JPH04255625A - Ac driving circuit for latching electromagnet - Google Patents

Abstract

PURPOSE:To provide an AC drive circuit for a latching magnet which can reduce the number of parts and simplify installation of a diode. CONSTITUTION:DC terminals 7, 8 of a diode pridge 4 are connected to negative terminal sides of the first contact part 2 and the second contact part 3 that interlock with a latching magnet B, and the coil 1 of the latching magnet B is connected in serial to the AC terminal 9 of the diode bridge 4.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC drive circuit for a latching electromagnet applied to remote control relays and the like.

0002

2. Description of the Related Art Conventional examples are shown in FIGS. 4 and 5. That is, FIG. 4 is an exploded perspective view of a remote control relay, in which a movable body 31 is provided in front of a latching electromagnet 30, which is an example of a bistable polarized type, and a movable contact device 32 is built into the movable body 31. However, in conjunction with the operation of the plunger 33 of the latching electromagnet 30, the movable body 31 rotates and the movable contact device 32 operates. Further, on the upper part of the latching electromagnet 30, there is provided an auxiliary contact device 35 which is opened and closed by the operating piece 34 of the movable body 31, and a printed circuit board 38 on which diodes 36, 37, etc. are mounted. 39 is a case, 40 is a cover, 41 is a terminal that also serves as a fixed contact, 42 is a movable side terminal, and 43 is an external terminal for driving the electromagnet.

FIG. 5 shows the internal circuit of this remote control relay and its operating principle. That is, when the coil 50 of the latching electromagnet 30 and the latching electromagnet 30 are operated in one direction, one is turned on and the other is turned off, and when the latching electromagnet 30 is operated in the other direction, the one is turned off and the other is turned off. A first contact portion 51 and a second contact portion 52 of the auxiliary contact device 35 are interlocked with the latching electromagnet 30 so as to be turned on, and a first diode connected to one pole side of the first contact portion 51. 53, and a first contact point on one pole side of the second contact portion 52.
and a second diode 54 connected in the opposite direction to the diode 53, the side opposite to the first contact portion 51 of the first diode 53 and the side opposite to the second contact portion 52 of the second diode 54. A coil 50 is connected in series. A is a remote control relay, 55 is an external operation switch, and 56 is an AC power source. In the operation switch 55, SW1 and SW2 are contacts, and D1 and D2 are diodes.

When the contact SW2 of the operation switch 55 is turned on, one half wave of alternating current is passed through the diode D2, the second contact portion 52, the second diode 54, and the coil 50. This current causes the latching electromagnet 30 to
moves, but due to the action of the plunger 33, the movable body 31
rotates to drive the movable contact device 32, and the operating piece 34 of the movable body 31 operates the first contact portion 51 and the second contact portion 52, so the second contact portion 52 is turned off and the first contact portion 52 is turned off. The contact portion 51 is turned on and the second contact portion 52 is turned on.
When the coil 50 is turned off, the excitation of the coil 50 is stopped, but the movable body 3
The operating condition of 1 is held in position by a permanent magnet (not shown). Next, when the contact SW1 is turned on, the first contact part 51 is on, so the other half wave of the AC, that is, the opposite direction of the A current flows, so that the plunger 33 of the latching electromagnet 30 returns to its original position, and at the same time is operated by the operating piece 34, the first contact portion 51 is turned off and the second contact portion 52 is turned on.

[0005]

However, this AC drive circuit for the latching electromagnet has the disadvantage that it requires the installation of two diodes, making the assembly complicated. Therefore, an object of the present invention is to provide an AC drive circuit for a latching electromagnet that can reduce the number of parts and simplify the installation of diodes.

[0006]

[Means for Solving the Problems] An AC drive circuit for a latching electromagnet according to claim 1 includes a coil of a latching electromagnet,
A second latching electromagnet interlocked with the latching electromagnet such that movement of the latching electromagnet in one direction turns one of the latching electromagnets on and the other of the latching electromagnets turns off, and movement of the latching electromagnet in the other direction turns one of the latching electromagnets off and the other of the latching electromagnets turns on. 1
and a diode bridge in which a DC terminal is connected to one pole side of each of the first contact part and the second contact part. 1. An AC drive circuit for a latching electromagnet, in which the coil is connected in series with each other pole side of the contact portions of the second electrode and one of the AC terminals of the diode bridge.

The AC drive circuit for a latching electromagnet according to claim 2, wherein the number of said AC terminals of said diode bridge is one. In the AC drive circuit for a latching electromagnet according to claim 3, the number of the AC terminals of the diode bridge is two.
AC drive circuit for the described latching electromagnet.

[0008]

According to the AC drive circuit for the latching electromagnet of claim 1, when AC power is supplied when the first contact portion is on, one half wave of the AC is energized through the diodes in one direction of the diode bridge. The coil of the latching electromagnet is excited in one direction, and as a result, the latching electromagnet operates and the first contact section and the second contact section are linked, so that the first contact section is turned off and the second contact section is turned on. Become. Next, when AC power is supplied, the second contact part is on, so the other half wave of the AC is energized through the diode in the other direction of the diode bridge connected to the second contact part, and the coil of the latching electromagnet is turned on. The latching electromagnet is excited in the direction, and the latching electromagnet returns, and in conjunction with this,
The first contact section returns to ON and the second contact section returns to OFF. In this case, since it is only necessary to incorporate one diode bridge, the number of parts can be reduced and installation can be simplified compared to the conventional case of incorporating two diodes.

According to the AC drive circuit for a latching electromagnet according to claim 2, in claim 1, since the number of the AC terminals of the diode bridge is one, in addition to the effect of claim 1, the structure of the diode bridge allows a pair of AC terminals to be connected to each other. Since there is no need to short-circuit one of the diodes, wiring becomes easier. According to the AC drive circuit for a latching electromagnet according to claim 3,
In claim 1, since there are two AC terminals of the diode bridge, in addition to the effect of claim 1, since a pair of diodes facing the same direction are connected in parallel, even if one diode fails, , the other diode ensures normal operation and improves reliability.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be explained with reference to FIG. That is, this AC drive circuit for the latching electromagnet includes the coil 1 of the latching electromagnet B and the first contact portion 2.
, a second contact portion 3 , and a diode bridge 4 , and is powered by an AC power source 5 via an operation switch 6 .

The configuration of the latching electromagnet B and the interlocking configuration of the latching electromagnet B and the first contact portion 2 and the second contact portion 3 are similar to those shown in FIG. That is, the latching electromagnet B is a bistable polar type, and the first contact part 2 and the second contact part 3 are turned on by the unidirectional operation of the latching electromagnet B, and the first contact part 2 is turned on and the second contact part 3 is turned on. The second contact section 3 is turned off, and the first contact section 2 is turned off due to the operation of the latching electromagnet B in the other direction, and the second contact section 3 is turned on.

[0012] The diode bridge 4 connects the first contact portion 2
and DC terminals 7 and 8 on each one pole side of the second contact portion 3.
is connected. Further, in the embodiment, one of the AC terminals 9 and 10 is connected to the coil 1. 11 to 14 are diodes. 15 and 16 are external terminals connected to the coil 1, the first contact section 2, and the second contact section 3, to which an AC power source 5 is connected via a switch 6. In the switch 6, D1 and D2 are diodes, and SW1 and SW2 are contacts.

According to this embodiment, if the contact SW1 of the switch 6 is turned on while the first contact portion 2 is on, the AC power 5 can be supplied, and the AC power is supplied through the diode 11 in one direction of the diode bridge 4. One side half-wave is energized and the coil 1 of the latching electromagnet B is excited in one direction, so that the latching electromagnet B operates and the first contact part 2 and the second contact part 3 are interlocked to Contact part 2
is turned off and the second contact portion 3 is turned on.

Next, when the second contact part 3 is on, if the contact SW2 of the switch 6 is turned on, the AC power 5 can be supplied, and the diode 1 in the other direction of the diode bridge 4 can be supplied.
The other half wave of the alternating current is energized through 2, and the coil 1 of the latching electromagnet B is excited in the other direction, and the latching electromagnet B operates to return, and in conjunction with this, the first contact portion 2 returns to ON. The second contact portion 3 returns to the OFF state. In this case, since it is only necessary to incorporate one diode bridge 12, the number of parts can be reduced and installation can be simplified compared to the conventional case of incorporating two diodes.

Furthermore, the AC terminal 9 of the diode bridge 4
, 10 are connected, the configuration of the diode bridge 4 eliminates the need to short-circuit the pair of diodes 11 and 12, making wiring easier. The second part of this invention
An example of this will be explained with reference to FIG. That is, in the first embodiment, in the AC drive circuit for this latching electromagnet, two DC terminals 7 and 8 are connected to the first contact part 2 and the second contact part 3, and two AC terminals 9 are connected to the first contact part 2 and the second contact part 3. , 10 are connected to the coil 1. Therefore, when the switch 6 is operated, when the first contact section 2 is on, the pair of diodes 11
.

Therefore, when the coil 1 is energized in two directions, the pair of diodes 11 and 13 or the pair of diodes 1
2 and 14 are connected in parallel, even if one of the diodes fails, the other diode can ensure normal operation, improving reliability. A third embodiment of the invention will be described with reference to FIG. That is, in the first embodiment, the AC drive circuit for this latching electromagnet is such that the diode bridge 4 connects the coil 1 to the first contact section 2 and the second contact section 3, and the diode bridge 4 connects the coil 1 to the opposite side of the coil 1. 4 are connected.

Note that in this embodiment, the diode bridge 4
The number of AC terminals is one, but there are two as in the second embodiment.
It could be a book.

[0018]

Effects of the Invention The AC drive circuit for the latching electromagnet according to claim 1 is provided by connecting the DC terminals of the diode bridge to the first contact part and the second contact part which are interlocked with the latching electromagnet. Since the current direction of the coil is controlled when the second contact is turned on, only one diode bridge is required, which reduces the number of parts and makes installation easier compared to the conventional case of incorporating two diodes. This has the effect of simplifying.

In the AC drive circuit for a latching electromagnet according to a second aspect of the present invention, since the number of the AC terminals of the diode bridge is one, in addition to the effects of the first aspect,
Wiring becomes easier because there is no need to short-circuit one of the diodes. According to the AC drive circuit for a latching electromagnet according to claim 3, in claim 1, since the number of the AC terminals of the diode bridge is two, in addition to the effect of claim 1, the pair of diodes facing in the same direction Since they are connected in parallel, even if one diode fails, the other diode can ensure normal operation, improving reliability.

[Brief explanation of the drawing]

FIG. 1 is an AC drive circuit diagram of a first embodiment of the present invention.

FIG. 2 is an AC drive circuit diagram of a second embodiment.

FIG. 3 is an AC drive circuit diagram of a third embodiment.

FIG. 4 is an exploded perspective view of the remote control relay.

FIG. 5 is a diagram of a conventional AC drive circuit.

[Explanation of symbols]

1 Coil 2 First contact part 3 Second contact part 4 Diode bridge 7, 8 DC terminal 9,10 AC terminal B Latching electromagnet

Claims (3)

[Claims] 1. A coil of a latching electromagnet; operation of the latching electromagnet in one direction turns one on and the other turns off, and operation of the latching electromagnet in the other direction turns off the one and turns on the other. a first contact portion and a second contact portion interlocked with the latching electromagnet so that the first contact portion and the second contact portion are interlocked with the latching electromagnet;
a diode bridge in which a DC terminal is connected to each one pole side of the contact part, and either one of the other pole sides of the first contact part and the second contact part and the AC terminal of the diode bridge. and the coil are connected in series to form an AC drive circuit for a latching electromagnet. 2. The AC drive circuit for a latching electromagnet according to claim 1, wherein the diode bridge has one AC terminal. 3. The AC drive circuit for a latching electromagnet according to claim 1, wherein the number of AC terminals of the diode bridge is two.