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Can this PWM the amp burst ourput in this Nerf setup?

Discussion in 'Power Electronics' started by pstar, May 7, 2018.

  1. pstar

    pstar

    6
    0
    Feb 2, 2017
    I'm modifying a Nerf blaster (toy gun). I've added an auto loading mechanism which essentially is a small motor which controls a dart loading shaft. I want to power the motor with a 2s lipo battery. I've bought a mini PWM voltage controller with the intention to control the voltage and thus the rate of speed the darts are pushed into the flywheels which propel the darts out of the blaster. The system is not connected to the flywheel motors, completely different. My concern is will the motor with the 2s lipo over load this pwm at stall speed, spiking more than the 5 amp rating of the pwm. The pwm has a a built in circuit breaker of some type. I'd use a larger PWM but the blaster has extremely limited internal space and I don't want to mount it on the outside of the blaster shell. I'll include links/photos of the auto loading mechanism, pwm and the lipo battery I'd like to use. Thanks!

    https://www.ebay.com/itm/Mini-Dc-Mo...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

    [​IMG]

    https://www.ebay.com/itm/Turnigy-Na...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

    [​IMG]
    https://www.amazon.com/XSW-Full-automatic-Modified-Stryfe-Versions/dp/B077PWZ3JX

    [​IMG]
     
  2. Audioguru

    Audioguru

    2,573
    581
    Sep 24, 2016
    The PWM controller says 5a which is not 5 Amps. It says it controls up to 90W which at 7.4V is 12.5A. It does not say the current rating of the resettable fuse.

    The kit is made to use two AA batteries producing 3V when new. The two cells Li-PO battery is 8.4V when fully charged and it will probably burn the PWM circuit, the motor, the thin wiring and the little switch.
     
  3. pstar

    pstar

    6
    0
    Feb 2, 2017
    I've confirmed others have run the kit on a 2s without issues. The motor will only be used in short bursts. I'm guessing on average 5 seconds per minute in 10 minute battle. Do you still think the pwm will fry? One more question. The ebay posting says I have to connect something on the pwm to work at low voltage. I don't see anything. Do you know what that may be?.. no reply from the ebay seller as of yet
     
  4. Audioguru

    Audioguru

    2,573
    581
    Sep 24, 2016
    It is cheap, Chinese and from ebay. Does anybody know anything about it??
     
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