JPS6241577Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a vehicle generator that adds a function that enables the supply of AC power to the conventional vehicle generator that supplies DC power to the battery and multiple electrical devices installed in the vehicle. It concerns the structure of the generator.

First, a conventional vehicle generator will be explained with reference to FIG.

In the figure, reference numeral 1 denotes a field, which includes opposed magnetic poles 1a and 1a forming N and S different poles in the circumferential direction, a field winding 1b that magnetizes the opposed magnetic poles 1a, and the field winding. It is composed of a field core 1c installed inside the wire 1b. A rotating shaft 2 is inserted into the field 1, and both ends of the rotating shaft 2 are supported by bearings 3 and 4. A pair of slip rings 5 are fixed to the rotating shaft 2 and are connected to the field winding 1b. 6
7 is a brush that slides into contact with the pair of slip rings 5; 7 is a brush holder that holds the brush 6;
Reference numeral 8 denotes an armature, which includes an armature core 8a disposed opposite to the field 1 through a minute gap, and an armature winding 8b wound around the armature core 8a in a three-phase star shape.
It consists of 9 is a rectifier for full-wave rectification of the AC output generated in the armature winding 8b; 10 is a fan fixed to the rotating shaft 2 together with 12 by a nut 11; and 13 is a rectifier that connects the bearing 3 and one end of the armature 8. 14 is a rear bracket for mounting the bearing 4, armature 8, brush holder 7, and rectifier 9; 15 is a voltage regulator; Stored. Reference numeral 16 indicates a DC output terminal, and reference numeral 17 indicates a vehicle generator constituted by the above-mentioned parts.

Next, the vehicle generator 1 configured as described above will be described.
Fig. 2 shows an electrical circuit diagram when 7 is mounted on a vehicle. In the figure, 18 is an auxiliary rectifier for supplying excitation current to the field winding 1b, 19 is an initial excitation terminal for passing an initial excitation current, 20 is an indicator light,
21 is an initial excitation resistor connected in parallel to the indicator light 20, 22 is a key switch, 23 is a battery,
24 is a DC load such as a DC motor or a lamp.

Next, the operation of the device configured as described above will be explained.

First, when the key switch 22 is closed, an excitation current is supplied from the battery 23 to the field winding 1b via the indicator light 20 and the initial excitation resistor 21. At this time, the indicator light 20 lights up to indicate the non-charging state, that is, the excitation current is being supplied from the battery 23. On the other hand, although not shown, when the vehicle engine is started and the field 1 is driven by the belt, a rotating magnetic field is generated, a predetermined AC output is generated in the armature winding 8b, and this AC output is rectified. The device 9 performs full-wave rectification and converts it into a DC output.

Next, when the rotational speed of the engine increases and the voltage at the initial excitation terminal 19 becomes equal to the voltage at the battery 23, no current flows through the indicator lamp 20 and the initial excitation resistor 21, the indicator lamp 20 goes out, and the vehicle Displays that the generator 17 is energized. After this, the exciting current is supplied from the armature winding 8b via the auxiliary rectifier 18. When the rotational speed of the engine further increases, DC power is supplied via the DC output terminal 16 to the battery 23 of the vehicle and a DC load 24 such as a DC motor or a lamp. Note that the voltage at the DC output terminal 16 is maintained at a predetermined value by turning on and off the excitation current supplied to the field winding 1b by the voltage regulator 15.

By the way, since the output of conventional vehicle generators is only DC power, such as 12V DC for gasoline cars and 24V DC for diesel cars, they have the following drawbacks.

(1) AC loads that will be installed on vehicles in the future,
For example, AC power cannot be supplied to AC defrost devices, lamps, etc.

(2) When extracting power from the vehicle for electrical appliances that require 100V AC, such as electric pots, electric stoves, electric rice cookers, etc., a special voltage converter must be used together.

(3) If you want to use the vehicle's system voltage itself without using the voltage converter described above, the electrical equipment described above must have electrical specifications that match the vehicle's system voltage.

This invention was made in order to eliminate the above-mentioned drawbacks, and it consists of a first armature winding having a predetermined number of turns and a number of turns set at a predetermined turn ratio larger than that of the armature winding. The armature is configured by a second armature winding having By directly extracting the combined AC output of the armature winding as AC output, the function of supplying DC power as before can be maintained, and at the same time, AC power can be supplied to AC loads that will be installed on vehicles in the future. In addition, the present invention is intended to supply 100 V AC electric appliances without requiring a special voltage conversion device, and to obtain such a generator for vehicles in a small size and at low cost.

FIG. 3, which shows an embodiment of this invention, will be described below.

In FIG. 3, numeral 1 denotes an opposed magnetic pole 1a that constitutes N and S different poles in the circumferential direction, and this opposed magnetic pole 1a.
a field winding 1b that magnetizes the magnetic field a, and a field core 1c installed inside the field winding 1b and wound with the field winding via a bobbin. , these fields are 2 in the axial direction of the rotating shaft 2.
It is composed of pieces juxtaposed. That is, the rotating shaft 2 is inserted into the first and second field magnets 1 configured as described above and mounted on the rotating shaft 2. Reference numeral 8 denotes an armature, which includes an armature core 8a disposed facing each of the above-mentioned fields 1 through a minute gap in the radial direction, and a three-phase star-shaped winding on the armature core 8a. A first armature winding 8b and windings having the same phase as the first armature winding 8b are connected in series,
The second armature winding 8c has a turn ratio set to n times the winding 8b and is also wound in a three-phase star shape on the armature core 8a. configured. 9 is a rectifier for full-wave rectification of the AC output generated in the first armature winding 8b; 16;
2 is a DC output terminal for taking out the output converted to DC by the rectifying device 9, and 25 is a vehicle generator constituted by the above-mentioned parts.

FIG. 4 is an electrical circuit diagram when the vehicle generator 25 is mounted on a vehicle. In the figure, 26 is an AC output terminal for taking out the combined AC output of the first armature winding 8b and the second armature winding 8c;
7 is a three-phase AC load installed on the vehicle, such as an AC defrost device, 28 is a single-phase AC load, such as lamps, installed on the vehicle, and 29 is installed at an appropriate location on the vehicle. It is a single-phase AC outlet.

Next, the operation of the device configured as described above will be explained.

First, when the key switch 22 is closed, an excitation current is supplied from the battery 23 to the two field windings 1b, 1b via the indicator light 20 and the initial excitation resistor 21. At this time, the indicator light 20 lights up to indicate the non-charging state, that is, the excitation current is being supplied from the battery 23 to the field winding. On the other hand, although not shown, when the vehicle engine is started and the field 1 is driven by the belt, a rotating magnetic field is generated, and the first armature winding 8b and the second armature winding 8c are A predetermined AC output is generated. Next, when the rotational speed of the engine increases and the voltage at the initial excitation terminal 19 becomes equal to the voltage at the battery 23, no current flows through the indicator lamp 20 and the initial excitation resistor 21, and the indicator lamp 2
0 is off, indicating that the vehicle generator 25 is excited. After this, the exciting current is supplied from the first armature winding 8b via the auxiliary rectifier 18. The rotational speed of the engine increases further,
When the rotational speed of the field 1 increases accordingly, the AC output generated in the first electric machine winding 8b is converted into a DC output by the rectifier 9, and the DC output terminal 1
6 to the vehicle's DC load 24, such as a DC motor, lamps, and battery 23, while the combined AC output of the first armature winding 8b and the second armature winding 8c is the AC output. Via the terminal 26, it is supplied to a three-phase AC load 27, such as a three-phase AC defrost device, or a single-phase AC load 28, such as a lamp. Note that the voltage regulator 15 turns on and off the field current flowing through the two field windings 1b, so that the DC output terminal 16 can be adjusted regardless of the rotational speed of the field 1 and the size of the electrical load. maintains the voltage at a predetermined value. At this time, as described above, the number of turns of the second armature winding 8c is changed to the number of turns of the first armature winding 8c.
Since it is set to n times the number of turns of b, if the line voltage of the first armature winding 8b is V, the line voltage at the AC output terminal 26 is (n+1)V.
Therefore, by appropriately setting the above turns ratio n, the line voltage at the AC output terminal 26 can be maintained at approximately 100V AC. Thus, DC power controlled to a predetermined voltage value is supplied from the DC output terminal 16, and AC power controlled to 100V AC is supplied to the respective electrical loads from the AC output terminal 26. Furthermore, since 100V AC can be obtained from the single-phase AC outlet 29 installed at a suitable location on the vehicle, general electric appliances such as electric pots, electric stoves, electric rice cookers, electric soldering irons, etc. can be used.

In the above embodiment, a vehicle generator with a built-in voltage regulator 15 was described, but the same effect can be obtained even when the voltage regulator 15 is installed separately from the vehicle generator. Further, in the above embodiment, the first armature winding 8b and the second armature winding 8c are both three-phase, but the present invention is not limited to this. The number of phases can be arbitrarily set by matching the number of phases with the armature winding 8c.

As described above, in the vehicle generator according to this invention, the first and second fields constituted by opposing magnetic poles are axially arranged side by side on the same rotating shaft, and are placed on one armature core. A first armature winding and a second armature winding having a number of turns set at a predetermined turns ratio are wound around the first armature winding, and the first armature winding The configuration is such that the AC output obtained from the AC output is converted to DC power by a rectifier and output, and the combined AC output of the first and second armature windings is extracted as an AC output, so that the following effects can be achieved. play.

(1) The voltages at the DC output terminal and the AC output terminal can be controlled by a single voltage regulator, and a predetermined DC voltage is obtained from the DC output terminal, and the voltage at the first of the second armature winding is By appropriately setting the turns ratio n for the armature winding, 100 V AC can be obtained from the AC output terminal.

(2) Like conventional vehicle generators, batteries,
While maintaining the function of supplying DC power to ignition coils, DC motors, lamps, etc., AC power is supplied to AC defrost devices and high-voltage lamps that will be installed in vehicles in the future. It can supply electricity.

(3) By installing a single-phase AC outlet in an appropriate location on the vehicle, you can use 100V AC electrical appliances, such as electric pots, electric stoves, electric rice cookers, and electric soldering irons.

(4) Conventionally, 100V AC or 100V DC from the vehicle
A special voltage converter was used to obtain this voltage, but this converter is no longer necessary for the reason mentioned in (3) above.

(5) When using electrical equipment using DC power obtained from a vehicle as a power source, it was necessary to match the electrical specifications of the electrical equipment to the vehicle system voltage, but for the reason stated in paragraph (3) above, this was not possible. This eliminates the need for this at all, and you can use 100V AC electrical appliances as they are.

(6) Generally, the number of turns of the second armature winding is significantly larger than the number of turns of the first armature winding, which significantly hinders the workability of the winding. In the generator, the first and second field magnets are placed side by side on the rotating shaft, so the magnetic resistance is extremely reduced, so when obtaining the same output characteristics,
For vehicles that can significantly reduce the number of turns of the first armature winding and the second armature winding, significantly improving the workability of the winding, and providing both AC and DC outputs. The generator can be configured to be inexpensive and small.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional vehicle generator;
Figure 2 is an electrical circuit diagram when the conventional vehicle generator shown in Figure 1 is mounted on a vehicle, Figure 3 is a sectional view showing a vehicle generator according to an embodiment of this invention, and Figure 4 is a FIG. 4 is an electrical circuit diagram when the vehicle generator according to the invention shown in FIG. 3 is mounted on a vehicle. In the figure, 1 is a field, 1a is an opposed magnetic pole, 1
b is a field winding, 1c is a field iron core, 2 is a rotating shaft, 8
8a is an armature, 8a is an armature core, 8b is a first armature winding, 8c is a second armature winding, 9 is a rectifier, and 25 is a vehicle generator according to this invention.
Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] Opposed magnetic poles that alternately constitute different poles of N and S in the circumferential direction, a field winding that magnetizes the opposed magnetic poles, and a field winding that is located inside the field winding and winds the field winding. and a field core consisting of a first and a second field core arranged in parallel in the axial direction on the same rotating shaft.
a first armature winding having a predetermined number of turns wound on the core; a first armature winding having a predetermined number of turns wound on the core; The first armature winding and the in-phase winding are each connected in series. a second armature winding, which is connected to a connection point between the first and second armature windings, and rectifies the alternating current output obtained from the first armature winding; and an AC output terminal connected to the output end of the second armature winding to take out the combined AC output of the first and second armature windings. A vehicle generator featuring: