Motor Current Sensor

Measures the current in each of a motor's three phases — and it is measurement and protection in one part, because phase current is both how the inverter knows the torque it is delivering and how it detects an overcurrent microseconds before its own silicon melts. The sensors sit inside the inverter assembly around the phase conductors, so "replacing the current sensor" is usually inverter work whatever the invoice says — which gives their external signal wiring unusual diagnostic value, being the half of the circuit a workshop can reach without opening anything expensive. Their characteristic wear-out is offset drift: at power-on every phase should read exactly zero, and a sensor whose zero has drifted fails that check while working normally otherwise.

Also known as: phase current sensor, current transducer, inverter current sensor, hall current sensor

Referenced by 73 codes

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Codes involving this component (73)

Other components in Hybrid Propulsion

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