CN209992570U - Electric energy measuring device - Google Patents
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- CN209992570U CN209992570U CN201920433468.8U CN201920433468U CN209992570U CN 209992570 U CN209992570 U CN 209992570U CN 201920433468 U CN201920433468 U CN 201920433468U CN 209992570 U CN209992570 U CN 209992570U
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Abstract
Embodiments of the present disclosure provide an electrical energy measurement device (110). The electric energy measuring device (110) comprises: a current sampling module (314) connected to the sensing coil (312) and configured to generate a current analog signal based on the AC current of the circuit under test (310) sensed by the sensing coil (312); a voltage sampling module (316) configured to generate a voltage analog signal by collecting an AC voltage from a circuit under test (310); a controller (318) configured to generate power measurement data for a circuit under test (310) based on the voltage analog signal and the current analog signal; and a communication module (320) connected to the controller (318) and configured to communicate the power measurement data to an external device, wherein the controller (318) and the communication module (320) are integrated on the same integrated circuit chip (330). According to the embodiment of the disclosure, the electric energy measuring device which is small in size, low in power consumption and convenient to install is realized.
Description
Technical Field
Embodiments of the present disclosure relate to an electric energy measuring device, and more particularly, to an electric energy measuring device that is small in size, low in power consumption, and easy to install.
Background
Conventional power measuring devices still have design space to further reduce the volume and power consumption. For example, in a conventional electric energy measuring apparatus, a controller or a control module to implement an electric energy measuring function and a communication module to implement a communication function are provided. The controller and the communication module are typically separately provided on different integrated circuit chips, and the separate provision of the controller and the communication module would occupy significant space on the circuit board and have higher power consumption when configuring the power measuring device. For another example, a power supply module for supplying an operating voltage to each component of the power measuring device is also provided in the conventional power measuring device. The above-mentioned higher power consumption requirements of the controller and the communication module pose significant challenges for miniaturization and simplification of the design of the power supply module. As another example, a built-in transformer is typically integrated into a conventional household electrical energy measuring device. In addition, some conventional electric energy measuring devices are also provided with a complicated isolation circuit. Each of the above-mentioned cases constitutes a significant part of the volume and power consumption of conventional power measuring devices.
Therefore, there is still a need for an electric energy measuring device that is small in size, low in power consumption, convenient in wiring, flexible in installation, and wide in application range.
SUMMERY OF THE UTILITY MODEL
Embodiments of the present disclosure provide an improved electrical energy measurement device to solve or at least alleviate problems existing in conventional electrical energy measurement devices.
An embodiment of the present disclosure provides an electric energy measurement apparatus, including: a current sampling module connected to the sensing coil and configured to generate a current analog signal based on an AC current of the circuit under test sensed by the sensing coil; a voltage sampling module configured to generate a voltage analog signal by collecting an AC voltage from a circuit-under-test; a controller configured to generate power measurement data regarding a circuit under test based on the voltage analog signal and the current analog signal; and a communication module connected to the controller and configured to transmit the power measurement data to an external device, wherein the controller and the communication module are integrated on the same integrated circuit chip.
In some embodiments, the electrical energy measurement device further comprises: a power module configured to convert the AC voltage to a first DC voltage and provide the first DC voltage to the current sampling module, the voltage sampling module, the controller, and the communication module.
In some embodiments, the power module comprises: an input filter and rectification circuit configured to convert the AC voltage into a second DC voltage; a high voltage linear voltage reduction circuit connected to the input filter rectification circuit and configured to convert the second DC voltage into a third DC voltage; a high voltage buck converter connected to the high voltage linear buck circuit and configured to convert the third DC voltage to a fourth DC voltage; and a low dropout regulator connected to the high voltage buck converter and configured to convert the fourth DC voltage to the first DC voltage.
In some embodiments, the electrical energy measurement device further comprises: an analog-to-digital conversion module connected to the current sampling module, the voltage sampling module, and the controller and configured to convert the voltage analog signal and the current analog signal to a voltage digital signal and a current digital signal, respectively, and provide the voltage digital signal and the current digital signal to the controller, wherein the controller is further configured to generate the electrical energy measurement data based on the voltage digital signal and the current digital signal.
In some embodiments, the electrical energy measurement device further comprises: an indicator light connected to the controller and configured to indicate a communication status.
In some embodiments, the current sampling module, the voltage sampling module, the controller, and the communication module are integrated on the same circuit board.
According to the embodiment of the disclosure, the electric energy measuring device which is small in size, low in power consumption and convenient to install is realized.
The summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. The summary is not intended to identify key features or essential features of the disclosure, nor is it intended to limit the scope of the disclosure.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
FIG. 1 illustrates a schematic diagram of an example environment in which embodiments of the present disclosure may be implemented;
FIG. 2 illustrates a schematic diagram of another example environment in which embodiments of the present disclosure may be implemented;
FIG. 3 shows a block diagram of an electrical energy measurement device according to an embodiment of the present disclosure; and
fig. 4 illustrates an example block diagram of a power module in the power measurement device of this disclosure.
Detailed Description
The principles of the present disclosure will be described below with reference to a number of example embodiments shown in the drawings. While the preferred embodiments of the present disclosure have been illustrated in the accompanying drawings, it is to be understood that these embodiments are described merely for the purpose of enabling those skilled in the art to better understand and to practice the present disclosure, and are not intended to limit the scope of the present disclosure in any way.
The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.
Embodiments of the present disclosure provide an improved electrical energy measurement device. The electric energy measuring device has the advantages of small volume, convenient wiring, flexible installation, wide application range and the like, and is convenient to be integrated into an electric energy monitoring and measuring system due to the communication function, particularly the wireless communication function. The electric energy measuring device can be applied to a newly-built low-voltage power distribution system to save space, and can also be applied to the transformation of the existing low-voltage power distribution system.
FIG. 1 illustrates a schematic diagram of an example environment 100 in which embodiments of the present disclosure may be implemented. Environment 100 includes power measurement device 110, gateway 120, router 130, storage device 140, and user equipment 150.
The power measurement device 110 senses current and voltage signals from the circuit under test and generates power measurement data based on the current and voltage signals. The power measurement data generated by the power measurement device 110 may be transmitted to an external device for further processing in a wired and/or wireless manner. The specific composition of the power measuring device 110 will be further described below with reference to fig. 3 and 4.
In fig. 1, the gateway 120 is configured to receive power measurement data from the power measurement devices 110 and to protocol convert and configure the received power measurement data for subsequent transmission over the network. In some embodiments, the gateway 120 may be embedded with a gateway server in addition to conventional protocol conversion functions to facilitate the user to directly obtain power measurement data, set parameters, and manage reports.
The protocol converted power measurement data is routed and forwarded through router 130 in the network, for example to storage device 140 in the network.
In some embodiments, the storage device 140 may be used to store electrical energy measurement data from different residential quarters, commercial users, power plants, or other plants. In some embodiments, storage 140 may include, but is not limited to, a form of physical storage or a data center.
In fig. 1, a user may log into his or her power query account at user device 150 and view and analyze power measurement data from storage 140. Although in fig. 1 the user device 150 is shown as a mobile phone, it should be understood that the user device 150 may include, but is not limited to, mobile phones, desktop computers, laptop computers, tablet computers, smart watches, and other forms of human-computer interaction terminals. In some embodiments, analyzing the power measurement data by the user includes querying historical power usage trends, obtaining power usage trend prediction curves, downloading power usage advice reports, and the like.
By configuring the environment 100 of fig. 1, flexible configuration and installation of the power measurement apparatus 110 for various field applications, large-scale storage of power measurement data, and ready access to power measurement data by a user are achieved.
FIG. 2 illustrates a schematic diagram of another example environment 200 in which embodiments of the present disclosure may be implemented. The environment 200 in fig. 2 is different from the environment 100 in fig. 1 in that power measurement data from the power measurement device 110 is transmitted to a Building Management System (BMS) 210 through a network after being subjected to protocol conversion and configuration by the gateway 120.
The BMS refers to a system integrated in a building or a building complex for integrated control and management based on a plurality of collection terminals from the building. In some embodiments, the collection terminal includes equipment to collect various signals including, but not limited to, a power meter, a power measurement device, a temperature sensor, a smoke sensor, a photoelectric sensor, a PM2.5 sensor, a PM10 sensor, and a switch state controller. In some embodiments, the collection data from multiple collection terminals is transmitted to a building server for use in converting the different communication protocols to the communication protocol employed by the BMS bus. In some embodiments, all of the collected data is transmitted to the main server and the network workstations of the BMS system on the BMS bus for comprehensive analysis, control, and management.
In the embodiment of fig. 2, the BMS 210 analyzes the power measurement data from the power measurement devices 110 for overall control of the building in which the BMS 210 is located. The plurality of power measuring devices 110 collect, for example, power consumption of each electrical appliance and electrical equipment in the building for the BMS 210 to perform integrated energy saving management of the building or building complex. By the configuration of environment 200 in fig. 2, efficient support is provided for flexible control of building management systems.
Although only two example environments 100 and 200 of the power measurement device 110 are illustrated by fig. 1 and 2, it should be understood that the power measurement device 110 may be applied in a variety of applicable environments.
The specific composition of the electric energy measuring device 110 will be described below with reference to fig. 3. Fig. 3 shows a block diagram of the electrical energy measurement device 110 according to an embodiment of the present disclosure. In addition to the power measurement device 110, a circuit under test 310 is shown in FIG. 3.
As described above, in the conventional electric energy measuring apparatus, the controller (or control module) that realizes the electric energy measuring function and the communication module that realizes the communication function are respectively provided on two separate integrated circuit chips. This arrangement is disadvantageous for miniaturization of the electric energy measuring apparatus. To address this issue, the power measurement device 110 of the present disclosure integrates the controller 318 and the communication module 320 on the same integrated circuit chip 330, as shown in fig. 3. By integrating the controller 318 and the communication module 320 on the same integrated circuit chip 330, one integrated circuit chip can implement the functions of both the controller 318 and the communication module 320, which helps to reduce the overall power consumption of the controller 318 and the communication module 320 compared to a case where the controller 318 and the communication module 320 are separately provided. Thus, a low power consumption design of the controller 318 and the communication module 320 is achieved. This allows the total power consumption of the power measuring apparatus 110 to be further reduced, allowing a simplified design of the power measuring apparatus 110, particularly of the power supply module 322 to be described later, to further promote miniaturization of the power measuring apparatus 110.
The electrical energy measurement device 110 includes a sensing coil 312, the sensing coil 312 configured to sense an AC current of the circuit 310 under test. The number of sensing coils 312 is, for example, three, with one sensing coil 312 nested per phase, as shown in fig. 3, for measuring three-phase AC current.
In some embodiments, sensing coil 312 comprises a rogowski coil, also known as a rogowski coil (rogowski coil). Alternatively, sensing coil 312 comprises a hall coil, superconducting coil, or other coil suitable for sensing AC current. In some embodiments, sensing coil 312 comprises a detachable rogowski coil to facilitate flexible sleeving over the circuit 312 under test.
In some embodiments, sensing coil 312 is disposed outside of the housing of power measurement device 110, other components of power measurement device 110 are disposed inside of the housing of power measurement device 110, and sensing coil 312 is in a rope connection with the housing to further increase installation flexibility and reduce installation volume of power measurement device 110.
The electrical energy measurement device 110 also includes a current sampling module 314, the current sampling module 314 being connected to the sensing coil 312 and configured to generate a current analog signal based on the AC current of the circuit under test 310 sensed by the sensing coil 312. In some embodiments, the current sampling module 314 includes a cascade of protection circuits and low pass filter circuits, in which case the current analog signal is a low pass filtered signal of the AC current sensed by the sensing coil 312.
In some embodiments, the output of the current sampling module 314 is connected to an input of a controller 318, which will be described below. In some embodiments, the output of the current sampling module 314 is connected to an input of an analog-to-digital conversion module 324, which will be described below, the output of the analog-to-digital conversion module 324 being further connected to an input of the controller 318, as shown in fig. 3.
The power measurement device 110 also includes a voltage sampling module 316, the voltage sampling module 316 configured to generate a voltage analog signal by collecting the AC voltage from the circuit under test 310. In some embodiments, the voltage sampling module 316 includes a voltage divider circuit and a low pass filter circuit in cascade to step down the AC voltage to a voltage analog signal suitable for processing by the power measurement device 110.
In some embodiments, the input of the voltage sampling module 316 is directly connected to the output of a line breaker (not shown in fig. 3 for simplicity reasons) of the circuit under test 310 to collect the AC voltage from the circuit under test 310. In some embodiments, an input of the voltage sampling module 316 is connected to an output of a line breaker of the circuit under test 310 via an additional input connector (also not shown in fig. 3) to collect an AC voltage from the circuit under test 310.
In some embodiments, the number of terminals at the input of the voltage sampling module 316 is four to accommodate the power measurement requirements of the three-phase, four-wire standby circuit.
In some embodiments, the output of the voltage sampling module 316 is connected to an input of a controller 318, which will be described below. In some embodiments, an output of the voltage sampling module 316 is connected to an input of an analog-to-digital conversion module 324, which will be described below, and an output of the analog-to-digital conversion module 324 is further connected to an input of the controller 318, as shown in fig. 3.
The power measurement device 110 also includes a controller 318, the controller 318 configured to generate power measurement data for the circuit under test 310 based on the voltage analog signal and the current analog signal. In some embodiments, the controller 318 includes a Micro Control Unit (MCU) or other microcontroller. In some embodiments, controller 318 includes a Micro Control Unit (MCU) portion or other microcontroller portion in an integrated circuit chip.
In some embodiments, the controller 318 generates the electrical energy measurement data based directly on the voltage analog signal and the current analog signal. In this case, the controller 318 is connected to the current sampling module 314 and the voltage sampling module 316. In some embodiments, the controller 318 generates the electrical energy measurement data based on the analog-to-digital converted voltage and voltage analog signals and current analog signals, in other words, the controller 318 generates the electrical energy measurement data based on the voltage and current digital signals. In this case, the controller 318 is connected to the current sampling module 314 and the voltage sampling module 316 via an analog-to-digital conversion module 324.
In some embodiments, the electrical energy measurement data may include at least one of: current, voltage, active power, reactive power, apparent power, active power, reactive power, and power factor.
The power measurement apparatus 110 also includes a communication module 320, the communication module 320 being connected to the controller 318 and configured to transmit power measurement data to an external device. The external device is, for example, the gateway 120 shown in fig. 1 and 2. In some embodiments, the communication module 320 includes a chip for integrating communication configuration functions and peripheral circuits.
In the embodiment where the power measuring device 110 wirelessly communicates with an external device, the wireless communication may adopt various wireless communication technologies such as bluetooth, WiFi, ZigBee, and the like, as needed. For example, ZigBee is a short-range wireless communication technology with low power consumption, low cost, low transmission rate, and simple architecture based on IEEE 802.15.4, and has been widely used in the field of automatic control in recent years.
In embodiments where the power measurement apparatus 110 communicates wirelessly with an external device, the communication module 320 also includes an antenna that wirelessly transmits power measurement data to the external device. In an embodiment where the power measurement device 110 employs ZigBee technology for wireless communication, the communication module further includes a ZigBee antenna for wirelessly transmitting power measurement data to an external device.
In some embodiments, the controller 318 and the communication module 320 are integrated on the same integrated circuit chip 330, thereby further simplifying the wiring of the integrated circuit chip 330 and thereby enabling further miniaturization of the electrical energy measurement device 110. In this example embodiment, integrated circuit chip 330 may implement primarily two functions: (i) generating power measurement data for the circuit under test 310 based on the voltage analog signal and the current analog signal; and (ii) performing a communication configuration that communicates the power measurement data to an external device. Further, in the case where the embodiment employs wireless communication, the integrated circuit chip 330 further includes peripheral circuits for wireless communication and an antenna integrated thereon. The peripheral circuits may include matching network elements, power supply filtering elements, oscillation filters, and the like. In other variations of this embodiment, integrated circuit chip 330 may also implement other functions.
In some embodiments, the power measurement device 110 further includes a power module 322, the power module 322 configured to convert the AC voltage to a first DC voltage and provide the first DC voltage to the current sampling module 314, the voltage sampling module 316, the controller 318, and the communication module 320. The power supply module 322 is a module for supplying operating power to each component in the power measuring device 110, as indicated by a dotted line in fig. 3.
In some embodiments, the power module 322 includes a plurality of circuits connected to step down a wide range of AC voltages from the circuit under test 310 to a first DC voltage suitable for operation of the components in the power measurement device 110.
In some embodiments, the AC voltage from the output of the line breaker of the circuit under test 310 is input to the power module 322 via the additional input connector described above.
As described above, the integrated circuit chip integration of the controller 318 and the communication module 320 and the low power consumption design employed enable a simplified design of the power supply module 322. Embodiments of the present disclosure achieve a reduction in the size of the power supply module 322 by simplifying the design of the power supply module 322, and thereby further contribute to miniaturization of the power measurement device 110. This will be further explained with reference to fig. 4 later.
In some embodiments, the power measurement device 110 further includes an analog-to-digital conversion module 324, the analog-to-digital conversion module 324 being connected to the current sampling module 314, the voltage sampling module 316, and the controller 318, and configured to convert the voltage analog signal and the current analog signal to a voltage digital signal and a current digital signal, respectively, and provide the voltage digital signal and the current digital signal to the controller 318. In this case, the controller 318 is further configured to generate the electrical energy measurement data based on the voltage digital signal and the current digital signal.
In some embodiments, the analog-to-digital conversion module 324 includes analog-to-digital conversion circuitry and amplification circuitry for analog-to-digital converting and necessary amplifying the voltage analog signal and the current analog signal. In some embodiments, the analog-to-digital conversion module 324 includes phase compensation circuitry.
In some embodiments, the electrical energy measurement device 110 further includes an indicator light 326, the indicator light 326 being connected to the controller 318 and configured to indicate a communication status. In some embodiments, indicator light 326 may indicate different communication states by displaying different colors and/or blinking states. In some embodiments, indicator light 326 may comprise an LED light.
In some embodiments, the communication state may include a communication normal state, a search gateway state, a connection lost state, and a failure state.
In some embodiments, the indicator light 326 is mounted on an exterior surface of the housing of the electrical energy measurement device 110.
In some embodiments, the current sampling module 314, the voltage sampling module 316, the controller 318, and the communication module 320 are integrated on the same circuit board (not shown in fig. 3). In some embodiments, the current sampling module 314, the voltage sampling module 316, the controller 318, the communication module 320, the power module 322, and the analog-to-digital conversion module 324 are integrated on the same circuit board (not shown in fig. 3).
In some embodiments, the power measurement device 110 also includes a button on the housing that is connected to the controller 318 for controlling the state of the controller 318.
In some embodiments, the power measurement device 110 further includes a rail snap for mounting the power measurement device 110 to a DIN rail.
In some embodiments, the AC current sensed by sensing coil 312 is in the range of 1A to 1000A.
In some embodiments, the antenna of the communication module 320 includes copper wires disposed on a circuit board.
In some embodiments, the insulation requirements of the power measuring device 110 are achieved by designing a safe distance between the circuit board and the housing and applying an insulating paint.
In some embodiments, the power measurement device 110 may also include a display to display power measurement data. In some embodiments, the display may also display the operating status of components in the power measurement device 110. In some embodiments, the display may also display fault information and alarm information of the power measuring device 110 according to the operating status of components in the power measuring device 110.
It is to be noted that although the circuit under test 310 is illustrated as a three-phase four-wire system circuit in fig. 3, the circuit under test 310 may have other various forms such as a single-phase two-wire system circuit, a three-phase three-wire system circuit, a three-phase five-wire system circuit, and the like.
An improved design of the power module 322 is further described below in conjunction with fig. 4. Fig. 4 illustrates an example block diagram of the power module 322 in the power measurement device 110 of the present disclosure. The power module 322 includes an input filter rectifier circuit 410, a high voltage linear buck circuit 412, a high voltage buck converter 414, and a low dropout regulator 416.
The power supply module 322 includes an input filter and rectifier circuit 410, the input filter and rectifier circuit 410 configured to convert the AC voltage from the circuit under test 310 to a second DC voltage.
In some embodiments, the input filter rectifier circuit 410 includes an input filter circuit and a three-phase bridge rectifier circuit. In some embodiments, the provision of a three-phase bridge rectifier circuit enables the power measurement device 110 to accommodate the requirements of different grid forms, such as single phase, three-phase wye-connected strip neutral, three-phase delta connection angle ground, etc., grid frequencies, such as 50Hz or 60 Hz. In some embodiments, the provision of a three-phase bridge rectifier circuit also enables the power measurement device 110 to continue to operate in the event of a phase-loss fault.
In some embodiments, the AC voltage suitable for input to the input filter and rectifier circuit 410 comprises a single phase 80V coveredAC50Hz to three-phase 3X 332/576VACAny AC voltage in the 60Hz range. In fig. 4, the second DC voltage V converted by the input filter rectifier circuit 410DC2Is determined by the level of the AC voltage.
The power module 322 further includes a high voltage linear buck circuit 412, the high voltage linear buck circuit 412 being connected to the input filter rectifier circuit 410 and configured to convert the second DC voltage to a third DC voltage. The provision of the high voltage linear voltage reduction circuit 412 is made possible due to the low power consumption of the controller 318 and the communication module 320.
In some embodiments, the high voltage linear voltage step-down circuit 412 employs a chip-type high voltage ceramic chip capacitor, thereby reducing the volume occupied by the high voltage linear voltage step-down circuit 412. In fig. 4, the third DC voltage V converted by the high voltage linear down-converter 412DC3Is determined by the level of the AC voltage.
The power module 322 further includes a high voltage buck converter 414, the high voltage buck converter 414 being connected to the high voltage linear buck circuit 412 and configured to convert the third DC voltage to a fourth DC voltage.
In some embodiments, the high-voltage buck converter 414 includes a buck converter with switching devices and employs a switching power supply control scheme to convert the third DC voltage from the high-voltage linear buck circuit 412 to a stable fourth DC voltage. In some embodiments, the third DC voltage VDC3In a grade range of 30VDCTo 375VDC. In some embodiments, the fourth DC voltage VDC4Is rated at 5VDC. It can be seen that in embodiments where the fourth DC voltage is stable, the high voltage buck converter 414 can convert a wide range of the third DC voltage to a stable DC voltage, thereby enabling the power measurement device 110 to accommodate different AC voltage levels.
The power module 322 further includes a low dropout regulator 416, the low dropout regulator 416 being connected to the high voltage buck converter 414 and configured to convert the fourth DC voltage to the first DC voltage.
The ldo 416 functions to provide a stable first DC voltage while reducing voltage ripples and improving the DC characteristics of the power supply. The low dropout regulator 416 can operate with a smaller input-output voltage difference and has a lower power loss than a general linear dc regulator. In embodiments where the fourth DC voltage is stable, the first DC voltage V converted by the low dropout regulator 416DC1Is rated at 3.3VDC. The first DC voltage is then provided to a current sampling module 314, a voltage sampling module 316,A controller 318 and a communication module 320.
It can be seen that the power module 322 shown in FIG. 4 includes a high voltage buck converter and a low dropout regulator to convert a wide range of DC voltages to an operating voltage suitable for use by the components of the power measurement module 110. This greatly reduces the physical size required for the circuit design of the power module 322 compared to conventional solutions that utilize two buck converters in series to achieve the same purpose, because the size of the low dropout regulator is significantly smaller than the size of the buck converter. Meanwhile, because each component in the electric energy measurement device 110 is designed with low power consumption, the maximum working current and the maximum power consumption of the electric energy measurement device 110 are significantly reduced, which further promotes the miniaturization of component selection in the power module 322. For example, the first DC voltage output at the power module 322 is 3.3VDCIn the embodiment of (2), the maximum output current of the power module 322 is 24mA, i.e. the maximum power consumption of the power module 322 is only 80 mW.
As can be seen from the above description, the power measuring device 110 in fig. 3 and 4 further achieves miniaturization and low power consumption of the power measuring device 110 by the integrated design of the controller 318 and the communication module 320 and the improved circuit design of the power supply module 322 without designing a complicated isolation circuit. Further, in combination with the arrangement of the sensing coil 312, a flexible mounting of the electrical energy measurement device 110 is achieved. The built-in communication functionality of the power measurement device 110 facilitates integration of the power measurement device 110 into a power monitoring and measurement system and accommodates various applications, such as the environments 100 and 200 of fig. 1 and 2.
The above description is intended only as an alternative embodiment of the present disclosure and is not intended to limit the present disclosure, which may be modified and varied by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (6)
1. An electrical energy measurement device (110), comprising:
a current sampling module (314) connected to the sensing coil (312) and configured to generate a current analog signal based on an AC current of a circuit under test (310) sensed by the sensing coil (312);
a voltage sampling module (316) configured to generate a voltage analog signal by collecting an AC voltage from the circuit under test (310);
a controller (318) configured to generate power measurement data for the circuit under test (310) based on the voltage analog signal and the current analog signal; and
a communication module (320) connected to the controller (318) and configured to transmit the power measurement data to an external device,
wherein the controller (318) and the communication module (320) are integrated on the same integrated circuit chip (330).
2. The electrical energy measurement device (110) of claim 1, further comprising:
a power module (322) configured to convert the AC voltage to a first DC voltage and provide the first DC voltage to the current sampling module (314), the voltage sampling module (316), the controller (318), and the communication module (320).
3. The electrical energy measurement device (110) of claim 2, wherein the power module (322) comprises:
an input filter and rectifier circuit (410) configured to convert the AC voltage to a second DC voltage;
a high voltage linear buck circuit (412) connected to the input filter rectifier circuit (410) and configured to convert the second DC voltage to a third DC voltage;
a high voltage buck converter (414) connected to the high voltage linear buck circuit (412) and configured to convert the third DC voltage to a fourth DC voltage; and
a low dropout regulator (416) connected to the high voltage buck converter (414) and configured to convert the fourth DC voltage to the first DC voltage.
4. The electrical energy measurement device (110) of claim 1, further comprising:
an analog-to-digital conversion module (324) connected to the current sampling module (314), the voltage sampling module (316), and the controller (318) and configured to convert the voltage analog signal and the current analog signal to a voltage digital signal and a current digital signal, respectively, and provide the voltage digital signal and the current digital signal to the controller (318),
wherein the controller (318) is further configured to generate the electrical energy measurement data based on the voltage digital signal and the current digital signal.
5. The electrical energy measurement device (110) of claim 1, further comprising:
an indicator light (326) connected to the controller (318) and configured to indicate a communication status.
6. The electrical energy measurement device (110) of claim 1, wherein the current sampling module (314), the voltage sampling module (316), the controller (318), and the communication module (320) are integrated on a same circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920433468.8U CN209992570U (en) | 2019-04-01 | 2019-04-01 | Electric energy measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920433468.8U CN209992570U (en) | 2019-04-01 | 2019-04-01 | Electric energy measuring device |
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| CN209992570U true CN209992570U (en) | 2020-01-24 |
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