JPS636386B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a DC power connection system for engine vehicles that use AC output only for lighting equipment.

Engine vehicles that use AC output only for lighting equipment (hereinafter simply referred to as engine vehicles) use an alternating current generator (AC generator) that rotates in conjunction with the drive of the engine, as shown in Figure 1. Dynamo;
ACG) 1 is attached, and the AC output is transmitted to the main harness via connectors 2 and 3. In this case, in the main harness, the transmitted AC power is supplied to the lighting equipment either as is or after it is simply rectified by a rectifier, so in the low rotation range of the engine, sufficient output voltage cannot be obtained, and the illumination level is This may darken the color or make it less marketable. In addition, with the development of radio equipment, there is a growing demand for the ability to extract DC power at will.
A stable supply of DC power is desired. For this reason, in the past, connectors 2 and 3 as shown in FIG.
A DC converter 10 including a regulator is inserted between them, and DC output is obtained from terminals E ₁ and E ₂ . In this case, the main harness is supplied with power exactly the same as in the case of FIG. In other words, even if the DC converter 10 is inserted between the connectors 2 and 3, there will be no effect on the main harness.

On the other hand, FIG. 3 shows the configuration of a _conventional DC converter 10 and _{its connection} method. It consists of a battery 12, a main switch 13 for supplying DC power from the battery 12 to the regulator 11 to operate it, and terminals E ₁ and E ₂ for taking out the DC power from the battery 12 to the outside. Further, the AC output of the AC generator 1 is applied to the thyristors SCR ₁ and SCR ₂ of the regulator 11, and is rectified by the diodes D ₁ to _{D 4} and applied to the load 5 via the battery 12 and the load switch 4, respectively. It is becoming more and more like this.

When power is supplied to a load 5 such as a lamp, the load switch 4 is turned on and the main switch 13 is turned on to operate the regulator 11.
Turn on. As a result, the DC power rectified by the diodes D ₁ to _{D 4} is supplied to the load 5 to light up lamps and the like, and at the same time, the battery 12 is charged. In this case, the voltage of the battery 12 is detected by the regulator 11, and is always stabilized by controlling the gates of the thyristors _SCR1 and _SCR2 . When cutting off the load 5, the load switch 4 is turned off, but it is necessary to turn off the main switch 13 in order to prevent the battery 12 from being discharged due to leakage current of the regulator 11. As described above, the conventional power supply connection system has the disadvantage that the main switch 13 is provided and that the main switch 13 must be turned off to prevent the battery 12 from discharging when the load is cut off. SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a DC power connection system for engine vehicles that does not have such drawbacks.

This invention will be explained below.

As shown in FIG. 4, this invention eliminates the above-mentioned main switch 13 and rectifies the output of the alternator 1 with a rectifier 14 consisting of diodes D ₅ and D ₆ to supply it to the regulator 11. It is something.

In this way, since the main switch 13 is eliminated, the complexity of on/off operations can be eliminated, and the alternator 1
Since the output voltage of the thyristors SCR 1 and SCR 2 is detected by the rectifier 14 and the gates of the thyristors SCR ₁ and SCR ₂ are controlled thereby, stable power can always be supplied. Further, the DC output of the battery 12 can be taken out from the terminals E ₁ and E ₂ , thereby making it possible to connect and operate a radio device or the like.

[Brief explanation of the drawing]

Fig. 1 shows an overview of the power supply system of an engine vehicle, Fig. 2 shows a DC converter inserted between the connectors, Fig. 3 shows a conventional power supply connection system, and Fig. 4 FIG. 1 is a diagram showing an embodiment of the present invention. 1... AC generator (dynamo), 2, 3... Connector, 4... Load switch, 5... Load, 10... DC converter, 11... Regulator, 12... Battery,
13... Main switch, 14... Rectifier.

Claims (1)

[Claims] 1 In an engine vehicle that transmits the AC output of an alternator to the main harness via a connector, a battery and a regulator for supplying stable power to the main harness are inserted between the connectors, and a regulator for supplying stable power to the main harness is inserted between the connectors. The battery is charged by the rectified output, and the DC output of the battery is taken out to the outside, and the output of the alternator is applied to the regulator as the voltage of a rectifier circuit that rectifies the drive output, so that the rectifier circuit A direct current power connection method for an engine vehicle, characterized by controlling the input voltage of the engine.