JPH0536824U - Water resistance reactor - Google Patents

Abstract

(57) [Summary] [Purpose] To construct an AC dummy load at low cost and in a simple manner. A flexible insulating tube 5 is wound around a cylinder 3 of a drum 2 to form a coil, and resistance water 6 containing impurities such as copper sulfate mixed therein is filled inside the tube. . When an alternating current is passed through the resistance water via the terminal 7, it operates as a series circuit of resistance and inductance. The resistance value can be adjusted by the amount of impurities added, and the inductance value can be set by the coil shape (the number of turns, the coil axial length 1, the coil radius R).

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a water resistance reactor that can be used as a dummy load for an AC power supply.

[0002]

[Prior Art]

 In the load test of AC power supply equipment such as static inverters, AC motor generators, and transformers, a dummy load with a specified power factor is used to meet the specified load conditions. Conventionally, such a dummy load was constructed by combining an enameled resistor and a reactor with a conductor coil, but in the case of a large power capacity it becomes large, and when it is possible to change the load power factor and load impedance. Requires a large number of resistors and reactors so that the resistance value and the inductance value can be changed, resulting in a large number of parts and a high manufacturing cost.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to provide a water resistance reactor capable of addressing the above-mentioned problems in the conventional dummy load by using a resistance-reactor equivalent series circuit device using water resistance. .

[0004]

[Means for Solving the Problems]

 To achieve this object, the water resistance reactor of the present invention comprises a flexible insulating tube formed in a coil shape and resistance water containing impurities filled in the tube. It is characterized by that.

[0005]

[Action]

 By forming a flexible or flexible insulating tube filled with resistance water in the form of a coil, a single body acts as a series body of resistance and reactor, and the resistance value is changed by the amount of impurities added in the resistance water. The inductance can be set by selecting the number of turns of the coil by the insulating tube, the axial length, and the diameter.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. In the figure, the same reference numerals indicate the same parts. FIG. 1 is a configuration diagram of a water resistance reactor 1. A drum 2 is composed of a cylinder 3 and a frame 4, and a flexible insulating tube 5 made of synthetic resin or the like is wound around the cylinder 3. To do. The insulating tube 5 is filled with resistance water 6 in which impurities such as copper sulfate are mixed, as shown in a partially broken state, and the insulating tube 5 is configured as a coil. Terminals 7 are provided at both ends of the insulating tube 5.

As shown in FIG. 2, these terminals 7 are composed of a base portion 8 and a connecting portion 9 to be inserted into the insulating tube 5. The outer peripheral portion of the connecting portion 9 has a plurality of wedge-shaped locking projections 10 in cross section. When the connecting portion 9 is pushed into the insulating tube 5, the locking projection 10 tightly engages with the inner surface of the tube, and the resistance water 6 is sealed in the insulating tube 5. In order to prevent the insulating tube 5 from being detached from the connecting portion 9 and to more fully seal the resistance water, the outer peripheral portion of the insulating tube 5 that engages with the locking projection 10 has, for example, a band-shaped portion. It may be tightened with a tightening tool. A hole 11 is provided in the inside of the connecting portion 9 so that the connecting portion 9 is in sufficient contact with the resistance water 6. A screw 12 is planted in the base portion 8 of the terminal 7, and the electric circuit connecting electric wire 13 is screwed to the screw, for example, via a terminal piece 14.

When an AC voltage V is applied between the terminals 7 at both ends of the insulating tube 5, a current I flows in the resistance water 6 and a series circuit of a resistance R and an inductance L is equivalently formed between both terminals. I = V / (R + jωL) The power factor at this time is given by cos θ = R / | R + jωL |. The value of the resistance R can be changed depending on the amount of impurities mixed in the resistance water 6. The value of the inductance L is given by L = K · μs · 10 ⁻⁷ (2πRN) ² / l = K · 10 ⁻⁷ (2πRN) ² / l [H], where K: Nagaoka coefficient, μs : Relative permeability (= 1), N: number of turns, l: coil axial length, R: coil (cylindrical) radius. Therefore, the value of the inductance L can be set by changing the number of turns, the axial length, and the radius of the coil.

FIG. 3 is a configuration diagram in which a plurality of, for example, four water resistance reactors 1a to 1d are connected in series to obtain a desired resistance and inductance. The winding start ends and winding end ends of the insulating tubes 5 in the adjacent water resistance reactors are connected by the connector / current introducing terminal 17, and the directions of the energizing current I in the adjacent water resistance reactors are opposite to each other as indicated by the arrow. To prevent the interlinkage magnetic flux and inductance from decreasing.

A specific example of the connector / current introducing terminal 17 is shown in FIG. The connector and terminal are male part 17₁And female part 17₂And these male and female parts are respectively the base part 18₁, 18₂, Connection part 19 inserted in the insulating tube 5₁, 19₂With a plurality of wedge-shaped locking projections 20 around each connection.₁, 20₂To form. Male part 17₁The male connector 21₁ But the female part 17₂The male connector 21₁Female connector 21 into which the₂Is formed, the male part 17₁And female part 17₂Inside of the, the communication hole of resistance water 22₁2 2₂Is provided. Male connector section 21₁A gasket (packing) 23 is provided on the male and female connector portions 21.₁, 21₂Prevent leakage of resistance water from. Male part 17 ₁ Base portion 18₁A screw 24 for connecting an electric wire is planted therein, and is used for short-circuiting the water resistance reactor, bypassing, and forming a current introducing circuit.

FIG. 5 is a configuration diagram of an embodiment in which the resistance value of the resistance water in the insulating tube 5 can be controlled and cooled. The even number of water resistance reactors are divided into two parts, electrically connected in parallel and connected in series for resistance water flow. FIG. 5 shows the case of two water resistance reactors 1a and 1b. One end of the insulating tube 5 of the both water resistance reactor is connected by the connector / current introducing terminal 17, and the same terminal is connected to one end of the power feeding circuit. The other ends of the insulating tube 5 terminal resistor water can flow, for example, FIG. 4 connector shown in and current introduction terminal 17, or as shown, the resistance value control using the male portion 17 _1, the tube of the cooling system Coupled to the line 25, the two terminals 17 ₁ are short-circuited with a wire and connected to the other end of the feed circuit. Due to this short-circuit connection of the terminal 17 ₁ , no current from the power supply circuit flows in the conduit 25.

The resistance value control / cooling system includes a water resistance controller 26, a pump 27, and a cooler 28. By operating the pump 27, the resistance water circulates through the water resistance reactors 1a and 1b, and the resistance water heated by the energization is cooled by the cooler 28 to keep the water temperature at a substantially constant value. The water resistance controller 26 increases the amount of impurities such as copper sulfate or ion exchange according to the resistance value of the water resistance reactor obtained from the component in phase with the applied voltage of the water resistance reactor and the applied voltage of the energizing current, for example. The impurities in the resistance water are removed by to adjust the impurity concentration in the resistance water within a predetermined range, and in combination with the almost constant resistance water temperature, the resistance value of the water resistance reactor is kept almost constant. In this embodiment, since the resistance water is directly cooled, it can be easily used for a large-volume load application.

FIG. 6 shows a configuration example in which n × m water resistance reactors are connected in series so as to cope with high voltage and high power. The n water resistance reactors 1 are stacked and provided in m rows. When changing the inductance, short the unnecessary water resistance reactor with an electric wire.

FIG. 7 is a configuration diagram of the drum 2 that allows the water resistance reactors to be stacked, and FIG. 8 is a sectional view of a half portion thereof. Is an annular groove 29 is formed in a frame 4 ₁ on the drum 2, the lower half of the ring 30 stacked in this groove is fitted. The ring may be fixed to the annular groove 29 by using an adhesive or the like, or may be used by being fitted into the ring groove 29 only at the time of stacking. The frame 4 ₂ below, stacked upon being annular groove 31 the upper half of the stacking ring 3 0 is fitted to the frame above the water resistance reactor located below stage is fitted form. The drum 2 is provided with a plurality of pressing rods 32 for holding the insulating tube 5 so that the insulating tube 5 wound around the cylinder 3 does not collapse. The presser bar is fitted in a hole 33 formed in the frame 4 ₁ above, the male threaded portion formed at the distal end of the presser bar 32 is screwed into the female screw hole 34 formed in the frame 4 ₂ below It is attached to the drum 2 by this.

In the above-described embodiments including FIGS. 1 and 7, the insulating tube 5 is wound around the cylinder 3 of the water resistance reactor 1 in one row (one step). Accordingly, the insulating tube 5 may of course be wound in multiple rows (multi-stages).

[0016]

[Effect of the device]

 As described above, according to the present invention, by forming a flexible insulating tube filled with resistance water into a coil shape, a resistor and a reactor in-line body can be formed by a single body. A large-capacity AC dummy load can be easily configured at low cost. The resistance value can be easily changed by changing the amount of impurities added in the resistance water, and the inductance value can be easily set by changing the coil shape.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a specific example of a terminal.

FIG. 3 is a configuration diagram when a plurality of water resistance reactors are connected in series.

FIG. 4 is a sectional view of a specific example of a connector / current introducing terminal.

FIG. 5 is a configuration diagram of an embodiment having a resistance value control of resistance water and a cooling system.

FIG. 6 is a configuration diagram when a large number of water resistance reactors are used.

FIG. 7 is a configuration diagram of a drum unit that can be stacked.

FIG. 8 is a half cross-sectional view of the drum parts that can be stacked.

[Explanation of symbols]

 1 Water resistance reactor 2 Drum 3 Cylindrical 4 Frame 5 Insulating tube 6 Resistance water 7 Terminal 17 Connector and current introduction terminal 26 Water resistance controller 27 Pump 28 Cooler 29, 31 Annular groove 30 Stacking ring 32 Presser bar

Claims (1)

[Scope of utility model registration request] 1. A water resistance reactor comprising a flexible insulating tube formed in a coil shape and resistance water containing impurities filled in the tube.