Sensors

Field Current Sensor

Overview

Allegro Microsystem’s field sensor evaluation board has three current sensors ACS37610 (S-Notch), ACS37610 (Straight Notch), ACS70310 are populated. It also has a bus bar which has the capability to carry 400 A. It has an onboard LDO which can step down voltage from 12 to 5 V to power the sensors.

Board features:

High operating bandwidth: DC to 240 kHz (ACS70310),
Sensitivity ±1% (typical)
Very fast response time (<2 μs typical)
Wide sensing range (3 to 28 mV/G – ACS37610)
Wide selectable sensitivity range between 0.5 and 11.5 mV/G (ACS70310)
High operating bandwidth: DC to 250 kHz (ACS37610)

See lab in action

Capabilities

Power supply which can source DC current up to 400A,
Relay contactors to switch the direction of current,
Thermal camera sensor to monitor the busbar temperature,
Oscilloscope to log the current sensor data,
Certified shunt with 0.25% tolerance for reference scale.

Features

Monitor the current sensor’s performance against the reference across different panes of the LiveBench.
Examine the hysteresis in the core based sensor (ACS70310)
Analyze the consistency of the sensor output for repeated readings.
Observe the effect of crosstalk on the sensor performance (ACS37610) with straight and S notch, and evaluate the sensitivity of the current sensors.
Obtain the transient response of the current sensors.
Visualize the thermal profile of the busbar near the notch.

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