PWM闆绘椹�(q奴)鍕曠郴绲�(t菕ng)鍌冲皫(d菐o)骞叉摼姗熺悊鍒嗘瀽
鏅傞枔锛�2009-08-26 09:12:13渚嗘簮锛歽angliu
灏�(d菐o)瑾烇細?閲濆皪瀵﹂殯绯荤当(t菕ng)灏囬浕姗熺郴绲�(t菕ng)鐨勪氦娴侀浕婧�銆佹暣娴佺挵(hu谩n)绡€(ji茅)銆侀€嗚畩鐠�(hu谩n)绡€(ji茅)銆侀浕姗熶綔鐐烘暣楂旈€茶鍒嗘瀽锛岀偤浜嗗垎鏋愭柟渚垮皣鍌冲皫(d菐o)骞叉摼鍒嗙偤鍏辨ā骞叉摼鍜屽樊妯″共鎿鹃€茶鐮旂┒
鎽� 瑕�锛氶嚌灏嶅闅涚郴绲�(t菕ng)灏囬浕姗熺郴绲�(t菕ng)鐨勪氦娴侀浕婧愩€佹暣娴佺挵(hu谩n)绡€(ji茅)銆侀€嗚畩鐠�(hu谩n)绡€(ji茅)銆侀浕姗熶綔鐐烘暣楂旈€茶鍒嗘瀽锛岀偤浜嗗垎鏋愭柟渚垮皣鍌冲皫(d菐o)骞叉摼鍒嗙偤鍏辨ā骞叉摼鍜屽樊妯″共鎿鹃€茶鐮旂┒锛屽垎鏋愪簡PWM闆绘椹�(q奴)鍕曠郴绲�(t菕ng)涓瓨鍦ㄧ殑涓昏鍏辨ā鍜屽樊妯″共鎿鹃€氶亾锛岀敱浜庡偝灏�(d菐o)骞叉摼鐨勮矾寰戝拰涓婁笅姗嬭噦 IGBT鐨勯枊閫氬拰闂�(gu膩n)鏂锋湁寰堝ぇ闂�(gu膩n)绯�锛屽洜姝ゅ垎鏋愪簡 IGBT涓嶅悓鐨勯枊闂�(gu膩n)鐙€鎱�(t脿i)涓嬬殑鍏辨ā骞叉摼鍜屽樊妯″共鎿剧殑鍌虫挱璺緫锛屼笁绋笉鍚岀殑浠跨湡绲�(ji茅)鏋滃緱鍑轰竴鑷寸殑绲�(ji茅)璜栬鏄庢湰鏂囨鐞嗗垎鏋愮殑姝g⒑鎬�銆�
闂�(gu膩n)閸佃锛歅WM闆绘椹�(q奴)鍕曪紝鍌冲皫(d菐o)骞叉摼锛屾鐞嗗垎鏋�
1锛庡紩瑷€
鐢变簬PWM鎶€琛�(sh霉)鎳�(y墨ng)鐢ㄤ簬闆绘椹�(q奴)鍕曠郴绲�(t菕ng)涓紝鍔熺巼璁婃彌鍣ㄩ噰鐢∕OSFET銆両GBT銆佸彲闂�(gu膩n)鏂锋櫠闁樼绛夐枊闂�(gu膩n)鍣ㄤ欢銆傜偤浜嗗緱鍒版洿濂界殑闆绘绯荤当(t菕ng)鎺у埗鎬ц兘鎸囨锛岄枊闂�(gu膩n)鍣ㄤ欢鐨勫伐浣滈牷鐜囧氨瓒婁締瓒婇珮锛屽湪闁嬮棞(gu膩n)鍜岄棞(gu膩n)鏂风殑鐬枔鐢�(ch菐n)鐢熷緢澶х殑闆诲鍜岄浕娴佽畩鍖栫巼锛岄€欏氨鏄挤闆荤骞叉摼锛圗MI锛夌敘(ch菐n)鐢熺殑鍘熷洜锛岄仩閬犺秴鍑轰簡鐝�(xi脿n)鍦ㄩ浕纾佸吋瀹规婧栬(gu墨)瀹氱殑鍏佽ū鍊�銆傜敘(ch菐n)鐢熺殑闆荤骞叉摼涓昏鏄互鍌冲皫(d菐o)鐨勫舰寮忛€茶鍌虫挱鐨�锛屾鐞嗗垎鏋愭槸鏁�(sh霉)瀛告ā鍨嬪缓绔嬬殑鍩虹(ch菙)锛屽洜姝ゆ鐞嗗垎鏋愬皪浜嶱WM闆绘椹�(q奴)鍕曠郴绲�(t菕ng)鍌冲皫(d菐o)骞叉摼鐨勭爺绌跺叿鏈夐噸瑕佹剰缇�銆�
鍦嬪収(n猫i)澶栨湁寰堝鏂囩嵒鍦ㄩ€欐柟闈㈠仛浜嗕竴瀹氱殑鐮旂┒锛屾枃鐛籟1]閲濆皪IGBT鐨勯珮du/dt绲﹂浕鍔涢浕瀛愯缃付渚嗙殑鍤撮噸鍏辨ā闆荤骞叉摼鍟忛,娣卞叆鍒嗘瀽浜咮uck闆昏矾鐨勫叡妯″共鎿俱€傛枃鐛籟2]浠ラ浕璺悊璜栫偤鍩虹(ch菙)锛屽缓绔嬩簡鍠姝f縺寮忚畩鎻涘櫒涓�锛岀敱鍔熺巼MOSFET鐨勬紡妤佃垏鎺ュ湴鏁g啽鍣ㄤ箣闁撳瘎鐢熼浕瀹规墍褰㈡垚鐨勮几鍏ョ鍏辨ā骞叉摼鍒嗘瀽妯″瀷銆傞€欓噷灏变笉涓€涓€浠嬬垂浜嗭紝鏈枃鐨勬鐞嗗垎鏋愬皣闆绘椹�(q奴)鍕曠郴绲�(t菕ng)浣滅偤涓€鍊嬫暣楂斾締鐮旂┒锛岄€欏湪鏂囩嵒涓緢灏戠櫦(f膩)鐝�(xi脿n)銆�
PWM闆绘椹�(q奴)鍕曠郴绲�(t菕ng)鍌冲皫(d菐o)骞叉摼姗熺悊鍒嗘瀽鍏ㄦ枃涓嬭級