If you have a few fundamental pieces of laboratory equipment, you can measure the torque-speed curves for a 2668 CR series coreless dc motor at a specified operating point. The 2668W024CR has a nominal voltage of 24 V. The following discussion will describe the construction of a set of torque-speed curves for a typical DC motor from a series of raw data measurements. Normally, torque-speed curves are generated by plotting motor speed, motor current, mechanical output power, and efficiency as functions of the motor torque. While the use of torque-speed curves is much more common in technical literature for larger DC machines than it is for small, ironless core devices, the technique is applicable in either case. One commonly used method of plotting motor characteristics graphically is the use of torque-speed curves. First we’ll explain a more empirical approach, then we’ll perform a theoretical calculation. ![]() We’ve provided a method below to determine the motor parameters using the 2668W024CR coreless DC motor as an example.
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