Reference Designs
Single-Ended Signal Conditioning Circuit for Current and Voltage Measurement Using Fluxgate Sensors
Texas Instruments
This design provides a 4-channel signal conditioning solution for single-ended SAR ADCs integrated into a microcontroller measuring motor current using fluxgate sensors. Also provided is an alternative measurement circuit with external SAR ADCs as well as circuits for high-speed overcurrent and earth fault detection. Proper signal conditioning improves noise immunity on critical current measurements in motor drives. This reference design can help increase the effective resolution of the analog-to-digital conversion: improving motor drive efficiency.
Features
- Designed to measure all three phase motor currents along with DC link current through 6A Fluxgate Sensors (Scalable to 50A)Single-ended Signal Conditioning Circuit to interface Fluxgate Sensors with single-ended SAR ADCsMeasures current and voltage through integrated SAR ADCs of TI Piccolo™ F28027 microcontroller with a provision to interface the signal conditioning circuit with External ADCsTwo on-board 14-bit Dual Channel Simultaneous Sampling SAR ADCs with 4-wire SPI to interface with external motor controllersOverload and Earth Fault Protections for each channel with
Applications
- AC drive power stage module
- Motor diagnostics & monitoring
- Servo drive power stage module
- Servo drive power supply module
- Multifunction relay
- Residential breakers
- Condition monitoring sensor
- Substation automation
- Robot servo drive
Product Categories
- Amplifiers
End Equipment Reference Diagrams
Application Area
End Equipment
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