1:风机和水泵是最普通的负载：对变频器的要求最为简单，对变频器技术和可靠性要求都不高。大量的国内品牌提供该类负载的变频器，只要变频器容量等于电动机容量即可（空压机、深水泵、泥沙泵、快速变化的音乐喷泉需加大容量）。 1: fan and water pump are the most common load: the frequency converter requirements are the most simple, the inverter technology and reliability requirements are not high. A large number of domestic brands to provide such a load transducer, as long as the frequency converter capacity is equal to the capacity of the motor (air compressor, deep water pump, sediment pump, fast changing music fountain need to increase capacity). 2:起重机类负载：这类负载的特点是启动时冲击很大，因此要求变频器有一定余量。同时，在重物下放肘，会有能量回馈，因此要使用制动单元或采用共用母线方式。 2: crane class load: this kind of load is characterized by a great impact at startup, so the inverter has a certain margin. At the same time, the elbow will be energy feedback, so you should use the brake unit or share the bus. 3:不均行负载：有的负载有时轻，有时重，此时应按照重负载的情况来选择变频器容量，例如轧钢机机械、粉碎机械、搅拌机等。 3: uneven load: some of the load is sometimes light, sometimes heavy, at this time should be in accordance with heavy load to select frequency converter capacity, such as steel rolling machine, grinding machine, mixer and so on. 4:大惯性负载：如离心机、冲床、水泥厂的旋转窑，此类负载惯性很大，因此启动时可能会振荡，电动机减速时有能量回馈。应该用容量稍大的变频器来加快启动，避免振荡。配合制动单元消除回馈电能。 4: large inertial load: such as centrifuges, presses, cement plant rotary kiln, such load is very large, so it may start oscillation, motor slowdown when there is energy feedback. A slightly larger frequency converter should be used to speed up starting and avoid oscillation. Eliminate the feedback energy with the brake unit. 5.提升类负载：该类负载对变频器技术要求最高，要求适应频繁的起停和正反转、大启动转矩，因为应用行业为与人直接相关的作业，要求较高可靠性。德力西是该类变频器的典型供应商。 5. lifting load: the load on the drive type of the highest technical requirements, to adapt to frequent starting and stopping and reversing, high starting torque, because the application industry is directly related to people and work, high reliability. The supplier is a typical Delixi inverter.