JPH0564396A - Rotary electric machine - Google Patents

Abstract

PURPOSE:To prevent a rotary electric machine from being large-sized or to do away insertion of spacers by making the conductor of a winding stored in the same slot as a slot which stores a measurement resistor thinner than a winding stored in another slot. CONSTITUTION:The number of turns of the stator winding 4 of a stator slot 3 is reduced only in its part of fitting a measurement resistor 6 into the number of turns of a stator winding 4 by a factor of inserting the measurement resistor 6. Many stator slots 3 fitted with no measurement resistors 6 should each have the same area as that of the conductor cross-section of a stator winding as using no measurement resistors 6. This design can prevent a rotary electric machine from being large-sized by fitting a winding temperature monitor measurement resistor or do away spacers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for storing a resistance temperature detector used for monitoring the temperature of a winding of a rotary electric machine.

[0002]

2. Description of the Related Art In order to protect the temperature of a rotating electric machine winding, a thermocouple or a resistance temperature detector may be attached to monitor the temperature. Generally, a resistance thermometer is used in many cases, and a vertical cross-sectional view of a rotating electric machine showing the mounting method of the resistance thermometer used for the conventional temperature monitoring of the stator winding and the main part of the stator. 4 and 5 are cross-sectional views of FIG. Regarding the mounting position of the resistance temperature detector, it is necessary to store it in the part where the temperature becomes the highest, so it is generally inserted between the upper coil and the lower coil of the stator winding 4 as shown in FIG. Target. On the other hand, since the number of RTDs 6 to be mounted is usually only one or two for each phase, spacers 7 are inserted in many other stator slots 3 to leave a space in the stator slots 3. I was adjusting.

[0003]

In the conventional method of attaching the resistance temperature detector described above, the resistance temperature detector 6 is placed in the stator slot 3.
Since it is necessary to provide a space for storing the
Was provided with a space for storing. For this reason, it is necessary to upsize the rotating electric machine because copper loss increases as compared with the rotating electric machine in which the resistance temperature detector 6 is not attached. Further, the resistance temperature detector 6 is usually installed in a small number of one or two for each phase, and many stator slots 3 in which the resistance temperature detector 6 is not installed.
It was necessary to insert a spacer 7 in the to adjust the gap of the stator slot 3, and it was necessary to perform a very wasteful work.

The present invention has been made in view of the above circumstances, and an object of the present invention is not to increase the size of a rotating electric machine by mounting a resistance temperature detector, and to eliminate the insertion of a spacer. ..

[0005]

According to the present invention, there is provided a rotating electric machine for mounting a resistance temperature detector used for temperature monitoring of a winding,
Only the wire size of the winding wire of the slot where the resistance temperature detector is installed is made thin enough to accommodate the resistance temperature sensor, and the windings of other slots are the same as when the resistance temperature sensor is not stored. Two types of wire having different wire sizes are provided.

[0006]

According to the method of mounting the resistance temperature detector used for monitoring the temperature of the winding according to the present invention, the space of the winding slot required for mounting the resistance temperature detector is smaller than that of the mounting portion of the resistance temperature detector. Since there is only a winding slot, the increase in copper loss is smaller than in the past, and it is possible to prevent the size of the rotating electrical machine from increasing.

Further, the slot winding of the mounting portion has a smaller conductor cross-sectional area than the other slot windings, so that copper loss increases at that portion. Therefore, the measured temperature is higher than other parts, and the highest temperature of the winding can be measured.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be shown and described. Figure 1
FIG. 2 is a vertical sectional view of a rotating electric machine showing a method of mounting a resistance temperature detector used for monitoring the temperature of a stator winding of the present invention, and FIG. 2 is a horizontal sectional view of a main part of the stator.

According to the method of mounting the resistance temperature detector 6 of the present invention, the number of windings of the stator winding 4 of the stator slot 3 is reduced only in the stator slot 3 of the portion where the resistance temperature detector 6 is mounted. The number of windings of the stator winding 4 is set to the extent that the body 6 can be inserted. Therefore, many stator slots 3 to which the resistance temperature detector 9 is not attached have the same conductor cross-sectional area of the stator winding when the resistance temperature detector 6 is not used.

As a result, it is possible to minimize the reduction in the conductor cross-sectional area of the winding due to the attachment of the resistance temperature detector 6, and to minimize the size increase of the rotating electric machine. Further, it is not necessary to insert the spacer 7 of the stator slot 3 to which the resistance temperature detector 6 is not attached. Regarding the problems of resistance, reactance, and magnetic balance, there is no problem because the resistance temperature detectors 6 are mounted in the same number each and the mechanical angles are 120 °. (Other embodiments)

As another embodiment of the present invention, in a lap winding or the like in which the number of poles is 4, the number of slots of the stator slots is 60, and the winding pitch is from # 1 to # 14, a winding conductor is used. There is a method of mounting a resistance temperature detector of a rotating electric machine with a fractional number.

One example thereof is shown in FIG. In the figure, a small one indicates a winding having a smaller number of winding turns, and a larger one indicates a winding having a larger number of winding turns. According to the way the stator winding 4 is housed, the stator slots 3 such as # 2, # 7, and # 12 have small upper and lower windings of the stator winding 4, and have small and large windings. There is space for the size difference. The temperature measuring resistor 6 is attached using this space.

As a result, since it is not necessary or necessary to secure the space required for mounting, the reduction of the conductor cross-sectional area of the winding can be minimized and the size of the rotating electric machine can be minimized. You can

[0014]

As is clear from the above description, by mounting the resistance temperature detector for monitoring the winding temperature of the rotary electric machine according to the present invention, the size increase of the rotary electric machine can be minimized. ..
It is also possible to eliminate the spacer.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a rotary electric machine to which a resistance temperature detector is attached according to an embodiment of the present invention,

FIG. 2 is a cross-sectional view of the main part of the stator,

FIG. 3 is a development view of a stator winding showing another embodiment,

FIG. 4 is a view equivalent to FIG. 1 of the related art,

FIG. 5 is a view corresponding to FIG. 2 of the related art.

[Explanation of symbols]

 1 ... Stator frame 2 ... Stator core 3 ... Stator slot 4 ... Stator winding 5 ... Wedge 6 ... RTD 7 ... Spacer

Claims (2)

[Claims] 1. In a rotating electric machine having a slot in which a resistance temperature detector for monitoring the temperature of a winding of a rotating electric machine is housed, the thickness of the conductor of the winding in which the resistance temperature sensor is housed in the same slot as the housing slot is set. A rotating electrical machine characterized by being thinner than the windings stored in other slots. 2. In a rotating electric machine having a slot for storing a resistance temperature detector for monitoring the temperature of a winding of a rotating electric machine, the number of windings of the winding wire that fits in the same slot as the slot for storing the resistance temperature detector is determined. A rotating electrical machine characterized by reducing the number of turns of the windings stored in other slots.