| 变频器的五大选用技巧 |
| 添加时间：2018/9/1 14:21:10 浏览次数： |
| 1、需要控制的电机及变频器自身 1, the motor and inverter that need to be controlled are themselves. 电机的极数。一般电机极数以不多于(极为宜，否则变频器容量就要适当加大。转矩特性、临界转矩、加速转矩。在同等电机功率情况下，相对于高过载转矩模式，变频器规格可以降额选取。电磁兼容性。为减少主电源干扰，使用时可在中间电路或变频器输入电路中增加电抗器，或安装前置隔离变压器。一般当电机与变频器距离超过50m时，应在它们中间串入电抗器、滤波器或采用屏蔽防护电缆 。 The pole number of the motor. General motor number is not more than (extremely suitable), otherwise the capacity of the inverter should be appropriately increased. Torque characteristics, critical torque and acceleration torque. With the same motor power, the inverter specifications can be reduced relative to the high overload torque mode. Electromagnetic compatibility. In order to reduce the interference of the main power supply, a reactor can be added to the intermediate circuit or the input circuit of the frequency converter, or a pre-isolated transformer can be installed. Generally, when the distance between the motor and the frequency converter is more than 50 m, the reactor, filter or shielded protective cable should be connected in series between them. 2、变频器功率的选用 2. Selection of transducer power 系统效率等于变频器效率与电动机效率的乘积，只有两者都处在较高的效率下工作时，则系统效率才较高 。从效率角度出发，在选用变频器功率时，要注意以下几点： The system efficiency is equal to the product of the inverter efficiency and the motor efficiency. Only when both of them work at higher efficiency, the system efficiency is higher. From the point of efficiency, we should pay attention to the following points when choosing the power of transducer. 变频器功率值与电动机功率值相当时最合适，以利变频器在高的效率值下运转。 Frequency converter power value and motor power value is the most appropriate, in order to facilitate the frequency converter operating at high efficiency. 在变频器的功率分级与电动机功率分级不相同时，则变频器的功率要尽可能接近电动机的功率，但应略大于电动机的功率。 When the power classification of the inverter is not the same as that of the motor, the power of the inverter should be as close to that of the motor as possible, but slightly greater than that of the motor. 当电动机属频繁起动、制动工作或处于重载起动且较频繁工作时，可选取大一级的变频器，以利用变频器长期、安全地运行。 When the motor is frequently started, brake work or in heavy-load start and more frequent work, can choose a large frequency converter, to use the converter long-term, safe operation. 经测试，电动机实际功率确实有富余，可以考虑选用功率小于电动机功率的变频器，但要注意瞬时峰值电流是否会造成过电流保护动作。 After testing, the actual power of the motor is indeed redundant, we can consider the choice of power less than motor power inverter, but we should pay attention to whether the instantaneous peak current will cause overcurrent protection action. 当变频器与电动机功率不相同时，则必须相应调整节能程序的设置，以利达到较高的节能效果 。 When the power of inverter and motor is not the same, it is necessary to adjust the setting of energy-saving program to achieve a higher energy-saving effect. |
| 上一页 变频器（VFD）是应用变频技术与微电子技术 |
| 下一页 变频器基本组成 |
Copyright © 技术支持：遨游网络