Generators having rotors that provide alternate magnetic circuits
View Patent ↗A generator includes a stator that has permanent magnets that complete a magnetic circuit across a series of gaps and through a generator coil. The rotor also includes permanent magnets that complete a magnetic circuit across a gap and through a rotor coil. When the rotor poles align with the stator poles, the stator and rotor magnetic circuits are broken, and new magnetic circuits are completed between the stator and rotor permanent magnets that cross the gap between the stator and rotor poles. A rotor coil can be used to boost the attraction/repulsion between to rotor and stator magnets. Alternating between these magnetic circuits as the prime mover rotates the rotor generates electricity.
1. A generator comprising:
a stator comprising:
a generator coil wrapped around a generator core;
a first magnetic flux element having a first stator pole;
a second magnetic flux elements having a second stator pole; and
a rotor comprising:
a third magnetic flux element having first and second rotor poles;
a rotor coil wrapped around the third magnetic flux element, wherein an on-and-off timing of current through the rotor coil is configured to boost rotor momentum;
a third magnetic flux donor that donates magnetic flux having a second polarity to the third magnetic flux element; and
a fourth magnetic flux donor that donates magnetic flux having a first polarity to the third magnetic flux element, and
wherein the first stator pole and the first rotor pole are magnetically coupled across a third medium having a third reluctance when the first rotor pole is substantially aligned with the first stator pole, and
wherein a first reluctance is greater than the third reluctance when the first rotor pole is substantially aligned with the first stator pole.
2. The generator of claim 1 , wherein the third magnetic flux donor and the fourth magnetic flux donor are permanent magnets.
3. The generator of claim 1 , wherein the third magnetic flux donor comprises a permanent magnet magnetically coupled to the third magnetic flux element on a same side of the rotor coil as a third rotor pole.
4. The generator of claim 3 , wherein the fourth magnetic flux donor comprises a permanent magnet magnetically coupled to the third magnetic flux element on a same side of the rotor coil as a fourth rotor pole.
5. The generator of claim 4 , further comprising a magnetic flux yoke that completes a magnetic circuit between magnetic flux of the second polarity from the third magnetic flux donor and magnetic flux of the first polarity from the fourth magnetic flux donor.
6. The generator of claim 1 , further comprising a magnetic flux yoke, magnetically coupled to a first end and a second end of the generator core.
7. The generator of claim 1 , wherein the stator comprises an odd number of pole pairs.
8. The generator of claim 1 , wherein the rotor comprises an odd number of pole pairs.
9. The generator of claim 1 , wherein the on-and-off timing of the current through the rotor coil produces a magnetic flux which increases an attractive force between the first rotor pole and the first stator pole to boost rotor momentum.
10. The generator of claim 1 , wherein the on-and-off timing of the current through the rotor coil reverses a current through the rotor coil which reverses a direction of a first magnetic flux of the first magnetic flux donor which boosts rotor momentum by causing the first stator pole to repel the first rotor pole.