JPH0474943B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inductor type generator, which is a type of synchronous generator, and particularly relates to an inductor type generator that can obtain high output.

An inductive generator is known as a type of synchronous generator. In this generator, an armature coil and a field coil are provided on the stator, and inductor magnetic poles are provided on the rotor side. Therefore, when the field coil is excited, the magnetic flux density changes at a constant period due to the inductor magnetic poles as the rotor rotates, and this magnetic flux interlinks with the armature coil on the stator side. Therefore, an output voltage is induced in the armature coil, which can be extracted and used as power generation output. Since such inductor-type generators do not have an armature coil or field coil on the rotor side, they do not require brushes or slip rings, and can obtain high-frequency power with a simple structure. You will be able to do this.

When such an inductor type generator is applied to an automobile retarder, the work applied from the outside when the generator generates electricity is used as braking force, and this braking force Vehicle braking can be performed. Since the braking force at this time is approximately proportional to the efficiency of the generator, the output must be increased without increasing leakage magnetic flux as much as possible.

The present invention has been made in view of these problems, and by providing an auxiliary coil on the rotor side, it is possible to increase output by performing a magnetizing action without increasing leakage magnetic flux. It is an object of the present invention to provide an inductor type generator as described above.

In the present invention, an inductor magnetic pole is provided on the rotor side, and an armature coil and a field coil are provided on the stator side, and the magnetic path is changed by moving the inductor as the rotor rotates. In an inductor type generator that generates power output by linking the magnetic flux that changes with the change of the magnetic path with the armature coil,
An auxiliary coil is wound around the inductor magnetic poles on the rotor side, and both ends of this auxiliary coil are short-circuited via a capacitor, and a short-circuit current that is almost in phase with the magnetic flux interlinking with the armature coil is passed through the auxiliary coil. This is how it was done.

The present invention will be explained below with reference to an illustrated embodiment.
FIG. 1 shows an engine 1 equipped with a retarder made of an inductor type generator according to this embodiment, and this engine 1 is composed of, for example, a diesel engine. A flywheel housing 2 is disposed on the rear side of the engine 1, and a flywheel 4 fixed to a crankshaft 3 is disposed inside the housing 2 as shown in FIG.
is stored. Further, on the rear side of the housing 2, there is a transmission 5 as shown in FIG.
is installed, and this transmission 5
The rotational speed of the engine 1 is changed to an appropriate value by the propeller shaft 6, and the speed is transmitted to the drive wheels via the propeller shaft 6.

Next, regarding the inductor type generator that constitutes the retarder, as shown in FIG. is provided. The flywheel 4 to which the inductor magnetic poles 7 are attached constitutes a rotor of an inductor type generator. A case 8 is provided on the upper and lower sides of the housing 2, and a stator of the inductor type generator is disposed within the case 8.

The structure of this stator will be explained with reference to Figure 3.
Pole cores 9 are arranged at a predetermined pitch within the case 8, and their lower ends face the inductor magnetic poles 7 with a small air gap. The upper end of this pole core 9 is fixed to the cover plate of the case 8 via a stator yoke 10. The above pole core 9 has an armature coil 1
1 and a field coil 12 are respectively wound. The armature coil 11 is wound across two adjacent pole cores 9, whereas the field coil 12 is wound around each pole core 9.
They are wrapped one by one.

Auxiliary coils 13 are wound around the root portions of the inductor magnetic poles 7 on the rotor side facing the pole core 9, respectively, as shown in FIG. These auxiliary coils 13 are connected in series with each other, and both ends thereof are connected to a capacitor 14.

Next, the operation of the retarder made of the inductor type generator configured as above will be explained. When a vehicle equipped with this retarder is going down a long slope, for example, a retarder switch provided at the driver's seat is turned on. Then, a current flows from the battery 16 to the field coil 12 via the controller 15 shown in FIG. 2, and the field coil 12 is excited. The field coil 12 is configured to magnetize two pole cores 9 to have different polarities, and to excite a pair of pole cores 9 around which a common armature coil 11 is wound to have different polarities. I'm starting to do that.

Therefore, when the flywheel 4 is in a certain rotational position and the inductor magnetic pole 7 is in the position shown by the solid line in FIG. 3, a magnetic circuit 19 shown by the dotted line in the same figure is formed. On the other hand, when the flywheel 4 rotates by an angle corresponding to the pitch of the pole core 9 and moves to the position shown by the chain line in FIG. 3, a magnetic circuit 20 as shown by the chain line in the figure is formed. Different. Both of the magnetic fluxes passing through these magnetic circuits 19 and 20 interlink with the armature coil 11, and the directions of the magnetic fluxes are reversed. Therefore, due to this change in magnetic flux, an electromotive force is induced in the electromagnetic coil 11, and this inductor type generator generates electricity.

This means that the engine 1 or the vehicle drives the flywheel 4, and the work done at this time is used as braking force to decelerate the vehicle. Note that the power generated by the armature coil 11 is
The heat is converted into heat by the resistance in the resistance box 17 shown in FIG. In order to cool this heat, the resistance inside the resistance box 17 is
It is designed to be cooled by water passing through 8.

Further, in this inductor type generator, an auxiliary coil 13 attached to the inductor magnetic pole 7 is designed to improve the output. This auxiliary coil 13 interlinks with the magnetic flux passing through the magnetic circuits 19 and 20. This change in magnetic flux changes sinusoidally as shown by the solid line in FIG. Therefore, an output voltage as shown by the dotted line in the figure is generated in the coil 13. This voltage therefore causes a current to flow through the circuit consisting of coil 13 and capacitor 14. Since this current is phase advanced by the capacitor 14,
As shown by the chain line in FIG. 4, the phase almost coincides with the change in magnetic flux.

Therefore, the magnetic flux generated by the phase-advanced current flowing through the capacitor 14 is superimposed on the magnetic flux passing through the magnetic circuits 19 and 20, and the magnetic flux that performs the magnetizing action is connected to the capacitor 14. The magnetic flux generated by the auxiliary coil 13 improves the efficiency of the generator and increases its output.
Therefore, the control power of the retarder made of this generator can be increased. Furthermore, since this auxiliary coil 13 is short-circuited via the phase advancing capacitor 14, there is no need to connect it to an external circuit, and therefore there is no need to use brushes or slip rings. Therefore, it is only necessary to hold the capacitor 14 on the flywheel 4, which is advantageous in terms of maintenance.

Although the present invention has been described above with reference to an illustrated embodiment,
The present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention. For example, although the above embodiment relates to an inductor type generator applied to a retarder, the present invention can also be applied to an inductor type generator used for other purposes such as a high frequency generator.

As described above, in the present invention, an auxiliary coil is wound around the inductor magnetic poles on the rotor side, and both ends of the auxiliary coil are short-circuited via a capacitor, so that the phase of the magnetic flux that interlinks with the armature coil is almost the same. The present invention relates to an inductor type generator in which a short circuit current is caused to flow through the auxiliary coil.

Therefore, according to the present invention, a current whose phase is advanced by the capacitor and is almost in phase with the magnetic flux interlinking with the armature coil flows through the auxiliary coil, and the magnetic flux generated by this current is It becomes superimposed on the magnetic flux passing through the inductor pole and interlinking with the armature coil, thereby causing a magnetizing effect in the auxiliary coil. Therefore, by providing such an auxiliary coil, the efficiency of the generator is improved and the output is increased.

[Brief explanation of the drawing]

Fig. 1 is a side view of an engine equipped with a retarder constructed from an inductor generator according to an embodiment of the present invention, Fig. 2 is an external perspective view of the retarder, and Fig. 3 is a main part of the retarder. FIG. 4, a developed enlarged longitudinal sectional view, is a graph showing the action of the auxiliary coil. In addition, in the symbols used in the drawings, 4... flywheel, 7... inductor magnetic pole, 9... pole core, 10... stator yoke, 11... armature coil, 12... field coil, 13... ...auxiliary coil,
14... Phase advance capacitor.

Claims (1)

[Claims] 1 Inductor magnetic poles are provided on the rotor side, and armature coils and field coils are provided on the stator side, and the magnetic path is changed by moving the inductor as the rotor rotates. In an inductor type generator that generates power generation output by interlinking the magnetic flux that changes with the change in the armature coil with the armature coil, an auxiliary coil is wound around the inductor magnetic pole on the rotor side, and this An inductor type generator characterized in that both ends of an auxiliary coil are short-circuited via a capacitor, and a short-circuit current that is substantially in phase with a magnetic flux interlinking with an armature coil is caused to flow through the auxiliary coil.