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<p>　　<strong><a href="http://www.chenfeipower.com/product/product-0001,0015.shtml">高频å˜åŽ‹å™?/a></strong>是ç»è¿‡å¤šé“å·¥åºåˆ¶ä½œè€Œæˆçš?但是由于它应用的都是一些比较é‡è¦çš„地方,若是出现的问é¢?é€ æˆçš„åŽæžœé€šå¸¸éƒ½æ˜¯éžå¸¸ä¸¥é‡çš?å› æ¤,高频å˜åŽ‹å™¨åœ¨åˆ¶ä½œå®Œæˆä¹‹åŽ,需è¦å¯¹å…¶è¿›è¡Œæ£€æµ?下é¢æ˜¯é«˜é¢‘å˜åŽ‹å™¨æµ‹è¯•æ‰€éœ€å…·å¤‡çš„æ¡ä»¶ï¼š</p>
<p>　　一ã€ç”µé˜»æ³•åˆ™æµ‹é‡çº¿åœˆçš„å¹³å‡æ¸©å‡</p>
<p>　　电阻法测é‡çº¿åœˆå¹³å‡æ¸©å‡çš„原ç†æ˜¯åˆ©ç”¨å¯¼çº¿ç”µé˜»éšæ¸©åº¦æˆæ£æ¯”å¢žåŠ çš„æ€§è´¨ã€?/p>
<p>　　电阻法测é‡çº¿åœˆå¹³å‡æ¸©å‡çš„æ¥éª¤å¦‚下ï¼?/p>
<p>　　一.冷阻测é‡</p>
<p>　　测é‡åœ¨çŽ¯å¢ƒæ¸©åº¦ä¸ºt1时的冷阻r1。测é‡æ—¶ï¼Œåº”在温度比较稳定的环境下进行（例如置入ä¸é€šç”µçš„烘箱内，温度就ä¸æ˜“å—周围环境温度å˜åŒ–çš„å½±å“）。æ¤æ—¶ï¼Œæ¯éš”一定时间（如åŠå°æ—¶ï¼‰æµ‹ä¸€æ¬¡å†·é˜»ï¼Œè‡³ç”µé˜»å……分稳定åŽè¯»æ•°ã€?/p>
<p>　　äº?è´Ÿè·:è´Ÿè·æŒ?0.6.1节è¦æ±‚进行ã€?/p>
<p>　　ä¸?æ–电测é‡</p>
<p>　　当å˜åŽ‹å™¨è´Ÿè·åˆ°è§„定时间åŽï¼Œå…ˆæµ‹é‡å˜åŽ‹å™¨å„绕组的负载电压，然åŽæ–电测é‡ç›´æµç”µé˜»ã€‚测é‡åº”在环境温度比较稳定时进行，æ–电åŽç«‹å³ç”¨ç”µæ¡¥æµ‹é‡çº¿åœˆçš„çƒé˜»r2，或尽快测得4~5点çƒé˜»ï¼Œå¹¶è®°å½•ä»Žæ–电到数æ®æ—¶é—´ï¼Œç„¶åŽç”¨å¤–推法求出æ–电瞬间的çƒé˜»r2ã€?/p>
<p>　　å›?计算:计算线圈平å‡æ¸©å‡</p>
<p>　　äº?注æ„事项</p>
<p>　　1．试验环境。被试å˜åŽ‹å™¨çš„åº”ç”¨èžºæ “æž¶ç©?0mm，测é‡çŽ¯å¢ƒæ¸©åº¦çš„温度计应放在è·çº¿åœˆè¡¨é?00mm~300mmå¤„ï¼Œè¯•æ ·åº”é¿å…直接å—到风å¹ä»¥åŠå…¶ä»–å‘çƒä½“如ç«ç‚‰ã€æš–æ°”ã€è´Ÿè½½ç”µé˜»ç‰çš„çƒè¾å°„ã€?/p>
<p>　　2ï¼?所使用的电阻电桥应有足够的çµæ•åº¦ï¼Œå½“å˜åŽ‹å™¨çº¿åœˆç”µé˜»å°äºŽ1欧时，应采用凯尔文电桥。åŒæ—¶ï¼Œæµ‹é‡ç”µé˜»æ—¶çš„å¼•çº¿ç”µé˜»ä¸Žè¯•æ ·å†·é˜»ç›¸æ¯”åº”ä¸å¤§äº?%ã€?/p>
<p>　　3．当被试å˜åŽ‹å™¨æœ‰å‡ 个绕组时，应测é‡çº¿åœˆå†…部绕组的温å‡ï¼Œä¹Ÿå°±æ˜¯è¯´ï¼Œåº”在接近线圈1/3厚度处的绕组上测é‡ï¼Œå› 为这一绕组的平å‡æ¸©å‡æœ€é«˜ã€?/p>
<p>　　4．当ä¸ç”¨å¤–推法时，çƒé˜»æµ‹é‡åº”åœ?0så·¦å³å®Œæˆã€‚æ¤å¤–，t2与t1之温差最好ä¸è¦è¶…è¿?℃ã€?/p>
<p>　　5ï¼?å˜åŽ‹å™¨æ¸©å‡è¾¾åˆ°ç¨³å®šæ‰€éœ€çš„时间与å˜åŽ‹å™¨è´¨é‡æœ‰å…³ã€‚一般认为在ç»è¿‡4~5T的时间åŽå˜åŽ‹å™¨æ¸©å‡å³è¾¾ç¨³å®šã€‚å…¶ä¸T为å˜åŽ‹å™¨å‘çƒåŠå†·å´æ—¶é—´å¸¸æ•°ã€?/p>
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