JPH0357203A - Electromagnetic apparatus and electromagnetic switch - Google Patents

Abstract

PURPOSE:To increase an attractive force of a movable member without hardly increasing a power consumption by a method wherein a coil part is constituted of a coil part for rating use and a coil part for acceleration use and an electric current is applied to the coil part for acceleration use only for a definite time just after an electric current has been applied to the coil. CONSTITUTION:An electromagnet apparatus A is constituted of the following as basic members: a fixed iron core which is fixed and bonded to one piece of a yoke 1; a coil 3 which is wound on a circumference of the fixed iron core via a coil frame 2; and a movable member 4 which is supported so as to be capable of being moved back and forth inside the coil 3. The coil 3 is composed of coil part 3a for rating use and a coil part 3b for acceleration use whose wire diameter and number of turns are nearly the same. A timer means 5 applies an electric current to the coil part 3b for acceleration use only for a definite time immediately after an electric current has been applied to the coil 3. Thereby, it is possible to increase an attractive force of the movable member 4 without hardly increasing a power consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnet device and an electromagnetic switch for opening and closing an electric circuit, such as an electromagnetic relay or an electromagnetic contactor, using the electromagnet device.

[Conventional technology]

This type of electromagnetic switch has an electromagnet device and a contact device as basic control members, and the movable member is operated by controlling the energization of the coil of the electromagnet device. Generally, the movable contact moves toward and away from the fixed contact in response to the contact. Therefore, if a contact is brought into contact (closed) when the coil is energized, for example, the coil must be energized to maintain that state.

[Problems to be Solved by the Invention] In this type of electromagnetic switch, it is desired to increase the attractive force of the movable member of the electromagnetic device in order to improve the contact opening/closing ability or performance. In this case, the ampere-turn of the electromagnet device is usually increased, but this increases the power consumption of the coil and requires an increase in the capacity of the power supply for controlling (operating) the electromagnet device.

The present invention has been made in view of the above reasons, and its purpose is to provide an electromagnet device that can increase the attractive force of a movable member without substantially increasing the power consumption of the electromagnet device. The present invention also provides an electromagnetic switch that uses the electromagnet device to improve the contact opening/closing ability or performance without substantially increasing the power consumption of the electromagnet device.

[Means for solving the problem] In order to solve the problem, the lightning i described in claim (1)
The N5 stone device has a coil consisting of a constant speed coil section and an acceleration coil section, and the acceleration coil section is designed to be energized only for a predetermined period of time immediately after the coil G is energized.

In order to conduct electricity only for a predetermined period of time, a switch is inserted in series with the acceleration coil section, and a timer means is provided to determine the on time of this switch.

Further, the electromagnetic switch according to claim (2) is the electromagnetic switch according to claim (1).
It includes the electromagnetic device described above and a contact device consisting of a fixed contact and a movable contact provided on a movable contact, in which a movable member is operated by controlling the application to the coil, and a movable contact is configured to respond to the movable member. A child is connected to this, and its response action causes both contacts to come into contact with and separate from each other.

[Effect]

According to the invention, when the coil is energized, the rated coil section is energized, and the switch is turned on for the on time determined by the timer means, and the acceleration coil section is also energized. Therefore, during this ON time, both coils are energized and the attractive force of the movable member of the lightning magnet device is increased.As a result, the electromagnetic switch using this electromagnetic device has improved contact switching ability or performance. I can figure it out.

Further, after the on-time period has elapsed, the power supply to the acceleration coil section is stopped, so that the power consumption of the electromagnet device hardly increases.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electromagnet device and an electromagnetic switch according to the present invention will be described below with reference to FIGS. 1 to 5.

The electromagnet device A includes a yoke 1 having a square shape, a fixed core (not shown) fixed to one piece of the yoke 1, and a coil 3 wound around the fixed core via a coil frame 2. A plunger-type movable member 4 supported reciprocally within the coil 3 (specifically, the through hole of the coil frame 2) is used as a basic member.

The coil frame 2 fits into the mouth shape of the yoke, and has a terminal holding portion 2b extending from the end of a flange portion 2a that regulates the coil winding space. And terminal holding part 2b
Then, the terminal 2C is held by a presser or a simultaneous prefix. Further, a fixed core (not shown) is inserted into the through hole of the coil frame 2, and its end face faces one end face of the movable member 4.

The movable member 4 is designed so that the other side that does not face the fixed core has a portion that protrudes from the through hole of the coil frame 2 at all positions in the operating range. A connecting rod 4a for driving a contact device, which will be described later, is provided in this portion.

The above configuration is a general plunger type electromagnetic device, and controls the energization of the coil 3. In other words, when energized, the movable member 4 is attracted to the fixed core by magnetic attraction force, and when the energization is stopped in that state, the movable member 4 is attracted to the fixed core. The movable member 4 returns to its original state. For this return, a return spring is provided between the movable member 4 and the fixed core or in the contact device.

Next, main parts of the present invention will be explained.

The coil 3 is a coil part 3a for constant winding which has substantially the same wire diameter and number of turns.
and an acceleration coil portion 3b. in particular,
Two coil wires are wound at the same time, one of which becomes the rated coil part 3a and the other becomes the acceleration coil part 3b.

5 is a timer means for a predetermined time Ts (5 in this embodiment, approximately 2
This is for energizing only for 00 msec). The 1,000-stage timer 5 may have an appropriate configuration, but for example, the 5th stage
As shown in the figure, the timer circuit can be constituted by a switching transistor Tr, a capacitor C, and a resistor R, which are connected in series to the acceleration coil section 3b. In the case of this timer circuit, the series circuit of the transformer Tr and the acceleration coil section 3h and the series circuit of the capacitor C and the resistor R are connected in parallel, and the heath of the transistor Tr is connected to the connection point of the capacitor C and the resistor R. . Further, the rating coil section 3a is connected in parallel to the series circuit of the transistor Tr and the acceleration coil section 3b.

In FIG. 1, S is a control source for controlling the energization of the coil 3 whose voltage ε is, for example, 24ν DC, and SW is a control switch.

The 1,000-stage timer 5 described above is attached to the yoke 1 and has input terminals 5a, 5a and terminals 2c. 2c is an output terminal 5b connected to the collector of the transistor Tr, that is, the positive electrode of the operating voltage 1s; one end of the rated coil section 3a is connected to the emitter of the transistor Tr; and one end of the acceleration coil section 3h. However, the output terminal 5d connected to the negative electrode of the operating power source S is connected to the other ends of both coil parts 3a and 3b, respectively. According to this connection relationship, one end of the rated coil portion 3a may be directly connected to the terminal 2c.

In this electromagnetic device A, when the sui-no-chi is closed, the voltage E of the operating power source S is applied to the timer means 5, that is, the entire coil 3, and the lightning voltage Ve is applied across the timer means 5, that is, the entire coil 3, as shown in FIG. 4(a).
becomes voltage E. Therefore, as shown in FIG. 4(b), the voltage Va at both ends of the coil portion 3a is applied (energized) as a voltage lmi. Then, immediately after energizing, a predetermined time T
s, the voltage Vb at both ends of the accelerating coil portion 3b is equal to the voltage E.
is applied (ilT! electric).

In the present embodiment, the constant diameter coil part 3a and the acceleration coil part 3b are wound with substantially the same wire diameter and the same number of turns.
Of course, these may be made different. Furthermore, this research is applicable not only to plunger types but also to flush bar types and the like.

Next, electromagnetic switching::3B (specifically, electromagnetic contact 25) using this electromagnet device A will be explained. In FIG. 3, each member of the electromagnetic contact RHB is shown exploded.

A housing defining the outer contour of the electromagnetic contactor B is composed of a lower case 11 and an upper cover 12 made of resin.

The lower case 11 has a generally box-like shape with one side open, and the electromagnet device A described above is accommodated therein. Upper Cajal l2 is
It also serves as a terminal block, and is attached to the opening of the lower case 1l with the partition plate l3 in between so as to close it. The upper cover 12 also has a recess in the center, and a contact device C, which will be described later, is housed in the recess.

A fixed contact 14 (only one pair is shown in FIG. 3, and the others are omitted) of twice the required number of contacts, which also serves as a temporary terminal, is attached to the above-mentioned upper cover 12, and is installed in the recess of the upper cover 12. A fixed contact I5 is provided at a portion located at .

Reference numeral 16 denotes a movable frame in which a required number of long holes 16a, 16a, - are arranged in parallel, and is supported in a recess in the upper cover 12 by a frame capable of reciprocating in the direction in which the long holes are arranged in parallel. These long holes 16a, 16a
, a movable contact 18 having a movable contact l7 that contacts the fixed contact 15 is attached together with a contact pressure spring 19. This movable frame 16 is connected to the tip of a connecting rod 4a provided on the above-mentioned movable member 4. 20 is a return spring for the movable frame l6, and 21 is a terminal screw.

In such an electromagnetic contactor B, a movable member 4 operates by controlling the energization to a coil 3 of an electromagnet device A, and a movable contactor 1 is connected via a movable frame 6 etc. to respond to the movable member 4. is connected to this, and both contacts 1 are connected by its response action.
5. 17 comes into contact and separates. The action of the electromagnet device A in this case is as described above.

In addition, in this embodiment, an example of an electromagnetic contactor was explained as an electromagnetic switch, but the present invention can be applied to various other switching devices having an electromagnetic device and a contact device.

[Effect of Yumei]

Since the electromagnet device and electromagnetic switch of the present invention are constructed as described above, when the coil is energized, the rated coil section is energized and the switch is kept in the on state for the on time determined by the timer means. During this ON time, both coils are energized and the attractive force of the movable member of the electromagnet device is increased, and when this ON time has passed, the acceleration coil is energized. Since the passage of the lightning is stopped, the poisonous power consumed by the lightning magnet device hardly increases.Therefore, the electromagnet device can increase the attractive force of the movable member without increasing the consumed spiritual power, and the electromagnet device Similarly, the switch can improve the contact opening/closing ability or performance without substantially increasing the power consumption of the electromagnetic device.

[Brief explanation of drawings]

Figure 1 is a wiring diagram showing an embodiment of the invention as claimed in claim (1), Figure 2 is a perspective view thereof, and Figure 3 is a diagram showing an embodiment of the invention as claimed in claim (2). An exploded perspective view, FIG. 4C is an explanatory diagram of the energized state of the tourmaline device common to the invention recited in claim (+)(2), and FIG. 5 is as recited in claim (+)(2). FIG. 3 is a wiring diagram showing a specific configuration example of an electromagnet device common to the invention of FIG. A--electromagnetic device, 1-yoke, 2-coil frame, 3-
・-Coil, 3a-・One rated coil part, 3b-Acceleration coil part, 4-・One movable member, 4a series connecting rod, 5-・Timer means, B・One electric switch (magnetic contactor) , 11-lower case, l2-upper case, 13-partition plate, contact device, 14-fixed contact, 15-fixed contact, 16-movable frame, 17-movable contact, 18-movable contact, 19-・
Contact pressure spring, 20/return spring.

Claims (2)

[Claims] (1) In an electromagnet device consisting of a yoke, a fixed core, a coil, and a movable member, in which the movable member is operated by controlling energization to the coil, the coil is composed of a rated coil part and an acceleration coil part, and this The acceleration coil section is an electromagnetic device that is energized only for a predetermined period of time immediately after the coil is energized. (2) The electromagnet device according to claim (1) and a contact device including a fixed contact and a movable contact provided on a movable contact, in which a movable member is operated by controlling energization to a coil, and the movable member is operated by controlling energization to a coil. An electromagnetic switch in which a movable contact is connected to a member so as to respond to the member, and both contacts connect and separate due to the responsive action.