WO2017068674A1

WO2017068674A1 - Electric motor, outdoor unit for air conditioning device, and air conditioning device

Info

Publication number: WO2017068674A1
Application number: PCT/JP2015/079756
Authority: WO
Inventors: 隼一郎尾屋; 及川　智明; 山本　峰雄; 石井　博幸; 洋樹麻生; 優人浦辺; 貴也下川
Original assignee: 三菱電機株式会社
Priority date: 2015-10-21
Filing date: 2015-10-21
Publication date: 2017-04-27
Also published as: JP6506406B2; JPWO2017068674A1

Abstract

This electric motor includes: a rotor that rotates about a rotation axis; a stator that has a plurality of winding wires and that is arranged on the outside, in a direction orthogonal to the rotation axis, of the rotor; a detector that detects the position of the rotor; and a housing that contains the rotor, the stator, and the detector therein and that has an information holding part for holding information including an inductance value of the winding wires and the phase deviation between an induced voltage by the winding wires and a detected value by the detector.

Description

Electric motor, air conditioner outdoor unit, and air conditioner

The present invention relates to a brushless electric motor, an outdoor unit of an air conditioner, and an air conditioner.

Brushless electric motors are widely used in devices such as air conditioners, ventilation fans or machine tools. In Patent Document 1, a storage medium in which position error information of a rotation sensor is stored is integrally provided in a readable state when a control device that controls the rotating electrical machine is assembled, and the position error information includes back electromotive force. It is described that this is information on the zero point error between the voltage waveform as the information of the above and the pulse signal as the output information from the rotation sensor.

JP 2009-232551 A

The technique described in Patent Document 1 uses information on a zero-point error between a voltage waveform as back electromotive force information and a pulse signal as output information from the rotation sensor, so that The phase difference between them can be easily adjusted.

The electric motor may be subjected to advance angle control in which the phase of the current flowing through the stator coil is advanced with respect to the induced voltage for the purpose of improving efficiency or reducing noise. The technology of Patent Document 1 does not take into consideration other than information on the zero point error, and there is room for improvement in order to realize advance angle control that suppresses variations in the characteristics of the motor.

The object of the present invention is to realize advance angle control that suppresses variations in the characteristics of an electric motor.

The electric motor according to the present invention includes a rotor, a stator, a detector, and a housing. The rotor rotates around the rotation axis. The stator has a plurality of windings and is disposed outside the rotor in a direction orthogonal to the rotation axis. The detector detects the position of the rotor. The housing houses a rotor, a stator, and a detector. The stator has an information holding portion for holding information including an inductance value of the winding and a phase shift between the induced voltage of the winding and the detection value of the detector.

According to the present invention, it is possible to realize an advance angle control that suppresses variations in the characteristics of the electric motor.

The figure which shows the electric motor which concerns on Embodiment 1. FIG. AA sectional view of FIG. The figure which shows the coil | winding with which the electric motor which concerns on Embodiment 1 is equipped, the control apparatus for controlling an electric motor, and a driver The figure for demonstrating the information of the electric motor contained in the barcode concerning Embodiment 1 Diagram showing the relationship between the induced voltage and the detection value of the detector Diagram for explaining phase shift Diagram showing an example of measured values of induced voltage Diagram for explaining the induced voltage constant Diagram for explaining advance angle control Diagram for explaining advance angle control Diagram for explaining advance angle control The flowchart which shows an example of the manufacturing method of the electric motor which concerns on Embodiment 1. The figure which shows an example of the apparatus which test | inspects an electric motor The figure which shows the air conditioning apparatus which concerns on Embodiment 2. FIG. The figure which shows the air conditioning apparatus which concerns on Embodiment 2. FIG. The figure which shows the air blower of the outdoor unit which the air conditioning apparatus which concerns on Embodiment 2 has. The figure which shows the outdoor unit of the air conditioning apparatus which concerns on Embodiment 2. FIG.

Hereinafter, an electric motor, an outdoor unit of an air conditioner, and an air conditioner according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments.

Embodiment 1 FIG.
1 is a diagram illustrating an electric motor according to a first embodiment. In the first embodiment, the electric motor 1 is a brushless DC (Direct Current) electric motor. As shown in FIG. 1, the electric motor 1 includes a housing 2, a shaft 3, a barcode 4, and device information 5. The shaft 3 protrudes from the housing 2. The power of the electric motor 1 is taken out from the portion of the shaft 3 protruding from the housing 2. The bar code 4 includes information on the electric motor 1. In Embodiment 1, the barcode 4 is a two-dimensional code, but is not limited to this. The bar code 4 may be a one-dimensional code. The information on the electric motor 1 includes information on the characteristics of the electric motor 1. The device information 5 is information for identifying the electric motor 1. The device information 5 includes at least one of a model name, a model name, and a serial number of the electric motor 1. The device information 5 may further include at least one of the manufacturer and the date of manufacture.

FIG. 2 is a cross-sectional view taken along the line AA in FIG. The electric motor 1 includes a rotor 10 that rotates about an axis Zr, a plurality of windings 22, a stator 20 that is disposed outside the rotor 10 in a direction DR orthogonal to the axis Zr, and the rotor 10. And the rotor 10, the stator 20, and the detector 8, and the inductance value of the winding 22 and the phase between the induced voltage of the winding 22 and the detection value of the detector 8. And a housing 2 having a barcode 4 which is an information holding portion for holding information including a shift. Hereinafter, the axis Zr is appropriately referred to as a rotation axis Zr, and the direction DR orthogonal to the rotation axis Zr is appropriately referred to as a radial direction DR. In the first embodiment, the housing 2 has a barcode 4 as an information holding portion on the outer surface 2S. That is, in Embodiment 1, the barcode 4 is provided on the outer surface 2S of the housing 2.

The rotor 10 includes an insulator 11 and a permanent magnet 12 disposed on the outer periphery of the insulator 11. In the first embodiment, the rotor 10 further includes a position detection magnet 13. The rotor 10 is disposed on the radially outer side of the shaft 3 and is fixed to the shaft 3. The rotor 10 is a cylindrical structure, and the rotation axis Zr passes through the center of both end faces. The shaft 3 extends along the rotation axis Zr. The shaft 3 protrudes from both ends of the rotor 10. The rotor 10 obtains a rotational force by the rotating magnetic field from the stator 20 and transmits torque to the shaft 3 to drive a load connected directly or indirectly to the shaft 3. The length by which the shaft 3 protrudes from the rotor 10 is longer when the load is connected to the shaft 3 than when the load is not connected.

The position detection magnet 13 is attached to one end of the rotor 10 in the direction in which the rotation axis Zr extends, that is, in the rotation axis direction. More specifically, the position detection magnet 13 is attached to the end of the rotor 10 on the side where the load is not connected to the shaft 3. In the position detection magnet 13, the N pole and the S pole are alternately repeated along the circumferential direction of the rotor 10 around the rotation axis Zr. The detector 8 is disposed at a portion facing the position detection magnet 13. The detector 8 detects between the poles of the position detection magnet 13, that is, between the N pole and the S pole or between the S pole and the N pole. In the first embodiment, the number of poles of the position detection magnet 13 is the same as the number of poles of the rotor 10.

The permanent magnet 12, the position detecting magnet 13, and the shaft 3 are integrally formed of resin injected by a vertical molding machine. At this time, the resin is interposed between the permanent magnet 12 and the shaft 3 and between the position detection magnet 13 and the shaft 3 to couple them. The insulator 11 of the rotor 10 is a cured resin that is interposed between the permanent magnet 12 and the shaft 3 and between the position detection magnet 13 and the shaft 3. The resin used for the insulator 11 is a thermoplastic resin such as PBT (Polybutylene terephthalate) or PPS (Polyphenylenesulfide), and is a resin in which a glass filler is blended with these resins. There may be. In the first embodiment, the permanent magnet 12 is a resin magnet, a rare earth magnet (neodymium magnet or samarium iron magnet) formed by mixing a thermoplastic material with a magnetic material, or a sintered ferrite magnet, but is not limited thereto. Not.

In the rotation axis direction, the shaft 3 has a first bearing 6T attached to the load side and a second bearing 6B attached to the side opposite to the load side. The first bearing 6T is supported by the housing 2 via a bracket 7 attached to the housing 2. The bracket 7 is manufactured by pressing a conductive metal. The bracket 7 is fitted into the inner peripheral portion of the stator 20, and the outer ring of the first bearing 6T is fitted inside.

The second bearing 6B is attached to the housing 2. With such a structure, the shaft 3 is supported by the housing 2 via the first bearing 6T and the second bearing 6B. In the first embodiment, the first bearing 6T and the second bearing 6B are ball bearings, but the first bearing 6T and the second bearing 6B are not limited to ball bearings. Hereinafter, a structure in which the first bearing 6T and the second bearing 6B are attached to the shaft 3 assembled to the rotor 10 is appropriately referred to as a rotor assembly.

The stator 20 includes an annular stator core 21, a winding 22, and an insulator 23 interposed between the stator core 21 and the winding 22. The stator 20, more specifically, the stator core 21 is disposed outside the rotor 10 in the direction DR orthogonal to the rotation axis Zr, that is, in the radial direction DR. The stator 20 has a plurality of windings 22 along the circumferential direction of the stator core 21.

The stator core 21 is a structure in which a plurality of annular electromagnetic steel plates are laminated and joined by caulking, welding, or adhesion. The insulator 23 insulates the stator core 21 and the winding 22 from each other. In the first embodiment, the insulator 23 is molded integrally with the stator core 21 using a thermoplastic resin. The thermoplastic resin used for the insulator 23 is exemplified by PBT. The plurality of windings 22 are arranged in each slot of the stator core 21 molded integrally with the insulator 23. The winding 22 may be concentrated winding or distributed winding.

In the first embodiment, the stator 20, the substrate 9, and the connector 31 are mechanically combined with resin and molded integrally. The resin that combines the stator 20, the substrate 9, and the connector 31 is the housing 2. The substrate 9 has a circuit including the detector 8. The detector 8 includes a Hall element and a Hall IC (Integral Circuit) for detecting the position of the magnetic pole of the rotor 10. The detector 8 detects the position of the magnetic pole of the rotor 10 by detecting the distance between the magnetic poles of the position detection magnet 13 included in the insulator 11 of the rotor 10. In the first embodiment, the detector 8 includes a Hall element and a Hall IC, but the detector 8 is not limited to this.

The substrate 9 is disposed between the second bearing 6B and the stator 20. The board 9 is disposed so that the board surface is perpendicular to the rotation axis Zr. The substrate 9 is fixed to the insulator 23 via a substrate holding component. The substrate 9 may be directly fixed to the insulator 23. The substrate 9 is connected to a signal line 30 connected to a control device outside the electric motor 1. The signal line 30 is connected to the control device 100 outside the electric motor 1 via the connector 31.

FIG. 3 is a diagram illustrating a winding, a control device for controlling the motor, and a driver included in the electric motor according to the first embodiment. The stator 20 of the electric motor 1 includes a U-phase winding 22u, a V-phase winding 22v, and a W-phase winding 22w. Each winding 22u, 22v, 22w is connected to the driver 103. The driver 103 is an inverter provided with a plurality of switching elements. The driver 103 is controlled by the control device 100.

The electric motor 1 has three

detectors

8u, 8v, and 8w. The three

detectors

8u, 8v, 8w are arranged at equal intervals along the circumferential direction of the stator 20. In the first embodiment, the detector 8u detects the position of the rotor 10 at the position of the U-phase winding 22u, and the detector 8v detects the position of the rotor 10 at the position of the V-phase winding 22v. The detector 8w detects the position of the rotor 10 at the position of the W-phase winding 22w. The control device 100 acquires the detection values SCu, SCv, SCw of the

detectors

8 u, 8 v, 8 w and controls the electric motor 1 via the driver 103.

The control device 100 includes a processing unit 101 and a storage unit 102. The storage unit 102 is a processor such as a CPU (Central Processing Unit), and the storage unit 102 is a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, or a combination of these. The storage unit 102 stores a computer program for controlling the electric motor 1 and information on the electric motor 1. Information on the electric motor 1 is converted into the barcode 4 shown in FIG. 1 and provided on the outer surface 2S of the housing 2.

When the processing unit 101 controls the electric motor 1, the computer program and various information of the electric motor 1 described above are read from the storage unit 102. The electric motor 1 executes the read computer program, generates a drive signal that is a signal for driving the electric motor 1 using the information of the electric motor 1, and outputs the drive signal to the driver 103. The driver 103 generates drive voltages Edu, Edv, Edw corresponding to the drive signals and applies them to the

windings

22u, 22v, 22w. Hereinafter, when the

windings

22u, 22v, and 22w are not distinguished from each other, they are appropriately referred to as windings 22. When the

detectors

8u, 8v, and 8w are not distinguished from each other, they are appropriately referred to as detectors 8. When the detection values SCu, SCv, and SCw are not distinguished from each other. The detection value SC is appropriately referred to, and when the drive voltages Edu, Edv, and Edw are not distinguished, they are appropriately referred to as the drive voltage Ed.

FIG. 4 is a diagram for explaining information of the electric motor included in the barcode according to the first embodiment. In the first embodiment, the information IFm of the electric motor 1 is converted into the barcode 4 and provided on the outer surface 2S of the casing 2 of the electric motor 1. The information IFm of the electric motor 1 is information regarding the characteristics of the electric motor 1. In the first embodiment, the information IFf of the electric motor 1 includes the inductance values Lu, Lv, Lw of the winding 22, phase shifts Δθeu, Δθev, Δθew, induced voltages Eiu, Eiv, Eiw, induced voltage constants Ciu, Civ, Ciw, And winding resistances Ru, Rv, and Rw, but are not limited thereto.

The alphabet u added to the signs of the inductance value, phase shift, induced voltage, induced voltage constant, and winding resistance indicates the value of the U-phase winding 22u, and the alphabet v represents the V-phase winding. The value of the line 22v indicates the value, and the alphabet w indicates the value of the W-phase winding 22w. In the following, when the U phase, the V phase, and the W phase are not distinguished, each of the above-described symbols is represented without the alphabets u, v, and w. The inductance value L, the phase shift Δθe, the induced voltage Ei, the induced voltage constant Ci, and the winding resistance R of the winding 22 are among the measured values measured in the inspection after the motor 1 is completed. 1 measured value and a value obtained from the measured value.

In the first embodiment, the inductance values Lu, Lv, Lw of the windings 22 of the motor 1 that have passed the inspection after the completion of the motor 1 are recorded as the barcode 4 on the outer surface 2S of the casing 2 of the motor 1. The barcode 4 is read by a barcode reader and stored in the storage unit 102 of the control device 100 shown in FIG. When controlling the electric motor 1, the processing unit 101 of the control device 100 reads the inductance values Lu, Lv, and Lw of the winding 22 from the storage unit 102 and uses them for the advance angle control, thereby improving the efficiency of the electric motor 1. , Noise and vibration can be reduced.

FIG. 5 is a diagram showing the relationship between the induced voltage and the detection value of the detector. FIG. 6 is a diagram for explaining the phase shift. 5 and 6, the horizontal axis represents the electrical angle θe of the rotor 10, and the vertical axis represents the voltage. The detection values SCu, SCv, SCw and the induced voltages Eiu, Eiv, Eiw are different in magnitude, but in FIGS. 5 and 6, they are shown as the same magnitude for convenience. The induced voltage Ei is a voltage generated in the winding 22 by the movement of the permanent magnet 12 of the rotor 10. As for the induced voltage Ei, a positive voltage and a negative voltage are switched at an electrical angle of 180 degrees around 0 volts (Volt).

The detection value SC indicates 0 volt between the poles of the position detection magnet 13 shown in FIG. 2 by the detector 8 shown in FIGS. 2 and 3, and shows a positive voltage or a negative voltage depending on the polarity. In the first embodiment, as described above, since the number of poles of the position detection magnet 13 and the number of poles of the rotor 10 are equal, the position of the rotor 10 is detected by detecting the position of the position detection magnet 13. Is also detected. Hereinafter, a position where the detection value SC and the induced voltage Ei change from plus to minus or minus to plus is referred to as a zero cross point.

The zero-cross point differs between the U-phase induced voltage Eiu and the detected value SCu of the detector 8u. That is, both are out of phase. The V-phase induced voltage Eiv and the detection value SCv of the detector 8v are out of phase. Both the W-phase induced voltage Eiw and the detection value SCw of the detector 8w are out of phase as in the U-phase and the W-phase.

As shown in FIG. 6, the difference Δθe between the electrical angle of the induced voltage Ei at the zero cross point and the electrical angle of the detection value SC of the detector 8 at the zero cross point is a phase shift. In the example shown in FIG. 6, since the electrical angle at the zero cross point of the induced voltage Ei is θe1 and the electrical angle at the zero cross point of the detection value SC is θe2, the magnitude Δθe of the phase shift is θe2−θe1. In the example shown in FIG. 6, the zero cross point of the detection value SCu of the detector 8u is θe2, the zero cross point of the detection value SCv of the detector 8v is θe3, the zero cross point of the detection value SCw of the detector 8w is θe4, and the electric motor 1 has. It is assumed that the zero cross point of the design values of the

detectors

8u, 8v, 8w is θe5.

Due to manufacturing variations of the electric motor 1 including manufacturing variations of the rotor 10 and the stator 20, variations among the detected values SCu, SCv, SCw, and design values of the

detectors

8u, 8v, 8w and detected values SCu. , SCv, and SCw occur. Due to this variation, the noise and vibration of the electric motor 1 may increase or the efficiency may decrease.

In Embodiment 1, the measured values of the induced voltages Eiu, Eiv, Eiw of each phase of the electric motor 1 that have passed the inspection after the completion of the electric motor 1, and the detected values SCu, SCv, SCw of the

detectors

8u, 8v, 8w Are used to determine the phase shifts Δθeu, Δθev, Δθew. The phase shift Δθe is recorded as the barcode 4 on the outer surface 2S of the housing 2 of the electric motor 1. The barcode 4 is read by a barcode reader and stored in the storage unit 102 of the control device 100 shown in FIG. When controlling the electric motor 1, the processing unit 101 of the control device 100 reads the phase shifts Δθeu, Δθev, Δθew from the storage unit 102 and corrects the phase shifts Δθeu, Δθev, Δθew to be design values. 1 can be suppressed, and further noise and vibration can be suppressed.

FIG. 7 is a diagram showing an example of the measured value of the induced voltage. Due to the manufacturing variation of the electric motor 1 including manufacturing variations of the rotor 10 and the stator 20, as shown in FIG. 7, variations occur in the induced voltages Eiu, Eiv, Eiw. In the example shown in FIG. 7, the maximum values Eium, Eivm, and Eiwm of induced voltages of the U phase, the V phase, and the W phase are different. Due to this variation, the noise and vibration of the electric motor 1 may increase or the efficiency may decrease.

In Embodiment 1, the induced voltages Eiu, Eiv, and Eiw of the electric motor 1 that have passed the inspection after the completion of the electric motor 1 are recorded as the barcode 4 on the outer surface 2S of the casing 2 of the electric motor 1. The induced voltages Eiu, Eiv, Eiw, which are information to be converted into the barcode 4, are values measured by the inspection after the completion of the electric motor 1, that is, measured values. The barcode 4 is read by a barcode reader and stored in the storage unit 102 of the control device 100 shown in FIG.

The difference in the ease of transmission of magnetic force from the U-phase, V-phase, and W-phase slots of the electric motor 1 to the rotor of the electric motor 1 is the difference in the measured values of the induced voltages Eiu, Eiv, Eiw in the U-phase, V-phase, and W-phase. It becomes. Therefore, by changing the phase current or the phase voltage according to the measured values of the induced voltages Eiu, Eiv, Eiw, the torque and magnetic force generated from the U-phase, V-phase, and W-phase slots are made uniform. As a result, the reduction in efficiency and the noise reduction of the electric motor 1 are realized. When controlling the electric motor 1, the processing unit 101 of the control device 100 reads the induced voltages Eiu, Eiv, Eiw from the storage unit 102 and corrects the variations of the induced voltages Eiu, Eiv, Eiw to be zero. Specifically, the processing unit 101 determines the duty of the U phase, the V phase, and the W phase according to the measured values of the induced voltages Eiu, Eiv, and Eiw of the U phase, V phase, and W phase read from the storage unit 102. Correct at least one of the advance angles. By such a process, the electric motor 1 is suppressed from decreasing in efficiency, and further, noise and vibration are suppressed.

FIG. 8 is a diagram for explaining the induced voltage constant. As shown in FIG. 8, the induced voltage constant Ci is a ratio of the change β of the induced voltage Ei to the change α of the rotational speed N of the electric motor 1. That is, the induced voltage constant Ci = β / α. As described above, the induced voltages Eiu, Eiv, and Eiw of the U phase, V phase, and W phase vary, and the induced voltage constants Ciu, CIv, and Ciw vary, thereby increasing the noise and vibration of the motor 1 and increasing the efficiency. It may decrease.

In Embodiment 1, the induced voltage constants Ciu, Civ, and Ciw of the electric motor 1 that have passed the inspection after the completion of the electric motor 1 are recorded as the barcode 4 on the outer surface 2S of the casing 2 of the electric motor 1. The barcode 4 is read by a barcode reader and stored in the storage unit 102 of the control device 100 shown in FIG. When controlling the electric motor 1, the processing unit 101 of the control device 100 reads the induced voltage constants Ciu, Civ, and Ciw from the storage unit 102 and corrects the variations of the induced voltage constants Ciu, Civ, and Ciw to be zero. Specifically, the processing unit 101 determines the duty of the U phase, V phase, and W phase according to the measured values of the induced voltage constants Ciu, Civ, and Ciw of the U phase, V phase, and W phase read from the storage unit 102. And correct the advance angle. By such a process, the electric motor 1 is suppressed from decreasing in efficiency, and further, noise and vibration are suppressed.

Due to manufacturing variations of the electric motor 1 including manufacturing variations of the rotor 10 and the stator 20, the winding resistances Ru, Rv, Rw of the

windings

22u, 22v, 22w may vary. Due to variations in the winding resistances Ru, Rv, and Rw, there is a possibility that noise and vibration of the motor 1 may increase or efficiency may decrease.

In Embodiment 1, the winding resistances Ru, Rv, Rw of the electric motor 1 that have passed the inspection after the completion of the electric motor 1 are recorded as the barcode 4 on the outer surface 2S of the casing 2 of the electric motor 1. The barcode 4 is read by a barcode reader and stored in the storage unit 102 of the control device 100 shown in FIG. When controlling the electric motor 1, the processing unit 101 of the control device 100 reads the winding resistances Ru, Rv, Rw from the storage unit 102 and corrects the variations of the winding resistances Ru, Rv, Rw to be zero. Specifically, the processing unit 101 determines the duty of the U phase, V phase, and W phase according to the measured values of the winding resistances Ru, Rv, and Rw of the U phase, V phase, and W phase read from the storage unit 102. And correct the advance angle. By such a process, the electric motor 1 is suppressed from decreasing in efficiency, and further, noise and vibration are suppressed.

Further, when controlling the electric motor 1, the processing unit 101 of the control device 100 reads the inductance values Lu, Lv, Lw of the winding 22 from the storage unit 102 and uses them for the advance angle control. By doing in this way, since the control apparatus 100 can implement | achieve the advance angle control which suppressed the dispersion | variation in the characteristic of the electric motor 1, it can improve the efficiency of the electric motor 1 or can reduce a noise and a vibration. Next, the advance angle control performed by the processing unit 101 of the control device 100 using the information IFm of the electric motor 1 will be described.

9 to 11 are diagrams for explaining the advance angle control. When the driver 103 shown in FIG. 3 applies the drive voltage Ed to the winding 22, a current Id flows through the winding 22. This current is referred to as winding current Id. The rotor 10 is rotated by the magnetic flux generated by the winding current Id and the magnetic flux generated by the permanent magnet 12 included in the rotor 10. The advance angle control is a control for improving the efficiency of the electric motor 1 or reducing noise and vibration by advancing the phase of the winding current Id of the stator 20.

In the example shown in FIG. 9, the drive voltage Ed and the induced voltage Ei are in phase. The winding current Id is delayed in phase from the induced voltage Ei. The torque of the electric motor 1 can be maximized by advancing the winding current Id so that the phase of the winding current Id matches the phase of the induced voltage Ei. In order to advance the phase of the winding current Id, the phase of the drive voltage Ed may be advanced. The phase of the drive voltage Ed is advanced by φ in electrical angle with respect to the phase of the winding current Id. Hereinafter, φ is appropriately referred to as a phase difference φ. The phase difference φ is a phase difference between the drive voltage Ed and the winding current Id, and can be obtained by Expression (1). L is the inductance of the winding 22, and R is the resistance of the path of the current flowing from the driver 103 to the winding 22. R may be a resistance of the winding 22. ω is the angular velocity of the rotor 10.
φ = tan ⁻¹ (ω × L / R) (1)

FIG. 10 shows an example in which the phase of the induced voltage Ei matches the phase of the winding current Id. In this case, the minus to plus zero cross point of the induced voltage Ei is matched with the minus to plus zero cross point of the winding current Id. The electrical angle θei0 of the rotor 10 at a timing earlier by the phase shift Δθe than the electrical angle θes0 of the rotor 10 which is the zero cross point when the detection value SC of the detector 8 changes from minus to plus is the minus of the induced voltage Ei. It becomes the zero crossing point when it becomes plus. The processing unit 101 of the control device 100 applies the drive voltage Ed to the winding 22 at a timing earlier than the timing at which the detection value SC of the detector 8 becomes the electrical angle θes0 by a value obtained by adding the phase shift Δθe and the phase difference φ. May be applied. When the control device 100 performs advance angle control to make the phase of the induced voltage Ei coincide with the phase of the winding current Id, the processing unit 101 may generate the drive voltage Ed according to the equation (2). In equation (2), Edm is ½ of the difference between the maximum value and the minimum value of the amplitude of the drive voltage Ed. t is time.
Ed = Edm × sin (ω × t− (φ + Δθe)) (2)

FIG. 11 shows an example in which the phase of the induced voltage Ei is further advanced by the electrical angle θdf than the phase of the winding current Id. In this case, the processing unit 101 of the control device 100 has a timing that is earlier by a value obtained by adding the phase shift Δθe, the phase difference φ, and the electrical angle θdf than the timing at which the detection value SC of the detector 8 becomes the electrical angle θes0. The drive voltage Ed may be applied to the winding 22. That is, the processing unit 101 of the control device 100 may generate the drive voltage Ed according to the equation (3). In Expression (3), Edm is ½ of the difference between the maximum value and the minimum value of the amplitude of the drive voltage Ed. t is time. Hereinafter, the electrical angle θdf is referred to as an adjustment amount as appropriate. When the sign of the adjustment amount θdf is positive, the winding current Id advances in phase with respect to the induced voltage Ei, and when the sign of the adjustment amount θdf is negative, the winding current Id is delayed in phase with respect to the induced voltage Ei. When the adjustment amount θdf is 0, Expression (3) is the same as Expression (2).
Ed = Edm × sin (ω × t− (φ + θdf + Δθe)) (3)

As can be seen from Equation (1), the phase difference φ includes the inductance value L of the winding 22. As described above, the inductance values Lu, Lv, and Lw of the

windings

22u, 22v, and 22w are read from the barcode 4 and stored in the storage unit 102 of the control device 100. Therefore, when executing the advance angle control, the processing unit 101 of the control device 100 reads the inductance values Lu, Lv, and Lw from the storage unit 102, and uses the read values and Expression (3) to calculate the drive current Ed. Applied to the

windings

22u, 22v, 22w. By doing in this way, the influence of the dispersion | variation in the inductance values Lu, Lv, and Lw of winding 22u, 22v, and 22w can be reduced, and the improvement of the efficiency of the electric motor 1 and reduction of a noise and a vibration can be implement | achieved. . In addition to the inductance values Lu, Lv, and Lw, the processing unit 101 of the control device 100 uses the values of the winding resistances Ru, Rv, and Rw read from the barcode 4 and stored in the storage unit 102. Further improvement in the efficiency of the electric motor 1 and further reduction in noise and vibration can be realized.

As described above, the phase shifts Δθeu, Δθev, Δθew are read from the barcode 4 into the storage unit 102 of the control device 100 and stored. Therefore, when executing the advance angle control, the processing unit 101 of the control device 100 reads out the phase shifts Δθeu, Δθev, Δθew from the storage unit 102, and uses the read values and Expression (3) to calculate the drive current Ed. Applied to the

windings

22u, 22v, 22w. By doing in this way, the influence of the dispersion | variation in phase shift (DELTA) (theta) eu, (DELTA) (theta) ev, (DELTA) (theta) ew can be reduced, and the further improvement of the efficiency of the electric motor 1 and the further reduction of a noise and a vibration can be implement | achieved.

In the advance angle control, the processing unit 101 of the control device 100 can calculate the advance angle at which the efficiency is highest at the maximum output of the electric motor 1, and can control the advance angle. By such processing, the processing unit 101 can cause the electric motor 1 to generate a high torque with less current, and thus can improve the maximum output of the electric motor 1. Further, the advance angle at which the efficiency of the electric motor 1 is highest is different from the advance angle at which the noise of the electric motor 1 is lowest. For this reason, in the advance angle control of the first embodiment, the processing unit 101 of the control device 100 calculates an advance angle that can achieve both efficiency and noise of the electric motor 1 in rated operation, and controls by the advance angle. The electric motor 1 can be operated with high efficiency and low noise.

As described above, the processing unit 101 of the control device 100 corrects the phase shift Δθe by control other than the advance angle control when controlling the electric motor 1. In the example shown in FIG. 6, the detected value SC of the detector 8 whose electrical angle at the zero cross point is θe2, that is, the position of the rotor 10 detected by the detector 8 is delayed in phase from the designed electrical angle θe5. Yes. Therefore, the processing unit 101 handles the detection value SC of the detector 8 whose zero cross point electrical angle is θe2 by advancing the detection value SC by θe2−θe5. Further, the processing unit 101 handles the detection value SC of the detector 8 whose electrical angle at the zero-crossing point is advanced by θe3-θe5, and handles the detection value SC of the detector 8 whose electrical angle at the zero-crossing point is θe4. Is advanced by θe4-θe5 minutes. By such processing, the processing unit 101 can correct the phase shift Δθe of each detector 8 to a design value, so that it is possible to suppress a decrease in efficiency of the electric motor 1 and further suppress noise and vibration. In addition, since the control device 100 can artificially make the variation in the phase shift Δθe difference zero, the electric motor 1 can reduce at least one variation in the maximum output, the efficiency, and the noise due to the phase shift Δθe difference. As a result, the device designed with the lower limit of variation has the advantage that at least one of the maximum output, efficiency and noise of the motor 1 appears to have improved.

The processing unit 101 of the control device 100 may correct the detection value SC of the detector 8 having the phase shift Δθe to the electrical value θe1 of the zero cross point of the induced voltage Ei in addition to correcting the detection value SC to the design value. In this case, the processing unit 101 handles the detection value SC of the detector 8 in which the phase shift Δθe has occurred by advancing the detection value SC by the phase shift Δθe. By such processing, the processing unit 101 can adjust the phase shift Δθe of each detector 8 to the electrical angle θe1 of the zero cross point of the induced voltage Ei, thereby suppressing reduction in efficiency of the electric motor 1 and further noise. And vibration can be suppressed.

In the first embodiment, the processing unit 101 of the control device 100 has the phase shift Δθe of the detector 8 of the phase closest to the design value of the shift between the induced voltage Ei of the winding 22 and the detection value SC of the detector 8. The electric motor may be controlled using the detected value. In the example shown in FIG. 6, since the electrical angle of the design value is θe5, the design value of the deviation between the induced voltage Ei of the winding 22 and the detection value SC of the detector 8 is θe5-θe1. The phase with the phase shift Δθe closest to the design value is the phase with the electrical angle at the zero cross point θe3. As described above, since this phase is the V phase, the processing unit 101 controls the electric motor 1 using the detection value SCv of the V-phase detector 8v. By such processing, the processing unit 101 can control the electric motor 1 using the detection value SC of the detector 8 in which the phase shift Δθe of the detector 8 is closest to the design value, thereby suppressing a decrease in efficiency of the electric motor 1. Furthermore, noise and vibration can be suppressed. Further, since the processing unit 101 can control the electric motor 1 only with the detection value SC of one detector 8, it is possible to avoid erroneously recognizing the variation in the phase shift Δθe of each phase as the rotation unevenness of the electric motor 1. Furthermore, when the processing unit 101 controls the electric motor 1, it is not necessary to correct the detection values SCu, SCv, SCw of the plurality of

detectors

8u, 8v, 8w, so that the processing load can be reduced.

When the phase shift Δθe is a design value, the processing unit 101 of the control device 100 uses an optimum advance angle, that is, an advance angle with the highest efficiency, an advance angle with the least noise, or a high efficiency and low in advance angle control. Control is made so that the lead angle is compatible with noise. In this case, the processing unit 101 can control the electric motor 1 with a more advanced advance angle by controlling the electric motor 1 using the detected value SC of the phase whose phase shift Δθe is closest to the design value. The processing unit 101 can realize at least one of high efficiency of the electric motor 1 and low noise of the electric motor 1.

In the first embodiment, the processing unit 101 of the control device 100 may correct the drive voltage Ed so that the variation of the induced voltage Ei of each phase becomes zero. Specifically, the processing unit 101 decreases the drive voltage Ed applied to the phase with the high induced voltage Ei, and increases the drive voltage Ed applied to the phase with the low induced voltage Ei. As a result, since the processing unit 101 can suppress variations in the induced voltage Ei, it is possible to suppress a decrease in efficiency of the electric motor 1 and further suppress noise and vibration.

The processing unit 101 of the control device 100 may correct the drive voltage Ed so that the variation of the induced voltage constant Ci of each phase becomes zero. Specifically, the processing unit 101 decreases the drive voltage Ed applied to the phase with the large induced voltage constant Ci, and increases the drive voltage Ed applied to the phase with the small induced voltage constant Ci. As a result, since the processing unit 101 can suppress variations in the induced voltage constant Ci, it can suppress a decrease in efficiency of the electric motor 1 and further suppress noise and vibration.

The barcode 4 converted from the information IFm of the electric motor 1 is provided on the outer surface 2S of the housing 2. In the first embodiment, data is directly written on the outer surface 2S of the housing 2 by the laser marker. Since the device information 5 is also written on the outer surface 2S of the housing 2 by the laser marker, the investment in the manufacturing facility for the electric motor 1 can be suppressed by writing the barcode 4 and the device information 5 using the laser marker. The barcode 4 may be printed on a sticker and attached to the outer surface 2S of the housing 2 in addition to being directly written on the outer surface 2S of the housing 2. Next, a method for manufacturing the electric motor 1 will be described.

FIG. 12 is a flowchart showing an example of the method for manufacturing the electric motor according to the first embodiment. FIG. 13 is a diagram illustrating an example of an apparatus for inspecting an electric motor. The method for manufacturing the electric motor according to the first embodiment includes a manufacturing process of the stator 20, a manufacturing process of the rotor assembly, and a manufacturing process of the electric motor 1. Steps S101 to S105 are steps for manufacturing the stator 20, steps S106 to S108 are steps for manufacturing the rotor assembly, and steps S109 to S115 are steps for manufacturing the electric motor 1. In the manufacturing process of the stator 20 and the manufacturing process of the rotor assembly, the former may be the first, the latter may be the first, or both may proceed in parallel.

First, the manufacturing process of the stator 20 will be described. In step S101, electromagnetic steel plates are laminated to produce the stator core 21. In step S102, the stator core 21 and the insulator 23 are integrally molded. In step S103, the winding 22 is wound around each slot of the stator core 21 to manufacture the stator 20. In step S <b> 104, the board holding component is attached to the stator 20. A substrate 9 is attached to the substrate holding component. In step S105, the stator 20, the substrate holding component, and the substrate 9 are integrally molded with resin, so that the stator 20 integrally molded with resin is manufactured.

Next, the manufacturing process of the rotor assembly will be described. In step S106, the permanent magnet 12 is produced. In step S107, the permanent magnet 12, the position detecting magnet 13, and the shaft 3 are integrally formed of resin, and the rotor 10 is manufactured. In step S108, the first bearing 6T and the second bearing 6B are press-fitted into the shaft 3 to produce a rotor assembly.

Next, the manufacturing process of the electric motor 1 will be described. In step S <b> 109, the rotor assembly is inserted into the concave portion of the stator 20 integrally molded with resin, that is, inside the radial direction DR of the stator core 21. Thereafter, the opening of the recess is closed by the bracket 7, whereby the electric motor 1 is manufactured. In step S110, the finished product of the electric motor 1 is inspected. In step S111, when the produced electric motor 1 has passed the inspection of the finished product (step S111, Yes), the process proceeds to step S112. In step S112, the information IFm of the motor 1, that is, the inductance value L of each phase of UVW, the phase shift Δθe, the induced voltage Ei, the induced voltage constant Ci, and the barcode 4 including the winding resistance R are laser markers, and the casing of the motor 1 2 is written on the outer surface 2S. At the same time, the device information 5, that is, the model name, model name, date of manufacture, serial number, and manufacturer of the electric motor 1 is written on the outer surface 2S of the casing 2 of the electric motor 1 with a laser marker. The bar code 4 and the device information 5 are written on the outer surface 2S of the housing 2 to complete the electric motor 1 (step S113).

In the manufacture of the electric motor 1, the process with a long tact time is a process of winding the winding 22 around the stator core 21 and a process of molding the stator 20 or the rotor 10 with resin. Therefore, even if the operation of providing the barcode 4 on the electric motor 1 in the process of writing the device information 5 to the electric motor 1 is added, the tact time is hardly increased. For this reason, in the method for manufacturing the electric motor according to the first embodiment, even if the barcode 4 is provided in the electric motor 1, the manufacturing cost of the electric motor 1 hardly increases. In addition, since the electric motor 1 does not need to have a memory for storing the information IFm, the time for writing the information IFm in the memory and the memory become unnecessary, so that the manufacturing cost and the manufacturing time can be reduced.

When the produced electric motor 1 does not pass the inspection of the finished product (No at Step S111), it is determined whether or not it can be reworked at Step S114. If it can be corrected (step S114, Yes), step S110 and step S111 are repeated. When the produced electric motor 1 cannot be reworked (No at Step S114), the electric motor 1 is discarded at Step S115.

Next, inspection of the finished product will be described. When the electric motor 1 is completed, the following items are mainly inspected or measured. 13 measures the characteristics of the electric motor 1 to be inspected.
(1) Inspection of withstand voltage and insulation resistance.
(2) Capacitance between terminals of the connector 31.
(3) Measurement of winding resistance R and inductance value L between each phase.
(4) Measurement of input current during no-load rotation.
(5) Measurement of frequency and duty (duty) of the input current and the detection value SC of the detector 8 when a load close to actual operation is applied to the motor 1.
(6) Measurement of the induced voltage Ei, the phase shift Δθe, the duty (Duty) of the detection value SC, and the frequency of the detection value SC when the electric motor 1 is rotated by an external force.
(7) Noise inspection.

When rotating the electric motor 1 with external force, the external force driving electric motor 110 shown in FIG. 13 is used. At this time, if the rotation unevenness is large, the accuracy of each measurement value is lowered, and therefore a servo motor is used as the external force driving motor 110. The external force drive motor 110 and the motor 1 need to be connected or disconnected in a short time. Therefore, the chuck 114 is used to connect the shaft 113 of the external force driving motor 110 and the shaft 3 of the motor 1.

As described above, the first embodiment is a process of writing the device information 5 of the motor 1 to the outer surface 2S of the housing 2 in the manufacturing process of the motor 1, and the information IFm of the motor 1 is provided on the outer surface 2S of the housing 2. Little increase in time occurs. As a result, the increase in manufacturing cost of the electric motor 1 is suppressed. In addition, the control device 100 that controls the electric motor 1 can suppress variations in characteristics of the electric motor 1 by using the information IFm of the electric motor 1 by writing the information IFm of the electric motor 1 in the storage unit 102. As a result, the electric motor 1 can realize at least one of reduction in energy consumption, reduction in noise, and increase in output due to higher efficiency.

The electric motor 1 has information IFm such as an inductance value L and a phase shift Δθe on the outer surface 2S of the housing 2. The control device 100 of the electric motor 1 stores information IFm provided on the outer surface 2S of the casing 2 of the electric motor 1 in the storage unit 102 and uses it for control. For this reason, even if it is difficult to take correspondence between the motor 1 and the information IFm of the motor 1 as a result of the difference in the manufacturing location or the manufacturing line between the motor 1 and the apparatus using the motor 1, the control device 100 Can control the electric motor 1 using information IFm about the characteristics of the electric motor 1 provided on the outer surface 2S of the casing 2 of the electric motor 1, thereby reducing the influence of variations in characteristics of the electric motor 1. In the first embodiment, the information holding portion that holds information including the phase difference between the inductance value of the winding 22 and the induced voltage of the winding 22 and the detection value of the detector 8 is a one-dimensional code including the above-described information. Alternatively, it may be a two-dimensional code and is not limited to the barcode 4. The information holding portion is a portion in which information including the inductance value of the winding 22 and the phase shift between the induced voltage of the winding 22 and the detection value of the detector 8 is magnetically written on the outer surface 2S of the housing 2. It may be. The configuration disclosed in Embodiment 1 can be applied as appropriate in the following embodiments.

Embodiment 2. FIG.
In the second embodiment, the electric motor 1 according to the first embodiment is applied to an air conditioner, more specifically, a blower of an outdoor unit.

FIG.14 and FIG.15 is a figure which shows the air conditioning apparatus which concerns on Embodiment 2. FIG. FIG. 16 is a diagram illustrating an air blower of an outdoor unit included in the air-conditioning apparatus according to Embodiment 2. FIG. 17 is a diagram illustrating an outdoor unit of the air-conditioning apparatus according to Embodiment 2. As shown in FIG. 14, the air conditioning apparatus 50 includes an outdoor unit 51 and an indoor unit 52. The outdoor unit 51 has a blower 58. The outdoor unit 51 is installed on the outdoor ground plane FL. The grounding surface FL side of the outdoor unit 51 is downward B, and the side opposite to the grounding surface FL of the outdoor unit 51 is upward A. A lower part B is a direction in which gravity acts. A lid 51UC is provided above the outdoor unit 51.

As shown in FIG. 15, the outdoor unit 51 houses a compressor 53 that is driven by the electric motor Mc and compresses the refrigerant, and a condenser 54 that condenses the refrigerant compressed by the compressor 53. The outdoor unit 51 further includes a blower 58 that blows air to the condenser 54. The blower 58 includes the electric motor 1 and an impeller 58 </ b> B driven by the electric motor 1. The compressor 53 and the condenser 54 are connected by a pipe 57A through which the refrigerant passes.

The indoor unit 52 includes an evaporator 55 that evaporates the refrigerant condensed by the condenser 54. The indoor unit 52 further includes a blower 59 that blows air to the evaporator 55 and an expansion valve 56 that expands the liquid-phase refrigerant condensed by the condenser 54 and flows into the evaporator 55. The blower 59 includes an electric motor Mf and an impeller 59B driven by the electric motor Mf. The condenser 54 and the evaporator 55 are connected by a pipe 57B through which the refrigerant passes. The expansion valve 56 is attached in the middle of the pipe 57B. The evaporator 55 and the compressor 53 are connected by a pipe 57C through which the refrigerant passes.

The electric motor 1 that drives the blower 58 of the outdoor unit 51 is controlled by a control unit 60 shown in FIG. The control unit 60 includes a substrate 60C and a driver 64. The substrate 60C includes a processor 61 such as a CPU, a memory 62 for storing information, and a writing terminal 63 for receiving information written in the memory 62. The driver 64 acquires the drive signal generated by the processor 61 and generates a drive voltage Ed corresponding to the drive signal.

The processor 61 of the control unit 60 corresponds to the processing unit 101 included in the control device 100 according to the first embodiment, and the memory 62 corresponds to the storage unit 102 included in the control device 100 according to the first embodiment. In the second embodiment, the memory 62 is a flash memory, but is not limited to this. The driver 64 of the control unit 60 corresponds to the driver 103 of the first embodiment. The processor 61 of the control unit 60 reads the information IFm of the electric motor 1 from the memory 62 in which the information IFm of the electric motor 1 is written, as in the processing unit 101 of the control device 100 according to the first embodiment, and controls the electric motor 1. Use.

As shown in FIG. 16, the electric motor 1 that drives the impeller 58 </ b> B of the blower 58 supplies power to the signal line 30 and the winding 22 for extracting the detection value SC of the detector 8 shown in FIG. 3. The bar code 4 that is the information IFm of the electric motor 1 is provided on the opposite side of the drawn portion from which the electric wire 32 is drawn. In the electric motor 1, the signal line 30 and the winding 22 are drawn out from the side surface of the housing 2, that is, the surface surrounding the periphery of the shaft 3 of the electric motor 1. Further, the electric motor 1 is provided with a barcode 4 on the side surface of the housing 2.

The electric motor 1 of the blower 58 included in the outdoor unit 51 is housed inside the outdoor unit 51 with the lead-out portion facing downward B in order to suppress flooding from the lead-out portion from which the winding 22 and the electric wire 32 are drawn. Since the electric motor 1 has the barcode 4 on the opposite side of the drawer portion, when the electric motor 1 is accommodated in the outdoor unit 51, the barcode 4 is disposed in the upper part A. With such a structure, even after the electric motor 1 is assembled to the outdoor unit 51, the operator can access the barcode 4 by removing the lid 51UC of the outdoor unit 51 as shown in FIG. . The operator reads the barcode 4 of the electric motor 1 with the barcode reader 65 in a state where the lid 51UC of the outdoor unit 51 is removed, and stores the memory via the terminal 66 of the barcode reader 65 and the writing terminal 63 of the control unit 60. The information IFm of the electric motor 1 can be written in 62.

In Embodiment 2, it is preferable that the barcode 4 and the control unit 60 of the electric motor 1 are arranged at positions facing the lid 51UC of the outdoor unit 51. With such a structure, the barcode 4 and the control unit 60 of the electric motor 1 appear only by removing the lid 51UC, so that the operator can easily read the barcode 4 and write it in the memory 62 of the control unit 60. be able to.

If the barcode 4 is read and written to the memory 62 of the control unit 60 before the electric motor 1 is assembled to the outdoor unit 51, if an unexpected situation such as a stop of a line for manufacturing the electric motor 1 occurs, the memory 62 There is a possibility that the information IFm of the electric motor 1 to be written to the information IFm of the other electric motors 1 is confused. In the second embodiment, after assembling the electric motor 1 to the outdoor unit 51, the operator reads the barcode 4 and writes it in the memory 62 of the control unit 60. For this reason, since the electric motor 1 and the information IFm of the electric motor 1 measured in the inspection process are associated one-to-one, the possibility that the information IFm written in the memory 62 is confused when an unexpected situation occurs is reduced. Is done.

In the second embodiment, the electric motor 1 is applied to the blower 58 of the outdoor unit 51 of the air conditioner 50. However, the application target of the electric motor 1 is not limited to this, and at least the blower 59 and the compressor 53 of the indoor unit 52 are used. One may be sufficient. In addition to the air conditioner 50, the electric motor 1 may be used by being mounted on a ventilation fan, a home appliance, or a machine tool.

The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1 motor, 2 housing, 2S outer surface, 3 shaft, 4 barcode, 5 device information, 6B, 6T bearing, 7 bracket, 8, 8u, 8v, 8w detector, 9 substrate, 10 rotor, 11 insulator, 12 permanent magnets, 13 position detection magnets, 20 stators, 21 stator cores, 22, 22u, 22v, 22w windings, 23 insulators, 30 signal lines, 31 connectors, 32 electric wires, 50 air conditioners, 51 outdoor units , 51UC lid, 52 indoor unit, 58 blower, 58B impeller, 60 control unit, 60C board, 61 processor, 62 memory, 63 writing terminal, 64 driver, 65 barcode reader, 66 terminal, 100 control device, 101 processing Part, 102 storage part, 103 driver, 110 external force drive Motor, 115 measuring device, A upper, B lower, Ci, Ciu, Civ, Ciw induced voltage constant, DR radial direction, Ed, Edu, Edv, Edw drive voltage, Ei, Eiu, Eiv, Eiw induced voltage, Id winding Line current, IFm information, L, Lu, Lv, Lw inductance value, R, Ru, Rv, Rw winding resistance, SC, SCu, SCv, SCw detected value, Δθe phase shift.

Claims

A rotor that rotates about a rotation axis;
A stator having a plurality of windings and disposed outside the rotor in a direction perpendicular to the rotation axis;
A detector for detecting the position of the rotor;
Information holding for storing the rotor, the stator, and the detector, and holding information including an inductance value of the winding and a phase shift between an induced voltage of the winding and a detection value of the detector A housing having a portion;
Including an electric motor.
The information is
The electric motor according to claim 1, further comprising a measured value of an induced voltage of the winding and an induced voltage constant of the winding.
The information is
The electric motor according to claim 1, wherein the electric motor is directly written on the outer surface of the housing.
The housing is
4. The information holding portion according to claim 1, wherein the information holding portion is provided on a side opposite to a portion from which a signal line for taking out a detection value of the detector and a wire for supplying electric power to the winding are drawn. The electric motor according to item 1.
The electric motor according to any one of claims 1 to 4,
A condenser that condenses the refrigerant,
An impeller driven by the electric motor to blow air to the condenser;
A control device for controlling the electric motor using the information stored in the storage device, the storage device storing the information;
An air conditioner outdoor unit.
The control device includes:
The phase shift included in the information controls the electric motor using the detection value of the detector in the phase closest to the design value of the shift between the induced voltage of the winding and the detection value of the detector. The outdoor unit of the air conditioning apparatus of Claim 5.
In a housing that houses a rotor, a stator, and a detector that detects the position of the rotor, an inductance value of the winding of the stator and a phase shift between an induced voltage of the winding and a detection value of the detector An electric motor having an information holding portion for holding information including:
A condenser that condenses the refrigerant,
An impeller that is driven by the electric motor and blows air to the condenser;
The motor is
A signal line for taking out a detection value of the detector and an electric wire for supplying electric power to the winding are arranged with the part drawn out from the housing facing downward and the information holding part facing upward ,
Air conditioner outdoor unit.
A compressor for compressing the refrigerant;
The outdoor unit of the air conditioning apparatus according to any one of claims 5 to 7,
An indoor unit having an evaporator for evaporating the refrigerant condensed by the condenser,
The condenser of the indoor unit condenses the refrigerant compressed by the compressor;
Air conditioner.