CN219512317U - Voltage sampling circuit, motor and robot thereof - Google Patents
Voltage sampling circuit, motor and robot thereof Download PDFInfo
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- CN219512317U CN219512317U CN202320491299.XU CN202320491299U CN219512317U CN 219512317 U CN219512317 U CN 219512317U CN 202320491299 U CN202320491299 U CN 202320491299U CN 219512317 U CN219512317 U CN 219512317U
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- optocoupler
- voltage stabilizing
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Abstract
The embodiment of the utility model belongs to the technical field of sensors, and relates to a voltage sampling circuit, which comprises: the device comprises an optocoupler, a voltage stabilizing module, a load module and an up-sampling module; the anode input pin of the optocoupler is connected with the positive electrode of the working voltage; the cathode input pin of the optocoupler is connected with the voltage stabilizing module and the load module in series and then connected with the cathode of the working voltage; the load module is used for consuming power consumption generated by the pressure difference between the working voltage and the voltage stabilizing module; the voltage stabilizing module is used for stabilizing the voltage of the input optocoupler; the collector output pin of the optocoupler is connected with the up-sampling module so as to sample the voltage output by the optocoupler through the up-sampling module. The utility model also relates to a motor/robot. The technical scheme provided by the utility model can reduce the cost of the voltage sampling circuit.
Description
Technical Field
The present utility model relates to the field of voltage sampling technologies, and in particular, to a voltage sampling circuit, a motor, and a robot thereof.
Background
In the prior art, the isolation voltage sampling is generally implemented by using an isolation chip, such as ACM1131, and a brief implementation scheme is shown in fig. 3, where VDD1 is required to supply power, and the cost of the chip is relatively high, so that the cost of a voltage sampling circuit using the chip is relatively high.
Disclosure of Invention
Based on the above, the embodiment of the utility model provides a voltage sampling circuit, a motor and a robot thereof, so as to reduce the cost of the voltage sampling circuit.
In a first aspect, an embodiment of the present utility model provides a voltage sampling circuit, which specifically includes the following technical schemes:
a voltage sampling circuit, comprising: the device comprises an optocoupler, a voltage stabilizing module, a load module and an up-sampling module;
an anode input pin of the optocoupler is connected with an anode of the working voltage;
the cathode input pin of the optocoupler is connected with the voltage stabilizing module and the load module in series in sequence and then connected with the negative electrode of the working voltage;
the load module is used for consuming power consumption generated by the pressure difference between the working voltage and the voltage stabilizing module;
the voltage stabilizing module is used for stabilizing the voltage input into the optocoupler;
and a collector output pin of the optocoupler is connected with the up-sampling module so as to sample the voltage output by the optocoupler through the up-sampling module.
Further, the voltage stabilizing module includes: the starting resistor, the voltage stabilizing chip, the fourth resistor and the fifth resistor;
the input end of the starting resistor is connected with the output end of the load module; the output end of the starting resistor is connected with the cathode of the voltage stabilizing chip and is used for providing starting current for the voltage stabilizing chip;
the cathode of the voltage stabilizing chip is connected with a cathode output pin of the optocoupler; the reference voltage pin of the voltage stabilizing chip is connected with one ends of the fifth resistor and the fourth resistor in parallel; the other end of the fifth resistor is grounded together with the anode of the voltage stabilizing chip; the other end of the fourth resistor is connected with the load module.
Further, the voltage sampling circuit further comprises a current limiting module;
and an anode input pin of the optocoupler is connected with an anode of the working voltage through the current limiting module.
Further, the current limiting module is a current limiting resistor.
Further, the voltage stabilizing chip is: TL431 or TL431B.
Further, the load module is a load resistor.
Further, the up-sampling module is an up-sampling resistor.
In a second aspect, embodiments of the present utility model provide an electric machine comprising a voltage sampling circuit as described in any one of the above.
In a third aspect, embodiments of the present utility model provide a robot comprising a motor as described above.
Compared with the prior art, the embodiment of the utility model has the following main beneficial effects:
by adopting the isolation voltage sampling circuit comprising the optocoupler, peripheral power supply and related devices are reduced, the PCB layout space is reduced, and the material cost is reduced; in addition, by adopting the voltage stabilizing module, the accuracy of voltage sampling can be improved.
Drawings
In order to more clearly illustrate the utility model or the solutions of the prior art, a brief description will be given below of the drawings used in the description of the embodiments or the prior art, it being obvious that the drawings in the description below are some embodiments of the utility model and that other drawings can be obtained from them without the inventive effort of a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of a voltage sampling circuit provided by the present utility model;
FIG. 2 is a schematic diagram of another embodiment of a voltage sampling circuit according to the present utility model;
fig. 3 is a schematic diagram of the structure of one embodiment of a prior art voltage sampling circuit.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1, fig. 1 is a schematic diagram of a voltage sampling circuit according to an embodiment of the present utility model.
An embodiment of the present utility model provides a voltage sampling circuit, the circuit 10 comprising: the device comprises an optical coupler U1, a voltage stabilizing module, a load module and an up-sampling module.
The anode input pin of the optical coupler U1 is connected with the positive electrode of the working voltage.
The cathode output pin of the optocoupler U1 is connected with the voltage stabilizing module and the load module in series and then connected with the cathode of the working voltage VDC.
And the load module is used for consuming power consumption generated by the voltage difference between the operating voltage VDC and the voltage stabilizing module.
The voltage stabilizing module is used for stabilizing the voltage of the input optocoupler U1 so as to improve the precision of voltage sampling. The voltage stabilizing module in the embodiment of the utility model can adopt various existing or future developed modules which can play a role in stabilizing voltage according to the requirement.
In one embodiment, the load module may be a load resistor R1, and other components may be used as required.
The collector output pin of the optical coupler U1 is connected with an up-sampling module, and the voltage output by the collector output pin of the optical coupler U1 is sampled through the up-sampling module.
The emitter output pin of the optical coupler U1 is grounded.
In one embodiment, the anode of optocoupler U1 inputs current I F The value of (2) is limited to be within 1-10 mA, thereby ensuring I F Collector output current I of optocoupler U1 C The linear relation is kept better, and I can be obtained F And I C The corresponding relation (1) of (2) is as follows:
wherein X is a constant;
the following relation (2) can be obtained based on the circuit to realize the isolation detection of the bus voltage:
wherein V is F The value of (2) can be given by the chip manual of optocoupler U1; v (V) U2 Is the output voltage of the voltage stabilizing module.
Therefore, based on the up-sampling voltage VDD, a specific value of the operating voltage VDC can be obtained.
By adopting the isolation voltage sampling circuit comprising the optocoupler, peripheral power supply and related devices are reduced, the PCB layout space is reduced, and the material cost is reduced; in addition, by adopting the voltage stabilizing module, the accuracy of voltage sampling can be improved.
Fig. 2 is a schematic diagram of a voltage sampling circuit according to another embodiment of the present utility model.
In one embodiment, a voltage stabilizing module includes: the starting resistor R3, the voltage stabilizing chip U2, the fourth resistor R4 and the fifth resistor R5.
The input end of the starting resistor R3 is connected with the output end of the load resistor R1; the output end of the starting resistor R3 is connected with the cathode of the voltage stabilizing chip U2 and is used for providing starting current for the voltage stabilizing chip U2.
In general, the chip manual of the voltage stabilizing chip U2 specifies the minimum current for the normal operation of the voltage stabilizing chip, and the starting resistor R3 is connected across the output end of the load resistor R1 and the two ends of the voltage stabilizing chip U2, so as to ensure that the working current of the voltage stabilizing chip U2 can meet the working requirement.
Specifically, the voltage stabilizing chip may be a chip which has been developed in the present or future and can perform a voltage stabilizing function. In a preferred embodiment, the voltage regulator chip is: TL431 and TL431B may be better adapted to the voltage sampling circuit according to the embodiment of the present utility model to provide a stable voltage for the optocoupler U1.
The cathode of the voltage stabilizing chip U2 is connected with the cathode output pin of the optocoupler U1, and the reference voltage pin of the voltage stabilizing chip U2 is connected with one ends of the fifth resistor R5 and the fourth resistor R4 in parallel; the other end of the fifth resistor R5 is grounded together with the anode of the voltage stabilizing chip, and the other end of the fourth resistor R4 is connected with the load resistor R1.
In one embodiment, based on equation (3), the output voltage at the location of the voltage regulator chip U2, i.e., the output voltage v of the voltage regulator module, can be determined U2 ：
Wherein 2.5 is the reference voltage of the corresponding pin of the voltage stabilizing chip U2 chip, which is given by the voltage stabilizing chip manual and preset by manufacturers.
By adopting the voltage stabilizing module, the embodiment of the utility model can meet the required voltage stabilizing function by using fewer devices, and further reduces the cost of the sampling circuit; in addition, because the output stabilized voltage is confirmed according to the resistance values of R4 and R5, different voltage values can be obtained by adjusting the resistance values, and therefore, an adjustable stabilized voltage can be provided, and the circuit can adapt to different bus voltages; in addition, the differential pressure between two ends of the first current limiting resistor is reduced, and the loss on the resistor is reduced; meanwhile, the voltage stabilizing module can provide high-precision voltage, and is beneficial to improving the measurement precision of a circuit.
As further shown in fig. 1 and 2, in one embodiment, the circuit further includes a protection module for protecting the circuit.
Further, in one embodiment, the protection module includes a first current limiting resistor R2.
The anode input pin of the optical coupler U1 is connected with the positive electrode of the working voltage through a first current limiting resistor R2 in series, so that the anode of the optical coupler U1 is subjected to current limiting protection through the first current limiting resistor R2.
In one embodiment, the upsampling module may be a resistor R6. The collector output pin of the optical coupler U1 is connected with a pull-up resistor R6, and the voltage output by the collector output pin of the optical coupler U1 is sampled through the pull-up resistor.
Based on the voltage sampling circuit described in the above embodiment, the embodiment of the utility model further provides a motor.
The motor includes the voltage sampling circuit described in the above embodiments, by which the voltage of the low-voltage direct-current power supply and the like are detected.
By adopting the isolation sampling circuit, the embodiment of the utility model reduces peripheral power supply and related devices, reduces the layout space of a PCB and reduces the material cost, thereby reducing the volume of the motor and the processing cost of the motor.
Based on the motor described in the above embodiment, the embodiment of the present utility model further provides a robot, which includes a plurality of joint modules, each joint module including the motor described in the above embodiment.
Such robots include, but are not limited to: humanoid robots, manipulators, medical/rehabilitation/care robots, unmanned equipment.
By adopting the isolation sampling circuit, peripheral power supply and related devices are reduced, the layout space of a PCB is reduced, and the material cost is reduced, so that the motor volume is reduced, the motor processing cost is reduced, the robot volume is further reduced, and the robot processing cost is reduced.
It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.
Claims (9)
1. A voltage sampling circuit, comprising: the device comprises an optocoupler, a voltage stabilizing module, a load module and an up-sampling module;
an anode input pin of the optocoupler is connected with an anode of the working voltage;
the cathode input pin of the optocoupler is connected with the voltage stabilizing module and the load module in series in sequence and then connected with the negative electrode of the working voltage;
the load module is used for consuming power consumption generated by the pressure difference between the working voltage and the voltage stabilizing module;
the voltage stabilizing module is used for stabilizing the voltage input into the optocoupler;
and a collector output pin of the optocoupler is connected with the up-sampling module so as to sample the voltage output by the optocoupler through the up-sampling module.
2. The voltage sampling circuit of claim 1, wherein the voltage regulation module comprises: the starting resistor, the voltage stabilizing chip, the fourth resistor and the fifth resistor;
the input end of the starting resistor is connected with the output end of the load module; the output end of the starting resistor is connected with the cathode of the voltage stabilizing chip and is used for providing starting current for the voltage stabilizing chip;
the cathode of the voltage stabilizing chip is connected with a cathode output pin of the optocoupler; the reference voltage pin of the voltage stabilizing chip is connected with one ends of the fifth resistor and the fourth resistor in parallel; the other end of the fifth resistor is grounded together with the anode of the voltage stabilizing chip; the other end of the fourth resistor is connected with the load module.
3. The voltage sampling circuit of claim 1 or 2, further comprising a current limiting module;
and an anode input pin of the optocoupler is connected with an anode of the working voltage through the current limiting module.
4. A voltage sampling circuit according to claim 3, wherein the current limiting module is a current limiting resistor.
5. The voltage sampling circuit of claim 2, wherein the voltage stabilizing chip is: TL431 or TL431B.
6. A voltage sampling circuit according to claim 1 or 2, wherein the load module is a load resistor.
7. The voltage sampling circuit of claim 6, wherein the up-sampling module is an up-sampling resistor.
8. An electric machine, characterized in that it comprises a voltage sampling circuit according to any one of claims 1 to 7.
9. A robot comprising the motor of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320491299.XU CN219512317U (en) | 2023-03-15 | 2023-03-15 | Voltage sampling circuit, motor and robot thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320491299.XU CN219512317U (en) | 2023-03-15 | 2023-03-15 | Voltage sampling circuit, motor and robot thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219512317U true CN219512317U (en) | 2023-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320491299.XU Active CN219512317U (en) | 2023-03-15 | 2023-03-15 | Voltage sampling circuit, motor and robot thereof |
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| Country | Link |
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| CN (1) | CN219512317U (en) |
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- 2023-03-15 CN CN202320491299.XU patent/CN219512317U/en active Active
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