HFXC-5000
High Frequency Transformer
Onboard Battery Charger
for Electric Vehicles

Formulas and Equipment Used in Efficiency Tests

FORMULAS AND EQUIPMENT
USED TO CALCULATE EFFICIENCY FOR HFXC-5000 PROFILE:

EFFICIENCY =
[ [VOLTS OUT] X [AMPS OUT] ] / [ [RMS VOLTS IN] X [RMS AMPS IN] ]

VOLTS OUT measured with Beckman Instruments DM23XT 3 1/2 Digit DMM

AMPS OUT measured with B & K 2883 4 1/2 Digit DMM

RMS VOLTS IN, RMS AMPS IN, AND CURRENT THD measured with Fluke 4l Power Harmonics Analyzer

3 % CURRENT THD = 99.9+ % POWER FACTOR as shown by graph below of the fixed relationship between POWER FACTOR and CURRENT THD.

HFXC-5000 Product Reviews: