Power Meter (Three-phase)
详情介绍
Overview
The use of power meters which are capable of remotely controling a variety of household appliances and systems is increasing. This is a result of an increase in awareness and demand for energy-efficiency and environmental friendliness. This, in turn, has made the usage of local energy resources more efficient. As power meters become a communication gateway to the home, they are becoming more advanced in both their performance and functionality.
A power meter must operate on its internal battery from factory shipment to the installation. Low-power consumption is essential when only the real-time clock (RTC) is running. Also needed are multiple communication interfaces for AMR and AMI support, infrared communication for meter reading, and data transfer to and from prepaid cards.
Within the microcontroller (MCU) lineup offered by Renesas, RX200 Series and RL78 Family provide the high performance, large memory capacity, and low power consumption required by three-phase meters. Above all, RX21A Group and RL78/I1C Group which are the microcontrollers for controlling the power meter, reduce costs by reducing the number of external components and improves operability with the built-in 24-bit ΔΣ (delta-sigma) ADC in addition to the main features. Also they support enhanced security functions with AES H/W integration for smart meters . Renesas offers a lineup of microcontrollers with built-in ZigBee/IEEE802.15.4 and Power Line Communication (PLC) functions essential to smart meters.
System Block Diagram (Main control block: MCU with embedded ΔΣADC)
System Block Diagram (Main control block: MCU with no embedded ΔΣADC)
System Block Diagram (Sensor and power supply block)
Recommended Products
| Block | Semiconductor device | Recommended products | Features, etc. |
|---|---|---|---|
| Control MCU | MCU (ΔΣ ADC integrated) | RL78/I1C Group | 16-bit CPU, 24-bit ΔΣADC, LCD controller/driver, battery back up, AES |
| RX21A Group | 32-bit CPU, low power consumption, high capacity memory, 24-bit ΔΣADC(7units, SNDR 85dB) |
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| MCU | RL78/L1x Series | 16-bit CPU, ultra low power consumption, LCD driver |
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| RX210 Group | 32-bit CPU (50MHz max), high capacity memory, low power, max 7ch communication function |
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| RX220 Group | 32-bit CPU (32MHz max), low pin count, low power, max 5ch communication function |
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| EEPROM | R1EX24xxx Series | I 2 C bus interface *1 | |
| R1EX25xxx Series | SPI bus interface *2 | ||
| Communication control block | MCU | RL78/G13 Group | 16-bit CPU |
| RX210 Group | 32-bit CPU (50MHz max), high capacity memory, low power, max 7ch communication function |
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| RX220 Group | 32-bit CPU (32MHz max), low pin count, low power, max 5ch communication function |
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| RX631 Group | 32-bit CPU | ||
| RS485 signal I/F | Photocoupler (standard) |
PS23xx Series PS27xx Series PS28xx Series |
High isolation voltage (5kVr.m.s.), 4p-LSOP, Ta=115°C High isolation voltage (3.75kVr.m.s.), 4p-SOP, Ta=110°C High isolation voltage (2.5kVr.m.s.), 4p-SSOP, Ta=110°C |
| Photocoupler (high-speed) |
PS91xx Series (SOP) PS93xx Series (SDIP) PS98xx Series (Small SOP) PS99xx Series (LSDIP) |
Digital output ～15Mbps Low supply current |
*1 I 2 C: Inter-Integrated Circuit
*2 SPI: Serial Peripheral Interface
Related Application Notes/Sample Code
Related Boards
| Title | Document No. |
|---|---|
| Renesas Starter Kit for RX210 | R0K505210S000BE |