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闁嬮棞(gu膩n)闆绘簮璁婂鍣ㄦ€庢ǎ瑷�(sh猫)瑷�(j矛)锛熼枊闂�(gu膩n)闆绘簮璁婂鍣ㄥ弮鏁�(sh霉)浠嬬垂

鏅�(sh铆)闁擄細2023-04-12 18:32:21渚�(l谩i)婧愶細21ic闆诲瓙缍�(w菐ng)

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銆€銆€閫欓噷纰哄畾鑺墖宸ヤ綔闋荤巼鐐� 70KHz锛岃姱鐗囩殑闋荤巼鍙互閫氶亷(gu貌)澶栭儴鐨� RC 渚�(l谩i)瑷�(sh猫)瀹�锛屽伐浣滈牷鐜囧氨绛変簬闁嬮棞(gu膩n)闋荤巼锛岄€欏€�(g猫)澶栬ō(sh猫)鐨勫姛鑳芥湁鍒╀簬鎴戝€戞洿濂界殑瑷�(sh猫)瑷�(j矛)闁嬮棞(gu膩n)闆绘簮锛屼篃鍙互閲囧彇澶栧悓姝ュ姛鑳�銆傝垏 UC384X 鍔熻兘鐩歌繎锛岃畩澹撳櫒纾佽姱鐐� EER28/28L锛屼竴鑸� AC2DC 鐨勮畩鎻涘櫒锛屽伐浣滈牷鐜囦笉瀹滆ō(sh猫)瓒呴亷(gu貌) 100kHz锛屼富瑕佹槸闁嬮棞(gu膩n)闆绘簮鐨勯牷鐜囬亷(gu貌)楂樹互鍚�锛屼笉鍒╀簬绯荤当(t菕ng)鐨勭┅(w臎n)瀹氭€�锛屾洿涓嶅埄浜� EMC 鐨勯€氶亷(gu貌)鎬�锛岄牷鐜囧お楂�锛岀浉鎳�(y墨ng)鐨� di/dt dv/dt 閮芥渻(hu矛)澧炲姞锛岄櫎 PI 132kHz 鐨勫伐浣滈牷鐜囦箣澶�锛屽ぇ瀹跺彲浠ュ鍙冭€冨叾瀹冨鐨勮姱鐗�锛屽氨鏈�(hu矛)绺界祼(ji茅)鑷繁鐨勭稉(j墨ng)椹�(y脿n)鍑轰締(l谩i)銆�

銆€銆€灏�(du矛)浜庣鑺殑閬告搰锛屾槸鍦ㄩ枊闂�(gu膩n)闋荤巼鍜屽姛鐜囩殑鍩虹(ch菙)锛屾洿澶氱殑鏄稉(j墨ng)椹�(y脿n)閬稿彇銆傜暥(d膩ng)鐒惰▓(j矛)绠楃殑瑭�锛屼綘闇€瑕佸緱鍒版洿澶氱殑纾佽姱鍙冩暩(sh霉)锛屽寘鎷鏉�锛屽眳閲屾韩搴�锛岄牷鐜囩壒鎬х瓑绛�锛岄€欏€�(g猫)鏄渶瑕佹參鎱㈠缓绔嬬殑銆�20W ~ 40W 鑼冨湇鍏�(n猫i) EE25 EER25 EER28 EFD25 EFD30 绛夊潎閮藉彲浠�銆�

銆€銆€瑷�(sh猫)瑷�(j矛)璁婂鍣ㄩ€�(j矛n)琛岃▓(j矛)绠椾笂闈㈣▓(j矛)绠椾簡璁婂鍣ㄧ殑闆绘劅閲�锛岀従(xi脿n)鍦ㄦ垜鍊戦倓闇€瑕佸緱鍒扮浉鎳�(y墨ng)鐨勫対鏁�(sh霉)鎵嶅彲浠ュ畬鎴愭暣鍊�(g猫)璁婂鍣ㄧ殑宸ヤ綔

銆€銆€1)瑷�(j矛)绠楀皫(d菐o)閫氭檪(sh铆)闁� Ton鍛ㄦ湡鏅�(sh铆)闁� T = Ton + Toff = 1/FswTon = T * DmaxFsw 锛� Dmax 閮芥槸宸茬煡閲� 70kHz 锛� 0.45 浠ｅ叆涓婂紡鍙緱Ton = 6.43us

銆€銆€2)瑷�(j矛)绠楄畩澹撳櫒鍒濈礆(j铆)鍖濇暩(sh霉)Np = Vin(min)*Ton/(螖B 脳 Ae) = 120Vdc * 6.43us/(0.2 * 82mm2) = 47 T(閫欓噷鐨勬暩(sh霉)鏄竴瀹氳鍙栨暣鐨�锛岃€屼笖鏄€�(j矛n)浣嶅彇鏁�锛屾垜鍊戣畩澹撳櫒涓嶅彲鑳藉彧绻炲崐鍦堟垨鍏跺畠闈炴暣鏁�(sh霉)鍦�)

銆€銆€3)瑷�(j矛)绠楄畩澹撳櫒 12V 涓昏几鍑虹殑鍖濇暩(sh霉)杓稿嚭闆诲(Vo)锛�

銆€銆€12 Vdc鏁存祦绠″闄�(Vd)锛� 0.7

銆€銆€Vdc绻炵祫澹撻檷(Vs)锛� 0.5

銆€銆€Vdc鍘熼倞鍖濅紡姣�(K) = Vi_min / Np= 120 Vdc / 47 T = 2.55杓稿嚭鍖濇暩(sh霉)(Ns) = (杓稿嚭闆诲(Vo) + 鏁存祦绠″闄�(Vd) + 绻炵祫澹撻檷(Vs)) / 鍘熼倞鍖濅紡姣�(K)= (12 Vdc + 0.7Vdc + 0.5Vdc) / 2.55 = 6 T (宸插彇鏁�)

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