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变频器的快速调试分为四步，本文将分为两篇向大家详细介绍三菱变频器的快速调试进程。
第一步：三菱变频器的空载通电检验。
1 .将三菱变频器的接地端子接地。
2 将三菱变频器的电源输入端子通过漏电维护开关接到电源上。
3 查看三菱变频器显现窗出厂显现是否正常,如果不正确,应复位,不然要求退换。
4 了解变频器的操作键。一般的变频器均有工作(RUN)、中止(STOP)、编程(PROG)、数据P承认(DATAPENTER)、添加(UP、▲)、削减(DOWN、")等6个键,不同变频器操作键的界说根本相同。此外有的变频器还有监督(MONITORPDISPLAY)、复位(RESET)、寸动(JOG)、移位(SHIFT)等功用键。
第二步：三菱变频器带电机空载工作：
1.设置伺服电机的功率、极数,要归纳考虑变频器的作业电流。
2.设定三菱变频器的大输出频率、基频、设置转矩特性。通用变频器均备有多条VPf曲线供用户挑选,用户在运用时应依据负载的性质挑选适宜的VPf曲线。如果是风机和泵类负载,要将变频器的转矩工作代码设置成变转矩和降转矩工作特性。为了改进变频器发动时的低速功用,使电机输出的转矩能满意出产负载发动的要求,要调整发动转矩。在异步电机变频调速体系中,转矩的操控较杂乱。在低频段,因为电阻、漏电抗的影响不容疏忽,若仍保持VPf为常数,则磁通将减小,进而减小了电机的输出转矩。为此,在低频段要对电压进行恰当补偿以提高转矩。一般变频器均由用户进行人工设定补偿。
3.将三菱变频器设置为自带的键盘操作形式,按工作键、中止键,调查电机是否能正常地发动、中止。
4.了解三菱变频器工作发作毛病时的维护代码,调查热维护继电器的出厂值,调查过载维护的设定值,需求时能够修正。三菱变频器的运用人员能够按三菱变频器的运用说明书对三菱变频器的电子热继电器功用进行设定。当三菱变频器的输出电流超越其容许电流时,三菱变频器的过电流维护将堵截变频器的输出。因而,三菱变频器电子热继电器的门限大值不超越变频器的大容许输出电流。
三、带载试工作
1.手动操作变频器面板的工作中止键,调查电机工作中止进程及变频器的显现窗,看是否有异常现象。
2.如果发动P中止电机进程中变频器呈现过流维护动作,应从头设定加快P减速时刻。电机在加、减速时的加快度取决于加快转矩,而变频器在启、制动进程中的频率改变率是用户设定的。若电机转动惯量或电机负载改变,按预先设定的频率改变率升速或减速时,有可能呈现加快转矩不行,然后形成电机失速,即电机转速与变频器输出频率不和谐,然后形成过电流或过电压。因而,需求依据电机转动惯量和负载合理设定加、减速时刻,使变频器的频率改变率能与电机转速改变率相和谐。
查看此项设定是否合理的办法是先按经历选定加、减速时刻进行设定,若在发动进程中呈现过流,则可恰当延伸加快时刻;若在制动进程中呈现过流,则恰当延伸减速时刻。另一方面,加、减速时刻不宜设定太长,时刻太长将影响出产功率,特别是频频启、制动时。
3.如果变频器在限制的时刻内依然维护,应改变发动P中止的工作曲线,从直线改为S形、U形线或S形、反U形线。电机负载惯性较大时,应该选用更长的发动中止时刻,而且依据其负载特性设置工作曲线类型。
4.如果变频器依然存在工作毛病,应测验添加大电流的维护值,但是不能取消维护,应留有至少10%～20%的维护余量。
5.如果变频器工作毛病仍是发作,应替换更大一级功率的变频器
6.如果变频器带动电机在发动进程中达不到预设速度,可能有两种状况:
(1)体系发作机电共振,能够从电机工作的声响进行判别。
选用设置频率跳动值的办法,能够避开共振点。一般变频器能设定跳动点。VPf操控的变频器驱动异步电机时,在某些频率段,电机的电流、转速会发作振动,严峻时体系无法工作,甚至在加快进程中呈现过电流维护使得电机不能正常发动,在电机轻载或转动惯量较小时更为严峻。一般变频器均备有频率跨跳功用,用户能够依据体系呈现振动的频率点,在VPf曲线上设置跨跳点及跨跳宽度。当电机加快时能够主动越过这些频率段,确保体系能够正常工作。
(2)电机的转矩输出才能不行,不同品牌的变频器出厂参数设置不同,在相同的条件下,带载才能不同,也可能因变频器操控办法不同,形成电机的带载才能不同;或因体系的输出功率不同,形成带载才能会有所差异。关于这种状况,能够添加转矩提高量的值。如果达不到,可用手动转矩提高功用,不要设定过大,电机这时的温升会添加。如果依然不行,应改用新的操控办法,比如日立变频器选用VPf比值稳定的办法,发动达不到要求时,改用无速度传感器空间矢量操控办法,它具有更大的转矩输出才能。关于风机和泵类负载,应削减降转矩的曲线值。
四、变频器与上位机相连进行体系调试在手动的根本设定完成后,如果体系中有上位机,将变频器的操控线直接与上位机操控线相连,并将变频器的操作形式改为端子操控。依据上位机体系的需求,调定变频器接纳频率信号端子的量程0～5V或0～10V,以及变频器对模仿频率信号采样的响应速度。如果需求别的的监督表头,应挑选模仿输出的监督量,并调整变频器输出监督量端子的量程。

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