CN86200693U

CN86200693U - Photoetched copper foil thermal resistance for measuring of temperature of electric motor

Info

Publication number: CN86200693U
Application number: CN 86200693
Authority: CN
Inventors: 于德厚; 杨树勋
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-02-01
Filing date: 1986-02-01
Publication date: 1986-09-17

Abstract

The utility model adopts a structure of photoetched copper foil which substitutes for the structure of filament winding. A thermal resistor which is adopted by the utility model is made by the methods of pictures taking and plate making, printing and exposing, developing and film fixing, corroding, hole forming and assembling and testing and sealing. A photoetched copper foil thermal resister for measuring temperature of an electric machine is composed of a sensor which is manufactured through spreading the copper on both faces of the same piece of epoxy glass cloth in photoetched mode, an insulating board which is arranged in the middle part, a transitional conducting body which is formed by forming holes and wires.

Description

Photoetched copper foil thermal resistance for measuring of temperature of electric motor

The invention belongs to temperature element.

In order accurately to grasp the heating situation that motor is in operation, often in stator winding and iron core, bury the thermometric thermal resistance underground, so that measure the medial temperature at this place, this resistance is according to the design of the characteristics of motor, generally be flat, its thickness is less than filler strip in the middle of the winding, and length is near the length of every iron leg core, and width is less than the groove width of iron core.

At present, the used thermal resistance of China adopts filament wounding construction usually, and it is simple that it has technology, the advantage that cost is low, but in motor operation course, because the vibration of stator winding, it just seems, and physical strength is little, and earthquake-proof function is low, and fatigue lifetime is short.

The objective of the invention is to satisfy motor in operational process, because the vibration of stator winding requires thermal resistance that stronger physical strength is arranged, earthquake-proof function is good, and fatigue lifetime is long.

Invention is achieved in that with the photoetching Copper Foil and replaces filament wounding construction to make sensor.

Below with reference to accompanying drawing invention is described in further detail.

Fig. 1 is the sensor that there is contact at a kind of two ends of the present invention.

Fig. 2 is the sensor that an a kind of end of the present invention has contact.

Fig. 3 is the longitudinal sectional drawing of combine and assemble structure of the present invention.

Fig. 4 is an outline dimensional drawing of the present invention.

(a) is epoxy glass fabric among the figure, and (b) is temperature sensor.Such sensor is pressed Fig. 3 combination, and (1) has the sensor (as shown in Figure 1) of contact for two ends among the figure, and (2) are the sensor (as shown in Figure 2) that an end has contact, (3) be the intermediate insulation plate, (4) be transition conductor, (5) are insulator, and (6) are insulated conductor.

The thermometric that adopts the epoxy glass fabric coating foil to make sensor is produced like this with photoetching Copper Foil thermal resistance: the making sheet of 1, taking pictures---become base plate with the figure that amplifies 5 to 10 times by the contraction of taking pictures; 2, print exposure---print with base plate exposure on the epoxy glass fabric that photosensitive material is arranged is copper-clad; 3, the solid film of development---put into developing fixing in the developer solution earlier, put into solid film in the hardening bath again; 4, corrosion---corrode with the ferric trichloride corrosive liquid; 5, cut out---cut by the overall dimension requirement and make sensor; 6, assembling---with two ends the sensor of contact and insulcrete of sensor therebetween that one one end has contact are arranged, with transition conductor welding series connection, there is on two contacts of the other end of sensor of contact in the welding respectively one two to thoroughly do away with the edge lead at two ends; 7, test---outward appearance detect qualified after, measure its resistance value more whether in claimed range; 8, encapsulation---at last with epoxy resin and epoxy mica powder glass cloth parcel hot forming.

This photoetching Copper Foil thermal resistance also can be used for other local use.

For example: become base plate (to be of a size of: α=0.07 millimeter by the contraction of taking pictures with the figure that amplifies 10 times, the r=0.06 millimeter, β=9.58 millimeter, see Fig. 1 for details), apply (surface scribbles photosensitive material) exposure printing on 0.5 millimeter epoxy glass fabric at Copper Foil with 0.02 millimeter, put into developing fixing in the developer solution, put into solid film in the hardening bath again, corrode with the ferric trichloride corrosive liquid, general Copper Foil partly is called temperature sensor, its length is made 100 or 50 millimeters, apart from the size at two ends such as the B among Fig. 4, D can be respectively 10,30,60,90 millimeters, be cut into sensor, the insulcrete that one 0.5 millimeter of the sensor of contact and sensor therebetween that one one end has contact is arranged with two ends, an end that has contact with the transition conductor welding respectively, connect, on two contacts of the other end of the sensor that contact is arranged, connect one with soldering respectively, two thoroughly do away with edge tetrafluoro line, its length generally is decided to be 150 millimeters, specific (special) requirements can extend, after the outward appearance range estimation is qualified, whether the resistance value that detects again in the time of 0 ℃ is 53 ohm, at last with epoxy resin and epoxy mica powder glass cloth parcel hot forming, the every limit of the thickness of its encapsulation all is not more than 0.5 millimeter, and gross thickness is not more than 2.5 millimeters like this.

Claims

1, a kind of motor thermometric is characterized in that having the sensor [1] of contact, sensor [2], intermediate insulation plate [3], transition conductor [4], insulator [5] and the insulated conductor [6] that an end has contact to form by two ends with photoetching Copper Foil thermal resistance.

2, motor thermometric according to claim 1 is with photoetching Copper Foil thermal resistance, it is characterized in that sensor (1), (2) are made by the epoxy glass fabric coating foil.