JPS61239609A - Three-phase capacitor device - 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] Industrial Application Field The present invention relates to a three-phase capacitor device.
be.

1. Conventional technology Conventionally, in a three-phase capacitor device consisting of multiple groups of capacitors and switches for opening and closing the capacitors, capacitors whose internal parts are connected in a Δ or Y three-phase manner are used, as shown in Figure 2. However, switches were generally installed to open and close the line current of each capacitor.

Problems to be Solved by the Invention However, in such a three-phase capacitor device, the current value is f times larger than that in the case of switching the phase current of the delta connection, and it is difficult to switch a large capacity current. needed a switch.

The present invention has been made in view of the above points, and is based on a plurality of groups of Δ
The purpose of this invention is to provide a three-phase capacitor device that is cheaper than the conventional one by combining a capacitor with a terminal arrangement that allows the phase current of the wired capacitor to be switched on and off and a switch.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a unit connection body formed by connecting a switch in series to a unit capacitor formed by connecting one unit capacitor element or a plurality of unit capacitor elements. A plurality of m-position connectors are connected in parallel. [It is equipped with three unit capacitor devices each consisting of two units, and these three unit capacitor devices are connected in a triangular manner.

Operation According to the present invention, with the above-described configuration, in a three-phase capacitor device in which each group has the same capacity as the conventional one, the current switching capacity of the switch used is 1/J'T of that of the conventional product.

Embodiment FIG. 1 is a circuit diagram showing a three-phase capacitor device of the present invention. U, V, W are power supply terminals, Uo, vo, and Wo are terminals to which capacitors of each phase are collectively connected, U1+ U2 +
U3 + V1+ V2 + V3 + W1+ W2
+ W3 is an independent terminal of each phase capacitor, C1u
+ C2u+ C3u is the 3 groups of capacitor elements that make up the U phase C1Vlc2Vl"3V is the 3 group that makes up the V phase
Group of capacitor elements, C1wC21y + C3VI
are three groups of capacitor elements that constitute the W phase. Furthermore, c
+ul C1y+ 3-phase first group j with C+W
・~ form a chill, and form a 3-phase second group capacitor with C2・, C2・, C2・, C3ul C3v
l C3W forms the third group capacitor. 5oul
5IVI SIN is a switch for opening and closing the phase current of the first group capacitor, S2u, S2v, S2W is a switch for opening and closing the phase current of the second group capacitor, S
3u+S3y+"3W is a switch for opening and closing the phase current of the third group capacitor.

In the above configuration, each phase of the three-phase capacitor device is configured by connecting a plurality of series-connected bodies consisting of a capacitor element and a switch in parallel, and each phase has three unit capacitor devices,
Since it is triangularly connected to form a three-phase capacitor device,
The switch is placed at the position where the phase current of each unit capacitor device is switched on and off, and since the phase current is 1/f of the line current, the current switching capacity is 1/H compared to the conventional example. A switch can be used.

Effects of the Invention As is clear from the above explanation, the three-phase capacitor device of the present invention has a switch placed in a position to open and close the phase current, so unlike the conventional example, the switch is placed so that the three-phase capacitor opens and closes the line current. Compared to the equipment, the phase current is 1/1 of the line current.
Since the voltage is 100 V, a switch with a current switching capacity of 1 A.tau.5...-7 can be used, and the effect is industrially impressive.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a three-phase capacitor device showing an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional three-phase capacitor device. C1u+ C2u+ C5u+ C'iv+
027+ C'37+ C1W+c2WI C5
W “”” Capacitor element, 51ulS2uIS3u+
SjV+ 827+ 837. SIH+
521y+ S3W""" switch.

Claims (2)

[Claims] (1) A plurality of unit connection bodies each having a switch connected in series to one unit capacitor element or a unit capacitor formed by connecting a plurality of unit capacitor elements are provided, and the plurality of unit connection bodies are connected in parallel. A three-phase capacitor device is equipped with three unit capacitor devices, and these three unit capacitor devices are connected in a triangular manner. (2) The three-phase capacitor device according to claim 1, in which each unit capacitor has the same capacity.