JPS6335152A - Prime mover driven generator - Google Patents

Abstract

PURPOSE:To facilitate the maintenance and inspection of a generator itself and at the same time to dispense with a flywheel and to make the generator of a small-sized and lightweight, by fixing a bottomed hollow cylindrical field iron core to the rotating shaft of a prime mover, and by providing an armature core and a field winding inside the field iron core. CONSTITUTION:An engine rotating shaft 2 is provided to a Diesel engine 1. The bottom of a bottomed cylindrical field iron core 3 is fastened to this engine rotating shaft 2 with bolts 4. A shaft 7 is fixed to a stand 6 fixed and installed on to a common baseplate 5. An armature core 10 wound around with an armature winding 9 and a field winding 11 are provided to this shaft 7. When magnet field is generated by electrifying the field winding 11 and starting the Diesel engine 1, the flux 20 flows through a magnetic path composed of the shaft 7 and field core 10. It passes from the magnetic poles 3A and 3B of the field core 3 to the armature winding 9, armature core 10 and shaft 7, so that the electricity is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a prime mover drive power generator, and more particularly to a prime mover drive power generator that is brushless and bearingless, thereby significantly reducing maintenance and inspection.

[Conventional technology]

Conventional motor-driven power generators of this type were
As described in "Diesel Generator for Parking Sites," published by Ohm Publishing Co., Ltd. in 1982, it is generally a rotating field type generator. However, in the case of a rotating field type power generator, as can be seen from the structure, the field core and field winding are provided on the rotating shaft, and the mechanical strength such as centrifugal force during rotation is Although various measures have been taken for the field windings etc. to make the generator more durable, no consideration has been given to simplifying the structure of the generator.

[Problem that the invention seeks to solve]

Therefore, according to the above-mentioned prior art, there is a problem in that consideration is not given to the reduction in size and weight of the generator structure and maintenance and inspection.

SUMMARY OF THE INVENTION An object of the present invention is to provide a motor-driven power generating apparatus that facilitates maintenance and inspection of the generator itself and can be made smaller and lighter by eliminating the need for a flywheel.

[Means for solving problems]

To achieve the above object, the present invention has a field winding and an electromagnetic winding and generates electricity by being driven by a prime mover, in which a field iron core in the shape of a hollow cylinder with a bottom is fixed to the rotating shaft of the prime mover so as to be rotatable. , is characterized in that an armature core and a field winding are installed inside the field core, in which the armature winding is wound around a fixed shaft that does not rotate.

[Effect]

In a power generation device driven by a prime mover, a field winding and an armature winding are provided on the same fixed shaft, and a magnetic path from the generator field iron core to the prime mover shaft receives the magnetic field generated by the field winding. A rotating magnetic field is generated by rotating the magnetic path. This rotating magnetic field is applied to a fixed armature winding to generate an electromotive force from the armature winding. Therefore, according to this power generation device, maintenance and inspection are easy because it has a bearingless structure, and because only the field core of the magnetic path rotates, a flywheel effect can be achieved, and the structure of the field winding is simple. Therefore, one power generation device can be made lighter and smaller.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a longitudinal cross-sectional view showing a diesel engine power generator as an example of an embodiment of the prime mover drive power generator according to the present invention, and FIG. 2 is a cross-sectional view taken along the line ■--■ in FIG.

In these figures, a diesel engine 1 is provided with an engine rotation shaft 2.
A bottom portion of a cylindrical field core 3 with a bottom, which serves as a magnetic path for forming a rotating magnetic field, is fastened with a bolt 4 .

A shaft 7 is fixed with bolts 8 to a stand 6 fixed and erected on a common platform 5 of the diesel generator, and an armature core 10 having an armature winding 9 wound thereon is fixed to the shaft 7. and a field winding 11 are provided.

The field core 3 has a hollow cylindrical shape with a bottom, and has a substantially mouth-shaped cross section as shown in FIG. 1. As shown in FIG. Magnetic poles 3A and 3B facing the armature core 10 are formed.

The operation of the power generating device having such a configuration will be explained.

Here, when a current is applied to the field winding 11 to generate a magnetic field and the diesel engine 1 is started, a magnetic flux 20 is generated as shown by the arrow in FIG. It flows through the magnetic path consisting of the magnetic core 10, and as shown in FIG. Power is generated by passing through a magnetic path called shaft 7.

According to this embodiment, as shown in Fig. 1, the bearings that are necessary for a rotating field type generator can be completely eliminated, so maintenance and inspection of the generator itself is greatly reduced. will be done. Further, according to this embodiment, the field core 3 has a structure as shown in the figure, and a flywheel effect can be achieved, thereby eliminating the need for a flywheel, which was conventionally required.

Further, according to this embodiment, the structure of the field winding 11 is simple, and since neither the field winding nor the armature rotates and is of a stator type, there is no restriction due to mechanical strength.

Therefore, one generator can be made lighter and smaller.

〔Effect of the invention〕

As described above, according to the present invention, the generator field core can have the effect of a flywheel, so the conventionally provided flywheel is no longer required, and the field winding is mounted on the fixed shaft. Since there is no need to consider the effects of rotation, it is possible to create a highly reliable field winding.Moreover, the bearingless structure greatly reduces maintenance and inspection of the generator itself, and also reduces the need for generator maintenance. It has the effect of being smaller and lighter.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of a motor-driven power generator according to the present invention, and FIG. 2 is a cross-sectional view taken along the line ■--■ in FIG. 1...Diesel engine, 2...Engine rotation shaft. 3... Field iron core, 5... Common platform, 6... Stand, 7... Shaft, 9... Armature winding, 10...
・Armature core, 11... Turning winding, 20... Magnetic flux.

Claims (1)

[Claims] 1. In a device that has a field winding and an armature winding and generates electricity by the driving force of a prime mover, a field core in the shape of a hollow cylinder with a bottom is fixed to the rotating shaft of the prime mover so that it can rotate. 1. A prime mover drive power generating device characterized by having an armature core and a field winding in which an armature winding is wound around a fixed shaft that does not rotate inside.