JP2013223299A - Apparatus and method for manufacturing electric motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide apparatus and method for manufacturing an electric motor which are capable of improving producibility.SOLUTION: A manufacturing apparatus 41 for an electric motor 1 includes: a phase forming machine 42 that has an engaging member 54 circumferentially engaged with a key groove 24 of a rotating shaft 21, and adjusts a rotating angle of a rotor 4 disposed radially opposite a stator 3 to a predetermined angle; and a fit-up machine for fitting a resolver rotor to the rotor 4 set at the predetermined angle. The manufacturing apparatus 41 further includes a short-circuit member 46 for causing a short circuit between connection ends 17a of individual coils 17.

Description

  The present invention relates to an electric motor manufacturing apparatus and an electric motor manufacturing method.

  2. Description of the Related Art Conventionally, electric motors that are configured as brushless motors that include a stator having a coil wound around teeth of a stator core and a rotor having permanent magnets are widely known. Such an electric motor is usually provided with an angle sensor for detecting the rotation angle of the rotor, and there is one in which a resolver is used as this angle sensor (for example, Patent Document 1).

  Such a resolver includes a resolver rotor that is fixed to a rotation shaft of the rotor so as to be integrally rotatable, and a resolver stator that is disposed on the outer periphery of the resolver rotor. ) Is fixed to the rotating shaft. Specifically, a reference phase portion made of, for example, a key groove is formed on the rotating shaft, and the permanent magnet and the resolver rotor are fixed to the rotating shaft so as to have a predetermined phase with respect to the reference phase portion, respectively. Thus, the relative phases of the permanent magnet and the resolver rotor are matched. Patent Document 1 discloses a method for assembling a resolver rotor, in which a rotor is rotatably arranged in a stator and then a resolver rotor is assembled to a rotation shaft of the rotor.

JP 2003-113909 A

  By the way, when automating the manufacture of the electric motor in which the resolver rotor is assembled after the rotor is arranged in the stator as in Patent Document 1, first, the engaging member of the phase shifter is engaged with the reference phase portion of the rotating shaft. The rotation angle of the rotor disposed in the stator is adjusted to a predetermined angle. Then, the resolver rotor held at a predetermined phase with respect to the reference phase portion of the rotating shaft at a predetermined angle is assembled to the rotating shaft by the assembling machine.

  However, since the rotor is rotatably supported with respect to the stator, there is a problem that when the external force is applied, the rotor is easily rotated and the manufacturing efficiency of the electric motor is reduced. Specifically, for example, until the engaging member of the phase shifter is engaged with the keyway, the rotor rotates with the engaging member contacting the rotor, and the rotation angle of the rotor is set to a predetermined angle. There is a risk that it will take a lot of time to meet the requirements. Further, for example, when the electric motor is moved from the phase shifter to the assembly machine, the rotation angle of the rotor adjusted to a predetermined angle is shifted, so that the phase of the rotation axis in the assembly machine is relative to the reference phase portion (permanent magnet) of the rotation shaft. Therefore, the resolver rotor cannot be assembled together, and it may be necessary to adjust the rotation angle of the rotor again.

  The above-described problems are not limited to the case of assembling the resolver rotor, but may occur in the same manner when assembling other phase members that need to match the phase of the rotation shaft with respect to the reference phase portion.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electric motor manufacturing apparatus and an electric motor manufacturing method capable of improving manufacturing efficiency.

  To achieve the above object, the invention according to claim 1 comprises a stator having a plurality of coils wound around teeth of a stator core, and a rotor having a permanent magnet and facing the stator in the radial direction, An engagement member that engages with the reference phase portion in the circumferential direction in the electric motor manufacturing apparatus in which the phase member is fixed to the rotor so that the phase with respect to the reference phase portion formed on the rotor is a predetermined phase. A phase shifter that adjusts the rotation angle of the rotor in a state of being opposed to the stator in the radial direction to a predetermined angle; and an assembly machine that assembles the phase member to the rotor at the predetermined angle; And a short-circuit member that short-circuits the connection ends of the coils.

  When the rotor rotates, an induced voltage (back electromotive voltage) is generated in each coil by electromagnetic induction. Therefore, when the connection ends of the coils are short-circuited by the short-circuit member as in the above configuration, an induced current based on the induced voltage flows through the coil when the rotor tries to rotate, and the magnetic flux generated by the induced current and the permanent The rotation of the rotor is regulated by the interaction with the magnetic flux of the magnet. As a result, the rotation of the rotor is suppressed when an external force is applied, so that the manufacturing efficiency of the electric motor can be improved.

  The invention according to claim 2 is the electric motor manufacturing apparatus according to claim 1, wherein the short-circuit member is a short-circuit state in which the connection ends of the coils are short-circuited, and the connection ends are opened. The gist is provided with a control device configured to switch between the opened state and the state of the short-circuit member.

According to the said structure, according to the state of the electric motor before attaching a phase member, a short circuit state and an open state can be automatically switched by a control apparatus.
According to a third aspect of the present invention, in the electric motor manufacturing apparatus according to the second aspect, the control device short-circuits the connection ends of the coils after adjusting the rotation angle of the rotor to a predetermined angle. This is the gist.

According to the said structure, it can suppress that the rotor which matched the rotation angle to the predetermined angle before moving an electric motor from a phase shifter to an assembly | attachment machine, for example.
According to a fourth aspect of the present invention, in the electric motor manufacturing apparatus according to the second or third aspect of the invention, the control device is configured such that each of the coils before the engagement member is engaged with the reference phase portion in the circumferential direction. The gist is to short-circuit the connection end portions of each other.

According to the said structure, before engaging an engaging member with the reference | standard phase part in the circumferential direction, it can suppress that an engaging member contacts a rotor and this rotor follows.
According to a fifth aspect of the present invention, in the electric motor manufacturing apparatus according to the fourth aspect, the control device connects the coils after the engaging portion is engaged with the reference phase portion in the circumferential direction. The gist is to open the ends.

  According to the above configuration, when the rotation angle of the rotor is adjusted to a predetermined angle, it is possible to prevent an induced current from flowing through the coil, and it is possible to easily rotate the rotor and adjust the rotation angle to the predetermined angle.

  According to a sixth aspect of the present invention, in the electric motor manufacturing apparatus according to any one of the first to fifth aspects, the predetermined angle has a maximum cogging torque generated between the stator core and the permanent magnet. The gist of the rotation angle is as follows.

  The magnetic resistance in the magnetic path of the permanent magnet is caused by the shape of the teeth formed on the stator core and changes according to the rotation angle of the rotor. The magnetic attractive force acting between the permanent magnet and the stator core is maximized at the rotation angle at which the magnetic resistance is minimized, and the cogging torque is maximized. In other words, the rotor is less likely to rotate in a state where the cogging torque is maximized than in other rotational angles. Therefore, the rotation of the rotor by an external force can be further suppressed by setting the predetermined angle to the rotation angle at which the cogging torque is maximum as in the above configuration.

  The invention according to claim 7 includes a stator having a plurality of coils wound around the teeth of the stator core, and a rotor having a permanent magnet and facing the stator in the radial direction. In the method of manufacturing an electric motor in which the phase member is fixed so that the phase with respect to the reference phase portion formed on the stator is a predetermined phase, the engaging member is engaged with the reference phase portion in the circumferential direction, and the stator and the radial direction A phase setting step for adjusting a rotation angle of the rotor facing the rotor to a predetermined angle, and an assembly step for mounting the phase member to the rotor at the predetermined angle, The gisting step is to short-circuit the connection ends of the coils after adjusting the rotation angle of the rotor to a predetermined angle. According to the said structure, there can exist an effect similar to Claim 3.

  According to an eighth aspect of the present invention, in the method for manufacturing an electric motor according to the seventh aspect, in the phasing step, before the engagement member is engaged with the reference phase portion in the circumferential direction, The gist is to short-circuit the connection ends.

  The invention according to claim 9 includes a stator having a plurality of coils wound around the teeth of the stator core, and a rotor having a permanent magnet and facing the stator in the radial direction. In the method of manufacturing an electric motor in which the phase member is fixed so that the phase with respect to the reference phase portion formed on the stator is a predetermined phase, the engaging member is engaged with the reference phase portion in the circumferential direction, and the stator and the radial direction A phase setting step for adjusting a rotation angle of the rotor facing the rotor to a predetermined angle, and an assembly step for mounting the phase member to the rotor at the predetermined angle, The gist of the step is to short-circuit the connection ends of the coils before engaging the engaging member with the reference phase portion in the circumferential direction. According to said each structure, there can exist an effect similar to Claim 4.

  According to a tenth aspect of the present invention, in the method of manufacturing an electric motor according to the eighth or ninth aspect, in the phasing step, the engaging portion is engaged with the reference phase portion in the circumferential direction, and then The gist is to open the connection ends of the coils. According to the said structure, there can exist an effect similar to Claim 5.

  According to the present invention, it is possible to provide an electric motor manufacturing apparatus and an electric motor manufacturing method capable of improving manufacturing efficiency.

Sectional drawing along the axial direction of an electric motor. Sectional drawing orthogonal to the axial direction of an electric motor (AA sectional drawing of FIG. 1). Sectional drawing orthogonal to the axial direction of a resolver rotor (BB sectional drawing of FIG. 1). The schematic block diagram of the periphery of the phase shifter in a manufacturing apparatus. The schematic block diagram of the assembly machine periphery in a manufacturing apparatus. The graph which shows the relationship between the rotation angle of a rotor, and cogging torque. The flowchart which shows the assembly procedure of a resolver rotor.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the electric motor (rotating electric machine) 1 is supported rotatably in a cylindrical housing 2, a stator 3 accommodated in the housing 2, and a radial inner side of the stator 3. The brushless motor is provided with a rotor 4.

  More specifically, the housing 2 includes a bottomed cylindrical housing main body 11 that is open on one end side, and an annular cover member 12 that is provided so as to close the open end of the housing main body 11.

  The stator 3 has an annular portion 13 fixed to the inner periphery of the cylindrical portion 11a in the housing body 11 and a plurality of teeth (in this embodiment, 12 teeth) extending radially inward from the annular portion 13. A stator core 15 composed of 14 is provided. The stator 3 includes a coil 17 wound around each tooth 14 via an insulator 16. The connection end portion 17 a of the coil 17 is connected to a plurality of bus bars 18 protruding to the outside of the cover member 12.

  On the other hand, the rotor 4 has a cylindrical rotor core 22 that is externally fitted to the rotary shaft 21 and rotates integrally with the rotary shaft 21, and a plurality (ten in this embodiment) of permanent magnets fixed to the outer periphery of the rotor core 22. 23. A key groove 24 opened to the shaft end surface 21b is formed in one end portion (upper end portion in FIG. 1) 21a of the rotating shaft 21. The permanent magnet 23 is fixed to the rotor core 22 so that the phase (circumferential position) with respect to the key groove 24 is a predetermined phase. That is, in the present embodiment, the key groove 24 corresponds to the reference phase portion. In addition, each permanent magnet 23 of this embodiment is formed in the rectangular plate shape, and is arrange | positioned so that a different polarity (N pole, S pole) may be located in a line by turns in the circumferential direction. The rotor 4 is rotatably supported on the inner periphery of the stator 3 by bearings 25 a and 25 b provided on the bottom 11 b of the housing body 11 and the cover member 12.

  A resolver 31 that detects the rotation angle of the rotor 4 is disposed coaxially with the rotor core 22 at one end side of the rotating shaft 21. The resolver 31 includes a resolver rotor 32 that is fixed to the rotary shaft 21 so as to be integrally rotatable, and an annular resolver stator 33 that is disposed on the outer periphery of the resolver rotor 32. The resolver rotor 32 is fixed to the rotary shaft 21 in a state where the phase with respect to the key groove 24, that is, the phase with respect to the permanent magnet 23 is matched. That is, in this embodiment, the resolver rotor 32 corresponds to a phase member.

  Specifically, the resolver stator 33 includes a resolver core 34 formed by laminating a plurality of magnetic steel plates, and a resolver coil 36 wound around the resolver core 34 via an insulator 35, and is formed on the cover member 12. It is fixed in a hole-shaped accommodating portion 37. On the other hand, as shown in FIG. 3, the resolver rotor 32 is formed by laminating a plurality of magnetic steel plates, and the outer peripheral surface has a gap permeance with the inner periphery of the resolver stator 33 in accordance with the rotation angle of the resolver rotor 32. It is formed in a shape that changes. A key 38 that protrudes inward in the radial direction is formed on the inner peripheral surface of the resolver rotor 32. The resolver rotor 32 is adapted to be in phase with the rotary shaft 21 by fitting the key 38 into the key groove 24, and is fixed to the rotary shaft 21 by press-fitting. Thereby, the relative phase with the permanent magnet 23 of the resolver rotor 32 is matched.

  In the electric motor 1 configured as described above, three-phase (U, V, W) driving power corresponding to the rotation angle of the rotor 4 detected by the resolver 31 is supplied to each coil 17, so that a rotating magnetic field is generated. The rotor 4 is configured to rotate based on the relationship between the rotating magnetic field and the magnetic flux of each permanent magnet 23.

Next, the manufacture of the electric motor (assembly of the resolver rotor) will be described.
In the electric motor 1, a stator 3 in which a coil 17 is wound around each tooth 14 is fixed in a housing body 11, and a rotor 4 in which a rotor core 22 and a permanent magnet 23 are fixed to a rotating shaft 21 is rotatable in the stator 3. It is manufactured by assembling the resolver 31 with the cover member 12 being fixed while being disposed.

  As shown in FIGS. 4 and 5, the manufacturing apparatus 41 for assembling the resolver rotor 32 to the rotating shaft 21 includes a phase shifter 42 (see FIG. 4) for rotating the rotor 4 and an assembly for assembling the resolver rotor 32 to the rotating shaft 21. Attached machine 43 (see FIG. 5). Further, the manufacturing apparatus 41 is configured to be movable on the base 44 and supports each electric motor 1 before the resolver 31 is assembled, and each of the electric motors 1 conveyed by the conveyance table 45. A short-circuit member 46 that short-circuits the connection end portions 17a of the coil 17 is provided. And the control apparatus 47 of the manufacturing apparatus 41 controls the said phase shifter 42, the assembly machine 43, the conveyance stand 45, and the short circuit member 46, and is sequentially conveyed below the phase shifter 42 and the assembly machine 43. A resolver rotor 32 is assembled to the electric motor 1.

  More specifically, as shown in FIG. 4, the phase shifter 42 includes a phase shift head 51 disposed above the base 44. The phase shift head 51 is configured to be rotatable on the same axis as the rotation shaft 21 and movable in the vertical direction (direction in contact with and away from the base 44) by a drive unit 52 using a motor or the like as a drive source. A housing hole 53 that opens downward is formed in the phase adjusting head 51. A rod-like engaging member 54 that engages with the key groove 24 of the rotating shaft 21 and an engaging member 54 are formed in the housing hole 53. An urging member 55 such as a coil spring is urged downward. Further, the phase adjusting head 51 detects the position of the engaging member 54 and determines whether or not the engaging member 54 is received in the receiving hole 53 (for example, a photoelectric sensor). Is provided.

  The short-circuit member 46 is configured to be switchable between a short-circuit state in which the connection end portions 17 a of the coils 17 are short-circuited via the bus bar 18 and an open state in which the connection end portions 17 a are open. Specifically, the short-circuit member 46 includes a box-shaped main body 61 in which a plurality of insertion holes 61a into which the bus bar 18 is inserted are formed. The main body 61 is provided with a rod-like slide member 62 made of a conductive material so as to be reciprocable along the arrangement direction of the insertion holes 61a, and a drive portion 63 such as an air cylinder for driving the slide member 62 is provided. Yes. The slide member 62 is formed with a plurality of contact portions 64 that can be projected and retracted in the respective insertion holes 61a in accordance with the reciprocation thereof. Each bus bar 18 is short-circuited when the slide member 62 moves in one direction while being inserted into the insertion hole 61a, and is opened when the slide member 62 moves in the other direction. That is, the connection end portion 17 a of each coil 17 is switched between a short-circuit state and an open state depending on the position of the slide member 62. The short-circuit member 46 is attached to each electric motor 1 before being transported to the phase shifter 42 by the transport base 45, and is removed after the resolver rotor 32 is assembled by the assembly machine 43.

  The drive units 52 and 63 and the position sensor 56 are connected to the control device 47. When the conveyance table 45 holding the electric motor 1 is disposed below the phase shifter 42, the control device 47 controls the drive unit 52 to move the phase shift head 51 downward and compress the urging member 55. In this state, the engaging member 54 is brought into contact with the shaft end surface 21 b of the rotating shaft 21, and then the phase adjusting head 51 is rotated to engage the engaging member 54 with the key groove 24. The control device 47 assumes that the engaging member 54 is engaged with the key groove 24 when the engaging member 54 is not accommodated in the accommodating hole 53 with the phase shift head 51 moved downward. to decide. Then, the control device 47 rotates the phase adjusting head 51 so that the rotation angle of the rotor 4 (rotating shaft 21) disposed in the stator 3 is set to a predetermined angle so that the key groove 24 moves to a predetermined circumferential position. Match. Here, the predetermined angle of the present embodiment is set to one of the rotation angles at which the cogging torque is maximized. In the electric motor 1, the cogging torque generated between the stator core 15 and the permanent magnet 23 changes according to the rotation of the rotor 4 as shown in FIG.

  Further, the control device 47 controls the drive unit 63 to short-circuit the connection end portions 17a of the coils 17 before engaging the engaging member 54 of the phase shifter 42 with the key groove 24, thereby engaging the control unit 47. After the member 54 is engaged with the key groove 24, the connection end portions 17a are opened. Furthermore, the control device 47 controls the drive units 52 and 63 to short-circuit the connection end portions 17a of the coils 17 after adjusting the rotation angle of the rotor 4 to a predetermined angle.

  As shown in FIG. 5, the assembling machine 43 includes an assembling head 71 disposed above the base 44 and a receiving portion 72 provided so as to be able to appear and retract in the base 44 at a position facing the assembling head 71. doing. The assembly head 71 is configured to be movable in the vertical direction on the same axis as the rotary shaft 21 by a drive unit 73 using a motor or the like as a drive source. The assembly head 71 holds the resolver rotor 32 in such a phase that the key 38 is engaged with the key groove 24 of the rotor 4 at a predetermined angle. Note that the resolver rotor 32 held in the same phase is sequentially supplied to the assembling head 71. And if the conveyance stand 45 holding the electric motor 1 is arrange | positioned under the assembly | attachment machine 43, the control apparatus 47 will move the assembly head 71 below while controlling the drive part 73, and will also receive a receiving part. 72 is protruded from the base 44, and the resolver rotor 32 is press-fitted and fixed to one end 21 a of the rotating shaft 21.

Next, the procedure for assembling the resolver rotor will be described with reference to the flowchart shown in FIG.
The control device 47 controls the phase shifter 42 to adjust the rotation angle of the rotor 4 to a predetermined angle when the carriage 45 on which the electric motor 1 is supported is disposed below the phase shifter 42. (Step S1). In the phase setting step S1, the control device 47 first moves the slide member 62 of the short-circuit member 46 in one direction to short-circuit the connection end portions 17a of the coils 17 (step S1-1). Subsequently, the control device 47 engages the engagement member 54 with the key groove 24 of the rotating shaft 21 (step S1-2), and then moves the slide member 62 of the short-circuit member 46 in the other direction to cause each coil 17 to move. The connection end portions 17a are opened (step S1-3). Subsequently, after the rotor 4 is rotated so that the rotation angle of the rotor 4 becomes a predetermined angle (step S1-4), the slide member 62 of the short-circuit member 46 is moved again in one direction to connect the connection end of each coil 17. The parts 17a are short-circuited (step S1-5).

  And if the conveyance stand 45 with which the electric motor 1 was supported is arrange | positioned under the assembly | attachment machine 43, the control apparatus 47 will perform the assembly | attachment step which assembles | attaches the resolver rotor 32 with respect to the rotor 4 in a predetermined angle ( Step S2). Then, the electric motor 1 is manufactured by assembling the resolver stator 33 to the cover member 12.

Next, the operation of the electric motor manufacturing apparatus of this embodiment will be described.
When the rotor 4 rotates, an induced voltage (counterelectromotive voltage) is generated in each coil 17 by electromagnetic induction. Therefore, when the connection end portions 17a of the coils 17 are short-circuited by the short-circuit member 46 as described above, the rotor When 4 is going to rotate, an induced current based on the induced voltage flows through the coil 17. The rotation of the rotor 4 is regulated (braking) by the interaction between the magnetic flux generated by the induced current and the magnetic flux of the permanent magnet 23.

  Here, in this embodiment, since the connection end portions 17a of the coils 17 are short-circuited before the engaging member 54 of the phase shifter 42 is engaged with the key groove 24, the engaging member 54 is connected to the key groove 24. Even when the engaging member 54 is urged by the urging member 55 and is in contact with the rotary shaft 21 until the engaging member 54 is engaged with the rotor 4, the rotation of the rotor 4 is suppressed. Further, since the connection end portions 17a are opened after the engagement member 54 is engaged with the key groove 24, the induction current is prevented from flowing through the coil 17 when the rotation angle of the rotor 4 is set to a predetermined angle. The rotation of the rotor 4 is not hindered. Since the connection end portions 17a of the coils 17 are short-circuited after the rotation angle of the rotor 4 is adjusted to a predetermined angle, the operation is performed until the electric motor 1 is moved from the phase shifter 42 to the assembly machine 43. The rotation of the rotor 4 whose rotation angle is adjusted to a predetermined angle is suppressed by the external force.

As described above, according to the present embodiment, the following operational effects can be achieved.
(1) The connection end portions 17a of the coils 17 are short-circuited by the short-circuit member 46 until the engaging member 54 of the phase shifter 42 is engaged with the key groove 24 or the electric motor 1 is phased. It is possible to prevent the rotor 4 from being rotated by an external force that acts during the period from the time 42 is moved to the assembling machine 43. Further, after engaging the engagement member 54 with the key groove 24 in the circumferential direction, the connection end portions 17a of the coils 17 are opened, so that the rotor 4 can be easily rotated and the rotation angle thereof is set to a predetermined angle. Can be matched. Thereby, the manufacturing efficiency of the electric motor 1 can be improved. And in this embodiment, in order to short-circuit the connection end parts 17a of the coil 17, unlike the case where the rotation axis | shaft 21 is directly gripped and the rotation of the rotor 4 is suppressed, for example, the phase shifter 42 and the assembly machine 43 It is possible to prevent the operation from being hindered.

  (2) Since the short-circuit member 46 is configured to be switchable between a short-circuit state in which the connection end portions 17a of the coils 17 are short-circuited and an open state in which the connection end portions 17a are open-circuited, before the resolver rotor 32 is assembled. Depending on the state of the electric motor 1, the control device 47 can automatically switch between the short-circuit state and the open state.

(3) The predetermined angle, which is the rotation angle of the rotor 4 adjusted by the phase shifter 42, is set to the rotation angle at which the cogging torque generated between the stator core 15 and the permanent magnet 23 is maximized.
The magnetic resistance in the magnetic path of the permanent magnet 23 varies depending on the rotation angle of the rotor 4 due to the shape of the teeth 14 formed on the stator core 15. The magnetic attractive force acting between the permanent magnet 23 and the stator core 15 is maximized at the rotation angle at which the magnetic resistance is minimized, and the cogging torque is maximized. In other words, the rotor 4 is less likely to rotate in a state where the cogging torque is at the maximum rotation angle than in other rotation angles. Therefore, the rotation of the rotor 4 by an external force can be further suppressed by setting the predetermined angle to the rotation angle at which the cogging torque is maximized.

In addition, the said embodiment can also be implemented in the following aspects which changed this suitably.
In the above embodiment, the predetermined angle may be set to a rotation angle other than the rotation angle at which the cogging torque is maximum.

  In the above embodiment, the bus bar 18 is short-circuited or opened by moving the slide member 62 by the driving unit 63. However, the present invention is not limited to this. For example, a conductor wire that is partially exposed in each insertion hole 61a is embedded in the short-circuit member 46, and adjacent conductor wires are connected to each other such as an FET (field effect transistor). The bus bar 18 may be short-circuited or opened by connecting via a switch and controlling on / off of the switch.

  In the above embodiment, the short-circuit member 46 can be switched between the short-circuit state and the open-state without attaching / detaching the short-circuit member 46 to / from the bus bar 18. Otherwise, the short circuit state and the open state may not be switched.

  In the above embodiment, the connection ends 17a of the coils 17 are short-circuited both before the engagement member 54 is engaged with the key groove 24 and after the rotation angle of the rotor 4 is adjusted to a predetermined angle. However, the present invention is not limited to this, and short-circuiting may be performed only before engaging member 54 is engaged with key groove 24 or only after the rotation angle of the rotor is adjusted to a predetermined angle.

  In the above embodiment, the rotation angle of the rotor 4 is adjusted to a predetermined angle after the connection ends 17a of the coils 17 are opened, but the rotation angle of the rotor 4 may be adjusted to a predetermined angle while being short-circuited. .

In the above embodiment, the key 38 may not be formed on the inner peripheral surface of the resolver rotor 32.
In the above embodiment, the key groove 24 is formed on the rotating shaft 21 as a reference phase portion. However, the present invention is not limited to this, and a protrusion such as a key may be used as the reference phase portion. In this case, it is desirable to form a key groove in the resolver rotor 32. In addition, the reference phase portion may not be formed on the rotating shaft 21, and the reference phase portion may be formed on the rotor core, for example.

  In the above embodiment, the present invention is applied when the resolver rotor 32 is assembled. However, the present invention is not limited thereto, and is applied when assembling other phase members that are fixed in phase with the rotor 4 (rotating shaft 21). May be.

  In the above embodiment, the present invention is applied to the inner rotor type electric motor manufacturing method in which the rotor 4 is disposed on the radially inner side of the stator 3, but the outer rotor type in which the rotor 4 is disposed on the radially outer side of the stator 3. You may apply to the manufacturing method of this electric motor.

  DESCRIPTION OF SYMBOLS 1 ... Electric motor, 3 ... Stator, 4 ... Rotor, 14 ... Teeth, 15 ... Stator core, 17 ... Coil, 17a ... Connection end part, 23 ... Permanent magnet, 24 ... Key groove, 31 ... Resolver, 32 ... Resolver rotor, 33 ... Resolver stator, 37 ... Key, 41 ... Manufacturing device, 42 ... Phase shifter, 43 ... Assembly machine, 46 ... Short-circuit member, 47 ... Control device, 54 ... Engagement member.

Claims (10)

A stator having a plurality of coils wound around teeth of a stator core, and a rotor having a permanent magnet and radially opposed to the stator, the rotor having a phase relative to a reference phase portion formed on the rotor In the electric motor manufacturing apparatus in which the phase member is fixed so that is in a predetermined phase,
A phase shifter that has an engagement member that engages with the reference phase portion in the circumferential direction, and adjusts the rotation angle of the rotor in a state of being opposed to the stator in the radial direction to a predetermined angle;
An assembly machine for assembling the phase member to the rotor at the predetermined angle,
An apparatus for manufacturing an electric motor, comprising: a short-circuit member for short-circuiting connection ends of the coils. In the electric motor manufacturing apparatus according to claim 1,
The short-circuit member is configured to be switchable between a short-circuit state in which the connection ends of the coils are short-circuited and an open state in which the connection ends are open,
An apparatus for manufacturing an electric motor, comprising a control device for controlling the state of the short-circuit member. In the electric motor manufacturing apparatus according to claim 2,
The said control apparatus short-circuits the connection ends of each said coil, after adjusting the rotation angle of the said rotor to a predetermined angle, The manufacturing apparatus of the electric motor characterized by the above-mentioned. In the electric motor manufacturing apparatus according to claim 2 or 3,
The said control apparatus is a manufacturing apparatus of the electric motor characterized by short-circuiting the connection end parts of each said coil before engaging the said engagement member with the said reference | standard phase part in the circumferential direction. In the electric motor manufacturing apparatus according to claim 4,
The said control apparatus is a manufacturing apparatus of the electric motor characterized by opening the connection end parts of each said coil after engaging the said engaging part with the said reference | standard phase part in the circumferential direction. In the electric motor manufacturing apparatus according to any one of claims 1 to 5,
The electric motor manufacturing apparatus according to claim 1, wherein the predetermined angle is a rotation angle at which a cogging torque generated between the stator core and the permanent magnet is maximized. A stator having a plurality of coils wound around teeth of a stator core, and a rotor having a permanent magnet and radially opposed to the stator, the rotor having a phase relative to a reference phase portion formed on the rotor In the method of manufacturing an electric motor in which the phase member is fixed so that the phase becomes a predetermined phase,
A phase out step of engaging an engagement member with the reference phase portion in a circumferential direction, and adjusting a rotation angle of the rotor in a state of being opposed to the stator in a radial direction to a predetermined angle;
An assembly step of assembling the phase member to the rotor at the predetermined angle,
In the phase setting step, the connecting end portions of the coils are short-circuited after the rotation angle of the rotor is adjusted to a predetermined angle. In the manufacturing method of the electric motor of Claim 7,
In the phasing step, the connecting end portions of the coils are short-circuited before the engaging member is engaged with the reference phase portion in the circumferential direction. A stator having a plurality of coils wound around teeth of a stator core, and a rotor having a permanent magnet and radially opposed to the stator, the rotor having a phase relative to a reference phase portion formed on the rotor In the method of manufacturing an electric motor in which the phase member is fixed so that the phase becomes a predetermined phase,
A phase out step of engaging an engagement member with the reference phase portion in a circumferential direction, and adjusting a rotation angle of the rotor in a state of being opposed to the stator in a radial direction to a predetermined angle;
An assembly step of assembling the phase member to the rotor at the predetermined angle,
In the phasing step, the connecting end portions of the coils are short-circuited before the engaging member is engaged with the reference phase portion in the circumferential direction. In the manufacturing method of the electric motor of Claim 8 or 9,
In the phase setting step, the connecting end portions of the coils are opened after the engaging portion is engaged with the reference phase portion in the circumferential direction.