CN220084958U - Signal synchronous measurement system for wireless charging system - Google Patents
Signal synchronous measurement system for wireless charging system Download PDFInfo
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- CN220084958U CN220084958U CN202321453275.1U CN202321453275U CN220084958U CN 220084958 U CN220084958 U CN 220084958U CN 202321453275 U CN202321453275 U CN 202321453275U CN 220084958 U CN220084958 U CN 220084958U
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- 238000005516 engineering process Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
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- 239000003990 capacitor Substances 0.000 description 1
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- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
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Abstract
The utility model relates to a signal synchronous measurement system for a wireless charging system, and belongs to the technical field of wireless charging. The purpose is to solve the problem of how to synchronize the input voltage and input current of the rectifier. The wireless charging system comprises a current measuring element, a differential amplifier module, a filtering module and a comparator, wherein the wireless charging system, a current sensor, the differential amplifier module, the filtering module and the comparator are electrically connected in sequence. The utility model firstly uses the current signal which needs to be synchronized by the current measuring element, and then outputs the square wave signal which has the same frequency and phase with the detected current after being processed by the differential amplifier module, the filter module and the comparator.
Description
Technical Field
The utility model relates to a signal synchronous measurement system, and belongs to the technical field of wireless charging.
Background
The wireless charging technology is a novel electric energy transmission technology, and the main principle is that electric energy is converted into electric energy from an external power supply by utilizing an electromagnetic induction principle, and the electric energy is transferred to a receiving end through transmission of electromagnetic waves in space. Research institutions at home and abroad conduct a great deal of research on the WPT technology in the fields of wearable intelligent equipment, medical treatment, wireless charging of electric automobiles, wireless charging of mobile phones, intelligent home and the like, so that the WPT technology is widely applied. In synchronous rectification technology, how to synchronize the rectifier input voltage and input current is one of the difficulties in wireless charging system technology.
Therefore, it is desirable to provide a signal synchronization measurement system for a wireless charging system to solve the above-mentioned technical problems.
Disclosure of Invention
The present utility model has been developed to solve the problem of how to synchronize the input voltage and input current of a rectifier, and a brief overview of the present utility model is presented below in order to provide a basic understanding of some aspects of the present utility model. It should be understood that this summary is not an exhaustive overview of the utility model. It is not intended to identify key or critical elements of the utility model or to delineate the scope of the utility model.
The technical scheme of the utility model is as follows:
a signal synchronization measurement system for a wireless charging system comprises a current measurement element, a differential amplifier module, a filtering module and a comparator, wherein the wireless charging system, a current sensor, the differential amplifier module, the filtering module and the comparator are electrically connected in sequence.
Preferably: the current measuring element is a current sensor.
Preferably: the differential amplifier module comprises a resistor R1, a resistor R2 and an amplifier, wherein the output end of the current measuring element is electrically connected with the input end of the resistor R1, the output end of the resistor R1 is electrically connected with the resistor R2 and the input end of the amplifier which are arranged in parallel, and the output end of the resistor R2 and the output end of the amplifier which are arranged in parallel are electrically connected with the input end of the filtering module.
Preferably: the amplifier adopts a DA8421 instrumentation amplifier.
Preferably: the filtering module adopts a second-order Butterworth filter.
Preferably: the filter module further comprises a resistor R7 and a resistor R8, wherein the output end of the filter module is electrically connected with the input end of the resistor R7, and the output end of the resistor R7 is electrically connected with the resistor R8 and the input end of the comparator which are arranged in parallel.
Preferably: the comparator employs a TLV3502 comparator.
The utility model has the following beneficial effects:
the utility model firstly uses the current signal which needs to be synchronized by the current measuring element, and then outputs the square wave signal which has the same frequency and phase with the detected current after being processed by the differential amplifier module, the filter module and the comparator.
Drawings
FIG. 1 is a schematic diagram of a signal/current flow for a signal synchronization measurement system for a wireless charging system;
FIG. 2 is a schematic diagram of a signal synchronization measurement system for a wireless charging system;
fig. 3 is a circuit diagram of a wireless charging system;
FIG. 4 is a circuit diagram of a differential amplifier module;
FIG. 5 is a circuit diagram of a filter module;
fig. 6 is a circuit diagram of a comparator.
In the figure: the device comprises a 1-wireless charging system, a 2-current measuring element, a 3-differential amplifier module, a 4-filtering module and a 5-comparator.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
The connection mentioned in the utility model is divided into a fixed connection and a detachable connection, wherein the fixed connection is a conventional fixed connection mode such as a non-detachable connection including but not limited to a hemmed connection, a rivet connection, an adhesive connection, a welded connection and the like, the detachable connection is a conventional detachable mode such as a threaded connection, a snap connection, a pin connection, a hinge connection and the like, and when a specific connection mode is not limited explicitly, at least one connection mode can be found in the conventional connection mode by default, so that the function can be realized, and a person skilled in the art can select the device according to needs. For example: the fixed connection is welded connection, and the detachable connection is hinged connection. Injection molding is a method of molding thermoplastics in which almost all thermoplastics can be molded, and some thermosets can be injection molded
The first embodiment is as follows: referring to fig. 1 to 6, a signal synchronization measurement system for a wireless charging system according to the present embodiment includes a current measurement element 2, a differential amplifier module 3, a filtering module 4, and a comparator 5, where the wireless charging system 1, the current sensor 2, the differential amplifier module 3, the filtering module 4, and the comparator 5 are electrically connected in sequence, and i in fig. 2 is an alternating current, i.e. a current to be measured, that needs to be synchronized in the wireless charging system 1; firstly, a current signal which needs to be synchronized by the current measuring element 2 is sequentially processed by the differential amplifier module 3, the filtering module 4 and the comparator 5, and then a square wave signal which has the same frequency and phase with the detected current is output.
The second embodiment is as follows: referring to fig. 1 to 6, a signal synchronization measurement system for a wireless charging system according to the present embodiment is described, and the current measurement element 2 is a current sensor or a current transformer, i.e., CT in fig. 2.
And a third specific embodiment: referring to fig. 1-6, a signal synchronization measurement system for a wireless charging system according to this embodiment is described, where the differential amplifier module 3 includes a resistor R1, a resistor R2, and an amplifier, the output end of the current measurement element 2 is electrically connected to the input end of the resistor R1, the output end of the resistor R1 is electrically connected to the resistor R2 and the input end of the amplifier, which are arranged in parallel, and the output ends of the resistor R2 and the amplifier are electrically connected to the input end of the filter module 4; the resistor R1 and the resistor R2 form a voltage division structure, and the differential amplifier module 3 is used for converting the differential signal into a single-ended signal to the ground.
The specific embodiment IV is as follows: the present embodiment is described with reference to fig. 1 to 6, which illustrate a signal synchronization measurement system for a wireless charging system, and the amplifier employs a DA8421 instrumentation amplifier.
Fifth embodiment: referring to fig. 1-6, a signal synchronization measurement system for a wireless charging system in this embodiment is described, resistors R3-R6, capacitors C1 and C2, and op-amp AD826 together form a filter module 4, where the filter module 4 uses a second-order butterworth filter to filter clutter in signals, and increase circuit reliability.
Specific embodiment six: referring to fig. 1-6, a signal synchronization measurement system for a wireless charging system according to this embodiment further includes a resistor R7 and a resistor R8, where the resistors R7 and R8 form a voltage dividing structure, an output end of the filtering module 4 is electrically connected to an input end of the resistor R7, and an output end of the resistor R7 is electrically connected to the resistor R8 and an input end of the comparator 5, which are arranged in parallel; for processing the alternating current signal into a square wave signal.
Seventh embodiment: the present embodiment is described with reference to fig. 1 to 6, and a signal synchronization measurement system for a wireless charging system according to the present embodiment, and the comparator 5 uses a TLV3502 comparator.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.
It should be noted that, in the above embodiments, as long as the technical solutions that are not contradictory can be arranged and combined, those skilled in the art can exhaust all the possibilities according to the mathematical knowledge of the arrangement and combination, so the present utility model does not describe the technical solutions after the arrangement and combination one by one, but should be understood that the technical solutions after the arrangement and combination have been disclosed by the present utility model.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. A signal synchronization measurement system for a wireless charging system, characterized by: the wireless charging system comprises a current measuring element (2), a differential amplifier module (3), a filtering module (4) and a comparator (5), wherein the wireless charging system (1), a current sensor (2), the differential amplifier module (3), the filtering module (4) and the comparator (5) are electrically connected in sequence.
2. A signal synchronization measurement system for a wireless charging system according to claim 1, wherein: the current measuring element (2) is a current sensor.
3. A signal synchronization measurement system for a wireless charging system according to claim 2, wherein: the differential amplifier module (3) comprises a resistor R1, a resistor R2 and an amplifier, wherein the output end of the current measuring element (2) is electrically connected with the input end of the resistor R1, the output end of the resistor R1 is electrically connected with the resistor R2 and the input end of the amplifier which are arranged in parallel, and the output end of the resistor R2 and the output end of the amplifier which are arranged in parallel are electrically connected with the input end of the filtering module (4).
4. A signal synchronization measurement system for a wireless charging system according to claim 3, wherein: the amplifier adopts a DA8421 instrumentation amplifier.
5. A signal synchronization measurement system for a wireless charging system according to claim 3, wherein: the filtering module (4) adopts a second-order Butterworth filter.
6. A signal synchronization measurement system for a wireless charging system according to claim 1 or 5, characterized in that: the filter module further comprises a resistor R7 and a resistor R8, wherein the output end of the filter module (4) is electrically connected with the input end of the resistor R7, and the output end of the resistor R7 is electrically connected with the resistor R8 and the input end of the comparator (5) which are arranged in parallel.
7. A signal synchronization measurement system for a wireless charging system according to claim 6, wherein: the comparator (5) adopts a TLV3502 comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321453275.1U CN220084958U (en) | 2023-06-08 | 2023-06-08 | Signal synchronous measurement system for wireless charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321453275.1U CN220084958U (en) | 2023-06-08 | 2023-06-08 | Signal synchronous measurement system for wireless charging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220084958U true CN220084958U (en) | 2023-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321453275.1U Active CN220084958U (en) | 2023-06-08 | 2023-06-08 | Signal synchronous measurement system for wireless charging system |
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| Country | Link |
|---|---|
| CN (1) | CN220084958U (en) |
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2023
- 2023-06-08 CN CN202321453275.1U patent/CN220084958U/en active Active
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