JPH10313545A - Control circuit for charging battery and lighting lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the stabilized lighting without the effect of a charging state. SOLUTION: A total tap 2a of a coil 2 of a generator is connected to a charging terminal CH of a charging and lighting control circuit 1. A battery 4 and a DC load 5 are connected to a battery terminal BT. A thyristor SCR1 for charging control is provided between both terminals. A charging-voltage control circuit 6, which controls the thyristor SCR1 and adjusts the charging voltage, is provided. A lamp controlling thyristor SCR2 and a head light 3 are connected to the charging terminal CH in this order so as to perform lighting by the negative voltage of the coil 2. A lighting control circuit 7, which controls the thyristor SCR2 so as to prevent the overvoltage to the head light 3, is provided. Thus, the lighting of the lamp can be perfomred only with the negative voltage that is not used for the charging of the battery. Even when the irregular charging is performed under the charging state, the lighting state is not disturbed by this effect.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charging and lamp lighting control circuit for charging a battery and lighting a lamp by an AC waveform voltage of a generator linked to an engine.

[0002]

2. Description of the Related Art Conventionally, in a motorcycle, for example, an AC waveform voltage is output by a generator rotating in conjunction with an engine, a battery is charged by the AC waveform voltage, and a headlight as a lamp is turned on. There is something.

As a battery charging and lamp lighting control circuit, there is a circuit as shown in FIG. 3, for example. In the circuit shown, all the taps (output terminals) 2a of the coil 2 of the magnet type generator are connected to the charging terminal CH of the charging and lighting control circuit 11, and the intermediate tap 2b is connected to the intermediate voltage terminal MV of the charging and lighting control circuit 11. In addition, a headlight 3 as a lamp is connected to a node between the intermediate tap 2b and the intermediate voltage terminal MV.

The charging / lighting control circuit 11 is provided with a battery terminal BT. Outside the battery terminal BT, a battery 4 and a DC load (various electric components) 5 are connected in parallel with each other. I have.

A charge control thyristor SCR1 is provided in a power supply line connecting the charge terminal CH and the battery terminal BT. The anode of the charge control thyristor SCR1 is connected to the charge terminal CH, and the cathode is connected to the battery terminal. Connected to BT. And the battery terminal BT
A charging voltage control circuit 6 is provided for detecting the voltage of the thyristor SCR1 and controlling the gate of the thyristor SCR1.

In the charging voltage control circuit 6, the charging control thyristor SCR1 is turned on when the output voltage of the generator and the voltage value of the battery are lower than a predetermined voltage (for example, about 14.5 V). The battery 4 is charged, and when the voltage is equal to or higher than the predetermined voltage, control is performed to open the charge control thyristor SCR1 to prevent overcharging, and the battery 4 is appropriately charged.

A thyristor SCR2 for lamp control is disposed between the charging terminal CH and the ground line.
Its cathode is connected to the charging terminal CH, and its anode is grounded. A lighting control circuit 12 for detecting the voltage of the intermediate voltage terminal MV and controlling the gate of the lamp control thyristor SCR2 is provided. The lighting control circuit 12 detects that the voltage on the negative side is a predetermined voltage (for example, about 13 V) or more, which is a voltage taken out of the intermediate tap 2b by dividing the output voltage of the generator. Then, control for turning on the thyristor SCR2 for lamp control is performed.

[0008]

According to the battery charging and lamp lighting control circuit constructed as described above, the magnet type generator rotates in conjunction with the rotation of the engine, and positive and negative voltages are generated from the coil 2 of the generator. The battery 4 is charged by a half-wave waveform of the positive voltage generated at the charging terminal, which is generated as an AC waveform, and a headlight is generated by the half-wave waveform of the divided positive voltage generated at the intermediate voltage terminal MV. Light 3 When a negative voltage is generated, a voltage is supplied only to the headlight 3.

Therefore, the voltage supplied to the headlight 3 (the voltage of the intermediate voltage terminal MV) has an AC waveform (a waveform of the maximum voltage value Vm determined by the intermediate tap) as shown in FIG. Since the voltage portion is also used for charging the battery 4, depending on the state of the battery 4, a part of the positive side voltage is partially removed as shown by the hatched portion in FIG. It becomes like. For this reason, the positive voltage supplied to the headlights 4 varies. This phenomenon occurs irregularly depending on the state of the battery, and when a voltage fluctuation of several cycles / second to 20 cycles / second occurs, there is a problem that the brightness of the headlight 4 is disturbed by the influence.

[0010]

SUMMARY OF THE INVENTION In order to solve such a problem and realize stable lighting without being affected by the state of charge, the present invention provides a generator that rotates in conjunction with an engine. A battery charging and lamp lighting control circuit configured to charge the battery with the AC waveform voltage output from the output terminal and to light the lamp, and adjust the positive side voltage of the AC waveform voltage to the battery. A charging voltage adjustment circuit connected between the output terminal and the battery to supply the battery; and a charging voltage adjustment circuit connected between the output terminal and the lamp to supply only the negative voltage of the AC waveform voltage to the lamp. And negative side voltage supply means.

In this manner, the positive voltage of the AC waveform voltage is used for charging the battery, and only the negative voltage is used for lighting the lamp. Thus, the lamp is charged with only the negative voltage not used for charging the battery. Lighting can be performed, and the lamp can be turned on without being affected by fluctuations in the state of charge.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to specific examples shown in the accompanying drawings.

FIG. 1 is a diagram showing a battery charging and lamp lighting control circuit for a two-wheeled vehicle to which the present invention is applied. The same parts as those shown in FIG. Detailed description is omitted. The charging lighting control circuit 1 according to the present invention has a charging terminal CH and a battery terminal BT as shown in the figure, and all taps 2a of the coil 2 of the generator are connected to the charging terminal CH as in FIG. The battery 4 and the DC load 5 are connected to the battery terminal BT. In addition, as a charge voltage adjustment circuit for the battery 4, a charge control thyristor SCR1 and a charge voltage control circuit 6 are configured in the same manner as in FIG.

And a thyristor SCR2 for lamp control.
Are provided as negative voltage supply means, the cathode of which is connected to the charging terminal CH, and the anode of which is grounded via the headlight 3. A lighting control circuit 7 is connected to the gate of the lamp control thyristor SCR2. The lighting control circuit 7 prevents an overvoltage from being applied to the headlight 3 as in the conventional example. However, when a voltage (negative side) equal to or higher than a predetermined value is detected, the lamp control thyristor SCR2 is opened. Perform control.

According to the control circuit thus configured, the battery 4 is charged by the positive voltage as in the conventional circuit, and the headlight 3 is turned on by the negative voltage. That is, the control for charging is performed in the same manner as in the conventional example, and the control for turning on the headlight 3 is performed as described above.
Is connected, only the current on the negative side flows through the headlight 3, whereby the headlight 3 is turned on.

Therefore, depending on the state of the battery 4, FIG.
Even when irregular charging is performed as shown by the positive side voltage waveform, the positive side voltage is not used for lighting the headlights 3 and the negative side voltage not used for charging (hatched in the figure). As a result, the headlight 3 is turned on, so that the brightness is not disturbed.

Note that the lighting voltage is not taken out from the intermediate taps but is taken out from all taps 2a because the positive voltage is not used for lighting the headlight 3 unlike the conventional example. Therefore, the maximum voltage value Vh
Is higher than the divided voltage value Vm at the intermediate tap, the half-wave of only the negative voltage can be sufficiently compensated for.
There is no hindrance to the brightness.

[0018]

As described above, according to the present invention, the positive voltage of the AC waveform voltage is used for charging the battery, and only the negative voltage is used for lighting the lamp. The lighting of the lamp can be performed only by the side voltage, and even if irregular charging is performed depending on the charging state, the lighting state is not disturbed by the influence. In addition, since they are controlled independently of each other, the charging and lighting control can be optimized without being affected by the state of each other.

[Brief description of the drawings]

FIG. 1 is a diagram showing a motorcycle battery charging and lamp lighting control circuit to which the present invention is applied.

FIG. 2 is a voltage waveform diagram showing lighting control according to the present invention.

FIG. 3 is a diagram showing a conventional battery charging and lamp lighting control circuit for a motorcycle.

FIG. 4 is a voltage waveform diagram showing lighting control in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Charge lighting control circuit 2 Coil 2a All taps 2b Middle tap 3 Headlight 4 Battery 5 DC load 6 Charging voltage control circuit 7 Lighting control circuit 11 Charge lighting control circuit 12 Lighting control circuit

Claims (1)

[Claims] 1. A battery charging and lamp lighting control circuit for charging a battery and lighting a lamp with an AC waveform voltage output from an output terminal of a generator that rotates in conjunction with an engine, comprising: A charging voltage adjustment circuit connected between the output terminal and the battery for adjusting the positive voltage of the waveform voltage and supplying the voltage to the battery; and supplying only the negative voltage of the AC waveform voltage to the lamp. A battery charging and lamp lighting control circuit, comprising: a negative voltage supply means connected between the output terminal and the lamp to perform the operation.