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<P> 10.10.2006, 18:58:10</P>
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<P>Dobry den</P>
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<P>ktery T shori ? vzdy ten stejny nebo pokazde jiny ? Obrazek by nebyl, z vaseho popisu nejsem zrovna moudry.</P>
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<P>S pozdravem Pavel</P>
<P> <A class=RVTS6 href="mailto:gatilo@centrum.cz">mailto:gatilo@centrum.cz</A></P>
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<P>--</P>
<P>Venca Smidl napsal:</P>
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<P><SPAN class=RVTS8>Zdravim,</SPAN></P>
<P><SPAN class=RVTS8> zapojil jsem si H-mustek pro ovladani bldc motoru (na univerzalni desce). Tedy 3 vetve po 2 tranzistorech (N-mosfet). "Silove"-spinane napeti je 9V, tranzistory otviram 10V na gate, o buzeni se staraji budice TC4421. Horni tranzistory jsou ovladany pwm, dolni mohou byt jen sepnuty nebo rozepnuty.</SPAN></P>
<P><SPAN class=RVTS8> Pokud ridici program sepne prislusnou dvojici Ta nic vic nedela, vse funguje v poradku - je mozne merit max. proud kolem 10A, s mnenici se stridou PWM proud prislusne klesa (T se zacnou zahrivat,ale to bude normalni). OVSEM v okamziku, kdy zacnu periodicky prepinat mezi dvemi dvojicemi tranzistoru, okamzite se jeden z tranzistoru zahreje a "shori". Pripada mi, jako by se T rozkmitaly.</SPAN></P>
<P><SPAN class=RVTS8> Chci se tedy zeptat, v cem muze byt problem? Zda je to bezna chyba z duvodu, ze jsem neco opomel (nejake "specialni" blokovaci kondenzatory, nejake netypicke programove rizerni, nejaka konstrukcni zalezitost........)? Jak to zapojit/ridit aby to chodilo:))?</SPAN></P>
<P><SPAN class=RVTS9> </SPAN></P>
<P><SPAN class=RVTS8>predem dekuji</SPAN></P>
<P><SPAN class=RVTS8>Smidl</SPAN></P>
<P><SPAN class=RVTS8> </SPAN></P>
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