JPH0226223Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to the structure of a noise prevention capacitor connected between the output terminals of a generator used in an automobile.

Conventionally, generators used for automobiles have been full-wave rectified from an alternating current generator to obtain a direct current output voltage. For this reason, commutation noise of the full-wave rectifier is generated, which has an adverse effect on in-vehicle equipment such as radios. In addition, a noise prevention capacitor was installed between the generator output terminals to prevent the above noise.

The conventional noise prevention capacitors have disadvantages in that the number of parts increases due to the use of capacitors, and a space is required to mount the capacitors.

The present invention aims to eliminate the above-mentioned drawbacks.

In addition, to describe the main part of the embodiment, a noise prevention capacitor is insert molded into an insulating bushing that electrically insulates the generator output terminal and the generator frame, and the generator output terminal and the generator frame are connected to each other. Since the electrodes of the noise prevention capacitor are provided on the end faces that contact the frame, the noise prevention capacitor does not require an increase in the number of parts of the generator and does not require consideration of the mounting space for the noise prevention capacitor.

FIG. 1 is a structural diagram of a generator according to the present invention.
FIG. 2 is an electrical wiring diagram of the generator shown in FIG. 1.

In the figure, 1 is the frame of the generator, which has a negative potential. A pulley 2 is driven by a belt by an engine or the like (not shown). 3 generates an AC output voltage with a stator winding. A field winding 4 controls the output voltage of the stator winding 3 to a predetermined value by controlling the field current flowing through the winding with a regulator 8. 5 is a full-wave rectifier which converts the alternating current voltage generated in the stator winding 3 into direct current voltage.

5a is a positive side heat sink, 5b is a negative side heat sink, 6
is the volt as the terminal to take out the positive output voltage,
An insulating bushing 7 electrically insulates the terminal 6 and the frame 1. Since the operation of the generator in the above configuration is already known, detailed explanation will be omitted.

FIG. 3 is a detailed view of part A in FIG. 1, in which the terminal 6 is press-fitted into the positive side heat sink 5a of the full-wave rectifier at the knurled portion 6a, and the positive voltage is taken out from the generator at the threaded portion 6b.

Reference numeral 10 denotes the main body of the noise prevention capacitor, which is composed of a film capacitor. 11 and 12 are electrode plates for connection with the outside, electrode 11 is in contact with terminal 6, electrode 12 is in contact with frame 1, respectively, and capacitor 10 is connected between the DC output voltage terminals as shown in FIG. There is. Reference numerals 13 and 14 denote electrodes formed on the end faces of the film capacitor, which are generally called metallicon, and are made by vapor-depositing tin. Here, the electrodes 11 and 12 and the electrodes 13 and 14 can be easily connected by spot welding or the like. The noise prevention capacitor 10 manufactured as described above is formed into an insulating bushing 7 whose outer periphery is covered with resin by insert molding. Further, the insulating member 15 electrically insulates between the frame 1 and the positive side heat sink 5a.

As described above, in the present invention, by forming a cylindrical capacitor with an insulating member on the inner peripheral surface and a pair of external connection electrodes on both end surfaces, this capacitor can be inserted into the terminal and fixed. In this case, the external connection electrode at one end can be electrically connected to the frame, and the external connection electrode at the other end can be electrically connected to the terminal.
It can be easily electrically connected, and
This has the excellent effect of making assembly and automation extremely easy.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a generator showing an embodiment of the present invention, Fig. 2 is an electrical wiring diagram of the generator, and Fig. 3 is a detailed view of section A in Fig. 1, which is an embodiment of the capacitor of the present invention. An example is illustrated. 6...terminal, 1...generator frame, 7...
Bushing, 10...Capacitor body.

Claims (1)

[Claims for Utility Model Registration] A terminal 6 for rectifying the output of the alternating current generator to extract the output voltage, and a frame 1 of the generator that forms one electrode of the output voltage and is insulated from and held by the terminal. and a cylindrical capacitor 10 having an insulating member 7 on the cylindrical inner peripheral surface and a pair of external connection electrodes 11 and 12 on both end surfaces, and the cylindrical capacitor 10 is connected to the outer periphery of the terminal. By inserting and fixing the terminal into the frame, and fixing the terminal to the frame, the capacitor is sandwiched between the terminal and the frame, and the external connection terminal at one end of the capacitor is connected to the frame, and the external connection terminal at the other end is connected to the frame. A noise prevention capacitor for a generator, characterized in that an external connection terminal is electrically connected to the terminal.