CN1585236A - Method and apparatus for magnetizing permanent magnetic motor - Google Patents

Method and apparatus for magnetizing permanent magnetic motor Download PDF

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Publication number
CN1585236A
CN1585236A CNA2004100575363A CN200410057536A CN1585236A CN 1585236 A CN1585236 A CN 1585236A CN A2004100575363 A CNA2004100575363 A CN A2004100575363A CN 200410057536 A CN200410057536 A CN 200410057536A CN 1585236 A CN1585236 A CN 1585236A
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China
Prior art keywords
magnetic
mentioned
rotor
inductance
mutually
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CN100375374C (en
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村上秀树
福原弘之
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

Provided is a magnetizing method and device for a permanent magnet type motor, capable of magnetizing an unmagnetized magnetic member by accurately performing positional matching of a rotor with a stator with a small-sized device even if a compressor has a structure that its inside part is invisible. This method includes a first measuring step for measuring inductance of windings by applying rotor position detection voltage between a first phase winding and a second phase winding among three phase windings, while changing a rotator position; a second measurement step for measuring inductance by applying the rotor position detection voltage between the first phase winding and a third phase winding, while changing the rotator position; a magnetization reference position determining step of determining the position of the rotator relative to the stator as a magnetization reference position, when a majored value by the first measuring step and a majored value by the second measuring step practically becomes the same; and a magnetization step for rotating the rotor by a prescribed angle including 0 degree from the magnetization reference position and magnetizing the unmagnetized magnetic member of the rotor, by applying a current to the winding of a prescribed phase of stator.

Description

Permanent magnet motor magnetism method and device
Technical field
The present invention relates to permanent magnet motor, relate in particular to its rotor magnetism method and magnetic device.
Background technology
Existing permanent magnet motor possesses by the winding on being installed in the stator core that is made of magnetic material energising and produces the stator of rotating magnetic field and rotatably be configured in this stator core, have a rotor of permanent magnet.Permanent magnet motor is for the viewpoint of energy-conservationization, as the motor of for example compressor for use in refrigeration system and be used.
This permanent magnet motor is when assembling, in that rotor is fashionable to the stator interpolation, if the magnetic part of rotor is by magnetic, then rotor can be adsorbed on the inner peripheral surface of stator core because of its powerful magnetic force, thereby locked and can not move, therefore be difficult to rotor is inserted in the stator.
For this reason, the method of Cai Yonging in the past, be to make magnetic part be in not magnetic state ground directly rotor to be inserted in the stator core, insert the back at it and adding magnetic to the winding of stator and produce magnetic field with voltage, by this magnetic field to rotor not the magnetic part of magnetic carrying out magnetic.
In this case, for make rotor not magnetic magnetic part well magnetic, must before magnetic, rotor be rotated with respect to stator, the position with respect to the rotor of stator is overlapped with appointed positions.That is, must so that not the corresponding mode of position of magnetic pole of the part that becomes magnetic pole and the magnetic flux that produces by stator winding of magnetic part of magnetic, the position of rotor is aimed at stator.
As the method for carrying out, had by anchor clamps, visual or location that image processing is carried out, the methods such as mensuration of a certain alternate inductance of location, stator winding by carrying out to the energising of stator winding with respect to the location of the rotor of this stator in the past.
So-called location by carrying out to the energising of stator winding, be meant by adding certain certain voltage to stator winding with constant voltage device etc., make stator core produce stationary magnetic field, by the reluctance torque that generates by this stationary magnetic field the rotor rotation is moved, the method that the position of the magnetic pole of the magnetic pole of rotor and stator core is aligned.
Patent documentation 1 disclose by the mensuration of inductance carry out magnetic potential put the method for location.This method, be under a kind of state after the rotor that makes the magnetic part that has not magnetic with respect to the stator with winding rotatably disposes to not the magnetic part of magnetic carrying out magnetic, make rotor not the magnetic part of magnetic become permanent magnet the permanent magnetism motor magnetism method, and in the method, magnetic potential is put the voltage that detects usefulness to be added on the winding and to produce magnetic flux distribution, inductance between the two ends of the winding when mensuration relatively changes the position with respect to the rotor of magnetic flux distribution is being decided to be magnetic potential with its peak value and is putting.
Patent documentation 1: the spy opens flat 11-243671 communique
But, under situation, exist the problem that the structure so long as not the position relation of the stator that can see compressor inside and rotor just can not position by anchor clamps, visual, location that image processing is carried out.
In addition, under the situation of the location of being undertaken, because the rotor rotation is moved, so the magnitude of current of switching on winding increases by energising.In addition in the method, in order on position alignment, to obtain necessary accuracy, must further increase current value.Like this,, rise and just increase, and equipment capacious also becomes necessaryly simultaneously, and the problem of main equipment must be arranged so exist temperature because the magnitude of current increases.
In addition, in patent documentation 1 disclosed method, even if though have is that compressor inside can not be seen that such structure also can make magnetic potential put the advantage of aligning, but the variable quantity of the inductance value that the rotation by rotor forms with respect to the little situation of the resolution of the machine that it is measured under, comprise the problem of error increase with regard to having in the detection of the angle of the rotor of expression peak value institute.Consequently, under the little situation of the variable quantity of inductance value, just can not detect best magnetic potential and put, can not carry out good magnetic.
Summary of the invention
Therefore, purpose of the present invention, even be to provide structure that a kind of compressor inside can not be seen also can with mini-plant correctly make rotor with respect to position of stator aim at, to not the magnetic part of magnetic carrying out magnetic permanent magnet motor magnetism method and device.
Permanent magnet motor of the present invention magnetism method, be to possess stator with 3 phase windings and have not magnetic magnetic part rotor permanent magnet motor not the magnetic part of magnetic in stator, under rotatable state, carrying out the method for magnetic, it is characterized in that having: while make rotor change in location, winding 3 mutually among the 1st mutually and the 2nd adding between mutually rotor position detection with voltage, measure the 1st determination step of the inductance of winding; Add the 2nd determination step that rotor position detection is used the voltage determination inductance while the change in location that makes rotor mutually and between the 3rd phase the 1st; Will measured value that obtains by the 1st determination step and the measured value that obtains by the 2nd determination step be essentially position when identical with respect to the rotor of stator be decided to be the magnetic reference position magnetic reference position deciding step; Thereby and after making rotor comprise the predetermined angular of 0 degree from magnetic reference position rotation, to the energising mutually of the regulation of the winding of stator to rotor not the magnetic part of magnetic carrying out magnetic the magnetic step.
In addition, permanent magnet motor of the present invention in the magnetism method, by carrying out repeatedly the magnetic step repeatedly, can further improve the magnetic effect.
Permanent magnet motor of the present invention magnetic device, have: the drive unit that is used to make the rotor rotation; Be used to measure the measurement mechanism of the rotation amount of above-mentioned rotor; Be used to measure the inductance determinator of the inductance of stator internal winding group; Be used for to above-mentioned rotor not the magnetic part of magnetic carrying out magnetic the magnetic power supply; And controllably connect above-mentioned drive unit, above-mentioned measurement mechanism, above-mentioned inductance determinator and above-mentioned magnetic power supply, be connected to the control device that can receive in addition from the signal of above-mentioned measurement mechanism and above-mentioned inductance determinator.
The method according to this invention and device, even under the situation of the rotor in can not visual motor with respect to the position relation of stator, also can rotor be aimed at respect to position of stator by small-sized device, well to not the magnetic core component of magnetic carrying out magnetic.
Description of drawings
Fig. 1 is the sectional arrangement drawing that possesses the compressor of permanent magnet motor.
Fig. 2 is the top plan view of the permanent magnet motor of the 1st example.
(a) reaches an example of employed line when (b) being rotor position detection among Fig. 3.
(a) is the figure that expression inductance measured value is shown as the position of minimum rotor among Fig. 4; (b) be the figure that expression inductance measured value is shown as the position of great rotor; (c) be the figure that is illustrated in an example of the magnetic flux distribution that makes its generation in the 2nd inductance mensuration.
Fig. 5 is the curve chart of the measured value of the 1st and the 2nd inductance mensuration.
(a) and (b) reach an example of employed line when (c) being rotor position detection among Fig. 6.
Fig. 7 is the curve chart of relation of the angle of expression inductance measured value and rotor.
Fig. 8 is the figure of another example of the permanent magnet motor of the 1st example.
(a) is the figure of position of the rotor at the intersection point place of expression with high inductance value among Fig. 9; (b) be the figure of position of the rotor at the intersection point place of expression with low inductance value.
Among Figure 10 (a) be magnetic with an example of line; (b) be illustrated in the 1st the figure of situation of the magnetic flux distribution that produces in the magnetic.
Among Figure 11 (a) be magnetic with an example of line; (b) be illustrated in the 2nd the figure of situation of the magnetic flux distribution that produces in the magnetic.
Figure 12 is the top plan view of the permanent magnet motor of the 2nd example.
Figure 13 is the line that produces the distribution of round dot among Figure 10 and fork.
(a) is the figure that expression inductance measured value is shown as the position of minimum rotor among Figure 14; (b) be the figure that expression inductance measured value is shown as the position of great rotor.
Figure 15 is the curve chart of the measured value of the 1st and the 2nd inductance mensuration.
(a) is the figure that expression inductance measured value is shown as the position of minimum rotor among Figure 16; (b) be the figure that expression inductance measured value is shown as the position of great rotor.
Among Figure 17 (a) and (b) be an example of employed line when rotor position detection.
(a) is the figure that expression inductance measured value is shown as the position of minimum rotor among Figure 18; (b) be the figure that expression inductance measured value is shown as the position of great rotor.
(a) is the figure that expression inductance measured value is shown as the position of minimum rotor among Figure 19; (b) be the figure that expression inductance detected value is shown as the position of great rotor.
Figure 20 is the curve chart of the measured value of the 1st and the 2nd inductance mensuration.
(a) is the figure of position of the rotor at the intersection point place of expression with low inductance value among Figure 21; (b) be the figure of position of the rotor at the intersection point place of expression with high inductance value.
Figure 22 be the figure of magnetic with an example of line.
Figure 23 is the figure of the situation of the magnetic flux distribution that produces in the magnetic operation.
Figure 24 is the figure of another example of the permanent magnet motor of the 2nd example.
Figure 25 is the block diagram of the 3rd example.
Among the figure: 1-barrel, 2-permanent magnet motor, 3-compression mechanical part, 4,104-stator, 4a, 104a-winding, 4b, 104b-stator core, 4u, 104u-U phase winding, 4v, 104v-V phase winding, 4w, 104w-W phase winding, 5, the 105-rotor, 5a, 105a-rotor magnetic core, 5b, 105b-not the magnetic part of magnetic, 5d, 105d-magnet jack, 5e, 5eS, 5eN, 105e-permanent magnet.
Embodiment
Below, explain example of the present invention with reference to the accompanying drawing that is added.
The 1st example
＜constitute
Fig. 1 is that expression is equipped with the concise and to the point profile of formation of compressor of the permanent magnet motor of magnetic by method of the present invention, and the top in barrel 1 is disposing permanent magnet motor 2, disposes compression mechanical part 3 in its underpart.
Permanent magnet motor 2 has stator 4 and rotor 5.Stator 4 has stator core 4b and winding 4a, and rotatably disposes rotor 5 in inside.Stator core 4b has the circular thin plate that will be made of many electromagnetic steel plates along the stacked and incorporate tubular of axis direction (above-below direction of barrel 1), is installed on the inwall of barrel 1.
Fig. 2 is the vertical view of formation of the permanent magnet motor of expression the 1st example.
With reference to Fig. 2, on the inner peripheral surface of stator core 4b, being separated by along interior Zhou Fangxiang equally spaced is formed with a plurality of winding insertion section 4c that are made of groove that extend on axis direction.Winding 4a is installed on the 4c of this winding insertion section to concentrate the mode of reeling that the winding (4u, 4v and 4w) of 6 utmost points of 3 phases is reeled.Below, 3 of winding is called U phase, V mutually reaches the W phase mutually.
In addition, rotor 5 have rotor magnetic core 5a, magnet insertion holes 5d and not the magnetic part 5b of magnetic.Rotor magnetic core 5a, the air that is spaced is configured in the central space portion of stator core 4b with gap, and its shape has the tubular that the circular sheet with many electromagnetic steel plate systems is laminated along axis direction.Not the magnetic part 5b of magnetic be inserted among the magnet insertion holes 5d of this rotor magnetic core 5a.Not the magnetic part 5b of magnetic, the rotor 5 of the magnetic part 5a that is being inserted with not magnetic by intercalation in stator 4 time not magnetic.Central part at rotor magnetic core 5a is formed with axle inserting hole (axle the connects patchhole) 5c that connects along its axis direction, is fixed with the bent axle of compression mechanical part in this inserting hole 5c with the intercalation of shrink fit mode.Via this bent axle, permanent magnet motor 2 is driven and is connected on the compression mechanical part 3.
＜magnetism method 〉
Then, on the permanent magnet motor 2 of above-mentioned formation not magnetic magnetic part 5b magnetism method describe.In of the present invention example magnetism method have 2 steps substantially.At first, according to the 1st step, come rotor in the motor in the particular compressor with respect to the relative position of stator by the mensuration of inductance.According to its result, in the 2nd step in the rotor not the magnetic part 5b of magnetic carry out appropriate magnetic.The 1st step is carried out the detection of rotor-position by feeding 2 phase currents.In addition, the 2nd step carry out by 3 phases the energising of magnetoelectricity stream and the rotor realized not the magnetic magnetic part magnetic.
＜measure the rotor position detection carry out by inductance 〉
(measuring the rotor position detection of carrying out by 2 phase inductances)
At first the position probing to rotor describes.Shown in Fig. 3 (a), on the terminal T2 of the terminal T1 of the 1st phase (U phase winding 4u, V phase winding 4v among Fig. 2 or W phase winding 4w) of winding 4a and the 2nd mutually (3 among Fig. 2 mutually in except as any 1 phase of the 1st 12 mutually of selecting mutually in mutually), be connected with inductance meter (LCR instrument) via switch etc.Then, by inductance meter applied voltage between the 1st to the 2nd phase, and measure the 1st inductance simultaneously.At this, the 1st phase terminal T1 side and the 2nd phase terminal T2 side are in a ratio of high potential.
The figure of the example of Fig. 4 (a) magnetic flux that to be expression measure to be produced by the 1st inductance, and establish the 1st and be U phase winding 4u mutually, the 2nd is V phase winding 4v mutually.Round dot among the figure and fork are illustrated in the sense of current that flows of respectively holding up in the portion of each magnetic pole.By this electric current, along having produced magnetic flux by the direction shown in the arrow among the figure.But, flow through 3 phase winding 4u, 4v of this example and the electric current of 4w, when electric current at Fig. 3 (a) and (b) from the outer terminal (T1, T2 or T3) of each phase under the situation that the binding site of 3 phases flows, at Fig. 4 (a) and will be mobile (b) along the direction that shows round dot, fork in the clockwise direction.
Under the state that produces such magnetic flux, when the relative position with respect to stator 4 that makes rotor 5 changed, the value of the inductance of being measured by the 1st inductance meter will change shown in the realization of Fig. 5 like that.At this, transverse axis is represented the relative position with respect to stator 4 of rotor 5, and the relative position relation of 0 degree position rotor 5 and stator 4 is arbitrarily.
Fig. 7 is the curve chart of variation of inductance value of the variation of the expression angle of following rotor 5.In this curve chart, to U phase 4u and V mutually 4v, V phase 4v and W mutually 4w and W phase 4w and U 4u is (with the 1st phase among Fig. 6 (a)～(c), the 2nd mutually and the 3rd be made as U phase 4u, V phase 4v and W phase 4w mutually respectively mutually.) the inductance value of each 2 phase, make that the angle of rotor 5 is each to change small amount, the result of each time mensuration inductance gained makes curve with this.
According to Fig. 7, as the curve 61 to 63 of the line chart of the inductance value of 2 phases arbitrarily of stator winding, have the curve shape of trigonometric function, the angle of its cycle according to rotor 5 is 90 degree, the phase difference that each curve is 61 to 63 is 30 degree.In addition, though the curve of the inductance value of Fig. 7 becomes 90 ° because possessing 4 magnetic poles (magnet insertion holes 5d) according to the angle of rotor, its cycle can change according to the number of magnetic poles (360 ° of ÷ number of magnetic poles) that constitutes rotor.In addition, so-called number of magnetic poles in this explanation is the magnetic pole that means the permanent magnet motor that constitutes the state that is comprising not magnetic.Below explanation, the magnetic pole that utilization will constitute rotor are made as 4 rotor 5 and describe.
The reasons are as follows that inductance value changes like this is described.As shown in Figure 2, the rotor 5 of this example, be internal rotor dispose 4 not magnetic magnetic part 5b, promptly not 4 utmost points structure of the 1/utmost point of magnetic part of magnetic.The most rotor magnetic core that constitutes this rotor 5 is an electromagnetic steel plate, is the material that is easy to by magnetic flux, and is that portion has structure as the cavity of the 5d of magnet insertion holes within it.And, be present in air among the magnet insertion holes 5d and have magnetic susceptibility with the vacuum equal extent, with the electromagnetic steel plate that constitutes rotor magnetic core, being easy to by this point at magnetic flux is the diverse material of character.Therefore, the inductance of winding 4a can change according to the relative position with respect to stator 4 of rotor 5.That is to say that by making rotor 5 rotations, magnet insertion holes 5d hinders the degree of magnetic circuit periodically to change.Even therefore rotor 5 be inserted with 4 not under the state of magnetic part 5b of magnetic, also can be bigger, and can access the variation of same inductance value because of the difference of the magnetic susceptibility of the magnetic susceptibility of residual air and rotor magnetic core.The cycle of this variation inductance is the cycle of 90 degree.In addition, U phase 4u and V be 4v, V phase 4v and W 4w and W phase 4w and the U combination of per 2 phases of 4u mutually mutually mutually, is taken as the configurations that on average differ 60 degree separately.Therefore, between each curve 61 to 63, will show the phase difference of 60 degree.Because the cycle of each curve is 90 degree, phase difference also can show as 30 degree.
In addition, though porose also to exist on the external rotor magnetic core except magnet insertion holes 5d, the rotational symmetry of rotor magnetic core 5a is damaged, as long as this boring ratio is less, is exactly slight to the influence of the inductance value measured, can access same measurement result.And then, even if do not possess 4 of rotor 5 not the magnetic part 5b of magnetic have identical magnetic property such not the magnetic part 5b of magnetic, the state of variation inductance can not change yet.Why say so is to produce because the variation of inductance value is a shape according to the electromagnetic steel plate of rotor 5, so, owing to generally significant difference is arranged for the magnetic susceptibility of air and the magnetic susceptibility of rotor magnetic core 5a, so because of each not the caused influence of performance difference of magnetic part 5b of magnetic to inductance value just faint.In addition, as shown in Figure 8, even with multi-disc not the magnetic part 5b of magnetic (in this figure be 2 not the magnetic part 5b of magnetic) magnet insert under the situation among the magnet insertion holes 5d and also can obtain the same measurement result.
Secondly, to by with added the 1st inductance and measure mutually different constitute 2 of 2 of voltage of usefulness and add the voltages that the 2nd inductance is measured usefulness mutually.For example, be added with outside the 1st inductance measure with voltage be the 1st to reach mutually under the situation of the 2nd phase mutually, employed when this 2nd inductance is measured is exactly the 2nd to reach the 3rd phase or the 1st mutually and reach the 3rd phase mutually mutually.That is to say, magnetic flux that is produced in the 1st inductance is measured and the magnetic flux that is produced in the 2nd inductance is measured are its positions along circumferentially, deflection 60 degree magnetic fluxs clockwise or counterclockwise.
In the 1st inductance is measured, will the 1st be decided to be U phase winding 4u mutually, be decided to be V phase winding 4v mutually as an example the 2nd.As an example, shown in Fig. 3 (b),, connect inductance meter with the 2nd being decided to be V phase winding 4v mutually, will the 3rd being decided to be W phase winding 4w mutually, making the 2nd to be the mode of high potential mutually.
Its result is producing on the motor as using the magnetic flux shown in the arrow among Fig. 4 (c).If magnetic flux that will be produced in Fig. 4 (a) and Fig. 4 (b) and the magnetic flux that is produced in this figure compare, then the directivity with respect to the circumferential magnetic flux of stator and rotor is identical as can be known, only its clockwise deflection in position 60 degree.
If under the state that has produced such magnetic flux, make changing of rotor with respect to the relative position of stator, measure inductance simultaneously, then can as among Fig. 5 by such variation the shown in the dotted line, shown in V-W.Obviously as can be known, in Fig. 5, substantially be similarly to change by the curve chart shown in the solid line with by the curve chart shown in the dotted line, its phase phasic difference 60 degree.
Therefore, in Fig. 5,8 intersection points are arranged by the inductance value shown in the solid line with by the inductance value shown in the dotted line.To be made as the magnetic reference position with the position of these 8 corresponding rotors of intersection point.These 8 intersection points because with respect to the rotor that changes with cycles of 90 degree as the character of magnetic reactance, on the position of clockwise or counterclockwise deflection 60 degree, measure inductance and produce.By resulting maximum value or minimum value of mensuration once and the deviation that has 30 degree apart from its nearest resulting maximum value or minimum value of the mensuration of passing through other.Thus, 2 curved intersections, promptly obtain the point of same inductance value, be located in from a side maximum value or minimum value advance 15 degree, retreat the positions of 15 degree from the opposing party's maximum value or minimum value.
4 intersection points that have higher relatively inductance value among 8 intersection points are positioned at from the angle that the obtains very big inductance value position along once mensuration curve 15 degree angles, and are positioned at the position that retreats 15 degree angles along other mensuration curve.In addition, have 4 intersection points of relatively low inductance value, be positioned at, and be positioned at the position that retreats 15 degree angles along other mensuration curve from the angle that obtains the extra low inductance value, along the position of primary mensuration curve 15 degree angles.
Therefore, among resulting 8 intersection points of 2 times mensuration, have the relative position relation with respect to stator of rotor at 4 intersection point places of higher relatively inductance value, be position as shown in Figure 9.At this, rotor is in from the advance positions of 15 degree of the inverse position hour hands shown in Fig. 4 (b), simultaneously, is positioned at from the position shown in Fig. 4 (c) positions of moving 15 degree clockwise.In this position, 4 of rotor not among the magnetic part 5b of magnetic adjacent 2 not the mid point (mid point in 4 magnetic poles that rotor 5 is had between the adjacent end of 2 adjacent magnetic poles) between the adjacent end of magnetic part 5b of magnetic by by U phase 4u and the W diameter Dwu of the stator 4 of the intermediate point of 4w mutually.
Among resulting 8 intersection points of 2 times mensuration, have relatively low inductance value 4 intersection point places rotor be the position shown in Fig. 9 (b) with respect to the relative position relation of stator.In this position, rotor be in from the inverse position hour hands shown in Fig. 4 (a) advance 15 the degree positions.In this position, diameter Dwu by rotor 4 not among the magnetic part 5b of magnetic mutually 2 of the opposite not the center (in 4 magnetic poles that rotor 5 is had the center of 2 magnetic poles on opposite) mutually of magnetic part 5b of magnetic.
According to the above, by from 32 groups of combination selection selecting 2 different phases mutually, 2 phase inductances of each combination are measured, thereby the rotor when can specific its measured value identical is with respect to the relative position relation of stator.In this example, though be in the 1st inductance is measured, will the 1st to be made as U phase winding 4u mutually, to be made as V phase winding 4v mutually with the 2nd, in the 2nd inductance is measured, will the 1st be made as V phase winding 4v mutually, be made as W phase winding 4w mutually the 2nd, even but in other combination, also can carry out similar detection, therefore by 2 times inductance measure be can certain rotor the position relation with respect to stator.
Promptly, if in the 1st inductance is measured, carry out the 1st mutually and the 2nd mutually 2 phase inductances mensuration, and then in measuring, the 2nd inductance carries out the 2nd mutually and the 3rd mutually 2 phase inductances mensuration, then in 2 inductance are measured, have among 8 rotor-positions of identical inductance value, 4 rotor-position places with higher relatively inductance value, 4 of these of rotor not among the magnetic part 5b of magnetic adjacent 2 not the mid point (mid point in 4 magnetic poles that rotor 5 is had between the adjacent end of 2 adjacent magnetic poles) between the end of adjacency of magnetic part 5b of magnetic, be positioned at by the 3rd mutually with the 1st mutually the diameter of stator of intermediate point on.On the other hand, at 4 rotor-position places with inductance value relatively low among 8 inductance value, 4 of these of rotor not among the magnetic part 5b of magnetic mutually 2 of the opposite not the center (in 4 magnetic poles that rotor 5 is had the center of 2 magnetic poles on opposite) mutually of magnetic part 5b of magnetic, be positioned at by the 3rd mutually with the 1st mutually the diameter of stator of intermediate point on, in addition, 4 not among the magnetic part 5b of magnetic with above-mentioned 2 not the magnetic part 5b of magnetic different in addition 2 not the magnetic part 5b of magnetic (in 4 magnetic poles that rotor 5 is had different 2 magnetic poles in addition) with 2 magnetic poles on above-mentioned mutual opposite be positioned at the right opposite of the magnetic pole of the 2nd phase.
Perhaps, if in the 1st inductance is measured, carry out the 1st mutually and the 2nd mutually 2 phase inductances mensuration, and then in the 2nd inductance is measured, carry out the 3rd mutually and the 1st mutually 2 phase inductances mensuration, then in 2 inductance are measured, have among 8 rotor-positions of identical inductance value, 4 rotor-position places with higher relatively inductance value, 4 of these of rotor not among the magnetic part 5b of magnetic adjacent 2 not the mid point (mid point in 4 magnetic poles that rotor 5 is had between the adjacent end of 2 adjacent magnetic poles) between the end of adjacency of magnetic part 5b of magnetic, be positioned at by the 2nd mutually with the 3rd mutually the diameter of stator of intermediate point on.On the other hand, at 4 rotor-position places with inductance value relatively low among 8 inductance value, 4 of these of rotor not among the magnetic part 5b of magnetic mutually 2 of the opposite not the center (in 4 magnetic poles that rotor 5 is had the center of 2 magnetic poles on opposite) mutually of magnetic part 5b of magnetic, be positioned at by the 2nd mutually with the 3rd mutually the diameter of stator of intermediate point on, in addition, 4 not among the magnetic part 5b of magnetic with above-mentioned 2 not the magnetic part 5b of magnetic different in addition 2 not the magnetic part 5b of magnetic (in 4 magnetic poles that rotor 5 is had different 2 magnetic poles in addition) with 2 magnetic poles on above-mentioned mutual opposite be positioned at the right opposite of the magnetic pole of the 1st phase.
As mentioned above, measure, and the rotor-position of specific 2 times measured value unanimity, thereby can grasp the relative position relation with respect to stator of rotor by 2 phase inductances that carry out 2 times.In addition, in twice mensuration, owing to be the mensuration of carrying out inductance value along with the rotation of rotor continuously, and detect its intersection point, so its precision is very high,, also can determine rotor-position accurately even especially under the situation of the deficient change of the inductance value of the rotation of following rotor.
＜rotor not the magnetic magnetic part magnetic
(by 3 phases rotor that magnetoelectricity stream carries out not the magnetic magnetic part magnetic)
Then describe facing to magnetism method.Grasped the relation with respect to the relative position of stator of rotor by above-mentioned method after, carry out as described below rotor not the magnetic magnetic part magnetic.
This example magnetism method, by the 1st magnetic and the 2nd magnetic 2 roads the magnetic operation make rotor not the magnetic part 5b magnetization of magnetic.The 1st in the magnetic, to will be arbitrarily among 3 phase windings of stator 2 mutually a side be made as high potential, and make direct current that magnetic uses arbitrarily 2 mutually and remaining 1 mobile in mutually.Figure 10 (a) expression the 1st the line during magnetic be 2 to be decided to be mutually and the 1st to reach the 3rd phase mutually, 1 of remainder is decided to be the 2nd phase mutually arbitrarily.Then, the 2nd in the magnetic, will be arbitrarily 2 mutually a side be made as electronegative potential, and make direct current that magnetic uses among 3 phase windings of stator arbitrarily 2 mutually and remaining 1 mobile in mutually.In addition, the 1st 2 phases arbitrarily during magnetic selection with the 2nd 2 mutually the relations of selection arbitrarily during magnetic be independently, can freely select.Figure 11 (a) expression the 2nd the line during magnetic be with arbitrarily 2 be decided to be mutually the 1st mutually with the 2nd mutually, 1 of remainder is decided to be the 3rd phase mutually.According to the result who measures the rotor position detection that draws by above-mentioned inductance, the 1st and the 2nd in each of magnetic, by rotor is located rightly just can make rotor not magnetic magnetic part 5b rightly magnetic.
With reference to Figure 10 (b), to the 1st magnetic describe.Figure 10 (b) be illustrated in the 1st the figure of position of the magnetic flux that produced in the magnetic and rotor.In this figure, the 1st phase among Figure 10 (a), the 2nd phase and the 3rd are decided to be U phase winding 4u, V phase winding 4v and W phase winding 4w mutually respectively.The position of rotor 5 shown in Fig. 9 (b), be in the example of the rotor position detection of being undertaken by 2 above-mentioned phase inductances, the position of intersection point of expression with relatively low inductance value.The 1st in the magnetic, so that 4 of rotor not among the magnetic part 5b of magnetic relative arbitrarily 2 not the mode of right opposite of the magnetic part 5b of magnetic (1 in the magnetic pole that had of the rotor 5 arbitrarily) electrode that is being positioned on the magnetic line, forming by a winding that is positioned at low potential side, make the rotor location.Even under the different situation in the position of rotor 5, because the information relevant with the relative position relation with respect to stator 4 of rotor 5 is known, so as long as make the necessary degree of rotor 5 rotations according to this information.
Making rotor 5, magnetic is flowed into shown in Figure 10 (a) with electric current with after the illustrated position alignment of leading portion.Can be created among Figure 10 (b) by the magnetic flux shown in the arrow, with respect to the right opposite that is positioned at the magnetic pole that forms by V phase winding 4v not the magnetic part 5b of magnetic, magnetic flux vertically connects along the direction from the center, lateral.Therefore, this not the magnetic part 5b of magnetic be the S utmost point and with the outside by magnetic.After, with the outside S utmost point and be called permanent magnet 5eS with this by 2 magnetic parts of magnetic.With respect to 2 beyond the permanent magnet 5eS not the magnetic part 5b of magnetic, magnetic flux connects laterally from the inboard obliquely.Therefore, these 2 not the magnetic part 5b of magnetic be the N utmost point and with the outside by magnetic.After, with the outside N utmost point and be called permanent magnet 5eN with this by 2 magnetic parts of magnetic.Permanent magnet 5eN the magnetic degree with the outside be the S utmost point and a little less than being compared by 2 permanent magnet 5eS of magnetic, especially near the region R 1 that is represented by dotted lines not by fully magnetic.
Then, for compensate the 1st between permanent magnet 5eS in the magnetic and the 5eN magnetic degree unbalanced, carry out the 2nd magnetic.The 2nd during magnetic the magnetic line shown in Figure 11 (a), hot side is made as 1 phase, low potential side is made as 2 phases.With the 1st phase, the 2nd mutually and the 3rd be decided to be U phase winding 4u, V phase winding 4v and W phase winding 4w mutually respectively, on Figure 11 (b), be illustrated in the 2nd the magnetic flux that produces in the magnetic and the position of rotor 5.
Rotor 5 begins to rotate counterclockwise 30 degree from the position of Figure 10 (b).Since the 1st magnetic stop time to the 2 during magnetic between rotor 5 necessity amount of movement by the 1st magnetic line and the 2nd the relation decision of line of magnetic.The 2nd in the magnetic, to rotor be configured so that the 1st in the magnetic the more weak permanent magnet (being rescue magnet 5eN in this example) of magnetic be positioned at by the 2nd the line of magnetic become the right opposite of a magnetic pole that forms mutually of hot side.
Making rotor, magnetic is flowed as Figure 11 (a) with electric current with after the illustrated position alignment of leading portion.Be created in magnetic flux indicated by the arrow among Figure 11 (b), with respect to the permanent magnet 5eN of the right opposite that is positioned at the magnetic pole that is formed by W phase winding 4w, magnetic flux is vertically along the direction in outside perforation mutually from central division.Therefore, permanent magnet 5eN with the outside be the N utmost point and by magnetic.Though this permanent magnet 5eN the 1st in the magnetic especially central part not by well magnetic, by the 2nd magnetic, the permanent magnet 5eN that comprises region R 1 also has been carried out sufficient magnetic.
＜effect 〉
Measure by the inductance that carries out 2 times, and according to the relative position relation with respect to stator 4 of the position certain rotor 5 of the rotor 5 of 2 times measured value unanimity, even motor 2 is the structures that can not detect the position of rotor 5 with optical mode, also can rotor 5 be aimed at respect to position of stator with mini-plant, then by 2 times the magnetic operation can in the rotor 5 not the magnetic part 5b of magnetic carry out good magnetic.Thus,, then can expect to obtain stable magnetic effect, can make to high level the stable performance of permanent magnet motor if carrying out the permanent magnet motor of magnetic by magnetism method of the present invention.
The 2nd example
In the 1st example to stator winding under the situation of concentrate reeling magnetism method be illustrated, and this explanation reel to distributing stator that ground constitutes magnetism method.Figure 12 be expression in the 2nd example the vertical view of formation of magnetic object permanent magnet motor.The formation of this example is except the inside formation of the motor shown in Figure 12 102, identical with the 1st example.
＜constitute
If with reference to Figure 12, Zhou Fangxiang is separated by and equally spaced is formed with a plurality of winding insertion section 104c that are made of groove that extend along axis direction in the inner peripheral surface upper edge of stator core 104b.Winding 104a, the mode of disperseing to reel with 4 utmost point windings (104u, 104v, 104w) with 3 phases is installed among these 24 winding insertion section 104c by coiling.Below, be called U phase, V phase, W phase mutually with 3.Round dot shown in the figure and fork, the expression sense of current of each phase winding 104u, 104v and 104w of flowing through when electric current is arranged that flows in each phase, sense of current is for the 1st phase among Figure 13, the 2nd mutually and the direction under the 3rd the situation when being decided to be U phase winding 104u, V phase winding 104v and W phase winding 104w mutually respectively.
In addition, rotor 105 have rotor magnetic core 105a and not the magnetic part 105b of magnetic.Rotor magnetic core 105a is provided in the central space portion of stator core 104b with separating spatial joint clearance, and its shape has the tubular that multi-disc electromagnetic steel plate round thin plate is laminated along axis direction as magnetic material.Not magnetic magnetic part 105b with not the state of magnetic be inserted in the magnet insertion holes 105d of this rotor magnetic core 105a.In addition, not the magnetic part 105b of magnetic have shape to the central part bending of rotor 105,4 not the magnetic part 105b of magnetic have identical magnetic characteristic.Be formed with the axle inserting hole 105c that connects along its axis direction on the central part of rotor magnetic core 105a.Fixing the bent axle of compression mechanical part among this inserting hole 105c with the intercalation of shrink fit mode.Via this bent axle, permanent magnet motor 102 is driven and is connected on the compression mechanical part 3.
＜magnetism method 〉
Then, in the permanent magnet motor 102 of said structure not magnetic magnetic part 105b magnetism method describe.In of the present invention example magnetism method also same with the 1st example, be divided into 2 steps substantially, at first, by the 1st step, come the relative position with respect to stator 104 of the rotor 105 in the motor 102 in the particular compressor according to the mensuration of inductance.According to its result, in the 2nd step, in the rotor 105 not the magnetic part 105b of magnetic carry out appropriate magnetic.The 1st step has rotor position detection of carrying out according to 2 phase currents and the 2 kinds of such method for detecting position of rotor position detection that carry out according to 3 phase currents.In addition, the 2nd step have by 2 phases rotor that magnetoelectricity stream carries out not magnet assembly magnetic and by 3 phases rotor that magnetoelectricity stream carries out not magnet assembly magnetic such 2 kinds magnetism method.The selection of these 2 kinds of methods is freely.Thus, this method have amount to 4 kinds magnetism method.
＜measure the rotor position detection carry out by inductance 〉
(measuring the rotor position detection of carrying out by 2 phase inductances)
To measure the rotor position detection carry out the same with 2 phase inductances that pass through in the 1st example, at first, select 2 phases arbitrarily from 3 mutually, for example select the 1st phase and the 2nd phase, at this 2 alternate feeding inductance mensuration electric current, record is because of the variation (the 1st inductance mensuration) of the inductance value of the rotation generation of rotor 105.Secondly, will be in the 1st inductance is measured used 21 phase, the 2nd phases for example among mutually, with in the 1st inductance is measured non-selected 1 mutually, i.e. the 3rd replacement mutually.If the 1st and the 2nd compares comparatively high (low) current potential side in the 1st inductance is measured, then in this mensuration so that the 1st and the 3rd compare the mode that becomes low (height) current potential side and feed inductance and measure and use electric current, record is because of the variation (the 2nd inductance mensuration) of the inductance value of the rotation generation of rotor 105.Measure and during the 2nd inductance measures at the 1st inductance, the magnetic flux that mensuration is separately produced when flowing with electric current be in by clockwise or rotate counterclockwise 60 degree can consistent relation.
Rotor 105 not the shape of magnetic part 105b of magnetic, though with the 1st example in not the shape of magnetic part 5b of magnetic different, be to become protruding shape to center curvature, the periodicity when measuring for inductance does not have difference.That is to say that the cycle with 90 degree changes inductance value along with the rotation of rotor 105.Its curve chart has position of a relative maximum and minimal point left-right symmetric.In addition, the 1st inductance is measured the maximal point and the minimal point of curve chart, and the maximal point and the immediate point among the minimal point of the curve chart of measuring with the 2nd inductance differ 30 degree respectively.Therefore, the point of the measured value unanimity that 2 times inductance is measured has 8 in rotor revolves the interval of three-sixth turn, and wherein 4 is to compare the point with relative higher inductance value with other 4, and other 4 are the points with relatively low inductance value.
The same with the position probing in the 1st example, in measuring, 2 times inductance have the position of the rotor of same inductance value, and relevant with the relative position with respect to stator of rotor, have common relation property.Below, the 1st phase, the 2nd phase and the 3rd are decided to be U phase winding 104u, V phase winding 4v and W phase winding 4w mutually respectively, the example of expression rotor position detection, but in U phase winding, V phase winding or the W phase winding which is decided to be the 1st phase, equally which is decided to be the 2nd phase, the 3rd phase, be not limited to above-mentioned example, other combination also is obvious and is possible.
Below specifically describe.At first, carrying out the 1st inductance measures.If line and voltage shown in Fig. 3 (a), then can produce Figure 14 (a) and (b) in by the magnetic flux shown in the arrow.In this Figure 14 (a) expression is the position of the inductance value the measured rotor 105 when being minimum.At this moment, 4 not among the magnetic part 105b of magnetic adjacent 2 not the mid point (mid point in 4 magnetic poles that rotor 5 is had between the adjacent end of 2 adjacent magnetic poles) between the adjacent end of magnetic part 105b of magnetic, be arranged in by on the diameter D of the stator 104 at the center of a series of round dot of 2 phases that are in above-mentioned galvanization on the stator 104 or fork.Figure 14 (b) expression be the position of the inductance value the measured rotor 105 when being maximum.At this moment, rotor 105 is positioned at from the position of the rotation of the position shown in Figure 14 (a) 45 degree.In addition, the solid line of Figure 15 is represented the measurement result that the 1st inductance is measured.Transverse axis with rotor-position arbitrarily be decided to be 0 when spending, apart from the anglec of rotation of this position.
Secondly, carrying out the 2nd inductance measures.If line and voltage shown in Fig. 3 (b), then can produce Figure 16 (a) and (b) in by the magnetic flux shown in the arrow.In this Figure 16 (a) expression is the position of the inductance value the measured rotor 105 when being minimum.At this moment, rotor 105 is measured the same with the 1st inductance, 4 of rotor 105 not among the magnetic part 105b of magnetic adjacent 2 not the mid point (mid point in 4 magnetic poles that rotor 5 is had between the adjacent end of 2 adjacent magnetic poles) between the adjacent end of magnetic part 105b of magnetic, identical with the situation of Figure 14 (a), be arranged in by on the diameter of the stator 104 at the center of a series of round dot of 2 phases that are in above-mentioned galvanization on the stator 104 or fork.Figure 16 (b) expression be the inductance value the measured rotor-position when being maximum.This moment, rotor 105 was positioned at the position after 45 degree of the rotated position shown in Figure 16 (a).The measurement result that the 2nd inductance is measured dots in Figure 15.Can find 8 intersection points by Figure 15.To be decided to be the magnetic reference position with the position of these 8 corresponding rotors 105 of intersection point.To the position of the rotor 105 at these 8 intersection point places, in following explanation.
At 4 intersection point places with the relatively low inductance value shown in Figure 15, the position that rotor 105 is in from Figure 14 (a) rotates counterclockwise the position of 15 degree or the position that the position from Figure 16 (a) clockwise rotates 15 degree.
At 4 intersection point places with the higher relatively inductance value shown in Figure 15, rotor 105 is in position from Figure 14 (b) and rotates counterclockwise position or the position after the position of Figure 16 (b) clockwise rotates 15 degree after 15 degree.
Like this, the position by making rotor 105 with measure resulting identical measured value point by 2 times 2 phase current inductance and match, just can correctly hold the relative position with respect to stator 104 of rotor 105.In addition, even when measuring, under the combination of the employed phase situation different,, can correctly hold the relative position with respect to stator 104 of rotor 105, be obvious and possible by same mensuration with this example.
(measuring the rotor position detection of carrying out by 3 phase inductances)
Pass through rotor position detection that 2 phase currents carry out similarly with above-mentioned, the rotor position detection of being undertaken by 3 phase currents also is possible.
This detection be by the 1st inductance measure and the 2nd inductance measure 2 times such inductance measure grasp rotor 105 with respect to the relative position relation of stator 104.In the 1st inductance is measured, shown in Figure 17 (a), 3 mutually in, carry out line to be made as high potential mutually and to reach the 3rd mode that is made as electronegative potential mutually mutually with the 2nd with the 1st, rotor is rotated measures inductance.In the 2nd inductance is measured, shown in Figure 17 (b), the 2nd phase (or the 3rd phase) is made as high potential and the 3rd phase (or the 2nd phase) and the 1st mode that is made as electronegative potential are mutually carried out line, while make rotor 105 rotations measure inductance.In the 1st inductance mensuration and the 2nd inductance mensuration, the magnetic flux that mensuration is separately produced when flowing with electric current is in the relation that gets final product unanimity by edge clockwise (or counterclockwise) rotation 60 degree.
To make actually the 1st phase, the 2nd mutually and the 3rd corresponding with 3 of stator winding in mutually which be arbitrarily, but below as an example, mutually and the 3rd be made as U phase winding 104u, V phase winding 104v and W phase winding 104w mutually respectively and describe with the 1st phase, the 2nd.
At first, carrying out the 1st inductance measures, if being that U phase winding 104u is made as hot side and is that V phase winding 104v and the 3rd is that the mode that W phase winding 104w is made as low potential side is carried out line mutually mutually with the 2nd mutually with the 1st, and voltage, then can produce as Figure 18 (a) and the magnetic flux (b).Figure 18 (a) expression be the position of the inductance value the measured rotor 105 when being minimum.At this moment, 4 not among the magnetic part 105b of magnetic adjacent 2 not the mid point (mid point in 4 magnetic poles that rotor 5 is had between the adjacent end of 2 adjacent magnetic poles) between the adjacent end of magnetic part 105b of magnetic, identical with the situation of Figure 14 (a), be positioned on the diameter of stator 104 of mid point of the adjacent round dot of the U phase winding 104u by stator 104 or fork.Figure 18 (b) expression be the inductance value the measured rotor-position when being maximum.This moment, rotor 105 was positioned at from the position of 45 degree of the rotated position shown in Figure 18 (a).
Secondly, carrying out the 2nd inductance measures.If being that V phase winding 104v is made as hot side and is that W phase winding 104w and the 1st is that the mode that U phase winding 104u is made as low potential side is carried out line mutually mutually with the 3rd mutually with the 2nd, and voltage, then can produce as Figure 19 (a) and the magnetic flux (b).Figure 19 (a) expression be the position of the inductance value the measured rotor 105 when being minimum.At this moment, 4 of rotor 105 not among the magnetic part 105b of magnetic adjacent 2 not the mid point (mid point in 4 magnetic poles that rotor 5 is had between the adjacent end of 2 adjacent magnetic poles) between the adjacent end of magnetic part 105b of magnetic, situation as Figure 14 (a) is identical, is positioned on the diameter of stator 104 of mid point of the adjacent round dot of the V phase winding 104v by stator 104 or fork.Figure 19 (b) expression be the inductance value the measured rotor-position when being maximum.This moment, rotor was positioned at the position after 45 degree of the rotated position shown in Figure 19 (a).Figure 20 draws that the 1st inductance is measured and the curve chart of the gained as a result that the 2nd inductance is measured on one side.Solid line is represented the result that the 1st inductance is measured, and dotted line is represented the result that the 2nd inductance is measured.Transverse axis is that rotor-position arbitrarily is decided to be 0 the anglec of rotation apart from the rotor 105 of this position when spending.8 intersection points will be decided to be the magnetic reference position with the position of these 8 corresponding rotors 105 of intersection point as seen from Figure 20.For the position of the rotor at these 8 intersection point places, in following explanation.
In Figure 20, at 4 intersection point places with relatively low inductance value, rotor 105 shown in Figure 21 (a), is arranged in the position that rotates counterclockwise 15 degree from the position of Figure 18 (a), just is arranged in the position that clockwise rotates 15 degree from the position of Figure 19 (a).
In Figure 20, at 4 intersection point places with higher relatively inductance value, rotor 105 shown in Figure 21 (b), is arranged in the position that rotates counterclockwise 15 degree from the position of Figure 18 (b), just is arranged in the position that clockwise rotates 15 degree from the position of Figure 19 (b).
Like this, the position by making rotor 105 with measure resulting same measured value point by 2 times 3 phase current inductance and match, just can correctly grasp the relative position with respect to stator 104 of rotor 105.In addition, even under the combination of the measuring employed phase situation different with this example, by same mensuration, the relative position with respect to stator 104 of correctly grasping rotor 105 is obvious and possible.
＜rotor not the magnetic magnetic part magnetic
In this example, to not the magnetic part 105b of magnetic carrying out the method for magnetic, the method for utilizing 2 phase currents is arranged and utilizes these 2 kinds of methods of method of 3 phase currents.Two kinds of methods all are the grasps that concern based on about the position by resulting rotor 105 of rotor position detection and stator 104, by making rotor 105 rotate to the position of being convenient to magnetic in advance with respect to feeding magnetoelectricity formed magnetic flux of when stream, and carrying out magnetic, thereby realize good magnetic.
(by 2 phases rotor that magnetoelectricity stream carries out not the magnetic magnetic part magnetic)
In this example magnetic, with in the 1st example magnetic different, its by 1 time the magnetic operation so that rotor not the magnetic part 105b of the magnetic mode that becomes permanent magnet 105e to not the magnetic part 105b of magnetic magnetize.Below, to describing, representing an example of magnetic operation in line with magnetism method.
Between 2 phases among 3 phases, feeding the direct current that magnetic is used.If considering magnetic again with the directivity of direct current, then have this moment 6 kinds the magnetic electric current.The distribution shape of 6 kinds of electric currents formed magnetic flux in rotor 105, be have identical 2 rotational symmetries, promptly with respect to central point have 180 the degree periodic shapes, they are the directivity difference separately.Though the shape of 6 kinds of magnetic flux distribution itself is identical, the center that the directivity that distributes has respectively with rotor 105 and stator 104 is the such distribution shapes of each self-deflection 30 degree of axle.
Be on earth from 6 kinds among the energising direction of magnetic with electric current, select for use any magnetic electricity consumption stream carrying out magnetic, magnetic and freely select appropriate magnetoelectricity to flow as long as consider each with the position of the directivity of the magnetic flux distribution that electric current produced and rotor.
An example of magnetic as 2 phases, is that U phase winding 104u and the 3rd is W phase winding 104w mutually to the 1st mutually, is made as hot side mutually and applied voltage is feeding the magnetic electric current with the 1st, attempts carrying out magnetic.
At this moment, magnetic and flow as shown in Figure 22 with electric current, magnetic flux shown in arrow among Figure 23 like that in the drawings from left and right directions incident, in motor, be branched off into 2 directions, formation bends to protruding magnetic flux to central part, is flowed out to the motor outside by top among the figure and bottom.
At this moment, as long as in advance with rotor 105 not magnetic magnetic part as illustrated in fig. 23, even 4 not the formed cross of the magnetic part 105b of magnetic (4 magnetic poles that rotor 105 is had) be adjusted to the position that 45 degree tilt in the drawings, just can carry out good magnetic, obtain to be carried out good the permanent magnet 105e of magnetic.Because the relative position relation of rotor 105 and stator 104 is already to know by the position probing of carrying out according to inductance value, so make rotor 105 carry out carrying out magnetic again after the necessary rotation in order to carry out good magnetic.Obviously can carry out as follows, according to the relevant information in position by the resultant rotor of position probing that carries out according to inductance value, rotor-position is matched with the rotor-position that has identical inductance value in the inductance mensuration that is used for position probing, considering on one side not that in this position the quilt of the magnetic part 105b of magnetic the magnetic of magnetic, on one side with the mode that can carry out good magnetic select to feed magnetoelectricity stream 2 mutually and senses of current.
(by 3 phases rotor that magnetoelectricity stream carries out not the magnetic magnetic part magnetic)
Except above-mentioned by 2 phases that magnetoelectricity stream carries out the magnetic, by 3 phase currents carry out magnetic also be fine.In line with the magnetic operation also with the 1st example in the magnetic operation different, its magnetic operation by 1 road so that rotor 105 not the magnetic part 105b of the magnetic mode that becomes permanent magnet 105e to not the magnetic part 105b of magnetic magnetize.Below, to describing in line with magnetism method.
Carry out line in the mode that is made as low potential side (or hot side) that 3 of stator 1 is made as hot side (or low potential side) among mutually arbitrarily mutually, 2 of remainder is in parallel, feeding the direct current that magnetic is used.At this moment because the method for line has 6 kinds, so have 6 kinds the magnetic electric current.The distribution shape of 6 kinds of electric currents formed magnetic flux in rotor 105 be identical, have 2 rotational symmetries, promptly have the periodic shapes of 180 degree and their directivity differences separately with respect to central point.The shape of 6 kinds of magnetic flux distribution itself is identical, but the center that the directivity that distributes has respectively with rotor 105 and stator 104 is the distribution shape of each self-deflection 30 degree of axle.
The electric current formed magnetic flux distribution of magnetic by 3 phases, is identical with the electric current formed magnetic flux distribution of magnetic by 2 phases of this example in essence, but its distributing position, with by 2 mutually the position of the electric current formed magnetic flux distribution of magnetic 15 degree that stagger separately respectively.
Thereby,, can produce 12 kinds of magnetic flux distribution at interval with 15 degree by also magnetic with 2 phases.
Be on earth from 6 kinds 2 phases magnetoelectricity stream 6 kinds 3 phases and select for use any magnetoelectricity stream carrying out magnetic the magnetoelectricity stream, as long as by consider separately magnetic freely select appropriate magnetoelectricity to flow with the position of the directivity of the formed magnetic flux distribution of electric current and rotor.The position of magnetic flux that when magnetic, produces and the rotor 105 that should choose and by magnetic not the relation property of polarity of magnetic part 105b of magnetic, magnetic identical with 2 phases of this example.
＜effect 〉
Measure by the inductance that carries out 2 times, and according to the relative position relation with respect to stator 104 of the position certain rotor 105 of the rotor 105 of 2 times measured value unanimity, even motor 102 is can not be with the structure of the position of optical mode detection place rotor 105, also can correctly make rotor 105 with respect to stator 104 position alignment with mini-plant, then by 1 time the magnetic operation just can in the rotor 105 not the magnetic part 105b of magnetic carry out good magnetic.Thus, if carrying out the permanent magnet motor of magnetic, then can expect to obtain stable magnetic effect, and can make to high level the stable performance of permanent magnet motor by magnetism method of the present invention.
In addition, as shown in figure 24, with many not the magnetic part 105b of magnetic (in this figure be 3 not the magnetic part 5b of magnetic) insert when constituting 1 magnetic pole among 1 magnetite patchhole 105d, also identical, the position of certain rotor 105 exactly, to not the magnetic part 105b of magnetic carrying out well magnetic.
The 3rd example
According to the method that the 1st example and the 2nd example are put down in writing, constitute to the rotor of motor not the magnetic part of magnetic carrying out the device of magnetic.
＜constitute
Figure 25 is the block diagram of the formation of this device of expression.Via the electrode 211 that is configured in compressor top, 3 phase windings in the stator and as the inductance meter 212 of inductance determinator and as magnetic device magnetoelectricity source 213 be connected.A plurality of switches suitably are set in its path, thus can be to the desirable electric current that feeds mutually.Switch also can be the switch that can open and close by the control device 214 as control unit.
In addition, inductance meter 212 and magnetoelectricity source 213 be connected on the control device 214.Control device 214 can control inductance meter 212 and magnetoelectricity source 213.Simultaneously, control device 214 can control from compressor below via axle with rotor linking as the rotary encoder 215 of drive unit and the impulse motor 216 that can drive rotary encoder 215.In addition, even if the drive unit manpower also can, in this case, can on axle etc., engrave the scale that can read rotation amount etc., measure rotation amount, thereby manually be input in the control device 214.
＜action 〉
Control device 214 drives impulse motor 216.The actuating force of impulse motor 216 is delivered to rotary encoder 215, and then makes the rotor rotation of motor via axle.Rotary encoder 215 sends to rotation amount control device 214 one by one.Simultaneously, inductance meter 212 carries out the mensuration of inductance continuously under the control of control device 214, its result is sent to control device 214.Control device 214 utilizes information relevant with the rotation amount of the rotor of sending here from rotary encoder and the measured value of sending here from inductance meter, the corresponding inductance value of rotation amount of record and rotor.
Then, control device 214 utilizes the relative position with respect to stator of the method grasp rotor among the present invention.Then by control device 214 carry out rotor magnetic.Control device 214 is determining the magnetic electric current, makes the angle of rotor rotation regulation if the rotation of rotor is necessary, is implementing magnetic then.Feeding the combination of phase of magnetoelectricity stream and the decision of the number of phases, can be that control device 214 automatically determines, also can be that the user of this device manually indicates control device 214 in addition.Automatically determining at control device 214 under the situation of magnetoelectricity stream, also can be redefined for the position of considering rotor, adopt and rotation amount can be suppressed as much as possible to be minimum magnetoelectricity stream.
＜effect 〉
According to this device, can be by the unusual structure of miniaturization, implement permanent magnet motor not the magnetic magnetic part magnetic.
Permanent magnet motor of the present invention magnetism method and device, even if having under the state that motor interior can't be seen, also can by small-sized equipment correctly make rotor with respect to position of stator aim at, to not the magnetic part of magnetic carrying out the profitability of magnetic, for example as aircondition with the permanent magnet motor of compressor magnetism method and device very effective.

Claims (9)

  1. A permanent magnet motor magnetism method, this method be to possess stator with 3 phase windings and have not magnetic magnetic part rotor permanent magnet motor above-mentioned not the magnetic part of magnetic, in said stator, carrying out the method for magnetic with rotatable state, it is characterized in that having:
    The 1st determination step while this step makes the change in location of above-mentioned rotor add rotor position detection voltage between the 1st phase among 3 phases of above-mentioned winding and the 2nd phase, is measured the inductance of winding;
    The 2nd determination step while this step makes the change in location of above-mentioned rotor add above-mentioned rotor position detection voltage mutually and between the 3rd phase the above-mentioned the 1st, is measured inductance;
    Magnetic reference position deciding step, this step will be decided to be the magnetic reference position in the position with respect to the above-mentioned rotor of said stator that measured value that is obtained by above-mentioned the 1st determination step and the measured value that is obtained by above-mentioned the 2nd determination step are essentially when identical; And
    The magnetic step, this step after making above-mentioned rotor comprise the predetermined angular of 0 degree from the rotation of above-mentioned magnetic reference position, thereby to the regulation of the winding of said stator switch on mutually to above-mentioned rotor above-mentioned not the magnetic part of magnetic carrying out magnetic.
  2. A permanent magnet motor magnetism method, this method be to possess stator with 3 phase windings and have not magnetic magnetic part rotor permanent magnet motor above-mentioned not the magnetic part of magnetic in said stator, under rotatable state, carrying out the method for magnetic, it is characterized in that having:
    The 1st determination step, this step is 3 alternate aforementioned winding, is made as high potential or electronegative potential mutually with the 1st, with parallel connection the 2nd mutually and the 3rd be made as electronegative potential or high potential mutually, add rotor position detection voltage while the change in location that makes above-mentioned rotor, measure the inductance of winding;
    The 2nd determination step, this step is made as high potential or electronegative potential mutually with the above-mentioned the 2nd, above-mentioned the 3rd phase and the above-mentioned the 1st that parallel connection is made as electronegative potential or high potential mutually, while make the change in location of above-mentioned rotor add above-mentioned rotor position detection voltage, measures the inductance of winding;
    Magnetic reference position deciding step, this step will be decided to be the magnetic reference position in the position with respect to the above-mentioned rotor of said stator that measured value that is obtained by above-mentioned the 1st determination step and the measured value that is obtained by above-mentioned the 2nd determination step are essentially when identical; And
    The magnetic step, this step after making above-mentioned rotor comprise the predetermined angular of 0 degree from the rotation of above-mentioned magnetic reference position, thereby to the regulation of the winding of said stator switch on mutually to above-mentioned rotor above-mentioned not the magnetic part of magnetic carrying out magnetic.
  3. Permanent magnet motor as claimed in claim 1 or 2 magnetism method, it is characterized in that: in above-mentioned the 1st determination step and above-mentioned the 2nd determination step, the scope with respect to the relative position of said stator of implementing the above-mentioned two above-mentioned rotors of measuring is identical, and the angular range of the scope of above-mentioned relative position periodic 1 periodic quantity more shown than inductance value is little.
  4. As claim 1 or 3 described permanent magnet motors magnetism method, it is characterized in that: above-mentioned magnetic step is implemented 2 times repeatedly or more than it.
  5. As any described permanent magnet motor in the claim 1 to 4 magnetism method, it is characterized in that: aforementioned any 2 alternate energisings of magnetic step among above-mentioned 3 phase windings.
  6. As any described permanent magnet motor in the claim 1 to 4 magnetism method, it is characterized in that: any 1 is made as high potential or electronegative potential mutually among above-mentioned the winding of magnetic step with above-mentioned 3 phases, 2 of the remainder of parallel connection is made as electronegative potential or high potential mutually, thereby to above-mentioned 3 alternate energisings.
  7. A permanent magnet motor not the magnetic magnetic part magnetic device, it is characterized in that having
    Drive unit is used to make the rotor rotation;
    Measurement mechanism is used to measure the rotation amount of above-mentioned rotor;
    The inductance determinator is used to measure the inductance of stator internal winding group;
    The magnetic power supply, be used for to above-mentioned rotor not the magnetic part of magnetic carrying out magnetic; And
    Control device, it controllably connects above-mentioned drive unit, above-mentioned measurement mechanism, above-mentioned inductance determinator and above-mentioned magnetic power supply, in addition, is connected to the signal that can receive from above-mentioned measurement mechanism and above-mentioned inductance determinator;
    Above-mentioned control device, in the measured value of the rotation amount of the above-mentioned rotor that obtains to obtain by above-mentioned measurement mechanism, drive the change in location that above-mentioned drive unit makes above-mentioned rotor on one side, utilize the said determination device at the inductance of measuring winding among 3 phases of above-mentioned winding between the 1st phase and the 2nd phase on one side, then in the measured value of the rotation amount of the above-mentioned rotor that obtains to obtain by above-mentioned measurement mechanism, drive the change in location that above-mentioned drive unit makes above-mentioned rotor on one side, utilize the said determination device between above-mentioned the 1st phase and above-mentioned the 3rd phase, to measure the inductance of winding on one side, ask for above-mentioned 2 inductance measured values be essentially when identical with respect to the position of the above-mentioned rotor of said stator as the magnetic reference position, make above-mentioned rotor comprise the predetermined angular of 0 degree by above-mentioned drive unit from the rotation of above-mentioned magnetic reference position, thus utilize above-mentioned magnetic upwards state with power supply stator winding regulation energising mutually to above-mentioned rotor above-mentioned not the magnetic part of magnetic carrying out magnetic.
  8. A permanent magnet motor not the magnetic magnetic part magnetic device, it is characterized in that: have
    Drive unit is used to make the rotor rotation;
    Measurement mechanism is used to measure the rotation amount of above-mentioned rotor;
    The inductance determinator is used to measure the inductance of stator internal winding group;
    The magnetic power supply, be used for to above-mentioned rotor not the magnetic part of magnetic carrying out magnetic; And
    Control device, it controllably connects above-mentioned drive unit, above-mentioned measurement mechanism, above-mentioned inductance determinator and above-mentioned magnetic power supply, in addition, is connected to the signal that can receive from above-mentioned measurement mechanism and above-mentioned inductance determinator;
    Above-mentioned control device, in the measured value of the rotation amount of the above-mentioned rotor that obtains to obtain by above-mentioned measurement mechanism, drive the change in location that above-mentioned drive unit makes above-mentioned rotor on one side, utilize on one side the said determination device alternately to be made as high potential or electronegative potential mutually with the 1st at 3 of above-mentioned winding, the 2nd of parallel connection is reached the 3rd mutually be made as the inductance that electronegative potential or high potential are measured winding mutually, then in the measured value of the rotation amount of the above-mentioned rotor that obtains to obtain by above-mentioned measurement mechanism, drive the change in location that above-mentioned drive unit makes above-mentioned rotor on one side, utilize the said determination device to be made as high potential or electronegative potential mutually on one side with the above-mentioned the 2nd, the above-mentioned the 3rd of parallel connection is reached the above-mentioned the 1st mutually be made as electronegative potential or high potential mutually, measure the inductance of winding, ask for above-mentioned 2 inductance measured values be essentially when identical with respect to the position of the above-mentioned rotor of said stator as the magnetic reference position, make above-mentioned rotor comprise the predetermined angular of 0 degree by above-mentioned drive unit from the rotation of above-mentioned magnetic reference position, thus utilize above-mentioned magnetic upwards state with power supply stator winding regulation energising mutually to above-mentioned rotor above-mentioned not the magnetic part of magnetic carrying out magnetic.
  9. As claim 7 or 8 described permanent magnet motors not the magnetic magnetic part magnetic device, it is characterized in that: the scope of carrying out the rotor-position of 2 times above-mentioned inductance mensuration comes down to identical, and the angular range of periodic 1 periodic quantity that the scope of above-mentioned rotor-position is more shown than inductance value is little.
CNB2004100575363A 2003-08-19 2004-08-17 Method and apparatus for magnetizing permanent magnetic motor Active CN100375374C (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN101212163B (en) * 2006-12-26 2010-11-10 财团法人工业技术研究院 Magnetizing and locating method and device for permanent magnet motor
CN103250343A (en) * 2010-12-06 2013-08-14 三菱电机株式会社 Inductance measurement device and measurement method for synchronous electric motor
CN113841323A (en) * 2019-05-24 2021-12-24 三菱电机株式会社 Method for manufacturing motor, compressor, and air conditioner

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CN108872886A (en) * 2018-07-05 2018-11-23 浙江博阳压缩机有限公司 A kind of simple magnetic flux detection apparatus and magnetic flux characterization processes

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0834711B2 (en) * 1990-08-18 1996-03-29 日本ビクター株式会社 Method of detecting rotor stop position in brushless DC motor without position detector
JPH09182388A (en) * 1995-12-21 1997-07-11 Daikin Ind Ltd Magnetizing method for permanent magnet type electric motor
JPH09182389A (en) * 1995-12-21 1997-07-11 Daikin Ind Ltd Magnetizing method for permanent magnet type electric motor
JPH11243671A (en) * 1998-02-23 1999-09-07 Daikin Ind Ltd Magnetization method of permanent magnet motor
JP2996226B2 (en) * 1998-03-17 1999-12-27 ダイキン工業株式会社 Magnetization method for permanent magnet type motor
CN1385941A (en) * 2001-05-16 2002-12-18 株式会社萌利克 Method and device for magnetizing and testing rotor of permanent magnetic generator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101212163B (en) * 2006-12-26 2010-11-10 财团法人工业技术研究院 Magnetizing and locating method and device for permanent magnet motor
CN103250343A (en) * 2010-12-06 2013-08-14 三菱电机株式会社 Inductance measurement device and measurement method for synchronous electric motor
CN103250343B (en) * 2010-12-06 2016-01-20 三菱电机株式会社 The inductance determinator of synchronous motor and assay method
CN113841323A (en) * 2019-05-24 2021-12-24 三菱电机株式会社 Method for manufacturing motor, compressor, and air conditioner

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