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      中頻電爐,中頻電源,中頻設備和配件及維修
      中頻電源,中頻電爐,感應加熱設備,電爐維修專業廠家-保定興盛中頻設備有限公司
      河北保定興盛中頻設備有限公司
      電話:0312-7966818
      傳真:0312-7968665
      手機:13503128018
      郵箱:bdxsd@163.com
      聯系人:高先生
      地址:保定清苑工業區金線河堤南,保清公路保滄高速橋北,興盛路東行300米興盛路9號
      中頻電爐常見故障及處理
      [來源:www.www.xhashow.com] [作者:aywl] [日期:17-07-07]
      1、開機,設備不能正常起動 1. Starting up, the equipment can't start properly 故障現象:起動時直流電流大,直流電壓和中頻電壓低,設備聲音沉悶。 Fault phenomenon: the dc current is large when starting, the dc voltage and the intermediate frequency are low, and the equipment is dull. 分析處理:逆變橋有一橋臂的晶閘管可能短路或開路,造成逆變橋三臂橋運行。用示波器分別觀察逆變橋的四個橋臂上的晶閘管管壓降波形,若有一橋臂上的晶閘管的管壓降波形為一線,該晶閘管已穿通;若為正弦波,該晶閘管未導通。更換已穿晶閘管;查找晶閘管未導通的原因。 Analytical processing: a bridge with a bridge arm can short-circuit or open, causing the reverse bridge to operate. The waveform of the thyristor on the four bridge arm of the inverter bridge is observed with the oscilloscope, and the thyristor has been perforated if the tube pressure drop of the thyristor on a bridge arm is the first line. If it is a sine wave, the thyristor does not. Replace the worn thyristor; Find out why the thyristor is unconnected. 2、設備能起動,但工作狀態不對 2. The equipment can start, but the working condition is not correct 故障現象:設備能正常順利起動,當功率升到某一值時,過壓或過流保護。 Failure phenomenon: the equipment can start smoothly, and when the power reaches a certain value, overpressure or overcurrent protection. 分析處理:分兩步查找故障原因: Analysis and processing: two steps for troubleshooting: 1)、先將設備空載運行,觀察電壓能否升到額定值。若電壓不能升到額定值,并且多次在電壓某一值附近過流保護。這可能是補償電容或晶閘管壓不夠造成的,但也不排除是電路某部分打火造成的; 1) first, the equipment is empty, and the voltage can be raised to the rating. If the voltage cannot be raised to the rating, it will be protected at a voltage value several times. This may be caused by insufficient pressure on the capacitance or thyristor, but it is not ruled out that a part of the circuit is caused by fire. 2)、若電壓能升到額定值,可將設備轉入重載運行,觀察電流值是否能達到額定值,若電流不能升到額定值,并且多次在電流某一值附近過流保護,這可能是大電流干擾。要特別注意中頻大電流的電磁場對控制部分和信號線的干擾。 2), if the voltage can rise to the ratings, but putting the equipment into overload operation, observe whether the current value can reach rating, if can't rise to the current ratings, and near the current a value many times over-current protection, this may be a large current interference. Special attention should be paid to the interference of the electrical and magnetic field of the medium frequency current to the control section and the signal line. 3、設備正常運行時,易出現的故障 When the equipment is running properly, it is liable to fail 故障現象:設備運行正常,但在正常過流保護動作時,燒毀多支KP晶閘管和快熔。 Malfunction: the equipment is running normally, but in normal flow protection action, burn more KP thyristor and quick melting. 分析處理:過流保護時,為了向電網釋放平波電抗器的能量,整流橋由整流狀態轉到逆變狀態,這時如果а>1500就有可能造成有源逆變顛覆,燒毀多支晶閘管和快熔,開關跳閘,并伴隨有巨大的電流短路爆炸聲。對變壓器產生較大的電流和電磁力沖擊,嚴重時會損壞變壓器。 Analysis: over-current protection, in order to to the grid flat wave reactor of energy released, rectifier bridge rectifier state to the inverter state, at this moment if а > 1500 is likely to cause active inverter, burning more than thyristor and the fast fuse, switch trip, and is accompanied by huge short-circuit current explosion. The transformer can be damaged by a large current and electromagnetic force.
      版權所有 ? 河北保定興盛中頻設備有限公司  興盛中頻電爐設備主營:中頻電爐,中頻電源,中頻設備,熔煉爐,感應加熱電爐及配件與維修等
      地址:保定清苑工業區金線河堤南,保清公路保滄高速橋北,興盛路東行300米興盛路9號 手機:13503128018 電話:0312-7966818 聯系人:高先生 網址:www.www.xhashow.com
      友鏈:玻璃鋼管 蠕動泵 護坡磚模具

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