CN206041501U - Low -voltage capacitor switching circuit based on high -speed ADC sampling - Google Patents
Low -voltage capacitor switching circuit based on high -speed ADC sampling Download PDFInfo
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- CN206041501U CN206041501U CN201620746373.8U CN201620746373U CN206041501U CN 206041501 U CN206041501 U CN 206041501U CN 201620746373 U CN201620746373 U CN 201620746373U CN 206041501 U CN206041501 U CN 206041501U
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- latching relay
- magnetic latching
- speed adc
- cpu
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model discloses a low -voltage capacitor switching circuit based on high -speed ADC sampling, include: CPU module, power module, high -speed ADC sampling module, silicon controlled rectifier drive module, magnetic latching relay drive module, signal detection module, the CPU module is connected to the output of signal detection module and high -speed ADC sampling module, silicon controlled rectifier drive module and magnetic latching relay drive module are connected to the output of CPU module, the silicon controlled rectifier is connected to silicon controlled rectifier drive module's output, magnetic latching relay is connected to magnetic latching relay drive module's output, magnetic latching relay and silicon controlled rectifier are parallelly connected to be set up, power module is CPU module and the power supply of high -speed ADC sampling module. The utility model discloses a low -voltage capacitor's zero crossing switching function has smallly, and interference immunity is high, and the reliability is high, and security height and circuit are simply easy -to -use, has better application prospect in low pressure reactive compensation field.
Description
Technical field
This utility model is related to a kind of low tension switch class device, and in particular to a kind of based on the low of high-speed ADC sampling
Piezoelectric capsule switching circuit.
Background technology
With the fast development of power system in recent years, the contradiction of need for electricity is eased, but power consumer is to being
The requirement but more and more higher of the system quality of power supply.The mesh of the propulsion resources conservation intensive utilization proposed according to " 13 " planning outline
Mark, into attaching most importance in allround promotion energy conservation and in terms of establishing and improve resources effective utilization mechanism, therefore uses idle benefit
Repay equipment reduction line loss to be particularly important.In actual applications, it is that low voltage power distribution network installation reactive power compensator can
To effectively reduce line loss, the bringing onto load rate of transformator is improved, improve power factor, reach energy-saving purpose.Idle benefit
Repay device to be mainly by the switching of secondary capacitor to reach the local compensation of reactive current, and secondary capacitor put into
What Cheng Zhonghui generations were higher shoves and impacts, and causes certain impact on the safe and stable operation of electrical network.Existing low tension switch class dress
The detection for realizing voltage over zero using optocoupler detection method is put, but due to the pressure of optocoupler itself conducting in optocoupler detection process
The impact of drop and voltage harmonic, can produce larger error when pressure reduction zero point is detected.
Utility model content
Technical problem to be solved in the utility model is, for above-mentioned deficiency of the prior art, to disclose a kind of base
In the secondary capacitor switching circuit of high-speed ADC sampling, the company between secondary capacitor and low-voltage network is mainly applied
Connect, prevent secondary capacitor from producing when accessing low-voltage network and shove, using the characteristic of alternating current power supply, secondary capacitor be
Circuit is connected when pressure reduction is zero between system voltage so that it is zero that secondary capacitor connects the electric current of moment, is gushed so as to reach elimination
The effect of stream.
This utility model solves the technical scheme adopted by its technical problem：
A kind of secondary capacitor switching circuit sampled based on high-speed ADC, it is characterised in that：Including：CPU module, power supply
Module, high-speed ADC sampling module, controllable silicon drive module, magnetic latching relay drive module, signal detection module；The letter
The outfan connection CPU module of number detection module and high-speed ADC sampling module, the outfan connection controllable silicon of the CPU module
Drive module and magnetic latching relay drive module, the outfan connection controllable silicon of the controllable silicon drive module, the magnetic are protected
The outfan connection magnetic latching relay of relay driving module is held, the magnetic latching relay and controllable silicon are arranged in parallel, institute
It is that CPU module and high-speed ADC sampling module are powered to state supply module.
Further, the supply module carries out voltage using using DCDC chip LT1930A chips and LT1931A chips
Conversion, the 3.3V voltages that wherein 5V voltage conversions are used by LT1930A chips into CPU, LT1931A chips by 5V voltage conversions into
- 5V voltages needed for ADC sampling modules.
Further, the high-speed ADC sampling module includes secondary capacitor, voltage transformer, operational amplifier and AD
Sampler, the former limit of voltage transformer are connected with the L ends of system power supply by resistance, by secondary capacitor connection system power supply
N-terminal, the outfan of voltage transformer is connected with the electrode input end of operational amplifier, the negative pole input of the operational amplifier
End and outfan connect by electric capacity and resistor coupled in parallel circuit, the outfan of the operational amplifier and the VIN0 pins of AD samplers
Connection, DIN, DOUT, SCK, CS leads ends of the AD samplers connect the SPI interface of connected CPU respectively：PA7_SPI1_
MOSI, PA6_SPI1_MISO, PA5_SPI1_SCK, PA4_SPI1_NSS.
Further, the operational amplifier adopts LM321 chips, the AD samplers to adopt AD7324 chips.
Further, controllable silicon drive module includes audion Q1, pulse transformer, bidirectional triode thyristor, resistance R62 and electricity
Hold C61；The PA8_TIM1_CH1 pins of CPU are connected with the base stage of audion Q1, the colelctor electrode and pulse transformer of audion Q1
Input connection, the grounded emitter of audion Q1, the outfan of pulse transformer connect the first of bidirectional triode thyristor respectively
Conduction terminal and door end, the second conduction terminal are connected with secondary capacitor, are attempted by two-way controllable after electric capacity C61 and resistance R52 series connection
First conduction terminal and the second conduction terminal of silicon.
Further, the bidirectional triode thyristor adopts JST80CS-1000BW models, the pulse transformer to adopt
KCB473 models.
Further, the magnetic latching relay drive module includes magnetic latching relay control chip, optical coupling isolator
And magnetic latching relay, PA14, PA15 port of CPU module passes through optical coupling isolator, U26 and magnetic latching relay control chip
The connection of INA, INB pin, 12V voltages access the VCC ends of magnetic latching relay control chip after diode D33, while
Big capacity electrolyte capacitor C43 in parallel, the outfan of magnetic latching relay control chip are connected with the 3 of magnetic latching relay, 4 pins
Connect, 1 pin of magnetic latching relay is connected with system power supply, and 2 pins are connected with secondary capacitor.
Further, the magnetic latching relay control chip adopts BL8023 chips, the magnetic latching relay to adopt
BST902-90A models.
Further, the signal detection module includes three groups of detection circuits, per group of detection circuit by divider resistance and
Optical coupling isolator is constituted, and wherein external voltage system is connected with optical coupling isolator U27 by resistance R63, optical coupling isolator U27's
Outfan is connected with the PB0 ports of CPU module；The pressure reduction of secondary capacitor is connected with optical coupling isolator U28 by resistance R64,
The outfan of optical coupling isolator U28 is connected with the PB1 ports of CPU module；System voltage passes through resistance R65 and optical coupling isolator
U29 connects, and the outfan of optical coupling isolator U29 is connected with the PB2 ports of CPU module.
This utility model has advantages below compared with prior art：
1st, this utility model realizes the zero crossing switching function of secondary capacitor, and secondary capacitor switching device is used
The CPU programming Controls of ARM platforms, receive external control signal, carry out switching operation to capacitor；Needing to put into capacitor
When, the voltage difference zero crossing between capacitor and system voltage is accurately detected by high-speed ADC sampling module, and at this moment
Triggering controlled silicon conducting, it is ensured that capacitor was put at the voltage difference zero crossing moment, at the same magnetic in parallel with controllable silicon holding after
Electrical equipment is closed after controlled silicon conducting, and of short duration time delay recession completes once to put into process except controllable silicon drive signal.Needing to cut
During except capacitor, controlled silicon conducting is triggered after excision instruction is received, form in parallel with magnetic latching relay, after of short duration time delay
Disconnect magnetic to keep, remove silicon controlled drive signal, using silicon controlled characteristic, the current zero-crossing point moment is automatic on the capacitor
Cut-off, completes excision process.
2nd, this utility model can be reduced to producing to shove in switched capacitor within 1 times of rated current, and adopting can
Control silicon and magnetic latching relay parallel operation, using the holding of silicon controlled high speed ducting capacity and magnetic latching relay
Ability, completes the switching of capacitor.
3rd, this utility model provides power down, can cut off magnetic latching relay in power down moment, it is ensured that circuit is in disconnection shape
State.
4th, this utility model has small volume, and anti-interference is high, and reliability is high, and safe and circuit is easy to use,
There is preferable application prospect in low-pressure reactive compensation field.
Description of the drawings
A kind of secondary capacitor switching circuit structure block diagram sampled based on high-speed ADC that Fig. 1 is provided for this utility model；
A kind of secondary capacitor switching circuit electrical principle sampled based on high-speed ADC that Fig. 2 is provided for this utility model
Figure.
The 5V of the supply module that Fig. 3 a are provided for this practicality exports the circuit diagram of 3.3V voltages；
The supply module 5V outputs -5V potential circuit figures that Fig. 3 b are provided for this practicality；
The high-speed ADC sampling module circuit diagram that Fig. 4 is provided for this practicality；
The controllable silicon drive module circuit diagram that Fig. 5 is provided for this practicality；
The magnetic latching relay drive module circuit diagram that Fig. 6 is provided for this practicality；
The signal detection module circuit diagram that Fig. 7 is provided for this practicality.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment describes this utility model specific embodiment：
Referring to a kind of secondary capacitor switching circuit structure sampled based on high-speed ADC that Fig. 1 is provided for this utility model
Figure.
As shown in figure 1, a kind of secondary capacitor switching circuit sampled based on high-speed ADC, it is characterised in that：Including：CPU
Module, supply module, high-speed ADC sampling module, controllable silicon drive module, magnetic latching relay drive module, signal detection mould
Block；The outfan connection CPU module of the signal detection module and high-speed ADC sampling module, the outfan of the CPU module connect
Controllable silicon drive module and magnetic latching relay drive module is connect, the outfan of the controllable silicon drive module connects controllable silicon,
The outfan connection magnetic latching relay of the magnetic latching relay drive module, the magnetic latching relay and controllable silicon parallel connection
Arrange, the supply module is that CPU module and high-speed ADC sampling module are powered.
In this utility model embodiment, throwing of the CPU module by the detection signal control circuit of reception signal detection module
Cut, when needing to put into capacitor, the voltage between capacitor and system voltage is accurately detected by high-speed ADC sampling module
Difference zero crossing, and controllable silicon drive module driving controlled silicon conducting is triggered at this moment, it is ensured that capacitor is in voltage difference zero passage
Point moment input；Magnetic latching relay module simultaneously in parallel with controllable silicon drive module is closed after controlled silicon conducting, of short duration
Time delay recession completes once to put into process except controllable silicon drive signal.During excision capacitor, trigger after excision instruction is received
Controllable silicon drive module is turned on, and forms in parallel with magnetic latching relay module, disconnects magnetic latching relay module after of short duration time delay,
Silicon controlled drive signal is removed, using silicon controlled characteristic, on the capacitor current zero-crossing point moment automatic cut-off, completes to cut
Except process.
In this utility model embodiment, when signal detection module detects secondary capacitor broken string or system voltage disappearance
Moment refusal input operation or excision have put into capacitor.
Referring to Fig. 2, it is the electrical principle letter of the secondary capacitor switching circuit that this utility model is sampled based on high-speed ADC
Figure.
As shown in Fig. 2 controllable silicon is parallel relationship with magnetic latching relay, using the instantaneous conduction of silicon controlled and magnetic
The retention performance of guard relay completes the switching to capacitor.Voltage transformer is by the voltage between system voltage and capacitor
Export after conversion and give ADC sampling modules, voltage is that zero moment triggering controllable silicon is led with system voltage difference on electric capacity is collected
Logical, subsequently closure magnetic latching relay forms in parallel with controllable silicon, disconnects silicon controlled trigger afterwards, using magnetic holding after
The holding performance of electrical equipment completes the input of capacitor.Controlled silicon conducting will be triggered in excision, with closed magnetic keep after
Electrical equipment forms parallel connection, finally cuts off magnetic latching relay, and removes silicon controlled trigger, can be using silicon controlled characteristic
On capacitor, electric current is zero moment automatic shutoff circuit, completes the excision of capacitor.
The 5V of the supply module provided for this practicality referring to Fig. 3 a and Fig. 3 b, wherein Fig. 3 a exports the electricity of 3.3V voltages
Lu Tu；The supply module 5V outputs -5V potential circuit figures that Fig. 3 b are provided for this practicality；
As shown in Figure 3 a and Figure 3 b shows, supply module carries out voltage stabilizing and filtering by special DCDC chips to input voltage, carries
For the negative and positive dual power being adapted to needed for the stabilized power source and high-speed ADC sampling module of CPU work.Supply module adopts high efficiency
The 3.3V voltages that 5V voltage conversions are used into CPU by DCDC chips LT1930A and LT1931A as voltage conversion, LT1930A,
LT1931A is by -5V the voltages needed for 5V voltage conversions into ADC sampling modules.
Referring to the high-speed ADC sampling module circuit diagram that Fig. 4 is provided for this practicality.
As shown in figure 4, high-speed ADC sampling module gathers switch ends voltage by high-speed ADC conversion chip AD7324, and
Sampled value is exported to CPU by standard SPI interface, according to sampled value, CPU judges that switch measures the voltage over zero moment and makees
Go out corresponding control.
High-speed ADC sampling module includes secondary capacitor, voltage transformer, operational amplifier and AD samplers, and voltage is mutual
The former limit of sensor is connected with the L ends of system power supply by resistance R61, by the N-terminal of secondary capacitor connection system power supply, voltage
The outfan of transformer is connected with the electrode input end of operational amplifier, the negative input and outfan of the operational amplifier
Connection is led to by 47 parallel circuit of electric capacity C42 and resistance, the pressure reduction between voltage transformer collection secondary capacitor and system voltage
Cross high speed amplifier LM321 and current signal is converted into into the input that voltage signal delivers to AD7324, converted is adopted by AD7324
Sample value transports to CPU by the oral instructions of standard SPI.Due to collection is AC signal, and for guaranteeing signal integrity, amplifier is taken positive and negative
5V dual power supplies, and the acquisition range of AD7324 is -5V ~+5V, can meet practice demand.U33 is high speed amplifier
The SPI interface of LM321, CPU, PA7_SPI1_MOSI, PA6_SPI1_MISO, PA5_SPI1_SCK, PA4_SPI1_NSS difference
It is connected with DIN, DOUT, SCK, CS of AD7324.
Referring to Fig. 5, for the controllable silicon drive module circuit diagram that this practicality is provided.
As shown in figure 5, controllable silicon drive module includes audion Q1, pulse transformer T4, bidirectional triode thyristor SCR1, resistance
R62 and electric capacity C61；The PA8_TIM1_CH1 pins of CPU are connected with the base stage of audion Q1, the colelctor electrode of audion Q1 and pulse
The input connection of transformator T4, the grounded emitter of audion Q1, the outfan of pulse transformer T4 connect respectively it is two-way can
First conduction terminal of control silicon SCR1 and door end, the second conduction terminal are connected with secondary capacitor C, after electric capacity C61 and resistance R52 series connection
It is attempted by first conduction terminal and the second conduction terminal of bidirectional triode thyristor SCR1.
Controllable silicon drive module drives silicon controlled to lead by the pulse signal that CPU sends after pulse transformer isolation
It is logical.Controllable silicon two ends parallel connection resistance capaciting absorpting circuit, limiting circuit voltage build-up rate, it is ensured that controllable silicon safe operation.It is two-way controllable
Bidirectional triode thyristors of the silicon SCR1 using JST80CS-1000BW types, is driven using controllable silicon Special pulse transformator KCB473；R62
Resistance capaciting absorpting circuit in parallel is constituted with C61, suppresses voltage build-up rate.From the PWM ripples sent by the PA8_TIM1_CH1 pins of CPU
After the amplification of audion Q1, into the input of pulse transformer, while controllable silicon gate pole last time induces identical voltage,
Controlled silicon conducting.As, in AC system, controllable silicon voluntarily can be turned off when electric current is zero, therefore remove controllable after pwm signal
Silicon voluntarily can be turned off.
The magnetic latching relay drive module circuit diagram that Fig. 6 is provided for this practicality；
Referring to Fig. 6, magnetic latching relay drive module, using BST902-90A type magnetic latching relays, the magnetic keep after
Electrical equipment uses one group of coil, and on coil, the conversion of polarity of voltage can be with the division state of control relay, need not after State Transferring
Continued power can keep current state.Magnetic latching relays of the magnetic latching relay control chip U32 using BL8023 models
Control chip, will export A, B input port to BL8023 using optocoupler, as A, B after the state isolation of PA14, PA15 of CPU
When input port is high level or low level simultaneously, A, B delivery outlet is presented high-impedance state；When B input ports be low level, A input ports
For high level when, A, B delivery outlet drive magnetic latching relay closure；When A input ports are low level, and B input ports are high level,
A, B delivery outlet drives magnetic latching relay to disconnect.Required 12V voltages access BL8023 after diode D33, while in parallel
Big capacity electrolyte capacitor C43, can send excision signal when CPU detects power down moment, and the upper storing electricities of C43 can effectively ensure that
Relay cuts off, and D33 can prevent power down moment C43 storing electricities from being consumed by other components and parts.
Referring to Fig. 7, for the signal detection module circuit diagram that this practicality is provided.
As shown in fig. 7, signal detection module is detected by optocoupler and isolation signals, CPU detects the defeated of optocoupler by I/O port
Go out signal and judge the states such as external control signal, system power failure, capacitor broken string.All of external signal through electric resistance partial pressure with
And the I/O port of CPU after light-coupled isolation, is transferred to, it is anti-stop signal interference, using the pull-up resistor stabilization signal state of 10K.It is outside
12V signals determine the state of switch as control signal, detect the number of converting to using optical coupling isolator U27 and make signal isolation
For delivering to the PB0 pins of CPU after switching signal.Optical coupling isolator U28 by and resistance R64 series connection after access system voltage and low
Between piezoelectric capsule, turn under secondary capacitor wiring good situations, if there is the non-wiring of secondary capacitor, U28 does not lead
Logical, CPU reads the signal by PB1 pins and can determine whether capacitor whether wiring is good.Optical coupling isolator U29 and resistance R65 strings
It is connected to after connection between system voltage L, N, exports to the PB2 pins of CPU as system power failure detection signal.
This utility model can be reduced to producing to shove in switched capacitor within 1 times of rated current, using controllable
Silicon and magnetic latching relay parallel operation, using the holding energy of silicon controlled high speed ducting capacity and magnetic latching relay
Power, completes the switching of capacitor.This utility model provides power down, can cut off magnetic latching relay in power down moment, it is ensured that circuit
It is off.
This utility model has small volume, and anti-interference is high, and reliability is high, and safe and circuit is easy to use,
Low-pressure reactive compensation field has preferable application prospect.
This utility model preferred implementation is explained in detail above in conjunction with accompanying drawing, but this utility model is not limited to
Above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, can be with without departing from this utility model
Make a variety of changes on the premise of objective.
Many other changes and remodeling can be made without departing from spirit and scope of the present utility model.It should be appreciated that this reality
Specific embodiment is not limited to new, scope of the present utility model is defined by the following claims.
Claims (2)
1. it is a kind of based on high-speed ADC sample secondary capacitor switching circuit, it is characterised in that：Including：CPU module, power supply mould
Block, high-speed ADC sampling module, controllable silicon drive module, magnetic latching relay drive module, signal detection module；The signal
The outfan connection CPU module of detection module and high-speed ADC sampling module, the outfan connection controllable silicon of the CPU module are driven
Dynamic model block and magnetic latching relay drive module, the outfan connection controllable silicon of the controllable silicon drive module, the magnetic keep
The outfan connection magnetic latching relay of relay driving module, the magnetic latching relay and controllable silicon are arranged in parallel, described
Supply module is that CPU module and high-speed ADC sampling module are powered.
2. it is according to claim 1 it is a kind of based on high-speed ADC sample secondary capacitor switching circuit, it is characterised in that
The supply module carries out voltage conversion, wherein LT1930A using using DCDC chip LT1930A chips and LT1931A chips
The 3.3V voltages that 5V voltage conversions are used by chip into CPU, LT1931A chips are by needed for 5V voltage conversions into ADC sampling modules
- 5V voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620746373.8U CN206041501U (en) | 2016-07-15 | 2016-07-15 | Low -voltage capacitor switching circuit based on high -speed ADC sampling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620746373.8U CN206041501U (en) | 2016-07-15 | 2016-07-15 | Low -voltage capacitor switching circuit based on high -speed ADC sampling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206041501U true CN206041501U (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620746373.8U Active CN206041501U (en) | 2016-07-15 | 2016-07-15 | Low -voltage capacitor switching circuit based on high -speed ADC sampling |
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| CN (1) | CN206041501U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350370A (en) * | 2019-07-17 | 2019-10-18 | 南京伊科诺电气科技有限公司 | A kind of intelligent socket and its operating passing zero method |
-
2016
- 2016-07-15 CN CN201620746373.8U patent/CN206041501U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350370A (en) * | 2019-07-17 | 2019-10-18 | 南京伊科诺电气科技有限公司 | A kind of intelligent socket and its operating passing zero method |
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| GR01 | Patent grant |