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MotorControl-Slide2

One of the most popular motors today is the multi-phase, brushless dc motor. Its operation is well understood and it’s relatively easy to control precisely. The diagram, on the top right corner, shows a three-phase, two-pole motor. The rotor consists of a two pole magnet and the stator consists of windings which are driven by three phase currents. These currents create a rotating magnetic flux which interacts with the magnet and causes it to rotate. Correct operation requires tight control of the magnitude and relative phases of the currents flowing into the motor coils. The dc brushless motor will serve to illustrate the building blocks for closed loop control.

PTM Published on: 2009-09-02