6 HPWM signal generation with PIC18F4431

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  1. - 10th February 2011, 20:22 #1
    pxidr84's Avatar
    pxidr84
    pxidr84 is offline Member
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    Lightbulb 6 HPWM signal generation with PIC18F4431

    Hi there,

    I'm currently making a 3-phase variable frequency drive.
    I'm using the PIC18F4431 (5V - 40 pins - 40MHz), who's perfect for motor control (8 hardware PWM outputs).

    Datasheet : http://ww1.microchip.com/downloads/e...Doc/39616d.pdf

    I like to generate 3 high-side hardware PWM (HU, HV, HW) and 3 low-side hardware PWM (LU, LV, LW - same as HU, HV, HW but inverted with a low deadtime) for fed my high and low-side IGBTs.
    I would like a PWM carrier frequency between 2 and 20kHz (approx.)

    Picbasic Pro seems to use CCP1 and CCP2 modules with "HPWM" command, but I get only 2 HPWM outputs.
    I have no idea how to use these hardware PWM modules on my PIC.

    Thanks for your help.
    Last edited by pxidr84; - 10th February 2011 at 20:27.
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