Output power measuring circuit
By adopting an inductorless AC input DC output module and a signal processing module, the power measurement circuit structure is simplified, the high cost caused by the large number of components in the existing technology is solved, and accurate power measurement is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-03-03
Smart Images
Figure CN223966637U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of output power measurement technology, and in particular to an output power measurement circuit. Background Technology
[0002] Power metering is one of the important electrical parameters of energy storage systems. The power load capacity of energy storage devices is a crucial factor for users to select suitable energy storage products. Currently, power metering is performed using power measurement circuits. Existing power measurement circuits include a power supply module, a signal processing module, and an MCU controller. The signal processing module processes the sampled signal and sends it to the MCU controller to provide the digital pulse signal for power metering. However, existing power supply modules consist of a rectifier module, a primary-side regulator module, and multiple capacitors, resistors, and other components, resulting in a complex structure and high circuit cost. Utility Model Content
[0003] To address the aforementioned technical problems, this application provides an output power measurement circuit, comprising a power module whose input terminal is connected to the AC power supply under test, a signal processing module connected to the output terminal of the power module, and an MCU controller. The power module includes a rectifier diode D1 and an inductorless AC input DC output module connected to the rectifier diode D1. The signal processing module includes a sampling module and a signal amplification and processing module connected to the sampling module. The output terminal of the inductorless AC input DC output module is connected to the input terminal of the sampling module, and the output terminal of the sampling module is connected to a load. The signal amplification and processing module is connected to the MCU controller. The inductorless AC input DC output module uses a KP3310 linear regulator.
[0004] Preferably, the inductorless AC input DC output module includes several Dra in pins, VOUT pins, SEL pins, VDD pins, and GEN pins. The rectifier diode D1 is connected to the Dra in pin, the VOUT pin is connected to a capacitor C2 and is used to output voltage, the SEL pin is grounded through a resistor L1, the VDD pin is grounded through a capacitor C1, and the GEN pin is grounded.
[0005] Preferably, when the SEL pin is floating, the VOUT pin outputs a voltage of 3.3V; when the SEL pin is grounded, the VOUT pin outputs a voltage of 2.7V; when the SEL pin is connected in series with resistor L1 and grounded, the VOUT pin outputs a voltage of 5V, and the resistance of resistor L1 is 100K.
[0006] Preferably, the sampling module is connected to the signal amplification and processing module via a limiting protection circuit.
[0007] Preferably, the signal processing module further includes a voltage signal acquisition module connected to the signal amplification and processing module, the voltage signal acquisition module including R5, R6, R7, R8, R9, R10, and R11 connected in series.
[0008] As can be seen from the above, the following beneficial effects can be obtained by applying the power supply module provided in this application: the power supply module is connected to the AC power under test through the input terminal, the signal processing module is connected to the output terminal of the power supply module, and the MCU controller is provided. The power supply module includes a rectifier diode D1 and an inductorless AC input DC output module connected to the rectifier diode D1. The signal processing module includes a sampling module and a signal amplification and processing module connected to the sampling module. The output terminal of the inductorless AC input DC output module is connected to the input terminal of the sampling module. The output terminal of the sampling module is connected to the load. The signal amplification and processing module is connected to the MCU controller. The power supply module of this solution uses an inductorless AC input DC output module to convert the input AC power into the output DC power, thereby reducing the number of circuit components and simplifying the circuit structure. Attached Figure Description
[0009] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only a part of the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0010] Figure 1 This is a schematic diagram of an inductorless AC input DC output module according to an embodiment of this application;
[0011] Figure 2 This is a schematic diagram of the output power measurement circuit in an embodiment of this application. Detailed Implementation
[0012] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0013] Example
[0014] To address the aforementioned technical problems, this embodiment provides an output power measurement circuit, such as... Figure 1-2As shown, the system includes a power supply module whose input is connected to the AC power supply under test, a signal processing module connected to the output of the power supply module, and an MCU controller. The power supply module includes a rectifier diode D1 and an inductorless AC input / DC output module connected to the rectifier diode D1. The signal processing module includes a sampling module and a signal amplification and processing module connected to the sampling module. The output of the inductorless AC input / DC output module is connected to the input of the sampling module, and the output of the sampling module is connected to the load. The signal amplification and processing module is connected to the MCU controller. This solution uses an inductorless AC input / DC output module to convert the input AC power into the output DC power, thereby reducing the number of components and simplifying the circuit structure.
[0015] Specifically, the inductorless AC input DC output module uses a KP3310 linear regulator. Furthermore, the module includes several Dra in pins, VOUT pins, SEL pins, VDD pins, and GEN pins. A rectifier diode D1 is connected to the Dra in pin. A capacitor C2 is connected to the VOUT pin, which is used for output voltage. The SEL pin is grounded through a resistor L1, the VDD pin is grounded through a capacitor C1, and the GEN pin is grounded. Thus, the power module uses a single KP3310 linear regulator; two capacitors and one resistor are sufficient to complete both AC input and DC output functions, simplifying the circuit structure and saving costs.
[0016] In the above solution, the KP3310 is a compact, inductor-free, offline linear regulator. The KP3310 linear regulator integrates comprehensive protection functions with self-recovery capabilities, including VDD undervoltage protection, VDD overvoltage protection, output overload protection, output undervoltage protection, lightning surge protection, and built-in over-temperature protection. Simultaneously, by adjusting the resistance value of the SEL pin, the VOUT pin can output three levels of voltage: 5V, 3.3V, and 2.7V. For example, when the SEL pin is floating, VOUT outputs 3.3V; when the SEL pin is grounded, VOUT outputs 2.7V; and when the SEL pin is connected in series with a 100kΩ resistor L1 and grounded, VOUT outputs 5V.
[0017] Furthermore, the sampling module is connected to the signal amplification and processing module via a limiting protection circuit. The limiting protection circuit consists of resistors R3 and R4; the acquired current signal is limited by R3 and R4 and then input to the differential signal receiving ports 2 and 3 of the signal amplification and processing module. The voltage signal acquisition module includes resistors R5, R6, R7, R8, R9, R10, and R11 connected to the power supply module, forming a stepped voltage signal acquisition module that inputs the acquired voltage signal to pin 4 of the signal amplification and processing module.
[0018] Furthermore, the signal processing module also includes a voltage signal acquisition module connected to the signal amplification and processing module. This voltage signal acquisition module comprises resistors R5, R6, R7, R8, R9, R10, and R11 connected in series, forming a stepped voltage signal acquisition module. This module inputs the voltage signal of the AC current under test to pin 4 of the signal amplification and processing module. It also includes capacitors C7 and C8 connected to the sampling module and C9 connected to the voltage signal acquisition module. C7 and C8 are used to filter the current differential signal, and C9 is used to filter the voltage signal.
[0019] like Figure 2 As shown, pin 1 of the signal amplification and processing module is the positive terminal of the chip power supply; pins 2 and 3 are current differential signal input ports; pin 4 is the voltage signal input port; pin 5 is the chip power ground; pin 6 is the pulse signal output port; pin 7 is the selection pin, which can be set to output current or voltage signals as needed; and pin 8 is the configuration pin, which configures the output effective value. The inductorless AC input DC output module outputs 5V DC power to the input terminal of the sampling module. The output terminal of the sampling module is connected to the load terminal. The sampling module samples the current from the inductorless AC input DC output module. The acquired current signal is input to the signal amplification and processing module after passing through a limiting protection circuit. The signal amplification and processing module processes and converts the acquired digital signal, thereby providing the MCU controller with a digital pulse signal for power measurement, thus completing the output power measurement. The signal amplification and processing module has three ports (pins 6, 7, and 8) that connect to an external MCU controller. Pin 8 is a configuration pin, a function port used to configure the valid data value; pin 6 is a pulse signal output port, a data interface that provides digital pulse signals for power measurement; and pin 7 is a selection pin, a selection interface that selects whether the digital pulse signal output value is voltage or current.
[0020] In summary, the solution of this application uses a power module whose input terminal is connected to the AC power under test, a signal processing module connected to the output terminal of the power module, and an MCU controller. The power module includes a rectifier diode D1 and an inductorless AC input DC output module connected to the rectifier diode D1. The signal processing module includes a sampling module and a signal amplification and processing module connected to the sampling module. The output terminal of the inductorless AC input DC output module is connected to the input terminal of the sampling module, the output terminal of the sampling module is connected to the load, and the signal amplification and processing module is connected to the MCU controller. The power module of this solution uses an inductorless AC input DC output module to convert the input AC power into the output DC power, thereby reducing the number of circuit components and simplifying the circuit structure.
[0021] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.
Claims
1. An output power measurement circuit, characterized by: The application relates to a power supply module for AC power supply, which comprises a power supply module connected to an AC power supply to be tested, a signal processing module connected to the output end of the power supply module, and an MCU controller, wherein the power supply module comprises a rectifier diode D1, an inductance-free AC input DC output module connected to the rectifier diode D1, the signal processing module comprises a sampling module and a signal amplification processing module connected to the sampling module, the output end of the inductance-free AC input DC output module is connected to the input end of the sampling module, the output end of the sampling module is connected to a load, the signal amplification processing module is connected to the MCU controller, and the inductance-free AC input DC output module adopts a linear stabilizer with a model number of KP3310.
2. The output power measurement circuit of claim 1, wherein: The linear stabilizer with the model number of KP3310 comprises a plurality of Drain pins, a VOUT pin, a SEL pin, a VDD pin and a GEN pin, the rectifier diode D1 is connected to the Drain pin, the VOUT pin is connected with a capacitor C2, the VOUT pin is used for outputting voltage, the SEL pin is grounded through a resistor L1, the VDD pin is grounded through a capacitor C1, and the GEN pin is grounded.
3. The output power measurement circuit of claim 2, wherein: When the SEL pin is suspended, the VOUT pin outputs 3.3V voltage; when the SEL pin is grounded, the VOUT pin outputs 2.7V voltage; and when the SEL pin is connected with the resistor L1 and grounded, the VOUT pin outputs 5V voltage, and the resistance value of the resistor L1 is 100K.
4. The output power measurement circuit of claim 1, wherein: The sampling module is connected to the signal amplification processing module through a limiting protection circuit.
5. The output power measurement circuit of claim 1, wherein: The signal processing module further comprises a voltage signal acquisition module connected to the signal amplification processing module, and the voltage signal acquisition module comprises R5, R6, R7, R8, R9, R10 and R11 connected in series.