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Brushed DC Motor
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The stator contains two or more permanent magnet pole pieces. The rotor contains windings connected to the voltage supply via brushes and a mechanical commutator. The opposite polarities of the energised winding and the stator magnet are attracted and the rotor rotates until is aligned with the stator. Just as the rotor reaches alignment, the brushes move across the commutator contacts and energise the next winding causing continuous rotation. The speed of the motor is proportional to the voltage applied to it. Reversing the connections to the motor reverses the direction of rotation. Applications include toys, toothbrushes, shavers, cordless tools, small fans. |
See detailed circuit diagrams below and device recommendations.
Motor Control Circuit
| Recommended Microcontrollers | Description |
|---|---|
| 78K0S Series (KY1+, KA1+, KB1+) | 10MHz, 8-bit low pin count single voltage Flash devices |
| 78K0 Series (KB2, KC2, KD2, KE2, KF2) | 20MHz Enhanced 8-bit single voltage Flash devices with LIN and IIC interfaces |
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