电涡流测功机主要加载范畴

　　电涡流测功机是目前国内先进的加载测功设备，主要用来测量各种动力装置的机械性能。DW及DWD系列主要由旋转部分(感应盘)、摆动部分(电枢和励磁部分)、测力部分和校正部分组成。

　　励磁绕组通电后，产生一个闭合磁通。当感应盘(齿状)旋转时，气隙磁密随之发生周期性变化，感应出涡流，由于“涡流”和磁场的耦合作用，在转子上产生制动力矩，而在电枢体上则产生与拖动力矩相同的转矩，并经装在电枢体四氟上的力传感器检测出来，从而达到测试扭矩的目的。 在转速测量上，采用非接触式的磁电式转速传感器，将转速信号转换成电信号输出。

　　本机适用于中、小型功率电机、汽车、内燃机、燃气轮机、水轮机、工程机械、林业、矿山、石油钻采等机械的性能试验，也可作为其它动力设备的吸功装置消声设备。

　　性能特点

　　结构简单，操作维护方便;

　　制动力矩大，测试精度高，工作稳定;

　　转动惯量小，动态响应快;

　　与测控系统配套，可实现自动化操作。

　　性能指标

　　冷却水压：0.02～0.1Mpa。

　　测功机出水温度：小于55oC

　　工作方向：左旋或右旋，连续工作。

　　扭矩测量精度：±0.4%F.S

　　转速测量精度：±1r/min

　　Eddy current dynamometer is the advanced load dynamometer equipment, mainly used to measure the mechanical properties of various power plant. DW, and DWD series mainly by the rotating part (sensor plate), swing part (armature and the excitation part), part of the measuring and calibration components.

　　After the excitation winding power to produce a closed magnetic flux. When the sensor disk (dentate) rotation, the air-gap flux density in the ensuing cyclical changes, induced eddy current, due to "swirl" and the magnetic field coupling, in the rotor to generate braking torque, and in the armature body, while in produces the same torque and drag torque, and mounted on the armature by the force sensors on the body of PTFE detected, so as to achieve the purpose of testing torque. In the speed measurements, using non-contact magnetic-electric speed sensor, the output speed signals into electrical signals.

　　This machine suitable for medium and small-power motors, automobiles, internal combustion engines, gas turbines, turbine, engineering, machinery, forestry, mining, oil drilling and other mechanical performance tests, but also other power equipment can be used as the suction power device muffler equipment.

　　DW Series (disc) eddy current dynamometer

　　DWB Series (claw type) eddy current dynamometer

　　Features ：

　　Simple structure, convenient operation and maintenance;

　　Braking torque large, high accuracy, stable;

　　Moment of inertia is small, fast dynamic response;

　　Supporting monitoring and control system can realize automation.

　　Performance：

　　Cooling water pressure: 0.02 ~ 0.1Mpa.

　　Dynamometer water temperature: less than 55oC

　　Direction: L-or D, continuous work.

　　Torque measurement accuracy: ± 0.4% F.S

　　Speed Measurement Accuracy: ± 1r/min