JPS61150644A - Frequency generator - Google Patents

Abstract

PURPOSE:To facilitate production and increase output, by fixing a gear-shaped magnet on a magnetic unit rotor and by providing a generating coil confronting the tooth section of the gear-shaped magnet. CONSTITUTION:A gear-shaped magnet 21 is fixed on a magnetic unit rotor 10. A plurality of tooth sections which are concentric with a rotary shaft 1 and are protruded in the rotating radial direction, are provided for the gear- shaped magnet 21, and each tooth section is magnetized in the axial direction of the rotary shaft 1. A generating coil 7 formed in a rectangular-corrugated shape concentric to the rotary shaft 1 and at a specified pitch confronts the gear-shaped magnet 21 with a specified space, and the density variation of magnetic flux produced by the tooth sections of the gear-shaped magnet 21 is converted to voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Sedentary Work] This invention relates to a frequency control system used in a variable speed aircraft T111 aircraft.

[Conventional technology]

FIG. 5 is a sectional view showing an example of a brushless motor equipped with a conventional frequency 3FM [(FG).
1 is the rotating shaft, 2.3 is the bearing, 4 is the bracket, 5
is a magnetic film V-frame, 6 is a substrate, T is a power generation coil, 8 is F
G magnet, 9 is a drive magnet, 10 is a magnetic rotor, 11 is a spacer, 12 is a stator core, and 13 is a coil.

Bracket 4 that becomes the fixed side for attaching to the set
supports the rotating shaft 1 via a bearing 2.3, and 1
A magnetic rotor 10 is fixed to the rotating shaft 1 via a spacer 11, forming a VB magnetic rotor.

A drive magnet 9 and an FG magnet 8 are fixed to the drive magnet 9 and the FG magnet 8, respectively. A power generating coil T formed on the substrate 6 is arranged at a location separated from the FG magnet 8 by a required gap.

Next, the operation will be explained. In Figure 5, coil 1
When the 31C current is supplied, a magnetic force acts between the stator core 12 and the driving magnet 90.

A rotational force acts on the driving magnet 9, and as a result, F
The G magnet 8 rotates. As shown in FIGS. 6 and 7, the FG magnet 8 has a large number of magnetic poles, each consisting of an N pole and an S pole, magnetized on a surface at an angle l to the rotating shaft 1. At this time,
The flow of magnetic flux is the ON pole of the FG magnet 8 - the magnetic rotor 1O - the S pole of the FG magnet 8, and when the FG magnet 8 rotates, the magnetic flux crosses the generator coil T.

At its tip, an alternating current voltage is generated with a frequency proportional to the rotational speed.

[Problem that the invention seeks to solve]

In the conventional frequency photoelectric machine as described above, in order to control the motor which requires high rotational accuracy, the FG magnet 8 is magnetized with a very large number of N and S poles to generate pulses per rotation. A large number of magnetizing yokes must be produced, which makes it difficult to manufacture the magnetizing yoke and results in low output.

This invention was made to solve the above problem, and simply applies N in the thickness direction of the magnet.

S-pole magnetization requires only row 5, the number of pulses per revolution can be easily obtained, and the frequency is 3t', which has a large output.
The purpose is to obtain an opportunity.

[Means for solving problems]

In the frequency photoelectric machine according to the present invention, a gear-shaped magnet is fixed to a magnetic rotor, and a large number of teeth are provided on the gear-shaped magnet that are concentric with the rotation axis and protrude in the rotation radial direction. Each tooth is magnetized in the axial direction of the rotating shaft, and on the other hand, it is opposed to the tooth of the gear-shaped magnet with a required gap (7) and is formed in a rectangular wave shape concentrically with respect to the rotating shaft at a predetermined pitch. It is equipped with xA Asahi Cocoil.

[Effect]

In this invention, the gear-shaped magnet is magnetized in the direction of its thickness (that is, in the axial direction of the rotating shaft) so that one surface is N pole and the other surface is S&; 3tTK is achieved by creating magnetic flux density in certain parts and non-existent parts, and as the gear-shaped magnet rotates, magnetic flux density and density crosses the generator coil.

〔Example〕

FIG. 1 is a sectional view showing an embodiment of the present invention, and in this figure, the same reference numerals as in FIG. 5 indicate the same parts.

21 is a gear-shaped magnet. A magnetic rotor 10 is fixed to the rotating shaft 1 via a spacer 11.

A driving magnet 9 and a gear-like magnet 21 are fixed to the magnetic rotor 10.

FIG. 2 is a plan view of the gear-shaped magnet 21 viewed from the axial direction of the rotary shaft 1, and FIG. 3 is a side view of FIG. 2. Reference numerals 22 in FIG. 3 shown in FIG. 4 is opposed to the dragon coil T with a required gap between the gear-shaped magnet 21 and the gear-shaped magnet 2.
Converts the loose and dense movement of magnetic flux produced by the teeth of No. 1 into voltage.

As can be seen from FIG. 3, the gear-shaped magnet 21 is magnetized in the thickness direction indicated by the arrow A, that is, in the axial direction of the rotating shaft 1, so that one surface is the north pole and the other surface is the south pole. There is. Therefore, as the magnetic rotor 10 rotates, the gear-like magnet 21 also rotates, and the magnetic flux intersects with the optical turtle coil T through its teeth 22t to generate an alternating current voltage proportional to one rotational speed.

In the above embodiment, the tooth portion 22 of the gear-shaped magnet 21 is located on the outer circumference, but even if the tooth portion 22 is located on the inner circumference, the same effect as in the above embodiment can be obtained.

〔Effect of the invention〕

As explained above, in this invention, a gear-shaped magnet is fixed to the magnetic rotor in an electric machine with a frequency 3 fixed magnetic rotor, and the gear-shaped magnet is concentric with the rotating shaft and has a force i and a rotation radius. In addition to providing a large number of teeth protruding in the direction, each of these teeth is magnetized in the axial direction of the rotating shaft, and on the other hand, the teeth of the gear-shaped magnet and the required air FjL are
Since the electric coil 3 formed in a rectangular wave shape at a predetermined pitch and facing the rotating shaft is provided, the gear-shaped magnet can be easily manufactured by punching or molding. Since the magnetic direction is simply the axial direction, that is, the thickness direction, manufacturing costs are reduced, a large number of pulses per rotation can be obtained, and a large output can be obtained.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention, Fig. 2 is a plan view of the gear-shaped magnet shown in Fig. 1, Fig. #g3 is a side view of Fig. 2, and Fig. 4 is an xA of Fig. 1. Kamekokoil floor plan, 5th
The figure is a sectional view showing an example of a conventional frequency generator, Figure 6 is a plan view of the FG magnet in Figure 5, and Figure 7 is a radial development view showing li5 & Y of the FG magnet in Figure 6. . - In the figure, 1 is the rotor, 2 and 3 are the bearings. 4 is a placket, 5 is a magnetic frame, 6 is a substrate, 7 is a power generating coil, 9 is a driving magnet, 10 is a magnetic rotor, 12 is a stator core, 13 is a coil, 21 is a gear-shaped magnet, 23 is a tooth portion It is. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Masu Oiwa Jll (2 others) Fig. 1 2.3: Bearing 4 Nibble bracket 5: Magnetic frame 12: Stator core 13: Coil 21: Gear-shaped mag kit Fig. 2 Fig. 4 Fig. 5

Claims (1)

[Claims] In a frequency generator in which a stator core having a magnetic frame and a coil wound thereon is fixed to a bracket, and a magnetic rotor is fixed to a rotating shaft supported by the bracket, a gear-shaped magnet is attached to the magnetic rotor. The gear-shaped magnet is provided with a large number of teeth that are concentric with the rotating shaft and protrude in the radial direction of rotation, and each of these teeth is magnetized in the axial direction of the rotating shaft, and 2. A frequency generator, comprising: a power generating coil formed in a rectangular wave shape at a predetermined pitch and facing the tooth portion of the gear-like magnet with a predetermined pitch and concentrically with respect to the rotating shaft.