JPS6052655B2 - capacitor motor - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in capacitor motors.

Capacitor motors are widely used in household electrical appliances such as coolers and washing machines. FIGS. 1 and 2 show the circuit configuration of a conventional capacitor motor. In a motor main body 10 consisting of a main winding 1 and a split-phase winding 2 connected in parallel to the main winding 1, the split-phase winding 2 is Phase split capacitors 30 are connected in series.

Recently, there has been a growing demand for the safety of this type of electrical appliances.
In order to prevent an internal failure of the capacitor from developing into a disaster such as a fire, the capacitor 30 is equipped with a safety device 4 such as a fuse, so that when an internal failure occurs in the capacitor, the fuse is blown by the excessive current. Many devices are used in which the capacitor element 3 and the motor body 10 are automatically disconnected from the power source.

However, in recent years, the capacitor element 3 installed in capacitor motors has been replaced by paper capacitors and film capacitors.
Capacitor paper as a dielectric material, metallized paper with metals such as zinc and aluminum vacuum-deposited as electrodes on plastic film, metallized paper capacitors using metallized film, and metallized film capacitors came into use.
Such capacitors do not allow excessive current to flow even when packed, so the fusible fuse does not blow and the capacitor motor cannot be protected.

. The present invention has been conceived with this in mind, and therefore, its purpose is to provide a capacitor, regardless of the type of capacitor element used in the motor, in the event that a failure occurs in the capacitor. It is an object of the present invention to provide this type of electric motor that can reliably prevent burnout accidents of the electric motor body.

In order to achieve this object, the present invention houses the safety device and the phase splitting capacitor in one container, and configures this container to be deformed by the internal pressure that increases due to an internal failure of the capacitor. , and the above-mentioned safety device is arranged in this deformation portion, so that the safety device is activated in accordance with the deformation of the container.

Note that the present invention can be applied in the same way even when a phase advance capacitor for power factor improvement is used together with a phase split capacitor.

Embodiments of the present invention will be specifically described below with reference to FIGS. 3 and 4.

Note that the same or equivalent parts as in FIGS. 1 and 2 will be described using the same reference numerals. FIGS. 3 and 4 show a specific example of the phase splitting capacitor 30 corresponding to FIGS. 1 and 2, respectively. The phase splitting capacitor 30 shown in FIG. 3, which corresponds to the embodiment shown in FIG.
1 is sealed by an upper lid 12.

Three terminals 14a, 14b, and 14c are attached to this upper cover 12, and the terminal 14a is connected to the capacitor element 3 via a cutting conductor 16 forming the safety device 4, and the terminal 14b is connected to the safety device 41. A cutting conductor 17 (see FIG. 1) is connected to the terminal 14a via a lead wire 18, and the terminal 14c is further connected to the capacitor element 3 via a lead wire 19. The condition shown in Figure 3 is due to an internal failure of the capacitor. More container 1
1 shows a state in which the internal pressure inside 1 increases, the top cover 12 deforms upward, cuts the cutting conductors 16 and 17, and the safety device operates. The phase splitting capacitor 30 shown in FIG. 4, which corresponds to the embodiment shown in FIG. 2, has the same structure as that shown in FIG. The difference is that the terminal 14b is connected to the capacitor element 3 via a lead wire 18.

The embodiment shown in FIG. 4 also shows a state in which the safety device is activated. When the safety device is made of a cutting conductor as shown in Figures 3 and 4, make sure that there is almost no looseness between the top cover to which the terminal is attached and the terminal board before the top cover is deformed. It is necessary to erect it in the If a safety device is configured with a cutting conductor as described above, there is an advantage that it can be used as a connecting conductor between a terminal and a capacitor element.

As explained above, according to the present invention, the safety device and the phase splitting capacitor are housed in one container, and the container is configured to be deformed by the internal pressure that increases due to an internal failure of the capacitor, In addition, the above-mentioned safety device is installed in the deformable part of the container so that the safety device is activated according to the deformation of the container, so even if an internal failure occurs in the capacitor, the safety device will be activated sufficiently even if the current is small. This makes it possible to reliably prevent burnout accidents of this type of electric motor.

[Brief explanation of the drawing]

1 and 2 are connection diagrams showing the circuit configuration of a conventional capacitor motor, and FIGS. 3 and 4 are longitudinal sectional views showing an example of the configuration of a phase splitting capacitor used in the present invention. 1...Main winding, 2...Split phase winding, 3...
...Separate phase capacitor, 4,41...Safety device, 11...Container, 14a-14c...
...Terminal.

Claims (1)

[Claims] 1 A main winding, a phase splitter winding connected in parallel to the main winding, a phase splitter capacitor connected in series to the phase splitter, and a safe connection between the main winding, the phase splitter, and the input terminal. In a capacitor motor having a device, the safety device and the split-phase capacitor are housed in one container, and the container is configured to be deformed by internal pressure that increases due to an internal failure of the capacitor, and A capacitor motor, characterized in that the safety device is arranged in the deformation part so that the safety device is activated in accordance with the deformation of the container.