CN207730843U - A kind of soft strater backward detection circuit - Google Patents
A kind of soft strater backward detection circuit Download PDFInfo
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- CN207730843U CN207730843U CN201820056386.1U CN201820056386U CN207730843U CN 207730843 U CN207730843 U CN 207730843U CN 201820056386 U CN201820056386 U CN 201820056386U CN 207730843 U CN207730843 U CN 207730843U
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Abstract
The utility model discloses a kind of soft strater backward detection circuits; belong to electronic technology field; including three-phase input power supply, three-phase protective circuit of voltage regulation, three-phase voltage isolated variable circuit, Phase sequence detection device circuit and CPU processor circuit, solves the technical issues of soft strater inlet wire three-phase mains voltage phase sequence accurately detects；The accurate detection of soft strater inlet wire three-phase mains voltage phase sequence may be implemented in the utility model, effectively reduce the invalid number of starts of motor, the service life and efficiency of motor and soft starting device are improved, motor impact of the startup for power grid in vain is reduced, there is stronger practicability.
Description
Technical field
The utility model belongs to electronic technology field more particularly to a kind of soft strater backward detection circuit.
Background technology
Since threephase asynchronous machine is that a kind of counter voltage load will produce in asynchronous machine start-up course and be several times as much as electricity
The dash current of machine rated current.When threephase asynchronous machine power is larger, which can cause the fluctuation of network voltage
And then corresponding inlet wire equipment is damaged, bring security risk.Meanwhile the conventional application scenario of threephase asynchronous machine does not allow motor
Reversion.Threephase asynchronous machine soft strater is a kind of current widely used motor starting device, can reduce motor and open
The impact brought when dynamic influences.But traditional conventional softstarters do not have incoming power Phase sequence detection recognition capability, cause motor
The invalid number of starts increases, and the invalid startup repeated will reduce the service life of motor and starter, reduce production efficiency,
Soft strater is badly in need of to identify the function of incoming power phase sequence.
Utility model content
The purpose of this utility model is to provide a kind of soft strater backward detection circuit, solves soft strater inlet wire three
Phase supply voltage phase sequence accurately detect the technical issues of.
To achieve the above object, the utility model adopts the following technical solution：
A kind of soft strater backward detection circuit, including three-phase input power supply, three-phase protective circuit of voltage regulation, three-phase voltage
Isolated variable circuit, Phase sequence detection device circuit and CPU processor circuit,
Three-phase input power supply is equipped with output end USA, output end USB and output end USC；
Three-phase protective circuit of voltage regulation includes varistor RV1, varistor RV2 and varistor RV3, varistor RV1
It is connected across between output end USA and output end USB, varistor RV2 is connected across between output end USB and output end USC, pressure-sensitive
Resistance RV3 is connected across between output end USA and output end USC；
Three-phase voltage isolated variable circuit includes input resistance Rin1, input resistance Rin2, input resistance Rin3, isolator
Part PT1, isolating device PT2, isolating device PT3, wave filtering circuit RC1, wave filtering circuit RC2 and wave filtering circuit
RC3, the input resistance Rin1 include resistance R1 and resistance R2, and one end of resistance R1 is connected to one end of varistor RV1,
One end of resistance R2 is connected to the other end of varistor RV1, the other end of resistance R1 and the other end of resistance R2 respectively with every
Two input terminals connection from device PT1；Input resistance Rin2 includes resistance R3 and resistance R4, and one end of resistance R3 is connected to pressure
One end of quick resistance RV2, one end of resistance R4 are connected to the other end of varistor RV2, the other end and resistance R4 of resistance R3
The other end connect respectively with two input terminals of isolating device PT2；Input resistance Rin3 includes resistance R5 and resistance R6, resistance
One end of R5 is connected to one end of varistor RV3, and one end of resistance R6 is connected to the other end of varistor RV3, resistance R5
The other end and the other end of resistance R6 connect respectively with two input terminals of isolating device PT3；
Phase sequence detection device circuit includes Phase sequence detection device and its peripheral circuit, Phase sequence detection device be equipped with pin VAP,
The output end UAP of pin VBP and pin VCP, isolating device PT1 after the filtering of wave filtering circuit RC1 with Phase sequence detection
Device pin VAP is connected, the output end UBP of isolating device PT2 after the filtering of wave filtering circuit RC2 with phase-sequence detector
Part pin VBP be connected, after the filtering of the output end UCP wave filtering circuits RC3 of isolating device PT3 with Phase sequence detection device pin
VCP is connected；
CPU processor circuit includes CPU and its peripheral circuit, and Phase sequence detection device passes through SPI interface communication link with CPU
It connects.
The model ADE7754 of the Phase sequence detection device；The model STC12C5A60S2 of the CPU；The isolation
Device PT1, isolating device PT2 and isolating device PT3 are transformer or voltage transformer, the voltage transformer model
SPT204V。
The RC low-pass filters that the wave filtering circuit RC1 is made of resistance R7 and capacitance C1, the sampling filter
The RC low-pass filters that circuit RC2 is made of resistance R8 and capacitance C2, the wave filtering circuit RC3 are by resistance R9 and electricity
Hold the RC low-pass filters of C3 compositions.
A kind of soft strater backward detection circuit described in the utility model, solves soft strater inlet wire three phase mains
Voltage phase sequence accurately detect the technical issues of；Soft strater inlet wire three-phase mains voltage phase sequence may be implemented in the utility model
Accurate detection, effectively reduces the invalid number of starts of motor, improves the service life and efficiency of motor and soft starting device, reduces
Motor starts the impact for power grid in vain, has stronger practicability.
Description of the drawings
Fig. 1 is the circuit block diagram of the utility model；
Fig. 2 is the circuit diagram of the three-phase protective circuit of voltage regulation and three-phase voltage isolated variable circuit of the utility model；
Fig. 3 is the circuit diagram that backward detects device.
Specific implementation mode
It is protected by a kind of Fig. 1-soft strater backward detection circuits shown in Fig. 3, including three-phase input power supply, three-phase voltage stabilizing
Protection circuit, three-phase voltage isolated variable circuit, Phase sequence detection device circuit and CPU processor circuit,
Three-phase input power supply is equipped with output end USA, output end USB and output end USC；
Three-phase protective circuit of voltage regulation includes varistor RV1, varistor RV2 and varistor RV3, varistor RV1
It is connected across between output end USA and output end USB, varistor RV2 is connected across between output end USB and output end USC, pressure-sensitive
Resistance RV3 is connected across between output end USA and output end USC；
When input supply voltage USA, USB, USC amplitude bears voltage magnitude higher than varistor RV1, RV2, RV3, pressure
Quick resistance RV1, RV2, RV3 play the role of voltage-stabilizing protection, avoid the damage for subsequently connecting circuit.
Three-phase voltage isolated variable circuit includes input resistance Rin1, input resistance Rin2, input resistance Rin3, isolator
Part PT1, isolating device PT2, isolating device PT3, wave filtering circuit RC1, wave filtering circuit RC2 and wave filtering circuit
RC3, the input resistance Rin1 include resistance R1 and resistance R2, and one end of resistance R1 is connected to one end of varistor RV1,
One end of resistance R2 is connected to the other end of varistor RV1, the other end of resistance R1 and the other end of resistance R2 respectively with every
Two input terminals connection from device PT1；Input resistance Rin2 includes resistance R3 and resistance R4, and one end of resistance R3 is connected to pressure
One end of quick resistance RV2, one end of resistance R4 are connected to the other end of varistor RV2, the other end and resistance R4 of resistance R3
The other end connect respectively with two input terminals of isolating device PT2；Input resistance Rin3 includes resistance R5 and resistance R6, resistance
One end of R5 is connected to one end of varistor RV3, and one end of resistance R6 is connected to the other end of varistor RV3, resistance R5
The other end and the other end of resistance R6 connect respectively with two input terminals of isolating device PT3；
Input resistance Rin1, input resistance Rin2 and input resistance Rin3 can play metering function, prevent to isolator
The damage of part PT1, isolating device PT2 and isolating device PT3.
Phase sequence detection device circuit includes Phase sequence detection device and its peripheral circuit, Phase sequence detection device be equipped with pin VAP,
The output end UAP of pin VBP and pin VCP, isolating device PT1 after the filtering of wave filtering circuit RC1 with Phase sequence detection
Device pin VAP is connected, the output end UBP of isolating device PT2 after the filtering of wave filtering circuit RC2 with phase-sequence detector
Part pin VBP be connected, after the filtering of the output end UCP wave filtering circuits RC3 of isolating device PT3 with Phase sequence detection device pin
VCP is connected；
The secondary side of isolating device PT1 obtains Small Current Signal, and resistance R7 and noise reduction capacitance C1 is coordinated to generate voltage signal
UUAP inputs phase-sequence detector part corresponding pin, and the secondary side of isolating device PT2 obtains Small Current Signal, coordinates resistance R8 and noise reduction
Capacitance C2 generates voltage signal UUBP and inputs phase-sequence detector part corresponding pin；The secondary side of isolating device PT3 obtains the small letter of electric current
Number, coordinate resistance R9 and noise reduction capacitance C3 to generate voltage signal UUCP and inputs phase-sequence detector part corresponding pin.
CPU processor circuit includes CPU and its peripheral circuit, and Phase sequence detection device passes through SPI interface communication link with CPU
It connects.
The model ADE7754 of the Phase sequence detection device；The model STC12C5A60S2 of the CPU；The isolation
Device PT1, isolating device PT2 and isolating device PT3 are transformer or voltage transformer, the voltage transformer model
SPT204V。
The RC low-pass filters that the wave filtering circuit RC1 is made of resistance R7 and capacitance C1, the sampling filter
The RC low-pass filters that circuit RC2 is made of resistance R8 and capacitance C2, the wave filtering circuit RC3 are by resistance R9 and electricity
Hold the RC low-pass filters of C3 compositions.
When work, soft strater incoming power powers on, and CPU processor completes necessary initialization operation, and CPU processor is logical
The spi bus connected between Phase sequence detection device is crossed, the setting operation to the corresponding control register of Phase sequence detection device is completed,
And periodically inspection corresponds to the level state of I/O pin/IRQ, when corresponding incoming power USA, USB, USC voltage phase sequence is not inconsistent
When closing positive sequence phase relation, corresponding Phase sequence detection device /IRQ pins are pulled low as low level, CPU processor period at this time
When property inspection I/O port, when detecting effective low level signal, corresponding backward logical process can be directly executed, and indicate soft
Starter inlet wire backward state avoids user from directly carrying out starting asynchronous machine in vain；Meanwhile if incoming power USA, USB,
When USC meets conventional positive sequence phase relation, pin/IRQ can then keep high level；
A kind of soft strater backward detection circuit described in the utility model, solves soft strater inlet wire three phase mains
Voltage phase sequence accurately detect the technical issues of；Soft strater inlet wire three-phase mains voltage phase sequence may be implemented in the utility model
Accurate detection, effectively reduces the invalid number of starts of motor, improves the service life and efficiency of motor and soft starting device, reduces
Motor starts the impact for power grid in vain, has stronger practicability.
Particular embodiments described above has carried out into one the purpose of this utility model, technical solution and advantageous effect
Step is described in detail, it should be understood that the foregoing is merely specific embodiment of the utility model, is not limited to this
Utility model, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all wrap
Containing being within the protection scope of the utility model.
Claims (3)
1. a kind of soft strater backward detection circuit, it is characterised in that：Including three-phase input power supply, three-phase voltage-stabilizing protection electricity
Road, three-phase voltage isolated variable circuit, Phase sequence detection device circuit and CPU processor circuit；
Three-phase input power supply is equipped with output end USA, output end USB and output end USC；
Three-phase protective circuit of voltage regulation includes varistor RV1, varistor RV2 and varistor RV3, varistor RV1 bridgings
Between output end USA and output end USB, varistor RV2 is connected across between output end USB and output end USC, varistor
RV3 is connected across between output end USA and output end USC；
Three-phase voltage isolated variable circuit includes input resistance Rin1, input resistance Rin2, input resistance Rin3, isolating device
PT1, isolating device PT2, isolating device PT3, wave filtering circuit RC1, wave filtering circuit RC2 and wave filtering circuit RC3,
The input resistance Rin1 includes resistance R1 and resistance R2, and one end of resistance R1 is connected to one end of varistor RV1, resistance
One end of R2 is connected to the other end of varistor RV1, the other end of resistance R1 and the other end of resistance R2 respectively with isolator
Two input terminals of part PT1 connect；Input resistance Rin2 includes resistance R3 and resistance R4, and one end of resistance R3 is connected to pressure-sensitive electricity
One end of RV2 is hindered, one end of resistance R4 is connected to the other end of varistor RV2, and the other end of resistance R3 and resistance R4's is another
One end is connect with two input terminals of isolating device PT2 respectively；Input resistance Rin3 includes resistance R5 and resistance R6, resistance R5's
One end is connected to one end of varistor RV3, and one end of resistance R6 is connected to the other end of varistor RV3, and resistance R5's is another
The other end of one end and resistance R6 are connect with two input terminals of isolating device PT3 respectively；
Phase sequence detection device circuit includes Phase sequence detection device and its peripheral circuit, and Phase sequence detection device is equipped with pin VAP, pin
The output end UAP of VBP and pin VCP, isolating device PT1 after the filtering of wave filtering circuit RC1 with Phase sequence detection device
Pin VAP is connected, and the output end UBP of isolating device PT2 draws after the filtering of wave filtering circuit RC2 with Phase sequence detection device
Foot VBP be connected, after the filtering of the output end UCP wave filtering circuits RC3 of isolating device PT3 with Phase sequence detection device pin VCP
It is connected；
CPU processor circuit includes CPU and its peripheral circuit, and Phase sequence detection device is communicated to connect with CPU by SPI interface.
2. a kind of soft strater backward detection circuit as described in claim 1, it is characterised in that：The Phase sequence detection device
Model ADE7754；The model STC12C5A60S2 of the CPU；The isolating device PT1, isolating device PT2 and isolation
Device PT3 is transformer or voltage transformer, the voltage transformer model SPT204V.
3. a kind of soft strater backward detection circuit as described in claim 1, it is characterised in that：The wave filtering circuit
The RC low-pass filters that RC1 is made of resistance R7 and capacitance C1, the wave filtering circuit RC2 are by resistance R8 and capacitance C2
The RC low-pass filters of composition, the RC low-pass filters that the wave filtering circuit RC3 is made of resistance R9 and capacitance C3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820056386.1U CN207730843U (en) | 2018-01-15 | 2018-01-15 | A kind of soft strater backward detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820056386.1U CN207730843U (en) | 2018-01-15 | 2018-01-15 | A kind of soft strater backward detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207730843U true CN207730843U (en) | 2018-08-14 |
Family
ID=63082354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820056386.1U Active CN207730843U (en) | 2018-01-15 | 2018-01-15 | A kind of soft strater backward detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207730843U (en) |
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2018
- 2018-01-15 CN CN201820056386.1U patent/CN207730843U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Yongan Inventor after: Wang Dianjun Inventor after: Hua Siyang Inventor before: Li Zhian Inventor before: Wang Dianjun Inventor before: Hua Siyang |
|
| CB03 | Change of inventor or designer information |