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ADC Puts It All Together for Isolated Current Sensing
['Bill Schweber']
Home | Electronic Design
Current sensing is critical for enabling overload protection, monitoring loads, and regulating the performance in motors.
With accurate current sensing, the motor controller can manage the motor’s speed, torque, and other characteristics, respond to changing conditions, and ensure its longevity and efficiency.
Sensing the current to each motor phase is pivotal in servo and motor drives for robotics, ranging from pick-and-place to surgical robots.
However, current sensing tends to come with the need for galvanic isolation, primarily for protecting against short circuits (including to nearby AC lines) and other safety hazards.
To address this problem, Texas Instruments introduced the AMC0106M25, a high-precision, isolated delta-sigma modulator that can serve as the heart of the ADC sensing current in high-efficiency motors and servo drives (Fig.
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