CN207460040U - The signal input circuit of stepper motor driver - Google Patents
The signal input circuit of stepper motor driver Download PDFInfo
- Publication number
- CN207460040U CN207460040U CN201721369712.6U CN201721369712U CN207460040U CN 207460040 U CN207460040 U CN 207460040U CN 201721369712 U CN201721369712 U CN 201721369712U CN 207460040 U CN207460040 U CN 207460040U
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- China
- Prior art keywords
- diode
- circuit
- high speed
- connects
- resistance
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- Expired - Fee Related
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- Control Of Stepping Motors (AREA)
Abstract
The utility model discloses a kind of signal input circuits of stepper motor driver, including optical coupling isolation circuit, further include the input terminal that constant-current circuit connects the optical coupling isolation circuit, the constant-current circuit includes triode Q1, resistance R1, resistance R3, diode D1 and diode D2, the diode D1 connects in circuit with the diode D2, one end of the resistance R3 connects the base stage of the triode Q1 and the anode of diode D1, the other end accesses the input terminal of the optical coupling isolation circuit, the collector of the triode Q1 connects the input terminal of the optical coupling isolation circuit, the emitter series resistance R1 of the triode and the cathode for connecting the diode D2.By using constant-current circuit current-limiting resistance is replaced to carry out constant current processing to the signal voltage that higher controller provides, stable input current is provided for optocoupler.
Description
Technical field
The utility model is related to stepper motor technical fields, and in particular to a kind of signal input electricity of stepper motor driver
Road.
Background technology
Existing stepper motor driver circuit, the recommended current of the optocoupler in circuit has the scope of restriction, and flows
Electric current through optocoupler is adjusted by current-limiting resistance, if current-limiting resistance can cause optocoupler with the signal voltage mismatch of input
Owe conducting or supersaturation, to photoelectric coupled circuit by square wave frequency scope and interference filtering ability can all have an impact, seriously
When can even burn current-limiting resistance and optocoupler.So different current-limiting resistances is needed replacing for different higher controllers, together
Sample stepper motor because matched higher controller is different, be supplied to stepper motor driver signal voltage also have it is several not
With, it is also desirable to several different models are subdivided into, so to purchasing, producing, getting ready the goods all brings very big trouble.
Utility model content
The purpose of this utility model is to provide a kind of signal input circuits of safe and convenient stepper motor driver.
Technical solution is used by the signal input circuit of stepper motor driver disclosed in the utility model：A kind of step
The signal input circuit of stepper motor driver including optical coupling isolation circuit, has further included constant-current circuit and has connected the light-coupled isolation
The input terminal of circuit.
The constant-current circuit includes triode Q1, resistance R1, resistance R3, diode D1 and diode D2, the diode
D1 connects in circuit with the diode D2, and one end of the resistance R3 connects the base stage and diode D1 of the triode Q1
Anode, the other end accesses the input terminal of the optical coupling isolation circuit.The collector of the triode Q1 connect the optocoupler every
Input terminal from circuit, the emitter series resistance R1 of the triode and the cathode for connecting the diode D2.
Preferably, the optical coupling isolation circuit includes high speed photo coupling U1, capacitance C1, capacitance C2, resistance R2.It is described
One end of capacitance C1 connects the anode of the high speed photo coupling U1, and the other end connects the cathode of the high speed photo coupling U1；The capacitance
One end of C2 connects the emitter of the high speed photo coupling U1, and the other end connects the collector of the high speed photo coupling U1；The resistance
One end of R2 connects the collector of the high speed photo coupling U1, and the other end connects the base stage of the high speed photo coupling U1.
Preferably, the collector of the high speed photo coupling U1 is connected with output terminal, the transmitting of the high speed photo coupling U1
Pole is grounded, the base stage connection Input voltage terminal of the high speed photo coupling U1.
Preferably, the series circuit that the diode D1 and the diode D2 are formed can also use voltage stabilizing two
Pole pipe is replaced.
Preferably, the optocoupler model TLP109.
The signal input circuit of stepper motor driver provided by the utility model, by the diode D1 of constant-current circuit,
Diode D2 and resistance R3 provides stable base voltage to triode Q1, and the defeated of optocoupler is limited by the resistance value size of resistance R1
Enter size of current and from the influence of input voltage, the electric current that constant-current circuit replacement current-limiting resistance flows into high speed photo coupling is steady
Fixed optimal input current, the utility model provide a kind of signal input circuit of safe and convenient stepper motor driver.
Description of the drawings
Fig. 1 is the schematic diagram of the signal input circuit of the utility model stepper motor driver.
Specific embodiment
The utility model is further elaborated and illustrated with reference to specific embodiment and Figure of description：It refer to figure
1, a kind of signal input circuit of stepper motor driver including optical coupling isolation circuit 20, has further included constant-current circuit 10 and has connected
The input terminal of the optical coupling isolation circuit 20.
The constant-current circuit 10 includes triode Q1, resistance R1, resistance R3, diode D1 and diode D2, two pole
Pipe D1 connects in circuit with the diode D2, and one end of the resistance R3 connects the base stage and diode of the triode Q1
The anode of D1, the other end access the input terminal of the optical coupling isolation circuit 20.The collector of the triode Q1 connects the light
The input terminal of coupling isolation circuit 20, the emitter series resistance R1 of the triode and the cathode for connecting the diode D2.Institute
Stating the series circuit that diode D1 and the diode D2 are formed can also be replaced with zener diode.
Need what is illustrated, the optical coupling isolation circuit 20 includes high speed photo coupling U1, capacitance C1, capacitance C2, resistance R2.It is described
The collector of high speed photo coupling U1 is connected with output terminal, the emitter ground connection of the high speed photo coupling U1, the base of the high speed photo coupling U1
Pole connects Input voltage terminal.The optocoupler model TLP109.
One end of the capacitance C1 connects the anode of the high speed photo coupling U1, and the other end connects the moon of the high speed photo coupling U1
Pole；One end of the capacitance C2 connects the emitter of the high speed photo coupling U1, and the other end connects the current collection of the high speed photo coupling U1
Pole；One end of the resistance R2 connects the collector of the high speed photo coupling U1, and the other end connects the base stage of the high speed photo coupling U1.
The signal input circuit of stepper motor driver provided by the utility model, by the diode D1 of constant-current circuit,
Diode D2 and resistance R3 provides stable base voltage to triode Q1, and the defeated of optocoupler is limited by the resistance value size of resistance R1
Enter size of current and from the influence of input voltage, the electric current that constant-current circuit replacement current-limiting resistance flows into high speed photo coupling is steady
Fixed optimal input current, the utility model provide a kind of signal input circuit of safe and convenient stepper motor driver.
Finally it should be noted that above example is only to illustrate the technical solution of the utility model rather than to this reality
With the limitation of novel protected scope, although being explained in detail with reference to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be modified or replaced equivalently to the technical solution of the utility model, without departing from this
The spirit and scope of utility model technical solution.
Claims (5)
1. a kind of signal input circuit of stepper motor driver, including optical coupling isolation circuit, it is characterised in that：It further includes persevering
Current circuit connects the input terminal of the optical coupling isolation circuit；The constant-current circuit includes triode Q1, resistance R1, resistance R3, two
Pole pipe D1 and diode D2, the diode D1 connect in circuit with the diode D2, one end connection of the resistance R3
The base stage of the triode Q1 and the anode of diode D1, the input terminal of the other end access optical coupling isolation circuit, described three
The collector of pole pipe Q1 connects the optical coupling isolation circuit input terminal, and the emitter series resistance R1 of the triode simultaneously connects institute
State the cathode of diode D2.
2. the signal input circuit of stepper motor driver as described in claim 1, it is characterised in that：The light-coupled isolation electricity
The one end of road including high speed photo coupling U1, capacitance C1, capacitance C2, resistance R2, the capacitance C1 connects the sun of the high speed photo coupling U1
Pole, the other end connect the cathode of the high speed photo coupling U1；One end of the capacitance C2 connects the emitter of the high speed photo coupling U1,
The other end connects the collector of the high speed photo coupling U1；One end of the resistance R2 connects the collector of the high speed photo coupling U1,
The other end connects the base stage of the high speed photo coupling U1.
3. the signal input circuit of stepper motor driver as claimed in claim 2, it is characterised in that：The high speed photo coupling U1
Collector be connected with output terminal, the emitter ground connection of the high speed photo coupling U1, the base stage connection input of the high speed photo coupling U1
Voltage end.
4. the signal input circuit of stepper motor driver as described in claim 1, it is characterised in that：The diode D1 and
The series circuit that the diode D2 is formed can also be replaced with zener diode.
5. the signal input circuit of stepper motor driver as claimed in claim 3, it is characterised in that：The high speed photo coupling type
Number be TLP109.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721369712.6U CN207460040U (en) | 2017-10-23 | 2017-10-23 | The signal input circuit of stepper motor driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721369712.6U CN207460040U (en) | 2017-10-23 | 2017-10-23 | The signal input circuit of stepper motor driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207460040U true CN207460040U (en) | 2018-06-05 |
Family
ID=62281221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721369712.6U Expired - Fee Related CN207460040U (en) | 2017-10-23 | 2017-10-23 | The signal input circuit of stepper motor driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207460040U (en) |
-
2017
- 2017-10-23 CN CN201721369712.6U patent/CN207460040U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Tu Zuxin Inventor after: Liu Xu Inventor before: Tu Zuxin Inventor before: Liu Xu |
|
| CB03 | Change of inventor or designer information | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180605 Termination date: 20201023 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |