請(qǐng)問大俠電源帶載56歐,24V輸出只14v,空載正常, 原因?
輸入:90--270v 輸出24v6a 8v1a ,反激開關(guān)電源芯片Vcc 13.7v mos管導(dǎo)通時(shí)間很短,請(qǐng)問問題在哪里?
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輸入:AC 90~270V
輸出:24V 6A; 8v 1A
高頻變壓器設(shè)計(jì)參數(shù)
EI40:
Primary inductivity 115 μH
Lowest SMPS- frequency 56.8 kHz / 17.6 μs
Sec. voltage per turn 4.17 V
Windg. n / I/A Ieff/wires min/Umax/V Uact/V
Prim. 24 / 1.69 3.07 / 4
IC-supply 4 15.99
U 1 6 / 6 9.52 / 10 23.8 / 24.2 24.04
U 2 2 / 1 1.59 / 2 7.9 / 8.1 7.35
Output voltages incl. 1 V voltage drop at sec. diodes
Current density 4 A/mm2
輸出:24V 6A; 8v 1A
高頻變壓器設(shè)計(jì)參數(shù)
EI40:
Primary inductivity 115 μH
Lowest SMPS- frequency 56.8 kHz / 17.6 μs
Sec. voltage per turn 4.17 V
Windg. n / I/A Ieff/wires min/Umax/V Uact/V
Prim. 24 / 1.69 3.07 / 4
IC-supply 4 15.99
U 1 6 / 6 9.52 / 10 23.8 / 24.2 24.04
U 2 2 / 1 1.59 / 2 7.9 / 8.1 7.35
Output voltages incl. 1 V voltage drop at sec. diodes
Current density 4 A/mm2
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@hjp21cn
輸入:AC90~270V輸出:24V6A;8v1A高頻變壓器設(shè)計(jì)參數(shù)EI40:Primaryinductivity 115μHLowestSMPS-frequency 56.8kHz/17.6μsSec.voltageperturn 4.17VWindg. n/I/A Ieff/wires min/Umax/V Uact/VPrim. 24/1.69 3.07/4IC-supply 4 15.99U1 6/6 9.52/10 23.8/24.2 24.04U2 2/1 1.59/2 7.9/8.1 7.35Outputvoltagesincl.1Vvoltagedropatsec.diodesCurrentdensity 4A/mm2
115uH???
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@lifeng99141
100W左右的東西,電感量好像小了點(diǎn),多高頻率啊?
我一重繞了變壓器
高頻變壓器設(shè)計(jì)參數(shù)
EI40:
Primary inductivity 195 μH
Lowest SMPS- frequency 33.9 kHz / 29.5 μs
Sec. voltage per turn 3.14 V
Windg. n / I/A Ieff/wires min/Umax/V Uact/V
Prim. 32 / 1.69 3.07 / 4
IC-supply 5 15.99
U 1 8 / 6 9.52 / 10 23.8 / 24.2 24.04
U 2 3 / 1 1.59 / 2 7.9 / 8.1 7.35
Output voltages incl. 1 V voltage drop at sec. diodes
Current density 4 A/mm2
但現(xiàn)在24V6A輸出的整流二極管壞了,用的是兩個(gè)MUR460并聯(lián),要用什么二極管或并多大R、C?
高頻變壓器設(shè)計(jì)參數(shù)
EI40:
Primary inductivity 195 μH
Lowest SMPS- frequency 33.9 kHz / 29.5 μs
Sec. voltage per turn 3.14 V
Windg. n / I/A Ieff/wires min/Umax/V Uact/V
Prim. 32 / 1.69 3.07 / 4
IC-supply 5 15.99
U 1 8 / 6 9.52 / 10 23.8 / 24.2 24.04
U 2 3 / 1 1.59 / 2 7.9 / 8.1 7.35
Output voltages incl. 1 V voltage drop at sec. diodes
Current density 4 A/mm2
但現(xiàn)在24V6A輸出的整流二極管壞了,用的是兩個(gè)MUR460并聯(lián),要用什么二極管或并多大R、C?
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@hjp21cn
我一重繞了變壓器高頻變壓器設(shè)計(jì)參數(shù)EI40:Primaryinductivity 195μHLowestSMPS-frequency 33.9kHz/29.5μsSec.voltageperturn 3.14VWindg. n/I/A Ieff/wires min/Umax/V Uact/VPrim. 32/1.69 3.07/4IC-supply 5 15.99U1 8/6 9.52/10 23.8/24.2 24.04U2 3/1 1.59/2 7.9/8.1 7.35Outputvoltagesincl.1Vvoltagedropatsec.diodesCurrentdensity 4A/mm2但現(xiàn)在24V6A輸出的整流二極管壞了,用的是兩個(gè)MUR460并聯(lián),要用什么二極管或并多大R、C?
我的QQ:380947364,聯(lián)系下,做個(gè)朋友.
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@hjp21cn
我一重繞了變壓器高頻變壓器設(shè)計(jì)參數(shù)EI40:Primaryinductivity 195μHLowestSMPS-frequency 33.9kHz/29.5μsSec.voltageperturn 3.14VWindg. n/I/A Ieff/wires min/Umax/V Uact/VPrim. 32/1.69 3.07/4IC-supply 5 15.99U1 8/6 9.52/10 23.8/24.2 24.04U2 3/1 1.59/2 7.9/8.1 7.35Outputvoltagesincl.1Vvoltagedropatsec.diodesCurrentdensity 4A/mm2但現(xiàn)在24V6A輸出的整流二極管壞了,用的是兩個(gè)MUR460并聯(lián),要用什么二極管或并多大R、C?
二個(gè)才8A,太小了,要用20A的管子,耐壓有100V就行了
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@hjp21cn
請(qǐng)問有什么問題?
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他是說這樣接會(huì)好一點(diǎn)
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@李紹波
[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/42/1149579410.gif');}"onmousewheel="returnimgzoom(this);">他是說這樣接會(huì)好一點(diǎn)
你看出電路有什么問題嗎?變壓器參數(shù)對(duì)嗎?
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