JPS5839241A - Generator for vehicle - Google Patents

Abstract

PURPOSE:To increase the quantity of cooling air by opposing an inductor to an element receiving an induced current coaxially with a generator inside a bracket, by fitting a generator-cooling fan to the element and by activating the inductor by an AC output of the generator. CONSTITUTION:Elements 61 and 62 receiving an induced current are provided rotatably on the rotating shaft of a generator consisting of a stator 1 and a rotor 2 generating an AC output, through the intermediary of bearings 33 and 34, and are fitted with generator-cooling fans 71 and 72. Moreover, inductors 51 and 52 are fixed inside brackets 41 and 42, opposite to the elements 61 and 62. The number of poles of these inductors is set at 1/2 or less of the number of poles of the stator 1 of the generator, and a part of the AC output of the generator is fed to the activating coils of the inductors. The quantity of cooling air can be increased by this constitution, since the speed of rotation of the cooling fan can be made higher than the speed of rotation of the generator.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a vehicle generator in which the number of revolutions of a cooling fan is increased to increase the amount of cooling air in order to improve the cooling capacity of the vehicle generator. Vehicle generators are generally configured so that the cooling fan is fixed to the rotating shaft and rotates at the same speed as the rotor, so the only way to increase the cooling air volume is to increase the outer diameter of the cooling fan. There was no way. Also, for safety reasons, it is preferable to house the cooling fan inside the generator, but since the outer diameter is small and sufficient air volume cannot be expected, it is unavoidable to install it outside using a safety bar or other means. It covered the fan I had turned on.

A conventional vehicle generator of this type will be explained with reference to FIG. In the figure, (1) is the stator around which the three-phase armature winding is wound, (2) is the rotor around which the field winding is wound, and (2) is the rotor around which the field winding is wound.
) is the bearing, (411, (6) is the drive side and non-drive side pockets that fix the fixed stator (1) and rotatably supports the rotor (2)), (7) is the rotation A cooling fan fixed to the child (2), (8) a driven pulley fixed to the rotor (2) together with the cooling fan (7), and (9) fixed to the bracket (4). It is a protective cover. Now, the rotor (2) is driven via the pulley (8) by a vehicle engine (not shown), and three-phase AC power is generated in the armature coil of the stator (1).

A cooling fan (7) that absorbs heat generated by heat loss moves cooling air in the direction of the arrow to cool the generator. As can be seen from the figure, the outer diameter of the cooling fan (7) is made larger than the outer diameter of the stator (1) to make the generator relatively smaller. The cooling fan (7) may pose a hazard to people performing adjustment work while it is rotating, so please cover it with a protective cover (9) as necessary.
was attached.

Therefore, in the conventional type, the protective cover of the safety reservoir (9
), which has the drawbacks of requiring a large number of parts, increasing assembly man-hours, and increasing the size of the device.The present invention aims to eliminate the above drawbacks and provides an excellent vehicular generator as described below. It is something.

Hereinafter, one embodiment of the present invention shown in FIGS. 2 and 3 will be explained.

In the figure, (51), □□□ smell is the above bracket ←1
), ← each having a three-phase winding fixed to the audience, the first and second windings constituting an inductor are energized by the alternating current output of the generator. 1) and 12) are the first and second inductors, respectively, which face the inductor ``1'' in the radial direction with a minute gap therebetween, and constitute an eddy current joint with the inductor ``1''. As shown, it is made of aluminum. ff11%ffη are the first and second induced elements I11, the first and second cooling fans integrally fixed with the fan, (!13) and ('14) are the rotor (! 2) A bearing that rotatably supports the above-mentioned inductor (62) on the shaft of (100) &:I:J:, the electric machine of (1), and the AC of the child coil. A rectifier (200) for rectifying the output; a voltage regulator (200) for controlling energization to the field coil of the rotor (2) to maintain a constant output voltage of the armature coil; (800) a battery; , (400
) is Ki-Nuitchi. When the rotor (2) is driven via the pulley (8), a three-phase alternating current is generated in the stator (1), and this is transferred to the first and second three-phase alternating current, which are electrically connected to each other. Three-phase power is supplied to the winding O'ill, (Incorporated) to generate a rotating magnetic field, and an eddy current itv is formed between the inductor and the induced element 6'4, and an electromagnetic force is generated. 021 is rotated.

For example, if the number of poles of the armature winding of the generator is 12 poles, and the first and second windings of the conductor are 4 poles, then the rotating magnetic field of the latter is The synchronous speed is 8 times the former synchronous speed.Therefore, the first and second induced children are 1
), (6 is driven at a synchronous speed 8 times faster than the generator rotor (1), which also rotates at 3 times the speed if we ignore everything, and a cooling fan σ1 coupled to it), (H ) can send approximately three times as much wind Jtk as the cooling fan of a conventional generator. Therefore, even if the outer diameter of the cooling fan is made smaller and installed inside the bracket Ill, f42,
With a large outer diameter, the bracket (41) can obtain a larger air volume than the Iolena cooling fan, and the protective cover (9) that was previously required is no longer required.
This has an excellent effect in that the space around the vehicle engine can be used effectively.

Generally, the output of a generator is proportional to the magnitude of the electromagnetic force of the rotor (2). The magnetomotive force decreases. In order to reduce this attenuation, it is necessary to apply cooling air to the surface of the rotor (2). For example, if the number of poles of the first winding (5υ) in an inductor is selected to be smaller than the number of poles of the second winding, the first cooling fan ff
Since the l+ rotates at a higher speed than the second cooling fan (c), the difference in wind pressure on both sides of the rotor (2) is larger than in conventional generators, and therefore the wind passing through the outer peripheral surface of the rotor (2) is larger. Since the cooling air Fjk increases, the decline in magnetomotive force can be reduced.

In addition, in the above example, an eddy current joint is used as a member that is energized by a part of the output of the vehicle alternator to drive the cooling fan (7), but It is also possible to form a magnetic material υ and configure a hypothetical joint to drive it.

In addition, in the above explanation, two cooling fans tI++, ff2
Although a configuration in which the cooling fans rotate independently has been shown, it goes without saying that a considerable effect can be obtained even if one of the cooling fans is fixed to the shaft of the rotor (2).

As described above, the present invention includes an inductor fixed to the inner peripheral part of the bracket and having a multi-pole energizing coil, and an inductor rotatably provided on the rotating shaft so as to face the inductor through a small gap. An inductor that is connected to each other by electromagnetic force during power supply, and a replaceable coil that is radially opposed to the rotor and has a number of poles that is 11 times twice the number of poles of the inductor. The stator, which has a heavy mechatronic winding that generates an AC output that can be used to supply power to Since the cooling fan that cools the rotor can be housed in the bracket without increasing the size of the rotor, there is no need for a protective cover like in the past, and the cooling fan has a sufficient air volume. 1+, it is possible to effectively utilize the narrow space of the engine wheel and obtain a large external output.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing a conventional TLF dual-use generator +1ri, Fig. 2 is a side sectional view of a vehicle generator showing an embodiment of the present invention, and Fig. 8 is an embodiment shown in Fig. 2. FIG. In the figure, (1) is the stator, (2) is the rotating shaft, (31), (a) is the bearing, (41) is the drive side bracket, M2 is the counterdrive t (h side placket, wholesale), My sister is the 11th
(2nd three-phase winding, all), (6 is the first and second inductor, ff11, (72 is the 11th and 2nd cooling fan. In addition, the same reference numerals in the figure are the same or equivalent. Parts are shown. Agent: Makoto Kuzuno (and 1 other person) Figure 1

Claims (1)

[Claims] a rotor fixed to a rotating shaft and having a field winding; a bracket concavely surrounding the rotor and rotatably supporting the rotating shaft;
A multi-pole biasing coil p is fixed to the inner circumference of this bracket.
an inductor which is rotatably provided on the rotating shaft so as to face the inductor through a small gap, and which is coupled to the inductor by electromagnetic force when power is supplied to the energizing coil; , provided radially opposite to the rotor,
a stator having an armature winding having a number of poles more than twice the number of poles of the inductor and generating an alternating current output capable of feeding power to the energizing coil; Vehicle generator with cooling fan provided.