Build Your Own Electric Vehicle by Seth Leitman

Author:Seth Leitman
Language: eng
Format: epub
Publisher: McGraw-Hill Education
Published: 2013-07-14T16:00:00+00:00

FIGURE 6-2 DC motor basics—obtaining torque from moving conductors.

Ampere’s Law or the Motor Rule

Current flowing through a conductor at a right angle to a magnetic field produces a force on the conductor. The right-hand rule is again a handy way to remember the relationships, but this time the thumb of your right hand points toward you in the direction of the current through the conductor, your extended index finger at right angles to it points in the direction of the flux (from the north to the south pole), and your extended third finger points downward in a direction at right angles to the other two, indicating the direction of the generated force, as shown in Figure 6-2. Now you’re ready to talk seriously about motors.

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