Research on the dynamometer system for double motorized spindles

Abstract

A new torque-loading method based on the direct torque control strategy for double motorized spindles is developed to achieve simulating the actual static and dynamic torque conditions and reduce the error of centration for back-toback drive reliability bench test of double motorized spindles. First, the direct torque control theory and dynamometer control strategy of two motorized spindles are discussed, and then the control model of the motorized spindle is developed in the d-q coordinate system based on the direct torque control theory. In order to verify the proposed control model, the direct torque control strategy simulation model of double motorized spindles is constructed, and the virtual simulation tests are conducted. Finally, the torque-loading experiments controlled by the direct torque control theory with 10 and 7.3 kW motorized spindles are performed. Experimental results show that the profile of the desired torque can be accurately followed and the proposed dynamometer system has a good response ability of speed and torque.

Reliability Test Rig of the Motorized Spindle and Improvements on Its Ability for High‐Speed and Long‐Term Tests

“…Chen [29] and Meng et al [30] modified a dynamometer to make the interdrag loading accurate in the experiment on the high-speed spindle. Jin et al [31] developed a novel torqueloading method based on a direct torque control strategy for double motorized spindles to apply the actual static and dynamic torque forces and verified the accuracy of the proposed dynamometer system. It can be seen that some researchers have made efforts to establish a comprehensive test rig, such as torque loading connected by a coupling and force loading transmitted by a mechanism.…”

Compilation of drilling load spectrum based on the characteristics of drilling force

“…Due to the limitations of the actual machining condition, in order to ensure the production efficiency, the bench reliability test of motorized spindle becomes an effective test method. The key technology of bench reliability test is to simulate the actual machining process of product, in order to trigger its real faults [2]. Therefore, the loading conditions of motorized spindle in the actual machining process need to be explored.…”