JPH05292717A - Multi-power source alternator - Google Patents

Abstract

PURPOSE:To provide a multi-power source alternator which stably supplies a plurality of different output voltages. CONSTITUTION:A multi-power source alternator has a plurality of generating windings 2-1, 2-2, 2-3, rectifiers 3 for converting alternating currents generated in a windings 2-1, 2-2, 2-3 into DCs direct currents, and one regulator 5 for outputting 6V, 12V, 24V series DC voltages. The regulator 5 controls a detection voltage source for detecting an output voltage for a constant voltage and an exciting current supply source for supplying exciting currents to exciting windings 4 by different voltages.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-source alternator,
In particular, a multi-source alternator including a plurality of power generation windings and a rectifying unit for converting alternating current generated in these power generation windings into direct current and generating a plurality of direct current voltages having different voltages with one regulator The present invention relates to a multi-power source alternator that outputs a stable voltage.

[0002]

2. Description of the Related Art A conventional automobile generator, that is, an alternator and its regulator has the structure shown in FIG.

In the figure, reference numeral 1 is an alternator with a rectifier, and the AC voltage generated in the generator winding 2 is rectified by a rectifier unit 3.
It is configured so that it is converted into a direct current and a direct current voltage is output. The exciting winding 4 is for the power generating winding 2, and the exciting current flowing through the exciting winding 4 is controlled by the regulator 5 to make the output voltage of the alternator 1 a constant voltage.

That is, when the output voltage of the alternator 1 rises, the constant voltage diode 9 is turned on, so that the transistor 15 is turned on and the Darlington-connected transistor 8 is turned off, so that the exciting current flowing through the exciting winding 4 is changed. It is cut off, and the output voltage of the alternator 1 drops.

On the contrary, when the output voltage of the alternator 1 drops, the constant voltage diode 9 is turned off, so that the transistor 15 is turned off and the Darlington-connected transistor 8 is turned on, so that the exciting current is supplied to the exciting winding 4. It continues to flow and is controlled so as to raise the output voltage of the alternator 1.

The DC voltage generated in the alternator 1 charges the battery 6 via the switch 7 and supplies the electric power to the electric components (not shown). By the way, as the automobile becomes more sophisticated, the operating voltage of the electrical components mounted on the vehicle is also increased, and 6V from the alternator is used.
There is a growing demand for DC output voltage generation of 12V system, 12V system and 24V system.

FIG. 4 shows a configuration diagram of a conventional multi-power source alternator, and reference numerals 1, 3, 4, 5, and 7 correspond to those of FIG. 2-1 to 2-3 are power generation windings, 6-
1, 6-2 are batteries, 10 is a stator, and 11-1 to 11-3 are output terminals.

Three power generating windings 2-1 to 2-3 are wound in parallel on the stator 10, and an AC voltage generated in the 24 V power generating winding 2-1 is provided correspondingly. It is converted into direct current by the rectifier 3 and is output to the output terminal 11-1 as 24
It is designed to output a V system DC voltage. The AC voltage generated in the 6V power generation windings 2-2 and 2-3 is converted into DC by each rectifying unit 3 provided correspondingly, and the 6V DC voltage based on the power generation winding 2-3 therein. Is output terminal 11-
The DC voltage of 12V which is output to the output terminal 11-2 and output to the output terminal 11-2 is two 6V based on the power generation windings 2-2 and 2-3.
It is generated by connecting the DC voltage of.

These 6V, 12V and 24V DC voltages are made constant by detecting an output voltage of 12V by the regulator 5 and controlling the exciting current flowing through the exciting winding 4.

As a system for outputting a plurality of different DC voltages with a constant voltage by one alternator, one using a transformer (JP-A-2-168822), DC-D
Using a C converter (JP-A-1-126136)
No.), which is provided with a voltage changeover switch and changes over according to the operating voltage of the load (Japanese Patent Laid-Open No. 64-39236).
By a para-run alternator (Japanese Patent Laid-Open No. 2-175
354) and so on.

[0011]

In the conventional device shown in FIG. 4, the same voltage is used as the detection voltage detected by the regulator 5 and the excitation voltage for supplying the excitation current to the excitation winding 4. When the exciting voltage is V, the resistance of the exciting winding 4 is R, and the number of turns is T, the magnetomotive force AT generated in the exciting winding 4 is
Since it can be expressed by AT = V / R · T, when the regulator 5 is under 12V control as shown in the figure, the exciting current value is 1/2 and the magnetomotive force is lower than that under 24V control. Therefore, it is necessary to change the winding specifications of the excitation winding 4. Further, since the exciting current becomes large, the transistor 8 having a large capacitance must be used.

Further, although the output voltage is detected for the output of 12V, the voltage is not detected for the output of 24V. Therefore, the detection is performed with the output terminal of the detected voltage. At the output terminal of the voltage that is not applied, there is a drawback that a difference occurs in the voltage stabilization, the output is not stable, and the voltage rises. All of the above-mentioned transformer type, DC-DC converter type, paralan / alternator type, and voltage changeover switch type have a complicated structure, resulting in a large system. However, the former three types, the transformer type, the DC-DC converter type, and the paralan alternator type, have the drawbacks that the weight is heavy and the cost is high.

The present invention has been made in view of the above points. The voltage detection of the regulator and the excitation voltage source to be supplied to the excitation winding are configured with different voltages, and the voltage of the system not directly detected is used. It is also an object of the present invention to provide a multi-power source alternator which is configured to indirectly detect the voltage and stabilizes the output voltage by a low-cost constant voltage power generation method.

[0014]

In order to achieve the above object, a multi-power source alternator of the present invention comprises a plurality of power generating windings and converts alternating current generated in these power generating windings into direct current. In a multi-power source alternator that includes a plurality of rectifiers and outputs 6V-type, 12V-type, and 24V-type DC voltages by a single regulator, the regulator is a detection voltage source that detects an output voltage for making a constant voltage. It is characterized in that an exciting current supply source for supplying an exciting current to the exciting winding is controlled by a different voltage.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the structure of an embodiment of a multi-power source alternator according to the present invention. In the figure, the reference numerals are the same as those in FIG. 4, and the components of the regulator 5 are also the same as those in FIG. 3. However, in FIG. 1, the connection configuration of the regulator 5 and the output voltage detection unit 12 are newly added. The configuration is different from that of FIG. 4 in that it is added.

That is, in the case of the present invention shown in FIG. 1, one end of the excitation winding 4 is connected to the 24V output line. The other end is connected to the Darlington-connected transistor 8 in the regulator 5, and the exciting current flowing through the exciting winding 4 is controlled by turning the transistor 8 on and off.

On the other hand, the detection voltage of the regulator 5 is 12V.
Is connected to a point A of the output voltage detection unit 12 that apportions the output voltage of 12V with the resistors 13 and 14 having the same high value and high resistance, and 12V directly detects the output voltage. The 24V has a two-voltage detection configuration in which the output voltage is indirectly detected via the output voltage detection unit 12.

By taking the excitation power source from the 24V line,
The excitation winding 4 has the same specifications, and 12V control can be performed without increasing the capacity of the Darlington-connected transistor 8 that controls the excitation current flowing through the excitation winding 4.

Further, since the output voltages of 12V and 24V are detected at the same time, the two output voltages are stabilized and the stable voltage supply to the load is possible. FIG. 2 shows the configuration of another embodiment of the multi-power source alternator according to the present invention.

In the case of the same figure, the power generation winding 2-1 is of 12V type, and the power generation windings 2-2 and 2-3 are of 6V type. The output voltage 12V is obtained by rectifying the alternating currents generated in the power generation windings 2-2 and 2-3 by the rectifying units 3 provided correspondingly, and connecting the direct current voltages of both of them in series.

The output voltage of 24V is obtained by further rectifying the alternating current generated in the power generation winding 2-1 by the rectifying unit 3 provided correspondingly and connecting in series with the 12V voltage. The connection configuration of the regulator 5 and the output voltage detection unit 12 is the same as that of FIG. 1, and the operation thereof is also the same, so description thereof will be omitted.

Although the above description has been made in relation to 12V and 24V, it is also valid in relation to 12V and 6V and 24V and 6V.

[0023]

As described above, according to the present invention, a plurality of output voltages having different voltages can be stably supplied by one alternator without complicated wiring.

Further, since no transformer or converter is used, the space and weight can be small, and a plurality of output voltages can be obtained at a low price without increasing the size of the device.

[Brief description of drawings]

FIG. 1 is a configuration of an embodiment of a multi-power source alternator according to the present invention.

FIG. 2 is a configuration of another embodiment of the multi-power source alternator according to the present invention.

FIG. 3 is a configuration diagram of a conventional alternator and its regulator.

FIG. 4 is a configuration diagram of a conventional multi-power source alternator.

[Explanation of symbols]

 1 Alternator 2,2-1,2-2,2-3 Generator winding 3 Rectifier 4 Excitation winding 5 Regulator 10 Stator 12 Output voltage detector

Claims (4)

[Claims] 1. A plurality of power generation windings, and a plurality of rectifiers for converting alternating current generated in these power generation windings into direct current are provided, and one regulator supplies 6V system, 12V system,
In a multi-power source alternator that outputs each DC voltage of 24V system, the regulator uses a detection voltage source for detecting an output voltage for making a constant voltage and an exciting current supply source for supplying an exciting current to an exciting winding with different voltages. A multi-source alternator characterized by being configured to be controlled by. 2. The plurality of power generation windings include one 24V power generation winding and two 6V power generation windings, each of which has a voltage of 12V.
2. The multi-source alternator according to claim 1, wherein the system is configured such that the direct currents obtained by the two 6V systems are connected in series to output respective direct current voltages. 3. The plurality of power generation windings includes one 12V-system power generation winding and two 6V-system power generation windings, and the 12V-system DC is obtained by each of the two 6V-systems. 2. The multi-power source alternator according to claim 1, wherein the 24V system is connected in series and the direct currents obtained by the two 6V system and the 12V system are connected in series to output each DC voltage. . 4. The detection voltage source is provided with a high resistance apportioning circuit for apportioning the DC output voltage of the 24V system to ½, and the apportioning point apportioned to ½ by the apportioning circuit and the above 1).
2. A DC output power supply of 2V system is connected, and the voltage at this connection point is used as a detection voltage source.
The multi-power source alternator according to any one of 3 to 3.