CN102832764A

CN102832764A - Encapsulation configuration of linear motor coil

Info

Publication number: CN102832764A
Application number: CN2011101621725A
Authority: CN
Inventors: 邓朝钦; 萧舜兴; 王湘茹
Original assignee: Hiwin Mikrosystem Corp
Current assignee: Hiwin Mikrosystem Corp; Hiwin Technologies Corp
Priority date: 2011-06-16
Filing date: 2011-06-16
Publication date: 2012-12-19

Abstract

The invention provides an encapsulation configurationof a linear motor coil. The encapsulation configuration comprises an iron core which is provided with a plate-shaped jaw part, a plurality of teeth which are protruded upwards with a preset height from the plate surface of the upper side of the jaw part in equal separation distance, a plurality of grooves which are respectively formed between the adjacent two teeth, a plurality of coils which are wound on each corresponding tooth and contained in the corresponding grooves beside the wound teeth, and an encapsulation layer for wrapping the coils and isolating the coils from outside, wherein at least 0.5mm of height difference is formed between the top end face of the encapsulation layer and the top end face of the adjacent tooth; and the top end face of the encapsulation layer is lower than the top end face of the adjacent tooth. The encapsulation construction has the benefits that when the volume of the coil is changed due to thermal expansion, the interference between a stator and a rotor of the linear motor is avoided. Therefore, the operation of the motor is smooth..

Description

The encapsulation configuration of linear motor coil

Technical field

The present invention relates to a kind of linear motor structure, refer to a kind of stator of avoiding causing and the linear motor structure of rotor interference problem especially because of the coil thermal expansion.

Background technology

Linear motor (Linear Motors) is the expansion of the rotor (Rotor) of general rotary-type motor, stator (Stator) and air gap (Air Gap) being made straight line; Utilize electric energy directly to convert the thrust generating apparatus of straight line kinetic energy into; Because it has the straight-line usefulness of direct driving load generating; Be with do not need as as the rotation motor; Need through action direction, and can save the abrasion phenomenon between the switching mechanism, improve conversion efficiency and reliability like switching mechanisms such as cam, belt, driving screw, gear, tooth bar conversion power.

Though linear motor has high conversion rate compared to rotation motor, in energy-conservation viewpoint; It still is necessary on utilization efficiency of energy again for improving; Thereby the purpose that meets energy-saving application, and the intrinsic many ways of technological means of improving moyor are such as reduce magnetic hysteresis and eddy current loss through material chosen; The lengthening iron core is to reduce magnetic flux density, increase heat-sinking capability, to reduce magnetization and load loss; Improve cooling effectiveness and reduce the motor temperature rise, thereby dwindle width of air gap to reduce magnetizing current and improve the motor power factor and reduce load current etc., be the concrete technology contents of effective raising motor power.

And wherein; Dwindling width of air gap is for improving the effective means of motor power admittedly; But under too small width of air gap, the coil after the motor operation promptly has the volume that causes because of thermal expansion to increase, and invades in the air gap and produces the interference problem between stator and mover; Cause the obstruction on the motor operation, in addition improved necessity is arranged in fact.

Summary of the invention

The objective of the invention is to improve the deficiency of prior art, the encapsulation configuration of the linear motor coil of a kind of stator of avoiding causing because of the coil thermal expansion and rotor interference problem is provided.

For realizing above-mentioned purpose, the present invention adopts following technical scheme:

A kind of encapsulation configuration of linear motor coil includes:

One iron core, it has a tabular jaw portion, several teeth, be each other equally spacedly respectively from jaw portion epipleural towards the predetermined height of last projection, several trough is respectively between adjacent bidentate;

Several coils are set around respectively on the said tooth of a correspondence, and are housed inside in the corresponding groove of institute's winding tooth side;

One encapsulated layer in order to each said coil is coated and makes it to be hedged off from the outer world;

The top end face of said encapsulated layer and have at least 0.5 millimeter difference in height between the top end face of adjacent said tooth, and make the top end face of this encapsulated layer be lower than the top end face of adjacent said tooth.

Difference in height between said encapsulated layer and adjacent teeth is between 0.5 millimeter to 1 millimeter.

Said encapsulated layer is to wrap up in epoxy resin to be applied to corresponding coil and through hardened forming.

Beneficial effect of the present invention is: when coil produces change in volume because of thermal expansion, can not make to produce interference between linear motor mover and the rotor, thereby avoid hindering the running of motor.

Description of drawings

Fig. 1 is the stereo appearance figure of the present invention's one preferred embodiment.

Fig. 2 is the cutaway view of the present invention's one preferred embodiment along the 2-2 secant of Fig. 1.

Fig. 3 is the cutaway view of the present invention's one preferred embodiment along the 3-3 secant of Fig. 1.

Embodiment

See also shown in each figure, in the present invention's one preferred embodiment the encapsulation configuration 10 of the linear motor coil that provides be comprised a pedestal 20 is arranged, an iron core 30, several coils 40 and an encapsulated layer 50.

This pedestal 20 is that pedestal 21, one alcoves 22 with a suitable thickness are arranged with on the seat surface of the top side of this pedestal 21.

This iron core 30 has a tabular jaw portion 31; Be that following lateral plates is set in the alcove 22 that is fixedly arranged on this pedestal 20; Several en plaque teeth 32 are parallel and up extend identical height from the epipleural face of this jaw portion 31 respectively equally spacedly that several trough 33 is to lay respectively at 32 of adjacent bidentates.

Respectively this coil 40 is set around on the corresponding teeth 32 through an insulation external member 41 respectively, and is housed inside in two corresponding grooves 33 of institute's winding tooth 32 sides.

This encapsulated layer 50 is to be material with epoxy resin; Wrap up in and be applied to respectively these coil 40 outsides and through hardened forming; With so that respectively this coil 40 encapsulated and be hedged off from the outer world; And for ease of the carrying out of packaging operation, this encapsulated layer 50 is to be formed as the size on a large scale that is enough to coat respectively this iron core 30 and coil 40.

So far, about the concrete technology that above-mentioned respectively this composed component is bonded to each other, be to have disclosed identical with prior art; And with regard to technical characterictic of the present invention; Then be top end face and the tool to each other between the top end face of respectively this tooth 32 of double altitudes that further makes this encapsulated layer 50, have one between 0.5 millimeter difference in height d, and make the top end face of this encapsulated layer 50 be lower than the respectively top end face of this tooth 32 to 1 mm size; In view of the above; Change in volume when this coil 40 respectively produces because of thermal expansion after running causes when this encapsulated layer 50 produces the increase of volume thereupon, through the existence of this difference in height d; Can remedy the change in location that these change in volume cause; Avoid the top end face of this encapsulated layer 50 to protrude in the respectively top end face of this tooth 32, to guarantee existing of the inter-air space, to use that solving prior art is reaching the technical existing interference problem that improves motor power through dwindling the air gap size.

And; Improving the technological means of motor power through dwindling air gap, through technology contents provided by the present invention, is to can be applicable to than in the littler kind of air-gap design of prior art; And still can guarantee between stator and mover not give birth to the problem of interfering; Make the lifting of motor power be able to have better effect than prior art, apparently, technology contents provided by the present invention really has outstanding technical characterictic and obvious improvement effect.

Claims

1. the encapsulation configuration of a linear motor coil includes:

It is characterized in that:

2. the encapsulation configuration of linear motor coil according to claim 1 is characterized in that the difference in height between said encapsulated layer and adjacent teeth is between 0.5 millimeter to 1 millimeter.

3. the encapsulation configuration of linear motor coil according to claim 1 or claim 2 is characterized in that, said encapsulated layer is to wrap up in epoxy resin to be applied to corresponding coil and through hardened forming.