US 11,703,544 B2
Current sense multi-chip module
Gary S. Bolotin, Pasadena, CA (US); Don J. Hunter, LaVerne, CA (US); Malcolm L. Lias, Pasadena, CA (US); Ben Cheng, Pasadena, CA (US); John J. Waters, Pasadena, CA (US); and Sunant Katanyoutanant, Monterey Park, CA (US)
Assigned to CALIFORNIA INSTITUTE OF TECHNOLOGY, Pasadena, CA (US)
Filed by CALIFORNIA INSTITUTE OF TECHNOLOGY, Pasadena, CA (US)
Filed on Jun. 4, 2021, as Appl. No. 17/339,502.
Claims priority of provisional application 63/037,447, filed on Jun. 10, 2020.
Prior Publication US 2021/0389377 A1, Dec. 16, 2021
Int. Cl. G01R 31/34 (2020.01); H02P 29/60 (2016.01); G01R 19/32 (2006.01); B64G 1/66 (2006.01); G01R 19/22 (2006.01)
CPC G01R 31/34 (2013.01) [B64G 1/66 (2013.01); G01R 19/22 (2013.01); H02P 29/60 (2016.02)] 13 Claims
OG exemplary drawing
 
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.