JP4626906B2 - Reluctance motor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reluctance type electric motor that is energized with a multiphase single wave.
[0002]
[Prior art]
Reluctance motors have the advantages of large output torque and simple structure, but they have the disadvantage of generating high torque ripple, and so far have been used only in some fields.
[0003]
[Problems to be solved by the invention]
As shown in FIG. 1A, the start of energization of the coil has been set at the start of increasing the inductance value that changes when the rotor salient pole intersects with the stator salient pole. The energization stop time was set near the end of the increase in the inductance value.
With this arrangement, the rise of the torque generated at the salient pole is caused by the change in the rise current at the start of energization of the coil, and the torque generated at the salient pole rises gently, and the torque ripple of the reluctance motor is reduced. It was a factor.
[0004]
In addition, the torque generated at the salient poles falls gently because the coil was de-energized while the gradient of the rising slope of the inductance value was gradual. This also caused the torque ripple of the reluctance motor.
[0005]
OBJECT OF THE INVENTION
The present invention has been made in view of the above circumstances, and provides a reluctance motor that can generate a flat torque on a salient pole and reduce torque ripple.
[0006]
[Means for Solving the Problems]
Claim 1 ~ 4 By adopting the above method and starting the energization of the coil before the rotor salient pole and the stator salient pole start to intersect, sufficient current is supplied to the coil when the inductance value rises. The torque generated in the engine rises quickly. Thus, since the torque rises quickly, a flat torque is generated in the initial stage where the salient poles overlap. Thereby, torque ripple can be reduced as compared with the conventional case.
[0011]
Moreover, in the means of Claims 1-4, By providing a plurality of slits or grooves in the rotor salient pole or stator salient pole, the time flux is rectified in the radial direction and increases in proportion to the rotation angle, so that torque ripple can be reduced.
[0014]
Furthermore, in the means of claims 1 to 3, Restrictions on the width and number of slits that can be inserted into the salient poles are relaxed. Thereby, even in a small electric motor with a small salient pole width, torque ripple synchronized with the slit is reduced, and torque ripple can be sufficiently reduced.
In particular Claim 2 In this case, since a plurality of slits are continuous, a portion where magnetic flux generated in the overlapping portion of the slits of adjacent laminated plates easily flows is not formed, and the effect of reducing torque ripple is increased.
[0015]
Claim 4 By adopting the above means and changing and stacking the front and back of the laminate, the error of each salient pole in each laminate is absorbed, and as a result, the cross-sectional area of each salient pole in the core becomes the same.
Claim 4 By adopting the above means and shifting the positions of the salient poles of the laminated plate while shifting, the error of each salient pole in each laminated plate is absorbed, and as a result, the sectional area of each salient pole in the core becomes the same. Claim 4 By adopting the above means and changing the type of laminated plate (slit type, type of thin plate material used, etc.) and stacking, the error of each salient pole in each laminated plate is absorbed, resulting in the core Each salient pole has the same cross-sectional area.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
next, The embodiment and reference examples This will be described with reference to examples and modifications.
[ First reference example ]
1 to 4 First reference example Will be explained. First, with reference to FIG. 1, a description will be given of changes in the inductance value that occur when the rotor salient pole 1 and the stator salient pole 2 intersect, the coil energization timing and energization stop timing, and the torque generated at the salient pole. .
[0019]
The drive circuit for energizing and driving the coils of each phase of the reluctance type motor has a region where the inductance value is 0, that is, the rotor salient pole 1 and the stator salient pole 2 intersect, as shown in the upper and middle stages of FIG. It is provided so as to start energization of the coil from the front, and the advance amount from the start of energization to the rise of the inductance value is set so as to increase as the rotational speed of the reluctance motor increases.
Further, the drive circuit is provided so as to stop energization of the coil before the change point at which the rising inclination angle of the inductance value changes, that is, before the rotor salient pole 1 and the stator salient pole 2 overlap each other.
[0020]
As shown above, by starting energization of the coil before the rotor salient pole 1 and the stator salient pole 2 intersect (region where the inductance value is 0), a sufficient current is supplied to the coil at the rise of the inductance value. I is supplied. As a result, a constant current I can be supplied to the coil from the start of the salient pole crossing start (I = constant), and the rotor salient pole 1 and the stator salient pole 2 start crossing as shown in the lower part of FIG. Sometimes the torque T rises quickly on the salient pole.
Thus, since the torque T rises quickly, a flat torque T is generated from the initial stage where the salient poles overlap. Thereby, torque ripple can be reduced as compared with the conventional case.
[0021]
On the other hand, energization of the coil is stopped before the rotor salient pole 1 and the stator salient pole 2 are completely overlapped (before the rise of the inductance value). As a result, the current supply to the coil is stopped in a state where the inductance value rises constant (dL / dθ = constant). That is, since energization to the coil is stopped in a state where the rising inclination angle dL / dθ of the inductance value is constant, a flat torque T can be generated at the salient pole until just before the energization is stopped.
In this way, since the flat torque T is generated at the salient poles until just before the energization is stopped, the flat torque T is also generated at the later stage where the salient poles overlap, and the torque ripple can be reduced as compared with the conventional case.
[0022]
Torque generated at salient pole T = (1/2) I ² Although expressed by (dL / dθ), as described above, since I = constant and dL / dθ = constant, the torque T is constant. That is, the torque T generated at the salient pole is flat.
As described above, the torque T generated at the salient pole becomes flat, and as a result, the torque ripple of the reluctance motor can be reduced.
[0023]
FIG. 2 shows a rotor laminate 4 constituting the rotor 3 (corresponding to the core) and a stator laminate 6 constituting the stator 5 (corresponding to the core). this Reference example Then, as shown in FIG. 3, a plurality of slits 7 are formed in the rotor salient poles 1 of the rotor laminate 4. The plurality of slits 7 extend outward from the rotation center of the rotor 3.
Thus, since the plurality of slits 7 are provided in the rotor salient pole 1, the flow of magnetic flux in the rotor salient pole 1 becomes smooth and the torque T generated in the salient pole becomes extremely flat. The torque ripple of a reluctance motor can be greatly reduced.
[0024]
The plurality of slits 7 provided on the rotor salient poles 1 are formed by press working using a die, and are preferably formed by press working using a die, so as to be manufactured at a low cost. Is formed at the same time as press forming, and the increase in the number of processes due to the formation of the slits 7 is suppressed.
[0025]
Further, it is necessary to extend the life of the mold in order to reduce the manufacturing cost. FIG. 4 shows the relationship between the mold life and the thickness (b) of the rotor laminate 4 divided by the slit width (a). The die life is represented by the number of shots, and is determined by an increase in burrs during punching and entanglement of punched pieces. As shown in the graph of FIG. 4, in order to extend the mold life, the thickness of the rotor laminate 4 needs to be not more than 5 times the maximum slit width.
[0026]
As described above, since the thickness of the rotor laminate 4 is set to be not more than 5 times the maximum slit width, the life of the mold for forming the slit 7 in the rotor salient pole 1 of the rotor laminate 4 is lengthened. Can be stretched. Thus, since the cost required for the mold can be reduced, the manufacturing cost of the rotor laminate 4 formed with the slits 7 can be kept low. That is, an increase in cost caused by forming the slit 7 in the rotor salient pole 1 can be suppressed as much as possible.
Further, by simultaneously forming the plurality of slits 7 when the rotor laminated plate 4 of the rotor 3 is press-molded, an increase in the number of processes due to the formation of the slits 7 can be eliminated, thereby reducing the cost. Can do.
[0027]
[ Second reference example ]
Using FIGS. 5 to 14 Second reference example Will be explained. this Second reference example Indicates a more specific control example. The above First reference example With the same sign and below In description The thing with the same code | symbol shown in FIG.
The drive circuit (hereinafter, CPU 10) shown in FIG. 9 is provided so as to stop energization of the coil before the rotor salient pole 1 and the stator salient pole 2 are completely overlapped. For this reason, in order to continue the output torque of the reluctance motor 11, the salient poles of the next phase must start to overlap at the time of switching, and the inductance of the next phase must rise. That is, as shown in FIG. 5, when the energization A1 of the coil of a certain phase A is stopped, if the inductance B2 of the next phase B does not rise, a continuous torque cannot be obtained.
In addition, the inductance wrap β shown in the figure indicates an angle (wrap) from when the energization of the coil is stopped until the rotor salient pole 1 and the stator salient pole 2 overlap each other. By adjusting the inductance wrap β, A continuous torque can be obtained.
[0028]
Further, before the rotor salient pole 1 and the stator salient pole 2 are completely overlapped, control to stop energization of the coil is performed, and the arc angle X of the rotor salient pole 1 necessary for making the output torque of the reluctance motor 11 continuous. The arc angle Y of the stator salient pole 2 will be described with reference to FIGS.
The number of rotor poles A = 2n and the number of stator poles B = 2m. However, n and m are natural numbers and have a relationship of m ≠ n.
Further, the arc angle of the rotor salient pole 1 is X, the arc angle of the stator salient pole 2 is Y, and the number of phases is q.
Further, the required energization angle θ0 (mechanical angle) = electrical angle 360 ° / number of rotor poles / number of phases. That is, the required energization angle θ 0 = 360 / (A × q).
Accordingly, since the required energization angle θ0 is smaller than the overlap of the rotor salient pole 1 and the stator salient pole 2, the arc angles X and Y of the rotor salient pole 1 and the stator salient pole 2 are 360 / (A × q). It ’s bigger. That is, X, Y> 360 / (A × q) is satisfied.
[0029]
On the other hand, the CPU 10 energizes the coil before the rotor salient pole 1 and the stator salient pole 2 begin to intersect, and stops energization of the coil before the rotor salient pole 1 and the stator salient pole 2 overlap each other. This will be described with reference to FIG.
While the rotor salient pole 1 and the stator salient pole 2 start to intersect with each other until they overlap, the inductance rises as shown by the inductance change L1 in FIG. For this reason, by stopping energization of the coil before the rise in the inductance change L1 becomes gentle, a flat torque T can be generated at the salient pole until just before the energization is stopped.
[0030]
On the other hand, when the voltage V1 is applied to the coil before the rotor salient pole 1 and the stator salient pole 2 intersect (before the inductance rises), the phase current I1 rises quickly because the inductance is small. When the salient poles intersect, a sufficient phase current I1 is supplied to the coil, and a sufficient current flows through the coil at the required angle of the current. That is, an appropriate amount of current can be supplied to the coil from the start of salient pole crossing.
In other words, when a voltage is applied to the coil from the start of the salient pole crossing, the current flowing through the coil becomes the solid line I2 in FIG. 8, but by starting energization of the coil before the salient pole crosses, When the inductance rises, a sufficient phase current I1 is supplied to the coil, and a large amount of current flows through the coil only in the hatched portion in the figure. The increase in current to the coil contributes to the increase in torque. it can.
[0031]
Specific control of the reluctance motor 11 will be described with reference to FIGS. 9 to 14.
this Reference example As shown in FIG. 9, the reluctance motor 11 is a three-phase motor having U-phase, V-phase, and W-phase coils, and each phase coil is energized and controlled by the CPU 10 via the inverter circuit 12. It is what is done.
The CPU 10 is a control means equipped with the CPU 10, and controls energization of the coils of each phase based on a signal output from the encoder 13 that detects the angle of the output shaft of the reluctance motor 11.
[0032]
As shown in the upper part of FIG. 10, the encoder 13 generates a first sensor signal of several thousand pulses while the output shaft rotates 360 ° at the mechanical angle, and also while the output shaft rotates 360 ° at the mechanical angle. One pulse of the second sensor signal is generated.
As shown in the lower part of FIG. 10, the CPU 10 receives the first sensor signal and the second sensor signal and calculates a counter value serving as a reference signal for energizing the coil. The counter value is reset when the electrical angle is rotated by 360 °. When the number of rotor salient poles = Nr, the mechanical angle = electrical angle / Nr.
[0033]
The energization control of the coils of each phase by the CPU 10 will be described with reference to FIG. Here, FIG. 11 (a) shows the energization control of each phase in the prior art (applying a voltage to the coil at the start of salient pole crossing), and FIG. 11 (b) shows the present plan (before the salient pole crossing starts). The energization control of each phase in (applying a voltage to the coil) is shown.
[0034]
In the conventional control, based on the counter value calculated by the CPU 10, as shown in FIG. 11 (a), U-phase coils A0 to A0 + (1/3) B, V-phase coils A0 + (1/3) B to The energization control was performed as follows: A0 + (2/3) B, W-phase coil A0 + (2/3) B-A0. A0 is the start value of the salient pole crossing, and B is the counter value with an electrical angle of 360 °. In the figure, T0 represents the time required to rotate the electrical angle 360 °.
[0035]
The control of the present plan is based on the counter value calculated by the CPU 10, as shown in FIG. 11 (b), the U-phase coil A0 -C to A0 + (1/3) B, the V-phase coil A0 -C + (1 / 3) The energization control was performed as follows: B to A0 + (2/3) B, W phase coil A0 -C + (2/3) B to A0. That is, the energization start timing of each coil is advanced by an advance angle C value as compared with the conventional case.
This advance angle C value is set according to the rotational speed of the reluctance motor 11, and the advance angle C value is set larger as the rotational speed increases. The determination of the advance angle C value will be described later in the flowchart.
[0036]
Next, calculation of the counter value, calculation of the advance angle C value, and energization control of each coil by the CPU 10 will be described.
A flowchart for calculating the counter value will be described with reference to FIG.
First, when a pulse signal that is a first sensor signal (thousands of pulse signals at a mechanical angle of 360 °) is received from the encoder 13, a value obtained by adding 1 to the previous counter value is set as the counter value (step S1). Next, it is determined whether or not the counter value has reached B (counter value with an electrical angle of 360 °) (step S2). If the determination result is YES, the counter value is reset to 0 (step S3). If the decision result in step S2 is NO, the process returns.
The upper counter value in FIGS. 11A and 11B is calculated by this calculation flow.
[0037]
A flowchart for calculating the advance C value will be described with reference to FIGS.
First, the counter value is reset to 0 (step S11). Next, when a pulse signal which is a second sensor signal (one pulse signal at a mechanical angle of 360 °) is received from the encoder 13, the time T0 from the time when the previous pulse signal is received to the time when the current pulse is received is measured. (Step S12). Subsequently, the rotational speed 1 / T0 of the reluctance motor 11 is calculated from the measured time T0 (step S13). Next, based on the map shown in FIG. 13B, the advance angle C value is calculated from the rotational speed 1 / T0 calculated in step S13 (step S14), and then the process returns.
With the above calculation flow, the advance angle C value (corresponding to the energization start time of the coil before the salient poles intersect) is calculated.
[0038]
A flow chart of energization control of each coil will be described with reference to FIG.
First, it is determined whether or not the value obtained by subtracting the advance angle C from time A0 when the salient poles intersect is 0 or more (A0−C ≧ 0) (step S21).
If the decision result in the step S21 is YES, it is judged whether or not the counter value is larger than A0−C and not more than A0 + (1/3) B (step S22). If the determination result in step S22 is YES, the U-phase coil is turned on (step S23), and if the determination result is NO, the U-phase coil is turned off (step S24).
[0039]
Next, it is determined whether or not the counter value is greater than A0-C + (1/3) B and less than or equal to A0 + (2/3) B (step S25). If the determination result in step S25 is YES, the V-phase coil is turned on (step S26), and if the determination result is NO, the V-phase coil is turned off (step S27).
Next, it is determined whether or not the counter value is greater than A0-C + (2/3) B and less than or equal to A0 (step S28). If the determination result in step S28 is YES, the W-phase coil is turned on (step S29). If the determination result is NO, the W-phase coil is turned off (step S30), and then the process returns.
[0040]
If the determination result in step S21 is NO, it is determined whether or not the counter value is greater than A0-C + B and less than or equal to A0 + (1/3) B (step S31). If the determination result in step S31 is YES, the U-phase coil is turned on (step S32). If the determination result is NO, the U-phase coil is turned off (step S33), and then the process proceeds to step S25.
With the above control flow, energization of the coils of each phase can be started before the salient poles intersect (for the advance angle C value).
[0041]
[ Third reference example ]
this Third reference example As shown in FIG. 15, a plurality of slits 7 are formed only on the salient poles 2 of the stator 5.
[0042]
[ Fourth reference example ]
this Fourth reference example As shown in FIG. 16, a plurality of slits 7 are formed on the salient poles 1 of the rotor 3, and a plurality of slits 7 are also formed on the salient poles 2 of the stator 5.
[0043]
[ 5th reference example ]
this 5th reference example Indicates a change in torque ripple due to the number of slits 7, First reference example The description will be made using a reluctance motor (see FIG. 2) in which the stator 5 has 12 slots and the rotor 3 has 8 poles (the slit 7 is only on the rotor 3 side).
FIG. 17 shows a torque waveform when the position, number, and width of the slits 7 in the salient poles 1 of the rotor 3 are the same. A solid line A is a case of 14 slits 7 and a solid line B is a slit 7. Is the case of seven.
As shown in FIG. 17, when the number of the slits 7 is 7, the torque ripple is increased as compared with the case of 14 slits. This is intended to rectify the magnetic flux flow in the radial direction by inserting slits 7 and increase the number of magnetic fluxes in proportion to the rotation angle. However, the rectifying effect is reduced by reducing the number of slits 7. This is because the torque ripple increases due to thinning.
[0044]
[ First embodiment ]
First embodiment Is suitable for use in a small electric motor having a small salient pole width. The rotor 3 is obtained by alternately laminating two types of laminated plates (slit specification A and slit specification B) with different specifications of the slit 7, and the specifications of the two types of slits 7 are as shown in FIG. The number and width of the slits 7 of the pole 1 are the same, and the positions of the slits 7 are different.
FIG. 19 shows a torque waveform of the reluctance motor using the rotor 3 provided as described above. In the figure, a solid line A is a torque waveform based on the slit specification A, a solid line B is a torque waveform based on the slit specification B, and a solid line C is a combined waveform.
In this embodiment, the slit specifications A and the slit specifications B of the slit specification B are alternately stacked, so that a large number of slits 7 are formed in the core salient pole even in a small motor having a small salient pole width. An equivalent torque ripple reduction effect can be obtained.
[0045]
[ Second embodiment ]
this Second embodiment As shown in FIG. 20, the laminated plate 4 in which the salient poles 1 of the slit specification A and the slit specification B are alternately arranged is laminated alternately by shifting one pole as shown in FIG. of First embodiment The same effect can be obtained.
[0046]
[ Sixth reference example ]
this Sixth reference example As shown in FIG. 22, the slit 7 is provided in an open slit extending to the outer end of the salient pole 1.
Shown above Tas Since the lit 7 is a closed slit that extends only to the vicinity of the outer end of the salient pole 1, a magnetic path is formed at the tip of the salient pole 1, magnetic flux flows into the magnetic path, and the flux barrier effect by the slit 7 is reduced. The tendency to do is seen.
However, by making the slit 7 an open slit, a magnetic path at the tip of the salient pole 1 is not formed, and the flux barrier effect by the slit 7 is increased. Thereby, since the magnetic path between the salient poles 1 and the salient poles 2 facing each other is formed smoothly, the effect of reducing torque ripple is increased.
[0047]
[ Third embodiment ]
(A), (b) of FIG. 23 is the figure which looked at the salient pole 1 which laminated | stacked the laminated board 4 in which the slit 7 was provided in the open slit from the side surface. In the drawing, a black portion indicates an air portion formed by the slit 7, and a white portion indicates an iron portion constituting the salient pole 1.
In FIG. 23A, two types of laminated plates 4 are alternately stacked, and the position of the slit 7 is shifted for each laminated plate 4, and the magnetic flux easily flows at the overlapping portion of the slits 7 of the adjacent laminated plates 4. A part is made. Therefore, the magnetic flux flows to the adjacent laminated plate 4 and the effect of reducing the torque ripple by the slit 7 is reduced.
Therefore, as shown in FIG. 23 (b), a plurality of two types of laminated plates 4 are stacked one by one, and the positions of the slits 7 are arranged so as to be different for each of the adjacent laminated plates 4, so that the slits 7 of the same specification are provided. Arrange them so that they overlap. Then, the magnetic flux flowing between the adjacent laminated plates 4 can be greatly reduced, and the effect of reducing the torque ripple by the slit 7 can be increased.
[0048]
[ Seventh reference example ]
24A and 24B are drawings showing the salient pole 1.
FIG. 24A shows an arrangement in which the slits 7 are equally spaced with the same width. The salient pole 1 provided with such a slit 7 has a reduced torque ripple, and a torque waveform shown by a broken line in FIG. 25 is obtained.
However, an abrupt increase in the amount of magnetism occurs at the beginning of facing the opposing salient pole 2 that is opposed to the rotating shaft during rotation, and the amount of magnetic flux suddenly increases and torque increases at the beginning of facing.
Further, in the latter half of the start of facing the opposing salient pole 2 that faces the other during rotation, the amount of magnetism suddenly decreases, magnetic saturation occurs in the latter half of the facing start, and the torque decreases.
[0049]
Therefore, as shown in FIG. 24B, the width of the slit 7 at the front end in the rotational direction opposite to the counter salient pole 2 is increased, and the gap density by the slit 7 at the front end in the rotational direction is increased. Then, a sudden increase in the amount of magnetism at the beginning of the opposing start is suppressed, the amount of magnetic flux at the beginning of the opposing start is reduced, and the torque is reduced.
Further, as shown in FIG. 24B, the width of the slit 7 at the rear end facing the counter salient pole 2 in the rotational direction is made small, and the gap density by the slit 7 at the rear end facing the rotational direction is made small. Then, in the late stage of the opposing start, magnetic saturation is suppressed and the torque increases.
[0050]
That is, as shown in FIG. 24B, the torque shown by the solid line in FIG. 25 is obtained by providing a large gap density by the slit 7 at the front end opposite to the rotation direction and providing a small gap density by the slit 7 at the rear end opposite the rotation direction. A waveform is obtained.
In addition , Su Although the example which changes the space | gap density by the slit 7 in the rotation direction opposing front end and rear end by changing the width | variety of the lit 7 was shown, the rotation direction is changed by changing the position of the slit 7 or changing the number of the slits 7. Varying the gap density by the slits 7 at the front and rear ends Same Various effects can be obtained.
[0051]
[ Eighth reference example ]
FIG. 26 shows the salient pole 1. this Reference example Is used for a reluctance type motor that rotates both forward and reverse, with the width of the slits 7 at both ends of the salient pole 1 being increased and the gap density due to the slits 7 at both ends of the salient pole 1 being increased. is there. Thus, the torque ripple in forward / reverse rotation can be reduced by providing the difference of the slit 7 width symmetrically.
In addition , Su Although the example in which the gap density by the slit 7 is changed by changing the width of the lit 7 is shown, the gap density by the slit 7 may be changed by changing the position of the slit 7 or changing the number of the slits 7. .
[0052]
[ Fourth embodiment ]
FIG. 27 is a view of the salient pole 1 obtained by laminating the laminated plate 4 in which the slit 7 is provided in the open slit, as viewed from the side. In the drawing, a black portion indicates an air portion formed by the slit 7, and a white portion indicates an iron portion constituting the salient pole 1.
this Fourth embodiment Is a method in which the gap density by the slits 7 is changed by overlapping a plurality of two types of laminated plates 4 and changing the ratio of the two types of laminated plates 4. Even in this way, Seventh reference example The same effect can be obtained.
[0053]
[ Example 5 ]
this Example 5 FIG. 28 shows the arrangement of two types of laminated plates 4 in which the positions of the slits 7 are different in the same salient pole 1. The distance between the slit 7 of one laminated plate 4 and the other slit 7 is shown in FIG. As shown, they are arranged at equal intervals (a = b).
When the gap between the slit 7 of one laminated plate 4 and the other slit 7 is provided at unequal intervals (a> b, a <b), the torque waveform with respect to the rotation angle is as shown in FIG. A small amount of torque ripple is generated.
However, when the gap between the slit 7 of one laminated board 4 and the other slit 7 is provided at equal intervals (a = b), the torque ripple peaks are canceled out and the torque ripple generated by the slit 7 is further reduced. As much as possible, the peaks and valleys of the torque ripple are canceled as shown in FIG.
[Brief description of the drawings]
FIG. 1 is a graph showing changes in inductance value, energization timing and energization stop timing of a coil, and torque waveforms (conventional example and First reference example ).
FIG. 2 is a view showing a laminated plate of a rotor and a stator ( First reference example ).
3 is a partially enlarged view of FIG. 2 ( First reference example ).
FIG. 4 is a graph showing the relationship between the life of a mold and the plate thickness (b) / slit width (a) ( First reference example ).
FIG. 5 is a graph showing an energization pattern to each coil phase ( Second reference example ).
FIG. 6 is a diagram showing a rotor and a stator for explaining the arc angle of salient poles ( Second reference example ).
FIG. 7 is a graph showing the relationship between the required energization angle and the salient pole arc angle ( Second reference example ).
FIG. 8 is a graph showing changes in phase current ( Second reference example ).
FIG. 9 is a schematic configuration diagram of a control circuit ( Second reference example ).
FIG. 10 is an explanatory diagram showing an encoder signal and a counter value ( Second reference example ).
FIG. 11 is an explanatory diagram showing energization states of coils of each phase ( Second reference example ).
FIG. 12 is a flowchart for calculating a counter value ( Second reference example ).
FIG. 13 is a flowchart for calculating an advance C value ( Second reference example ).
FIG. 14 is a flowchart showing energization control of coils of each phase ( Second reference example ).
FIG. 15 is a view showing a laminated plate of a rotor and a stator ( Third reference example ).
FIG. 16 is a view showing a laminated plate of a rotor and a stator ( Fourth reference example ).
FIG. 17 is a graph showing a torque waveform ( 5th reference example ).
FIG. 18 is a diagram showing salient poles with different slit specifications ( First embodiment ).
FIG. 19 is a graph showing a torque waveform ( First embodiment ).
FIG. 20 is a view showing a laminated plate of a rotor and a stator ( Second embodiment ).
FIG. 21 is a diagram showing a stacked state of salient poles having different slit specifications ( Second embodiment ).
FIG. 22 is a diagram of salient poles with open slits ( Sixth reference example ).
FIG. 23 is a view of salient poles as viewed from the side ( Third embodiment ).
FIG. 24 is a diagram showing a salient pole slit ( Seventh reference example ).
FIG. 25 is a graph showing a torque waveform ( Seventh reference example ).
FIG. 26 is a diagram showing a salient pole slit ( Eighth reference example ).
FIG. 27 is a view of salient poles as viewed from the side ( Fourth embodiment ).
FIG. 28 is a diagram showing a salient pole slit ( Example 5 ).
FIG. 29 is a graph showing a torque waveform ( Example 5 ).
[Explanation of symbols]
1 Rotor salient pole
2 Stator salient poles
3 Rotor (core)
4 Rotor laminate
5 Stator (core)
6 Stator laminate
7 Slit
10 CPU (drive circuit)
11 Reluctance motor

Claims (6)

It is a reluctance type electric motor with multi-phase single-wave energization,
The drive circuit for energizing and driving the coils of each phase starts energization of the coils before the rotor salient poles and the stator salient poles start to intersect ,
The core constituting the rotor salient pole or the stator salient pole is constituted by laminating a plurality of laminated plates made of magnetic thin plates,
The laminates have a plurality of slits or grooves in the stator teeth in,
In the same salient pole of the core, the position or number of slits, or the slit width is different for each adjacent laminated plate. It is a reluctance type electric motor with multi-phase single-wave energization,
The drive circuit for energizing and driving the coils of each phase starts energization of the coils before the rotor salient poles and the stator salient poles start to intersect ,
The core constituting the rotor salient pole or the stator salient pole is constituted by laminating a plurality of laminated plates made of magnetic thin plates,
The laminates have a plurality of slits or grooves in the stator teeth in,
In the same salient pole of the core, the position or number of slits, or the slit width is different for each of a plurality of adjacent laminated plates. It is a reluctance type electric motor with multi-phase single-wave energization,
The drive circuit for energizing and driving the coils of each phase starts energization of the coils before the rotor salient poles and the stator salient poles start to intersect ,
The core constituting the rotor salient pole or the stator salient pole is constituted by laminating a plurality of laminated plates made of magnetic thin plates,
The laminates have a plurality of slits or grooves in the stator teeth in,
In one laminated plate, the position or number of slits or the slit width differs for each adjacent salient pole,
A reluctance type electric motor characterized in that salient poles having different positions or numbers of slits or slit widths are provided to overlap each other. It is a reluctance type electric motor with multi-phase single-wave energization,
The drive circuit for energizing and driving the coils of each phase starts energization of the coils before the rotor salient poles and the stator salient poles start to intersect ,
The core constituting the rotor salient pole or the stator salient pole is constituted by laminating a plurality of laminated plates made of magnetic thin plates,
The laminates have a plurality of slits or grooves in the stator teeth in,
A reluctance type electric motor wherein the front and back surfaces of the laminated plate are changed and overlapped, or the salient poles of the laminated plate are shifted and overlapped, or the type of the laminated plate is changed and overlapped. The reluctance motor according to claim 1 or 2 ,
In one laminated plate, the position or number of slits or the slit width differs for each adjacent salient pole,
A reluctance type electric motor characterized in that salient poles having different positions or numbers of slits or slit widths are provided to overlap each other. In the reluctance motor according to any one of claims 1 to 3 and claim 5 ,
A reluctance type electric motor wherein the front and back surfaces of the laminated plate are changed and overlapped, or the salient poles of the laminated plate are shifted and overlapped, or the type of the laminated plate is changed and overlapped .

Images