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廈門泰尼電氣有限公司
主營(yíng)產(chǎn)品: AB模塊PLC |
會(huì)員1.png)
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廈門泰尼電氣有限公司
主營(yíng)產(chǎn)品: AB模塊PLC |
參考價(jià) | 面議 |
聯(lián)系方式:張亮查看聯(lián)系方式
更新時(shí)間:2018-04-16 09:53:57瀏覽次數(shù):242
聯(lián)系我們時(shí)請(qǐng)說明是泵閥商務(wù)網(wǎng)上看到的信息,謝謝!
2214-30SLOTT 2214-30SLOTT
2214-30SLOTT 2214-30SLOTT
正半周時(shí):電流由A點(diǎn)流出—>經(jīng)D1二極管—>C點(diǎn)—>經(jīng)R—>D點(diǎn)—>經(jīng)D4二極管—>流回B點(diǎn)。
負(fù)半周時(shí):電流由B點(diǎn)流出—>經(jīng)D3二極管—>C點(diǎn)—>經(jīng)R—>D點(diǎn)—>經(jīng)D2二極管—>流回A點(diǎn)
可見在交流電的正負(fù)半波里,交流電源的電流是正負(fù)二個(gè)方向交變的,而負(fù)載電阻R的電流,由于整流橋的作用,使流經(jīng)R的電流方向是不變的:總是由C點(diǎn)流向D點(diǎn),即R的電流變?yōu)橹绷麟姟5玆的電壓是不穩(wěn)定的,其波形是脈動(dòng),形狀與交流電正半周波形相似,見上右側(cè)圖中的未加電容的UCD波形圖。:張亮(工程師) 專線:
24小時(shí)移動(dòng)專線: 【】
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如果在負(fù)載R二端并接一濾波電容C1,就會(huì)使R電壓變得平穩(wěn),下面講解其濾波原理:在交流電過零瞬間起,R的電壓由0逐漸變大,此時(shí)由于C1并接在R二端,其電壓也由0增加,此過程為電容C1的充電過程,當(dāng)交流電壓達(dá)到zui大值后開始下降,將使R的電壓也由其zui大值開始下降,此時(shí)C1的電壓將高于R電壓,于是C1將開始向R放電,使R電壓下降速率變緩,見上右側(cè)圖下的臉色波形圖,此時(shí)R的電壓電壓波形比未加電容C1時(shí)的電壓波形變得平穩(wěn),而且C1值越大,R1電壓越平穩(wěn)。