Controlling a RS-360SH Motor Using a H-Bridge

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dear all,

i trying control montor using arduino , h bridge. problem face h bridge gets hot , think not safe operate under such condition. pretty sure doing things wrong, due lack of experience, glad if provide feedback/advice on setup. make things easier, provide sketch of circuit , technical data of components used.

components used:
i use external power supply delivers 12v dc 1.4a. h bridge l293d texas instruments [1]. motor use rs360-sh [2]


sketch of setup:
the sketch attached post shows motor m connected left part of l293d. power supply used power l293d, motor (via l293d) , arduino. dp1 , dp2 digital pins set fix value. seems work ok. motor runs in 1 or direction.

my questions:
  • is possible heat comes voltage applied pin 16 of l293d (vcc_1). have seen in datasheet, recommended voltage pin 16 should within range of 4.5 - 7 v. in case, 12 v applied. need use voltage regulator in case? better apply voltage of 5v or 7v circuit? applying higher voltage means more current, means more heat? correct?
  • i think l293d underdimensioned motor. data sheet mentions max. current of 600ma per channel, motor draws 2.2 - 4.7a. factor, makes l293 hot? if yes, recommend better h bridge motor? avoid buying full motor shield, because of costs. if possible use h bridge.


as side note: motor not running constantly. use pump water. takes perhaps 5-10 seconds, once day.

thank help. appreciate help. if need more information, please let me know.

best regards,
andré



external links:
[1] http://www.ti.com/lit/ds/symlink/l293d.pdf
[2] http://www.ebay.com/itm/271144623729?_trksid=p2060778.m2749.l2649&sspagename=strk%3amebidx%3ait

vss logic supply voltage , should same arduino, 5v, if connected
to arduino operating @ 5v.  should guarantee reliable recognition of incoming
logic signals.

the heat generated in device either output driver losses (they very
lossy), or due operating device motor attached, vss (pin 16) powered
but vs (pin 8) unpowered.  should never done causes internal protection
components take power logic supply direct motor.

this h-bridge chip rated maximum of 0.6a, , peak pulses _below_ 1.2a - if your
motor takes 1.2a or more over-driving chip , may damage it, if you
only take 0.6a overheat if not cooled.

you should find out stall current rating of motor(s).


Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > Controlling a RS-360SH Motor Using a H-Bridge


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