COGGING TEST SYSTEM FEATURES ▪ Measures Detent Torque, Cogging Torque and Friction Torque ▪ Torque Detection: < 1 mN∙m ... 2 N∙m ▪ Rated torque range (RT): 50 / 100 / 200 / 500 / 1 000 / 2 000 mN∙m ▪ Accuracy: 0.1 % of RT ▪ Angle Resolution 0.018° (5 000 Pulse Per Revolution) ▪ Operating speed 1 ... 10 rpm (other speed optional) ▪ Operating Direction CW / CCW ▪ USB Interface ▪ Executable Specific Cogging Test Software ▪ Peak Detection Fig. 1: Cogging Test System with optional FMF Fixed Motor Fixture and dedicated Cogging Test Software (computer not included, available as an option). ▪ X-Y, Polar and FFT Graphs ▪ Multi-graph capability compares up to 5 curves ▪ Data Acquisition and Storage in TXT (Export in CSV files possible) OPERATING PRINCIPLE motors, which causes torque ripple, vibration and noise. Generally the cogging torque varies with rotor position and is defined by its peak to peak (p-p) value. Friction Torque is attributed to mechanical assembly issues, such as bearing resistance, assembly tolerance, or carbon-brush friction for brush PM DC (PMDC) motors. Friction Torque is commonly measured by its average value. S Fig. 3: When the magnets are face-to-face (above left), the force is maximized. When the motor is running (above right), the moving magnetic elements will first have to free themselves from the residual magnetism before proceeding to the next step. This resistance to advancement is named cogging. © 2023 MAGTROL | Due to continual product development, Magtrol reserves the right to modify specifications without forewarning. Fig. 2: Example of typical curve for cogging. Friction is an average value calculated from 0 torque. Cogging value is calculated on the peak torque value. Torque [mNm] The Drag Torque or Detent Torque is an important parameter in Permanent Magnet (PM) motors, especially in a PM servo motor system. The Detent Torque of PM motors is composed of Cogging Torque and Friction Torque. The Cogging Torque is generated by attraction/interaction of the magnetic poles to the teeth (steel structure) within an un-energized motor. It is one of

CTS SERIES DESCRIPTION Magtrol’s Cogging Test System is a stand-alone test system designed to control and measure Detent Torque, Cogging Torque and Friction Torque. The test System includes a precision geared motor, a TS Series Torque Sensor integrating a 5 000 pulses encoder. CTS 100 to CTS 102 have a built-in security clutches to avoid system overload by mishandling when not in use. The geared motor drives the MUT (Motor Under Test) at a low speed from 1 ... 10 rpm (other speed available as an option), while acquiring its cogging torque related to angle position. The torque measurement covers...

H MAGTROLSPECIFICATIONS MECHANICAL CHARACTERISTICS a) Other ranges available on request b) Can easily be scaled up or down (50, 100 or 200 mNm), by replacing the TS Sensor which is mounted in front of the unit. The software will recognize the torque sensor being in use and will automatically adapt its measuring range. c) Optionally, CTS with max speed 20 rpm using different gear ratio could be delivered. Lower speed system are however recommended for a better measuring quality. Other speeds are available on request. d) PPR means Pulse Per Revolution POWER SUPPLY NOTE:All values are in metric...

H MAGTROLSYSTEM OPTIONS VERTICAL MOUNTING KIT To ensure optimal value acquisition in the lower measurement ranges (mainly with the CTS 100 - 50 mN-m), it is strongly recommended to use the system in a vertical position. Magtrol offers (as an option) a vertical mounting kit with accessory. This kit can be used with all CTS models. Positioning and alignment have a great influence on the measured parameters (friction torque). MAGTROL strongly recommended to provide a support specifically dedicated to the products to be tested to ensure the best positioning tolerances in X-Y, and its repeatability....