JP5922421B2 - Rotating electrical machine manufacturing method and adjustment jig - Google Patents

Description

  Embodiments described herein relate generally to a method of manufacturing a rotating electrical machine and an adjustment jig.

  A resolver is known as a sensor that detects a rotation angle of a rotor. The resolver includes a resolver stator that is fixedly attached to the casing of the rotating electrical machine, and a resolver rotor that rotates together with the rotor. In order to accurately detect the rotation angle of the rotor, it is necessary to accurately align the reference position of the resolver stator and attach it to the rotating electrical machine. This is because if the reference position of the resolver stator is deviated, an error occurs in position detection.

  The resolver stator must be attached to each rotating electric machine. Therefore, it is necessary to adjust the reference position of the resolver stator for each product, but the parameter of this reference position may be stored in the storage means and controlled by software using this parameter.

  When such a software adjustment method is employed, the parameters of the inverter that performs software control and the rotating electrical machine must be managed in a one-to-one relationship. Then, whenever it is necessary to change the combination of these inverters and rotating electrical machines, the software parameters must be checked and adjusted.

  Further, there is a method in which two phases of a three-phase synchronous motor are short-circuited, a direct current is supplied to the remaining one phase to rotate the rotor, and the resolver stator is fixed with the stop position as a reference position. Further, when adjusting the reference position of the resolver, a direct current is applied to a phase coil of a phase of the motor coil to stop the rotor at a position where the resolver detection angle should be 0 degree. There is a method of measuring and adjusting the detection angle of the resolver.

  When these methods are employed, it may be necessary to disconnect the rotating electrical machine from the load of the rotating electrical machine. In this case, since a short-circuit operation and a connection operation of a direct current generation circuit are required, a specialized place and device are required. For example, when applied to an in-vehicle device, position adjustment becomes difficult.

  In addition, when the above method is adopted, a direct current is required, and when the rotor is stopped, a relative positional shift for each product occurs due to the influence of friction or the like. In addition, it takes a considerable amount of time for the adjustment work.

JP 2001-128484 A JP 2007-101301 A

  Provided are a rotating electrical machine manufacturing method and an adjustment jig capable of adjusting a reference position of a resolver stator mechanically with high accuracy and reducing work time.

The manufacturing method of the rotary electric machine of one Embodiment is equipped with the following process. And a step of causing a display to display a differential voltage waveform of two phase-induced voltages of the stator coil using a Z-phase pulse signal output every time the reference point of the resolver rotor passes the reference position as a trigger signal. Adjust the resolver stator mounting angle via a jig so as to shorten the time interval between the zero-cross point of the differential voltage waveform displayed on the display and the pulse generation timing of the Z-phase pulse signal. The process of attaching is provided.

Longitudinal side view showing the configuration of the rotating electrical machine of one embodiment The front view which shows the structure of the resolver of one Embodiment Sectional drawing which shows the relative positional relationship of a resolver stator and a resolver rotor in one Embodiment (sectional drawing shown along the III-III line of FIG. 1) Sectional drawing which shows the structure of a stator core and a rotor in one Embodiment (sectional drawing shown along the IV-IV line of FIG. 1) Explanatory drawing which shows roughly the drive system at the time of the reference position adjustment of one Embodiment Explanatory drawing which shows roughly the measurement system at the time of the reference position adjustment of one Embodiment The flowchart which shows the flow of the reference position adjustment of one Embodiment The front view which shows the structure of the jig for adjustment of one Embodiment The side view which shows the structure of the jig for adjustment of one Embodiment Front view when an adjustment jig is attached in one embodiment Vertical side view when adjusting jig is attached in one embodiment (vertical side view shown along line XI-XI in FIG. 10) Cross-sectional view of the main part when the adjustment jig is attached in one embodiment (cross-sectional view showing a state where the fitting part is fitted in the groove: cross-sectional view taken along line XII-XII in FIG. 10) A voltage waveform representing a temporal relative relationship between each voltage (induced voltage of each phase, induced voltage between phases, differential voltage) and a Z-phase pulse signal according to an embodiment. Actual voltage waveform of each phase voltage of one embodiment Voltage waveform example during adjustment of one embodiment ((A) before adjustment, (B) after adjustment) Relationship diagram of driving conditions, target accuracy, and target adjustment value during testing of rotating electrical machine of one embodiment

Hereinafter, the manufacturing method of the rotary electric machine of one Embodiment is demonstrated, referring FIGS.
FIG. 1 shows a longitudinal side view of a rotating electrical machine. The rotating electrical machine 1 is a three-phase synchronous motor. The rotating electrical machine 1 includes a housing (rotary electrical machine main body) 2, a stator (stator) 3, a rotor (rotor) 4, bearings 5a and 5b, a shaft 6, and the like.

  Hereinafter, the left direction in FIG. 1 will be described as a front surface (front surface) and the right direction as a rear surface. The main body 7 of the housing 2 has a cylindrical shape extending in the left-right direction in FIG. The main body portion 7 is formed with a fixed piece portion 8 that protrudes inward in the vicinity of the center of the cylindrical shape. The lid 9 on the rear surface side is mounted so as to close the opening on the rear surface side of the main body portion 7. The stator 3 is disposed on the inner periphery of the housing surrounded by the lid portion 9, the fixed piece portion 8, and the main body portion 7.

  The stator 3 includes, for example, a stator core 10 formed in a short cylindrical shape in which a large number of silicon steel plates are stacked, and a stator coil 11 inserted into a coil insertion hole of the stator core 10. Although not shown, the electric wire drawn from the stator coil 11 is drawn to the terminal block through the main body 7 and connected to a connection cable (not shown). This connection cable line is only a phase terminal of U phase, V phase, and W phase. The driving power of the rotating electrical machine 1 is input through this connection cable. A rotor 4 is disposed on the inner peripheral side of the stator 3. The rotor 4 is rotatable about the axis of the shaft 6. The shaft 6 extends in the left-right direction (front-rear direction) in FIG.

  A bearing 5 a is fixed to the inner end of the fixed piece 8 of the main body 7, and a bearing 5 b is also fixed to the inner end of the lid 9 on the rear surface side. A part of the front side (front side) (left side in FIG. 1) of the shaft 6 is rotatably supported by the fixed piece 8 via a bearing 5a, and a part on the rear side (right side in FIG. 1) is a bearing. The lid 9 on the rear surface side is rotatably supported via 5b. A resolver 14 including a resolver rotor 12 and a resolver stator 13 is provided on the front side of the fixed piece 8 of the housing 2. The resolver 14 detects the rotation angle of the rotor 4.

  FIG. 2 schematically shows the structure of the resolver stator and the resolver rotor by a front view. 3 and 4 are cross-sectional views of main parts (FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1).

  The resolver stator 13 is formed by laminating a plurality of silicon steel plates, for example, and is formed in a substantially annular shape as shown in FIG. The resolver rotor 12 is made of an electromagnetic steel plate, and is formed into a structure in which a plurality of (six in this embodiment) convex portions 12a projecting in the radial direction are provided on the outer periphery of a substantially disc-shaped main portion. Has been. The outer surface of the convex portion 12a is curved. In other words, the resolver rotor 12 is an annular flat plate, but has a shape in which the outer contour line on the outer diameter side changes in a plurality of cycles (six cycles in the present embodiment) in plan view. .

  The resolver stator 13 includes an insulating cap that covers a stator core and a coil (not shown) wound around the stator core, and a slight gap (gap) between the teeth and the outermost end of the resolver rotor 12. Are arranged apart from each other. This gap is provided such that the gap permeance between the resolver rotor 12 and the teeth of the resolver stator 13 changes. The stator core is wound with a single-phase excitation coil and a two-phase output coil. When an AC voltage is applied to the excitation coil, an induced voltage of a sine wave or cosine wave is generated in each output coil. Is transmitted to the outside through the resolver signal line 15.

  The resolver stator 13 is provided with a plurality of elongated holes 13a located on the outer peripheral edge thereof. Each of these long holes 13a extends in the circumferential direction. The take-out connector of the resolver signal line 15 is provided at a position corresponding to a certain long hole 13a, and an output signal (induced voltage, Z-phase pulse signal) of the resolver signal line 15 can be acquired.

  A U-shaped groove (groove) 16 is formed in the resolver stator 13 at the center between the adjacent elongated holes 13a. The U-shaped groove 16 is configured so that a fitting portion 32a at the tip of a lever 32 of a position adjusting jig 17 (see FIGS. 8 and 9), which will be described later, can be fitted. Allows position adjustment in the direction.

  As shown in FIG. 2, a mounting hole 8 a for mounting the bolt of the fixed piece 8 is formed corresponding to the long hole 13 a of the resolver stator 13. In addition, in order to make it easy to understand, the position of the attachment hole 8a of the fixed piece part 8 is indicated by a dotted line in FIG.

  As shown in FIG. 3, the resolver stator 13 is fixed to the fixed piece 8 by screwing a bolt 19 into the mounting hole 8a through the long hole 13a. Therefore, the resolver stator 13 is restricted from rotating in the axial direction of the shaft 6 according to the tightening of the bolt 19.

  In the case of this embodiment, as shown in FIG. 1, the resolver stator 13 is fixed to the front side of the fixed piece 8 (opposite side of the installation side (rear side) of the rotor 4), and the resolver rotor 12 is also Further, it is arranged on the front side of the fixed piece 8.

  As shown in FIG. 1, the front lid portion 20 has a hole in the center thereof, and the shaft 6 projects to the front side through this hole. The front-side lid portion 20 is attached so as to cover the front side of the resolver 14 and is provided along the axial side surface of the shaft 6.

  The resolver rotor 12 is attached to the shaft 6 and can rotate integrally with the rotor 4. When the resolver rotor 12 rotates with the rotation of the shaft 6, the resolver 14 outputs a rotation angle signal corresponding to the rotation angle. The rotation angle signal is input to a control device (not shown) during actual use, and is used for controlling the rotating electrical machine 1.

  FIG. 4 is a cross section taken along line IV-IV in FIG. 1, and shows cross sections of the stator core 10 and the rotor 4 of the rotating electrical machine 1. The rotating electrical machine 1 employs an embedded magnet structure synchronous motor in which a permanent magnet 22 is embedded in a rotor 4 and is configured for an electric vehicle. In this embodiment, the rotor 4 has 12 poles, and the stator 3 has a 72-slot structure.

  Hereinafter, a method for adjusting the reference position of the resolver stator 13 which is a feature of the present embodiment in the method for manufacturing the rotating electrical machine 1 will be described. Since other methods for manufacturing the rotating electrical machine 1 are not related to the features of the present embodiment, the description thereof is omitted.

  FIG. 5A schematically shows the positional relationship between the resolver rotor and the resolver stator, and FIG. 5B is an explanatory diagram schematically showing the configuration during the test. As shown in FIG. 5B, the resolver rotor 12 rotates around the shaft 6 together with the rotor 4. Therefore, in order to accurately detect the rotation angle of the rotor 4, it is desirable to accurately attach the resolver stator 13 to the housing 2 of the rotating electrical machine 1.

  This is because if the reference position is deviated, an error occurs in the position detection of the rotor 4 of the rotating electrical machine 1. Further, if a position adjustment error occurs for each product, it becomes necessary to grasp the one-to-one relative position error between the rotor 4 and the resolver rotor 12 for each product and incorporate it as a parameter on the control software side. This is because it increases.

  Therefore, when the resolver stator 13 is attached, as shown in FIG. 5B, the drive shaft 23 of the test drive device 21 is connected to the shaft 6 so that the rotor 4 can rotate. Then, the reference position of the resolver stator 13 is adjusted according to the flow shown in FIG. 7 while performing measurement using the electrical measurement system shown in FIG. By performing such adjustment, for example, in actual control, it is not necessary to correct the relative position error for each product using parameters.

  As shown in the flow of FIG. 7, the probe 24 is first connected to the motor terminals (U phase, V phase, W phase) of the stator coil 11 of the terminal block (S1 in FIG. 7). A probe 24 having a predetermined band (for example, 100 MHz band) is used, and a differential signal voltage between each phase is obtained by connecting two probes between the U phase and the V phase and between the U phase and the W phase. Then, as shown in the electrical measurement system of FIG. 6, the outputs of these probes 24 are connected to the measuring device 25. The measuring instrument 25 is a digital synchroscope.

  Next, as shown in FIG. 7, a bolt 19 is inserted into the elongated hole 13a and the mounting hole 8a of the resolver stator 13, and the resolver stator 13 is temporarily fixed to the fixed piece 8 (S2 in FIG. 7). At this time, the resolver stator 13 may be temporarily fixed in a state where it can be easily rotated without dropping from the fixed piece 8. Then, since the resolver stator 13 slides along the surface of the fixed piece portion 8, the reference position of the resolver stator 13 can be easily adjusted.

  Next, the resolver signal line 15 of the resolver 14 (the output signal line of the resolver stator 13) is connected to the input terminal of an RD converter (Resolver Digital Converter) 26 (S3 in FIG. 7). The RD converter 26 is a conversion device that converts a rotation detection signal into a digital absolute position angle signal. As shown in the electrical measurement system of FIG. 6, the output signal (Z-phase pulse signal or the like) of the RD converter 26 is given to the measuring device 25.

  The RD converter 26 outputs a Z-phase pulse signal every time the convex portion 12 a of the resolver rotor 12 passes the resolver reference position (corresponding to the reference position of the resolver stator 13), and this Z-phase pulse signal is given to the measuring device 25. It is done. The convex end of the convex portion 12a corresponds to the reference point.

  In the present embodiment, a shaft multiple angle 6X having six convex portions 12a is used, so that a pulse signal is output six times each time the shaft 6 makes one rotation. Next, an adjustment jig for the resolver 14 is attached (S4 in FIG. 7).

8 to 9 are a front view and a side view, respectively, of a resolver adjustment jig. The position adjustment of the resolver stator 13 is performed using an adjustment jig 17.
The adjustment jig 17 includes a precision rotary table 29 in the center of the front surface thereof, and the precision rotary table 29 is rotated by manually adjusting the adjustment dial 30 from the outside using the adjustment knob 31. The precision rotary table 29 is connected to one lever 32 for adjusting the rotation of the resolver stator 13. As shown in FIG. 9, the lever 32 is configured such that a tip end (fitting portion) 32 a protrudes from an installation surface with respect to the fixed piece portion 8.

  FIGS. 10 to 12 are a front view, a vertical side view (a line XI-XI in FIG. 10), and a main part sectional view (particularly the lever 32), respectively, when the adjustment jig is attached to the rotating electrical machine main body. In the vicinity of the contact portion: XII-XII line in FIG. As shown in FIG. 10, the adjustment jig 17 is fixed at three places on the front surface of the fixed piece 8 by the jig fixing bolt 28.

  When the adjustment jig 17 is fixed to the front surface of the fixed piece portion 8 with the jig fixing bolt 28, the lever 32 has a tip end (fitting portion) 32a at the U of the resolver stator 13 as shown in FIG. Fit into the groove 16. When the adjustment knob 31 is manually operated from the outside, the precision rotary table 29 rotates and the lever 32 can be operated minutely. Thereby, the resolver stator 13 can be manually finely rotated. Further, as shown in FIG. 10, the adjustment jig 17 is provided with a window 17a, and the bolt 19 for attaching the resolver stator 13 can be tightened / removed from the front surface through the window 17a. .

  Returning to the flow of the adjustment method shown in FIG. After the adjustment jig 17 is mounted, the external test drive device 21 rotates the rotor 4 (motor) by rotating the shaft 6 of the rotating electrical machine 1 at a constant rotational speed through the drive shaft 23 ( S5 in FIG. As shown in the example below, in this embodiment, the rotation speed is 500 rpm or 1000 rpm. Next, the signal is measured using the measuring instrument 25 (S6 in FIG. 7). The measurement signals in step S6 are (1) an induced voltage between the V phase and the U phase, (2) an induced voltage between the U phase and the W phase, and (3) an output signal (Z phase pulse signal) of the resolver.

  Then, using the measuring instrument 25, (3) the resolver output signal (Z-phase pulse signal) of the subtracted waveform (synthesized waveform) of (1)-(2) is periodically used as a synchronization signal (corresponding to a trigger signal). Sweep and observe (S7 in FIG. 7). The RD converter 26 outputs a Z-phase pulse signal. The rising timing of the Z-phase pulse signal is set to a zero point, and the composite waveform (subtracted waveform of (1)-(2)) obtained in step S7 is until the timing of zero crossing. Difference (Δx) is measured (S8 in FIG. 7).

  Then, it is determined whether or not Δx is within the target adjustment range (S9 in FIG. 7). When it is not within the target adjustment range (S9: NO in FIG. 7), adjustment is performed using the adjustment jig 17 (FIG. 7). 7 S10). At this time, adjustment is performed by manually operating the adjustment knob 31 of the adjustment jig 17, and the process returns to step S8.

  When it is within the target adjustment range (S9 in FIG. 7: YES), the adjustment by the adjustment jig 17 is finished, and six temporarily fixed positions of the resolver stator 13 are fixed (S11 in FIG. 7). If the resolver stator 13 is permanently fixed with the bolts 19, there is a possibility that the position of the resolver stator 13 is slightly shifted. Therefore, it is reconfirmed whether it is within the target adjustment range (S12 in FIG. 7). If not (S12: NO in FIG. 7), the bolt 19 for fixing the resolver stator 13 is loosened and temporarily fixed. Return (S13 in FIG. 7), narrow the target adjustment range (S14 in FIG. 7), and return to step S8. The reason for narrowing the target adjustment range is to eliminate the possibility of an infinite loop. Even if the main fixing is performed and the reconfirmation is made, the adjustment is completed if it is within the target adjustment range (S12 in FIG. 7: YES). In this way, the reference position of the resolver stator 13 is adjusted.

FIG. 13 shows the relationship between the Z-phase pulse signal and the target adjustment position of each induced voltage waveform in the present embodiment with an ideal waveform.
As described above, the Z-phase pulse signal is generated every time the convex portion 12a of the resolver rotor 12 passes the reference position. When the shaft 6 makes one rotation, the Z-phase pulse signal is output six times during this time. At this time, as shown in FIG. 13, the differential voltage ((V−U) − (U−W)) of the induced voltage is used, and the zero cross timing of the differential voltage and the generation timing of the Z-phase pulse signal are matched.

In principle, adjustment can be made with an amplitude that is approximately twice the amplitude of the interphase induced voltage , making it easier to grasp the zero-cross timing and suppressing errors. By unifying the timing among the product lots, for example, it is not necessary to manage the control software or the like on a one-to-one basis for each product of the rotating electrical machine 1. You may make it match | combine the zero cross timing of the induced voltage of each phase (for example, U phase in the example of FIG. 13) and the generation timing of a Z-phase pulse signal.

  FIG. 14 shows an induced voltage between phases and a resultant voltage waveform in an actual waveform example. According to the analysis results of the inventors, it has been found that harmonics of the 6th, 12th and 14th components are generated in the combined voltage waveform of the induced voltage between the phases. This is because a resolver stator 13 having 14 slots (number of stator teeth) is used and a resolver rotor 12 having a shaft angle multiplier of 6X is used, and it can be assumed that harmonics of these orders are generated. . Further, since the 14th-order component cannot be divided by 6 (axial multiple), it can be estimated that a position error has occurred. In accordance with the error generated from the resolver 14, the output timing of the Z-phase pulse signal generates an error from the ideal position.

  The Z-phase pulse signal of the resolver 14 is output six times during one rotation of the shaft 6, and this Z-phase pulse signal is used as a synchronization signal to obtain the difference voltage (V−U) − (U−W). Observe the composite waveform. Then, the output signal of the resolver 14 can be averaged and observed, and the reference position of the resolver stator 13 can be easily adjusted to the averaged target position.

  FIG. 15A shows an example of a waveform before adjustment, and FIG. 15B shows an example of a waveform after adjustment. FIG. 16 shows a relation table between the rotation speed and the target adjustment value. The measuring device (synchronous scope: display device) 25 outputs a signal using a synchronization signal as a trigger signal. For this reason, the test drive device 21 observes the display waveform of the measuring instrument 25 using the Z-phase pulse signal as a synchronization signal in a state where the shaft 6 is rotated at a constant rotation speed (for example, 500 rpm, 1000 rpm) through the drive shaft 23. For example, the induced voltage waveform (the induced voltage of each phase, the induced voltage between phases, or the difference voltage between the induced voltages between phases) can be observed using the averaging function of the measuring instrument (synchronoscope) 25.

  As shown in FIG. 16, for example, assuming that the target accuracy of the electrical angle is ± 0.500 °, the target adjustment value ± in terms of the time axis is obtained when the test drive device 21 rotates the shaft 6 at the rotational speed N = 500 rpm. It becomes less than 27.778 μsec. When the test drive device 21 rotates the shaft 6 at 1000 rpm, the target adjustment value becomes less than ± 13.889 μsec in terms of time axis.

  In the example shown in FIG. 15A, the time lag Δt1 before adjustment is observed in a state where the target adjustment value is not satisfied (for example, −150 μsec). By manually operating the adjustment knob 31 and rotating and sliding the resolver stator 13 to adjust the position, as shown in FIG. 15 (B), a state that satisfies the target adjustment value for the adjusted time difference Δt2 (for example, −10 μsec). This indicates that the target adjustment value can be suppressed to less than ± 27.778 μsec. As shown in FIG. 16, when the adjustment is performed manually after observation at the time of manufacturing as described above, it can be suppressed to less than the target adjustment value.

  According to the present embodiment, an induced voltage waveform generated in the stator coil 11 using the Z-phase pulse signal output every time the convex end of the convex portion 12a of the resolver rotor 12 passes the reference position as a synchronization signal is measured by the measuring instrument 25. The mounting angle of the resolver stator 13 is adjusted by shortening the time interval between the zero cross point of the induced voltage waveform and the pulse generation timing of the Z-phase pulse signal. For this reason, the reference position of the resolver stator 13 can be adjusted mechanically with high accuracy. Also, the work time can be shortened.

  Moreover, it adjusts using an interphase induced voltage waveform as an induced voltage waveform. Moreover, it adjusts using the synthetic | combination voltage waveform of two phase induction voltage waveforms. Further, the measurement is performed by sweeping and displaying on the measuring instrument 25 along the time axis. The adjusting jig 17 adjusts the circumferential position of the resolver stator 13 by fitting the rotation adjusting lever 32 into the U-shaped groove 16 and sliding the resolver stator 13 in the circumferential direction of the shaft 6. . This adjustment makes it easier to adjust manually.

  In addition, it is confirmed whether it is within the target adjustment range when temporarily fixed, and it is reconfirmed whether it is within the target adjustment range when permanently fixed. For this reason, if it is not within the target adjustment range after the main fixing, the readjustment is repeated until the target adjustment range is entered, so that the reliability of the alignment of the resolver stator 13 can be improved.

  Further, among a plurality of (six times) Z-phase pulse signals during one rotation of the shaft 6, a predetermined Z-phase pulse signal may be adjusted as a trigger signal. The generation timing of the phase pulse signal and the zero cross timing of the composite waveform of the differential voltage (V phase-U phase)-(U phase-W phase) may be adjusted. In this way, if it is adjusted to a predetermined Z-phase pulse signal, it is not necessary to provide a parameter for each product for control.

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

  In the drawings, 1 is a rotating electrical machine, 2 is a housing (rotary electrical machine body), 4 is a rotor, 6 is a shaft, 11 is a stator coil, 12 is a resolver rotor, 13 is a resolver stator, 13a is a long hole, and 14 is a resolver. , 16 is a U-shaped groove (groove), 17 is an adjustment jig, 25 is a measuring instrument (display), and 32a is a tip portion (fitting portion).

Claims (7)

Displaying a differential voltage waveform of two interphase induced voltages of the stator coil on a display using a Z-phase pulse signal output every time the reference point of the resolver rotor passes the reference position as a trigger signal;
The resolver stator mounting angle is adjusted via a jig so as to shorten the time interval between the zero-cross point of the differential voltage waveform displayed on the display and the pulse generation timing of the Z-phase pulse signal. And a step of attaching to the main body. The method of manufacturing a rotating electrical machine according to claim 1 , wherein the differential voltage waveform includes a composite voltage waveform of (V phase-U phase)-(U phase-W phase) . 3. The method of manufacturing a rotating electrical machine according to claim 1, wherein the display is swept on a time axis and displayed . 4. The manufacturing of the rotating electrical machine according to claim 1, wherein the differential voltage waveform is averaged and displayed on the display using the Z-phase pulse signal serving as the trigger signal as a synchronization signal. 5. Method. The rotor rotates with the resolver rotor,
The differential voltage waveform is displayed on the display using a predetermined Z-phase pulse signal determined in advance among the plurality of Z-phase pulse signals generated during one rotation of the rotor as the trigger signal. The manufacturing method of the rotary electric machine of any one of Claims 1-3 . Apply the method of temporarily fixing the resolver stator after temporarily fixing,
It is confirmed whether it is within a target adjustment range when temporarily fixed, and after adjusting the mounting angle of the resolver stator, it is confirmed again whether it is within the target adjustment range when the main fixing is performed. The manufacturing method of the rotary electric machine of any one of claim | item 1 -5 . It is used when adjusting the mounting angle of the resolver stator using the method for manufacturing a rotating electrical machine according to claim 1,
The resolver stator is provided with a plurality of elongated holes located at the peripheral edge thereof and spaced apart from each other along the circumferential direction of the shaft, and with a groove between the plurality of elongated holes,
An adjustment jig comprising a fitting portion that fits into the groove and rotates the resolver stator in a circumferential direction of the shaft .

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