CN204256428U - A kind of analog output module and motor protector - Google Patents
A kind of analog output module and motor protector Download PDFInfo
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- CN204256428U CN204256428U CN201420744392.8U CN201420744392U CN204256428U CN 204256428 U CN204256428 U CN 204256428U CN 201420744392 U CN201420744392 U CN 201420744392U CN 204256428 U CN204256428 U CN 204256428U
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- analog output
- output module
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- photoelectric isolating
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Abstract
The utility model discloses a kind of analog output module, belong to low-voltage electrical technical field.Analog output module of the present utility model, comprise microprocessor unit, photoelectric isolating circuit, voltage/current translation circuit, communication interface circuit, described photoelectric isolating circuit is connected with the PWM delivery outlet of microprocessor unit, communication interface circuit is connected with the communication port of MCU unit, and voltage/current translation circuit is connected with photoelectric isolating circuit.The invention also discloses a kind of motor protector.The utility model adopts independently modular design, freely can match according to user's request, and carries electrical isolation function, improves interference free performance.
Description
Technical field
The utility model relates to a kind of analog output module, particularly relates to a kind of analog output module for motor protector, belongs to low-voltage electrical technical field.
Background technology
Motor is as a kind of driving machinery; its use has penetrated into all trades and professions; it is the important guarantee that upper industry, agricultural, national defense construction and people's lives are normally carried out; along with the high speed development of modern electronic technology; Intelligent Asynohornized Protector is arisen at the historic moment; it is highly sensitive, cheap, workable, easy to maintenance, and on now, industry field has a wide range of applications.Therefore the design studies strengthening intelligent motor protector is an important topic of current era.
At present; motor protector is most with analog output function; analog output function is power industry field common function; general motor protector is with 4-20mA analog output function; but be all follow Ontology integration in a housing, match dumb, and adopt the analogue chip way of output of not isolating; poor anti jamming capability, also needs time user uses separately to join isolation module.
Utility model content
Technical problem to be solved in the utility model is to overcome prior art deficiency, provides a kind of analog output module, adopts independently modular design, freely can match according to user's request, and carries electrical isolation function, improves interference free performance.
A kind of analog output module, comprise microprocessor unit, photoelectric isolating circuit, voltage/current translation circuit, communication interface circuit, described photoelectric isolating circuit is connected with the PWM delivery outlet of microprocessor unit, communication interface circuit is connected with the communication port of microprocessor unit, and voltage/current translation circuit is connected with photoelectric isolating circuit.
Preferably, the photoelectric isolating circuit low-pass filter circuit, the voltage following buffers that comprise optocoupler and be connected successively with described optocoupler.
Preferably, described voltage/current translation circuit comprises Noninverting summing operation circuit, voltage follower.
A kind of motor protector can also be obtained according to identical invention thinking; comprise separate protector body and analog output module; described analog output module is analog output module described in above arbitrary technical scheme, and protector body communicates with analog output module by described communication interface circuit.
Compared to existing technology, the utility model has following beneficial effect:
The utility model adopts independently modular design, installs and uses flexibly, allows user freely to match according to actual needs;
The utility model adopts photoelectric isolating circuit to carry out electrical isolation, and interference free performance is greatly improved.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model analog output module;
Fig. 2 is the circuit diagram of photoelectric isolating circuit and voltage/current translation circuit in specific embodiment.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in detail:
The thinking of the utility model analog output module adopts independently modular design, and be provided with photoelectric isolating circuit to realize electrical isolation, its basic structure as shown in Figure 1, comprise microprocessor unit, photoelectric isolating circuit, voltage/current translation circuit, communication interface circuit, described photoelectric isolating circuit is connected with the PWM delivery outlet of microprocessor unit, communication interface circuit is connected with the communication port of microprocessor unit, and voltage/current translation circuit is connected with photoelectric isolating circuit.When for motor protector; protector body by described communication interface circuit and motor protector communicates to connect; the analog signals that the protector body that microprocessor unit receives motor protector sends, exports 4-20mA electric current by photoelectric isolating circuit, voltage/current translation circuit.
Fig. 2 shows photoelectric isolating circuit in the utility model preferred embodiment and voltage/current translation circuit, as shown in Figure 2, photoelectric isolating circuit is made up of electric capacity C1, resistance R1, electric capacity C2, high speed photo coupling PC1, resistance R2, electric capacity C3, amplifier U1A, electric capacity C4.In the present embodiment, optocoupler PC1 adopts ACPL-W340.1 pin of optocoupler PC1 is connected with resistance R1, electric capacity C2, another termination power VCC(+5V of R1), 3 pin of another termination optocoupler PC1 of electric capacity C2, the pwm signal produced by microprocessor unit sends into 3 pin of optocoupler PC1,4 pin of optocoupler PC1 connect the+15V power supply of isolation, the 5 pin connecting resistance R2 of optocoupler PC1,6 pin of optocoupler PC1 connect isolator, and 2 pin of PC1 are empty pin.Resistance R2 and electric capacity C3 forms low-pass filter circuit, and resistance R2 is connected with 3 pin of amplifier U1A, and 2 pin and 1 pin of amplifier U1A are connected to form voltage following buffers, strengthens signal.
Voltage-current converter circuit is made up of amplifier U1B, amplifier U1C, resistance R3, R4, R5, R6, R7, R8, triode Q1, electric capacity C5, because circuit introduces negative feedback, U1C, R3, R4, R5, R6 form Noninverting summing operation circuit, U1B, R7 form voltage follower, result is that the voltage signal current potential that R8 two terminal potential and photoelectric isolating circuit are sent is consistent, and uses Ohm law to show that the electric current flowing through R8 is 4 ~ 20MA.Triode Q1 is connected with 8 pin of amplifier U1C, for expanding the fan-out capability of electric current.Electric capacity C5 is used for filtering at output port.Pwm signal is pulse-width signal, changes the dutycycle of pwm signal, just through photoelectric isolating circuit isolation and after low-pass filtering, then can strengthen through voltage follower, converts obtain corresponding 4-20mA output current through voltage current transformating circuit.Amplifier U1 in the present embodiment adopts LM224, triode Q1 to adopt L9013.
Microprocessing unit and communication interface circuit belong to common technology, do not repeat them here.
Claims (6)
1. an analog output module, it is characterized in that, comprise microprocessor unit, photoelectric isolating circuit, voltage/current translation circuit, communication interface circuit, described photoelectric isolating circuit is connected with the PWM delivery outlet of microprocessor unit, communication interface circuit is connected with the communication port of microprocessor unit, and voltage/current translation circuit is connected with photoelectric isolating circuit.
2. analog output module as claimed in claim 1, is characterized in that, low-pass filter circuit, voltage following buffers that described photoelectric isolating circuit comprises optocoupler and is connected successively with described optocoupler.
3. analog output module as claimed in claim 2, it is characterized in that, the model of described optocoupler is ACPL-W340.
4. analog output module as described in any one of claims 1 to 3, is characterized in that, described voltage/current translation circuit comprises Noninverting summing operation circuit, voltage follower.
5. analog output module as claimed in claim 4, it is characterized in that, the output current scope of described voltage/current translation circuit is 4-20mA.
6. a motor protector; comprise separate protector body and analog output module; it is characterized in that; described analog output module is analog output module described in any one of Claims 1 to 5, and protector body communicates with analog output module by described communication interface circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420744392.8U CN204256428U (en) | 2014-12-01 | 2014-12-01 | A kind of analog output module and motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420744392.8U CN204256428U (en) | 2014-12-01 | 2014-12-01 | A kind of analog output module and motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204256428U true CN204256428U (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420744392.8U Active CN204256428U (en) | 2014-12-01 | 2014-12-01 | A kind of analog output module and motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204256428U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325742A (en) * | 2021-04-14 | 2021-08-31 | 珠海派诺科技股份有限公司 | Analog signal control circuit for motor protector |
-
2014
- 2014-12-01 CN CN201420744392.8U patent/CN204256428U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325742A (en) * | 2021-04-14 | 2021-08-31 | 珠海派诺科技股份有限公司 | Analog signal control circuit for motor protector |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |