Electromagnetic contactor

A technology of electromagnetic contactor and electromagnet, which is applied in the direction of relays, electromagnets, and electromagnets with armatures, etc., and can solve problems such as repeated impacts and large impact sounds

Inactive Publication Date: 2009-03-04
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, due to the above closing or breaking, there will be a large impact sound from the movable iron core 1, the fixed iron core 20, the cross arm 2, the base 10, etc., or dust from the movable iron core 1, etc., or for the cross arm 2. The problem of repeated impact on the base 10, etc.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0046] refer to figure 1 And Fig. 2 illustrates the embodiment of the present invention. figure 1 It is a block diagram representing an overall connection of an embodiment of the present invention, and Fig. 2 is figure 1 A detailed internal circuit diagram of the instruction generation section is shown. exist figure 1 And in Fig. 2, it is composed of a switch signal part 304 and an attraction control part 303, and the switch signal part 314 makes the switch 304S generate closing and opening Figure 19 The signal of the current of the electromagnet 301 (coil 21) of the electromagnetic contactor 100 shown, the described attraction force control part 303 controls the force flowing through the electromagnet 301 according to the switch signal from the switch signal part 304 as the force control means. The integral value of the current, thereby controlling the electromagnetic attraction force of the electromagnet 301.

[0047] The attractive force control section 303 is compo...

Embodiment 2

[0072] refer to figure 1 And FIG. 5 illustrates other embodiments of the present invention. Figure 5 is figure 1 The internal wiring diagram of the instruction generation section is shown. In the above example, the image 3 When the current flowing in the middle time T4 is the magnitude of the holding current, the attraction between the movable iron core 1 and the fixed iron core 20 may not be sufficient due to the electromagnetic attraction force of the fixed iron core 20 and the deviation of the trip spring 30 . Here, an embodiment of the invention improving this aspect is described.

[0073] In FIG. 5, the command generation part 400 adds the second current command part 400a to the command generation part shown in FIG. The instruction value is connected to the output, and the output signal of the timer TU4 and the output signal of the timer TU5 are inverted by the "NOT" circuit 415, and the logical product is obtained through the "OR" circuit 416, and according to the...

Embodiment 3

[0080] refer to figure 1 And FIG. 7 illustrates other embodiments of the present invention. Fig. 7 is an internal wiring diagram of the instruction generation part. In Embodiments 1 and 2 above, since the movable iron core 1 moves to the first or second position at a high speed, it was found that a shock occurs when the electromagnetic contactor is closed or opened due to deviations such as voltage fluctuations.

[0081] Here, the embodiment of the present invention is to reduce the final acceleration when closing or releasing the movable iron core 1 in order to solve the above-mentioned problems. In FIG. 7, the instruction generating section 400 changes the timer TU1 of the above-mentioned instruction generating section shown in FIG. For the timer TU18 having a time U18 slightly shorter than its set time, the current command part 400c of the weak acceleration current E3, the current command part 400e of the weak deceleration current E7, the output of the timer T3 and the t...

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PUM

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Abstract

An electromagnetic contactor which makes or breaks a contact by moving a moving core from a first position which is a wide gap away from a fixed core to a second position a narrow gap away from the fixed core by an electromagnetic force generated by an electric current flowing from a power source to an electromagnet, wherein an attraction force control unit is provided which allows a strong acceleration current (E1) to flow to the electromagnet for a specified time until an acceleration of the moving core at the second position reaches a preset value and allows an attraction current (E6) to flow to the electromagnetic at approximately the second position.

Description

technical field [0001] The invention relates to an electromagnetic contactor, which can suppress the impact caused by the collision between the movable iron core and the fixed iron core when the movable iron core is closed and released by electromagnetic force. Background technique [0002] refer to Figure 19 Describes the magnetic contactor. Figure 19 It is a sectional view showing the structure of the electromagnetic contactor. exist Figure 19 Among them, the electromagnetic contactor 100 is composed of a fixed part and a movable part. The fixed part combines the base 10 with the assembly table 23 by using screws by compressing the trip spring 30 installed between the cross arm 2 and the assembly table 23 . On the base 10, the main fixed contact piece 25 and the auxiliary fixed contact piece 26 with the contacts 12 are fixed, and the fixed iron core 20 is installed in the assembly platform 23 through the rubber plate 22 for impact buffering. shaped box 11. An electrom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H47/32H01F7/18H01H47/04
CPCH01H47/04H01F7/1844H01F2007/1894H01H47/02
Inventor 金原好秀
Owner MITSUBISHI ELECTRIC CORP
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