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ESC 電容

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1#
anthony_wg 發表於 2013-5-9 10:52:37 | 顯示全部樓層
用在 RC 上, 簡單說電解電容低內阻 (ESR) 就是好. 並聯主要原因在於減低內阻, 細 SIZES, 加大容值.
要低內阻的電解電容不妨考慮電腦底板銀色筒仔那些, 用在 DIGITAL 噪源線路上應要有這考慮.

如果自組, 不妨用這些電容牌子: NICHICON, ELNA, RUBYCON, SANYO. 電壓最好選 16 或 25V.
SANYO OSCON 糸列算是最低內阻的一群, 但因含有山埃, 聽聞已停產, 市場數量亦不多, 亦被炒貴了.
2#
anthony_wg 發表於 2013-5-9 18:09:58 | 顯示全部樓層
3#
anthony_wg 發表於 2013-5-10 00:57:08 | 顯示全部樓層
kelvinayhh 發表於 2013-5-9 23:56
如果我用4粒10v 2200uF,會唔會谷爆reventon pro

不會這樣. 電容作用在於儲 CHARGE, 有負載才會放電.


4#
anthony_wg 發表於 2013-5-10 14:39:14 | 顯示全部樓層
tsfai 發表於 2013-5-10 11:18
Ching, how many uF  is good enough for 1:10 RC?

Actually it depends on the load and the battery condition. The point is how to sustain the supply voltage level for the ESC for the instant voltage drop while at full load. Although I didn't have a low turn motor and haven't gone to measure how much voltage drop (battery cannot sustain) during the turbo turned ON, I believe a several thousands uF has to be enough for our RC car, e.g. 1000uF x4, 2200uF x4 (my motor is 10.5T with turbo).

We can use a high capacitance capacitor there for sure that will not have problems on the electronics, except for the size we always consider for our tiny RC car space. If I have four 2200uF with a reasonable size and low ESR, I will have no more considerations.













5#
anthony_wg 發表於 2013-5-14 17:15:32 | 顯示全部樓層
seasky 發表於 2013-5-14 16:39
晶體管, fet 個結構簡單講就係將信號放大, 但都有分反應速度, 電流.
咁 cap 有無分反應速度, 電流架? ...

電容本身是被動的零件, MOSFET 是主動零件. 類型不同.


6#
anthony_wg 發表於 2013-5-18 02:57:45 | 顯示全部樓層
Chungyin3610 發表於 2013-5-17 11:12
我本身用開sp 120a pro..本身個隻都係25v..2200uf.我係鴨記買2 蚊一粒

溫馨提示: 記住用熱縮管等包住電容和接點, 一是防止接點被短路, 二是不慎電池正負反轉了電容爆的時候會被彈出來的東西彈傷眼睛.
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