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高频å˜åŽ‹å™¨é€‰åž‹æ³¨æ„事项</h3>
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<span>æ–‡ç« å‡ºå¤„ï¼?a href=""><a href="http://cfdz.nsw888.com">深圳市晨飞电å有é™å…¬å?/a></a></span><span>网责任编辑：<a href="http://cfdz.nsw888.com">NSW</a></span><span>作者：<a href="http://cfdz.nsw888.com">NSW</a></span><span>人气ï¼?span
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<p>　　<strong>高频å˜åŽ‹å™?/strong>是现今许多机械设备上的é‡è¦éƒ¨ä»?所以ä¸ä½†åœ¨æ—¥å¸¸çš„使用è¦éžå¸¸æ³¨æ„,在选è´çš„时候也è¦æ ¼å¤–å°å¿?è¦æ ¹æ®è‡ªå·±çš„需求æ¥é€‰æ‹©åˆé€‚çš„å˜åŽ‹å™?在å˜åŽ‹å™¨é€‰åž‹çš„时候需注æ„çš„å‡ ç‚¹äº‹é¡¹å¦‚ä¸?</p>
<p>　　1.选择过高电压ç‰çº§çš„弊ç«?br />
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　　选择过高的电压ç‰çº§é€ æˆæŠ•èµ„过高，回收期长。电压ç‰çº§çš„æ高，电机的ç»ç¼˜å¿…é¡»æé«˜ï¼Œä½¿ç”µæœºä»·æ ¼å¢žåŠ ã€‚ç”µåŽ‹ç‰çº§çš„æ高，使å˜é¢‘器ä¸ç”µåŠ›åŠå¯¼ä½“器件的串è”æ•°é‡åŠ 大，æˆæœ¬ä¸Šå‡ã€‚å¯è§ï¼Œå¯¹äºŽ200ï½?000kW的电机系统采ç”?kVã€?0kV电压ç‰çº§æ˜¯æžä¸ç»æµŽã€å¾ˆä¸åˆç†çš„ã€?br />
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　　2.å˜é¢‘器容é‡ä¸Žæ•´æµè£…置相数关系<br />
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　　å˜é¢‘器装置投å…?kV电网必须符åˆå›½å®¶æœ‰å…³è°æ³¢æŠ‘制的规定。这和电网容é‡å’Œè£…置的é¢å®šåŠŸçŽ‡æœ‰å…³ã€‚çŸè·¯å®¹é‡åœ¨1000MVA以装相（å˜åŽ‹å™¨å‰¯è¾¹åŒç»•ç»„）å³å¯ï¼Œå¦‚æžœ24相功率就å¯è¾¾2000kWï¼?2相基本上消除了幅值较大的5次和7次è°æ³¢ã€‚æ•´æµç›¸æ•°è¶…è¿?6相åŽï¼Œè°æ³¢ç”µæµå¹…值é™ä½Žä¸æ˜¾è‘—ï¼Œè€Œåˆ¶é€ æˆæœ¬è¿‡é«˜ã€‚如果电网çŸè·¯å®¹é‡?000MVA，则装置容许容é‡æ›´å¤§ã€?br />
　　 <br />
　　3.把最高电压é™åˆ?kV以下å¯èŠ‚约大é‡æŠ•èµ?br />
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　　从电力电å器件特性åŠå®‰å…¨ç³»æ•°è€ƒè™‘电压ç‰çº§çš„å¿…è¦æ€§ï¼Œå—电力电å器件电压åŠç”µæœºå…许的dv/dté™åˆ¶ï¼?kVå˜é¢‘器必须采用多电平或多器件串è”ï¼Œé€ æˆçº¿è·¯å¤æ‚ï¼Œä»·æ ¼æ˜‚è´µï¼Œå¯é 性差ã€?/p>
<p>　　4.隔离å˜åŽ‹å™¨é—®é¢?br />
　　 <br />
　　为了隔离ã€æ”¹å–„输入电æµåŠå‡å°è°æ³¢ï¼ŒçŽ°åœ¨æ‰€æœ‰çš„ä¸åŽ‹"直接å˜é¢‘"器都ä¸æ˜¯çœŸæ£çš„直接å˜é¢‘，其输入侧都装有输入å˜åŽ‹å™¨ï¼Œè¿™ç§é…ç½®çŸæ—¶é—´å†…ä¸ä¼šæ”¹å˜ã€‚既然输入侧有å˜åŽ‹å™¨ï¼Œå˜é¢‘器和电机的电压就没有必è¦å’Œç”µç½‘ä¸€æ ·ï¼Œéžç”¨10kVå’?kVä¸å¯ï¼ŒåŠŸçŽ?500kW以下电压å¯ä»¥ä¸è¶…è¿?kVï¼Œå› æ¤å°±æœ‰äº†å˜é¢‘器和电机的åˆç†ç”µåŽ‹ç‰çº§é—®é¢˜ã€?br />
　　 <br />
　　200kWï½?00kW以下的å˜é¢‘调速宜选用380Væˆ?60V电压ç‰çº§ã€‚它线路简å•ï¼ŒæŠ€æœ¯æˆç†Ÿï¼Œå¯é 性高ï¼?dv/dtå°ï¼Œä»·æ ¼ä¾¿å®œã€‚ä»ä»?60kW电机为例ï¼?30kW660V的低压å˜é¢‘器çº?5万，而åŒå®¹é‡6000Vä¸åŽ‹å˜é¢‘器约90万。实现的方法有低- 低，ä½?高，é«?低和é«?ä½?高ç‰å‡ ç§å½¢å¼ã€‚由于电机，å˜åŽ‹å™¨çš„ä»·æ ¼è¿œä½ŽäºŽå˜é¢‘器，å³ä½¿æ›´æ¢ç”µæœºã€å˜åŽ‹å™¨ä¹Ÿåˆç†ã€?/p>
<p>　　5.原有6kV高压电机如何ä¸?.5kVå˜é¢‘器电压é…å¥?br />
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ã€€ã€€åˆ¶é€ åŽ‚åŽŸæœ‰6kV电机一般å‡ä¸ºæ˜Ÿå½¢æŽ¥çº¿ï¼Œå…¶ç›¸ç»•ç»„承å—实际电压ä¸?468V，故åªè¦å°†ç»•ç»„改接æˆä¸‰è§’形其它ä¸å˜ã€?/p>
<p>　　6.对电网è°æ³¢æ±¡æŸ“的防治措施<br />
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　　从实用角度整æµæ¡¥ç»„æˆ12相整æµå¯æ¶ˆé™¤5ã€?次è°æ³¢å·²åŸºæœ¬æ»¡è¶³ç”µç½‘è°æ³¢è¦æ±‚ã€‚å› æ?00kWï½?00kW采用12相整æµå³å¯ï¼Œ1000kWï½?500kW采用24相也å¯ä»¥ç¬¦åˆè¦æ±‚ã€?br />
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