JPS63167642A - Vehicle generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] Jin's invention relates to a power generation device for a vehicle that can supply power with two voltage systems as needed.

[Conventional technology]

Generally, a vehicle is equipped with a battery as a power source for the electrical load and a charging generator for charging the battery. The voltage of the electric circuit that includes this battery is a predetermined voltage that takes into consideration appropriate charging performance with respect to the system voltage of the battery, and the output voltage of the charging generator is adjusted so that it is output at a predetermined constant voltage. Equipped with equipment. In recent years, automobiles in particular have been equipped with devices that quickly melt ice on window glass in cold weather, auxiliary heaters that warm engine cooling water, or seat heaters to improve cabin comfort and comfort. The demand for this is increasing. These equipment only need to operate for a short period of time until the vehicle's engine is sufficiently warmed up, for example 6 to 10 minutes after the engine starts, but since they require a large amount of heat, the power required to supply the heating element is also 1. It is large, about ~2KW.

In addition, due to the characteristics of the heating element and to reduce losses in wiring and switches, the applied power is several times higher than the system voltage of the battery, and the current is suppressed.
It has an independent power supply and electrical circuit that is separate from the electrical circuit that includes the battery.

Conventionally, as a power source for the electric heating element of such ice melting or auxiliary heating equipment, a dedicated generator separate from the charging generator for battery charging, or a charging generator using a common casing and drive shaft to generate electricity. A system in which the element and two electrical circuit systems are mechanically integrated has been proposed. For example, the latter is published in Japanese Unexamined Patent Publication No. 56-112866 or Japanese Utility Model Application No. 57-4.
It is shown in Publication No. 2565, and has two sets of armatures and fields as a power generation device for charging (low voltage) and high voltage load.
The casing and drive shaft are integrated into one unit.

[Problem that the invention seeks to solve]

Conventional vehicle power generators that require two voltage systems essentially require two generators, one for charging and one for high-voltage loads, resulting in high costs and large weight and volume. It had some drawbacks.

In addition, as mentioned above, the generator on the high-voltage load side is only needed for a limited time and operates without load most of the time, which is also uneconomical and causes energy loss to the vehicle engine. There was a drawback.

This invention was made to solve the above problems.It has the same volume and weight as one normal charging generator, and can be used for battery charging (low voltage) and high voltage as needed. The purpose of this invention is to obtain a power generation device for a vehicle that can output two voltage systems for loads at a relatively low cost.

[Means for solving problems]

The vehicular power generation device according to the present invention includes a first armature coil and a second heavy armature coil having a larger number of turns than the first armature coil, arranged in parallel in one armature core of a charging generator. , first and second rectifiers are provided to rectify the output of each of the armature coils, and a common field coil for the two armature coils is provided, and a voltage regulator is provided to adjust the current of the field coil. and a switching switch that connects the first rectifier output terminal to the battery charging circuit of the vehicle and switches whether the second rectifier output terminal is connected in parallel with the first rectifier or in series with the high voltage load. It has been established.

[Effect]

In the present invention, the first armature coil and the first rectifier supply power to the battery charging circuit, and the second armature coil and the second rectifier supply power to the battery charging circuit. If connected in series to the high voltage load side, it will supply power with a high voltage output, and if connected in parallel with the first rectifier, it will provide an output corresponding to the parallel connection of the first armature coil and the second armature coil. to supply power to the battery charging circuit.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, (1) is a generator driven by a vehicle engine (not shown), (2) is a first armature coil with three-phase winding, and (3) is a winding from the first armature coil (2). a large number of second armature coils wound in parallel on the same armature core; (4) and (5) a first rectifier and a second rectifier for three-phase aftereffect rectification of the output of each armature coil; (6) is a field coil for creating the rotating magnetic field of the generator (1);
) is a voltage regulator that adjusts the current to the field coil (6) based on the output voltage of the first rectifier.

The configuration of the voltage regulator (7) is as shown below, where fl is a transistor that turns on and off the field coil (6), 2 is the base resistance of the transistor vυ, and (2) is the transistor g.
Driver transistor that controls the on/off of υ, axis.

4 is a voltage dividing resistor that divides the output terminal voltage of the first rectifier (4), koji is a voltage dividing resistor, and a zener diode that detects the divided voltage potential and becomes conductive when it exceeds a predetermined value. , the sub is connected in parallel to the field coil (6).
) is a diode that absorbs intermittent surges. (8) is the battery mounted on the vehicle, (9) is the vehicle's low voltage load, and α is the key switch that is linked to the vehicle engine start switch and energizes the base resistor of the voltage regulator (7). , (b) is a high-voltage load that requires high-voltage power, such as a vehicle window glass ice melting device or an auxiliary heating device. ) is configured so that it can be connected in parallel or in series to a high voltage load. This is a switch that opens and closes the energization.

The operation of one embodiment of the present invention configured as described above will be described. When the key switch a1 is turned on, the transistor (7υ) is turned on from the battery (8) through the base resistor (2) of the voltage regulator (7), and the field coil (6) is turned on.
is excited, and when the vehicle engine is started from this state, the generator (1) is driven, and the first and second armature coils (
2) A voltage is induced in (3). Here, first, the changeover switch (2) is connected as shown in the figure, that is, the switch (
) is OFF and the high voltage load On is not used, the output terminal of the second rectifier (5) is connected in parallel to the output terminal of the first rectifier (4), so the generator (1) is 1゜second
armature coils (2), (3), and the first. The second rectifier (4) e (5) acts in parallel to connect the battery (
8) Output to the charging circuit. At this time, the output voltage of the generator (1) is adjusted to a predetermined value by the next operation of the voltage regulator (7).

That is, when the output voltage of the generator (1) becomes higher than a predetermined value, the voltage dividing point potential of the voltage dividing resistor (741, fl) makes the Zener diode 175 conductive, and the transistor (C) turns O
N, the transistor ffl turns OFF L/ to cut off the current to the field coil (6), and the strength of the field decreases, lowering the output voltage of the generator (1), and conversely, when it becomes lower than a predetermined value. Zener diode fff1 is non-conducting, transistor (
C) is OFF and the transistor direction is ON, which acts to energize the field coil (6) and increase the output voltage, so by repeating this process, the output voltage of the starter (1) remains constant. Controlled by value.

Next, when using a high voltage load (2), when switch 0 is turned on, the switching switch (to) switches the second rectifier (
The output end of 5) is connected in series with the first rectifier (4),
Its series output is connected for high voltage loads.

In this case, the second armature coil (3) is at least
Since the number of turns is larger than that of the armature coil (2), and the field is common, the first. The voltage generated at the series outputs of the second rectifiers (4), (5) will be two to several times higher than the voltage regulated by the voltage regulator (7). Therefore, a high voltage is supplied from the series output terminal to the high voltage load (b), and
The output from the first rectifier (4) to the charging circuit of the battery (8) is regulated to a predetermined output voltage in the same way as the voltage regulator (7) described above. In this state, the output of the battery (8) to the charging circuit is reduced to only the power generated by the first armature coil (2), but as mentioned above, the use of this type of high voltage load αD Since the time is short, the battery (8) will not be over-discharged. Also, jI! on the second rectifier (5) side! ? ! The voltage value of the pressure output does not change because the impedance of the high voltage load Q is set in advance, and by appropriately designing the number of turns of the second armature coil (3), it can be avoided even if it is not particularly controlled. There is no change.

In the above embodiment, the switching switch (2) and the switch (to) were constructed of mechanical components, but they may also be formed of semiconductor element circuits, and the relationship with the generator (1) may be separate or integrated. .

Furthermore, in the above example, the voltage regulator (7) detects the voltage of the charging circuit for the battery (8) and controls the current flowing through the field coil (6), but it may also include an auxiliary rectifier. If so, the current flowing through the field coil (6) can be controlled based on the output voltage of this auxiliary rectifier.

〔Effect of the invention〕

As described above, according to the present invention, a generator that outputs two voltage systems, one for high-voltage loads and one for low-voltage loads including battery charging, as needed, is configured with one conventional charging generator. It has the effect of being able to reduce weight and volume, making it cheaper, and all of the power generation elements work effectively as output for low-voltage loads, except when outputting for high-voltage loads for short-term applications, making it a highly energy-efficient vehicle power generator. A device is obtained.

[Brief explanation of the drawing]

The drawing is a circuit diagram of a vehicle power generator according to an embodiment of the present invention. In the figure, (1) is the generator, (2) is the first armature coil,
(3) is the second armature coil, (4) is the first rectifier,
(5) is the second rectifier, (6) is the field coil, (7) is the voltage regulator, (8) is the battery, (b) is the high voltage load, @ is the switching switch, and Q3 is the switch. .

Claims (1)

[Claims] The first windings are each wound in parallel on a common armature core of the generator.
an armature coil, a second armature coil having a larger number of turns than the first armature coil, first and second rectifiers that rectify the outputs of the first and second electrode coils, respectively; a common field coil for the first and second armature coils;
A voltage regulator that adjusts the current of the field coil, and an output end of the first rectifier are connected to a battery charging circuit of the vehicle, and an output end of the second rectifier is connected in parallel with the first rectifier. A vehicle power generator equipped with a switching switch that switches whether it is connected to a high-voltage load in series or connected to a high-voltage load.