This reference design aids in optimizing circuit efficiency, making certain precision, and enabling revolutionary options like real-time information analytics and distant monitoring.
A single-phase shunt vitality meter reference design is a vital device in fashionable vitality administration methods, offering correct measurement and monitoring {of electrical} vitality consumption. Its significance lies in its potential to boost effectivity, scale back prices, and help sustainability efforts. Functions vary from residential and industrial vitality metering to good grids and IoT-enabled gadgets. For design engineers, it simplifies the event course of by providing a pre-validated platform, decreasing time-to-market and making certain compliance with trade requirements.Â
The rising accuracy necessities and processing calls for of contemporary electrical energy meters have made it difficult to rely solely on a single metrology system-on-chip (SoC). A dual-chip structure, combining a standalone ADC and a number microcontroller (MCU), offers an efficient resolution by overcoming these limitations and enabling versatile, market-specific designs. This reference design TIDA-010940 by Texas Devices (TI) leverages a high-accuracy standalone ADC, such because the ADS131M03, paired with an ultra-low-power MSPM0L2228 MCU, making a cost-efficient platform for single-phase electrical energy meters.
The ADS131M03 is a three-channel, 24-bit delta-sigma ADC that achieves 0.5S accuracy utilizing a shunt present sensor. Its simultaneous-sampling functionality ensures exact measurements whereas sustaining value effectivity. The MSPM0L2228 MCU helps segmented LCDs with as much as 8×51 or 4×55 customizable COM and SEG strains, enabling compact and environment friendly PCB layouts. Moreover, its VBAT energy area contains important options corresponding to a real-time clock, tamper detection, time-stamping, and backup reminiscence, making certain reliability and performance throughout energy outages. The MCU additionally facilitates communication with help for exterior SPI FLASH reminiscence and twin UART interfaces, together with an IrDA optical port (EN 62056-21) and an remoted RS-485 connection. The RS-485 interface employs capacitive galvanic isolation, making certain sturdiness and an prolonged lifespan, which is essential for industrial purposes.
This reference design’s firmware processes information from the ADC in actual time to calculate vital metrology parameters corresponding to energetic, reactive, and obvious vitality, RMS voltage/present, energy issue, and line frequency. These metrics might be visualized by a calibration GUI or pulsed outputs, seamlessly integrating with metrology take a look at methods. The design achieves class 0.5S accuracy throughout a 25mA–100A enter vary with an 8kHz sampling price. Magnetic tamper detection is enabled by the DRV5032 Corridor-effect sensor, enhancing safety towards tampering makes an attempt.
Further options embrace strong vitality metrology software program built-in into the MSPM0-SDK Model 2.02.00.05, appropriate with TI Code Composer Studio, and a 5kVRMS remoted RS-485 interface for industrial-grade sturdiness. By addressing the calls for for precision, reliability, and value optimization, this design provides a scalable and superior resolution for single-phase electrical energy meters in numerous international markets.
TI has examined this reference design. It comes with a invoice of supplies (BOM), schematics, meeting drawing, printed circuit board (PCB) structure, and extra. The corporate’s web site has further information concerning the reference design. To learn extra about this reference design, click on right here.
