JPH0525646U - High voltage switching relay - Google Patents

Abstract

(57) [Summary] [Structure] A rotor capable of rotating around an axis in the enclosure, a pair of permanent magnets of opposite polarities provided at opposite positions on the outer periphery of the rotor, and the enclosure. Inside, a pair of fixed iron cores provided at opposite positions on the circumference close to the outer peripheral surface of the rotor, a drive coil wound around the fixed iron core, and a movable contact provided coaxially with the rotor. And a fixed contact arranged so as to come into contact with and separate from the movable contact in the sealed container, and the magnetic core of the permanent magnet of the rotor is fixed to the fixed iron core when the movable contact is in contact with the fixed contact. A high-voltage switching relay that is configured so that it has a deviation angle that is delayed with respect to the pole center. [Effect] Since the distance between the contacts can be increased, it is possible to switch between high voltage and small size. Since the contact holding force can be obtained by the attractive force of the permanent magnet, it is not necessary to constantly supply current, and power saving can be achieved. Since the distance between contacts is large, the leakage current is small over a long period of time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a relay for switching high voltage for small current and discharging residual electric charge of equipment.

[0002]

[Prior Art]

 When inspecting a cathode ray tube, etc., the applied voltage changes depending on the size and type of the cathode ray tube, so it is necessary to switch the voltage. In this application, the magnitude of voltage is several KV to 50 KV and the current is several μA to 10 mA.

A high-voltage switching relay is used for switching the voltage, but the conventional high-voltage switching relay has a structure in which a movable iron core moves in and out of a cylindrical coil, and the movable iron core has a movable contact. The movable contactor was brought into contact with and separated from the fixed contactor fixed to the glass-enclosed container by providing a child. SF ₆ gas is usually enclosed in the glass enclosure to improve arc extinguishing performance.

[0004]

[Problems to be solved by the device]

 However, in this conventional structure, there is a problem that the entire size becomes large because it is necessary to increase the distance between the fixed contact and the movable contact in order to maintain the insulation distance between the contacts at a certain value or more. It was

Further, even if the insulation between the contacts is good in the initial stage, the contact material adheres to the container wall during use and the leak current increases, and the leak current is that of a cathode ray tube. There is a problem that it is not possible to distinguish whether it is a switching relay or a switching relay, which adversely affects the measurement results.

Therefore, the problem to be solved by the present invention is to provide a switching relay that is small in size, capable of switching high voltage, and has a minimum leak current so as not to increase even in continuous use.

[0007]

[Means for Solving the Problems]

 In order to solve this problem, the high voltage switching relay of the present invention comprises a rotor that can rotate around an axis in a sealed container and a pair of opposite polarities that are provided at opposite positions on the outer circumference of the rotor. Of the permanent magnet, a pair of fixed iron cores provided at opposing positions on the circumference in the enclosure close to the outer peripheral surface of the rotor, a drive coil wound around the fixed iron core, The movable contactor is provided coaxially with the rotor, and the fixed contactor is disposed inside the enclosure so as to come into contact with and separate from the movable contactor. The movable contactor contacts the fixed contactor. In this state, the magnetic core of the permanent magnet of the rotor is positioned so as to have a delay angle of deviation with respect to the pole of the fixed iron core.

[0008]

[Action]

 When a driving voltage is applied to one of the driving coils, the fixed core is excited so that it has the same polarity as the permanent magnet approaching in the current state, and the repulsive force causes the rotor to move to the position of the opposite fixed core. Rotate. At that position, the movable contact contacts the other fixed contact. The application of voltage to the drive coil is turned off at that time, but the contact pressure between the movable contact and the fixed contact is due to the attraction between the permanent magnet of the rotor and the fixed iron core. It is continuously applied by its suction power.

[0009]

【Example】

 Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a sectional view of a high voltage switching relay according to the present invention, and FIGS. 2, 3, 4 and 5 are AA line, BB line, CC line and D of FIG. 1, respectively. FIG. 6 is a perspective view of the rotor, and FIG.

In these figures, reference numeral 1 denotes a sealed container made of a heat-resistant insulating material such as polycarbonate, which is composed of an inner container 1a, a bottom container 1b and a lid 1c. A rotor 2 is rotatably housed in a ball bearing 3 inside the inner container 1a, and permanent magnets 4 and 5 are fixed to the outer periphery of the rotor 2 at opposing positions as shown in FIG. Further, in the bottom container 1b, fixed iron cores 6 and 7 and drive coils 8 and 9 for exciting them are arranged at positions close to the rotor 2.

The rotor 2 is also integrally provided with a movable contact arm 10, and a movable contact 11 is attached to the tip of the movable contact arm 10 as shown in FIG.

On the other hand, in the sealed container 1, as shown in FIG. 4, a common terminal 12 electrically connected to the movable contactor 11 through a flexible conductive wire 15, a fixed contactor 13 that contacts the movable contactor 11, 14 is fixed. The common terminal 12 and the fixed contacts 13 and 14 are respectively guided to the outside via lead wires. The movable contact 11 and the fixed contacts 13 and 14 are made of a contact material such as CuW, and an arc extinguishing gas such as SF ₆ gas is enclosed in the enclosure 1 through a gas enclosure and sealed with a cap 17. Further, aluminum particles for adsorbing decomposed gas are stored in a case 16 fixed to the lid 1c and having a large number of small holes at the bottom.

As shown in FIG. 4, the rotation angle α of the movable contact 11 is within 180 °, and the rotor 2 rotates within the range of α 2. At this time, as shown in FIG. 3, the permanent magnets 4, 5 are attached at positions which are offset by θ from the poles of the fixed iron cores 6, 7.

In the high voltage switching relay configured as described above, when a current having the same polarity as that of the permanent magnet 4 is applied to one of the drive coils, for example, the drive coil 8 from the position shown in FIG. 4 repels each other, and the other permanent magnet 5 and the iron core 6 attract each other. As a result, the rotor 2 rotates by an angle α as shown by the alternate long and short dash line in FIG. 4, and stops when the movable contact 11 comes into contact with the other fixed contact 14. Then, the power supply to the drive coil 8 is stopped. In practice, a drive pulse having an ON time that is 2 to 3 times the time required to switch the angle of the rotor 2 is applied.

When the energization of the drive coil 8 is stopped, the permanent magnets 4 and 5 are deviated from the fixed iron cores 6 and 7 by an angle of θ, so that the rotor 2 has a magnetic field corresponding to the angle of θ. A suction force works, and this suction force acts as a contact pressure for pressing the movable contact 11 against the fixed contact 14. Therefore, a biasing means such as a spring is not particularly required.

In order to switch the movable contact 11 to the original position, the drive coil 9 is energized this time. As a result, the permanent magnet 4 repels in the same manner as described above, the permanent spherical magnet 5 is attracted to the iron core 7, and the rotor returns to the position shown in FIG.

[0018]

[Effect of the device]

 As described above, the present invention has the following effects.

Since the distance between the contacts can be increased, the size can be reduced and high voltage can be switched.

Since the contact holding force can be obtained by the attractive force of the permanent magnet, it is not necessary to constantly supply current, and power saving can be achieved.

Since the distance between the contacts is large, the leak current is small over a long period of time.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a high voltage switching relay according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

3 is a cross-sectional view taken along the line BB of FIG.

FIG. 4 is a cross-sectional view taken along the line CC of FIG.

5 is a view taken along the line DD of FIG.

FIG. 6 is a perspective view of a rotor.

[Explanation of symbols]

1 enclosed container, 1a inner container, 1b bottom container, 1c
Lid, 2 rotors, 3 ball bearings, 4, 5 permanent magnets,
6,7 iron core, 8,9 drive coil, 10 movable contact arm, 11 movable contact, 12 common terminal, 13,1
4 fixed contacts, 15 flexible conductors, 16 cases, 17 gas inlet caps

Claims (1)

[Scope of utility model registration request] 1. A rotor capable of rotating around an axis in an enclosure, a pair of permanent magnets of opposite polarities provided at opposing positions on the outer circumference of the rotor, and the rotor in the enclosure. A pair of fixed iron cores provided at opposite positions on the circumference close to the outer peripheral surface of the rotor, a drive coil wound around the fixed iron core, and a movable contactor provided coaxially with the rotor. And a fixed contact arranged in the sealed container so as to come into contact with and separate from the movable contact, wherein the magnetic core of the permanent magnet of the rotor is in a state where the movable contact is in contact with the fixed contact. A high voltage switching relay, which is set at a position having a deviation angle that is delayed with respect to the pole center of the fixed iron core.