CN210807056U - Detection circuit suitable for converter analog input - Google Patents
Detection circuit suitable for converter analog input Download PDFInfo
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- CN210807056U CN210807056U CN201922160204.2U CN201922160204U CN210807056U CN 210807056 U CN210807056 U CN 210807056U CN 201922160204 U CN201922160204 U CN 201922160204U CN 210807056 U CN210807056 U CN 210807056U
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Abstract
The utility model discloses a detection circuitry suitable for converter analog input, including resistance R612, triode Q53, field effect transistor M5 and chip U52, resistance R612 one end is the free end, triode Q53 base is connected to the resistance R612 other end, triode Q53 projecting pole ground connection, triode Q53 collecting electrode is connecting resistance R613 and resistance R610 respectively, power V1 is connected to the resistance R613 other end, ground resistance R614 and field effect transistor M5 'S G utmost point is connected respectively to the resistance R610 other end, field effect transistor M5' S S utmost point is connecting resistance R486 and electric capacity C16 and ground connection respectively. The utility model discloses a several free ends can be connected to the corresponding interface of converter, and the procedure that uses the converter selects to use voltage input or electricity input, saves loaded down with trivial details wire jumper and pulls out and inserts, will the utility model discloses integrated to on the corresponding converter driver, promoted the flexibility suitability of product, improved the competitiveness of product.
Description
Technical Field
The utility model relates to an analog circuit specifically is a detection circuitry suitable for converter analog quantity input.
Background
A Variable-frequency Drive (VFD) is a power control device that applies frequency conversion technology and microelectronic technology to control an ac motor by changing the frequency of a working power supply of the motor.
The frequency converter mainly comprises a rectifying unit (alternating current to direct current), a filtering unit, an inverting unit (direct current to alternating current), a braking unit, a driving unit, a detection unit micro-processing unit and the like. The frequency converter adjusts the voltage and frequency of an output power supply by switching on and off an internal IGBT, provides the required power supply voltage according to the actual requirement of the motor, and further achieves the purposes of energy saving and speed regulation. With the continuous improvement of the industrial automation degree, the frequency converter is also widely applied.
However, in the current frequency converter industry, analog quantity input has long been, a jumper (short-circuit ring) is required to be used for selecting voltage input and current input, and the problems of inconvenience, easiness in insertion error, complexity in after-sale service and the like exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a detection circuitry suitable for converter analog input to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a detection circuit suitable for analog input of a frequency converter comprises a resistor R612, a triode Q53, a field effect transistor M5 and a chip U52, wherein one end of the resistor R612 is a free end, the other end of the resistor R612 is connected with the base electrode of a triode Q53, the emitter electrode of the triode Q53 is grounded, the collector electrode of a triode Q53 is respectively connected with a resistor R613 and a resistor R610, the other end of the resistor R613 is connected with a power supply V1, the other end of the resistor R610 is respectively connected with a ground resistor R614 and the G electrode of the field effect transistor M5, the S electrode of a field effect transistor M5 is respectively connected with a resistor R486 and a capacitor C16 and is grounded, the D electrode of a field effect transistor M5 is respectively connected with the other end of a resistor R486, the other end of a capacitor C25, a resistor R475 and a resistor R73474, the other end of the resistor R474 is respectively connected with a resistor R480 and a port XAI1, the other end of the resistor R480 is respectively connected with a ground, The chip U52 pin 1 and the resistor R478, the resistor R478 is connected with the resistor R481 at the other end, the resistor R481 is connected with the resistor R487, the capacitor C355 and the chip U52 pin 5 at the other end respectively, the capacitor C355 is connected with the other end of the resistor R487 and grounded, the chip U52 pin is connected with the pin 7 and the resistor R482 of the chip U52 pin respectively, the diode A cathode, the capacitor C353 and the port AI1 are connected with the other end of the resistor R482 respectively, the diode A anode is connected with the other end of the capacitor C353 and grounded, and the chip U52 signal is LF353 DR.
As a further preferred embodiment of the present invention, the transistor Q53 is an NPN transistor.
As a still further preferred embodiment of the present invention, the fet model is IRFR014 TRPBF.
As a still further preferable aspect of the present invention, the voltage of the power source V1 is 15V.
As a still further preferred aspect of the present invention, the port XAI1 is an analog input port.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a several free ends can be connected to the corresponding interface of converter, and the procedure that uses the converter selects to use voltage input or electricity input, saves loaded down with trivial details wire jumper and pulls out and inserts, will the utility model discloses integrated to on the corresponding converter driver, promoted the flexibility suitability of product, improved the competitiveness of product.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a detection circuit suitable for analog input of a frequency converter includes a resistor R612, a transistor Q53, a fet M5, and a chip U52, one end of the resistor R612 is a free end, the other end of the resistor R612 is connected to a base of the transistor Q53, an emitter of the transistor Q53 is grounded, a collector of the transistor Q53 is connected to a resistor R613 and a resistor R610, the other end of the resistor R613 is connected to a power supply V1, the other end of the resistor R610 is connected to a ground resistor R614 and a G pole of the fet M5, an S pole of the fet 539m 473 is connected to a resistor R486 and a capacitor C16 and grounded, a D pole of the fet M5 is connected to the other end of a resistor R486, the other end of the capacitor C16, a resistor R475 and a resistor R474, the other end of the resistor R474 is connected to a resistor R480 and an XAI1, the other end of the resistor R480 is connected to a ground capacitor C356, the other end of the capacitor C347 is respectively connected with the other end of a resistor R473, a pin 1 of a chip U52 and a resistor R478, the other end of the resistor R478 is connected with a resistor R481, the other end of the resistor R481 is respectively connected with a resistor R487, a capacitor C355 and a pin 5 of the chip U52, the other end of the resistor R487 is connected with the capacitor C355 and grounded, a pin 7 of a chip U52 is respectively connected with a pin 7 of the chip U52 and a resistor R482, the other end of the resistor R482 is respectively connected with a negative electrode of a diode A, a capacitor C353 and a port AI1, an anode of the diode A is connected with the other end of the; the triode Q53 is an NPN type triode; the model of the field effect transistor is IRFR014 TRPBF; the voltage of the power supply V1 is 15V; the port XAI1 is an analog input port.
Referring to fig. 1, the circuit realizes that 0-10V of the XAI1 signal is inputted with analog voltage or 0-20mA of analog current, and outputs 0-3V at the AI1 port to the AD port of the DSP controller; an electronic circuit selection switch composed of R612, Q53, R613, R610, R614, M5 and R485 is used for selecting a switch, an AI _1 signal is sent to a DS controller P, when AI _1 is in a high level, Q53 is conducted through R612, Q53 is conducted, a gate level of M5 is pulled to 0 level through R610, M5 is not conducted, the input impedance of an XAI1 signal at the moment is 100.5K omega, the input signal is a voltage signal of 0-10V, the voltage is divided by U52A through a first stage, then the voltage is passed through R478, R481 and R487, then the voltage is passed through U52B through a second stage, then the voltage is passed through RC filtering and diode clamping protection, and then 0-3V is obtained and enters an AD port of the DSP controller; when AI _1 is at low level, Q53 is not conducted through R612, Q53 is not conducted, the gate level of M5 is turned on through R613, R610, R614, M5 is conducted, the input impedance of the XAI1 signal is 500 Ω at this time, the input signal is a voltage signal of 0-20mA, the voltage applied to the 500 Ω resistor is 0-10V, the voltage is divided by the first stage following U52A, the R478, R481, R487, the second stage following U52B, the RC filtering and the diode clamp protection are performed, and 0-3V is obtained and enters the AD port of the DSP controller.
To sum up, the utility model discloses a several free ends can be connected to the corresponding interface of converter, and the procedure that uses the converter selects to use voltage input or electric input, saves loaded down with trivial details wire jumper and pulls out and insert, will the utility model discloses integrated to on the corresponding converter driver, promoted the flexibility suitability of product, improved the competitiveness of product.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A detection circuit suitable for analog quantity input of a frequency converter is characterized by comprising a resistor R612, a triode Q53, a field-effect tube M5 and a chip U52, wherein one end of the resistor R612 is a free end, the other end of the resistor R612 is connected with the base electrode of a triode Q53, the emitter electrode of the triode Q53 is grounded, the collector electrode of the triode Q53 is respectively connected with a resistor R613 and a resistor R610, the other end of the resistor R613 is connected with a power supply V1, the other end of the resistor R610 is respectively connected with a ground resistor R614 and the G electrode of the field-effect tube M5, the S electrode of the field-effect tube M5 is respectively connected with a resistor R486 and a capacitor C16 and is grounded, the D electrode of the field-effect tube M5 is respectively connected with the other end of a resistor R486, the other end of a capacitor C16, the resistor R475 and the resistor R474, the other end of the resistor R474 is respectively connected with a resistor R480 and a port XAI1, the other end of the resistor R480 is respectively connected, The chip U52 pin 1 and the resistor R478, the resistor R478 is connected with the resistor R481 at the other end, the resistor R481 is connected with the resistor R487, the capacitor C355 and the chip U52 pin 5 at the other end respectively, the capacitor C355 is connected with the other end of the resistor R487 and grounded, the chip U52 pin is connected with the pin 7 and the resistor R482 of the chip U52 pin respectively, the diode A cathode, the capacitor C353 and the port AI1 are connected with the other end of the resistor R482 respectively, the diode A anode is connected with the other end of the capacitor C353 and grounded, and the chip U52 signal is LF353 DR.
2. The circuit of claim 1, wherein the transistor Q53 is an NPN transistor.
3. The detection circuit suitable for the analog input of the frequency converter as claimed in claim 2, wherein the fet is of type IRFR014 TRPBF.
4. The detection circuit for the analog input of the frequency converter as recited in claim 3, wherein the voltage of the power supply V1 is 15V.
5. The detection circuit suitable for the analog quantity input of the frequency converter according to claim 4, wherein the port XAI1 is an analog quantity input port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922160204.2U CN210807056U (en) | 2019-12-05 | 2019-12-05 | Detection circuit suitable for converter analog input |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922160204.2U CN210807056U (en) | 2019-12-05 | 2019-12-05 | Detection circuit suitable for converter analog input |
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| CN210807056U true CN210807056U (en) | 2020-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116243095A (en) * | 2023-05-10 | 2023-06-09 | 深圳弘远电气有限公司 | Automatic program control-based test circuit, test device and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116243095A (en) * | 2023-05-10 | 2023-06-09 | 深圳弘远电气有限公司 | Automatic program control-based test circuit, test device and control method thereof |
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