JP2022156948A - Motor compressor - Google Patents

Abstract

To simplify a configuration in a housing.SOLUTION: A first end 36b of a motor-side conductive pin 36 protrudes into an inverter accommodation chamber 14a from a bottom wall 13a. An external connector of a harness 85 includes a harness housing 86 attached to a housing and a harness-side conductive pin 87. A protruding end 87a of the harness-side conductive pin 87 protrudes from the harness housing 86 into the inverter accommodation chamber 14a. A connector 45 includes a plurality of conductive terminals 46, a plurality of bus bars 47 electrically connecting the plurality of conductive terminals 46 and a circuit substrate 41, and a holder 48 holding the plurality of conductive terminals 46 and the plurality of bus bars 47. The plurality of conductive terminals 46 includes a motor-side conductive terminal 46a, to which the first end 36b of the motor-side conductive pin 36 is inserted and electrically connected, and a harness-side conductive terminal 46b, to which a protrusion end 87a of the harness-side conductive pin 87 is inserted and electrically connected.SELECTED DRAWING: Figure 2

Description

The present invention relates to an electric compressor.

The electric compressor described in Patent Literature 1 includes a compressing portion that compresses fluid, an electric motor that drives the compressing portion, an inverter device that drives the electric motor, and a housing that accommodates the inverter device. A known inverter device includes a circuit board, a connector, and conductive pins. The connector includes conductive terminals, bus bars that electrically connect the conductive terminals and the circuit board, and holders that hold the conductive terminals and the bus bars. A first end of the conductive pin is electrically connected to the electric motor. A second end of the conductive pin, opposite the first end, is inserted into the conductive terminal. Thereby, the electric motor and the circuit board are electrically connected.

JP 2011-163231 A

Incidentally, in some cases, an inverter device and an external power supply are electrically connected via a harness for the purpose of improving the degree of freedom in layout of the electric compressor and the external power supply. In this case, it is necessary to provide terminals in the housing to connect with the terminals provided in the harness. Providing the terminals in the housing in this manner may complicate the structure in the housing.

An electric compressor for solving the above problems includes a compression section for compressing a fluid, an electric motor for driving the compression section, an inverter device for driving the electric motor, a motor housing chamber for housing the electric motor, and the a housing having a partition wall that partitions an inverter housing chamber that houses an inverter device; and a motor that has one end projecting from the dividing wall into the inverter housing chamber and the other end electrically connected to the electric motor. An electric compressor comprising: a harness having side conductive pins, an external connector connected to the housing, and an electric wire electrically connecting the external connector and an external power supply, wherein the external connector is connected to the housing and a harness-side conductive pin having one end protruding from the housing into the inverter housing chamber and having the other end electrically connected to the electric wire, wherein the inverter device includes a circuit board, an internal connector, the internal connector comprising: a plurality of conductive terminals; a plurality of bus bars electrically connecting the plurality of conductive terminals and the circuit board; and a plurality of the conductive terminals and the plurality of bus bars. and a holder for holding the plurality of conductive terminals, and the plurality of conductive terminals includes a motor-side conductive terminal into which one end of the motor-side conductive pin is inserted and electrically connected, and a motor-side conductive terminal into which one end of the harness-side conductive pin is inserted and electrically connected. and a harness-side conductive terminal that is directly connected.

According to the above configuration, the motor-side conductive terminal into which one end of the motor-side conductive pin is inserted and the harness-side conductive terminal into which one end of the harness-side conductive pin is inserted can be held by a common holder. Therefore, compared to the case where the motor-side conductive terminals and the harness-side conductive terminals are held by different holders, the structure inside the housing can be simplified.

In the electric compressor, the axial direction of the motor-side conductive pin and the axial direction of the harness-side conductive pin are preferably the same.
According to the above configuration, the motor-side conductive terminals and the harness-side conductive terminals are held by the holder in the same posture. Therefore, compared with the case where the motor-side conductive terminals and the harness-side conductive terminals are held in different postures by the holder, it is possible to suppress an increase in the size of the holder.

In the electric compressor, the inverter device may further include a filter component that reduces noise contained in the input current, and the holder may hold the filter component.
According to the above configuration, the holding of the motor-side conductive terminals and the harness-side conductive terminals and the holding of the filter component can be performed by a common holder. Therefore, the structure inside the housing can be simplified as compared with the case where different holders are used to hold the motor-side conductive terminals and the harness-side conductive terminals and to hold the filter component.

In the electric compressor, the inverter device may further include a switching element that performs a switching operation for driving the electric motor, and the holder may hold the switching element.

According to the above configuration, the holding of the motor-side conductive terminals and the harness-side conductive terminals and the holding of the switching element can be performed by a common holder. Therefore, the structure inside the housing can be simplified compared to the case where different holders are used to hold the motor-side conductive terminals and the harness-side conductive terminals and to hold the switching element.

According to this invention, the structure inside the housing can be simplified.

The side view which shows a part of electric compressor in a cross section. Sectional drawing which expands and shows an inverter housing periphery. FIG. 3 is an exploded perspective view showing the first housing and harness; FIG. 2 is a circuit diagram showing the electrical configuration of the electric compressor; Sectional drawing which shows a 1st holding|maintenance part and a 1st connector main body. Sectional drawing which shows a 2nd holding|maintenance part and a 2nd connector main body. The perspective view which shows a harness. Sectional drawing which shows harness. FIG. 4 is a schematic diagram showing how motor-side conductive pins and harness-side conductive pins are inserted into conductive terminals;

An embodiment embodying an electric compressor will be described below with reference to FIGS. 1 to 9. FIG. The electric compressor of this embodiment is used, for example, in a vehicle air conditioner. In the drawings, for convenience of explanation, X-, Y-, and Z-axes that are orthogonal to each other are shown.

[Overall Configuration of Electric Compressor]
As shown in FIG. 1 , the electric compressor 10 has a housing 11 . The housing 11 includes a bottomed cylindrical discharge housing 12 , a bottomed cylindrical motor housing 13 connected to the discharge housing 12 , and an inverter housing 14 connected to the motor housing 13 . Discharge housing 12, motor housing 13, and inverter housing 14 are made of metal material. The motor housing 13 has a bottom wall 13a and a cylindrical peripheral wall 13b extending from the outer peripheral edge of the bottom wall 13a. A rotating shaft 15 is accommodated in the motor housing 13 .

The electric compressor 10 includes a compression section 16 that compresses fluid, an electric motor 17 that drives the compression section 16 , and an inverter device 40 that drives the electric motor 17 . The compression portion 16 is housed inside the motor housing 13 . In the present embodiment, the fluid compressed by the compression section 16 is refrigerant. The refrigerant is compressed by driving the compression unit 16 . A specific configuration of the compression unit 16 is arbitrary. Examples of the compression section 16 include a scroll type, a piston type, and a vane type.

The electric motor 17 drives the compression section 16 by rotating the rotating shaft 15 . The electric motor 17 has a cylindrical stator 19 and a rotor 20 arranged inside the stator 19 . The rotor 20 rotates integrally with the rotating shaft 15 . The rotor 20 has a cylindrical rotor core 20a and a plurality of permanent magnets 20b provided on the rotor core 20a. The rotor core 20a is fixed to the rotary shaft 15. As shown in FIG. The plurality of permanent magnets 20b are positioned at regular intervals in the circumferential direction of the rotor core 20a.

The stator 19 has an annular stator core 19a and u-phase, v-phase, and w-phase coils 21 . The stator core 19a is fixed to the inner peripheral surface of the peripheral wall 13b. The coil 21 is wound around the stator core 19a. In this embodiment, the u-phase, v-phase, and w-phase coils 21 are Y-connected.

The electric motor 17 is housed inside the motor housing 13 . In other words, the housing 11 has a motor housing chamber 18 that houses the electric motor 17 . The electric motor 17 is positioned between the compression portion 16 and the bottom wall 13a in the axial direction along which the axis of the rotating shaft 15 extends. The axial direction is a direction parallel to the X-axis. This axial direction is referred to as an axial direction X below. A direction that is the axial direction X and is parallel to the X axis is also referred to as a first axial direction X1. A direction that is the axial direction X and is opposite to the first axial direction X1 is also referred to as a second axial direction X2.

A cluster block 29 is arranged in the motor housing chamber 18 . Three motor wires 21a are led out from each of the coils 21 so as to correspond to the u-phase, v-phase, and w-phase coils 21 . FIG. 1 shows only one of the three motor wirings 21a.

A suction port 13h is formed in the peripheral wall 13b. The suction port 13h communicates with the motor housing chamber 18 . The discharge housing 12 is formed with a discharge port 12h. One end of the external refrigerant circuit 22 is connected to the suction port 13h. The other end of the external refrigerant circuit 22 is connected to the discharge port 12h. The external refrigerant circuit 22 has an evaporator, a condenser, an expansion valve, and the like.

Refrigerant is sucked into the motor housing chamber 18 from the external refrigerant circuit 22 through the suction port 13h. The refrigerant is compressed by the compressor 16 in the motor housing chamber 18 . The refrigerant flows out from the motor housing chamber 18 to the external refrigerant circuit 22 through the discharge port 12h.

As shown in FIGS. 1 and 2, the inverter housing 14 is attached to the bottom wall 13a of the motor housing 13. As shown in FIG. The inverter device 40 is housed within the inverter housing 14 . In other words, the housing 11 has an inverter housing chamber 14 a that houses the inverter device 40 . In this embodiment, the compression unit 16, the electric motor 17, and the inverter device 40 are arranged side by side in the axial direction X in this order. The inverter housing 14 has a first housing 23 and a second housing 31 attached to the first housing 23 . A screw hole (not shown) and a through hole 13d are formed in the bottom wall 13a.

As shown in FIG. 3 , the first housing 23 has a cylindrical main body portion 24 extending in the axial direction X, a plurality of boss portions 25 and projection portions 27 . The direction in which the axis of the body portion 24 extends is the same as the axial direction X. As shown in FIG. The boss portion 25 is located on the inner peripheral surface of the body portion 24 .

The plurality of boss portions 25 are positioned at intervals in the circumferential direction of the main body portion 24 . There are four boss portions 25 in this embodiment. Only one of the four bosses 25 is shown in the drawing. When the motor housing 13 and the first housing 23 are viewed from the axial direction X, the boss portion 25 overlaps with the screw hole of the bottom wall 13a.

The protruding portion 27 protrudes from the outer peripheral surface of the body portion 24 . The projecting portion 27 has a quadrangular prism shape extending in the axial direction X. As shown in FIG. A connector mounting hole 27b and a harness mounting hole 27c are formed in the projecting portion 27 .

A low-voltage connector 28 is inserted into the connector mounting hole 27b. The low-voltage connector 28 is fixed to the projecting portion 27 while being inserted into the connector mounting hole 27b. A low-voltage power supply connector (not shown in FIG. 3) is connected to the low-voltage connector 28 . Thereby, the low-voltage power supply and the inverter device 40 are electrically connected. The low-voltage power supply is, for example, a low-voltage battery mounted on a vehicle. Examples of low-voltage batteries include lead-acid batteries.

As shown in FIGS. 2 and 3, the inverter device 40 is electrically connected to a high voltage power source (not shown in FIGS. 2 and 3) through the harness mounting hole 27c. The high voltage power supply is, for example, a high voltage battery mounted on a vehicle. The voltage of the high voltage battery is higher than the voltage of the low voltage battery. Examples of high-voltage batteries include lithium-ion secondary batteries and nickel-hydrogen secondary batteries. The high voltage power supply of this embodiment corresponds to the external power supply.

As shown in FIG. 2 , the second housing 31 has a flat lid portion 32 and a side wall portion 33 extending from the outer peripheral edge of the lid portion 32 . The lid portion 32 extends perpendicular to the axial direction X. As shown in FIG. The lid portion 32 is positioned to cover the first housing 23 when the first housing 23 and the second housing 31 are viewed from the first axial direction X1. A second housing bolt hole (not shown) is formed in the side wall portion 33 .

As shown in FIG. 3, a bolt (not shown) is inserted through the second housing bolt hole and the inside of the boss portion 25 of the first housing 23 from the first axial direction X1. The tip of the bolt is screwed into a threaded hole (not shown) in the bottom wall 13a. Thereby, the first housing 23 and the second housing 31 are attached to the motor housing 13 .

As shown in FIG. 1, the inverter housing chamber 14a is defined by the bottom wall 13a, the first housing 23, and the second housing 31. As shown in FIG. The bottom wall 13a functions as a partition wall that partitions the motor housing chamber 18 and the inverter housing chamber 14a. In other words, the housing 11 has a partition wall that partitions the motor housing chamber 18 and the inverter housing chamber 14a.

As shown in FIG. 2 , the electric compressor 10 has a conductive member 35 . The conductive member 35 includes three cylindrical motor-side conductive pins 36 and a support plate 37 that supports the motor-side conductive pins 36 . Only one of the three motor-side conductive pins 36 is shown in the drawing. The axial direction of the motor-side conductive pin 36 is the same as the axial direction X. As shown in FIG. The support plate 37 has a flat plate shape extending perpendicular to the axial direction X. As shown in FIG. The motor-side conductive pin 36 penetrates the support plate 37 in the axial direction X. As shown in FIG. An insulating member made of glass (not shown) is interposed between each of the motor-side conductive pins 36 and the support plate 37 .

Bolt holes (not shown) are formed at two locations on both ends of the support plate 37 . A bolt (not shown) inserted through the bolt hole is screwed into two screw holes (not shown) in the bottom wall 13a. Thereby, the conductive member 35 is fixed to the motor housing 13 .

The through hole 13d of the bottom wall 13a is blocked by the support plate 37 from the first axial direction X1. Each of the motor-side conductive pins 36 penetrates the bottom wall 13a by being inserted into the through hole 13d.

One end of the motor-side conductive pin 36 is called a first end 36b. The other end of the motor-side conductive pin 36 is called a second end 36a. The second end 36 a is positioned in the motor housing chamber 18 . The first end 36b protrudes into the inverter housing chamber 14a from the bottom wall 13a.

As shown in FIG. 1 , in the motor accommodation chamber 18 , the second ends 36 a of the three motor-side conductive pins 36 and the three motor wires 21 a are electrically connected to each other via the cluster block 29 . Thereby, the second end 36 a of each of the motor-side conductive pins 36 is electrically connected to the electric motor 17 .

[Structure of Inverter Device]
As shown in FIG. 4, the inverter device 40 includes a plurality of switching elements Qu1, Qu2, Qv1, Qv2, Qw1, Qw2. The switching elements Qu 1 , Qu 2 , Qv 1 , Qv 2 , Qw 1 and Qw 2 perform switching operations for driving the electric motor 17 . The switching elements Qu1, Qu2, Qv1, Qv2, Qw1, Qw2 are IGBTs (power switching elements). Diodes Du1, Du2, Dv1, Dv2, Dw1 and Dw2 are connected to the switching elements Qu1, Qu2, Qv1, Qv2, Qw1 and Qw2, respectively. The diodes Du1, Du2, Dv1, Dv2, Dw1 and Dw2 are connected in parallel with the switching elements Qu1, Qu2, Qv1, Qv2, Qw1 and Qw2.

Each switching element Qu1, Qv1, Qw1 constitutes an upper arm of each phase. Each switching element Qu2, Qv2, Qw2 constitutes a lower arm of each phase. The switching elements Qu1 and Qu2, the switching elements Qv1 and Qv2, and the switching elements Qw1 and Qw2 are connected in series. Gates of the respective switching elements Qu1, Qu2, Qv1, Qv2, Qw1, Qw2 are electrically connected to the control computer 101. FIG. In FIG. 4, the low voltage power supply is illustrated as low voltage power supply 91 . The control computer 101 operates by applying a voltage from the low voltage power supply 91 .

In FIG. 4, the high voltage power supply is illustrated as high voltage power supply 92 . The collectors of the respective switching elements Qu1, Qv1, Qw1 are electrically connected to the positive electrode of the high voltage power supply 92 via the first connection line EL1. The emitters of the respective switching elements Qu2, Qv2, Qw2 are electrically connected to the negative pole of the high voltage power supply 92 via the second connection line EL2. The u-phase coil 21 is called a u-phase coil 21u, the v-phase coil 21 is called a v-phase coil 21v, and the w-phase coil 21 is called a w-phase coil 21w. The emitters of the switching elements Qu1, Qv1, Qw1 and the collectors of the switching elements Qu2, Qv2, Qw2 are connected in series to the u-phase coil 21u, the v-phase coil 21v, and the w-phase coil 21w, respectively. properly connected.

The control computer 101 controls the driving voltage of the electric motor 17 by pulse width modulation. Specifically, the control computer 101 generates a PWM signal from a high-frequency triangular wave signal called a carrier wave signal and a voltage command signal for instructing voltage. The control computer 101 uses the generated PWM signal to control switching operations (on/off control) of the switching elements Qu1, Qu2, Qv1, Qv2, Qw1, and Qw2. As a result, the DC voltage from the high voltage power supply 92 is converted into AC voltage. The driving of the electric motor 17 is controlled by applying the converted AC voltage to the electric motor 17 as a driving voltage.

The control computer 101 variably controls the duty ratio of the switching operation of each switching element Qu1, Qu2, Qv1, Qv2, Qw1, Qw2 by controlling the PWM signal. Thereby, the rotation speed of the electric motor 17 is controlled. The control computer 101 is electrically connected to the air conditioning ECU 102, and when receiving information about the target rotation speed of the electric motor 17 from the air conditioning ECU 102, rotates the electric motor 17 at the target rotation speed.

Inverter device 40 includes filter component 81 that reduces noise contained in the input current. A filter component 81 of this embodiment includes a capacitor 82 and a common mode choke coil 83 .

A capacitor 82 is provided on the input side of each switching element Qu1, Qu2, Qv1, Qv2, Qw1, Qw2. Capacitor 82 is connected in parallel with high voltage power supply 92 . The capacitor 82 includes a first bypass capacitor 82a, a second bypass capacitor 82b, and a smoothing capacitor 82c. One end of the first bypass capacitor 82a is electrically connected to the first connection line EL1. The other end of the first bypass capacitor 82a is electrically connected to one end of the second bypass capacitor 82b. The other end of the second bypass capacitor 82b is electrically connected to the second connection line EL2. An intermediate point between the first bypass capacitor 82a and the second bypass capacitor 82b is grounded, for example, to the body of the vehicle. The first bypass capacitor 82a and the second bypass capacitor 82b are connected in series.

One end of the smoothing capacitor 82c is electrically connected to the first connection line EL1. The other end of the smoothing capacitor 82c is electrically connected to the second connection line EL2. The first bypass capacitor 82a, the second bypass capacitor 82b, and the smoothing capacitor 82c are connected in parallel.

The common mode choke coil 83 has a first winding 831 provided on the first connection line EL1 and a second winding 832 provided on the second connection line EL2. The common mode choke coil 83 has virtual normal mode coils L1 and L2 in addition to the first winding 831 and the second winding 832 . That is, the common mode choke coil 83 of this embodiment has a first winding 831, a second winding 832, and virtual normal mode coils L1 and L2 in terms of an equivalent circuit. The first winding 831 is connected in series with the virtual normal mode coil L1, and the second winding 832 is connected in series with the virtual normal mode coil L2.

A common mode choke coil 83, a first bypass capacitor 82a, a second bypass capacitor 82b, and a smoothing capacitor 82c reduce common mode noise. Common mode noise is noise in which currents flow in the same direction in the first connection line EL1 and the second connection line EL2. Common mode noise is generated when the electric compressor 10 and the high voltage power supply 92 are electrically connected via a path other than the first connection line EL1 and the second connection line EL2, such as the vehicle body. obtain.

The switching elements Qu1, Qu2, Qv1, Qv2, Qw1, Qw2 are modularized as an intelligent power module (not shown). The capacitor 82 has a rectangular block shape as a whole. A capacitor lead wire (not shown) protrudes from the capacitor 82 . A plurality of coil lead wires (not shown) are led out from the common mode choke coil 83 . A plurality of element lead wires (not shown) protrude from the intelligent power module.

As shown in FIG. 1 , the inverter device 40 has a circuit board 41 and a connector 45 . The circuit board 41 and the connector 45 are housed in the inverter housing chamber 14a. Connector 45 corresponds to an internal connector in the present invention.

[Structure of circuit board]
As shown in FIG. 2, the circuit board 41 is formed with a plurality of insertion holes 41a. A bolt B is inserted through each of the insertion holes 41a from the first axial direction X1. A plurality of through holes (not shown) are formed in the circuit board 41 in addition to the through hole 41a. FIG. 2 shows only one each of the plurality of insertion holes 41a and bolts B. As shown in FIG.

[Connector structure]
The connector 45 includes multiple connector bodies 70 and a holder 48 that holds the multiple connector bodies 70 . The connector body 70 includes a plurality of conductive terminals 46 and a plurality of bus bars 47 electrically connecting the plurality of conductive terminals 46 and the circuit board 41 . In other words, the connector 45 can be said to have a plurality of conductive terminals 46 and a plurality of busbars 47 . It can be said that the holder 48 holds a plurality of conductive terminals 46 and a plurality of bus bars 47 .

Below, among the plurality of connector bodies 70 , some connector bodies 70 are also called first connector bodies 71 , and the other connector bodies 70 are also called second connector bodies 72 . The connector main body 70 of this embodiment is composed of three first connector main bodies 71 and two second connector main bodies 72 .

[Structure of connector body]
As shown in FIGS. 5 and 6, the conductive terminal 46 has a rectangular tubular shape extending in the axial direction X. As shown in FIGS. The bus bar 47 has a flat plate shape extending in the axial direction X so as to stand. A connecting portion 50 connects between the conductive terminal 46 and the bus bar 47 . The conductive terminals 46, the busbars 47, and the connecting portions 50 are made of metal. The connecting portion 50 may be integrally formed with the conductive terminal 46 . The connecting portion 50 may be integrated with the busbar 47 by joining such as welding.

The plurality of conductive terminals 46 includes motor-side conductive terminals 46a and harness-side conductive terminals 46b. The conductive terminals 46 of this embodiment are composed of three motor-side conductive terminals 46a and two harness-side conductive terminals 46b. The first connector main body 71 includes motor-side conductive terminals 46a. The second connector main body 72 includes harness-side conductive terminals 46b.

As shown in FIG. 5, a direction parallel to the Y-axis is called a first direction Y. As shown in FIG. A direction parallel to the Z-axis is called a second direction Z. The busbar 47 extends in the direction opposite to the second direction Z when one first connector body 71 is viewed from the axial direction X. As shown in FIG. When the two first connector bodies 71 are viewed from the axial direction X, the bus bar 47 has a crank shape that extends in the direction opposite to the second direction Z while bending from the connecting portion 50 . Specifically, the busbars 47 in the two first connector bodies 71 extend in the direction opposite to the second direction Z, extend in the direction opposite to the first direction Y, and further extend in the direction opposite to the second direction Z. extending in the direction

The first connector body 71 has a first connector lead member 71b. The first connector lead member 71b extends from the end of the bus bar 47 in the direction opposite to the second direction Z toward the first axial direction X1.

As shown in FIG. 6 , when the two second connector bodies 72 are viewed from the axial direction X, the bus bar 47 has a crank shape extending in the second direction Z while bending from the connecting portion 50 . Specifically, the busbars 47 in the two second connector bodies 72 extend in the second direction Z, extend in the direction opposite to the first direction Y, and further extend in the second direction Z. As shown in FIG.

The second connector body 72 includes a second connector lead member 72b. The second connector lead member 72b extends from the end of the busbar 47 in the second direction Z toward the first axial direction X1.

[Holder structure]
As shown in FIG. 2, the holder 48 is made of resin. The holder 48 is housed in the inverter housing chamber 14a. The holder 48 has a holder boss portion 48a. The axial direction of the holder boss portion 48a is the same as the axial direction X. As shown in FIG. A bolt B, which is inserted through the insertion hole 41a of the circuit board 41, is inserted through the inside of the holder boss portion 48a. A tip of the bolt B is screwed into a threaded hole 23 a in the first housing 23 . Thereby, the holder 48 is attached to the inverter housing 14 together with the circuit board 41 . The holder 48 is positioned between the bottom wall 13 a and the circuit board 41 in the axial direction X. As shown in FIG.

As shown in FIGS. 5 and 6, the holder 48 has a holding portion 49 that holds a plurality of connector bodies 70. As shown in FIG. There are two holding portions 49 in this embodiment. One holding portion 49 is also called a first holding portion 51 , and the other holding portion 49 is also called a second holding portion 52 . Further, the holder 48 of the present embodiment includes a capacitor holding portion (not shown) that holds the capacitor 82, a coil holding portion (not shown) that holds the common mode choke coil 83, an element holding portion (not shown) that holds the intelligent power module, have In other words, it can be said that the holder 48 holds the filter component 81 . It can be said that the holder 48 holds the switching elements Qu1, Qu2, Qv1, Qv2, Qw1 and Qw2. Each holding portion is recessed in the holder 48 so as to match the outer shape of the object to be held.

[Structure of holding part]
A plurality of first pin insertion holes 51 a are formed in the first holding portion 51 . There are three first pin insertion holes 51a in this embodiment. A plurality of second pin insertion holes 52 a are formed in the second holding portion 52 . There are two second pin insertion holes 52a in this embodiment. Each of the first pin insertion hole 51a and the second pin insertion hole 52a opens to the end surface of the holder 48 in the second axial direction X2.

A plurality of terminal accommodating portions 53 and a plurality of bus bar accommodating portions 54 are formed inside each of the first holding portion 51 and the second holding portion 52 . The terminal accommodating portion 53 and the busbar accommodating portion 54 are spaces formed inside the first holding portion 51 and the second holding portion 52 . The terminal accommodating portion 53 and the busbar accommodating portion 54 communicate with each other. In each of the first holding portion 51 and the second holding portion 52, the plurality of terminal accommodating portions 53 are spaced apart from each other in the first direction Y. As shown in FIG. In each of the first holding portion 51 and the second holding portion 52 , the plurality of busbar housing portions 54 are positioned in the first direction Y at intervals.

As shown in FIG. 5, in the first holding portion 51, the terminal accommodating portion 53 communicates with the first pin insertion hole 51a. The first holding portion 51 has the terminal accommodating portions 53 and the bus bar accommodating portions 54 in numbers corresponding to the first pin insertion holes 51a. The first holding portion 51 of the present embodiment has three terminal housing portions 53 and three busbar housing portions 54 . In a cross-sectional view of the first holding portion 51 orthogonal to the axial direction X, one busbar accommodating portion 54 extends in the direction opposite to the second direction Z. As shown in FIG. In a cross-sectional view of the first holding portion 51 perpendicular to the axial direction X, the two busbar accommodating portions 54 are crank-shaped and extend in the direction opposite to the second direction Z while bending from the terminal accommodating portion 53 . A first lead member insertion hole 51b is formed at an end portion of each of the busbar accommodating portions 54 in the direction opposite to the second direction Z. As shown in FIG. The first lead member insertion hole 51b opens at the end surface of the holder 48 in the first axial direction X1.

The first holding portion 51 holds the first connector main body 71 . The terminal accommodating portion 53 of the first holding portion 51 accommodates the motor-side conductive terminal 46a. The bus bar 47 of the first connector body 71 is accommodated in the bus bar accommodating portion 54 of the first holding portion 51 . The connecting portion 50 of the first connector main body 71 is housed across the terminal housing portion 53 and the busbar housing portion 54 of the first holding portion 51 .

A first connector lead member 71b is inserted through the first lead member insertion hole 51b. The tip of the inserted first connector lead member 71b protrudes outside the first holding portion 51 from the opening of the first lead member insertion hole 51b in the first axial direction X1. The tip of the first connector lead member 71 b is inserted through a through hole (not shown) in the circuit board 41 . The first connector lead member 71b is electrically connected to the circuit board 41 by soldering or the like. Thereby, the first connector body 71 is electrically connected to the circuit board 41 .

As shown in FIGS. 2 and 5, the first end 36b of the motor-side conductive pin 36 is inserted into the motor-side conductive terminal 46a from the second axial direction X2 through the first pin insertion hole 51a. The outer peripheral surface of the motor-side conductive pin 36 contacts the motor-side conductive terminal 46a. That is, the first ends 36b of the motor-side conductive pins 36 are inserted into and electrically connected to the motor-side conductive terminals 46a. As a result, the electric motor 17 and the circuit board 41 are electrically connected via the motor-side conductive pins 36 and the first connector body 71 . The motor-side conductive terminals 46 a electrically connect the electric motor 17 and the circuit board 41 by inserting the first ends 36 b of the motor-side conductive pins 36 .

As shown in FIG. 6, in the second holding portion 52, the terminal accommodating portion 53 communicates with the second pin insertion hole 52a. The second holding portion 52 has the terminal accommodating portions 53 and the bus bar accommodating portions 54 in numbers corresponding to the second pin insertion holes 52a. The second holding portion 52 of the present embodiment has two terminal accommodating portions 53 and two bus bar accommodating portions 54 . In a cross-sectional view of the second holding portion 52 orthogonal to the axial direction X, the two busbar accommodating portions 54 are crank-shaped extending in the second direction Z while bending from the terminal accommodating portion 53 . A second lead member insertion hole 52b is formed at an end portion in the second direction Z of each of the busbar accommodating portions 54 . The second lead member insertion hole 52b opens at the end surface of the holder 48 in the first axial direction X1.

The second holding portion 52 holds the second connector main body 72 . The harness-side conductive terminal 46 b is accommodated in the terminal accommodating portion 53 of the second holding portion 52 . The bus bar 47 of the second connector body 72 is accommodated in the bus bar accommodating portion 54 of the second holding portion 52 . The connecting portion 50 of the second connector main body 72 is accommodated across the terminal accommodating portion 53 and the busbar accommodating portion 54 of the second holding portion 52 .

A second connector lead member 72b is inserted through the second lead member insertion hole 52b. The tip of the inserted second connector lead member 72b protrudes outside the second holding portion 52 from the opening of the second lead member insertion hole 52b in the first axial direction X1. The tip of the second connector lead member 72 b is inserted through a through hole (not shown) in the circuit board 41 . The second connector lead member 72b is electrically connected to the circuit board 41 by soldering or the like. Thereby, the second connector body 72 is electrically connected to the circuit board 41 .

[Mounting of various components on the circuit board]
As shown in FIG. 2, the capacitor lead wires, the coil lead wires, and the element lead wires are each electrically connected to the circuit board 41 by soldering or the like. Thereby, the capacitor 82 is mounted on the circuit board 41 through the capacitor lead wire. The common mode choke coil 83 is mounted on the circuit board 41 via coil lead wires. The intelligent power module is mounted on the circuit board 41 via element lead wires.

[Harness structure]
As shown in FIG. 3, the electric compressor 10 includes a harness 85 for electrically connecting the inverter device 40 to a high voltage power source as an external power source. Harness 85 has an external connector 85 a connected to housing 11 . The external connector 85 a includes a harness housing 86 and harness-side conductive pins 87 . The harness-side conductive pin 87 is cylindrical. The axial direction of the harness-side conductive pin 87 is the same as the axial direction X. As shown in FIG. The external connector 85 a of this embodiment has two harness-side conductive pins 87 .

The harness housing 86 is inserted into the harness mounting hole 27c of the first housing 23 from the second axial direction X2. The harness housing 86 is attached to the first housing 23 by bolting or the like. In other words, it can be said that the harness housing 86 is attached to the housing 11 . The harness housing 86 corresponds to the housing in the present invention, and the harness housing 86 and harness-side conductive pins 87 form part of the external connector 85a in the present invention.

As shown in FIGS. 7 and 8, the harness 85 has electric wires 88 electrically connecting the external connector 85a and the high voltage power supply. The harness 85 of this embodiment has two electric wires 88 . The electric wire 88 is composed of a core wire 88b made of a conductor and an insulating coating 88c covering the outer periphery of the core wire 88b. One end of the wire 88 is electrically connected to a high voltage power supply. The other end of the electric wire 88 is an exposed end 88a where the core wire 88b is exposed by removing the insulating coating 88c.

One end of the harness-side conductive pin 87 is called a projecting end 87a. The other end of the harness-side conductive pin 87 is called a connection end 87b. The harness 85 has a housing portion 89 , a first elastic member 93 that covers the wires 88 , a support member 95 that supports the wires 88 , and a metal plate 94 . The housing portion 89 is made of resin. A space is defined inside the accommodating portion 89 . The exposed end 88a of the electric wire 88 and the connection end 87b of the harness-side conductive pin 87 are accommodated in the space of the accommodating portion 89 . The connection end 87b is electrically connected to the exposed end 88a of the electric wire 88 by welding such as ultrasonic welding.

A grommet, for example, can be used as the first elastic member 93 . As the metal plate 94, for example, a plate material made of aluminum can be used. The metal plate 94 is positioned between the support member 95 and the first elastic member 93 in the axial direction X. As shown in FIG. The support member 95 is made of resin. A second annular elastic member 96 is interposed between the support member 95 and the harness housing 86 .

As shown in FIGS. 6 and 9, the protruding end 87a of the harness-side conductive pin 87 protrudes from the harness housing 86 into the inverter accommodating chamber 14a. A projecting end 87a of the harness-side conductive pin 87 is inserted into the harness-side conductive terminal 46b from the second axial direction X2 through the second pin insertion hole 52a. The outer peripheral surface of the harness-side conductive pin 87 contacts the harness-side conductive terminal 46b. That is, the projecting end 87a of the harness-side conductive pin 87 is inserted into and electrically connected to the harness-side conductive terminal 46b. Thereby, the high-voltage power supply and the circuit board 41 are electrically connected via the harness-side conductive pins 87 and the second connector body 72 . The harness-side conductive terminal 46 b electrically connects the circuit board 41 to the high-voltage power supply as an external power supply by inserting the projecting end 87 a of the harness-side conductive pin 87 .

[Action]
The action of this embodiment will be described.
As shown in FIG. 9, in order to secure the contact area of the motor-side conductive terminal 46a with the outer peripheral surface of the motor-side conductive pin 36, the motor-side conductive terminal 46a has a three-dimensional shape extending in the axial direction of the motor-side conductive pin 36. ing. In order to secure a contact area of the harness side conductive terminal 46 b with the outer peripheral surface of the harness side conductive pin 87 , the harness side conductive terminal 46 b has a three-dimensional shape extending in the axial direction of the harness side conductive pin 87 .

The holder 48 holds both the motor-side conductive terminals 46a and the harness-side conductive terminals 46b. Therefore, it is necessary for the holder 48 to secure an internal dimension of the motor-side conductive pin 36 in the axial direction in the terminal accommodating portion 53 that accommodates the motor-side conductive terminal 46a. The holder 48 needs to secure an internal dimension in the axial direction of the harness-side conductive pin 87 in the terminal accommodating portion 53 that accommodates the harness-side conductive terminal 46b.

In this embodiment, the motor-side conductive pin 36 and the harness-side conductive pin 87 extend in the axial direction X. As shown in FIG. Therefore, the axial direction of the motor-side conductive pin 36 and the axial direction of the harness-side conductive pin 87 are the same. It is sufficient to secure internal dimensions in the same direction for the terminal accommodating portion 53 that accommodates the motor-side conductive terminal 46a and the terminal accommodating portion 53 that accommodates the harness-side conductive terminal 46b. The holder 48 can hold the motor-side conductive terminals 46a and the harness-side conductive terminals 46b in an upright posture in the axial direction X. As shown in FIG.

[effect]
According to the above embodiment, the following effects can be obtained.
(1) A common holder 48 can hold the motor-side conductive terminals 46a into which the motor-side conductive pins 36 are inserted and the harness-side conductive terminals 46b into which the harness-side conductive pins 87 are inserted. Therefore, the structure inside the housing 11 can be simplified as compared with the case where the motor-side conductive terminals 46 a and the harness-side conductive terminals 46 b are held by different holders 48 .

(2) The axial direction of the motor-side conductive pin 36 and the axial direction of the harness-side conductive pin 87 are the same. Therefore, the motor-side conductive terminals 46a and the harness-side conductive terminals 46b are held by the holder 48 in the same posture. Therefore, compared to the case where the motor-side conductive terminal 46a and the harness-side conductive terminal 46b are held by the holder 48 in different orientations, the holder 48 can be prevented from increasing in size.

(3) The common holder 48 can hold the motor-side conductive terminals 46 a and the harness-side conductive terminals 46 b and the filter component 81 . Therefore, the structure inside the housing 11 can be simplified as compared with the case where the holding of the motor-side conductive terminals 46a and the harness-side conductive terminals 46b and the holding of the filter component 81 are performed by different holders 48 from each other.

(4) A common holder 48 can hold the motor-side conductive terminals 46a and the harness-side conductive terminals 46b and the switching elements Qu1, Qu2, Qv1, Qv2, Qw1, and Qw2. Therefore, compared to the case where different holders 48 are used to hold the motor-side conductive terminals 46a and the harness-side conductive terminals 46b and to hold the switching elements Qu1, Qu2, Qv1, Qv2, Qw1, and Qw2, structure can be simplified.

It should be noted that the above embodiment can be implemented with the following modifications. The above embodiments and the following modifications can be combined with each other within a technically consistent range.

O The holder 48 may hold only one of the capacitor 82 and the common mode choke coil 83, or may not hold both of them.
o The holder 48 does not have to hold the intelligent power module.

O The axial direction of the motor-side conductive pin 36 and the axial direction of the harness-side conductive pin 87 may be different directions. In this case, the motor-side conductive terminals 46a and the harness-side conductive terminals 46b have three-dimensional shapes extending in mutually different directions. The motor-side conductive terminals 46a and the harness-side conductive terminals 46b are held by a holder 48 so as to stand in different directions.

O At least one of the motor-side conductive pin 36 and the harness-side conductive pin 87 may have a columnar shape other than a circular column, such as a square column.
O Some or all of the busbars 47 in the connector body 70 may have the same crank shape. All of the busbars 47 in the connector main body 70 may have a shape that does not bend. In this case, the shape of the busbar accommodating portion 54 is appropriately changed according to the shape of the busbar 47 .

(circle) the inverter housing 14 may be comprised from one member in which the inverter accommodating chamber 14a is located.
(circle) the partition wall which divides the motor accommodation room 18 and the inverter accommodation room 14a may be a separate member from the motor housing 13. As shown in FIG. The partition wall in this case is attached to at least one of the motor housing 13 and the inverter housing 14 to partition the motor housing chamber 18 and the inverter housing chamber 14a. A through hole 13d through which the motor-side conductive pin 36 is inserted is formed in the partition wall in this case. In addition to the bottom wall 13 a of the motor housing 13 , the electric compressor 10 may be provided with a partition wall separate from the motor housing 13 .

O In the electric compressor 10, for example, the inverter device 40 may be positioned outside the motor housing 13 in the first direction Y, or may be positioned outside the motor housing 13 in the second direction Z, for example. In short, the compression unit 16, the electric motor 17, and the inverter device 40 do not have to be arranged side by side in the axial direction of the rotating shaft 15 in this order.

O The electric compressor 10 is not limited to being used in a vehicle air conditioner. For example, the electric compressor 10 may be mounted on a fuel cell vehicle and compress air as a fluid to be supplied to the fuel cell by the compression section 16 .

Qu1, Qu2, Qv1, Qv2, Qw1, Qw2...switching element 10...electric compressor 11...housing 13a...bottom wall 14a...inverter housing chamber 16...compressor 17...electric motor 18...motor accommodation Chamber 36 Motor-side conductive pin 36a Second end 36b First end 40 Inverter device 41 Circuit board 45 Connector 46 Conductive terminal 46a Motor-side conductive terminal 46b Harness Side conductive terminal 47 Bus bar 48 Holder 81 Filter part 85 Harness 85a External connector 86 Harness housing 87 Harness side conductive pin 87a Protruding end 87b Connecting end 88 Electric wire, 92...High voltage power supply.

Claims (4)

a compression section for compressing a fluid;
an electric motor that drives the compression unit;
an inverter device that drives the electric motor;
a housing having a partition wall that partitions a motor housing chamber that houses the electric motor and an inverter housing chamber that houses the inverter device;
a motor-side conductive pin having one end protruding from the partition wall into the inverter housing chamber and having the other end electrically connected to the electric motor;
An electric compressor comprising: an external connector connected to the housing; and a harness having an electric wire electrically connecting the external connector and an external power supply,
The external connector includes a housing attached to the housing, and a harness-side conductive pin having one end protruding from the housing into the inverter housing chamber and having the other end electrically connected to the electric wire,
The inverter device includes a circuit board and an internal connector,
The internal connector includes a plurality of conductive terminals, a plurality of bus bars electrically connecting the plurality of conductive terminals and the circuit board, and a holder holding the plurality of conductive terminals and the plurality of bus bars. ,
The plurality of conductive terminals includes a motor-side conductive terminal into which one end of the motor-side conductive pin is inserted and electrically connected, and a harness-side conductive terminal into which one end of the harness-side conductive pin is inserted and electrically connected. An electric compressor, comprising: a terminal; The electric compressor according to claim 1, wherein the axial direction of the motor-side conductive pin and the axial direction of the harness-side conductive pin are the same. The inverter device further includes a filter component that reduces noise contained in the input current,
The electric compressor according to claim 1 or 2, wherein the holder holds the filter component. The inverter device further includes a switching element that performs a switching operation for driving the electric motor,
The electric compressor according to any one of claims 1 to 3, wherein the holder holds the switching element.

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