CPC G01R 31/34 (2013.01) [B64G 1/66 (2013.01); G01R 19/22 (2013.01); H02P 29/60 (2016.02)] | 13 Claims |
1. A A current sensing module for measuring a motor phase current, the current sensing module comprising:
at least one sensing resistor disposed in-line with a phase of a motor; a current sensing circuit with two input terminals coupled across the at least one sensing resistor;
the current sensing circuit being configured to amplify a voltage across the at least one sensing resistor, thereby generating an amplified voltage;
a first operational amplifier with two first operational amplifier input terminals connected to the two input terminals;
a resistive divider coupled to the first operational amplifier to reduce the voltage to or below a set voltage;
an analog-to-digital converter configured to digitize the amplified voltage, thereby generating a digitized voltage;
wherein
a) the first operational amplifier is configured:
i) to have a unity gain;
ii) such that a full range of the analog-to-digital converter is centered a zero current,
iii) the first operational amplifier is arranged in a non-inverting configuration
b) the current sensing module is configured to operate at radiation levels of up to and including 300 Krad and survive temperatures down to and including −184° C.
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