CN201557070U

CN201557070U - Novel star-delta starter

Info

Publication number: CN201557070U
Application number: CN2009202540704U
Authority: CN
Inventors: 冯志刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-19
Filing date: 2009-10-19
Publication date: 2010-08-18
Anticipated expiration: 2019-10-19

Abstract

The utility model relates to a novel star-delta starter. The structure of the novel star-delta starter includes that three fixed contacts in an upper row and three fixed contacts in a lower row are arranged in a casing, each fixed contact is connected with a wire connecting terminal outside the casing; the wire connecting terminals of the three fixed contacts in the lower row are connected in series; movable contacts are arranged between the fixed contacts in the upper low and in the lower row; an electromagnet for controlling the movable contacts is arranged in the casing, and a wire connecting terminal for the electromagnet is connected to the casing. The conversion between star connection and delta connection of the three-phase winding of a motor is realized by electric control of the on-off state of the electromagnet in the starter. Compared with the existing star-delta starter, the utility model has the advantages of compact structure, simple connection, convenient use, easy maintenance and cheaper price.

Description

Novel star triangle start device

Technical field

The utility model relates to a kind of startup servicing unit of three phase alternating current motor, specifically a kind of novel star triangle start device.

Background technology

Three phase alternating current motor will carry out the conversion of the star connection and the delta connection of three phase windings in start-up course.Star triangle transducer commonly used is two A.C. contactors, and it is not only loosely organized, and it is big to take up room, and the wiring complexity, therefore uses inconvenience to some extent.

The utility model content

The purpose of this utility model just provides a kind of novel star triangle start device, to overcome the deficiency that prior art exists, satisfies the use needs of real work.

The utility model is achieved in that a kind of novel star triangle start device, and two rows, three fixed contacts of every row are housed respectively in casing, and each fixed contact is an external binding post respectively; The binding post of three fixed contacts of following row is connected in series; Correspondence is provided with armature contact between upper and lower two row's fixed contacts, and the electromagnet of control armature contact action is contained in the casing, and the electromagnet binding post is arranged on the casing.

Described armature contact has three, becomes single setting, and each armature contact is corresponding to last row's fixed contact and following row's fixed contact.

Described armature contact has six, becomes double setting, and two armature contacts of every row correspond respectively to last row's fixed contact and following row's fixed contact.

The utility model is to be that the basis is carried out process and remould and formed with an A.C. contactor.During use, three link terminals of last row connect three head ends of three-phase alternating-current supply and three phase alternating current motor respectively, three tail ends of three phase alternating current motor then respectively with armature contact on external lead wire join.Like this, under the electromagnet off-position, last row's three fixed contacts and armature contact join respectively (the normally-closed contact closure that is equivalent to A.C. contactor), make the three phase windings connection triangular in shape of three phase alternating current motor; When electromagnet energising adhesive, last row's three fixed contacts and armature contact are separated, armature contact promptly with following three fixed contacts of row join respectively (the normally opened contact closure that is equivalent to A.C. contactor), because the binding post of three fixed contacts of row is connected in series down, so just make three tail ends of three phase alternating current motor link together, thereby make three phase windings of three phase alternating current motor be Y-connection.By power on/off control, just can realize the star connection of three phase alternating current motor three phase windings and the conversion of delta connection thus to the electromagnet in this star triangle start device.

The utility model compact conformation, wiring is simple, and is easy to use, safeguards easily, than the low price of existing star triangle start device.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

Agent structure of the present utility model and profile are identical substantially with the structure and the profile of A.C. contactor.

As shown in Figure 1, in casing 2 electromagnet is housed, the electromagnet binding post was located at the both sides of casing 2 in 1 minute.On the top of casing 2 are installing zones of fixed contact and armature contact.Fixed contact 4 has three of two rows, every rows.Each external binding post 5 of three fixed contacts of last row is connected to a lead-out wire 6, three head ends of these three lead-out wire tap three-phase alternating-current supplies and three phase alternating current motor on each binding post.Each external binding post 7 of three fixed contacts of following row, these three binding posts are connected in series by lead.

Be arranged between upper and lower two row's fixed contacts by the armature contact (not marking among the figure) of magnet control,, make armature contact keep closely contacting with last row's fixed contact under normal conditions by the resiliency supported of little spring.

The set-up mode of armature contact has two kinds, and a kind of is single setting, and another kind is double setting.Single setting, its armature contact has three, and each armature contact is corresponding to last row's fixed contact and following row's fixed contact.Three armature contacts respectively have a lead-out wire 3, are used to connect the tail end of three phase alternating current motor.Double setting, its armature contact has six (identical with the counter structure of existing A.C. contactor), divides three row to be provided with, and whenever shows two contacts up and down; Two armature contacts of every row correspond respectively to last row's fixed contact and following row's fixed contact.

Claims

1. a novel star triangle start device is characterized in that being equipped with respectively two rows, three fixed contacts of every row (4) in casing (2), and each fixed contact (4) is an external binding post respectively; The binding post (7) of arranging three fixed contacts down is connected in series; Correspondence is provided with armature contact between upper and lower two row's fixed contacts, and the electromagnet of control armature contact action is contained in the casing (2), and electromagnet binding post (1) is arranged on the casing (2).

2. novel star triangle start device according to claim 1 is characterized in that described armature contact has three, becomes single setting, and each armature contact is corresponding to last row's fixed contact and following row's fixed contact.

3. novel star triangle start device according to claim 1 is characterized in that described armature contact has six, becomes double setting, and two armature contacts of every row correspond respectively to last row's fixed contact and following row's fixed contact.