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    Dumb question about BLDC motor voltage

    Supposed I have a motor with the following ratings: Power: 7 kW Torque 14.8 Nm Speed: 4500 rpm Voltage 55.5 V (IP 54) Current: 90 A (Duty S1 -EN 60034) Ke: 11.2 V/1000rpm Assuming that this motor would be driven by a controller that monitors DC bus voltage, phase current, employs FOC, and can...
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    Lead current limit for different MOSFET packages?

    I am trying to put together a power stage for the Lebowski controller that can output a short duration maximum of ~18 kW from a ~60 V nominal 16s high capacity battery pack. The resulting peak (as in occasional, short duration) current is going to be about 70% of the maximum battery discharge...
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    Heatsink useful for 15s3p Zippy Lipo battery pack?

    I am going to build a 15s3p from 15 pcs 3s 5000mAh 20C Zippy packs. Two stacks of 5 pcs paralleled in 3 rows. Is it beneficial to put aluminum plates between the rows or should I just sandwich the whole pack in an aluminum housing? Attached picture shows arrangement with aluminum plates...
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    Mystery 18-FET controller

    Does anybody recognize this controller? I am trying to figure out the purpose of the connection wires. DC power, phases, halls, throttle, and self-learning are obvious but who knows what the rest is for. BTW: How do I make the pictures visible in the text? FIXED: Pictures need to be...
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    Charging of HK Zippy 3s1p 5Ah assembled as 6s6p

    I have a 6s6p pack consisting of twelve 3s1p Zippy 5Ah Lipos. Can I charge this as a 6s with 6 cells being charged in parallel?
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    LiFePO4 batteries for Dive Propulsion vehicle

    I am trying to decide on batteries for a DPV or underwater scooter, which is essentially a waterproof tube containing battery, controller and motor with a shrouded propeller on the end. The motor is a 24V300W Kollmorgen driven by a 9 FET Lyen controller. The DPV will be operated under 600W...
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