CN206686066U - Frequency converter digital signal input end and frequency converter - Google Patents
Frequency converter digital signal input end and frequency converter Download PDFInfo
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- CN206686066U CN206686066U CN201720181812.XU CN201720181812U CN206686066U CN 206686066 U CN206686066 U CN 206686066U CN 201720181812 U CN201720181812 U CN 201720181812U CN 206686066 U CN206686066 U CN 206686066U
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Abstract
The utility model belongs to converter technology field, there is provided frequency converter digital signal input end and frequency converter.Frequency converter digital signal input end provided by the utility model is used to be connected between derived digital signal and controller, including mode control circuit and digital signal processing circuit, mode control circuit exports enable signal to controller to realize the selection of the signal processing model of controller, the output anti-misoperation signal of mode control circuit makes the output stabilization of digital signal processing circuit, and the digital output signal after processing is sent to controller by digital signal processing circuit.The utility model realizes frequency converter digital signal input end can realize the function consistent with the conventional inverter device with optocoupler in the case of without using optocoupler, reduce manufacturing cost.
Description
Technical field
The utility model belongs to converter technology field, more particularly to frequency converter digital signal input end and frequency converter.
Background technology
The control terminal circuit of frequency converter is connected with outside control circuit.The control terminal of frequency converter, with character of circuit
To divide, digital control terminal and simulation control terminal can be divided into；With the input of signal, export to divide, input signal end can be divided into
Son and output signal terminal.Digital signal input end, starting, stopping, reset, multistage speed operation etc. can be completed to frequency converter and is controlled
System.
Existing frequency converter digital signal input end is mainly passed through by jumper terminal, diode, resistance, electric capacity and optocoupler
Electrical connection is realized.The data signal of input terminal is connected to light by the front stage circuits of the compositions such as diode, resistance and electric capacity
Coupling primary side, controlled by the break-make of optocoupler, data signal is finally sent to digital signal processing chip by optical coupling secondary edges.It is existing
Frequency converter product typically has 4-7 railway digitals signal input terminal and provides expanded function, then needs to use 4-7 or more
Optocoupler, because the price of optocoupler in itself is higher, cause production cost high.Therefore, existing frequency converter digital signal input end
The problem of cost is high be present because being realized using optocoupler in son.
Utility model content
The purpose of this utility model is to provide frequency converter digital signal input end and frequency converter, it is intended to solves existing skill
The problem of frequency converter digital signal input end present in art uses optocoupler to realize, cost is high.
First aspect of the present utility model, there is provided frequency converter digital signal input end, for being connected to data signal
Between source and controller, including mode control circuit and digital signal processing circuit；
First output end of the mode control circuit connects the first input end of the controller, the Schema control electricity
The first input end of the second output end connection digital signal processing circuit on road, the second of the digital signal processing circuit
Input connects the output end of the derived digital signal, and the output end of the digital signal processing circuit connects the controller
Second input；
The mode control circuit output enable signal makes the controller determine corresponding signal processing model, the mould
Formula control circuit output anti-misoperation signal is used for the output voltage for stablizing the digital signal processing circuit, the data signal
The digital source signal that process circuit exports according to the derived digital signal obtains data signal and exported to the controller.
Second aspect of the present utility model, there is provided frequency converter, including above-mentioned frequency converter digital signal input end.
The utility model in frequency converter digital signal input end by using at mode control circuit and data signal
Circuit is managed, controller is determined corresponding signal processing model, mode control circuit by mode control circuit output enable signal
Output anti-misoperation signal is used for the output voltage for stablizing digital signal processing circuit, and digital signal processing circuit is believed according to numeral
The digital source signal of number source output obtains data signal and exported to controller, so that frequency converter digital signal input end exists
The function consistent with the conventional inverter device with optocoupler can be realized in the case of without using optocoupler, reduces manufacturing cost.
Brief description of the drawings
Fig. 1 is the structure chart for frequency converter digital signal input end that the utility model embodiment is provided；
Fig. 2 is the exemplary circuit structure for frequency converter digital signal input end that the utility model first embodiment is provided
Figure；
Fig. 3 is the exemplary circuit structure for frequency converter digital signal input end that the utility model second embodiment is provided
Figure.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
The utility model embodiment in frequency converter digital signal input end by using mode control circuit and numeral
Signal processing circuit, controller is set to determine corresponding signal processing model, pattern control by mode control circuit output enable signal
Circuit output anti-misoperation signal processed is used to stablizing the output voltage of digital signal processing circuit, digital signal processing circuit according to
The digital source signal of derived digital signal output obtains data signal and exported to controller, so that frequency converter data signal inputs
Terminal can realize the function consistent with the conventional inverter device with optocoupler in the case of without using optocoupler, reduce manufacture
Cost.
Fig. 1 shows the structure for frequency converter digital signal input end that the utility model embodiment is provided, in order to just
In explanation, the part related to the utility model embodiment is illustrate only, details are as follows：
Frequency converter digital signal input end, for being connected between derived digital signal 300 and controller 400, including mould
Formula control circuit 100 and digital signal processing circuit 200.
The first input end of the first output end connection controller 400 of mode control circuit 100, mode control circuit 100
The second output end connection digital signal processing circuit 200 first input end, digital signal processing circuit 200 second input
The output end of end connection derived digital signal 300, the second of the output end connection controller 400 of digital signal processing circuit 200 are defeated
Enter end.
Mode control circuit 100, which exports enable signal, makes the controller 400 determine corresponding signal processing model, pattern
Control circuit 100 exports the output voltage that anti-misoperation signal is used to stablize digital signal processing circuit 200, Digital Signal Processing
The digital source signal that circuit 200 exports according to derived digital signal 300 obtains data signal and exported to controller 400.
In the utility model embodiment, derived digital signal 300 is the derived digital signal of user's access.Controller 400 is
Digital signal processing chip, such as DSP (Digital Signal Processing, Digital Signal Processing) chips or FPGA
(Field Programmable Gate Array, field programmable gate array) chip etc..
Mode control circuit 100, which exports enable signal, makes controller 400 determine corresponding signal processing model.Specifically,
As a kind of embodiment, when the enable signal that the first input end of controller 400 receives is low level, its second input
The data signal that end receives is effective for high level；When the enable signal that the first input end of controller 400 receives is high level,
The data signal that its second input receives is effective for low level.
Mode control circuit 100 exports anti-misoperation signal to digital signal processing circuit 200, primarily to ensureing
The no signal of derived digital signal 300 inputs (i.e. the second input of digital signal processing circuit 200 of digital signal processing circuit 200
When vacantly), the output of digital signal processing circuit 200 is still stablized, and avoids the output error signal of digital signal processing circuit 200
To controller 400 so as to cause controller 400 occur maloperation.By taking concrete condition as an example, when digital signal processing circuit 200
When second input is hanging, its digital source signal received is unstable signal (voltage may be high, it is also possible to be low), then may be used
Maloperation, such as the hand contact electrostatic of operator can be caused to cause a high level input by outside, so as to cause
Trigger controller.Anti-misoperation signal is used to avoid such case, ensures that the output voltage of digital signal processing circuit 200 is steady
It is fixed.
The digital source signal that digital signal processing circuit 200 exports according to derived digital signal 300 obtains data signal and defeated
Go out to controller 400.Specifically, digital signal processing circuit 200 is handled digital source signal, obtained numeral letter is adjusted
Number controller 400 allow input voltage range in.
Retouched in detail below in conjunction with specific implementation of the specific embodiment to above-mentioned frequency converter digital signal input end
State：
Embodiment one：
Fig. 2 shows the exemplary circuit for frequency converter digital signal input end that the utility model first embodiment is provided
Structure, for convenience of description, the part related to the utility model first embodiment is illustrate only, details are as follows：
As the embodiment of the utility model one, mode control circuit 100 includes：
First connector, resistance R1, resistance R2, electric capacity C1, diode D1 and diode D2.
First the first power supply V1 of termination of the first connector, the second end of the first connector is the second of mode control circuit
Output end, the second end connection resistance R1 of the first connector first end, resistance R1 the second end are the of mode control circuit
One output end, resistance R1 the second end connect the positive pole of resistance R2 first end, electric capacity C1 first end and diode D1 simultaneously,
Resistance R2 the second end and electric capacity C1 the second end common ground, diode D1 positive pole connect diode D2 negative pole, diode
D2 plus earth, diode D1 negative pole meet second source V2.
Specifically, the first connector can be a variety of connectors or switch etc..
Specifically, the first power supply V1 and second source V2 are dc source, can be arranged as required to as different voltages etc.
Level.First power supply V1 and second source V2 can be provided in power module in mode control circuit 100 or outer
Connect power supply.
Specifically, in the utility model first embodiment, the first connector is row's pin J1.
As the embodiment of the utility model one, digital signal processing circuit 200 includes：
Resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, electric capacity C3, diode D3, diode D4 and diode
D5。
The diode D3 just extremely first input end of digital signal processing circuit, diode D3 negative pole connecting resistance R6's
First end, resistance R6 the second end are the second input of digital signal processing circuit, and resistance R6 the second end connects electricity simultaneously
Hinder R7 first end and resistance R8 first end, resistance R8 the second end is the output end of digital signal processing circuit, resistance R8
The second end simultaneously connecting resistance R9 first end, resistance R10 first end, electric capacity C3 first end and diode D4 just
Pole, second end at resistance R7 the second end, resistance R9 the second end and electric capacity C3 are connected to ground, resistance R10 the second end and two altogether
The 5th power supply V5 of connection, diode D4 positive pole connect diode D5 negative pole, diode D5 positive pole to pole pipe D4 negative pole jointly
Ground connection.
Specifically, the 5th power supply V5 is dc source, can be arranged as required to as different voltage class.5th power supply V5 can
To be provided in power module or external power supply in digital signal processing circuit 200.
Specifically, in the utility model first embodiment, controller 400 is Digital Signal Processing (DSP) chip.
Above-mentioned frequency converter digital signal input end is described further below in conjunction with operation principle：
As shown in Fig. 2 the enable signal of the first output end output of mode control circuit 100 is EN signals, the second output
The anti-misoperation signal of end output is Source signals.The digital source that second input of digital signal processing circuit 200 receives
Signal is D_IN signals, and the data signal of output end output is D_OUT signals.
During work, in mode control circuit 100, the first power supply V1 and second source V2 can be adjusted to according to different designs
Different voltage class.Row's pin J1 1 pin is connected to the first power supply V1；Electric capacity C1 strobes；Diode D1 and diode
A D2 end is connected to second source V2, and one end ground connection, main function is by node voltage VDClamper is between 0~V2, so as to protect
Card is input to the EN signals of dsp chip first input end in the voltage range for allowing input, avoids dsp chip excessive pressure damages.
When row pin J1 1,2 pin not short circuit, Source signals are pulled to ground by resistance R1, resistance R2, similarly EN signals
Also ground is pulled to, i.e., Source signals are 0V, and EN signals are low level state, and the D_OUT signals for now inputting dsp chip are height
Level is effective；
When row pin J1 1,2 pin short circuits, Source signals connect with the first power supply V1, and resistance R1, resistance R2 form partial pressure
Circuit, now EN signals be equal to the voltage at resistance R2 both ends, i.e. Source signals are equal to V1, and EN signals are high level state, this
When input dsp chip D_OUT signals for low level it is effective.
During work, in digital signal processing circuit 200, resistance R7, resistance R8 series connection after it is in parallel with resistance R9, then with electricity
Hinder R10 and form bleeder circuit, partial pressure, the voltage that the 5th power supply V5 buttons are gone after resistance R10 both end voltages are carried out to the 5th power supply V5
Dsp chip is sent to by D_OUT signals, so as to ensure that the second input of dsp chip has the level of a determination, this level
Fall the intermediate area in low level and high level, no matter arrange in mode control circuit 100 pin J1 1,2 pin whether short circuit,
All ensure the second input in mode control circuit 100 it is hanging i.e. without D_IN signals when, maloperation does not occur for dsp chip.Number
In word signal processing circuit 200, D_IN signals are digital source signal, are accessed by user；Diode D3 is preventing negative electricity from overwhelming
Perfusion is to Source signal ends；Electric capacity C3 strobes in circuit；Resistance R8 is primarily to prevent from being input to DSP cores
The D_OUT signal codes of piece exceed its maximum for allowing input, cause dsp chip overcurrent damage, play metering function；Diode
The D_OUT signal voltages that D4 and diode D5 will enter into dsp chip are clamped between 0V~V2, prevent dsp chip excessive pressure damages,
Play clamping action.
To sum up, when arranging pin J1 1,2 pin not short circuit, Source signals are 0V, and EN signals are low level state, D_OUT
For voltages of the 5th power supply V5 after partial pressure clamper, now D_IN signals are that high level is effective.When row pin J1 1,2 pin short circuits
When, Source signals are equal to V1, and EN signals are high level state, and now D_IN signals are that low level is effective.
It follows that the level of Source signals always the significant level with D_IN signals on the contrary, so ensuring that
Controller 400 is not in that (user what when not connecing, Digital Signal Processing electricity for maloperation when as user, what does not connect
Second input on road 200 is hanging, not know level).So Source effect is exactly to digital signal processing circuit
The level of 200 one determination of first input end, ensures that user does not access signal, controller 400, which works, not to malfunction.
If user does not access D_IN signals, when the second input of digital signal processing circuit 200 is hanging, level may
For height, it is also possible to be low, may thus cause maloperation, such as the hand contact electrostatic of operator to cause by outside
One high level input, Source signals are exactly mainly to avoid such case, avoid external trigger.
Embodiment two：
Fig. 3 shows the exemplary circuit for frequency converter digital signal input end that the utility model second embodiment is provided
Structure, for convenience of description, the part related to the utility model second embodiment is illustrate only, details are as follows：
As the embodiment of the utility model one, mode control circuit 100 includes：
Second connector, resistance R3, resistance R4, electric capacity C2, switching tube 101 and resistance R5；
First the 3rd power supply V3 of termination of the second connector, the second end of the second connector is the second of mode control circuit
Output end, the second end connection resistance R3 of the second connector first end, resistance R3 the second end connect the of resistance R4 simultaneously
The controlled end of one end, electric capacity C2 first end and switching tube 101, resistance R4 the second end connect jointly with electric capacity C2 the second end
Ground, the hot end of switching tube 101 are the first output end of mode control circuit, the hot end connecting resistance R5 of switching tube 101
First end, resistance R5 second termination the 4th power supply V4, switching tube 101 cold end ground connection.
Specifically, above-mentioned switching tube 101 is NPN type triode Q1, NPN type triode Q1 base stage is switching tube 101
Controlled end, the hot end of NPN type triode Q1 current collection extremely switching tube 101, NPN type triode Q1 transmitting extremely switch
The cold end of pipe 101.
Specifically, the second connector is row's pin J2.
Specifically, the 3rd power supply V3 and the 4th power supply V4 are dc source, can be arranged as required to as different voltages etc.
Level.3rd power supply V3 and the 4th power supply V4 can be provided in mode control circuit 100 power module or external
Power supply.
Above-mentioned frequency converter digital signal input end is described further below in conjunction with operation principle：
As shown in figure 3, the enable signal of the first output end output of mode control circuit 100 is EN ' signals, the second output
The anti-misoperation signal of end output is Source ' signals.The digital source that second input of digital signal processing circuit 200 receives
Signal is D_IN ' signals, and the data signal of output end output is D_OUT ' signals.
During work, in mode control circuit 100, when row's pin J2 short circuits, output EN ' signals are low levels；When row pin J2 breaks
Open, output EN ' signals are high level.
When row's pin J2 short circuits, triode Q1 base stage high voltage, triode Q1 be in saturation conduction state, colelctor electrode with
Emitter stage turns on, equivalent to the conducting state of switch between collector and emitter.
Saturation conduction state is：When the voltage for being added in triode Q1 emitter junctions is more than the conducting voltage of PN junction, and work as base stage
When electric current is increased to a certain extent, collector current no longer increases with the increase of base current, but is in certain certain value
Nearby less change, at this moment triode Q1 loses Current amplifier effect, the voltage very little between colelctor electrode and emitter stage, current collection
Equivalent to the conducting state of switch between pole and emitter stage.
When row pin J2 disconnects, triode Q1 is in cut-off state, and collector and emitter disconnects.
Cut-off state is：When be added in triode Q1 emitter junctions voltage be less than PN junction conducting voltage, base current zero,
Collector current and emitter current are all zero, triode Q1 now lose Current amplifier effect, collector and emitter it
Between equivalent to switch off-state.
The internal junction of digital signal processing circuit 200 in frequency converter digital signal input end that the present embodiment is provided
Structure is identical with the internal structure for the digital signal processing circuit 200 that the utility model first embodiment is provided, therefore no longer superfluous
State.
The utility model embodiment in frequency converter digital signal input end by using the He of mode control circuit 100
Digital signal processing circuit 200, enable signal is exported to controller 400 by mode control circuit 100 to realize controller 400
Signal processing model selection, the output anti-misoperation signal of mode control circuit 100 makes digital signal processing circuit 200
Output is stable, and the digital output signal after processing is sent to controller 400 by digital signal processing circuit 200, so that frequency conversion
Device digital signal input end can be realized consistent with the conventional inverter device with optocoupler in the case of without using optocoupler
Function, reduces manufacturing cost, and it is simple in construction, circuit threshold value adjusting range is wide, can apply on frequency converter product, have
Very strong adaptability and practicality.
Based on the advantage of above-mentioned frequency converter digital signal input end, the utility model embodiment additionally provides a kind of frequency conversion
Device, it includes above-mentioned frequency converter digital signal input end.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (9)
1. frequency converter digital signal input end is sub, for being connected between derived digital signal and controller, it is characterised in that：Including
Mode control circuit and digital signal processing circuit；
First output end of the mode control circuit connects the first input end of the controller, the mode control circuit
Second output end connects the first input end of the digital signal processing circuit, the second input of the digital signal processing circuit
End connects the output end of the derived digital signal, and the output end of the digital signal processing circuit connects the second of the controller
Input；
The mode control circuit output enable signal makes the controller determine corresponding signal processing model, the pattern control
Circuit output anti-misoperation signal processed is used for the output voltage for stablizing the digital signal processing circuit, the Digital Signal Processing
The digital source signal that circuit exports according to the derived digital signal obtains data signal and exported to the controller.
2. frequency converter digital signal input end according to claim 1, it is characterised in that the mode control circuit bag
Include：
First connector, resistance R1, resistance R2, electric capacity C1, diode D1 and diode D2；
First the first power supply of termination of first connector, the second end of first connector is the mode control circuit
The second output end, the second end of first connector connects the first end of the resistance R1, the second end of the resistance R1
For the first output end of the mode control circuit, the second end of the resistance R1 connect simultaneously the first end of the resistance R2,
The positive pole of the first end of the electric capacity C1 and the diode D1, the second end of the resistance R2 and the second end of the electric capacity C1
Common ground, the positive pole of the diode D1 connect the negative pole of the diode D2, the plus earth of the diode D2, and described two
Pole pipe D1 negative pole connects second source.
3. frequency converter digital signal input end according to claim 2, it is characterised in that：First connector is row
Pin J1.
4. frequency converter digital signal input end according to claim 1, it is characterised in that the mode control circuit bag
Include：
Second connector, resistance R3, resistance R4, electric capacity C2, switching tube and resistance R5；
First the 3rd power supply of termination of second connector, the second end of second connector is the mode control circuit
The second output end, the second end of second connector connects the first end of the resistance R3, the second end of the resistance R3
The first end, the first end of the electric capacity C2 and the controlled end of the switching tube of the resistance R4, the resistance R4 are connected simultaneously
The second end and the electric capacity C2 the second end common ground, the hot end of the switching tube is the mode control circuit
First output end, the high potential of the switching tube terminate the first end of the resistance R5, the second termination the 4th of the resistance R5
Power supply, the cold end ground connection of the switching tube.
5. frequency converter digital signal input end according to claim 4, it is characterised in that：The switching tube is NPN type
Triode Q1, the NPN type triode Q1 base stage be the switching tube controlled end, the current collection of the NPN type triode Q1
The hot end of extremely described switching tube, the cold end of the extremely described switching tube of transmitting of the NPN type triode Q1.
6. frequency converter digital signal input end according to claim 4, it is characterised in that：Second connector is row
Pin J2.
7. frequency converter digital signal input end according to claim 1, it is characterised in that the Digital Signal Processing electricity
Road includes：
Resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, electric capacity C3, diode D3, diode D4 and diode D5；
The first input end of the just extremely described digital signal processing circuit of the diode D3, the negative pole of the diode D3 connect
The first end of the resistance R6, the second end of the resistance R6 is the second input of the digital signal processing circuit, described
Resistance R6 the second end connects the first end of the resistance R7 and the first end of the resistance R8 simultaneously, and the second of the resistance R8
Hold and connect the first of the resistance R9 simultaneously for the output end of the digital signal processing circuit, the second end of the resistance R8
The positive pole at end, the first end of the resistance R10, the first end of the electric capacity C3 and the diode D4, the of the resistance R7
Second end at two ends, the second end of the resistance R9 and the electric capacity C3 is connected to ground, the second end of the resistance R10 and described altogether
Diode D4 negative pole the 5th power supply of connection jointly, the positive pole of the diode D4 connect the negative pole of the diode D5, and described two
Pole pipe D5 plus earth.
8. frequency converter digital signal input end according to claim 1, it is characterised in that：The controller is believed for numeral
Number process chip.
9. frequency converter, it is characterised in that：Including frequency converter digital signal input end as described in claim any one of 1-8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720181812.XU CN206686066U (en) | 2017-02-27 | 2017-02-27 | Frequency converter digital signal input end and frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720181812.XU CN206686066U (en) | 2017-02-27 | 2017-02-27 | Frequency converter digital signal input end and frequency converter |
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| CN206686066U true CN206686066U (en) | 2017-11-28 |
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ID=60392331
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712464A (en) * | 2017-02-27 | 2017-05-24 | 华远电气股份有限公司 | Frequency converter digital signal input terminal and frequency converter |
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2017
- 2017-02-27 CN CN201720181812.XU patent/CN206686066U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712464A (en) * | 2017-02-27 | 2017-05-24 | 华远电气股份有限公司 | Frequency converter digital signal input terminal and frequency converter |
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