JPS63148837A - 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 [Field of Industrial Application] The present invention relates to a power generation device for a vehicle that can supply electric power with two voltage systems as required.

[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 including 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 set to a predetermined voltage so that it is output at a constant voltage. Equipped with a regulator. 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 be operated for a short period of time until the vehicle's engine is sufficiently warmed up, for example 5 to 10 minutes after the engine has started, 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, the characteristics of the above heating element,
In order to reduce losses in wiring and switches, the applied power is several times higher than the battery system voltage mentioned above, and the current is suppressed, using an independent power source separate from the electric circuit including the battery. and an electric circuit. Conventionally, electric heating elements for ice melting or auxiliary heating equipment are used in dedicated generators that are separate from the Jitun generator for battery charging, or that share the casing and drive shaft with the charging generator. A system has been proposed in which a power generating element and two electrical circuit systems are mechanically integrated. For example, the latter is
Publication No. 6-112866 or Utility Model Application No. 57-425
This is shown in Publication No. 65, and has two sets of armatures and fields as a power generation device for charging (low voltage) and high voltage load, and is integrally configured with a common casing and drive shaft. .

[Problems to be Solved by the Invention] As described above, the conventional vehicle power generator that requires two voltage systems essentially needs to configure two generators, one for charging and one for high voltage load. However, it had the drawbacks of high cost and large weight and volume. 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. It has the disadvantage of becoming.

This invention was made to solve the above-mentioned problems, and it has the same volume and stacking 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 vehicle power generation device according to the present invention includes a first armature coil and a second armature coil having a larger number of turns than the first armature coil connected in parallel to one armature core of a charging generator, A first and second redundancy device for rectifying the output of each of the above-mentioned [k-child coils] is provided, a common field coil for the two armature coils, and a voltage regulator for adjusting the current of this field coil. and the first rectifier output terminal is connected to the battery charging circuit of the vehicle, and the second rectifier output terminal is connected to a switching switch that connects the first rectifier output terminal and either the high voltage load. It is.

[Effect]

In this 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 are arranged so that the switching switch is switched to the high voltage load side according to the needs of the high voltage load. If connected, it supplies power with a high voltage output, and if connected to the first rectifier output end, it supplies power to the battery charging circuit with an output corresponding to the parallel connection of the first armature coil and the second armature coil. .

[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 '#et wires are wound in parallel on the same armature core.
(4) and (5) are the first rectifier and second rectifier for three-phase full-wave rectification of the output of each armature coil, and (6) is for creating the rotating magnetic field of the generator (1). field coil (7) is the current to the field coil (6).
This is a voltage regulator that adjusts based on the output voltage of the rectifier.

The configuration of the voltage regulator (7) is as follows: H is a transistor that turns the field coil (6) on and off;
base resistance, (731 is a driver transistor that controls the on/off of the transistor υ, (741, (71 is a voltage dividing resistor that divides the output terminal voltage of the first rectifier (4),
<7Q is a voltage dividing resistor (74, a zener diode that detects the divided potential of ff1l and becomes conductive when it exceeds a predetermined value, - is connected in parallel to the field coil (6) and is connected to the field coil (6).
) is a diode that absorbs intermittent surges. (8) is the battery mounted on the vehicle, (9) is the low-range positive load of the vehicle, and αO is a key switch that is linked with the vehicle engine start switch and energizes the pace resistor of the voltage regulator (7). , Ql) is a high-voltage load that requires high-voltage power such as a vehicle window glass ice melting device or an auxiliary heating device, and (2) is a second
αJ is a switching switch configured to connect the output end of the rectifier (5) to either the output end of the first rectifier (4) or the high voltage load (b), and αJ is the switching switch (2). This is a switch that controls and opens and closes the supply of electricity to the high voltage load (b).

The operation of one embodiment of the present invention configured as described above will be explained. When the key switch OQ is turned on, the transistor (71) is turned on from the battery (8) through the base resistor (c) of the voltage regulator (7), and the field coil (
6) is excited, and when the vehicle engine is started from this state, the generator (1) is driven and a voltage is induced in the first and second armature coils (2+, (3). First, when the switching switch 4 is connected as shown in Fig. 1, that is, when the switch αJ is OFF and the high voltage load 01) is not used, the output terminal of the second rectifier (5) is connected to the first rectifier (4). Since it is connected to the output terminal, the FJt machine (1) is the first
゜The second armature coil (21, (3) and the first and second rectifiers (4) and (5) act in parallel to output to the charging circuit of the battery (8). Generator (1
) is adjusted to a predetermined value by the next operation of the voltage regulator (7). That is, the generator (
When the output voltage of 1) becomes higher than the predetermined value u, the voltage dividing resistor V41.

The voltage division point potential of σG makes the zener diode conductive, turning on the transistor (support), which turns off the transistor υ, which cuts off the energization of the field coil (6) and reduces the field strength. When the voltage decreases, the output voltage of the generator (1) is lowered, and conversely, when it becomes lower than a predetermined value, Zener diode 4 becomes non-conductive.
Transistor FJ is OFF, )-transistor T:III
is turned on and acts to energize the field coil (6) and increase the output voltage, so that by repeating this, the output voltage of the generator [m (1)] is controlled to a predetermined constant value.

Next, when using high voltage load αυ, when switch a3 is turned on, the second rectifier (5) is activated by the switching switch @.
The output end of the rectifier (4) is separated from the output end of the first rectifier (4) and connected to the high voltage load a◇. In this case, the second armature coil (3) has several times more turns than the first yuzu coil (2), and since the field is common, the generated voltage is multiplied. Therefore, a high voltage is supplied from the second rectifier (5) to the high voltage load αη, and the output from the first rectifier (4) to the charging circuit of the battery (8) is controlled by the voltage regulator (7). The operation works in the same way to adjust the predetermined output voltage. In addition, in this state, the battery (8)
The output to the charging circuit is reduced to only the power generated by the first armature coil (2), but as mentioned above, this type of high voltage load (II) is used for a short time. ,
The battery (8) will not be over-discharged. Also, the voltage value of the high voltage output on the second rectifier (5) side is the same as the high voltage load α
The impedance of υ is set in advance and does not change, and by appropriately designing the number of turns of the second armature coil, there will be no inconvenient fluctuations in use even without special control.

In the above embodiment, the switching switch (6) 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. This has the effect of reducing the amount and volume of M, making it cheaper. At the same time, all of the power generating elements work effectively as output for low voltage loads, except when outputting for high voltage loads for short time applications, resulting in highly energy efficient vehicles. A power generation device for use 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, Q sword is the high voltage load,
(To) is a switching switch, and (To) is a switch.

Claims (1)

[Claims] a first armature coil wound around a common armature core of the generator and connected in parallel to each other; a second armature coil having a larger number of turns than the first armature coil; a common field coil for the first and second armature coils, a voltage regulator for adjusting the current of the field coil, and a voltage regulator for adjusting the current of the field coil. A power generator for a vehicle, comprising a switching switch that connects a first rectifier output terminal to a battery charging circuit of the vehicle, and connects the second rectifier output terminal to either the first rectifier output terminal or a high voltage load. Device.