JPS6284371U - - Google Patents

Description

[Brief explanation of the drawing]

1 and 2 are diagrams showing an embodiment of the brushless electric motor according to this invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a plan view of the stator and the first stator coil, and FIG. Figures 3 to 5 are diagrams showing a conventional surface-to-face type brushless electric motor, with Figure 3 being a longitudinal sectional view, Figure 4 being a plan view of the stator coils, and Figure 5 being a diagram of the rotor permanent magnets. Magnetization state diagrams, Figures 6 and 7 are diagrams showing a conventional brushless electric motor with an outer rotor with an iron core, Figure 6 is a longitudinal sectional view, and Figure 7 is a planar arrangement of the stator and permanent magnets. It is a diagram. In the figure, 1 is a substrate, 6 is a rotor, 7 is a first permanent magnet, 8 is a first stator coil, 11 is a stator,
11a is a pole piece, 12 is a second stator coil, 13
is the second permanent magnet and A is the stator center. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] a plate-shaped rotor pivotally supported by a substrate; a first permanent magnet fixed to the circumferential surface of the rotor facing the substrate and alternately magnetized with different poles;
A plurality of first stator coils are provided facing the permanent magnets and fixed on the substrate, and a second stator coil is wound around pole pieces fixed on the substrate and extending radially. a second permanent magnet arranged opposite to the pole pieces of the stator, fixed to the rotor and alternately magnetized with different poles;
A brushless electric motor, wherein the first stator coil and the pole piece of the stator are arranged in the same number, and the first stator coil is arranged on a radial line centered on the center of the stator.