Three-phase magnetic generator
View Patent ↗A terminal plate set has multiple terminal plates and fitting legs. Each terminal plate has a transverse bar portion and a longitudinal bar portion. If the fitting legs of the terminal plate set are press-fit into fitting through holes, terminals of the transverse bar portions are positioned on an axial end side of a rotor, and terminals of the longitudinal bar portions are positioned on the other axial end side of the rotor. The length of the transverse bar portions are adjusted so that the terminals of the transverse bar portions are positioned near coil wire leads to be connected with the terminals of the transverse bar portions.
1. A three-phase magnetic generator having a rotor that has rare-earth magnets, and a stator that has three coil groups, the generator comprising:
a terminal plate set fixed into a fitting through hole formed in an annular portion of a core of the stator, the core provided radially inside winding portions of the stator, around which the coil groups are wound, wherein
the terminal plate set includes three substantially T-shaped terminal plates and a resin mold for fixing and holding the three terminal plates, each one of the terminal plates includes a transverse bar portion and a longitudinal bar portion,
each one of the terminal plates includes a terminal of the transverse bar portion connected with a coil wire lead of a respective coil group and a terminal of the longitudinal bar portion connected with an output lead,
the resin mold covers the three terminal plates except for the terminals and is formed with a fitting leg around the longitudinal bar portion, the fitting leg being press-fit into the fitting through hole,
the terminal plate set is structured so that the terminal of the transverse bar portion is positioned near the coil wire lead on an axial end side of the rotor and the terminal of the longitudinal bar portion is positioned on the other axial end side of the rotor when the fitting leg is press-fit into the fitting through hole, and
the coil groups are connected in a delta connection so that an electric angle phase difference substantially becomes 240°.
2. The generator as in claim 1 , wherein
a length of the transverse bar portion of the terminal plate is set to position the terminal of the transverse bar portion near the end of the coil wire lead.
3. The generator as in claim 1 , wherein
the terminal plates are formed with bonding holes filled with a resin.
4. The generator as in claim 1 , wherein
the rotor has a pole number that is 4n, n being any one of integers from four to eight, and
the stator has a pole number that is 3n.
5. The generator as in claim 1 , wherein
the winding portions of the core are coated with a powder resin coating.
6. The generator as in claim 1 , wherein
each one of the coil groups is formed by winding a copper wire having a diameter that is from 1.3 mm to 2.0 mm, around the winding portions of the core in a same direction in a concentrated winding manner while skipping two winding portions.
7. The generator as in claim 5 , wherein the coil groups are wound around the winding portions only through the powder resin coating.