JP7285097B2 - Open wound motors, compressors, and refrigeration cycle equipment - Google Patents

Description

The present invention relates to open wound motors, compressors, and refrigeration cycle devices.

2. Description of the Related Art An open-wound motor having three-phase (U-phase, V-phase, and W-phase) windings that are electrically separated from each other is known. In an open-winding motor, the windings for each phase are independent and unconnected. One end of each phase winding is connected to a first lead wire, and the other end of each phase winding is connected to a second lead wire. The first lead wire and the second lead wire are drawn out of the motor.

The open-winding motor includes a first inverter circuit connected to one end of each phase winding via a first lead wire, and a first inverter circuit connected to the other end of each phase winding via a second lead wire. and a second inverter circuit connected to the end of the drive circuit.

JP 2018-50363 A

In a 9-slot type open-winding motor, each phase winding is wound around three teeth. A first lead wire for each phase and a second lead wire for each phase connect three windings in parallel. That is, for each phase, the first lead wire and the three windings are connected at three points, and the second lead wire and the three windings are connected at three points. Therefore, there are a total of 18 connection points for all three phases.

Such a large number of connection points increases the labor of the work. An increase in work time and effort may lead to quality deterioration due to work errors such as connection errors, and quality deterioration due to variations in work for each connection point.

However, conventional open-winding motors do not disclose specific aspects of connection between these lead wires and windings.

Therefore, the present invention has a 9-slot concentrated winding stator, and enables the winding to be wound with a simple structure. An object of the present invention is to provide a wound-wound motor, a compressor using this open-wound motor, and a refrigeration cycle device.

In order to solve the above problems, an open winding motor according to an embodiment of the present invention includes a cylindrical stator and a rotor disposed inside the stator, wherein the stator is cylindrical a yoke, an iron core having nine teeth that protrude inward from the yoke and are arranged in the circumferential direction at intervals, a plurality of insulating end plates provided on both axial end surfaces of the iron core, the teeth and the a winding wound between an insulating end plate, wherein the nine teeth have three sections in which the adjacent three-phase windings are arranged in the same order, and the windings are independent for each phase and three independent windings wound continuously around three teeth. A connecting wire extending to the tooth, a portion wound around the second tooth, a connecting wire extending from the second tooth to the third tooth, a portion wound around the third tooth, and a terminal wire at the end of the winding are continuous. Two stators are provided for each phase, and the terminal wires and the crossover wires of the windings are electrically connected at two locations to connect the windings of the three slots in parallel. It has a terminal to

Further, a compressor according to an embodiment of the present invention includes a closed container, a compression mechanism part housed in the closed container and capable of compressing a refrigerant introduced into the closed container, and housed in the closed container, and the open-winding motor that drives the compression mechanism.

Further, in the refrigeration cycle apparatus according to the embodiment of the present invention, the compressor, the radiator, the expansion device, the heat absorber, and the compressor, the radiator, the expansion device, and the heat absorber are connected. and a refrigerant pipe for circulating the refrigerant.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic diagram of the refrigerating-cycle apparatus and compressor which concern on embodiment of this invention. The figure which shows the stator of the electric motor which concerns on embodiment of this invention from the centerline direction of the rotating shaft. 1 is a connection diagram of three-phase windings of an electric motor according to an embodiment of the present invention; FIG. The figure of an example of the insulation displacement terminal of the electric motor which concerns on embodiment of this invention. The top view which shows the wiring state of the connecting wire and terminal wire of the electric motor which concerns on embodiment of this invention. The side view which shows the wiring state of the connecting wire and terminal wire of the electric motor which concerns on embodiment of this invention. FIG. 2 is an exploded view of the stator of the electric motor according to the embodiment of the present invention, viewed from the outer peripheral side. The figure which shows the wiring route of the winding of a U-phase. FIG. 4 is a diagram showing a wiring route of a V-phase winding; FIG. 4 is a diagram showing a wiring route of a W-phase winding;

An embodiment of an open wound motor, a compressor, and a refrigeration cycle apparatus according to the present invention will be described with reference to FIGS. 1 to 10. FIG. In addition, the same code|symbol is attached|subjected to the structure which is the same or corresponds in several drawings.

FIG. 1 is a schematic diagram of a refrigeration cycle device and a compressor according to an embodiment of the invention.

As shown in FIG. 1, a refrigeration cycle device 1 according to the present embodiment includes a hermetic compressor 2, a radiator 3, an expansion device 5, a heat absorber 6, an accumulator 7, and a refrigerant pipe 8. , is equipped with The refrigerant pipe 8 connects the compressor 2, the radiator 3, the expansion device 5, the heat absorber 6, and the accumulator 7 in order, and circulates the refrigerant.

The compressor 2 sucks in the refrigerant that has passed through the heat absorber 6 through the refrigerant pipe 8 , compresses the refrigerant, and discharges high-temperature and high-pressure refrigerant through the refrigerant pipe 8 to the radiator 3 .

The compressor 2 includes a cylindrical sealed container 11 placed vertically, an open winding motor 12 (hereinafter simply referred to as "electric motor 12") arranged in the upper half of the sealed container 11, and a closed container. 11, a rotary shaft 15 that transmits the rotational driving force of the electric motor 12 to the compression mechanism portion 13, a main bearing 16 that rotatably supports the rotary shaft 15, a main and a sub-bearing 17 that cooperates with the bearing 16 to rotatably support the rotating shaft 15 .

The airtight container 11 includes a vertically extending cylindrical body 11a, a panel 11b covering the upper end of the body, and a panel 11c covering the lower end of the body.

A discharge pipe 8a for discharging the refrigerant is connected to the end plate 11b on the upper side of the sealed container 11. As shown in FIG. The discharge pipe 8 a is connected to the refrigerant pipe 8 . Two sealed terminal portions 18 for power supply are provided on the end plate 11b on the upper side of the sealed container 11. As shown in FIG.

The electric motor 12 generates driving force for rotating the compression mechanism portion 13 . The electric motor 12 includes a cylindrical stator 21 fixed to the inner wall of the closed container 11, a rotor 22 arranged inside the stator 21 and fixed to a rotating shaft 15, and a hermetically sealed rotor 22 pulled out from the stator 21. and a plurality of lead wires 23 connected to the terminal portion 18 .

The rotor 22 includes a rotor core 25 having magnet accommodation holes (not shown) and permanent magnets accommodated in the magnet accommodation holes. Rotor 22 is rotatable with respect to stator 21 and fixed to rotating shaft 15 . Rotation centerline C of rotor 22 and rotating shaft 15 substantially coincides with centerline P of stator 21 .

The plurality of lead wires 23 are wires for supplying power to the stator 21 through the sealed terminal portion 18, and are so-called lead wires. A plurality of lead wires 23 are wired according to the type of the electric motor 12 . Six lead wires 23 are wired in this embodiment.

The rotating shaft 15 connects the electric motor 12 and the compression mechanism section 13 . The rotating shaft 15 transmits the rotational driving force generated by the electric motor 12 to the compression mechanism portion 13 .

An intermediate portion 15 a of the rotary shaft 15 connects the electric motor 12 and the compression mechanism portion 13 and is rotatably supported by a main bearing 16 . A lower end portion 15 b of the rotating shaft 15 is rotatably supported by a sub-bearing 17 . The main bearing 16 and the sub-bearing 17 are also part of the compression mechanism section 13 . In other words, the rotating shaft 15 passes through the compression mechanism portion 13 .

The rotary shaft 15 also has an eccentric portion 26 between the intermediate portion 15 a supported by the main bearing 16 and the lower end portion 15 b supported by the sub-bearing 17 . The eccentric portion 26 is a disc or cylinder having a center that does not coincide with the rotation centerline of the rotating shaft 15 .

The compression mechanism section 13 can compress a refrigerant, that is, a single refrigerant or a mixed refrigerant. When the electric motor 12 rotates the rotary shaft 15 , the compression mechanism section 13 sucks gaseous refrigerant from the refrigerant pipe 8 , compresses it, and discharges it into the sealed container 11 .

The compression mechanism portion 13 includes a cylinder 32 having a circular cylinder chamber 31, an annular roller 33 arranged in the cylinder chamber 31, and reciprocating motions in contact with the outer peripheral surface of the roller 33, and moves in the cylinder chamber 31 into the suction chamber. and a blade 37 partitioning into a compression chamber.

The cylinder 32 is fixed to the sealed container 11 at a plurality of points by welding, for example, spot welding.

The cylinder chamber 31 is a space inside the cylinder 32 and is closed by the main bearing 16 and the sub-bearing 17 . The cylinder chamber 31 accommodates the eccentric portion 26 of the rotating shaft 15 .

The main bearing 16 is fixed to the cylinder 32 with a fastening member 34 such as a bolt. The main bearing 16 is provided with a discharge valve mechanism (not shown) for discharging refrigerant compressed in the cylinder chamber 31 and a discharge muffler 35 covering the discharge valve mechanism. The discharge valve mechanism opens the discharge port when the pressure difference between the pressure in the cylinder chamber 31 and the pressure in the discharge muffler 35 reaches a predetermined value due to the compression action of the compression mechanism 13 to release the compressed refrigerant. is discharged into the discharge muffler 35 . The discharge muffler 35 has a discharge hole (not shown) connecting the inside and outside of the discharge muffler 35 . The compressed refrigerant discharged into the discharge muffler 35 is discharged into the sealed container 11 through the discharge hole.

The secondary bearing 17 is fixed to the cylinder 32 with a fastening member 36 such as a bolt.

The roller 33 is fitted on the peripheral surface of the eccentric portion 26 . The outer peripheral surface of the roller 33 is in line contact with the inner peripheral surface of the cylinder chamber 31 . As the rotating shaft 15 rotates, the roller 33 moves eccentrically while its outer peripheral surface is in line contact with the inner peripheral surface of the cylinder chamber 31 .

The contact between the roller 33 and the cylinder 32 is not a direct contact, but an indirect one with an oil film (not shown) of the lubricating oil 39 interposed. The contact made is simply referred to as "contact". The same applies between roller 33 and eccentric 26 , between roller 33 and main bearing 16 , and between roller 33 and sub-bearing 17 .

The suction pipe 7 a is connected to the cylinder chamber 31 of the cylinder 32 through the closed container 11 . The cylinder 32 is provided with a suction hole (not shown) that is connected to the suction pipe 7 a and reaches the cylinder chamber 31 .

The lower portion of the sealed container 11 is filled with lubricating oil 39 . Most of the compression mechanism 13 is immersed in the lubricating oil 39 inside the sealed container 11 .

Next, the stator 21 of the electric motor 12 will be described in detail.

FIG. 2 is a diagram showing the stator of the electric motor according to the embodiment of the present invention from the centerline direction of the rotating shaft.

As shown in FIG. 2 in addition to FIG. 1, the electric motor 12 according to this embodiment is of the three-phase nine-slot type.

The stator 21 is a concentrated winding stator. The stator 21 includes a stator core 43 having a cylindrical yoke 41 (so-called yoke) and nine teeth 42 protruding inward from the yoke 41 and arranged in the circumferential direction at intervals. The stator 21 is wound between two insulating end plates 45 provided on each end surface of the stator core 43, a plurality of insulating thin plates (not shown), and the teeth 42 and the two insulating end plates 45. and a winding 48 which is

The direction of the centerline P of the stator 21 is called "axial direction". A centerline P of the stator 21 substantially coincides with a rotation centerline C of the rotor 22 . In a plane perpendicular to the center line P of the stator 21, the direction passing through the center line P of the stator 21 is called the "radial direction", and the circumferential direction around the center line P of the stator 21 is called the "circumferential direction". called "direction".

The stator core 43 has a plurality of thin plates (not shown) laminated and integrated in the axial direction. The thin plate is an electromagnetic steel plate punched by a press or the like. The stator core 43 has a pair of parallel end faces 43a, 43b. The normal lines of the pair of end faces 43a and 43b are oriented in the axial direction. One end surface 43 a of the stator core 43 is close to the upper surface of the stator 21 , that is, the upper end plate 11 b of the sealed container 11 . The other end surface 43b of the stator core 43 is closer to the lower surface of the stator 21, that is, to the lower end plate 11c of the sealed container 11, and closer to the compression mechanism section 13 than the one end surface 43a. A first insulating end plate 45A is provided on one end face 43a, and a second insulating end plate 45B is provided on the other end face 43b.

The centerline of the tubular yoke 41 matches the centerline P of the stator 21 .

The nine teeth 42 are arranged radially at substantially equal intervals in the circumferential direction. Each tooth 42 extends radially inward from the yoke 41 . Each tooth 42 has a tooth base portion 42a extending radially inward from the yoke 41, and a tooth tip portion 42b provided on the tip side of the tooth base portion 42a and extending in the circumferential direction. The tooth tip portion 42 b has a tooth tip surface 42 c facing the inner side of the yoke 41 , in other words, facing the stator 21 .

Teeth tip surface 42c is formed in an arc shape centering on center line P of stator 21 . The rotor 22 is arranged in a rotor housing space 43c defined by a plurality of tooth tip surfaces 42c. A gap is provided between the outer peripheral surface of the rotor 22 and the tooth tip surface 42c.

The yoke 41 and two circumferentially adjacent teeth 42 define a slot 49 . There are the same number of slots 49 as the teeth 42, ie, nine. The slot 49 has a slot opening between the tooth tips 42b of two adjacent teeth 42. As shown in FIG.

Further, the stator core 43 has a first hole (not shown) extending from one end face 43a of the stator core 43 to the other end face 43b. The first holes are arranged at the outer peripheral edge of the stator core 43 and at the base of the teeth 42 . The first hole extends substantially parallel to the centerline P of the stator 21 .

The insulating end plate 45 is made of polybutylene terephthalate (PBT), liquid crystal polymer (LCP, semi- or wholly aromatic polyester), polyphenylene sulfide (PPS), or polyamide (PA), for example. It is a molded product. First, the configuration common to the two insulating end plates 45 will be described. Therefore, in the following description, description of the second insulating end plate 45B is omitted, and only the first insulating end plate 45A is described.

The first insulating end plate 45A includes an annular outer wall member 51, a plurality of inner wall members 52 arranged inside the outer wall member 51 and arranged in the circumferential direction at intervals, the outer wall member 51, and the respective inner wall members 52. and a plurality of connecting members 53 to be connected.

The outer wall member 51 is a radially thin, axially extending, circumferentially continuous ring. It should be noted that it may have a substantially ring shape that is discontinuous in the circumferential direction.

Each inner wall member 52 is an arcuate plate that is thin in the radial direction and extends in the axial and circumferential directions. The plurality of inner wall members 52 are arranged annularly.

The connecting member 53 spans between the inner peripheral surface of the outer wall member 51 and the radial outer surface of the inner wall member 52 .

The outer wall member 51 , the inner wall member 52 , and the connecting member 53 define a space that accommodates the windings 48 .

Also, the first insulating end plate 45A has an end face (not shown) in contact with the end face 43a of the stator core 43. As shown in FIG. The end face of the first insulating end plate 45A straddles the outer wall member 51, the inner wall member 52, and the connecting member 53. As shown in FIG.

A space defined by the outer wall member 51 , two adjacent inner wall members 52 and the connecting member 53 is connected to the slots 49 of the stator core 43 .

The outer wall member 51, the inner wall member 52, and the connecting member 53 of the first insulating end plate 45A are arranged so as to be adjacent to the yoke 41 of the stator core 43, the tooth tip portions 42b, and the tooth base portions 42a of the teeth 42, respectively. .

In addition, the inner peripheral surface 52a of the inner wall member 52 does not protrude toward the rotor 22, that is, radially inward from the tooth tip surface 42c of the tooth 42. As shown in FIG. In addition, the radially outer surface 51a (outer peripheral surface 51a) of the outer wall member 51 does not project radially outward from the outer peripheral surface 41a of the yoke 41 .

The tooth tip surface 42 c is the inner peripheral surface of the stator core 43 , and the outer peripheral surface 41 a of the yoke 41 is the outer peripheral surface of the stator core 43 . The inner peripheral surface 52a of the inner wall member 52 is the inner peripheral surface of the first insulating end plate 45A, and the outer peripheral surface 51a is the outer peripheral surface of the first insulating end plate 45A.

The insulating lamina is inserted into slot 49 . The thin insulating plate is a sheet of polyethylene terephthalate (PET) or polyethylene naphthalate (PEN), for example. The insulating thin plates protrude axially from the end surfaces 43a and 43b of the stator core 43. As shown in FIG. Therefore, the thin insulating plate prevents poor insulation at the boundary between the end face 43a of the stator core 43 and the first insulating end plate 45A and at the boundary between the end face 43b of the stator core 43 and the second insulating end plate 45B. be able to.

The windings 48 are wound around the tooth bases 42a of the teeth 42 of the stator core 43, the connecting members 53 of the first insulating end plate 45A, and the connecting members 53 of the second insulating end plate 45B by a concentrated winding method.

The windings 48 include a U-phase winding 48U, a V-phase winding 48V, and a W-phase winding 48W. The windings 48 are independent windings that are continuously wound around the three teeth 42 independently for each phase and to which voltages are individually applied. In each phase, the winding direction of the winding 48 alternates for each tooth 42 .

Here, for convenience of explanation, the windings 48 of each phase are numbered in ascending order when viewed in the rotation direction R of the rotor 22 . That is, the U-phase winding 48U has a U-phase first winding 48U1, a U-phase second winding 48U2, and a U-phase third winding 48U3. The V-phase winding 48V has a V-phase first winding 48V1, a V-phase second winding 48V2, and a V-phase third winding 48V3. The W-phase winding 48W has a W-phase first winding 48W1, a W-phase second winding 48W2, and a W-phase third winding 48W3.

U-phase first winding 48U1, U-phase second winding 48U2, and U-phase third winding 48U3 are wound around three teeth 42 in succession. The winding direction of the U-phase second winding 48U2 is opposite to the winding direction of the U-phase first winding 48U1, and the winding direction of the U-phase third winding 48U3 is the winding direction of the U-phase second winding 48U2. is the opposite direction of When the windings 48 are viewed from the outer peripheral side of the stator 21, for example, the U-phase first winding 48U1 is wound to the right (clockwise) and the U-phase second winding 48U2 is wound to the left (counterclockwise). U-phase third winding 48U3 is wound to the right (clockwise). The same applies to the V-phase winding 48V and the W-phase winding 48W, and the description thereof is omitted.

The windings 48 are arranged at equal intervals in the circumferential direction for each phase. In other words, the three U-phase windings 48U1, 48U2, and 48U3 are arranged circumferentially every 120 degrees. The same applies to the V phase and W phase. That is, there are three sections (three regions) in which adjacent three-phase windings 48 are arranged in the same order. In this embodiment, the stator 21 has a U-phase first winding 48U1, a V-phase first winding 48V1, and a W-phase first winding 48W1 arranged in this order in the rotation direction R of the rotor 22. A first section 55A, a U-phase second winding 48U2, a V-phase second winding 48V2, and a W-phase second winding 48W2 arranged in this order, a second section 55B, a U-phase third winding 48U3, and a V-phase second winding 48U3. and a third section 55C in which the second winding 48V2 and the W-phase third winding 48W3 are arranged in that order. The nine teeth 42 are also divided into three sections in which adjacent three-phase windings 48 are arranged in the same order.

The windings 48 according to the present embodiment include a U-phase first winding 48U1, a V-phase first winding 48V1, a W-phase first winding 48W1, and a U-phase second winding when viewed in the rotation direction R of the rotor 22. Line 48U2, V-phase second winding 48V2, W-phase second winding 48W2, U-phase third winding 48U3, V-phase third winding 48V3, and W-phase third winding 48W3 are arranged in this order.

Note that the order of arrangement of the U-phase, V-phase, and W-phase may be different.

FIG. 3 is a connection diagram of three-phase windings of the electric motor according to the embodiment of the present invention.

As shown in FIG. 3, the stator 21 of the electric motor 12 according to the present embodiment is provided with two stators 21 for each phase. 48 (for example, three U-phase windings 48U1, 48U2, 48U3) are connected in parallel.

In other words, the U-phase pressure contact terminal 57U includes two pressure contact terminals 57U1 and 57U2 that conductively connect the two portions of the U-phase winding 48U to connect the three windings 48U1, 48U2, and 48U3 in parallel. there is The V-phase press-contact terminal 57V includes two press-contact terminals 57V1 and 57V2 that conductively connect two locations of the V-phase winding 48V to connect three windings 48V1, 48V2 and 48V3 in parallel. The W-phase press-contact terminal 57W includes two press-contact terminals 57W1 and 57W2 that conductively connect two locations of the W-phase winding 48W to connect three windings 48W1, 48W2 and 48W3 in parallel.

U-phase first insulation displacement terminal 57U1 connects terminal wire 58U1 of U-phase first winding 48U1 and first connecting wire 59U1 between two U-phase windings 48U2 and 48U3. The U-phase first insulation displacement terminal 57U1 is connected to the U-phase first lead wire 23U1.

The U-phase second insulation displacement terminal 57U2 connects the terminal wire 58U2 of the U-phase third winding 48U3 and the second connecting wire 59U2 between the two U-phase windings 48U1 and 48U2. The U-phase second pressure contact terminal 57U2 is connected to the U-phase second lead wire 23U2.

The V-phase first pressure contact terminal 57V1 connects the terminal wire 58V1 of the V-phase first winding 48V1 and the first crossover wire 59V1 between the two V-phase windings 48V2 and 48V3. The V-phase first pressure contact terminal 57V1 is connected to the V-phase first lead wire 23V1.

The V-phase second pressure contact terminal 57V2 connects the terminal wire 58V2 of the V-phase third winding 48V3 and the second crossover wire 59V2 between the two V-phase windings 48V1 and 48V2. The V-phase second pressure contact terminal 57V2 is connected to the V-phase second lead wire 23V2.

The W-phase first pressure contact terminal 57W1 connects the terminal wire 58W1 of the W-phase first winding 48W1 and the first connecting wire 59W1 between the two W-phase windings 48W2 and 48W3. The W-phase first pressure contact terminal 57W1 is connected to the W-phase first lead wire 23W1.

The W-phase second pressure contact terminal 57W2 connects the terminal wire 58W2 of the W-phase third winding 48W3 and the second crossover wire 59W2 between the two W-phase windings 48W1 and 48W2. The W-phase second pressure contact terminal 57W2 is connected to the W-phase second lead wire 23W2.

The U-phase first lead wire 23U1 is connected to the U-phase of the first inverter circuit 61 of the drive circuit (not shown) of the electric motor 12 via one of the two sealed terminal portions 18 . The V-phase first lead wire 23V1 is connected to the V-phase of the first inverter circuit 61 of the drive circuit of the electric motor 12 via one of the two sealed terminal portions 18 . The W-phase first lead wire 23W1 is connected to the W-phase of the first inverter circuit 61 of the drive circuit of the electric motor 12 via one of the two sealed terminal portions 18 . The U-phase second lead wire 23U2, the V-phase second lead wire 23V2, and the W-phase second lead wire 23W2 are connected via the other of the two sealed terminal portions 18 to the second inverter of the drive circuit of the electric motor 12. They are connected to the U-phase, V-phase and W-phase of circuit 62 respectively.

Hereinafter, when describing the relationship between the windings 48, the connecting wires 59, the terminal wires 58, the lead wires 23, the teeth 42, and the slots 49 in each phase of the U phase, the V phase, and the W phase, each phase The windings 48, the connecting wires 59, the terminal wires 58, the lead wires 23, the teeth 42, which are common to the U phase, the V phase, and the W phase. , and slot 49, the symbols U, V, and W for identifying each phase are omitted.

FIG. 4 is a diagram of an example of a pressure contact terminal for an electric motor according to an embodiment of the present invention.

As shown in FIG. 4 , the press contact terminal 57 of the electric motor 12 according to this embodiment connects the crossover wire 59 and the terminal wire 58 . The pressure contact terminal 57 connects the lead wires 23 to three pressure contact protrusions 65 and two pressure contact slots 66 cut in a U shape between adjacent pressure contact protrusions 65 . and a tab 67 for A blade portion is formed on the peripheral edge of the press contact slot 66 .

FIG. 5 is a plan view showing the wiring state of the connecting wire and the terminal wire of the electric motor according to the embodiment of the present invention.

FIG. 6 is a side view showing the wiring state of the connecting wires and terminal wires of the electric motor according to the embodiment of the present invention.

In addition to FIG. 2, as shown in FIGS. 5 and 6, the first insulating end plate 45A on the upper side of the electric motor 12 according to the present embodiment collectively holds the two windings 48 and the insulation displacement terminals 57. A terminal receiving portion 68 is provided.

The terminal receiving portion 68 includes a first terminal receiving portion 69 for holding the pressure contact terminal 57 connected to the first inverter circuit 61 and a second terminal receiving portion for holding the pressure contact terminal 57 connected to the second inverter circuit 62. a portion 70;

The terminal receiving portions 68 are provided on the outer periphery of the teeth 42 at which the winding 48 is started and at the outer periphery of the teeth 42 at which the winding 48 is finished. The terminal receiving portion 68 is arranged on the center line that bisects the teeth 42 in the circumferential direction. The terminal receiving portion 68 includes a holding portion 71 that holds the crossover wire 59 and the terminal wire 58, and an insertion portion 72 into which the pressure contact protrusion 65 of the pressure contact terminal 57 is inserted.

The connecting wire 59 and the terminal wire 58 held by the holding portion 71 are press-fitted into the pressure contact slot 66 of the pressure contact terminal 57 . The covering (not shown) of the crossover wire 59 and the terminal wire 58 is broken by the blade portion of the press contact slot 66 into which the crossover wire 59 and the terminal wire 58 are press-fitted. The crossover wire 59 and the terminal wire 58 are electrically connected via the pressure contact terminal 57 .

The holding portion 71 has two grooves 73 r and 73 l parallel to the center line of the teeth 42 . A connecting wire 59 or a terminal wire 58 to be press-fitted into the press contact slot 66 is arranged in the two grooves 73r, 73l. The two grooves 73r and 73l form the grooves on the right side of the terminal receiving portion 68 when viewed from the outer peripheral side of the stator 21 with the pressure contact protrusion 65 of the pressure contact terminal 57 arranged downward and the tab 67 arranged upward. 73r, and the left side is a groove 73l.

The lead wire 23 is connected to the tab 67 of the pressure contact terminal 57 .

In the electric motor 12 according to this embodiment, the connecting wire 59 between the two windings 48 and the terminal wire 58 of one winding 48 are connected to the lead wire 23 for each phase. Therefore, the electric motor 12 can reduce the number of wires and save time and effort for connection work, compared to the case where the terminal wires of each of the three windings, that is, three terminal wires in total, are connected to one lead wire. can be reduced. Moreover, the electric motor 12 connects the crossover wire 59 and the terminal wire 58 with the press contact terminal 57 having the two press contact slots 66 . Therefore, when connecting the crossover wire 59 and the terminal wire 58, it is not necessary to peel off the films of the crossover wire 59 and the terminal wire 58, which further reduces the time and effort required for the connection work. Moreover, there is no generation of coating pieces due to peeling of the coating. Therefore, in the motor 12, the film pieces do not enter the gaps of the rotating portion of the motor 12, and the performance of the motor 12 is not impaired.

Next, the wiring route of the winding 48 will be explained.

FIG. 7 is a developed view of the stator of the electric motor according to the embodiment of the present invention, viewed from the outer peripheral side.

FIG. 8 is a diagram showing the wiring route of the U-phase winding, omitting the illustration of the V-phase and W-phase in FIG.

7 shows a schematic wiring route of the winding 48. As shown in FIG.

As shown in FIGS. 7 and 8, the U-phase winding 48U of the electric motor 12 according to the present embodiment has a U-phase first terminal disposed on the outer periphery of the teeth 42U3 around which the U-phase third winding 48U3 is wound. The starting end of the U-phase winding 48U is held by the receiving portion 69U and winding is started. Further, the U-phase winding 48U is wound while its end is held by the U-phase second terminal receiving portion 70U arranged on the outer peripheral portion of the teeth 42U1 around which the U-phase first winding 48U1 is wound. U-phase winding 48U starts from U-phase first terminal receiving portion 69U, passes through the outer periphery of teeth 42U2 around which U-phase second winding 48U2 is wound, and U-phase first winding 48U1 is wound around teeth 42U1. be done. After that, the U-phase winding 48U is folded back at the U-phase second terminal receiving portion 70U, and the U-phase second winding 48U2 is wound around the teeth 42U2. Further, the U-phase winding 48U passes through the U-phase first terminal receiving portion 69U and the U-phase third winding 48U3 is wound around the teeth 42U3. It is held in the receiving portion 70U.

The starting end of the U-phase winding 48U, that is, the terminal line 58U1 of the U-phase first winding 48U1, is held in the right groove 73r of the holding portion 71 of the U-phase first terminal receiving portion 69U and starts to be wound. The terminal wire 58U1 of the U-phase first winding 48U1 extends from the U-phase first terminal receiving portion 69U to the outer peripheral side of the tooth 42U2 around which the U-phase second winding 48U2 is wound, below the W-phase second terminal receiving portion 70W2, and It reaches the outer peripheral portion of the tooth 42U1 via below the V-phase second terminal receiving portion 70V2. Then, the terminal wire 58U1 enters the slot 49 from the U-phase first winding first groove 75U1 of the first insulating end plate 45A provided side by side with the tooth 42U1, and reaches the root of the tooth 42U1. Here, U-phase first winding 48U1 is wound around teeth 42U1. The winding end of the U-phase first winding 48U1 continues to the second crossover wire 59U2.

The second connecting wire 59U2 passes through the groove 73r on the right side of the holding portion 71 of the U-phase second terminal receiving portion 70U from the inner peripheral side of the stator 21 to the outer peripheral side, turns back, passes through the slot 49 in the axial direction, It reaches the second insulating end plate 45B. The second crossover wire 59U2 escapes from the slot 49 through the second groove 75U2 for the U-phase first winding of the second insulating end plate 45B, which is juxtaposed to the teeth 42U1, and the teeth 42V1 around which the V-phase first winding 48V1 is wound. and the outer peripheral side of the tooth 42W1 around which the W-phase first winding 48W1 is wound, and reaches the outer peripheral portion of the tooth 42U2. Then, the second crossover wire 59U2 enters the slot 49 from the U-phase second winding first groove 76U1 of the second insulating end plate 45B provided side by side with the tooth 42U2 and reaches the root of the tooth 42U2. Here, U-phase second winding 48U2 is wound around tooth 42U2. The winding end of the U-phase second winding 48U2 continues to the first connecting wire 59U1.

The first connecting wire 59U1 escapes from the slot 49 through the second groove 76U2 for the U-phase second winding of the first insulating end plate 45A, which is juxtaposed to the teeth 42U2, and is connected to the teeth 42V2 around which the V-phase second winding 48V2 is wound. and the outer peripheral side of the tooth 42W2 around which the W-phase second winding 48W2 is wound, and reaches the outer peripheral portion of the tooth 42U3. Then, the first connecting wire 59U1 passes through the left groove 73l of the holding portion 71 of the U-phase first terminal receiving portion 69U from the outer peripheral side to the inner peripheral side of the stator 21, enters the slot 49, and enters the root of the teeth 42U3. reach. Here, U-phase third winding 48U3 is wound around teeth 42U3. The winding end of the U-phase third winding 48U3 continues to the end of the U-phase winding 48U, that is, the terminal wire 58U2 of the U-phase third winding 48U3.

The terminal wire 58U2 escapes from the slot 49 through the groove 77U for the U-phase third winding of the first insulating end plate 45A, which is provided side by side with the tooth 42U3, and extends to the outer peripheral side of the tooth 42V2 around which the V-phase third winding 48V3 is wound. It reaches the outer peripheral portion of tooth 42U1 via the outer peripheral side of tooth 42W2 around which W-phase third winding 48W3 is wound. The terminal wire 58U2 passes through the groove 73l on the left side of the U-phase second terminal receiving portion 70U from the outer peripheral side to the inner peripheral side of the stator 21 and is held. Here, the U-phase winding 48U ends.

FIG. 9 is a diagram showing the wiring route of the V-phase winding, omitting the illustration of the U-phase and W-phase in FIG. 2 .

FIG. 10 is a diagram showing the wiring route of the W-phase winding, omitting the illustration of the U-phase and V-phase in FIG.

As shown in FIGS. 9 and 10 in addition to FIG. 7, the V-phase winding 48V and the W-phase winding 48W also have substantially the same wiring paths as the U-phase winding 48U, so a description thereof is omitted. omitted.

Then, as shown in FIG. 2, a section 55 including the teeth 42 at which the winding 48 is started, that is, a first section 55A, and a section 55 that includes the teeth 42 at which the winding 48 is finished, that is, a third section 55C. are adjacent to each other in the circumferential direction of the stator 21 . First section 55A includes U-phase first winding 48U1, V-phase first winding 48V1, and W-phase first winding 48W1. Third section 55C includes U-phase third winding 48U3, V-phase third winding 48V3, and W-phase third winding 48W3. Therefore, the first section 55A including the teeth 42U1 starting to wind the U-phase winding 48U and the third section 55C including the teeth 42U3 finishing the U-phase winding 48U are separated in the circumferential direction of the stator 21. next to each other. A first section 55A including teeth 42V1 starting winding of V-phase winding 48V and a third section 55C including teeth 42V3 ending winding of V-phase winding 48V are adjacent to each other in the circumferential direction of stator 21. ing. The first section 55A including the teeth 42W1 at which the W-phase winding 48W starts and the third section 55C including the teeth 42W3 at which the W-phase winding 48W ends are adjacent in the circumferential direction of the stator 21. ing.

Therefore, the winding 48 starts from the first terminal receiving portion 69 arranged in the third section 55C, passes through the outer peripheral portion of the teeth 42 of the second section 55B, and is wound around the teeth 42 of the first section 55A. Next, the winding wire 48 is wound around the teeth 42 of the second section 55B via the second terminal receiving portion 70 arranged on the first section 55A. Next, the winding wire 48 passes through the first terminal receiving portion 69 arranged in the third section 55C, is wound around the teeth 42 of the third section 55C, and reaches the second terminal receiving section 70 arranged in the first section 55A. do.

That is, the starting end of the winding 48, that is, the terminal wire 58 of the winding 48 of the first section 55A, and the connecting wire 59 between the winding 48 of the second section 55B and the winding 48 of the third section 55C, The first terminal receiving portion 69 arranged in the third section 55C is connected to the lead wire 23 (first lead wire) via the pressure contact terminal 57 . Also, the connecting wire 59 between the winding 48 of the first section 55A and the winding 48 of the second section 55B, and the terminal end of the winding 48, that is, the terminal line 58 of the winding 48 of the third section 55C, The second terminal receiving portion 70 arranged in the first section 55A is connected to the lead wire 23 (second lead wire) via the pressure contact terminal 57 . Such wiring connects the windings 48 of the three slots 49 of a phase in parallel.

Note that the winding start winding 48 and the winding end winding 48 of each phase do not have to belong to the same section. For example, the U-phase first winding 48U1, the V-phase first winding 48V1, and the W-phase first winding 48W1 may belong to different categories. U-phase third winding 48U3, V-phase third winding 48V3, and W-phase third winding 48W3 may also belong to different categories. In this case, the first terminal receiving portions 69 of each phase do not have to belong to the same division, and the second terminal receiving portions 70 of each phase do not have to belong to the same division.

As described above, the refrigeration cycle apparatus 1, the compressor 2, and the electric motor 12 according to the present embodiment include nine teeth 42 having three segments 55 in which adjacent three-phase windings 48 are arranged in the same order, and Two windings 48 are independently wound around the three teeth 42 and to which a voltage is individually applied, and two stators 21 are provided for each phase. and two insulation displacement terminals 57 that are connectable to connect the windings 48 of the three slots 49 (for example, the three U-phase windings 48U1, 48U2, and 48U3) in parallel. Therefore, the refrigeration cycle device 1, the compressor 2, and the electric motor 12 can be wound with the windings 48 with a simple structure, and it is possible to prevent quality deterioration due to work mistakes and work variations. High manufacturability.

The refrigeration cycle apparatus 1, the compressor 2, and the electric motor 12 according to the present embodiment also include terminal receiving portions 68 that collectively hold the two portions of the winding 48 and the pressure contact terminals 57. As shown in FIG. Therefore, the refrigerating cycle apparatus 1, the compressor 2, and the electric motor 12 can easily connect the independent windings 48 in parallel for each slot 49 with a simple structure. Being able to easily connect the independent windings 48 in parallel for each slot 49 makes it possible to prevent deterioration in quality due to work mistakes or variations in work, and is highly manufacturable.

Furthermore, the refrigeration cycle apparatus 1, the compressor 2, and the electric motor 12 according to this embodiment are provided with a terminal receiving portion 68 provided on the first insulating end plate 45A on one end surface side of the stator core 43. As shown in FIG. Therefore, the refrigerating cycle device 1, the compressor 2, and the electric motor 12 are connected to the sealed terminal portion 18 provided on the end plate 11b on the upper side of the sealed container 11 of the compressor 2, as in the case where the lead wire 23 is connected to the electric motor 12. The lead wires 23 can be easily concentrated and aggregated on one end face of the wire (lead wire 23) to easily set the route of the wiring (lead wire 23).

Note that the terminal receiving portions 68 may be provided separately on both end surfaces of the stator core 43 . For example, a first terminal receiving portion 69 for holding pressure contact terminals 57 connected to the first inverter circuit 61 is provided on the first insulating end plate 45A on one end face side of the stator core 43, and the second inverter circuit 62 A second terminal receiving portion 70 for holding the pressure contact terminal 57 to be connected may be provided on the second insulating end plate 45B on the other end face side of the stator core 43 . That is, the terminal receiving portion 68 can suitably set the lead-out direction of the lead wire 23 in the axial direction according to the application of the electric motor 12 .

Moreover, the refrigerating cycle apparatus 1, the compressor 2, and the electric motor 12 according to the present embodiment include the first section 55A including the teeth 42 at which the windings 48 are started, and the first section 55A including the teeth 42 at which the windings 48 are finished. The three sections 55C are arranged side by side. Therefore, the refrigerating cycle device 1, the compressor 2, and the electric motor 12 can be wired without crossing the windings 48, as shown in FIGS.

Therefore, according to the refrigerating cycle apparatus 1, the compressor 2, and the electric motor 12 according to the present embodiment, it is possible to have the concentrated winding stator 21 with nine slots 49 and to wind the windings 48 with a simple structure. Therefore, it is possible to prevent deterioration in quality due to work mistakes and work variations, and to improve manufacturability.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 1... Refrigeration cycle apparatus, 2... Compressor, 3... Radiator, 5... Expansion device, 6... Heat absorber, 7... Accumulator, 7a... Suction pipe, 8... Refrigerant pipe, 8a... Discharge pipe, 11... Closed container , 11a...Body 11b...End plate 11c...End plate 12...Open winding type motor 12...Electric motor 13...Compression mechanism 15...Rotating shaft 15a...Intermediate portion of rotating shaft 15b...Lower end of rotating shaft Part 16 Main bearing 17 Sub-bearing 18 Sealed terminal 21 Stator 22 Rotor 23 Lead wire 25 Rotor core 26 Eccentric part 31 Cylinder chamber 32... Cylinder 33... Roller 34... Fastening member 35... Discharge muffler 36... Fastening member 39... Lubricating oil 41... Yoke 41a... Outer peripheral surface of yoke 42... Teeth 42a... Teeth base 42b... Teeth tips 42c Teeth tip surface 43 Stator core 43a One end surface of stator core 43b Other end surface of stator core 43c Rotor accommodation space 45 Insulated end plate 45A... First insulating end plate 45B... Second insulating end plate 48... Winding 49... Slot 51... Outer wall member 51a... Outer peripheral surface of outer wall member 52... Inner wall member 52a... Inner circumference of inner wall member Surface 53... Connecting member 55... Section 55A... First section 55B... Second section 55C... Third section 57... IDC terminal 58... Terminal wire 59... Crossover wire 61... First inverter circuit , 62... second inverter circuit, 65... pressure contact protrusion, 66... pressure contact slot, 67... tab, 68... terminal receiving portion, 69... first terminal receiving portion, 70... second terminal receiving portion, 71... holding portion , 72... insertion part, 73r, 73l... groove of holding part, 75U1... first groove for U-phase first winding, 75U2... second groove for U-phase first winding, 76U1... for U-phase second winding First groove, 76U2... second groove for U-phase second winding, 77U... groove for U-phase third winding.

Claims (6)

a cylindrical stator;
a rotor disposed inside the stator,
The stator is
an iron core having a cylindrical yoke and nine teeth protruding inward from the yoke and arranged in a circumferential direction at intervals;
a plurality of insulating end plates provided on both axial end surfaces of the iron core;
a winding wound between the nine teeth and the insulating end plate;
The nine teeth have three sections in which the adjacent three-phase windings are arranged in the same order,
The windings are three independent windings that are continuously wound around three teeth independently for each phase,
Each of the independent windings has a winding start terminal wire, a portion wound around the first tooth, a crossover wire extending from the first tooth to the second tooth, a portion wound around the second tooth, and the second tooth. A connecting wire extending from one tooth to the third tooth, a portion wound around the third tooth, and a terminal wire at the end of winding,
Two stators are provided for each phase, and each of the stators has a terminal that electrically connects two points of the terminal wire of the winding and the crossover wire to connect the windings of the three slots in parallel. Open-wound motor with For each phase, a terminal provided on the outer periphery of the teeth at which the winding is started and at the outer periphery of the teeth at which the winding is finished to collectively hold the two positions of the winding and the terminals. 2. The open wound motor of claim 1, comprising a receiver. 3. The open-winding motor according to claim 2, wherein the terminal receiving portion is provided on the insulating end plate on one end face side of the iron core. 4. The section according to any one of claims 1 to 3, wherein the section containing the teeth for starting the winding and the section containing the teeth for finishing the winding are adjacent to each other in the circumferential direction of the stator. Open wound motor as described. a closed container;
a compression mechanism that is housed in the sealed container and capable of compressing a refrigerant introduced into the sealed container;
5. A compressor comprising: an open-winding motor according to any one of claims 1 to 4, which is housed in the closed container and drives the compression mechanism. a compressor according to claim 5;
a radiator;
an inflator;
a heat absorber;
A refrigeration cycle apparatus comprising: a refrigerant pipe that connects the compressor, the radiator, the expansion device, and the heat absorber and allows refrigerant to flow.

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