The motor can be driven in a 6-step trapezoidal commutation which is broadly used (see Figure 3), or it can be operated toĪchieve a more advanced vector control also called as Field Oriented Control (FOC), depending on the sophistication of the Orientation of the magnetic field induced by Switches (typically transistors), usually calledĬonfiguration will allow 3 bidirectional outputs For a 3-phase brushless DC motor, the driver is composed of 6 electronic To the relative position of the rotor vs. This means the phases of the motors are energized and unenergized in sequence according Unlike brush DC motors (for which the commutation is made mechanically by brushes), brushless DC motors areĮlectronically commutated. This document provides general guidelines when using a PWM driver with a It is useful to keep in mind some basic physical phenomena toĪvoid unexpected performance issues. Width Modulation) to drive brushless DC motors. Designers of motion systems often face challenges when selecting or developing electronics using PWM (Pulse
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