grounded jointly；The R4 resistance of ground wire one 20 milliohm of series connection, R4 electricity
Two termination input electric cur- rent measure terminal of resistance；D6 backward dioded one termination L1 inductance input terminal, D6 backward dioded it is another
The cathode of one termination D5 backward dioded, after P7 terminal is in parallel with output voltage detection terminal, one end of P7 terminal and 20 milliohms
R1 resistance be connected, R1 resistance both ends are electrically connected output electric current measure terminal；Capacitor C17, capacitor C19, capacitor C20 respectively with P7
The both ends of terminal are electrically connected.Working principle: the conducting and cut-off of Q1 switching tube are controlled by the PWM wave of single-chip microcontroller generation, works as conducting
When, it is to switch suitable conducting wire, at this moment, input voltage flows through inductance, and D5 diode prevents C20 capacitor from putting over the ground in charging process
Electricity.Since input is direct current, so the electric current on L1 inductance is linearly increasing with certain ratio, this ratio is with inductance size
It is related.As inductive current increases, some energy are stored in L1 inductance.When turned off, since the electric current of L1 inductance keeps special
Property, the electric current for flowing through L1 inductance will not immediately become 0, but value when slowly being finished from charging becomes 0, and original circuit
It has been disconnected that, then L1 inductance can only be discharged by novel circuit, i.e., inductance starts to give C20 capacitor charging, and capacitor both end voltage increases,
Voltage is higher than input voltage at this time；TIMER3 is triggered by ac voltage of the internal comparator to acquisition, while passing through acquisition
Output voltage values, inductor current value and the output voltage values of reference are calculated down by the reference AC current values that sine table calculates
The duty ratio at moment makes AC current waveform follow alternating voltage waveform, and power factor is made to reach 99.9%.
The voltage and current acquisition module 3 includes AC current collecting and AC voltage sampling, and AC current collecting uses
ACS712 chip, the series connection of the port IP+, IP- access the circuit after auto-transformer 2, and VCC, GND are directly accessed the C2 filter of 0.1 μ F
Wave capacitor, the end FILTER and ground are directly accessed the C1 capacitor of a 1nF, and wherein VCC and GND is provided by power circuit 10, work
Principle: ACS712IC feature is the linear current sensing IC based on Hall effect, the electricity that can be applied by the copper current path
Stream, which can generate, can be integrated the magnetic field that Hall IC incudes and is converted into proportional voltage, by passing magnetic signal close to Hall
Sensor realizes the optimization of device accuracy, and when the main copper current path by being used as current sense access, draws from the 1st
Foot and the 2nd pin 2, when constantly rising to the electric current of the 3rd pin and the 4th pin, the output of device has positive slope.According to data
Current value x (unit: A) relationship that handbook obtains voltage value y (unit: V) and passes through are as follows: y=0.1875*x+2.5.
AC voltage sampling uses AD8656 chip, and AD8656 chip includes two amplifiers of A, B, R5 resistance and R6 resistance
Connect latter termination VCC, another termination GND, and midpoint meets the IN+ of B amplifier, and IN- is connect by R7 resistance with OUT, B amplifier
Output is connected by R3 resistance with the IN+ of A amplifier again, and C2 filter capacitor is connected with the positive input terminal of A amplifier, other end ground connection,
R1 resistance, R2 resistance one end connect IN+, IN- of A amplifier, another termination signal respectively；The reverse input end of A amplifier and output
End parallel connection R4 resistance and C1 capacitor, VCC, GND are provided by power circuit 10, and AD8656 operational amplifier circuit can by change resistance value
With change amplification or (or reducing) multiple and change bias voltage.Acquisition for alternating voltage can export the OUT of B amplifier
The voltage of 2.5V, the circuit of A amplifier are 1 times of amplifying circuit, and then by the+IN of 2.5V access amplifier A, while+the IN of amplifier A is logical
The output end of a resistance access mutual inductor is crossed, so that the OUT output of A amplifier has the original signal of 2.5V bias voltage, mainly
It is to be acquired for the ease of single machine unit 1, because the signal of mutual inductor output is the sinusoidal signal with negative value, and single-chip microcontroller list
Member 1 cannot acquire negative voltage.
The drive module 5 includes the triode of three NPN types, and IN terminates the base stage into Q4 triode, while pulling up R32
Resistance one terminates 3.3V, the base stage of a termination Q4 triode, and R33 resistance connects the base stage and emitter of Q4 triode, collector
Connection Q3 triode, Q5 triode base stage and be connected with one end of R34 resistance, another termination 15V of R34 resistance；Q3 triode
Transmitting base be connected with the collector of Q5 triode, while output end of the node as OUT, the transmitting base and Q4 tri- of Q5 triode
The transmitting base of pole pipe is grounded jointly, and 15V, GND are provided by power circuit 10.The pwm signal control Q1 that single machine unit 1 exports is opened
The impulse wave for closing the switch of pipe to control Q2 triode, Q3 triode makes OUT output end export peak value 15V.
The measure voltage & 7 carries out DC voltage acquisition using directly partial pressure mode, and DC current is adopted
With INA282 chip ,+IN ,-IN terminal connect the R1 resistance in 10 Europe, R2 resistance, another termination core of R1 resistance and R2 resistance respectively
+ IN ,-the IN pin of piece, R1 resistance, R2 resistance both ends are mutually coupled respectively the C13 capacitor of 0.1 μ F, C14 capacitor again；GND,
REF1, REF2 pin are grounded respectively, and V+ pin connects 5V voltage, and the C12 filter capacitor of a 0.1 μ F is accessed between 5V and ground,
OUT pin accesses the R34 resistance of a 1K, and wherein 5V, GND are provided by power circuit 10.Working principle: the output of INA282
There are three types of i.e. unidirectional output, bidirectional output, outside reference outputs for type.Unidirectional output (REF1 and REF2 is connected to simultaneously ground or
The end V+) the output voltage values increase linear with the increase of electric current or smaller, the circuit that this system uses for unidirectional output,
The sampling resistor that 20 milliohms are accessed between chip+IN ,-IN, will obtain the voltage with electric current linear increase, single machine unit
1 ADC is by detection voltage value come counting circuit size of current.
Connection in the utility model between each module is as follows: the 24V exchange that auto-transformer 2 is converted is electrically accessed Fig. 2's
The port the P5 Electricity Federation of the port P1, the port P4 and Fig. 3, then the port P7 is connected with load；Wherein the port P2 of Fig. 2 and relay drive
It is dynamic to be connected, wherein the pin of control relay driving and the relay pin phase Electricity Federation of Fig. 4 single machine unit 1, voltage transformer end
Mouth is connected with-the IN of Fig. 7 ,+IN, and the PA1 pin of OUT and Fig. 4 single machine unit 1 of Fig. 7 is connected, and current transformer terminal connects
Enter IP-, IP+ of Fig. 6, the ADC1 pin of 4 single machine unit 1 of OUT map interlinking of Fig. 6, the P10 terminal of Fig. 3 and the OUT of Fig. 8 and
GND phase Electricity Federation, PWM pin of the IN and GND of Fig. 8 with Fig. 4 single machine unit 1, GND phase Electricity Federation, the input voltage measurement of Fig. 3
Terminal is connected by the direct bleeder circuit of 1:12 with the ADC2 pin of Fig. 4 single machine unit 1, and input electric cur- rent measure terminal is suitable
Current direction be connected with+the IN of Fig. 5 ,-IN, the then ADC2 pin of 4 single machine unit 1 of OUT pin map interlinking of Fig. 5, inductance
Current sense terminal and output electric current measure terminal access other two panels as shown in Figure 5 as input electric cur- rent measure terminal
+ the IN ,-IN of INA282, OUT pin distinguish ADC3, ADC4 pin of 4 single machine unit 1 of map interlinking, the output voltage detection of Fig. 3
Terminal is connected by the direct bleeder circuit of another 1:12 with the PA2 pin of Fig. 4 single machine unit 1, serial ports screen 9 and Fig. 4
The TXD/RXD pin of single machine unit 1 is connected, and KEY0 to the KEY4 of key 8 successively connects the PE0-PE4 pin of single machine unit 1.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (7)
1. SCM Based digitlization circuit of power factor correction, it is characterised in that: be connected to input terminal including both ends
(21) and the circuit of power factor correction on output end (22), the governor circuit that is connect with circuit of power factor correction, the function
Rate factor correcting circuit includes the auto-transformer (2), rectifier (4) and BOOST booster circuit (6) being sequentially connected electrically, described
Input terminal (21) is connected on auto-transformer (2), and the output end (22) is connected on BOOST booster circuit (6), the master
Controlling circuit includes single machine unit (1), the voltage and current acquisition module (3) being connected on single machine unit (1), drive module
(5) and measure voltage & (7), the voltage and current acquisition module (3) are connected to the both ends of auto-transformer (2), institute
It states drive module (5) to be connected on BOOST booster circuit (6), the measure voltage & (7) is connected to output end (22)
On.
2. SCM Based digitlization circuit of power factor correction according to claim 1, it is characterised in that: the list
Key (8), serial ports screen (9) and power circuit (10) are also connected on piece machine unit (1).
3. SCM Based digitlization circuit of power factor correction according to claim 2, it is characterised in that: described whole
In the circuit for flowing device (4), the 2nd pin of the 1st pin of a relay termination of P1 terminal, relay connects current transformer terminal
One end, the ac input end of another termination D1 rectifier bridge of current transformer terminal, D1 rectifier bridge another exchange input
The CIN filter capacitor of the other end of end connection P1 terminal, voltage transformer terminal and 0.47 μ F connect two exchanges of D1 rectifier bridge
Input terminal, P2 terminal connect the 4th pin and the 5th pin of relay, and the C1 filter capacitor and P4 terminal of 0.33 μ F connects D1 rectification
The direct-flow input end of bridge.
4. SCM Based digitlization circuit of power factor correction according to claim 3, it is characterised in that: described
In BOOST booster circuit (6), P5 terminal and input voltage measurement terminal latter termination L1 inductance in parallel, the other end of L1 inductance
Connect anode and the drain electrode of Q1 switching tube of D5 backward dioded；It is grounded after the R5 resistance that source electrode passes through 20 milliohms, P6 terminal
The both ends of R5 resistance are connect, are connected between R2 resistance, R3 resistance by the grid of Q1 power switch tube, P10 terminal connects R2 resistance
One end, the other end and R3 resistance of P10 terminal are grounded jointly；The R4 resistance of ground wire one 20 milliohm of series connection, R4 resistance two terminate
Input electric cur- rent measure terminal；The input terminal of one termination L1 inductance of D6 backward dioded, another termination D5 of D6 backward dioded
The cathode of backward dioded, after P7 terminal is in parallel with output voltage detection terminal, the R1 resistance of one end of P7 terminal and 20 milliohms
It is connected, R1 resistance both ends are electrically connected output electric current measure terminal；The both ends with P7 terminal respectively capacitor C17, capacitor C19, capacitor C20
It is electrically connected.
5. SCM Based digitlization circuit of power factor correction according to claim 4, it is characterised in that: the electricity
Current voltage acquisition module (3) includes AC current collecting and AC voltage sampling, and AC current collecting uses ACS712 chip, IP
+, the circuit after the port IP- series connection access auto-transformer (2), VCC, GND be directly accessed the C2 filter capacitor of 0.1 μ F,
The end FILTER and ground are directly accessed the C1 capacitor of a 1nF, and wherein VCC and GND is by power circuit (10) offer；Alternating voltage is adopted
Collection uses AD8656 chip, and AD8656 chip includes two amplifiers of A, B, and R5 resistance and R6 resistance are connected latter termination VCC, another
GND is terminated, midpoint meets the IN+ of B amplifier, and IN- is connect by R7 resistance with OUT, and R3 resistance is passed through in the output of B amplifier again and A is transported
The IN+ put is connected, and C2 filter capacitor is connected with the positive input terminal of A amplifier, other end ground connection, one end point of R1 resistance, R2 resistance
IN+, IN- of A amplifier, another termination signal are not connect；The reverse input end of A amplifier R4 resistance in parallel with output end and C1 capacitor,
VCC, GND are provided by power circuit (10).
6. SCM Based digitlization circuit of power factor correction according to claim 5, it is characterised in that: the drive
Dynamic model block (5) includes the triode of three NPN types, and IN terminates the base stage into Q4 triode, while pulling up the termination of R32 resistance one
3.3V, the base stage of a termination Q4 triode, R33 resistance connect the base stage and emitter of Q4 triode, and collector connects tri- pole Q3
Pipe, the base stage of Q5 triode are simultaneously connected with one end of R34 resistance, another termination 15V of R34 resistance；The transmitting base of Q3 triode with
The collector of Q5 triode is connected, while output end of the node as OUT, the transmitting of the transmitting base and Q4 triode of Q5 triode
Base is grounded jointly, and 15V, GND are provided by power circuit (10).
7. SCM Based digitlization circuit of power factor correction according to claim 6, it is characterised in that: the electricity
Current voltage detection module (7) carries out DC voltage acquisition using directly partial pressure mode, and DC current acquisition uses INA282 chip,
+ IN ,-IN terminal connect the R1 resistance in 10 Europe, R2 resistance respectively, and+the IN ,-IN of another chip termination of R1 resistance and R2 resistance draw
Foot, R1 resistance, R2 resistance both ends are mutually coupled respectively the C13 capacitor of 0.1 μ F, C14 capacitor again；GND, REF1, REF2 pin point
It is not grounded, V+ pin connects 5V voltage, and the C12 filter capacitor of a 0.1 μ F is accessed between 5V and ground, and OUT pin accesses a 1K
R34 resistance, wherein 5V, GND by power circuit (10) provide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820631146.XU CN208353215U (en) | 2018-04-28 | 2018-04-28 | SCM Based digitlization circuit of power factor correction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820631146.XU CN208353215U (en) | 2018-04-28 | 2018-04-28 | SCM Based digitlization circuit of power factor correction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208353215U true CN208353215U (en) | 2019-01-08 |
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| CN201820631146.XU Expired - Fee Related CN208353215U (en) | 2018-04-28 | 2018-04-28 | SCM Based digitlization circuit of power factor correction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947108A (en) * | 2017-12-27 | 2018-04-20 | 四川赛科安全技术有限公司 | Over-current detection applied to fire alarm control system protects circuit and implementation method |
| CN110611442A (en) * | 2019-11-08 | 2019-12-24 | 成都信息工程大学 | PWM (pulse-width modulation) rectifying circuit for charging pile |
| CN111665391A (en) * | 2019-03-08 | 2020-09-15 | 杭州海康威视数字技术股份有限公司 | Power class detection device |
| CN113759799A (en) * | 2021-09-18 | 2021-12-07 | 中车唐山机车车辆有限公司 | Calibration circuit and calibration equipment |
-
2018
- 2018-04-28 CN CN201820631146.XU patent/CN208353215U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947108A (en) * | 2017-12-27 | 2018-04-20 | 四川赛科安全技术有限公司 | Over-current detection applied to fire alarm control system protects circuit and implementation method |
| CN111665391A (en) * | 2019-03-08 | 2020-09-15 | 杭州海康威视数字技术股份有限公司 | Power class detection device |
| CN110611442A (en) * | 2019-11-08 | 2019-12-24 | 成都信息工程大学 | PWM (pulse-width modulation) rectifying circuit for charging pile |
| CN113759799A (en) * | 2021-09-18 | 2021-12-07 | 中车唐山机车车辆有限公司 | Calibration circuit and calibration equipment |
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