Analog Devices Inc. ADE7978 三相电能计量 IC
亚德诺半导体 ADE7978 是一款高精度、三相电能测量 IC，带若干串行接口和三个灵活的脉冲输出。ADE7978 最多可与四个 ADE7933/ ADE7932 设备连接。器件包含执行总（基波和谐波）有功/无功/视在功率测量和有效值计算，以及仅基波有功/无功功率测量和有效值计算所需的所有信号处理能力。它有一个固定功能数字信号处理器(DSP)负责实现这种信号处理。ADE7978 可测量各种三相四线、三相三线配置的有功/无功/视在功率，例如星形或三角形等。该器件提供系统校准功能，可进行各相校准、增益校准和可选失调校正。还提供相位补偿，但是由于电流采用分流器进行感应，因而不是必需的。CF1、CF2 和 CF3 逻辑输出可提供许多功率信息：总有功/无功/视在功率、电流有效值；基波有功/无功功率。
ADE7978 measures the active, reactive, and apparent energy in various 3-phase configurations, such as wye or delta services, with both three and four wires. The device provides system calibration features for each phase, gain calibration, and optional offset correction. Phase compensation is also available, but it is not necessary because the currents are sensed using shunts. The CF1, CF2, and CF3 logic outputs provide a wide selection of power information: total active, reactive, and apparent powers; the sum of the current rms values; and fundamental active and reactive powers.
特性
- Enables shunt current sensors in polyphase energy meters
- Immune to magnetic tampering
- Highly accurate; supports EN 50470-1, EN 50470-3, IEC 62053-21, IEC 62053-22, IEC 62053-23, ANSI C12.20, and IEEE 1459 standards
- Compatible with 3-phase, 3- or 4-wire (delta or wye) meters and other 3-phase services
- Computes active, reactive, and apparent energy on each phase and on the overall system
- Less than 0.2% error in active and reactive energy over a dynamic range of 2000 to 1 at TA = 25°C
- Less than 0.1% error in voltage rms over a dynamic range of 500 to 1 at TA = 25°C
应用
- Shunt-based polyphase meters
- Power quality monitoring
- Solar inverters
- Process monitoring
- Protective devices
- Isolated sensor interfaces
- Industrial PLCs
Block Diagram
发布日期: 2014-04-21
| 更新日期: 2022-03-11