CN204425317U - A kind of buffer circuit of servo-driver - Google Patents
A kind of buffer circuit of servo-driver Download PDFInfo
- Publication number
- CN204425317U CN204425317U CN201520208943.3U CN201520208943U CN204425317U CN 204425317 U CN204425317 U CN 204425317U CN 201520208943 U CN201520208943 U CN 201520208943U CN 204425317 U CN204425317 U CN 204425317U
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- resistance
- optocoupler
- circuit
- fan
- optical coupling
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Abstract
The utility model discloses a kind of buffer circuit of servo-driver, comprise optical coupling isolation circuit, and the fan work circuit to be connected with optical coupling isolation circuit, described optical coupling isolation circuit comprises the first to the 3rd resistance and the first optocoupler, one end of described second resistance is connected with+5V power supply, and the other end is connected with the input anode of the first optocoupler by after the 3rd resistance; The input cathode of the first optocoupler and the equal ground connection of output emitter, the output collector electrode of the first optocoupler is connected with+5V power supply through the first resistance, and the output collector electrode of the first optocoupler is also connected with fan work circuit.The utility model is by arranging optical coupling isolation circuit and fan work circuit, control signal was first carried out signal isolation through optical coupling isolation circuit and is amplified before entering fan work circuit, avoid the distortion of signal, then control the work of fan by fan work circuit.
Description
Technical field
The utility model relates to servo-driver technical field, more particularly, and particularly a kind of buffer circuit of servo-driver.
Background technology
Along with the development of power electronic technology, microelectric technique and modern control theory, servo-driver is widely used in industry-by-industry.Can produce a large amount of heats in the servo-driver course of work, be worked by radiator to dispel the heat, and the work of radiator is controlled by fan control circuitry in prior art always.Owing to being subject to the interference of fan in the course of the work, easily there is distortion in control signal.Cause fan can not accurately carry out work.Therefore, be necessary to design a kind of buffer circuit that can prevent distorted signals.
Utility model content
The purpose of this utility model is to provide a kind of buffer circuit that can prevent the servo-driver of control signal distortion.
In order to achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of buffer circuit of servo-driver, comprise optical coupling isolation circuit, and the fan work circuit to be connected with optical coupling isolation circuit, described optical coupling isolation circuit comprises the first to the 3rd resistance and the first optocoupler, one end of described second resistance is connected with+5V power supply, and the other end is connected with the input anode of the first optocoupler by after the 3rd resistance; The input cathode of the first optocoupler and the equal ground connection of output emitter, the output collector electrode of the first optocoupler is connected with+5V power supply through the first resistance, and the output collector electrode of the first optocoupler is also connected with fan work circuit.
Preferably, described fan work circuit comprises the 4th resistance, the 5th resistance, the second optocoupler, switching circuit and fan terminal; The input anode of described second optocoupler is connected with the output collector electrode of the first optocoupler by the 4th resistance, its input cathode ground connection, and its output emitter, output collector electrode are all connected with switching circuit; Between the input anode that described 5th resistance is connected to the second optocoupler and negative pole, described fan terminal is connected with switching circuit.
Preferably, described switching circuit comprises the 6th resistance, the 7th resistance, electric capacity, triode and relay; Described one end of 6th resistance is connected with the output emitter of the second optocoupler, and the other end is connected with the base stage of triode; Described 7th resistance and electric capacity parallel with one another after be connected between the base stage of triode and ground; The collector electrode of described triode is by being connected with power supply VCC after the main coil of relay, and the grounded emitter of triode, the main contacts of described relay is connected between+12V power supply and fan terminal.
Compared with prior art, the utility model has the advantage of: the utility model is by arranging optical coupling isolation circuit and fan work circuit, control signal was first carried out signal isolation through optical coupling isolation circuit and is amplified before entering fan work circuit, avoid the distortion of signal, then control the work of fan by fan work circuit.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of the buffer circuit of servo-driver described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, to make advantage of the present utility model and feature can be easier to be readily appreciated by one skilled in the art, thus more explicit defining is made to protection range of the present utility model.
Consult shown in Fig. 1, the utility model provides a kind of buffer circuit of servo-driver, comprise optical coupling isolation circuit 1, and the fan work circuit 2 to be connected with optical coupling isolation circuit 1, described optical coupling isolation circuit 1 comprises the first to the 3rd resistance R1-R3 and the first optocoupler U1, one end of described second resistance R2 is connected with+5V power supply, and the other end is connected with the input anode of the first optocoupler U1 by after the 3rd resistance R3; The input cathode of the first optocoupler U1 and the equal ground connection of output emitter, the output collector electrode of the first optocoupler U1 is connected with+5V power supply through the first resistance R1, and the output collector electrode of the first optocoupler U1 is also connected with fan work circuit 2.
In the utility model, described fan work circuit 2 comprises the 4th resistance R4, the 5th resistance R5, the second optocoupler U2, switching circuit and fan terminal J; The input anode of described second optocoupler U2 is connected with the output collector electrode of the first optocoupler U1 by the 4th resistance R4, its input cathode ground connection, and its output emitter, output collector electrode are all connected with switching circuit; Between the input anode that described 5th resistance R5 is connected to the second optocoupler U2 and negative pole, described fan terminal J is connected with switching circuit.
In the utility model, described switching circuit comprises the 6th resistance R6, the 7th resistance R7, electric capacity C1, triode Q1 and relay K; One end of described 6th resistance R6 is connected with the output emitter of the second optocoupler U2, and the other end is connected with the base stage of triode Q1; Between the base stage being connected to triode Q1 after described 7th resistance R7 and electric capacity C1 is parallel with one another and ground; The collector electrode of described triode Q1 is by being connected with power supply VCC after the main coil of relay K, and the grounded emitter of triode Q1, the main contacts of described relay K is connected between+12V power supply and fan terminal J.
The operation principle of the buffer circuit of servo-driver of the present utility model is: input signal FAN-I is inputted by the first optocoupler U1 and enters the second optocoupler U2 after exporting, finally export the conducting controlling triode Q1 or shutoff, now under the effect of relay K, fan terminal J realizes and+12V power turn-on or shutoff, and then realizes the open and close of fan.The utility model is by arranging optical coupling isolation circuit and fan work circuit, control signal was first carried out signal isolation through optical coupling isolation circuit and is amplified before entering fan work circuit, avoid the distortion of signal, then control the work of fan by fan work circuit.
Although describe execution mode of the present utility model by reference to the accompanying drawings; but patent owner can make various distortion or amendment within the scope of the appended claims; as long as be no more than the protection range described by claim of the present utility model, all should within protection range of the present utility model.
Claims (3)
1. the buffer circuit of a servo-driver, it is characterized in that: comprise optical coupling isolation circuit, and the fan work circuit to be connected with optical coupling isolation circuit, described optical coupling isolation circuit comprises the first to the 3rd resistance and the first optocoupler, one end of described second resistance is connected with+5V power supply, and the other end is connected with the input anode of the first optocoupler by after the 3rd resistance; The input cathode of the first optocoupler and the equal ground connection of output emitter, the output collector electrode of the first optocoupler is connected with+5V power supply through the first resistance, and the output collector electrode of the first optocoupler is also connected with fan work circuit.
2. the buffer circuit of servo-driver according to claim 1, is characterized in that: described fan work circuit comprises the 4th resistance, the 5th resistance, the second optocoupler, switching circuit and fan terminal; The input anode of described second optocoupler is connected with the output collector electrode of the first optocoupler by the 4th resistance, its input cathode ground connection, and its output emitter, output collector electrode are all connected with switching circuit; Between the input anode that described 5th resistance is connected to the second optocoupler and negative pole, described fan terminal is connected with switching circuit.
3. the buffer circuit of servo-driver according to claim 2, is characterized in that: described switching circuit comprises the 6th resistance, the 7th resistance, electric capacity, triode and relay; Described one end of 6th resistance is connected with the output emitter of the second optocoupler, and the other end is connected with the base stage of triode; Described 7th resistance and electric capacity parallel with one another after be connected between the base stage of triode and ground; The collector electrode of described triode is by being connected with power supply VCC after the main coil of relay, and the grounded emitter of triode, the main contacts of described relay is connected between+12V power supply and fan terminal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201520208943.3U CN204425317U (en) | 2015-04-07 | 2015-04-07 | A kind of buffer circuit of servo-driver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201520208943.3U CN204425317U (en) | 2015-04-07 | 2015-04-07 | A kind of buffer circuit of servo-driver |
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CN204425317U true CN204425317U (en) | 2015-06-24 |
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CN201520208943.3U Expired - Fee Related CN204425317U (en) | 2015-04-07 | 2015-04-07 | A kind of buffer circuit of servo-driver |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107765598A (en) * | 2017-11-16 | 2018-03-06 | 无锡七百二十度科技有限公司 | A kind of duplicate supply energy consumption monitoring system based on Internet of Things |
CN110830026A (en) * | 2019-11-28 | 2020-02-21 | 广东美的暖通设备有限公司 | Optical coupling isolation communication circuit, circuit board and air conditioner |
-
2015
- 2015-04-07 CN CN201520208943.3U patent/CN204425317U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107765598A (en) * | 2017-11-16 | 2018-03-06 | 无锡七百二十度科技有限公司 | A kind of duplicate supply energy consumption monitoring system based on Internet of Things |
CN110830026A (en) * | 2019-11-28 | 2020-02-21 | 广东美的暖通设备有限公司 | Optical coupling isolation communication circuit, circuit board and air conditioner |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 |
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CF01 | Termination of patent right due to non-payment of annual fee |