SU754575A1 - Electric machine - Google Patents

Description

The invention relates to electrical engineering, nickname and can be used in electric machines of alternating current.

A known electric machine contains a heat exchanger, a fan and a stator with a winding and a core of elements made in the form of packages, some of which have slot ventilation ducts located between the winding and the walls of the slots, and the other sub-vent ventilation ducts (Ϊ).

The disadvantage of the design is the low cooling efficiency due to the fact that the refrigerant does not come into contact with the stator winding along its entire length.

Also known is an electric machine with a heat exchanger, a fan and a stator with a winding and a core made of packages, some of which have slotted ventilation ducts located between the winding and the walls of the slots, others - sub-duct ventilation ducts, and still others - slotted

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located between the winding and the side walls of the grooves [2].

The disadvantage of the design is the uneven cooling along the length of the electric machine.

⁵ The purpose of the invention is to increase the cooling efficiency.

This goal is achieved by the fact that the core has in the middle of an additional channel connecting KA10

The bulk of the first and above types of packages with a heat exchanger.

FIG. 1 shows a longitudinal rae _ί5 cut of the proposed electric machine; in fig. 2 is a section AA in FIG. 1 package with podpazovym vent; in fig. 3 shows a section BB in FIG. 1 in a package with a slot ventilation channel; in fig. 4 shows a section B-B in FIG. 1 in a package with a slot ventilation channel located between the winding and the side walls of the grooves; in fig. 5 is a section of YYD in FIG. one

3,754

over core with additional channel.

In the middle part of the core 1 of the stator between the package 2 with the slot ventilation channels 3, located between the winding 4 and the side * walls 5 and the package 6 with the slot ventilation channels 7, an additional element 8 is placed with channel 9. Between the packages 6 alternating with each other along the length of the core there are packages 2 and packages 10 with sub-vent ventilation channels 11.

These channels of packages 10, located on the side of the frontal parts) 12 and 13 of winding 4 communicate with chambers 14 and 15 of the frontal parts of the stator winding and slot ventilation channels 7 of packages 6, and channels 11 of the same packages 10 located in the middle part core I of the stator, communicate with the slot ventilation channels 7 of adjacent packages 6. Slot ventilation channels 7 of packages 6 communicate with slot ventilation channels 3 of packages 2. Channel 9 of additional element 8; as well as the chambers of the frontal parts 14 and 15 communicate with the annular space of the heat exchanger 1.6; in the cockrotor, the guiding walls 17 are installed.

The internal fan 18 is located on the shaft of the rotor 19, made with axial ventilation channels 20.

The electric machine works as follows.

Coolant fan 18 is fed into the annular space of the heat exchanger 16 and after cooling enters the chamber 14 of the frontal parts 12 of the stator winding and parallel to the channel 9 additional 75 4

body element. 8. From '· camera 14

coolant flow after passing axial

channels C, 7, 3, 7, etc., are connected to the refrigerant flow passing through channel 9. Then, passing along the core through channels 7,3,7 and 11, the coolant flows into the chamber 15 of the frontal parts 13 of the stator winding 4. It also comes coolant from the channels 20 of the rotor 19. Of

In chamber 15, the refrigerant is again directed to the fan 18. Thus, the circulation path of the internal refrigerant is closed.

The proposed design elektri1 ₅ cal machines with smaller dimensions and weight also provides high cooling efficiency of its active parts and increases the machine efficiency.

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Claims (1)

Claim An electric machine containing a heat exchanger, a fan and a stator with a winding and a core of elements, 25 made in the form of packages, one of which have slot ventilation ducts located between the winding and groove walls, others - sub-duct ventilation ducts, and the third - slot grooves located between the winding and side walls of the grooves, characterized by the fact that the core has middle part 35 an additional channel connecting the channels of the first of the mentioned types of packages with a heat exchanger.