CN206876787U - A kind of converter circuit - Google Patents
A kind of converter circuit Download PDFInfo
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- CN206876787U CN206876787U CN201720787774.2U CN201720787774U CN206876787U CN 206876787 U CN206876787 U CN 206876787U CN 201720787774 U CN201720787774 U CN 201720787774U CN 206876787 U CN206876787 U CN 206876787U
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- 238000001514 detection method Methods 0.000 claims abstract description 24
- 230000008878 coupling Effects 0.000 claims abstract description 14
- 238000010168 coupling process Methods 0.000 claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 101100489713 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND1 gene Proteins 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 11
- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 claims description 9
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 claims description 9
- 101100489717 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND2 gene Proteins 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
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Abstract
It the utility model is related to a kind of converter circuit,Including current detection circuit,Voltage detecting circuit,Velocity checking circuits,CPU,Drive circuit,Protection circuit,The current detection circuit,Voltage detecting circuit,The output end of velocity checking circuits connects CPU input respectively,Drive circuit,The input of protection circuit connects CPU output end respectively,Current detection circuit includes U,V,W three-phase detection circuits,Include current input circuit per phase current sensing circuit,Linear optical coupling device,Current output circuit,The output end of electric current input current connects the input of linear optocoupler,The input of current output circuit connects the output end of linear optocoupler,Such current detection circuit can transmit current signal without distortion,Cost is relatively low,And fast response time,For fault alarm,Stoppage protection etc..
Description
Technical field
It the utility model is related to a kind of converter circuit.
Background technology
Frequency converter is to apply converter technique and microelectric technique, is handed over by changing motor working power Frequency Patterns to control
Flow the electric control appliance of motor.Wherein, current detection circuit is an important composition in frequency converter failure detection circuit
Part, it is intended to the working power voltage for making IGBT inverter circuits is ensured within a particular safety scope, if working power jeopardizes
IGBT (be powered and hold comprising power supply storage in itself) device it is safe when, implement fault alarm, braking circuit devoted oneself to work, shut down
The measures such as protection.But traditional frequency conversion device detects electric current, such current detection circuit signal response using Hall sensor
Time is slower, and cost is higher.
The content of the invention
In view of this, the purpose of this utility model is to provide that a kind of current detection circuit response time is fast, cost is relatively low
Converter circuit.
In order to realize the above object the utility model uses such a converter circuit, including current detection circuit, electricity
Pressure detection circuit, velocity checking circuits, CPU, drive circuit, protection circuit, the current detection circuit, voltage detecting circuit,
The output end of velocity checking circuits connects CPU input respectively, and drive circuit, the input of protection circuit connect CPU respectively
Output end, current detection circuit includes U, V, W three-phase detection circuit, include per phase current sensing circuit current input circuit,
Linear optical coupling device, current output circuit, the output end of electric current input current connect the input of linear optocoupler, and electric current is defeated
The input for going out circuit connects the output end of linear optocoupler.
Foregoing circuit is based on linear optical coupling device and Phototube Coupling and linear transfer, linear optical coupling device inside electricity is carried out to signal
Road has amplification, and high impedance inputs, and can transmit current signal without distortion.
This practicality, which is further arranged to current input circuit, includes voltage-stablizer U7, resistance R91, electric capacity C54, C55, C56, institute
Stating linear optical coupling device includes input supply terminal VDD1, in-phase input end VIN+, inverting input VIN-, input grounding end
GND1, the voltage-stablizer U7 output end connection input supply terminal VDD1, voltage-stablizer U7 earth terminal ground connection, voltage-stablizer U7 inputs
End connection external input voltage, resistance R91 one end connection current signal, resistance R91 other ends connection in-phase input end VIN+, electricity
Hold C54, C55 to be connected between input supply terminal VDD1 and input grounding end GND1, electric capacity C56 is connected to in-phase input end
Between VIN+ and input grounding end GND1, inverting input VIN- is connected to input grounding end GND1.
The input side power supply of foregoing circuit can be converted to stable linear optical coupling device voltage, and electric capacity can filter clutter, prevent
Only input signal is disturbed.
This practicality, which is further arranged to current output circuit, includes resistance RU1~RU4, R63, R67, R68, R69, electric capacity
C57~C63, operational amplifier U11A, the linear optical coupling device include out-put supply end VDD2, differential signal outputs
VOUT-, differential signal outputs VOUT+, output earth terminal GND2, the out-put supply end VDD2 connections cpu power, electric capacity
C57 one end connection out-put supply end VDD2, electric capacity C57 other end ground connection, resistance RU2 one end connection differential signal outputs
VOUT-, resistance RU2 other end concatenation operation amplifiers U11A positive input terminal, resistance RU1 one end connection differential signal outputs
VOUT+, resistance RU1 other end concatenation operation amplifiers U11A negative input end, electric capacity C59 are connected to operational amplifier U11A's
Between positive input terminal and negative input end, electric capacity C62 one end concatenation operation amplifiers U11A positive power source terminal, the electric capacity C62 other ends
Ground connection, electric capacity C63 one end concatenation operation amplifiers U11A negative power end, electric capacity C63 other ends ground connection, resistance R67 one end connects
Operational amplifier U11A output end is connect, the resistance R67 other ends are connected respectively to CPU and electric capacity C61 one end, and electric capacity C61 is another
One end is grounded, resistance R68 one end concatenation operation amplifiers U11A negative input end, resistance R68 other ends connection electric capacity C61 mono-
End, resistance R69 and electric capacity C60 are connected in parallel on resistance R68 both ends, output earth terminal GND2 ground connection, electric capacity C58, resistance RU3, RU4
It is connected between differential signal outputs VOUT- and output earth terminal GND2.
Foregoing circuit is by after the linear optocoupler of input signal and operational amplifier amplification, by signal almost without distortion
CPU is transported to, is shown as output current and output control.
Brief description of the drawings
Fig. 1 is the utility model embodiment converter circuit functional-block diagram.
Fig. 2 is the utility model embodiment current input circuit schematic diagram.
Fig. 3 is the utility model embodiment linear optical coupling device circuitry schematic diagram.
Fig. 4 is the utility model embodiment current output circuit schematic diagram.
Embodiment
As shown in figure 1, the utility model is a kind of converter circuit, including current detection circuit, voltage detecting circuit, speed
Degree detection circuit, CPU, drive circuit, protection circuit, the current detection circuit, voltage detecting circuit, velocity checking circuits
Output end connects CPU input respectively, and drive circuit, the input of protection circuit connect CPU output end, electric current inspection respectively
Slowdown monitoring circuit includes U, V, W three-phase detection circuit, includes current input circuit, linear optical coupling device, electricity per phase current sensing circuit
Output circuit is flowed, the output end of electric current input current connects the input of linear optocoupler, the input of current output circuit
Connect the output end of linear optocoupler.
As in Figure 2-4, current input circuit includes voltage-stablizer U7, resistance R91, electric capacity C54, C55, C56, described linear
Optocoupler includes input supply terminal VDD1, in-phase input end VIN+, inverting input VIN-, input grounding end GND1, described
Voltage-stablizer U7 output end connection input supply terminal VDD1, voltage-stablizer U7 earth terminal ground connection, the connection of voltage-stablizer U7 inputs are outer
Portion's input voltage, resistance R91 one end connection current signal, the connection of the resistance R91 other ends in-phase input end VIN+, electric capacity C54,
C55 is connected between input supply terminal VDD1 and input grounding end GND1, electric capacity C56 be connected to in-phase input end VIN+ and
Between the GND1 of input grounding end, inverting input VIN- is connected to input grounding end GND1.Current output circuit includes resistance RU1
~RU4, R63, R67, R68, R69, electric capacity C57~C63, operational amplifier U11A, the linear optical coupling device include output electricity
Source VDD2, differential signal outputs VOUT-, differential signal outputs VOUT+, output earth terminal GND2, the out-put supply
Hold VDD2 connection cpu powers, electric capacity C57 one end connection out-put supply end VDD2, electric capacity C57 other end ground connection, resistance RU2 one end
Connect differential signal outputs VOUT-, resistance RU2 other end concatenation operation amplifiers U11A positive input terminal, resistance RU1 one end
Connect differential signal outputs VOUT+, resistance RU1 other end concatenation operation amplifiers U11A negative input end, electric capacity C59 connections
Between operational amplifier U11A positive input terminal and negative input end, electric capacity C62 one end concatenation operation amplifiers U11A positive electricity
Source, electric capacity C62 other ends ground connection, electric capacity C63 one end concatenation operation amplifiers U11A negative power end, the electric capacity C63 other ends
Ground connection, resistance R67 one end concatenation operation amplifiers U11A output end, the resistance R67 other ends are connected respectively to CPU and electric capacity
C61 one end, electric capacity C61 other ends ground connection, resistance R68 one end concatenation operation amplifiers U11A negative input end, resistance R68 are another
One end connection electric capacity C61 one end, resistance R69 and electric capacity C60 are connected in parallel on resistance R68 both ends, output earth terminal GND2 ground connection, electricity
Hold C58, resistance RU3, RU4 are connected to differential signal outputs VOUT- between output earth terminal GND2.
According to above example, the detection signal of U, V, W three-phase is input to current detection circuit, by current detecting electricity
After the amplification of the linear optical coupling and operational amplifier on road, the signal for exporting certain amplitude is sent to CPU, with incoming current output display and
Output control, reprocess into switching signal amount and be used for fault alarm and stoppage protection.
Claims (3)
- A kind of 1. converter circuit, it is characterised in that：The converter circuit include current detection circuit, voltage detecting circuit, Velocity checking circuits, CPU, drive circuit, protection circuit, the current detection circuit, voltage detecting circuit, velocity checking circuits Output end connect CPU input respectively, drive circuit, the input of protection circuit connect CPU output end respectively,The current detection circuit includes U, V, W three-phase detection circuit, includes current input circuit, line per phase current sensing circuit Property optocoupler, current output circuit, the output end of electric current input current connects the input of linear optocoupler, electric current output The input of circuit connects the output end of linear optocoupler.
- 2. converter circuit according to claim 1, it is characterised in that：The current input circuit includes voltage-stablizer U7, Resistance R91, electric capacity C54, C55, C56, the linear optical coupling device include input supply terminal VDD1, in-phase input end VIN+, anti- Phase input VIN-, input grounding end GND1, the output end connection input supply terminal VDD1 of the voltage-stablizer U7, voltage-stablizer U7's Earth terminal is grounded, voltage-stablizer U7 inputs connection external input voltage, resistance R91 one end connection current signal, and resistance R91 is another End connects in-phase input end VIN+, and electric capacity C54, C55 are connected between input supply terminal VDD1 and input grounding end GND1, Electric capacity C56 is connected between in-phase input end VIN+ and input grounding end GND1, and inverting input VIN- is connected to input grounding Hold GND1.
- 3. converter circuit according to claim 1 or 2, it is characterised in that：The current output circuit includes resistance RU1 ~RU4, R63, R67, R68, R69, electric capacity C57~C63, operational amplifier U11A, the linear optical coupling device include output electricity Source VDD2, differential signal outputs VOUT-, differential signal outputs VOUT+, output earth terminal GND2, the out-put supply Hold VDD2 connection cpu powers, electric capacity C57 one end connection out-put supply end VDD2, electric capacity C57 other end ground connection, resistance RU2 one end Connect differential signal outputs VOUT-, resistance RU2 other end concatenation operation amplifiers U11A positive input terminal, resistance RU1 one end Connect differential signal outputs VOUT+, resistance RU1 other end concatenation operation amplifiers U11A negative input end, electric capacity C59 connections Between operational amplifier U11A positive input terminal and negative input end, electric capacity C62 one end concatenation operation amplifiers U11A positive electricity Source, electric capacity C62 other ends ground connection, electric capacity C63 one end concatenation operation amplifiers U11A negative power end, the electric capacity C63 other ends Ground connection, resistance R67 one end concatenation operation amplifiers U11A output end, the resistance R67 other ends are connected respectively to CPU and electric capacity C61 one end, electric capacity C61 other ends ground connection, resistance R68 one end concatenation operation amplifiers U11A negative input end, resistance R68 are another One end connection electric capacity C61 one end, resistance R69 and electric capacity C60 are connected in parallel on resistance R68 both ends, output earth terminal GND2 ground connection, electricity Hold C58, resistance RU3, RU4 are connected to differential signal outputs VOUT- between output earth terminal GND2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720787774.2U CN206876787U (en) | 2017-06-30 | 2017-06-30 | A kind of converter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720787774.2U CN206876787U (en) | 2017-06-30 | 2017-06-30 | A kind of converter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206876787U true CN206876787U (en) | 2018-01-12 |
Family
ID=61330771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720787774.2U Expired - Fee Related CN206876787U (en) | 2017-06-30 | 2017-06-30 | A kind of converter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206876787U (en) |
-
2017
- 2017-06-30 CN CN201720787774.2U patent/CN206876787U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |