Recent content by chbaird

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    12 kw rc motor

    Thanks for the fix, and nice video! Like Arlo, I'm building a homebrew controller, but unlike Arlo, I have no Colossus to test on. :-( How do I get me grubby fingers on one of these?
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    12 kw rc motor

    Video is listed as private...
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    A123 Systems: 'No assurance' it can continue to operate

    Update 2012/10/18 http://www.washingtonguardian.com/battery-makers-beltway-power-play Even as advanced battery maker A123 Systems struggled for financial viability, it played the Washington insider game, where political money and access go hand in hand. The Massachusetts firm dished out nearly...
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    A123 Systems: 'No assurance' it can continue to operate

    The Solyndra of the week is A123 Systems, an electric vehicle battery company based in Massachusetts. The firm also has battery plants in Michigan, where former Democratic Gov. Jennifer Granholm once heralded A123 as a federal stimulus “success story.” Former House Speaker Nancy Pelosi visited...
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    gokart battery

    A mechanical switch works great until it welds itself closed and you can't open it when you're going 90+ mph down a very short road.. :)
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    Tabletop Engine Dyno *Build In Progress*

    Have you considered using the electrical energy created by the alternator to feed back into your controller (perhaps through a boost converter if you're only generating 12v)? This way you'd only need to supply energy from a power supply or battery that would be equal to the losses of the...
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    Not simple BLDC controller It RUNS! :)

    Also, according to p30F4011.h /* PWMCON1 */ #define _PEN1L PWMCON1bits.PEN1L #define _PEN2L PWMCON1bits.PEN2L #define _PEN3L PWMCON1bits.PEN3L #define _PEN1H PWMCON1bits.PEN1H #define _PEN2H PWMCON1bits.PEN2H #define _PEN3H PWMCON1bits.PEN3H #define _PMOD1 PWMCON1bits.PMOD1 #define _PMOD2...
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    Not simple BLDC controller It RUNS! :)

    if you write: PWMCON1bits.PMOD1 = 1; the PWM1 I/O pair operates in complementary mode (essential for PMSM or BLDC controller). Conversely, if you write: PWMCON1bits.PMOD1 = 0; The IO pins operate operate independently of each other. Similarly, if you write: PWMCON1bits.PEN4H = 1; the pin...
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    Arlo's power stage Leaf controller runs and drives page 103

    I'm one of the "guests" who's been lurking in the shadows, but I'd like to take this opportunity to make my first ES post and stick my neck out for Arlo. I recently finished a high-voltage (up to 450 V) high frequency (up to 500 kHz) h-bridge and used DC-DC 1kV isolated supplies to power...
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