DE102020214111A1 - ELECTRIC LATHE - Google Patents

Abstract

There is provided a rotary electric machine which can increase its coolability while suppressing assembly of a power module and a heat radiation member from increasing their outer diameter. In a rotary electric machine 100, two power modules 160a, 160b are arranged in such a manner that the respective heat radiation member fixing surfaces 16 thereof face each other in a circumferential direction X; in a circumferential direction space between the two power modules 160a, 160b, one or more power unit heat radiation members 110a, 110b are arranged, and a heat radiation member flow path 180 for a coolant is formed; a power fixing member 113 is disposed between a bracket 2 and a part constructed by the two power modules 160a, 160b and the one or more power unit heat radiation members 110a and 110b in an axial direction Z; a fixing member flow path 182 for the coolant is formed in an axial space between the power fixing member 113 and the one or more power unit heat radiating members 110a, 110b.

Description

BACKGROUND

The present disclosure relates to a rotary electric machine.

A rotary electric machine has a rotary electric machine main body that includes a rotor and a stator, and a power supply unit that includes an inverter and a control circuit and supplies electric power to the rotary electric machine main body. Because of space-saving efficiency, ease of assembly, shortening of a wire harness for connecting a rotary electric machine main body to an inverter, and the like, an electromechanical type electric rotary machine in which the rotary electric machine main body and the power supply unit are integrated with each other has been developed.

For example, in one is in both JP 2016-537959 A as well as JP 2017-112807 A disclosed electric lathe, an inverter or converter is mounted on an end region of the electric lathe. Ribs are formed in a heat radiation member of the inverter; Cooling air generated by an air blower fan mounted on one end portion of the rotor passes through the fins so that the inverter is cooled.

However, in the in JP 2016-537959 A disclosed technology, the heat radiation member of a power module and its fins in the circumferential direction and in the radial direction, and the fins protrude in the axial direction. Accordingly, since the power module, the heat radiation member, and the fins are arranged in such a manner as to extend in the circumferential direction, the circumferential direction arrangement area is large. Thus, there has been a problem that when two or more power modules are mounted, the outer diameter of the power supply unit becomes large.

In the in JP 2017-112807 A disclosed technology, the heat radiation component of a power module and its fins extend in the circumferential direction and in the radial direction, and the fins protrude to the radially inner side. Accordingly, since the power module, the heat radiation member, and the fins are arranged in such a manner as to extend in the circumferential direction, the circumferential direction arrangement area is large. Thus, there has been a problem that when two or more power modules are mounted, the outer diameter of the power supply unit becomes large.

In addition, it is in the in JP 2017-112807 A disclosed technology is required to make cooling air flow in the axial direction near the axis of rotation; therefore, in order to increase the cooling efficiency, it is necessary to provide an opening area in an axis direction end area of the power supply unit; as a result, the arrangement of components such as a control unit and the like is restricted.

For example, in the case where an electric lathe is mounted in the engine room of an automobile, the electric lathe is required to be able to be installed in a limited space. In the case where the outer diameter of the rotary electric machine is restricted, it is necessary to suppress assembly of the power module and the heat radiation member from increasing the outer diameter of the rotary electric machine.

Thus, a rotary electric machine which can increase its coolability while restricting the assembly of the power module and the heat radiation member from increasing the outer diameter thereof is desired.

Includes a rotary electric machine in accordance with the present disclosure
a stator provided with windings of two or more phases,
a rotor which is arranged in a radial inner side of the stator,
an axis of rotation that rotates integrally with the rotor,
a bracket that contains the stator and the rotor and pivotally holds the axis of rotation,
two or more power modules, all of which are provided with a power semiconductor device for energizing and de-energizing the windings,
a power unit heat radiation member that is a heat radiation member thermally connected to a heat radiation member fixing surface of the power module,
a control unit that controls the power semiconductor device, and
a power fixing member for fixing the power module to the bracket; on an axis direction side of the rotation axis rather than the bracket, the two power modules are arranged in such a manner that their respective heat radiation member fixing surfaces face each other in a circumferential direction; the heat radiation member fixing surface extends in the radial direction and in the axial direction; one or more power unit heat radiation members are arranged in a circumferential space between the two power modules, and a Heat radiation member flow path that is a flow path through which the coolant flows in the radial direction is formed; the power fixing member is disposed between the bracket and a part composed of the two power modules and the one or more power unit heat radiating members in the axial direction; a fixing member flow path that is a flow path through which a coolant flows in the radial direction is formed in an axis direction space between the power fixing member and the one or more power unit heat radiating members.

In the rotary electric machine according to the present disclosure, the heat radiation member fixing surface extends in the radial direction and in the axial direction; the power unit heat radiation member is arranged on one circumferential direction side or on the other circumferential direction side of the heat radiation member fixing surface. Accordingly, it becomes possible to suppress the extension of the power module and the power unit heat radiating member in the circumferential direction and suppress the enlargement of the respective arrangement areas of the power module and the power unit heat radiating member in the circumferential direction. In addition, it is possible that the heat radiation component flow path through which a coolant flows is made common to the two power modules and integrated therewith. In addition, since the two power modules can be arranged in such a manner that they are close to each other in the circumferential direction, the respective arrangement areas of the power module and the power unit heat radiating member in the circumferential direction can be reduced and therefore the enlargement of the outer diameter of the electric lathe can be suppressed .

In addition, by using a power fixing member to fix the power module to the bracket, a coolant flow path is also provided on the other axis direction side of each of the two power unit heat radiating members, and hence the cooling performance of the power unit heat radiating member is increased. In addition, since the power fixing member can be cooled using the coolant introduced for cooling the power unit heat radiating member, the thermal reliability of the power fixing member can be increased. Still further, since the fixing member flow path is provided on the front side of each of the two power unit heat radiating members, it becomes possible to suppress the increase in the respective arrangement surfaces of the power module and the power unit heat radiating member in the circumferential direction. As a result, the coolability of the rotary electric machine can be increased while suppressing the increase in the outer diameter of the rotary electric machine.

Figure list

• 1 is a perspective view of a rotary electric machine according to Embodiment 1;
• 2 Fig. 13 is a cross-sectional view of the rotary electric machine according to Embodiment 1 along a plane passing through the central axis of the rotation axis;
• 3rd Fig. 13 is a perspective view of a single power module and a control circuit heat radiating member according to Embodiment 1;
• 4th Fig. 13 is a circuit diagram of power semiconductor devices included in a single power module according to Embodiment 1;
• 5 is a cross-sectional view of main parts such as two power modules, two control circuitry Heat radiation members and the like according to Embodiment 1;
• 6th Fig. 13 is a cross-sectional view of main parts such as two power modules, two control circuit heat radiating members, and the like according to Embodiment 2;
• 7th FIG. 13 is a cross-sectional view of main parts such as two power modules, two control circuit heat radiating members and the like according to claim 3. FIG.
• 8th FIG. 13 is a cross-sectional view of main parts such as two power modules, two control circuit heat radiating members, and the like according to Embodiment 4. FIG.
• 9 FIG. 13 is a cross-sectional view of main parts such as the two power modules, the two control circuit heat radiating members, and the like according to Embodiment 4. FIG.
• 10 FIG. 13 is a cross-sectional view of main parts such as two power modules, two control circuit heat radiating members, and the like according to Embodiment 5. FIG.
• 11 FIG. 13 is a cross-sectional view of main parts such as the two power modules, the two control circuit heat radiating members, and the like according to Embodiment 5. FIG.
• 12th FIG. 13 is a cross-sectional view of main parts such as two power modules, two control circuit heat radiating members, and the like according to Embodiment 6. FIG.
• 13th FIG. 13 is a cross-sectional view of main parts such as the two power modules, the two control circuit heat radiating members, and the like according to Embodiment 6. FIG.
• 14th FIG. 13 is a cross-sectional view of main parts such as two power modules, two control circuit heat radiating members, and the like according to Embodiment 6. FIG.
• 15th FIG. 13 is a cross-sectional view of main parts such as the two power modules, the two control circuit heat radiating members, and the like according to Embodiment 7. FIG.
• 16 FIG. 13 is a cross-sectional view of main parts such as two power modules, two control circuit heat radiating members, and the like according to Embodiment 7. FIG.
• 17th FIG. 13 is a cross-sectional view of main parts such as the two power modules, the two control circuit heat radiating members, and the like according to Embodiment 7. FIG.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In the following, preferred embodiments of a rotary electric machine according to the present disclosure will be explained using the drawings. The explanation will be given with reference to the drawings, in which the same or similar constituent elements are denoted by the same reference numerals, respectively. In the views in the drawings, the respective sizes and scales of corresponding component areas are independent of one another.

Embodiment 1

An electric lathe 100 according to Embodiment 1 will be described with reference to the drawings. 1 Fig. 3 is a perspective view of the rotary electric machine 100 . 2 Fig. 13 is a schematic cross-sectional view of the rotary electric machine 100 along a plane containing a power unit heat radiating member 110 and the central axis of an axis of rotation 4th happens. 3rd Figure 3 is a perspective view of a single power module 160 and a power unit heat radiation member 110 . 4th Figure 13 is a circuit diagram of power semiconductor devices included in a single power module 160 are provided; 5 Fig. 13 is a cross-sectional view of main parts such as two power modules 150a and 160b and two power unit heat radiating members 110a and 110b , along a plane at right angles to the radial direction Y at its central areas.

In the present disclosure, the direction is parallel to the center axis C of the rotation axis 4th defined as an axial direction Z; an axial direction side Z2 is referred to as a rear side Z2; the other axial direction side Z1, which is the opposite side of the one axial direction side Z2, is referred to as a front side Z1; the radial direction Y and the circumferential direction X are the radial direction and the circumferential direction with respect to the center axis C of the axis of rotation 4th . A circumferential direction side X1 is referred to as a circumferential direction first side X1; the other circumferential direction side X2, which is the opposite side of the one circumferential direction side X1, is referred to as a circumferential direction second side X2. The “first page” used below corresponds to “a page” in claims of the present disclosure; the “second side” corresponds to “the other side” in claims of the present disclosure.

<Electric lathe main body 200>

The electric lathe 100 is with an electric lathe main body 200 Mistake. The electric lathe main body 200 has a stator 3rd provided with windings of two or more phases, a rotor 6th on the radial inside Y1 of the stator 3rd is arranged, an axis of rotation 4th that are integral with the rotor 6th rotates, and a bracket that holds the stator 3rd and the rotor 6th contains and the axis of rotation 4th pivotally supported, on.

In the present embodiment, the bracket includes a front bracket 1 on the front Z1 and a retainer 2 on the back Z2. The front bracket 1 has a cylindrical tubular outer peripheral wall and a disk-shaped side wall extending from the end portion of the outer peripheral wall of the front side Z1 to the radially inner side Y1; A through hole is provided in the central area of the side wall, facing away from the rotation axis 4th is penetrated and in which a camp 71 is fixed. The restraint 2 has a cylindrical tubular outer peripheral wall and a disc-shaped side wall extending from an end portion of the outer peripheral wall on the rear side Z2 extends to the radially inner side Y1; A through hole is provided in the central area of the side wall, which through the axis of rotation 4th is penetrated and in which a rear bearing 72 is fixed. Bolts extending in the axial direction Z. 15th couple the front bracket 1 with the restraint 2 .

The end of the axis of rotation 4th on the front side Z1 penetrates the through hole in the front bracket 1 and protrudes from the front bracket 1 to the front Z1; a pulley 9 is fixed to the protrusion area. A belt is around the pulley 9 and a pulley fixed to the crankshaft of an engine (not illustrated) is wound; Rotational driving force is between the electric lathe 100 and transferred to the engine.

The end of the axis of rotation 4th the through hole of the retainer penetrates on the rear side Z2 2 and protrudes from the retainer 2 to the rear Z2 in front; a pair of slip rings 90 is provided in the protrusion area. The pair of slip rings 90 is with a magnetic field winding 62 of the rotor 6th connected.

The rotor 6th is with the magnetic field winding 62 and a magnetic field iron core 61 Mistake. The rotor 6th is of the Lyndell type (also known as the claw pole type). The magnetic field iron core 61 has a cylindrical tubular central area, a front side hook area which extends from the end area of the central area on the front side Z1 to the radially outer side Y2 of the central area, and a rear side hook area which extends from the end area of the central area on the rear side Z2 to the radially outer side Y2 of the central area extends, on. An insulated copper wire of the magnetic field winding 62 is concentric on the outer peripheral surface of the central portion of the magnetic field iron core 61 wound up. The front side hook portion and the rear side hook portion are provided alternately in the circumferential direction X and become magnetic poles different from each other. For example, six or eight pieces of each of the front side hook areas and rear side hook areas are provided.

The stator 3rd is arranged in such a way that it drives the rotor 6th surrounds over a tiny gap and is fitted with a cylindrical tubular stator iron core 31 provided with a slot and windings 32 of two or more phases surrounding the slot in the stator iron core 31 are wound, provided. The windings 32 of two or more phases are, for example, a set of windings of three phases, two sets of windings of three phases, or a set of windings of five phases, and are set according to the kind of the electric lathe.

The windings 32 of two or more phases have a front side coil end region that of the stator iron core 31 protrudes to the front side Z1, and a rear side coil end region that extends from the stator iron core 31 protrudes to the rear of Z2. The connecting wires of the two or more phases penetrate the retainer 2 and extend to the rear Z2 (not illustrated).

The front bracket 1 and the retention 2 are provided spaced from each other in the Z-axis direction. The stator iron core 31 is from both axis direction ends through an opening end portion of the front bracket 1 on the rear side Z2 and an opening end portion of the retainer 2 pinched on the front side Z1.

A front air blower fan 81 , which has two or more blades, is at the end of the stator 3rd (Magnetic field iron core 61 ) fixed on the front side Z1; a rear air blower fan 82 with two or more blades is at the end of the stator 3rd (Magnetic field iron core 61 ) fixed to the rear Z2; the front air blower fan 81 and the rear air blower fan 82 rotate integrally with the rotor 6th . Each of the front air blower fan 81 and the rear air blower fan 82 blows air to the radially outer side Y2 so as to cool the front side coil end portion, the rear side coil end portion and the like disposed on the radially outer side Y2.

In the front bracket 1 are two or more opening areas 12th (hereinafter referred to as outlet opening areas 12th designated) in the area thereof on the radial outside Y2 of the front-side air blower fan 81 provided in such a manner that they are distributed in the circumferential direction; two or more opening areas 11 (hereinafter referred to as suction opening areas 11 designated) are provided in the area thereof on the front side Z1 in such a way that they are distributed in the circumferential direction. Air (cooling air) is drawn in from the outside through the suction opening areas 11 sucked in, to the radial outside Y2 by the front air blower fan 81 and are then sent via the exhaust port area 12th submitted.

In the restraint 2 are two or more opening areas 22nd (hereinafter referred to as outlet opening areas 22nd designated) in their area on the radial outside Y2 of the rear air blower fan 82 provided in such a manner that they are distributed in the circumferential direction; are two or more opening areas 21 (hereinafter referred to as suction opening areas 21 designated) in their area on the rear side Z2 in such a way that they are distributed in the circumferential direction. Air (cooling air) becomes from that mentioned below Power supply unit 300 through the suction port areas 21 sucked in, to the radial outside Y2 by the rear air blower fan 82 and are then sent via the exhaust port area 22nd submitted.

<Power supply unit 300>

The electric lathe 100 is with the power supply unit 300 for supplying the electric lathe main body 200 provided with electricity. The power supply unit 300 is on the rear side Z2 of the electric lathe main body 200 arranged and attached to the electric lathe main body 200 fixed. The power supply unit 300 comprises two or more power semiconductor devices and is provided with an inverter for performing DC / AC conversion between a DC power source and the windings of two or more phases and a control circuit 170 for controlling the power semiconductor devices. In the present embodiment, the inverter is from the power module 160 which is provided with the power semiconductor devices. The power supply unit 300 is with the power unit heat radiation member 110 provided with a heat radiation member fixing surface 16 of the power module 160 is fixed.

The power supply unit 300 is provided with a pair of brushes (not illustrated) which make contact with a pair of slip rings 90 make that in the projection area of the axis of rotation 4th are provided from the restraint 2 protruding to the rear side Z2, and a magnetic field winding power semiconductor device (not illustrated) for turning on / off electric power supplied through the brushes and the slip rings 90 the magnetic field winding 62 is to be supplied. The magnetic field winding power semiconductor device (switching device) is controlled by a control circuit 170 On / off controlled. A rotation sensor 92 for detecting rotation information on the rotation axis 4th is on the protruding area of the axis of rotation 4th provided on the rear side Z2. As a rotation sensor 92 a punching device, a transmitter or a sensor IC is used. The rotation sensor 92 detects rotation information on the rotation axis 4th by magnetic induction or electromechanical induction.

The power supply unit 300 is with a cover 101 Mistake. The cover 101 covers the control circuit 170 , the power module 160 and the rear side Z2 and the radially outer side Y2 of the power unit heat radiating member 110 and the like. The motor housing 101 is in the form of a tube with a bottom, which has an opening to the front side Z1. In an outer peripheral wall 101b the cover 101 covering the radially outside Y2 is a positive polarity power supply terminal 151 and a negative polarity power supply terminal 152 for connecting the inverter to the external DC power source and a control connector 153 for connecting the control circuit 170 provided with an external control device.

A cover opening area 101C that opens to the outside is in the outer peripheral wall 101b the cover 101 intended. There is no opening area in a rear bottom wall 101a the cover 101 , which covers the rear side Z2, is provided. The front side Z1 in the cover 101 is opened; the opening area is with the electric lathe main body 200 (Retention 2 ) covered.

The control circuit 170 has a circuit device 105 and a plate-shaped (in this example, disk-shaped) control board 103 on which the circuit device 105 is mounted. The control board 103 is formed from a printed circuit board, a ceramic board, a metal board or the like on which in the control circuit 170 included electronic components are mounted. The control board 103 is on the back Z2 of the retainer 2 arranged in such a way that they are removed from the retainer 2 is spaced. The control board 103 extends in the radial direction Y and in the circumferential direction X. In particular, because a vehicle device needs high vibration resistance, the control board is 103 on a housing 102 attached by screwing, heat shrinking, riveting, gluing or the like. Fixing points are spaced from one another by, for example, 50 to 60 mm. This spacing is an example, it can be changed according to a vibration condition and a product shape.

The control circuit 170 is with a housing 102 provided which the front side Z1 of the control circuit 170 covers (the control board 103 in this example). The case 102 is on the back Z2 of the retainer 2 arranged in such a way that it is from the retainer 2 is spaced away. The case 102 extends in the radial direction Y and the circumferential direction X. The power module 160 , a power fixing member, and the power unit heat radiation member 110 are between the housing 102 and the retention 2 arranged in the axial direction.

In the present embodiment, the surface of the housing is 102 on the front side Z1 rectangular to the axial direction Z. The surface of the housing 102 on the front Z1 can be inclined, for example, by 30 ° or less with respect to the plane at right angles to the axial direction Z. The case 102 is provided with a peripheral wall which is the outer peripheral side of the control board 103 covers. The back Z2 of the control board 103 is with the back bottom wall 101a the cover 101 covered.

The case 102 is provided with an opening portion (not illustrated) defined by the control link member mentioned below 164 of the power module 160 is penetrated. The control link component 164 is with the control board 103 connected.

The axis of rotation 4th extends to the rear Z2 of the retainer 2 to a position on the front of the case 102 . Thus the axis of rotation penetrates 4th neither the case 102 nor the control board 103 and is on the front side Z1 of the housing 102 arranged in such a way that it is away from the housing 102 is spaced. This configuration makes it unnecessary to move around the axis of rotation 4th to avoid opening holes in the case 102 and the control board 103 are provided. As a result, it enables the outside diameter of the control board 103 is reduced, the diameter of the power module 160 is downsized and the cost goes down.

If the electronic components can be placed within an area that is compatible with the retainer 2 overlaps in the axial direction Z, it may be allowed that a through hole, which from the axis of rotation 4th is penetrated, in the control board 103 is provided. Additionally, if falling within a range, that with the retention 2 overlaps in the axial direction Z, the control board 103 is not disc-shaped and that the control board 103 is formed of two or more circuit boards and the respective materials thereof are different from each other.

In the power supply unit 300 is used for winding a phase, as in 4th represents a set of series circuits in which a positive polarity power semiconductor device 166H to be connected to the positive polarity side of the DC power source, and a negative polarity power semiconductor device 166L to be connected to the negative polarity side of the DC power supply are connected in series. The connection point at which the positive polarity power semiconductor device 166H and the negative polarity power semiconductor device 166L connected in series is connected to the winding of the corresponding phase. For example, in the case where one set of windings of three phases is provided, three sets of series connections are provided; in the case where two sets of windings of three phases are provided, six sets of series connections are provided.

As the power semiconductor device, a switching device such as an IGBT (Insulated Gate Bipolar Transistor) or a power MOSFET (Power Metal Oxide Semiconductor Field Effect Transistor) is used. Each of these devices is used in an inverter for driving a device such as a motor and controls a rated current of several amps to several hundreds of amps. As the material of the power semiconductor device, security fence (Si), a silicon carbide (SiC), a gallium nitride (GaN), or the like can be used.

In the present embodiment, is part of the power module 160 provided with a single series circuit consisting of the positive polarity power semiconductor device 166H and the negative polarity power semiconductor device 166L consists. As in each of 3rd and 4th illustrated, includes the power module 160
a positive polarity connector 161 which is connected to the collector terminal of the positive polarity power semiconductor device 166H connected is,
a negative polarity connector 162 which is connected to the emitter terminal of the negative polarity power semiconductor device 166L connected is,
a coil connecting member 163 which is connected to the connection point between the emitter terminal of the negative polarity power semiconductor device 166L and the collector terminal of the negative polarity power semiconductor device 166L connected, and
those to the respective gate terminals of the positive polarity power semiconductor device 166H and the negative polarity power semiconductor device 166L and the like connected control connection members 164 . At each of the positive polarity connector 161 , the negative polarity connector 162 , the winding connection component 163 and the control link member 164 metal such as copper or a copper alloy having excellent electrical conductivity and high conductivity can be used; the surface thereof may be placed with a metal material such as Au, Ni, or Sn. In addition, the metal may include any of the terminals and the material for plating two or more kinds thereof. A single power module 160 may be provided with one part of power semiconductor device or with three or more parts of semiconductor devices. According to the number of Power semiconductor devices, the configurations of the connection members and the like are changed.

The positive polarity connector 161 is with a positive polarity wiring member that is connected to the positive polarity power supply terminal 151 is to be connected, connected; the negative polarity connector 162 is with one, with the negative polarity power supply connector 152 negative polarity wiring member to be connected connected; the winding connection component 163 is connected to a winding wiring member to be connected to the winding of the corresponding phase; the control link component 164 is with the control circuit 170 connected.

The power semiconductor device is bonded to wiring strip conductors on a metal board or a ceramic board, a bus bar, and the like with an electrically conductive material such as solder or silver paste. The metal board is formed from a base material such as aluminum or copper. The ceramic board is made of alumina, aluminum nitride, silicon nitride or the like. The bus bar is made of iron, aluminum, copper or the like. A wiring strip conductor and a bus bar are collectively referred to as supply lines.

The power module 160 has the heat radiation member fixing surface 16 on which the power unit heat radiating member 110 is fixed. In the present embodiment, the power semiconductor device is fixed to a surface of the metal board, the ceramic board, the bus bar, or the like; the other surface of the metal board, the ceramic board, the bus bar or the like forms the heat radiation member fixing surface 16 . The heat radiation member fixing surface 16 may be provided on the side equal to the side of the surface of the metal board, the ceramic board, the bus bar or the like in which the power semiconductor device is fixed.

In addition, each of the two opposing surfaces of the power module can be allowed 160 as the heat radiation member fixing surface 16 is used and that power unit heat radiation component 110 is fixed to each of the two opposing surfaces.

In the present embodiment, in view of the connection, is between the heat radiation member fixing surface 16 and the power unit heat radiation member 110 , a thermally conductive material in between to reduce thermal contact resistance. In the case of the metal board or the ceramic board, for example, a material having an insulating performance such as grease, an adhesive, a sheet or gel, or an electrically conductive member such as silver paste is used as the heat conductive material. In the case where the lead against the power unit heat radiating member 110 is to be insulated, a material having an insulating performance is used as the thermally conductive material. Because of these components, the power module 160 and the power unit heat radiation member 110 thermally connected to each other through the intermediary of the thermally conductive material; thus, the number of components and the number of bonding processes can be reduced, and the thermal resistance can be lowered.

The lead and the power unit heat radiating component 110 may be connected to each other by means of an electrically conductive material such as solder when the respective electrical potentials are one and the same; alternatively, the lead bonded to the power semiconductor device can mechanically against the power unit heat radiation component by means of a spring or a screw 110 be pressed. The change from bonding to mechanical pressing lowers thermal resistance and reduces wear in a temperature cycle and at a high temperature; thus the long-term reliability is increased. In addition, the power unit heat radiation member 110 integral with the power module 160 be modularized.

The power module 160 is with a sealing polymer 165 Mistake. The sealing polymer 165 seals the power semiconductor device, the positive polarity connector 161 , the negative polarity connector 162 , the winding connection component 163 , the control link component 164 and the other constituent components. As the sealing polymer 165 For example, a cast polymer such as an epoxy polymer, a silicone polymer or a urethane polymer, a coating material such as a fluoride polymer, on the surface of the power semiconductor device or a cast material such as polybutylene terephthalate (PTB), a polyphylene sulfide (PPS), a polyetheretherketone (PEEK ) or an acrylonitrile butadiene styrene (ABS) are used. The covering of the constituent elements such as the power semiconductor device with the sealing polymer 165 enables, for example, even if foreign materials intrude or even if water or the like including salt, mud or the like is poured thereon, the insulating performance can be ensured. If a material of high hardness, such as an epoxy polymer, is used, you can the components are fixed and therefore the vibration resistance can be increased. When the power module 160 can be isolated and fixed by a method other than inserting the sealing polymer 165 , is the sealing polymer 165 not mandatory.

<Power fixing member 113>

The power fixation component 113 is a fixing component for fixing the power module 160 on the retainer 2 . The power fixation component 113 , for which a material with an electrical and thermal insulation performance is used, enables the power module 160 and the power unit heat radiation member 110 on the retainer 2 to fix in an electrically and thermally insulating manner. For example, as the power fixing member 113 a polymer material such as polybutylene terephthalate (PBT), a polyphenylene sulfide (PPS) or a polyetheretherketone (PEEK) is used.

<Arrangement configuration of power module and light sensor unit heat radiation component>

The power module 160 and the power unit heat radiation member 110 are in a space between the power fixing member 113 and the case 102 arranged in axial direction Z. The heat radiation member fixing surface 16 of the power module 160 extends in the radial direction Y and in the axial direction Z. In the space where the power unit heat radiation member 110 is arranged, a coolant flows in the radial direction Y. It may be allowed that the coolant is a medium other than air (for example, cooling water).

In this configuration, the heat radiation member fixing surface extends 16 of the power module 160 in the radial direction Y and in the axial direction Z, and is the power unit heat radiation member 110 on the circumferential direction first side X1 or the circumferential direction second side X2 of the heat radiation member fixing surface 16 arranged. It is accordingly made possible to extend the power module 160 and the power unit heat radiation member 110 to reduce in the circumferential direction X and the enlargement of the corresponding arrangement areas of the power module 160 and the power unit heat radiation member 110 in the circumferential direction X to reduce. Thus, the mounting of the power module can be suppressed 160 and the power unit heat radiation member 110 the outside diameter of the power supply unit 300 enlarged.

The power unit heat radiating component 110 is on the circumferential direction first side X1 or the circumferential direction second side X2 of the heat radiation member fixing surface 16 arranged. Then flows in the space where the power unit heat radiating member 110 a coolant is arranged in the radial direction Y; thus, by using the space between the retainer 2 and the case 102 spaced apart from each other in the axial direction Z, a coolant flow path can be provided. Accordingly, it is not necessary that in order to bring the coolant to the rear Z2 of the power module 160 to flow, the mounting surfaces of the housing 102 and the control board 103 can be reduced in size. In addition, since the coolant flows in the radial direction Y, it becomes possible to make the coolant around the protruding portion of the rotation axis 4th to happen on the back Z2. Therefore, the slip rings 90 and the brush that is in the vicinity of the protruding portion of the rotation axis 4th the rotation sensor is provided on the rear side Z2 92 and the back bearing 72 can also be cooled efficiently.

In the present embodiment, the heat radiation member fixing surface is 16 is a plane and extends along a plane passing through the center axis C. As long as the heat radiation member fixing surface 16 extending in the radial direction Y and the axial direction Z, depressions and protrusions may be allowed to exist therein; moreover, the heat radiation member fixing surface may be allowed to be 16 is inclined by, for example, 30 ° or less from the plane passing through the center axis C and the heat radiation member fixing surface 16 cuts.

In the present embodiment, the power module is 160 formed in the shape of a rectangular quadrangle (parallelepiped); the connecting components 161 to 164 protrude from the rectangular square. The heat radiation member fixing surface 16 is one of the surfaces of the rectangular quadrilateral. The respective sides of the rectangular quadrilateral are arranged in such a way that they are parallel or perpendicular to the axial direction Z. The width of the power module 160 in the circumferential direction X is smaller than each of the widths thereof in the radial direction Y and the axial direction Z. Each of the sides of the rectangular quadrilateral may be arranged in such a manner that they are not parallel or perpendicular to the axial direction Z but are inclined to the axial direction Z. . In addition, the power module 160 be formed in a shape other than a rectangular quadrangle.

The control link component 164 protrudes from the surface of the power module 160 at the Back Z2 to the back Z2, penetrates the housing 102 and then connects to the control board 103 that are on the back Z2 of the power module 160 is arranged, connected. The positive polarity connector 161 , the negative polarity connector 162 and the coil connecting member 163 protrude from the surface opposite to the heat radiation member fixing surface 16 of the power module 160 in front.

The power unit heat radiating component 110 is on the heat radiation member fixing surface 16 of the power module 160 fixed. The power unit heat radiating component 110 is on the circumferential direction first side X1 or on the circumferential direction second side X2 of the heat radiation member fixing surface 16 arranged. The power unit heat radiating component 110 has a role of radiating heat generated when electric current flows outside under a conduction path in the power semiconductor device. The power unit heat radiating component 110 is formed using a material having a thermal conductivity of 5 W / m · K or greater, for example, metal such as aluminum, an aluminum alloy, copper, or a copper alloy, ceramic, polymer or the like.

The power unit heat radiating component 110 has a plate-shaped base region 110c which extends in the radial direction Y and in the axial direction Z and is on the heat radiation member fixing surface 16 and two or more protruding areas 110d fixed that from the base area 110c to the opposite side of the heat radiation member fixing surface 16 protrude. Due to the fact that two or more protruding areas 110d are provided, the heat radiation area can be increased. In the present embodiment, the respective two or more are protruding portions 110d spaced from each other; each of them is formed in the shape of a plate extending in the X circumferential direction and the Y radial direction. In the present embodiment, each of the two or more plate-shaped protrusion portions is 110d a flat plate extending parallel to the X circumferential direction and the Y radial direction. It is only necessary that each of the two or more plate-shaped protrusion portions 110d extends in the circumferential direction X and in the radial direction Y; it can be allowed that the protrusion area 110d for example, inclines by 30 ° or less from a plane (a plane perpendicular to the axial direction Z) parallel to the circumferential direction X and the radial direction Y.

The base area 110c is formed in the shape of a rectangular quadrangle having a surface the area of which is equal to that of the heat radiation member fixing surface 16 of the power module 160 is. The width of the base area 110c in the circumferential direction X is smaller than each of the widths thereof in the radial direction Y and in the axial direction Z. The protruding portion 110d is formed in the shape of a rectangular flat plate. The base area 110c may be formed in a shape other than a rectangular quadrangle as long as it has a surface attached to the heat radiation member fixing surface 16 is to be fixed; the protrusion area 110d may be formed in a shape other than the shape of a rectangular flat plate. In addition, as long as the heat radiation performance can be secured, it is allowed that the two or more protruding portions 110d not in the power unit heat radiating member 110 are provided.

The width of the overall shape of the power module 160 and the power unit heat radiation member 110 excluding the connection members in the circumferential direction X is smaller than each of the widths thereof in the radial direction Y and the axial direction Z. Accordingly, when the heat radiation member fixing surface 16 is arranged in such a way as to extend in the radial direction Y and the axial direction Z, the corresponding arrangement areas of the power module 160 and the power unit heat radiation member 110 can be reduced in the circumferential direction X.

<Heat radiation member flow path 180>

In the present embodiment, as shown in 5 illustrated are the two power modules 160a and 160b arranged in such a manner that the respective heat radiation member fixing surfaces 16 the same point to each other in the circumferential direction X. The power module 160 on the circumferential direction first side X1 is used as a first side power module 160a designated; the power module 160b on the circumferential direction secondary side X2 is used as a secondary side power module 160b designated.

In a circumferential space between the two power modules 160a and 160b are one or more parts of the power unit heat radiating components 110 and becomes a heat radiation member flow path 180 , which is a flow path through which the coolant flows in the radial direction Y, is formed. In the present embodiment, the two power unit heat radiation members 110a and 110b between the two power modules 160a and 160b arranged; the respective power unit heat radiation components 110 are thermally with the corresponding heat radiation component Fixing surfaces 16 of the two power modules 160a and 160b connected; the space between the power unit heat radiating members 110a and 110b is the heat radiating component flow path 180 through which the coolant flows in the radial direction. The power unit heat radiating component 110a on the circumferential direction first side X1 is used as a first side power unit heat radiation member 110a designated; the power unit heat radiation member 110b on the circumferential direction second side X2 is used as a second side power unit heat radiation member 110b designated.

This configuration enables the heat radiating member flow path 180 through which the coolant flows, the two power modules 160a and 160b is made common and is integrated with it. In addition, because the two power modules 160a and 160b are arranged in such a way that they are close to one another in the circumferential direction X, the corresponding arrangement areas of the power module 160 and the power unit heat radiation member 110 can be reduced in the circumferential direction X and thus the power supply unit 300 can be reduced in size.

It is only necessary that at least two power modules are arranged in such a manner that their respective heat radiation member fixing surfaces 16 face each other in the circumferential direction X and it is only necessary that a single power module 160 not included in the pair is arranged in such a manner that its heat radiation member fixing surface 16 extends in the radial direction Y and the axial direction Z.

<Fixing member flow path 182>

The power fixation component 113 is between the retention 2 and a part arranged by the two power modules 160a and 160b and the two first-side power unit heat radiation members 110a and 110b is constructed in the axial direction Z. A fixation component flow path 182 , which is a flow path through which the coolant flows in the radial direction, is in an axial direction space between the power fixing member 113 and the two power unit heat radiation members 110a and 110b shaped.

This configuration makes it possible to have a coolant flow path also on the front side Z1 of the two power unit heat radiating members 110a and 110b using the power fixing member 113 ; thus, the cooling performance of the light sensor unit heat radiation member can be increased. In addition, because the power fixing member 113 using one for cooling the power unit heat radiating member 110 introduced coolant can be cooled, the thermal reliability of the power fixing member can be improved 113 increase. However, because of the fixing member flow path 182 on the front side Z1 of the power unit heat radiation components 110a and 110b is provided, it is made possible to use the corresponding arrangement areas of the power module 160 and the power unit heat radiation member 110 to prevent it from rising in the X circumferential direction.

The power fixation component 113 has an area which corresponds to the arrangement areas of the two power modules 160a and 160b and the two power unit heat radiating members 110a and 110b includes in the axial direction Z. The power fixation component 113 extends in the radial direction Y and in the circumferential direction X. The power fixing member 113 is in the form of a rectangular plate wider than the corresponding outer surfaces of the two power modules 160a and 160b and the two power unit heat radiating members 110a and 110b formed in the radial direction Y and the circumferential direction X.

Each of the two power unit heat radiating members 110a and 110b has two or more plate-shaped (rectangular plate-shaped in this example) front-side heat radiation member protruding walls 110f that differ from the area thereof (the base area 110c and the protruding areas 110d in this example) that is in the circumferential direction space between the two power modules 160a and 160b are arranged, protrude to the front side Z1 and then on the performance fixing component 113 abut, and which extend in the radial direction Y. The circumferential direction first side X1 and the circumferential direction second side X2 of the fixing member flow path 182 are through the front side heat radiation member protruding walls 110f severed. This configuration enables the into the space between the power fixing member 113 and the power unit heat radiation members 110a and 110b introduced refrigerant is prevented from flowing out of the room and hence the cooling performance is prevented from being impaired.

In the present embodiment, the first-side power unit has heat radiation member 110a a first front side heat radiation member protrusion wall 110f1 from the end portion thereof in the circumferential direction first side X1 (the basic example 110c) protrudes toward the front side Z1, and a second front side heat radiation member protruding wall 110f2 from the end portion thereof on the circumferential direction second side X2 (the protruding portion 110b closest to the front Z1) to the front Z1 protrudes. A first side fixation component flow path 182a is formed from a space formed by the first-side power unit heat radiating member 110a , the power fixing component 113 , the first front-side heat radiation member protrusion wall 110f1 and the second front side heat radiation member protrusion wall 110f2 is surrounded.

The second side power unit heat radiating member 110b has a third front side heat radiation member protrusion wall 110f3 from the end portion thereof on the circumferential direction first side X1 (the protruding portion 110d next to the front side Z1) protrudes to the front side Z1, and a fourth front-side heat radiation member protruding wall 110f4 which protrudes from one end portion thereof on the circumferential direction second side X2 to the front side Z1. A second side fixation component flow path 182b is formed of a space formed by the second-side power unit heat radiation member 110b , the power fixing component 113 , the third front side heat radiation member protrusion wall 110f3 and the fourth front-side heat radiation member protrusion wall 110f4 is surrounded.

<Housing flow path 181>

As in 2 Illustrated is a part of that on the rear side Z2 of the two power unit heat radiating members 110a and 110b arranged housing 102 a control circuit heat radiating member 106 which is a heat radiation member which is thermally connected to the circuit device 105 connected is. The control circuit heat radiating member 106 is a plate-shaped member that extends in the radial direction Y and in the circumferential direction X. The control circuit heat radiating member 106 has an area which corresponds to the respective arrangement areas of the two power modules 160a and 160b and the two power unit heat radiation members 110a and 110b in the axial direction Z surrounds. The control circuit heat radiating member 106 is formed in the shape of a rectangular plate having the same area as the respective arrangement areas of the two power modules 160a and 160b and the two power unit heat radiating members 110a and 110b in the radial direction Y and in the circumferential direction X.

The control circuit heat radiating member 106 is formed using a material having a thermal conductivity of, for example, 5W / m · K or greater, such as metal such as aluminum, an aluminum alloy, copper or a copper alloy, ceramic, polymer or the like. The control circuit heat radiating member 106 is on the surface of the case 102 fixed on the front side Z1. The control circuit heat radiating member may be allowed 106 is not plate-shaped, and that, in order to increase the heat radiation performance, two or more protrusions protruding toward the front side Z1 are provided. A through hole is in part of the housing 102 provided on which the control circuit heat radiating member 106 is fixed; a heat transfer component 106a , which is the control circuit heat radiating member 106 with the control circuit 170 connects is provided in the through hole. As the heat transfer component 106a For example, a thermally conductive sheet metal, a thermally conductive adhesive or the like is used. The provision of the control circuit heat radiating component 106 allows not only the thermally connected circuit device 105 but also the case 102 is cooled; thus the coolability of the entire control circuit 170 increase.

The circuit device 105 associated with the control circuit heat radiating member 106 is to be thermally connected is on the rear side Z2 of the indirect opening / closing sensor 106 arranged. It is desirable that the circuit device 105 , which generates a large amount of heat, is arranged. The circuit device 105 is on the surface of the control board 103 arranged on the rear side Z2. The circuit device 105 can on the front side Z1 of the control circuit heat radiation component 106 be arranged. The heat transfer component 106a is on the surface of an area of the control board 103 arranged on the front side Z1 - the switching device 105 is on the protruding area of the control board 103 arranged. A through hole 106b which is the control board 103 penetrated, is in the area of the control board 103 between the circuit device 105 and the heat transfer component 106a intended. The through hole 106b increases the thermal conductivity between the circuit device 105 and the heat transfer component 106a . In addition, the control circuit heat radiating member can be allowed 106 is not provided.

As in 5 illustrated is a housing flow path 181 , which is a flow path through which the coolant flows in the radial direction, in an axial direction space between the housing 102 (In this example, the control circuit heat radiating component 106 ) and the two power unit heat dissipation components 110a and 110b educated. This configuration enables a coolant flow path to be established even on the rear side Z2 of the two power unit heat radiating members 110a and 110b provide, using the housing 102 ; thus can the cooling performance of the power unit heat radiating member can be increased. In addition, because the control circuit heat radiation member 106 using one for cooling the power unit heat radiating member 110 inserted coolant can be cooled, the coolability of the power module can be 160 increase. In addition, because the housing flow path 181 on the rear side Z2 of the two power unit heat dissipation components 110a and 110b is provided, it is made possible to use the corresponding arrangement areas of the power module 160 and the power unit heat radiation member 110 to prevent it from increasing in the X circumferential direction.

Each of the two power unit heat radiating members 110a and 110b has two or more plate-shaped (rectangular plate-shaped in this example) rear heat radiation member protruding walls 110e from the area thereof (the base area 110c and the protruding areas 110d in this example) protrude in the circumferential direction space between the two power modules 160a and 160b are arranged to the rear Z2 and then on the housing 102 (the control circuit heat radiating member 106 ) and which extend in the radial direction. The circumferential direction first side X1 and the circumferential direction second side X2 of the housing flow path 181 are through the rear heat radiation member protrusion walls 110e partitioned. This configuration allows that to be in the space between the housing 102 and the two power unit heat radiation members 110a and 110b introduced refrigerant is prevented from flowing out of the room and hence the cooling performance is prevented from deteriorating.

In the present embodiment, the first-side power unit has heat radiation member 110a a first rear heat radiation member protrusion wall 110e1 from the end portion thereof on the circumferential direction first side X1 (the base portion 110c) protrudes toward the rear side Z2, and a second rear heat radiation member protruding wall 110e2 from the end portion thereof on the circumferential direction second side X2 (the protruding portion 110d ) next to the rear side Z2) protrudes to the rear side Z2. A first side housing flow path 181a is formed of a space which is passed through the first-side power unit heat radiation member 110a , the housing 102 , the first rear heat radiation member protrusion wall 110e1 and the second rear heat radiation member protrusion wall 110e2 is surrounded.

The second side power unit heat radiating member 110b has a third rear heat radiating member protrusion wall 110e3 from the end portion thereof in the circumferential direction first side X1 (the base portion 110c) protrudes toward the rear side Z2, and a fourth rear heat radiation member protruding wall 110e4 from the end portion thereof on the circumferential direction second side X2 (the protruding portion 110b next to the rear Z2) protrudes to the rear Z2. A second side housing flow path 181b is formed from a space which is shared by the second-side power unit heat radiation member 110b , the housing 102 , the third rear heat radiation member protrusion wall 110e3 and the fourth rear heat radiation member protrusion wall 110e4 is surrounded.

<Cover opening area 101c>

As in 1 illustrated is a cover opening area 101c in the area of the cover 101 on the radially outside Y2 of the heat radiating component flow path 180 , the package flow path 181 and the fixation component flow path 182 intended. Correspondingly, because air as the coolant can be made to get out of the flow path intensely 180 to the river path 182 to flow, the cooling efficiency can be increased. The opening area of the cover opening area 101c is the same as the layout area of the heat radiation member flow path 180 , the package flow path 181 and the fixation component flow path 182 .

In 2 gives an arrow line W1 the drain of the coolant flowing through the heat radiating component flow path 180 flows on; gives the arrow line W2 the flow of coolant flowing through the case flow path 181 flows on; gives the arrow line W3 the flow of the coolant passing through the fixing member flow path 182 flows on. In the present embodiment, after coming from outside through the cover opening area 101c is sucked, air as the coolant flows to the radially inner side Y1 through the heat radiation member flow path 180 , the housing flow path 181 and the fixing member flow path 182 . The corresponding air flows coming from the heat radiating component flow path 180 , the housing flow path 181 and the fixing member flow path 182 are dispensed, combine and then flow to the front side Z1 via the suction opening area 21 in the restraint 2 on the back Z2. Thereafter, the air is made to the radial outside Y2 by the rear air blower fan 82 sent, cools the back coil end portion and the like, and then is sent out through the exhaust port portion 22nd released in the restraint 2 is provided on the radial outside Y2.

As described above, by the rear air blower fan 82 sucked cooling air is not dispersed and is made to intensely to the power unit heat radiation member 110 , the control circuit heat radiating member 106 and the power fixing member 113 to flow, so that the coolability of each of the power module 160 , the control circuit 170 and the power fixing member 113 can be increased. Accordingly, the power module 160 , the control circuit 170 and the power fixing member 113 can be reduced in size and the corresponding reliabilities thereof can be increased.

The heat radiating component flow path 180 , the housing flow path 181 and the fixing member flow path 182 allow the periphery of the power unit heat radiating member 110 , excluding the area of the power module 160 is to be fixed, covered with the coolant so that it is cooled and that the transfer of heat to and from the surrounding components is suppressed; therefore, the respective temperatures of the surrounding components and the power module 160 can be prevented from increasing, and thus the reliability can be increased.

Embodiment 2

Next is an electric lathe 100 according to Embodiment 2 explained. Explanation for components that are the same as those in Embodiment 1 will be omitted. The basic configuration of the electric lathe 100 according to the present embodiment is the same as that of embodiment 1; however, the respective configurations of the housing flowpath differ 181 and the fixation component flow path 182 of those in Embodiment 1. 6th Fig. 13 is a cross-sectional view of main parts such as two power modules 160a and 160b and two power unit heat radiating members 110a and 110b according to the present embodiment, along a plane perpendicular to the radial direction Y of the central portion thereof.

<Fixing member flow path 182>

In the case of Embodiment 1, a fixing member flow path becomes 182 , which is a flow path through which a coolant flows in the radial direction, in an axial direction space between the power fixing member 113 and the two power unit heat radiation members 110a and 110b educated.

Unlike Embodiment 1, in the present embodiment, the power fixing member has 113 a plate-shaped fixing member main body 113a extending in the radial direction Y and the circumferential direction X, and two or more plate-shaped (in this example, rectangular plate-shaped) fixing member protruding walls 113d that of the fixing member main body 113a protrude to the rear side Z2 and to the first-side power unit heat radiating member 110a or 110b abut, and which extend in the radial direction Y. The circumferential direction first side X1 and the circumferential direction second side X2 of the fixing member flow path 182 are through the fixing member protruding walls 113d partitioned off. This configuration enables the into the space between the power fixing member 113 and the two power unit heat radiation members 110a and 110b introduced coolant is prevented from flowing out of the space and therefore the cooling performance is prevented from deteriorating.

In the present embodiment, the power fixing member includes 113
a first fixing member protrusion wall 113d1 leading to the rear side Z2 from a portion of the fixing member main body 113a protrudes toward the end portion of the first-side power unit heat radiating member 110a on the circumferential direction first side X1 points,
a second fixing member protrusion wall 113d2 leading to the rear side Z2 from a portion of the fixing member main body 113a protrudes toward the end portion of the first-side power unit heat radiating member 110a on the circumferential direction second side X2, and the end portion of the second-side power unit heat radiation member 110b on the circumferential direction first side X1, and
a third fixing member protrusion wall 113d3 leading to the rear side Z2 from a portion of the fixing member main body 113a protrudes, which is toward the end portion of the second-side power unit heat radiation member 110b on the circumferential direction second side X1.

A first side fixation component flow path 182a is formed in a space formed by the first-side power unit heat radiation member 110a , the fixing member main body 113a , the first fixing member protrusion wall 113d1 and the second fixing member protruding wall 113d2 is surrounded. A second side fixation component flow path 182b is formed of a space formed by the second-side power unit heat radiation member 110b , the fixing member main body 113a , the second fixing member protrusion wall 113d2 and the third fixing member protruding wall 113d3 is surrounded.

<Housing flow path 181>

As in the case of Embodiment 1, there is a case flow path 181 , which is a flow path through which a coolant flows in a radial direction, in an axial direction space between the housing 102 and the two power unit heat radiation members 110a and 110b educated.

Unlike Embodiment 1, in the present embodiment, the housing 102 a plate-shaped case main body 102a extending in the radial direction Y and in the circumferential direction X, and two or more plate-shaped (in this example, rectangular-plate-shaped) housing projection walls 102d that from the case main body 102a protrude to the front side Z1 and to the power unit first side power unit heat radiation component 110a or 110b abut, and which extend in the radial direction Y on. The circumferential direction first side X1 and the circumferential direction second side X2 of the housing flow path 181 are through the housing protrusion walls 102d partitioned off. This configuration allows that to be in the space between the housing 102 and the two power unit heat radiation members 110a and 110b admitted coolant is prevented from flowing out of the room and therefore the cooling performance is prevented from being deteriorated.

In the present embodiment, the housing includes 102
a first housing protrusion wall 102d1 that to the front side Z1 from the area of the housing main body 102a protrudes toward the end portion of the first-side power unit heat radiating member 110a on the circumferential direction first side X1 points,
a second housing protrusion wall 102d2 that to the front side Z1 from the area of the housing main body 102a protrudes toward the end portion of the first-side power unit heat radiating member 110a on the circumferential direction second side X2, and the end portion of the second side power unit heat radiation member 110b on the circumferential direction first side X1, and
a third housing protrusion wall 102d3 that to the front side Z1 from the area of the housing main body 102a protrudes toward the end portion of the second-side power unit heat radiation member 110b on the circumferential direction second side X2.

A first side housing flow path 181a is formed from a space which is shared by the first-side power unit heat radiating member 110a , the case main body 102a , the first housing protrusion wall 102d1 and the second housing protrusion wall 102d2 is surrounded. A second side housing flow path 181b is formed from a space formed by the second-side power unit heat radiation member 110b , the case main body 102a , the second housing protrusion wall 102d2 and the third housing protrusion wall 102d3 is surrounded.

In the present embodiment, the control circuit is heat radiation member 106 not provided. However, the control circuit heat radiating member may be allowed 106 is provided and the two or more housing projection walls 102d in the control circuit heat radiating member 106 are provided.

Embodiment 3

Next is an electric lathe 100 according to Embodiment 3 explained. Explanation for constituent elements that are the same as those of Embodiment 1 will be omitted. The basic configuration of the electric lathe 100 according to the present embodiment is the same as that of embodiment 1; however, the configuration of the power fixing member differs 113 from that of Embodiment 1. 7th Fig. 16 is a cross-sectional view of main parts such as two power modules 160a and 160b and two first-side power unit heat radiating members 110a and 110b according to the present embodiment along a plane perpendicular to the radial direction Y of the center regions thereof.

<Fixing member flow path 182>

In the present embodiment, different from Embodiment 1, the area of the power fixing member is 113 , the one on the front side Z1 of the two power unit heat radiation components 110a and 110b is arranged, of a power fixing heat radiation member 114 which is a heat radiation member. The power fixing heat radiating member 114 is a plate-shaped member and extends in the radial direction Y and the circumferential direction X. The power fixing heat radiation member 114 is formed using a material having a thermal conductivity of, for example, 5W / m · K or greater, for example, metal such as aluminum, an aluminum alloy, copper or a copper alloy, ceramic, polymer or the like. The power fixing heat radiating member 114 is on the surface of the power fixing member 113 fixed on the back Z2. The power fixing member 113 is not plate-shaped and that, in order to increase the heat radiation performance, two or more protrusions protruding toward the Z2 side are provided. The provision of the Power fixing heat radiating member 114 enables the coolability of the power fixing member 113 to raise.

A fixation component flow path 182 , which is a flow path through which a coolant flows in the radial direction, becomes in an axial direction space between the power fixing heat radiation member 114 and the two power unit heat radiation members 110a and 110b educated. Each of the two power unit heat radiating members 110a and 110b has two or more plate-shaped (rectangular-plate-shaped in this example) front-side heat radiation member protruding walls 110f on that from the area of the same (base area 110c and protrusion area 110d in this example), arranged in the circumferential direction space between the two power modules 160a and 160b protrude to the front side Z1 and then on the power fixing heat radiation component 114 abut, and which extend in the radial direction Y.

Embodiment 4

Next is an electric lathe 100 according to Embodiment 4 explained. Explanation for constituent elements similar to those of Embodiment 1 is omitted. The basic configuration of the electric lathe 100 according to the present embodiment is the same as that of embodiment 1; however, the arrangement configuration of condenser modules is different 116 from that of Embodiment 1. 8th Fig. 13 is a cross-sectional view of main parts such as the two power modules 160a and 160b , the two power unit heat radiating components 110a and 110b , and the two condenser modules 116a and 116b according to the present embodiment along a plane perpendicular to the radial direction Y of the center regions thereof. 9 Fig. 13 is a cross-sectional view of main parts such as the two power modules 160a and 160b , the two power unit heat radiating components 110a and 110b and the two condenser modules 116a and 116b according to the present embodiment along a plane perpendicular to the axial direction Z.

There will be two or more condenser modules 116 provided, in each of which a smoothing capacitor 115 , the one with the power module 160 is to be connected, is provided. The smoothing capacitor 115 is with the positive polarity connector 161 and the negative polarity connecting member 162 of the power module 160 connected. The condenser module 116 is formed in such a way that the exterior of the smoothing capacitor 115 is covered with polymer. The condenser module 116 is formed in the shape of a rectangular quadrangle; two connecting components (not illustrated) protrude from the rectangular square.

The respective sides of the rectangular quadrilateral are arranged in such a way that they are parallel to or perpendicular to the axial direction Z.

In the present embodiment, the condenser module 116a arranged from the circumferential direction first side X1 of the power module 160a to be spaced; the condenser module 116b is arranged from the circumferential direction second side X2 of the power module 160b to be spaced. The condenser module 160a on the circumferential direction first side X1 is called a first side condenser module 116a designated; the condenser module 116b on the circumferential direction second side X2 is called the second side condenser module 116b designated.

The smoothing capacitor 115 in the first side condenser module 116a is with the positive polarity connector 161 and the negative polarity connecting member 162 of the first page performance module 160a connected. The smoothing capacitor 115 in the second-side condenser module 116b is with the positive polarity connector 161 and the negative polarity connecting member 162 of the second-side power module 160b connected. The connecting lines can be short-circuited.

In the present embodiment, the surface of the first side condenser module 116a on the circumferential direction second side X2 and the surface of the first side power module 160a arranged at a distance from one another and parallel to one another on the circumferential direction first side X1. The surface of the second side condenser module 116b on the circumferential direction first side X1 and the surface of the second side power module 160b on the circumferential direction second side X2 are spaced from each other and arranged parallel to each other. The width of the first side condenser module 116a in the radial direction Y is the same as that of the power module 160a in the radial direction Y; the width of the condenser module 116b in the radial direction Y is the same as that of the power module 160b in the radial direction Y.

A condenser flow path 183 , which is a flow path through which a coolant flows in the radial direction Y, becomes in a circumferential direction space between the power module 160 and the condenser module 116 formed facing each other. A first-side condenser flow path becomes specific 183a , which is a flow path through which the coolant flows in the radial direction Y, in a circumferential direction space between the first-side power module 160a and the first side condenser module 116a educated. A second side Condenser flow path 183b , which is a flow path through which the coolant flows in the radial direction Y, is in a circumferential direction space between the second-side power module 160b and the second side condenser module 116b educated.

This configuration makes it possible to provide a coolant flow path even on the opposite side of the heat radiation member fixing surface 16 of the power module 160 using the condenser module 116 ; thus the coolability of the power module 160 increase. In addition, because the condenser module 116 can be cooled using the coolant that has been supplied to the power module 160 to cool can the coolability of the movement command part 116 be raised.

In the present embodiment, the power fixing member is fixed 113 also the two condenser modules 116a and 116b on the retainer 2 . The power fixation component 113 has an area that contains the corresponding arrangement areas of the two power modules 160a and 160b , the two power unit heat radiating components 110a and 110b and the two condenser modules 116a and 116b includes in the axial direction Z. The power fixation component 113 is in the form of a rectangular plate wider than the corresponding arrangement areas of the two power modules 160a and 160b , the two power unit heat radiation components 110a and 110b and the two condenser modules 116a and 116b formed in the radial direction Y and in the circumferential direction X.

The corresponding surfaces of the two condenser modules 116a and 116b on the front side Z1 abut the surface of the power fixing component 113 on the back Z2. The width of each of the condenser modules 116a and 116b is shorter than (essentially half as long as) the distance from the housing 102 to the power fixing component 113 in the axial direction Z. Accordingly, there is a space in the axial direction between the housing 102 and each of the condenser modules 116a and 116b ; thus point the corresponding areas of the two power modules 160a and 160b on the rear side Z2 not to the two condenser modules 116a and 116b down.

In the present embodiment, the housing 102 a plate-shaped case main body 102a extending in the radial direction Y and in the circumferential direction X, and two plate-shaped outer side case protruding walls 102e1 and 102e2; on one side of the circumferential direction X1 of the power module 160a the outside housing protrusion wall protrudes 102e1 from the case main body 102a to the front side Z1 and extends in the radial direction Y; on the other circumferential direction second side X2 of the power module 160b the outside housing protrusion wall protrudes 102e2 from the case main body 102a to the front side Z1 and extends in the radial direction Y. The outside case protruding wall 102e1 on the circumferential direction first side X1 of the first side power module 160a is called a first-side outer-side housing protrusion wall 102e1 designated; the outside case protrusion wall 102e1 on the circumferential direction second side X2 of the second side power module 160b is called a second-side outer-side housing protrusion wall 102e2 designated.

In the present embodiment, both the case main body 102a as well as the two outside housing protrusion walls 102e1 and 102e2 from the control circuit heat radiating member 106 educated. The surface of the first-side outer-side housing protrusion wall 102e1 on the circumferential direction second side X2 and the surface of the first side power module 160a on the circumferential direction first side X1 are spaced from each other and arranged parallel to each other. The surface of the second-side outer-side housing protrusion wall 102e2 on the circumferential direction first side X1 and the surface of the second side power module 160b on the circumferential direction second side X2 are spaced from each other and arranged parallel to each other. The width of the outside housing protrusion wall 102e1 in the radial direction Y is the same as that of the power module 160a in the radial direction Y; the width of the outside case protrusion wall 102e2 in the radial direction Y is the same as that of the power module 160b in the radial direction Y.

An outside case flow path 184 , which is a flow path through which the coolant flows in the radial direction Y, is in a circumferential direction space between the power module 160 and the outside case protrusion wall 102e1 formed that point to each other; an outside case flow path 184 is in a circumferential space between the power module 160 and the outside case protrusion wall 102e2 formed that point to each other. Specific is a first-side-outside-case flow path 184a , which is a flow path through which the coolant flows in the radial direction Y, in a circumferential direction space between the first-side power module 160a and the first-side outer-side case protrusion wall 102e1 educated. A second side outside case flow path 184b , which is a flow path through which the coolant flows in the radial direction Y, is in a circumferential direction space between the second-side power module 160b and the second-side outer-side case protrusion wall 102e2 educated.

In this configuration, it enables the provision of the two outside case protruding walls 102e1 and 102e2 in the housing 102 , a coolant flow path also on each of the respective opposite sides of the heat radiating member fixing surfaces 16 of the power modules 160 provide; thus the coolability of the power module 160 increase. In addition, because the housing 102 (Control circuit heat radiation component 106 ) using the coolant that is introduced to the power module 160 to cool, can be cooled, the coolability of the condenser module 170 increase.

In the present embodiment, the end surface abuts the first-side outer-side case protruding wall 102e1 on the front side Z1 to the end face of the first side condenser module 116a on the back Z2. The end face of the second-side outer-side housing protrusion wall 102e2 on the front side Z1 abuts the end face of the second-side condenser module 116b on the back Z2. Thus become the first side condenser flow path 183a and the first side outer case flow path 184a connected to each other in the axial direction Z; the second side condenser flow path 183b and the second side outer case flow path 184b are connected to each other in the Z axial direction.

This configuration allows the coolant to cover the entire surface of the opposite side of the heat radiation member fixing surface 16 of the power module 160 cools and therefore the cooling performance is increased, and enables the coolant to be prevented from flowing out of the condenser flow path and the outside case flow path, and hence the cooling performance is prevented from being impaired.

A cover opening area 101c is in the area of coverage 101 on the radially outside Y2 of the heat radiating component flow path 180 , the package flow path 181 , the fastener flow path 182 , the condenser flow path 183 and the outside case flow path 184 intended.

Only one of the may be allowed through the condenser module 116 formed condenser flow path 183 and that through the outside case protrusion wall 102e formed outside case flow path 184 provided. In the case where the outside case flow path 184 is not provided and only the condenser flow path 183 is provided, it can be allowed that the width of the condenser module 116 in the axial direction Z is increased and that the surface area of the capacitor module 116 on the back Z2 on the housing 102 (the control circuit heat radiating member 106 ) triggers. In the case where the condenser flow path 183 is not provided and only the outside case flow path 184 is provided, the width of the outside housing protrusion wall may be allowed 102e in the axial direction Z increases and that the surface of the outside case protrusion wall 102e on the front side Z1 on the power fixing component 113 bumps.

It may be allowed that instead of the condenser module 116 or the outside case protrusion wall 102e another component, such as another condenser module 116 is arranged to form a flow path.

Embodiment 5

Next is an electric lathe 100 according to Embodiment 5 explained. Explanation for constituent elements same as those in Embodiment 1 is omitted. The basic configuration of the electric lathe 100 according to the present embodiment is the same as that of embodiment 1; however, the respective configurations of the case differ 102 and the power fixing member 113 from those of Embodiment 1.

10 Fig. 13 is a cross-sectional view of main parts such as two power modules 160a and 160b and two power unit heat radiating members 110a and 110b according to the present embodiment along a plane perpendicular to the radial direction Y of the central regions thereof. 11 Fig. 13 is a cross-sectional view of main parts such as two power modules 160a and 160b and two power unit heat radiating members 110a and 110b according to the present embodiment along a plane at right angles to the axial direction Z.

The first side power unit heat dissipating member 110a and the second side power unit heat radiation member 110b are arranged in such a way that they are spaced from each other in the circumferential direction X. In the present embodiment, the distance therebetween in the circumferential direction X is widened compared with that in Embodiment 1.

The case 102 has a plate-shaped case main body 102a extending in the radial direction Y and in the circumferential direction X, and a plate-shaped inner side case protruding wall 102f that from the case main body 102a to the front side Z1 in a circumferential direction space between the first-side power unit heat radiation component 110a and the second-side power unit Heat radiating component 110b protrudes, and which extends in the radial direction Y. Corresponding inside case flow paths 185 each of which is a flow path through which a coolant flows in the radial direction Y are in a circumferential direction space between the inside case protrusion wall 102f and the first-side power unit heat radiation member 110a and in a circumferential space between the inside case protrusion wall 102f and the second side power unit heat radiation member 110b educated.

In the present embodiment, both the case main body 102a and the inside case protrusion wall 102f from the control circuit heat radiating member 106 educated. The surface of the inside case protrusion wall 102f on the circumferential direction first side X1 and the end surface of the first side power unit heat radiation member 110a (the protrusion areas 110d ) on the circumferential direction second side X2 are spaced from one another and arranged parallel to one another. The surface of the inside case protrusion wall 102f on the circumferential direction second side X2 and the end surface of the second side power unit heat radiation member 110b (the protrusion areas 110d ) on the circumferential direction first side X1 are spaced from one another and arranged parallel to one another. The width of the inside case protrusion wall 102f in the radial direction Y is the same as that of each of the two power unit heat radiating members 110a and 110b in the radial direction Y.

This configuration enables that by using the coolant flowing through the circumferential direction space between the two power unit heat radiation members 110a and 110b flows, the housing 102 (the control circuit heat radiating member 106 ) is cooled, and therefore the coolability of the control circuit 170 is increased.

The case 113 has a plate-shaped fixing member main body 113a extending in the radial direction Y and the circumferential direction X, and a plate-shaped inside fixing member protruding wall 113f that of the fixing member main body 113a to the rear side Z2 into a circumferential direction space between the first-side power unit heat radiation member 110a and the second side power unit heat radiation member 110b protrudes, and which extends in the radial direction Y. Corresponding inside fixture flow paths 186 each of which is a flow path through which the coolant flows in the radial direction Y are in a circumferential direction space between the inside fixing member protrusion wall 113f and the first-side power unit heat radiation member 110a and in a circumferential space between the inside fixing member protruding wall 113f and the power unit second-side power unit heat radiation member 110b educated.

In the present embodiment, the fixing member is both main body 113a and the inside fixing member protrusion wall 113f from the power fixing heat radiation member 114 explained in Embodiment 3. The surface of the inside fixing member protruding wall 113f in the circumferential direction first side X1 and the end surface of the first side power unit heat radiating member 110a (the protrusion areas 110d ) on the circumferential direction second side X2 are arranged at a distance from and parallel to one another. The surface of the inside fixing member protrusion wall 113f on the circumferential direction second side X2 and the end face of the second side power unit heat radiation member 110b (the protrusion areas 110d ) on the circumferential direction first side X1 are spaced from one another and arranged parallel to one another. The width of the inside fixing member protrusion wall 113f in the radial direction Y is the same as that of each of the power unit heat radiating members 110a and 110b in the radial direction Y.

This configuration enables using the coolant flowing through the circumferential direction space between the two power unit heat radiation members 110a and 110b flows, the power fixing member 113 (the power fixing heat radiation member 114 ) is cooled and therefore the coolability of the control circuit 170 is increased.

In the present embodiment, the end face abuts the inside case protrusion wall 102f on the front side Z1 on the end surface of the inside fixing member protruding wall 113f on the back Z2. The inside case flow path is similar 185 and the inside fixing member flow path 186 connected to each other in the Z axial direction. In the present embodiment, the protrusion width is the inside case protrusion wall 102f in the axial direction Z is the same as the protrusion width of the inside fixing member protrusion wall 113f in the axial direction Z. The ratio between the respective protrusion widths thereof may be allowed to vary according to the need for cooling the control circuit 170 and the power fixing member 113 is changed.

Embodiment 6

Next is an electric lathe 100 according to Embodiment 6 explained. The Explanation for components that are the same as those in Embodiment 1 will be omitted. The basic configuration of the electric lathe 100 according to the present embodiment is the same as that of Embodiment 1; however, the distance between the two power unit heat radiating members differs 110a and 110b in the circumferential direction X from that in Embodiment 1. 12th Fig. 13 is a cross-sectional view of main parts such as two power modules 160a and 160b and two power unit heat radiating members 110a and 110b according to the present embodiment along a plane perpendicular to the radial direction Y of the center regions thereof. 13th Fig. 13 is a cross-sectional view of main parts such as two power modules 160a and 160b and two power unit heat radiating members 110a and 110b according to the present embodiment along a plane perpendicular to the axial direction Z.

The first side power unit heat dissipating member 110a and the second side power unit heat radiation member 110b are arranged in such a way that they are spaced from each other in the circumferential direction X; the circumferential directional distance therebetween on the radially outer side Y2 is greater than the circumferential directional distance therebetween on the radially inner side Y1.

Since this configuration increases the opening area of the air inlet and therefore reduces the wind speed in the vicinity of the air inlet, the pressure loss in the coolant flow path decreases; thus, this configuration contributes to an increase in the air volume of the entire electric lathe.

As the position progresses downstream in the radial inner side Y1, the temperature of the coolant increases and the thickness of the temperature boundary layer increases; thus, on the radially inner side Y1, the local heat transfer rate of the power unit heat radiating member is prone to decrease. The above configuration makes the cross-sectional area of the flow path decrease with advancing position toward the radially inner side Y1; thus the flow rate increases. Accordingly, a decrease in the heat transfer rate on the radially inner side Y1 can be reduced. As a result, the change in gamma radiation power of the power unit heat radiating member between the radially outer side Y2 and the radially inner side Y1 is allowed to be reduced and therefore the power module is cooled uniformly.

Embodiment 7

Next is an electric lathe 100 according to Embodiment 7 explained. Explanation for constituent elements same as those in Embodiment 1 is omitted. The basic configuration of the electric lathe 100 according to the present embodiment is the same as that of embodiment 1; however, the distance between the two power unit heat radiating members differs 110a and 110b in the circumferential direction X from that in Embodiment 1. 14th Fig. 13 is a cross-sectional view of main parts such as two power modules 160a and 160b and two power unit heat radiating members 110a and 110b according to the present embodiment, along a plane perpendicular to the radial direction Y of the center regions thereof. 15th Fig. 13 is a cross-sectional view of main parts such as two power modules 160a and 160b and two power unit heat radiating members 110a and 110b according to the present embodiment along a plane perpendicular to the axial direction Z.

As is the case with Embodiment 6, they are the first-side power unit heat radiating member 110a and the second side power unit heat radiation member 110b arranged in such a manner as to be spaced from each other in the circumferential direction X; the circumferential directional distance therebetween on the radially outer side Y2 is greater than the circumferential directional distance therebetween on the radially inner side Y1.

<Inside case protrusion wall>

The case 102 has a plate-shaped case main body 102a extending in the radial direction Y and the circumferential direction X, and two plate-shaped inner side case protruding walls 102f1 and 102f2 that from the case main body 102a to the front side Z1 in a circumferential direction space between the first-side power unit heat radiation component 110a and the second side power unit heat radiation member 110b protrude, and which extend in the radial direction Y. In the circumferential direction distance between the first-side power unit heat radiation member 110a and the second side power unit heat radiation member 110b are the two inside case protrusion walls 102f1 and 102f2 arranged in such a way that they are spaced apart from each other in the circumferential direction X and in such a way that they shift to the radially outer side Y2.

Inside case flow paths 185 , each of which is a river path through which a Coolant flowing in the radial direction are in a circumferential direction space between the first-side power unit heat radiation member 110a and the inside case protrusion wall 102f1 on the circumferential direction first side X1 in a circumferential direction space between the inner side case protrusion walls 102f1 on the circumferential direction first side X1 and the inside case protrusion wall 102f2 on the circumferential direction second side X2, and in a circumferential direction space between the inner side case protrusion wall 102f2 on the circumferential direction second side X2 and the second side power unit heat radiation member 110b educated.

This configuration enables that by providing the two inside case protrusion walls 102f1 and 102f2 the heat radiation area is increased, and hence the coolability of the control circuit 170 is increased.

In the present embodiment, both the case main body 102a as well as the two inside case protrusion walls 102f1 and 102f2 from the control circuit heat radiating member 106 educated. The circumferential distance between the two inside case protrusion walls 102f1 and 102f2 on the radially outer side Y2 is greater than the circumferential directional distance therebetween on the radially inner side Y1.

<Inside fixing member protrusion wall>

The power fixation component 113 has a plate-shaped fixing member main body 113a extending in the radial direction Y and in the circumferential direction X, and two plate-shaped inside fixing member protruding walls 113f1 and 113f2 extending from the fixing member main body 113a to the rear side Z2 in a circumferential direction space between the first-side power unit heat radiation member 110a and the second side power unit heat radiation member 110b protrude, and which extend in the radial direction Y. In the circumferential direction distance between the first-side power unit heat radiation member 110a and the second side power unit heat radiation member 110b are the two plate-shaped projection walls 113f1 and 113f2 arranged in such a way that they are spaced from each other in the circumferential direction X, and in such a way that they shift to the radially outer side Y2.

Inside fixture flowpaths 186 each of which is a flow path through which the coolant flows in the radial direction are in a circumferential direction space between the first-side power unit heat radiation member 110a and the inside fixing member protruding wall 113f1 on the circumferential direction first side X1, in a circumferential direction space between the inner side fixing member protruding walls 113f1 on the circumferential direction first side X1 and the inside fixing member protruding wall 113f2 on the circumferential direction second side X2, and in a circumferential direction space between the inside fixing member protruding wall 113f2 on the circumferential direction second side X2 and the second side power unit heat radiation member 110b educated.

This configuration enables that by providing the two inside fixing member protruding walls 113f1 and 113f2 the heat radiation area is increased, and hence the coolability of the power fixing member 113 is increased.

In the present embodiment, both the fixing member main body 113a as well as the two inside fixing member protruding walls 113f1 and 113f2 from the power fixing heat radiation member 114 explained in Embodiment 3. The circumferential directional distance between the two inside fixing member protruding walls 113f1 and 113f2 on the radially outer side Y2 is greater than the circumferential directional distance therebetween on the radially inner side Y1.

In the present embodiment, the end face abuts each of the two inside case protrusion walls 102f1 and 102f2 on the front side Z1 on the corresponding end face of each of the two inside fixing member protruding walls 113f1 and 113f2 on the back Z2. The inside case flow path is similar 185 and the inside fixing member flow path 186 connected to each other in the Z axial direction. In the present embodiment, the respective protrusion widths of the two inside case protrusion walls are 102f1 and 102f2 in the axial direction Z is the same as the corresponding respective projection widths of the two inside fixing member projection walls 113f1 and 113f2 in the axial direction Z. The ratio between the respective protrusion widths thereof may be allowed to vary according to the need for cooling the power module 160 and the power fixing member 113 is changed.

Embodiment 8

Next is an electric lathe 100 according to Embodiment 8 explained. The explanation for components that are the same as those in Embodiment 1 will be omitted. The basic configuration of the electric lathe 100 according to the present embodiment is the same as that of embodiment 1; however differs the distance between the two power unit heat radiating members increases 110a and 110b in the circumferential direction X from that of Embodiment 1. 16 Fig. 13 is a cross-sectional view of main parts such as two power modules 160a and 160b and two power unit heat radiating members 110a and 110b according to the present embodiment along a plane perpendicular to the radial direction Y of the center regions thereof. 17th Fig. 13 is a cross-sectional view of main parts such as the two power modules 160a and 160b and the two power unit heat radiation members 110a and 110b according to the present embodiment along a plane perpendicular to the axial direction Z.

It becomes a condenser module 116 provided that with a smoothing capacitor 115 is provided with the power module 160 is to be connected. The condenser module 116 is arranged in such a manner as to be toward the radially outer side Y2 in the circumferential direction space between the first-side power unit heat radiation member 110a and the second side power unit heat radiation member 110b shifts.

This configuration enables using the in the space between the two power unit heat radiating members 110a and 110b introduced coolant the condenser module 116 is cooled and therefore the coolability of the condenser module 116 is increased.

As in 17th illustrated is the condenser module 116 formed in the shape of a trapezoid in such a way that its cross section along a plane perpendicular to the axial direction Z turns to the radially outer side Y2 according to the shape of the space between the first-side power unit heat radiating member 110a and the second side power unit heat radiation member 110b spreads. The condenser module 116 abuts and is fixed to the power fixing component 113 . The width of the condenser module 116 in the axial direction Z is shorter than (essentially half as long as) the distance from the housing 102 to the power fixing component 113 in the axial direction Z. The condenser modules are accordingly 116 and the case 102 spaced from each other in the axial direction.

<Inside case protrusion wall>

As in the case of Embodiment 7, the housing has 102 a plate-shaped case main body 102a extending in the radial direction Y and in the circumferential direction X, and two plate-shaped inner side case protruding walls 102f1 and 102f2 that from the case main body 102a to the axial direction Z1 in a circumferential direction space between the first-side power unit heat radiation member 110a and the second side power unit heat radiation member 110b protrude, and which extend in the radial direction Y. In the circumferential direction distance between the first-side power unit heat radiation member 110a and the second side power unit heat radiation member 110b the two inside housings are protruding walls 102f1 and 102f2 arranged in such a way that they are spaced from each other in the circumferential direction X and in such a way that they are shifted to the radially outer side Y2.

Inside case flow paths 185 each of which is a flow path through which a coolant flows in the radial direction are in a circumferential direction space between the first-side power unit heat radiation member 110a and the inside case protrusion wall 102f1 on the circumferential direction first side X1, in a circumferential direction space between the inner side case protrusion wall 102f1 on the circumferential direction first side X1 and the inside case protrusion walls 102f2 on the circumferential direction second side X2, and in a circumferential direction space between the inner side case protrusion wall 102f2 on the circumferential direction second side X2 and the second side power unit heat radiation member 110b educated.

In the present embodiment, both the case main body 102a as well as the two inside case protrusion walls 102f1 and 102f2 from the control circuit heat radiating member 106 educated. The circumferential distance between the two inside case protrusion walls 102f1 and 102f2 on the radially outer side Y2 is greater than the circumferential directional distance therebetween on the radially inner side Y1. The corresponding end faces of the two inside case protrusion walls 102f1 and 102f2 on the front side Z1 butt against the end face of the condenser module 116 on the back Z2.

Although the present application is described above in terms of various exemplary embodiments and implementations, it should be understood that the various features, aspects, and functions described in one or more of the individual embodiments are not in applicability to the particular embodiment in which they are described are limited, but instead may be applied to one or more of the embodiments alone or in various combinations. Therefore, an unlimited number of non-exemplified variant examples are conceivable within the scope of the technology disclosed in the present disclosure. For example is the case includes in which at least one constituent element is modified, added or deleted, and the case in which at least one constituent element is extracted and then combined with constituent elements of other embodiments.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• JP 2016537959 A [0003, 0004]
• JP 2017112807 A [0003, 0005, 0006]

Claims (17)

An electric lathe (100) comprising: a stator (3) provided with windings of two or more phases; a rotor (6) which is arranged in a radial inner side (Y1) of the stator (3), a rotation axis (4) which rotates integrally with the rotor (6); a bracket (2) which contains the stator (3) and the rotor (6) and pivotally holds the axis of rotation (4); two or more power modules (160) each provided with a power semiconductor device for energizing and de-energizing the windings; a power unit heat radiation member (110) that is a heat radiation member thermally connected to a heat radiation member fixing surface (16) of the power module (160); a control unit (170) that controls the power semiconductor device; and a power fixing member (113) for fixing the power module (160) to the bracket (2); wherein on an axis direction side (Z2) of the rotation axis (4) rather than the bracket (2), the two power modules (160a, 160b) are arranged in such a way that their respective heat radiation member fixing surfaces (16) are in a circumferential direction (X) to each other point; the heat radiation member fixing surface (16) extends in the radial direction (Y) and in the axial direction (Z); in a circumferential direction space between the two power modules (160a, 160b), the one or more power unit heat radiation members (110) are arranged and a heat radiation member flow path that is a flow path through which the coolant flows in the radial direction (Y) is formed; and wherein the power fixing member (113) is arranged between the bracket (2) and a part composed of the two power modules (160a, 160b) and the one or more power unit heat radiation members (110), in the axial direction (Z) ; a fixing member flow path (182) that is a flow path through which a coolant flows in the radial direction (Y) is formed in an axis direction space between the power fixing member (113) and the one or more power unit heat radiating members (110). Electric lathe (100) according to Claim 1 wherein each of the one or more power unit heat radiation members (110) has two or more plate-shaped opposite side heat radiation member protrusion walls (110f) protruding from portions thereof, arranged in a circumferential space between the two power modules (160a, 160b) to the other axial direction side ( Z1) and then abut the power fixing member (113), and which extend in the radial direction (Y), and wherein one circumferential direction side (X1) and the other circumferential direction side (X2) of the fixing member flow path (182) through the other-side heat radiating member protrusion wall ( 110f) are divided. Electric lathe (100) according to Claim 1 wherein the power fixing member (113) has a plate-shaped fixing member main body (113a) extending in the radial direction (Y) and in the circumferential direction (X), and two or more plate-shaped fixing member protruding walls (113d) extending from the fixing member -Main bodies (113a) protrude to one axial direction side (Z2) and then abut the power unit heat radiation member (110), and extend in the radial direction (Y), and one circumferential direction side (X1) and the other circumferential direction side (X2) of the Fixing member flow path (182) is partitioned by the fixing member protrusion wall (113d). Electric lathe (100) according to one of the Claims 1 to 3rd , further comprising a housing (102) which covers the other axial direction side (Z1) of the control circuit (170), the housing (102) being attached to the one axial direction side (Z2) rather than the bracket (2) in such a way that it is spaced from the bracket (2) and extends in the radial direction (Y) and in the circumferential direction (X) with the power module (160), the power fixing member (113) and the power unit heat radiating member (110) in one space are arranged between the bracket (2) and the housing (102) in the axial direction (Z), and wherein the axis of rotation (4) extends to the one axial direction side (Z2) from the bracket (2) to a position in front of the housing (102 ) extends. Electric lathe (100) according to one of Claims 1 to 4th wherein the control circuit (170) has a housing (102) which covers the other axial direction side (Z1) of the control circuit (170); the housing (102) is arranged on the one axial direction side (Z2) rather than the holder (2) in such a way that it is spaced from the holder (2) and extends in the radial direction (Y) and the circumferential direction (X) the rotation axis (4), the power module (160), the power fixing member (113) and the power unit heat radiating member (110) being arranged in a space between the bracket (2) and the housing (102) in the axial direction (Z) , and wherein a housing flow path (181) which is a flow path through which a coolant in the Radial direction (Y) flows, is formed in an axial direction space between the housing (102) and the one or more power unit heat radiating members (110). Electric lathe (100) according to Claim 5 wherein each of the one or more power unit heat radiation members (110) has two or more plate-shaped single-side heat radiation member protrusion walls (110e) protruding from portions thereof arranged in a circumferential space between the two power modules (160a, 160b) the one axial direction side (Z2), and then abut the housing (102), and which extend in the radial direction (Y), and wherein one circumferential direction side X1 and the other circumferential direction side (X2) of the housing flow path (181) through the one-side heat radiation component Projecting wall (110e) are divided. Electric lathe (100) according to Claim 5 , wherein the case (102) has a plate-shaped case main body (102a) extending in the radial direction (Y) and in the circumferential direction (X), and two or more plate-shaped case projection walls (102d) extending from the case main body (102a) to the other axial direction side (Z1 and then butt against the power unit heat radiation member (110), and they extend in the radial direction (Y), and one circumferential direction first side (X1) and the other circumferential direction second side (X2) of the housing flow path (181 ) are divided by the housing projection wall (102d). Electric lathe (100) according to one of the Claims 5 to 7th , wherein the housing (102) has a plate-shaped housing main body (102a) which extends in the radial direction (Y) and the circumferential direction (X), and two plate-shaped outer side housing projection walls (102e1, 102e2), which from the housing main body (102a) to other axial direction side (Z1) on one circumferential direction side (X1) and the other circumferential direction side (X2) protrude rather than the two corresponding respective power modules (160a, 160b), and which extend in the radial direction (Y), and wherein an outer side case flow path ( 184a, 184b), which is a flow path through which a coolant flows in the radial direction (Y), is formed in a circumferential direction space between the power module (160a, 160b) and the outside case protrusion wall (102e1, 102e2) facing each other. Electric lathe (100) according to one of the Claims 5 to 8th , further comprising: a single-side power unit heat radiation member (110a) fixed to the heat radiation member fixing surface (16) of one of the two power modules (160a, 160b); and an other side power unit heat radiation member (110b) fixed to the heat radiation member fixing surface (16) of the other of the two power modules (160a, 160b), the single side power unit heat radiation member (110a) and the other side power unit heat radiation member (110b) are arranged in such a way that they are spaced from each other in the circumferential direction (X), wherein the housing (102) has a plate-shaped housing main body (102a) extending in the radial direction (Y) and in the circumferential direction (X) and a plate-shaped inside case protruding wall (102f) protruding from the case main body (102a) to the other axial direction side (Z1) in a circumferential direction space between the one-side power unit heat radiating member (110a) and the other-side power unit heat radiating member (110b) , and which extends in the radial direction (Y), and wherein inner side housing Flow paths (185), each of which is a flow path through which a coolant flows in the radial direction (Y), in a circumferential direction space between the inside case protrusion wall (102f) and the single-side power unit heat radiation member (110a) and in a circumferential direction space between the inside case protrusion wall (102f) and the other side power unit heat radiation member (110b) are formed. Electric lathe (100) according to one of the Claims 5 to 9 , wherein a portion of the housing (102), which is arranged on the one axial direction side (Z2) of the one or more power unit heat radiating members (110), is formed from a control circuit heat radiating member (106) which is a heat radiating member that is thermally with a circuit device (105) of the control circuit (170) is connected. Electric lathe (100) according to one of the Claims 1 to 10 , further comprising: a single-side power unit heat radiation member (110a) fixed to the heat radiation member fixing surface (16) of one of the two power modules (160a, 160b); and an other side power unit heat radiation member (110b) fixed to the heat radiation member fixing surface (16) of the other of the two power modules (160a, 160b), the single side power unit heat radiation member (110a) and the other side power unit heat radiation member (110b) in are arranged such that they are spaced from each other in the circumferential direction (X), wherein the power fixing member (113) has a plate-shaped fixing member main body (113a) extending in the radial direction (Y) and in the circumferential direction (X), and a plate-shaped inside fixing member protrusion wall (113f) extending from the fixing member main body (113a) to the one axial direction side (Z2) in a circumferential direction space between the one-side power unit heat radiating member (110a) and the other-side power unit heat radiating member (110b). protrudes, and which extends in the radial direction (Y), and wherein inside fixing member flow paths (186), each of which is a flow path through which a coolant flows in the radial direction (Y), in a circumferential direction space between the inside fixing member Protrusion wall (113f) and the single-side power unit heat radiation member (110a) and in a circumferential direction space are formed between the inside fixing member protruding wall (113f) and the other side power unit heat radiating member (110b). Electric lathe (100) according to one of the Claims 1 to 11 wherein a portion of the power fixing member (113) disposed on the other axial direction side of the one or more power unit heat radiating member (110) is formed of a power fixing heat radiating member (114) that is a heat radiating member. Electric lathe (100) according to one of Claims 1 to 12th , further comprising two or more condenser modules (116), in each of which a smoothing condenser (115) to be connected to the condenser module (116) is provided, one (116a) of the two condenser modules (116a, 116b) at one Circumferential direction side (X1) corresponding one of the two power modules (160a, 160b) is arranged and the other one (116b) of the two condenser modules (116a, 116b) is arranged on the other circumferential direction side (X2) of the other of the two power modules (160a, 160b) , and wherein a condenser flow path (183a, 183b), which is a flow path through which a coolant flows in the radial direction (Y), in a circumferential direction space between the power module (160a, 160b) and the condenser module (116a, 116b) mutually wise, is formed. Electric lathe (100) according to one of the Claims 1 to 13th , further comprising: a single-side power unit heat radiation member (110a) fixed to the heat radiation member fixing surface (16) of one (160a) of the two power modules (160a, 160b); and an other side power unit heat radiation member (110b) fixed to the heat radiation member fixing surface (16) of the other (160b) of the two power modules (160a, 160b), wherein the one-side power unit heat radiation member (110a) and the other side Unit power heat radiating members (110b) are arranged in such a manner as to be spaced from each other in the circumferential direction (X) and the circumferential direction distance therebetween on the radially outer side (Y2) is greater than that on the radially inner side (Y1). Electric lathe (100) according to Claim 14 , further comprising a housing (102) which covers the other axial direction side (Z1) of the control circuit (170), the housing (102) having a plate-shaped housing main body (102a) extending in the radial direction (Y) and in the circumferential direction (X ), and two plate-shaped case projection walls (102f1, 102f2) protruding from the case main body (102a) to the other axial direction side (Z1) in a circumferential direction space between the one-side power unit heat radiation member (110a) and the other-side power unit heat radiation member (110b), and extending in the radial direction (Y), wherein in a circumferential direction distance between the one-side power unit heat radiating member (110a) and the other-side power unit heat radiating member (110b), the two inside case protruding walls (102f1, 102f2) in such a manner are arranged to be spaced from each other in the circumferential direction (X), and in such he manner that they shift to the radial outside (Y2), and wherein inside case flow paths (185), each of which is a flow path through which a coolant flows in the radial direction (Y), in a circumferential direction space between the single-side power unit -Heat radiation member (110a) and the inside case protrusion wall (102f1) on one circumferential direction side (XI), in a circumferential space between the inside case protrusion wall (102f1) on the one circumferential direction side (X1) and the inside case protrusion wall (102f2) on the other circumferential direction side (X2), and are formed in a circumferential direction space between the inside case protrusion wall (102f2) on the other circumferential direction side (X2) and the other side power unit heat radiation member (110b). Electric lathe (100) according to one of the Claims 14 and 15th , where the Power fixing member (113), a plate-shaped fixing member main body (113a) extending in the radial direction (Y) and in the circumferential direction (X), and two plate-shaped inside fixing member protruding walls (113f1, 113f2) extending from the fixing member main body ( 113a) project to the other axial direction side (Z1) in a circumferential direction space between the one-side power unit heat radiation member (110a) and the other-side power unit heat radiation member (110b), and which extend in the radial direction (Y), being at a circumferential directional distance between the one-side power unit heat radiation member (110a) and the other-side power unit heat radiation member (110b), the two inside fixing member protrusion walls (113f1, 113f2) are arranged in such a manner as to be spaced from each other in the circumferential direction (X), and in such a way that they shift to the radial outside (Y2), and wove an inside fixing member flow paths (186) each of which is a flow path through which a coolant flows in the radial direction (Y) in the circumferential direction space between the single side power unit heat radiating member (110a) and the inside fixing member protrusion wall (113f1 ) on a circumferential direction side (XI), in a circumferential direction space between the inside fixing member protruding wall (113f1) on the circumferential direction side (XI), and the inside fixing member protruding wall (113f2) on the other circumferential direction side (X2), and in a circumferential direction space are formed between the inside fixing member protruding wall (113f2) on the other circumferential direction side (X2) and the other side power unit heat radiation member (110b). Electric lathe (100) according to one of the Claims 14 and 15th , further comprising a condenser module (116) in which a smoothing condenser (115) to be connected to the power module (160) is provided, with a circumferential distance between the one-side power unit heat radiation member (110a) and the other-side power unit -Heat radiation component (110b), the capacitor module (116) is arranged in such a way that it shifts to the radial outside (Y2).

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