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Re: [請問] 電池電壓and電流問題
Oct 3rd 2013, 22:49, by FTSYSTAR

作者FTSYSTAR (豚鼠)

看板ask

標題Re: [請問] 電池電壓and電流問題

時間Thu Oct 3 22:49:28 2013

※ 引述《FTSYSTAR (豚鼠)》之銘言: 我想把一個需要裝八顆 AA電池(串聯)的馬達(RC-280SA 2865) Mabuchi motor 改成可以接插頭 那麼我需要多少伏特and多少安培的變壓器呢? -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 121.254.64.219

QQ101:你去弄個電腦的power 24PIN 裡面綠色PIN跟黑色短路就開了 10/01 23:59

QQ101:再把hdd+12V接過來用 10/01 23:59

FTSYSTAR:手邊剛好有一顆power @@ 10/02 00:24

Schottky:這樣也不錯,那就再找根迴紋針吧 10/02 00:26

FTSYSTAR:hdd +12v是四孔那個嗎? 我的正負極要怎麼接? 10/02 00:26

FTSYSTAR:迴紋針插好了! 10/02 00:26

Schottky:四孔插頭黃色是12V黑色是GND紅色是5V, 黃接正黑接負 10/02 00:29

Schottky:迴紋針插上之後PSU風扇有開始轉就代表有開始供電了 10/02 00:29

FTSYSTAR:成功! 太感謝了! 10/02 00:50

後來發現接Power 12V(黑/黃)會有跳電問題, 5V(紅/黑)則可以穩定運轉不會跳電 Power上寫5V 25A(是應該是代表電流上限吧?) 12V 13A (是應該是代表電流上限吧?) 那麼我要選用12V ,上限多少功率或多少安培的變壓器才不會跳電呢? -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 121.254.64.219

Schottky:跳電是你的power壞了吧... 雖說只有一個大4Pin本來也不可 10/03 22:52

Schottky:能供電到13A... 10/03 22:53

Schottky:AA電池只能供電到1A上下,超過0.7A就會開始發熱 10/03 22:55

FTSYSTAR:我想13A應該是指所有單元串接起來吧 10/03 22:55

Schottky:所以我上次說 12V 1A 的 DC 變壓器就夠了 10/03 22:56

FTSYSTAR:但是我光接一個馬達就超過了 10/03 22:56

FTSYSTAR:可見馬達的電阻很低 10/03 22:56

Schottky:我還是認為跳電的原因是power老舊損壞... 10/03 22:56

Schottky:不然你可以用電表的電流檔量量看 10/03 22:57

FTSYSTAR:另外是我接筆電的變壓器 19V 3.7A變壓器同樣會跳電 10/03 22:58

FTSYSTAR:我已我才會想說我買12V 1A大概也是會跳電 10/03 22:58

FTSYSTAR:電表的電流黨我一直測量到浮動的數值 弄不太懂 10/03 23:01

FTSYSTAR:(@@" sorry我不是相關科系的) 10/03 23:02

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