Espressif ESP32-S3-WROOM-1
Dual-Site Three-Phase Power Quality Analyzer
Überblick
A modular 24-bit 32 kS/s dual-site power quality analyzer designed for permanent industrial switchboard and substation monitoring of two 3-phase 4-wire electrical networks.
Marcel ClementSystemarchitektur
POWER
MCU
SENSOR
RF
- POWER_MGMT → CENTRAL_HOSTPowerPowers the central host MCU and wireless subsystem
- POWER_MGMT → SITE_A_AFEPowerPowers Site A digital and isolated analog front-end components
- POWER_MGMT → SITE_B_AFEPowerPowers Site B digital and isolated analog front-end components
- CENTRAL_HOST → SITE_A_AFESPIHigh-speed synchronous data transfer for Site A 24-bit waveforms
- CENTRAL_HOST → SITE_B_AFESPIHigh-speed synchronous data transfer for Site B 24-bit waveforms
- CENTRAL_HOST → WIRELESS_RFGPIOInternal control and status telemetry for wireless link
Stückliste
| Teilenummer | Typ | Komponente | Hersteller | Gehäuse | Menge | Datenblatt | Übereinstimmung |
|---|---|---|---|---|---|---|---|
| LMR16006 | POWER | TI LMR16006 / TPS54360 Industrial Step-Down Regulator Converts external 24 VDC industrial DIN-rail power to stable internal rails (5V, 3.3V, isolated rails). | Texas Instruments / Diodes Incorporated | — | 1 | Ausstehend | |
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| ESP32-S3-WROOM-1 | MCU | Espressif ESP32-S3-WROOM-1 Manages FreeRTOS tasks, power quality calculations (IEC 61000-4-30), data logging, and Wi-Fi/BLE streaming. | Espressif Systems | Cloud Platform / Software Solution | 1 | Übereinstimmend | |
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| ADS131M08 | SENSOR | TI ADS131M08 & AMC3330 Simultaneous 24-bit 32 kS/s sampling of 3-phase voltages (via AMC3330 isolators) and currents for Network A. | Texas Instruments / Microchip Technology | — | 1 | Ausstehend | |
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| ADS131M08 | SENSOR | TI ADS131M08 & AMC3330 Simultaneous 24-bit 32 kS/s sampling of 3-phase voltages and currents for independent Network B. | Texas Instruments | — | 1 | Übereinstimmend | |
| ESP32-S3 | RF | Integrated ESP32-S3 RF Frontend with External Antenna Provides reliable wireless data streaming and mobile device provisioning through switchboard metal doors. | Espressif Systems | 56-VFQFN Exposed Pad | 1 | Übereinstimmend | |
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Bauanleitung
6-8 hoursAdvanced
1
Procurement & Preparation
- Procure and verify components according to the BOM, including the LMR16006 step-down regulator, ESP32-S3-WROOM-1 module, dual ADS131M08 ADCs, and AMC3330 isolated amplifiers.
- Inspect the 4-layer industrial printed circuit board (PCB) for manufacturing defects, checking power plane continuity and isolation spacing between high-voltage analog front-ends (Site A and Site B) and low-voltage digital sections.
2
Hardware Assembly & Wiring
- Apply lead-free solder paste to the PCB pads using a stainless steel stencil, focusing on the central host ESP32-S3-WROOM-1, power management ICs, and dual ADS131M08/AMC3330 analog front-end circuits.
- Place all surface-mount components (LMR16006, ESP32-S3-WROOM-1, ADS131M08, AMC3330) onto their designated footprints using a pick-and-place machine or precision manual placement.
- Reflow the populated PCB through a multi-zone convection reflow oven with a standardized lead-free thermal profile.
- Mount the external high-frequency antenna connector to the enclosure bulkhead and route the RF coaxial cable to the ESP32-S3 RF frontend, then wire the 24 VDC industrial DIN-rail power input to the POWER_MGMT module.
3
Firmware Setup
- Connect a USB-to-UART bridge to the programming header of the ESP32-S3-WROOM-1 module to configure the development environment using ESP-IDF and FreeRTOS.
- Compile and flash the firmware supporting simultaneous SPI data acquisition from Site A and Site B ADS131M08 ADCs at 32 kS/s, real-time IEC 61000-4-30 power quality calculations, and wireless streaming routines.
- Provision the wireless frontend for Wi-Fi/BLE streaming and verify local data logging routines on FreeRTOS task queues.
4
Testing & Calibration
- Perform power-on self-test (POST) to measure internal voltage rails (5V, 3.3V, ISO_VDD) generated by the LMR16006 regulator.
- Inject precision 3-phase AC voltage and current waveforms into the AMC3330 isolators and ADS131M08 inputs for both Site A and Site B independently.
- Calibrate gain and phase offsets for all 6 measurement channels (3 phases for Network A, 3 phases for Network B) to ensure compliance with high-accuracy power quality measurement standards.
- Execute a 24-hour burn-in and thermal stress test inside an environmental chamber while continuously streaming dual-site power quality data over Wi-Fi.
Dokument
Dual-Site Three-Phase Power Quality Analyzer
A modular 24-bit 32 kS/s dual-site power quality analyzer designed for permanent industrial switchboard and substation monitoring of two 3-phase 4-wire electrical networks.
Design Overview
| Item | Details |
|---|---|
| Product Type | Dual-Site Three-Phase Power Quality Analyzer |
| Key Functions | Simultaneous waveform acquisition for two independent 3-phase 4-wire electrical networks (230/400 V, 50 Hz), 24-bit, 32 kS/s-per-channel high-precision analog-to-digital conversion using ADS131M08, Galvanically isolated ±400 V phase-to-neutral voltage measurement via AMC3330 isolation amplifiers, External current transducer interfacing with 3 dedicated ADC channels per node, Real-time data streaming and remote wireless management via Wi-Fi and Bluetooth LE, Modular dual-site architecture designed for permanent industrial switchboards and substations |
| Power Source | External 24 VDC industrial DIN-rail power supply |
| Connectivity | WiFi, Bluetooth LE |
| Size | Dual modular DIN-rail enclosures |
| Environment | indoor |
| Difficulty | Advanced |
| Est. Time | 6-8 hours |
System Architecture
Power Topology: External 24 VDC industrial DIN-rail power supply feeds a high-efficiency step-down regulator to generate primary 5V and 3.3V rails, with isolated DC/DC converters supplying isolated power domains for AMC3330 isolation amplifiers.
Module List
| Module ID | Type | Name | Function | Voltage |
|---|---|---|---|---|
| POWER_MGMT | POWER | TI LMR16006 / TPS54360 Industrial Step-Down Regulator | Converts external 24 VDC industrial DIN-rail power to stable internal rails (5V, 3.3V, isolated rails). | 24V |
| CENTRAL_HOST | MCU | Espressif ESP32-S3-WROOM-1 | Manages FreeRTOS tasks, power quality calculations (IEC 61000-4-30), data logging, and Wi-Fi/BLE streaming. | 3.3V |
| SITE_A_AFE | SENSOR | TI ADS131M08 & AMC3330 | Simultaneous 24-bit 32 kS/s sampling of 3-phase voltages (via AMC3330 isolators) and currents for Network A. | 3.3V |
| SITE_B_AFE | SENSOR | TI ADS131M08 & AMC3330 | Simultaneous 24-bit 32 kS/s sampling of 3-phase voltages and currents for independent Network B. | 3.3V |
| WIRELESS_RF | RF | Integrated ESP32-S3 RF Frontend with External Antenna | Provides reliable wireless data streaming and mobile device provisioning through switchboard metal doors. | 3.3V |
Design Schemes
Dual-Node Modular ARM Cortex-M7 with Isolated Delta-Sigma Architecture ★
Dual independent measurement nodes featuring ADS131M08 and AMC3330 isolation amplifiers managed by a central ESP32-S3 host.
Trade-offs: Offers superior high-voltage safety compliance and simultaneous sampling integrity compared to optocoupler-based or shared-ADC designs.
Key IC selection
Main compute and power quality DSP engine
- Need: Dual-core processing capability for real-time IEC 61000-4-30 Class A calculations across 16 total ADC channels (2 sites x 8 channels) plus Wi-Fi/BLE stack overhead.
- Class: Wi-Fi + BLE enabled 32-bit dual-core microcontroller (MCU/SoC)
- Shortlist: Espressif ESP32-S3 series, STMicroelectronics STM32H7 series + external Wi-Fi module
- Pick: Select ESP32-S3-WROOM-1 module for integrated dual Xtensa LX7 cores, native Wi-Fi/BLE, ample SRAM for circular DMA buffers, and module-level FCC/CE certification.
High-precision simultaneous sampling analog front-end
- Need: Simultaneous sampling of 3-phase voltages and currents at >=32 kS/s with 24-bit resolution to capture fast transients and high-order harmonics.
- Class: Simultaneous-sampling delta-sigma analog-to-digital converter
- Shortlist: TI ADS131M08, Analog Devices AD7768-4
- Pick: Select TI ADS131M08 for its 8 simultaneous channels, integrated negative charge pump, low drift, and SPI interface matching the dual-site architecture requirement.
Industrial DC-DC step-down regulation
- Need: Accept harsh 24 VDC industrial bus voltages with high transient immunity and step down efficiently to 5V/3.3V system rails with low ripple.
- Class: High-input-voltage synchronous step-down DC-DC regulator
- Shortlist: TI TPS54360, TI LMR16006
- Pick: Select TI TPS54360 for high input voltage tolerance (up to 60V) and robust 3.5A output current capability to drive host MCU, dual ADCs, and isolation power.
Risk register
| ID | Area | Severity | Detail | Mitigation |
|---|---|---|---|---|
| r1 | emi | high | Switchboard environments feature high electromagnetic interference (EMI) from VFDs and heavy contactors, which can couple noise into the unshielded external current transducer cabling and AMC3330 voltage inputs. | Implement rigorous PCB layout practices with a solid continuous ground plane beneath the AFE, use differential RC filtering on all ADC inputs, and ensure proper chassis grounding of the metallic switchboard enclosure. |
| r2 | firmware | high | The ESP32-S3 must simultaneously ingest 32 kS/s x 16 channels of 24-bit data via SPI, execute heavy IEC 61000-4-30 power quality FFT/harmonics algorithms, and maintain Wi-Fi/BLE streaming without buffer overflows or watchdog resets. | Offload data transfers completely to hardware SPI using dual-buffered DMA descriptors, pin FreeRTOS tasks handling DSP to Core 1, and reserve Core 0 strictly for networking and background tasks. |
| r3 | mech | med | Installing the dual-site analyzer inside grounded metal switchboard panels will severely attenuate 2.4 GHz Wi-Fi and Bluetooth LE signals, leading to dropped remote monitoring connections. | Use an ESP32-S3 module variant with an external antenna connector (e.g., U.FL) and route an industrial-grade bulkhead-mount antenna to the outside of the metal cabinet door. |
Key Components
3/5 modules matched to real parts. See the BOM tab for the full component table.
TI LMR16006 / TPS54360 Industrial Step-Down Regulator (LMR16006)
Web recommendation: LMR16006 (not in ES)
Espressif ESP32-S3-WROOM-1 (ESP32-S3-WROOM-1)
The candidate ESP32-S3-WROOM-1 matches the primary MPN and preferred manufacturer Espressif.
TI ADS131M08 & AMC3330 (ADS131M08)
Rejected weak/wrong-class catalog hits; using web recommendation: ADS131M08
Build Summary
- Difficulty: Advanced
- Estimated time: 6-8 hours
- Tools required: Antistatic tweezers, Digital Multimeter, Magnifying glass, PCB Stencil, Squeegee, Pick-and-place machine
See the Build tab for the full step-by-step assembly guide.
Generated by YuanQi AI Design System · Query: Dual-Site Three-Phase Power Quality Analyzer: A modular 24-bit, 32 kS/s-per-channel waveform acquisition system for simultaneous monitoring of two 230/400 V, 50 Hz, 3-phase 4-wire electrical networks. Each measurement node provides three galvanically isolated ±400 V phase-to-neutral voltage channels based on AMC3330 isolation amplifiers and an 8-channel simultaneous-sampling ADS131M08 ADC. Three additional ADC channels per node are reserved for external current transducers.