Motor Controller Sizing Calculator

Size an EV motor controller (inverter) based on motor specifications, battery voltage, and performance requirements.

Input Parameters

Results

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Continuous Current
A
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Peak Current
A
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Controller Rating
kVA
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Est. MOSFET Count (per phase)
Note: Motor controllers must handle peak current at minimum battery voltage (end of discharge). SiC MOSFETs enable higher switching frequencies and lower losses vs IGBTs. Three-phase inverters need 6 switching positions (2 per phase).

Reference

Continuous Current = Cont Power / (V_min × Controller Eff) Peak Current = Peak Power / (V_min × Controller Eff) Controller kVA = Peak Power / Efficiency MOSFETs per phase ≈ Peak Current / 200A per device Design at V_min for worst-case current