CN2731689Y

CN2731689Y - Magnetic micro powder loss a.c. contactor

Info

Publication number: CN2731689Y
Application number: CN 200420061644
Authority: CN
Inventors: 王昆益
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-10-13
Filing date: 2004-10-13
Publication date: 2005-10-05
Anticipated expiration: 2014-10-13

Abstract

The utility model relates to a magnetic micro power consumption alternating current contactor, comprising a casing, more than a couple of moving contacts and static contacts. The moving contact is fixed on a movable arm with non-magnetic material and the lower part of the movable arm is fixed to a permanent magnet. The utility model is also provided with a rotation axis just under the movable arm and the rotation axis is fixed to another permanent magnet which is served as acting with the permanent magnet of the movable arm. The utility model also comprises a rotation axis driving device which is composed of a generator and a driving device, and a movable arm up position-limit mechanism. The contactor of the utility model is capable of operating without electric power and just using electricity in switching, the rate of economy of electric power consumption reaches to more than 99%. In addition, the utility model has the advantages of high safety performance and operation without heating.

Description

The little power consumption A.C. contactor of magnetic-type

One, technical field

The utility model relates to low-tension switch electric appliance, and particularly contactor is made the field.

Two, background technology

A.C. contactor is that a kind of effect that utilizes electromagnetic attraction makes contact connect device for switching with the disjunction high-current circuit continually.It is widely used in power transmission system and other industrial department (as chemical industry, control in the industrial production such as gold, oil), and contactor is pressed the difference of control load electric current kind, can be divided into D.C. contactor and A.C. contactor.Especially in various single, three-phase electric apparatus Equipment Control, be a kind of more commonly used, control autocontrol switch easily.A.C. contactor mainly is made up of electromagnetic system and contact system.In use, operating current is big during owing to operation, and the electric energy loss of gross power 90% is in magnetic hysteresis, and on eddy current and the short-circuited conducting sleeve, the meritorious power consumption major part of coil also converts heat to and loses, and causes faults such as burning coil.Simultaneously equipment and staff have also been brought unsafe factor.Also cause the significant wastage of electric energy.Report for work according to the relevant of industry, the electric weight that China consumes on A.C. contactor surpasses 10,000,000,000 kilowatt hours.It wherein more than 90% the idle work that wastes.The economize on electricity of No. (1981) 56, State Council literary composition issue instructs in No. 2 literary composition just instruction will implement the A.C. contactor power-saving measures.

Three, utility model content

The purpose of this utility model is to provide a kind of magnetic-type little power consumption A.C. contactor at prior art problems and weak point, to reduce the work power consumption.This novel purpose is realized that by following design the little power consumption A.C. contactor of a kind of magnetic-type comprises shell, and a pair of above dynamic and static contact is characterized in that described moving contact is fixed on the swing arm of non magnetic material, and the swing arm bottom is fixed with a permanent magnet; Also have the rotating shaft that is arranged under the swing arm, be fixed with on the rotating shaft as with another permanent magnet of permanent magnetism iron phase effect; Also have by motor) and transmission mechanism rotating shaft drive unit and the up position-limit mechanism of swing arm formed.

Adopted design as above, rotating shaft rotates 180 ° at every turn, and the corresponding reversal that makes rotating shaft permanent magnet (abbreviation of the permanent magnetic field on the rotating shaft) top once.The magnetic of supposing the bottom of swing arm permanent magnet is the N utmost point, and when the top reversal of rotating shaft permanent magnet was the N utmost point, the two magnetic was identical, produce repulsive force, make swing arm up, finally stopped spacing by limit position mechanism, moving contact on the swing arm and fixed contact break away from, and contactor is in off-state; Rotating shaft rotates 180 ° once more, and rotating shaft permanent magnetic field top polarity then is transformed to the S utmost point, and the two magnetic is different, produces attraction, makes swing arm descending, and the moving contact on the swing arm contacts with fixed contact, and contactor is in on-state.

Compare with existing A.C. contactor; This is novel to have following characteristics:

1, power saving rate can reach more than 99%, because contactor not electricity consumption of when work is just logical at contactor, and just electricity consumption (control time is 2-5 second) during disconnected conversion.

2, do not generate heat, because not electricity consumption of contactor work, no heater members in the body, so work long hours, the temperature of contactor can not surpass the temperature of environment for use.

3, noise is little, more oscillation phenomenon can not occur.

4, safe, there is not electricity during because of work, can cause unsafe factor because of the contactor fault in no instance.

5, with present contactor contrast, simple in structure, can simplify production technology, improve the quality of products, reduce operational failure.

6, concerning the user, can reduce use cost greatly, reduce Breakdown Maintenance expense between the operating period.

Four, description of drawings

Fig. 1 is a profile of the present utility model;

When Fig. 2 Fig. 3 is respectively the reversal when the rotating shaft permanent magnet shown in Figure 1, the polar relationship schematic diagram of three permanent magnets;

Fig. 4 is the schematic perspective view of contactor shown in Figure 1 swing arm when having three pairs of contacts.

Five, embodiment

Fig. 1 illustrates, the top of the swing arm 1 of non magnetic material is overhanging through shell 2 top drillings, the bottom of swing arm is fixed with a permanent magnet 13, the swing arm bottom is stretched into downwards in the positioning sleeve 14, be provided with a rotating shaft 6 (rotating shaft can be erected on the rotating shaft base 7) under the swing arm, be fixed with another permanent magnet 12 on the rotating shaft, preferably permanent magnet 12 be embedded in the rotating shaft, make with convenient.The rotating shaft drive unit is made up of motor 10 and gear drive, and driving gear 8 is installed on the motor shaft, and driven gear 5 is installed on the rotating shaft 6.Through control end 9 input control signals motor is rotated, slow down through transmission mechanism again, and make rotating shaft rotate 180 ° at every turn, with the magnetic polarity direction of conversion permanent magnet 12.Preferred plan is, fixedly install a permanent magnet 11 (permanent magnet 11 can be arranged on the rotating shaft base 7) under the permanent magnet 12 of rotating shaft 6 again, and make the polarity on permanent magnetic field 11 tops identical with the polarity of permanent magnet 13 bottoms, can play the acceleration inverting action to permanent magnet 12, shorten contactor switching change-over time, reduce the generation of electric arc.This new type contactor can be provided with a pair of above dynamic and static contact, moving contact is made up of brace 3 and two moving

contact

3a, 3b being fixed on the brace two ends, correspondingly, a fixed contact is made up of two fixed contact 4a, 4b, fixed contact 4a, 4b respectively with moving

contact

3a, 3b mating reaction, brace is fixed on the swing arm, and two moving contacts lay respectively at the swing arm both sides on the brace.Fig. 4 illustrates, this novel situation that three pairs of dynamic and static contacts are set.Permanent magnet 13 can adopt two to be separately positioned on two side positions of swing arm bottom, and permanent magnet 12 adopts two equally, is arranged on the rotating shaft accordingly.Referring to Fig. 2 Fig. 3,

permanent magnet

11,12,13 be shaped as sheet, general rectangles or the round sheets of adopting more.Among Fig. 2 Fig. 3, permanent magnet 13 bottoms are the N utmost point, and when permanent magnetic field 12 top polarity upsets were the N utmost point, (as shown in Figure 2), the two polarity was identical, produce repulsive force, (in this example, shell 2 can play position-limiting action to the up position-limit mechanism prevention of the up final passive arm of swing arm, in addition, also a postioning abutment can be set, the prevention swing arm is up), moving contact and fixed contact disconnect, and contactor is in off-state.At this moment apply the 2-5 control voltage in second at control end, motor begins to rotate, by driven rotary axle Rotate 180 degree behind the gear drive reduction of speed, make the magnetic direction of the magnetic direction of permanent magnet 12 and permanent magnet 13 different, produce attraction, swing arm is moved down, and moving contact and fixed contact are connected, and contactor is in on-state.At this moment apply the 2-5 disconnection control voltage in second at control end, motor begins to rotate, and driven rotary axle Rotate 180 degree, direction when making the magnetic direction of permanent magnet 12 turn back to static state, promptly the magnetic direction with permanent magnet 13 is identical, produces repulsive force, and swing arm is moved up, moving contact and fixed contact disconnect, and contactor is in off-state.

During this was novel, swing arm 1, shell 2, brace 3, positioning sleeve 4, rotating shaft 6 etc. all adopted nonmagnetic substance to make.The swing arm shape is not limited to shape shown in Figure 4, can adopt other shape in the actual fabrication.

In addition, basis is novel not to be only applicable to A.C. contactor, and is applicable to D.C. contactor.And can on this novel basic structure basis, increase arc-control device.

Claims

1, the little power consumption A.C. contactor of a kind of magnetic-type comprises shell, and a pair of above dynamic and static contact is characterized in that described moving contact is fixed on the swing arm (1) of non magnetic material, and the swing arm bottom is fixed with a permanent magnet (13); Also have the rotating shaft (6) that is arranged under the swing arm, be fixed with on the rotating shaft as another permanent magnet (12) that acts on mutually with permanent magnet (13); Also have rotating shaft drive unit and the up position-limit mechanism of swing arm formed by motor (10) and transmission mechanism.

2, contactor according to claim 1 is characterized in that, also is set with a permanent magnet (11) under the permanent magnet (12) on the described rotating shaft (6), and the polarity on permanent magnet (11) top is identical with the polarity of permanent magnet (13) bottom.

3, contactor according to claim 2 is characterized in that, described permanent magnet (11,12,13) be shaped as sheet.

4, contactor according to claim 3, it is characterized in that, a described moving contact is made up of link piece (3) and two moving contacts (3a, 3b) of being arranged on the brace two ends, and link piece (3) middle part is fixed on the swing arm, and two moving contacts at link piece two ends lay respectively at the swing arm both sides; A described fixed contact is formed with two fixed contacts (4a, 4b) of two moving contacts (3a, 3b) mating reaction respectively by being used for.

5, according to claim 1 or 2 or 3 or 4 described contactors, it is characterized in that also having the positioning sleeve (14) of non magnetic material; Described swing arm (1) bottom is stretched among the positioning sleeve.

6, according to claim 1 or 2 or 3 or 4 described contactors, it is characterized in that described transmission mechanism is a gear drive: driving gear (8) is installed on motor (10) axle, and driven gear (5) is installed on the rotating shaft (6).

According to claim 1 or 2 or 3 or 4 described contactors, it is characterized in that 7, described permanent magnet (13) is embedded in swing arm (1) bottom; Described permanent magnet (12) is embedded in rotating shaft (6) inside.