2015/12/17 15:31:36 来源: 福州鸿飞达自动化科技有限公司
170ADO35000
170ADO35000
170ADO35000
控制方式
低压通用变频输出电压为380~650V,输出功率为0.75~400kW,工作频率为0~400Hz,它的主电路都采用交—直—交电路。其控制方式经历了以下四代。
1U/f=C的正弦脉宽调制(SPWM)控制方式:
其特点是控制电路结构简单、成本较低,机械特性硬度也较好,能够满足一般传动的平滑调速要求,已在产业的各个领域得到广泛应用。但是,这种控制方式在低频时,由于输出电压较低,转矩受定子电阻压降的影响比较显著,使输出最大转矩减小。另外,其机械特性终究没有直流电动机硬,动态转矩能力和静态调速性能都还不尽如人意,且系统性能不高、控制曲线会随负载的变化而变化,转矩响应慢、电机转矩利用率不高,低速时因定子电阻和逆变器死区效应的存在而性能下降,稳定性变差等。因此人们又研究出矢量控制变频调速。
电压空间矢量(SVPWM)控制方式:
它是以三相波形整体生成效果为前提,以逼近电机气隙的理想圆形旋转磁场轨迹为目的,一次生成三相调制波形,以内切多边形逼近圆的方式进行控制的。经实践使用后又有所改进,即引入频给定方式
变频器常见的频率给定方式主要有:操作器键盘给定、接点信号给定、模拟信号给定、脉冲信号给定和通讯
方式给定等。这些频率给定方式各有优缺点,须按照实际所需进行选择设置,同时也可以根据功能需要选择不同频率给定方式之间的叠加和切换。
【公 司】: 福州鸿飞达自动化科技有限公司
【主 营】: AB(罗克韦尔)PLC全系列、ABB机器人系统备件、施耐德140/TSX、西门子6SN/6FC、伺服系统全套等
【价 格】: 电议
【发布人】: 程先生
【电 话】: 13625073704
【所在地】: 福建 - 福州
【坐 机】: 0591-83532940
【Q Q】: 2851617309
【传 真】: 0591-88263940
【邮 箱】: 2851617309@qq.com
MDF60A0015-5A3-4-00GEB
MDF60A0015-5A3-4-0T
MDF60A0015-5A3-4-0T GEB
MDF60A0040-5A3-4-00GEB
MDF60A0055-5A3-4-00
MDF60A0220-503-4-00 22,0kW
MDF60A0450-503-4-00
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MDS60A0015-5A3-4-00
MDS60A0015-5A3-4-00Nr
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MDV60A0015-5A3-4-0T
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MDV60A0022-5A3-4-00 2,2kW
MDV60A0022-5A3-4-0T
MDV60A0030-5A3-4-00
MDV60A0030-5A3-4-00 3,0kW
MDV60A0040-5A3-4-0T
MDV60A0040-5A3-4-0T 4,0 KW
MDV60A0055-5A3-4-00
MDV60A0055-5A3-4-0T
MDV60A0055-5A3-4-0T 5,5 KW
MDV60A0075-5A3-4-00 7,5
MDV60A0075-5A3-4-00 8264872
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MDV60A0220-503-4-00 变频器
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MDV60A030-5A3-4-0T
MDV60A0370-503-4-0T
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MDX60A0110-5A3-4-00
MDX60A0150503400
MDX60A0150-503-4-00
MDX60A0370-
MDX60A3070-503-4-00
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MDX60B0014-5A3-4-00 1,5 KW
MDX61 B0015-5A3-4-00
MDX61 B0022-5A3-4-00
MDX61 B0022-5A3-4-00
MDX61 B00300-
MDX61 B0030-5A3-4-00
MDX61 B0075-5A3-4-00Pr
MDX61 B0110-503-4-5C
MDX61 B0110-503-4-5C Pr
MDX61 B0220-503-4-00 22
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MDX61B0011-5A3-4-0T
MDX61B00145A3400
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MDX61B0014-5A3-4-OT
MDX61B0014-5A3-4-OT
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MFC41A0030-5A3-4-00
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