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Erschienen in:
2019 | OriginalPaper | Buchkapitel
23. DC Motors
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Abstract
The DC (direct current) motor has many applications in robotics, portable power tools, and electric vehicles. DC motors are driven by the force generated in a magnetic field. Passing a current through an electromagnet, which is a coil of wire wrapped around a metallic rod, generates a magnetic field and reversing the current changes the polarity of the electromagnet. Given that same-pole magnets repel and dissimilar-pole magnets attract, then mounting two electromagnets on a rotor enclosed within a permanent magnet and alternating the current through the electromagnets turns the rotor as the magnets sequentially attract and repel.