JP2013027266A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce voltage unbalance between parallel circuits when the number of parallel circuits of an armature winding is other than the divisor of the number of poles.SOLUTION: In a rotary electric machine having a three-phase armature winding of lap winding configuring a parallel circuit having the number of poles larger than the product of the number of phases and the number of parallel circuit where the number of poles per parallel circuit is represented by a+b/c(b/c is an irreducible fraction), the winding of each phase is divided into (a+1) phase belts, and the coil pitch in one phase belt is changed from that in other (a) phase belts.

Description

  The present invention relates to a rotating electrical machine, and more particularly, to a rotating electrical machine suitable for one having a lap winding armature winding.

  Conventionally, for armature windings of rotating electrical machines, the number of parallel circuits has generally been selected from a common divisor of the number of poles. This is because if the number of parallel circuits other than the divisor of the number of poles is selected, the voltage between the circuits becomes unbalanced and a circulating current flows. For this reason, as a result of limiting the degree of freedom of design, a compact design may not be realized.

  According to the patent literature, the following method is disclosed as a method for obtaining a winding in which the voltage between parallel circuits is balanced.

  Patent Document 1 describes a method of performing wave winding of four parallel circuits on a 4a + 2-pole three-phase AC machine. Further, Patent Document 2 discloses that k + n / m fractional slot windings are grouped by a voltage vector and then divided by a voltage vector, and a necessary number of coils are connected from each group to obtain the number of poles / m. A method of applying a common divisor wave winding is described. Patent Document 3 describes a method of distributing conductors so that parallel circuits are balanced by setting the number of conductors in each slot to an odd number and changing the number of conductors one by one on the right side and the left side of the wire ring. Patent Document 4 describes a method of dividing a coil into two and distributing it to a parallel circuit. Further, Patent Document 5 describes a configuration in which a connection line for changing is provided to change the connection order so that a predetermined voltage vector is obtained at a connection portion of a predetermined phase in a single layer lap winding.

JP-A-48-54403 Japanese Patent Publication No. 61-27985 JP 59-213270 A JP 59-2222066 JP-A-63-131439

  However, for lap windings often used in large rotating electrical machines, a method of obtaining balanced windings for parallel circuits other than the divisor of the number of poles without special coil processing such as changing the number of slot conductors. Was not established. In addition, since large coils are mainly used for large rotating electrical machines, changing the number of conductors in a slot requires the creation of multiple types of coils, resulting in longer manufacturing periods and increased costs. There is a possibility that the maintenance will be complicated. Furthermore, in order to balance the voltages between the parallel circuits, it is necessary to configure the voltages of a plurality of circuits to be balanced, and with a simple application of the present technology, a winding method that achieves a predetermined purpose cannot be obtained. .

  The present invention has been made in view of the above points, and its object is to reduce voltage imbalance between parallel circuits when the number of parallel circuits of armature windings is selected from other than a divisor of the number of poles. And it is providing the rotary electric machine which can reduce the circulating current which flows between parallel circuits.

  Features of the rotating electrical machine of the present invention for achieving the above object will be described below.

  FIG. 12 schematically shows a cross-sectional shape of a rotating electrical machine having a general two-layer winding coil, and shows a 14-pole salient-pole synchronous machine.

  As shown in the figure, a magnetic pole 39 having a field winding 40 is attached to a rotor core 41 on a rotor of a salient pole type synchronous machine, and a stator core disposed on the outer diameter side thereof. 37 is provided with a slot 38 for receiving the lower coil 1 and the upper coil 2 constituting the armature winding. However, for convenience of illustration, the number of slots is smaller than the actual number.

  Hereinafter, means for parallel circuit configuration of the armature winding in the present invention for achieving the above object will be described.

  A parallel circuit in which the number of poles is larger than the product of the number of phases of the armature winding and the number of parallel circuits, and the number of poles per parallel circuit is represented by a + b / c (b / c is an irreducible fraction). In a rotating electrical machine having three-phase armature windings of overlapping winding, each phase winding is divided into a + 1 phase bands, and a coil pitch in one phase band is set to a coil in another a phase band. It is characterized by changing the pitch.

  Further, the phase band having a changed coil pitch includes coils of a plurality of circuits.

  Further, the rotating electric machine is configured to connect the half coil at the coil end to constitute the armature winding, the number of parallel circuits is an even number of 4 or more, and the winding of each phase is divided into a + 1 phase bands, a Each phase band has a coil pitch N, and in a phase band including coils that constitute two sets of parallel circuits, the pitch of the coils constituting one circuit is N + 1, and the pitch of the coils constituting the other circuit is N. It is characterized by -1.

  Further, the rotating electric machine is configured to connect the half coil at the coil end to constitute the armature winding, the number of parallel circuits is an even number of 4 or more, and the winding of each phase is divided into a + 1 phase bands, a When each phase band has a coil pitch N and the number of slots in each pole / phase is Nspp, in the phase band including the coils constituting two sets of parallel circuits, the pitch of the coils constituting one circuit is N + Nspp / 2. The coil pitch of another circuit is N-Nspp / 2.

  A parallel circuit in which the number of poles is larger than the product of the number of phases of the armature winding and the number of parallel circuits, and the number of poles per parallel circuit is represented by a + b / c (b / c is an irreducible fraction). In the rotating electrical machine having the three-phase armature winding of the lap winding constituting the number of stator slots, the product of the pole pitch, the number of phases, and the number of parallel circuits plus the integer multiple of the pole pitch, and in the circumferential direction It is characterized in that the coil pitch is changed with respect to the other portions of the winding of the slot of the integral multiple of the continuous pole pitch.

  In addition, the coil end connection line is provided with only a jumper line on the terminal side of the adjacent pole or separation electrode connection line on the terminal side of the system or load.

  According to the rotating electrical machine of the present invention, even when the number of parallel circuits of armature windings is other than a divisor of the number of poles, voltage imbalance between circuits can be reduced and circulating current can be reduced.

It is an expanded view which shows the armature winding of the 1 phase 2 circuit in Example 1 of the rotary electric machine of this invention. It is the enlarged view which took out the phase zone comprised by two circuits in FIG. It is an expanded view which shows the armature winding of the 1 phase 2 circuit in Example 2 of the rotary electric machine of this invention. It is the enlarged view which took out the phase zone comprised by two circuits in FIG. It is an expanded view which shows the armature winding of the 1 phase 1 circuit in the conventional rotary electric machine. It is a figure which shows the voltage vector in Example 1 of the rotary electric machine of this invention. It is a figure which shows the voltage vector of the 4th phase zone | band part of a U-phase 1st and 2nd circuit among the voltage vectors of FIG. It is a figure which shows the voltage vector in Example 2 of the rotary electric machine of this invention. It is a figure which shows the voltage vector of the 4th phase zone | band part of a U-phase 1st and 2nd circuit among the voltage vectors of FIG. It is a figure which shows the voltage vector in the conventional rotary electric machine. It is a figure which shows the voltage vector of the 4th phase zone | band part of a U-phase 1st and 2nd circuit among the voltage vectors of FIG. It is sectional drawing which shows the rotary electric machine which has a general two layer winding coil. It is an expanded view which shows the armature winding of the 1 phase 2 circuit in Example 3 of the rotary electric machine of this invention. It is an expanded view which shows the armature winding of the 1 phase 2 circuit in the modification 1 of Example 3 of the rotary electric machine of this invention. It is an expanded view which shows the armature winding of the 1 phase 2 circuit in the modification 2 of Example 3 of the rotary electric machine of this invention. It is an expanded view which shows the armature winding of the 1 phase 2 circuit in the conventional rotary electric machine. It is a figure which shows the voltage vector of the fraction pole part of U-phase 1st-3rd circuit among the voltage vectors in Example 3 of the rotary electric machine of this invention. It is a figure which shows the voltage vector of the fraction pole part of U-phase 1st-3rd circuit among the voltage vectors in the modification 1 of Example 3 of the rotary electric machine of this invention. It is a figure which shows the voltage vector of the fraction pole part of U-phase 1st-3rd circuit among the voltage vectors in the modification 2 of Example 3 of the rotary electric machine of this invention. It is a figure which shows the voltage vector of the fraction pole part of U-phase 1st-3rd circuit among the voltage vectors in the conventional rotary electric machine of FIG. It is an expanded view which shows 1-phase winding arrangement | positioning in Example 4 of the rotary electric machine of this invention. It is a figure which shows the voltage vector of the fraction pole part of U-phase 1st-5th circuit among the voltage vectors in Example 4 of the rotary electric machine of this invention. It is an expanded view which shows the one-phase winding arrangement | positioning in Example 5 of the rotary electric machine of this invention. It is an expanded view which shows the armature winding of the 1 phase 2 circuit in Example 6 of the rotary electric machine of this invention.

  Hereinafter, embodiments of the rotating electrical machine of the present invention will be described with reference to the drawings. In the following description, one half coil is assumed to be one coil. Here, since a two-layer winding mainly used for a large-sized rotating electrical machine is taken as an example, the number of coils stored in one slot is the upper and lower two.

  FIG. 1 is a diagram showing Example 1 of a rotating electrical machine of the present invention.

  The first embodiment shown in the figure is an example of a 14-pole rotating electrical machine in which armature windings composed of 4 parallel circuits with 3 phases and 2 layers are provided with 6 slots per pole per phase. The expanded view which shows the armature winding of is shown. The present embodiment shows an example in which a = 3, b = 1, and c = 2 when the number of poles per parallel circuit is expressed as a + b / c. Further, in the first embodiment shown in the figure, the solid line indicates the coil of the first circuit, and the alternate long and short dash line indicates the coil of the second circuit, and each of them is composed of four phase bands.

  Each phase band is connected by the adjacent pole connection line 5, and the winding start and winding end are connected to a terminal (not shown) as a lead wire 4. Each phase band is composed of 12 coils, while the fourth phase band 23 is composed of 6 coils of the first circuit and 6 coils of the second circuit.

  The expansion of the fourth phase zone is shown in FIG. The armature winding of Example 1 is a full-pitch winding, and the coil pitch from the first phase band to the third phase band is 18, but in the fourth phase band, the coil pitch is set to another phase by the jumper wire 15. The first circuit is 19 and the second circuit is 17. That is, the coil connection in the fourth phase band of the first circuit is as follows: lead-out line-2-jumper connection line-21-24-jumper connection line-23-6-jumper connection line-25-neighboring electrode connection line-7 (upper Coil), the coil connection in the fourth phase band of the second circuit is lead wire 24-7 (lower coil) -jumper connection wire-22-5-jumper connection wire-20 (upper coil) -3-adjacent pole connection It is the order of line-20 (lower coil).

  6 and 10 are graphs in which the electromotive force v = cos θ + jsin θ generated in the coil pieces housed in each slot is added for each circuit, and the horizontal axis is plotted as a real axis and the vertical axis is plotted as an imaginary axis.

  7 and 11 are diagrams showing voltage vectors of the fourth phase band portion of the U-phase first and second circuits among the voltage vectors of FIGS. 6 and 10, and the numbers in parentheses () are The slot number is shown. The vector display order was displayed in order from the smallest number regardless of the coil connection order.

  Compared to FIG. 11 showing the voltage vector in the conventional rotating electrical machine, the voltage vectors of the first circuit and the second circuit are matched as shown in FIG. 7 by changing the coil pitch in the fourth phase band. It is possible to provide windings in which the voltage between the circuits is balanced.

  Here, two circuits of one phase have been described. However, since the rotating electric machine of the present embodiment has four parallel circuits, the third circuit and the fourth circuit at 180 ° symmetrical positions and the other two phases also. By adopting the same configuration, the effect expected by the present invention can be obtained.

  In the first embodiment, a winding example of 14 poles and 4 parallel circuits is shown. However, it is possible to obtain balanced windings based on the same concept with respect to the number of other poles and the number of parallel circuits. Here, the circuit number and the phase band number are given for convenience of explanation, and the order is arbitrary.

  If it is difficult to provide jumper wires on the connection side for some reason, the same effect can be obtained even if some of the coils shown in the first embodiment are replaced with slots in another electrically equivalent phase band. Is possible. In this case, each coil may be connected by adding an adjacent pole or a separator connection line.

  FIG. 3 is a diagram showing Example 2 of the rotating electrical machine of the present invention.

  The second embodiment shown in the figure is an example of a 14-pole rotating electrical machine in which armature windings consisting of 4 parallel circuits with 3 phases and 2 layers are provided with 6 slots per phase per phase. The expanded view which shows the armature winding of is shown. The present embodiment shows an example in which a = 3, b = 1, and c = 2 when the number of poles per parallel circuit is expressed as a + b / c. In the second embodiment shown in the figure, the solid line indicates the coil of the first circuit and the alternate long and short dash line indicates the coil of the second circuit, respectively, and each is composed of four phase bands.

  Each phase band is connected by the adjacent pole connection line 5, and the winding start and winding end are connected to a terminal (not shown) as a lead wire 4. Each phase band is composed of 12 coils, while the fourth phase band 23 is composed of 6 coils of the first circuit and 6 coils of the second circuit.

  The expansion of the fourth phase zone is shown in FIG. The armature winding of Example 2 is a full-pitch winding, and the coil pitch from the first phase band to the third phase band is 18, but in the fourth phase band, the coil pitch is set to other phases by the jumper wire 15. The first circuit is 15 and the second circuit is 21. That is, the coil connection in the fourth phase band of the first circuit is as follows: lead-out line-5-jumper connection line-20-jumper connection line-6-jumper connection line-21-jumper connection line-6-jumper connection line-22 Neighboring pole connection line-7 (upper coil), coil connection in the 4th phase band of the second circuit is lead wire-25-jumper connection line-4-jumper connection line-24-jumper connection line-3-jumper connection line -23-jumper connection line-2-neighboring electrode connection line-20 (lower coil).

  FIG. 8 is similar to FIGS. 6 and 10, and the electromotive force v = cos θ + jsin θ generated in the coil piece housed in each slot is added for each circuit, and the horizontal axis is plotted as a real axis and the vertical axis is plotted as an imaginary axis. Is.

  Further, FIG. 9 is a diagram showing the voltage vector of the fourth phase band portion of the U-phase first and second circuits in the voltage vector of FIG. 8, and the numbers in parentheses () indicate the slot numbers. .

  Compared to FIG. 11 showing the voltage vector in the conventional rotating electrical machine, the voltage vectors of the first circuit and the second circuit are coincident with each other as shown in FIG. 9 by changing the coil pitch in the fourth phase band. It is possible to provide windings in which the voltage between the circuits is balanced.

  Here, two circuits of one phase have been described. However, in the rotating electric machine of the second embodiment, since there are four parallel circuits, the third circuit and the fourth circuit at the 180 ° symmetrical position, and the other two phases. With the same configuration, the effect expected by the present invention can be obtained.

  Moreover, although Example 2 showed the winding example of 14 poles and 4 parallel circuits, it is possible to obtain the winding balanced by the same view also about the number of other poles and the number of parallel circuits.

  The first and second circuit numbers and phase band numbers are given for convenience of explanation, and the order is arbitrary.

  FIG. 13 is a diagram showing a third embodiment of the rotating electrical machine of the present invention.

  The third embodiment shown in the figure is an example of a 14-pole rotating electrical machine in which armature windings consisting of 3 parallel circuits with 3 phases and 2 layers are provided with 6 slots per phase per pole. The expanded view which shows the armature winding of is shown. This embodiment shows an example in which a = 4, b = 2, and c = 3 when the number of poles per parallel circuit is expressed as a + b / c. In the third embodiment shown in the figure, the solid line indicates the coil of the first circuit and the alternate long and short dash line indicates the coil of the second circuit, and each of them is composed of five phase bands.

  Each phase band is connected by the adjacent pole connection line 5, and the winding start and winding end are connected to a terminal (not shown) as a lead wire 4. Each phase band is composed of 12 coils.

  In contrast to the developed view showing the one-phase two-circuit armature winding in the conventional rotating electric machine shown in FIG. 16, in the fifth phase band 24 of the first circuit and the second circuit, 2 belonging to the first circuit and the second circuit. The coils of the set are replaced using jumper wires 15.

  Thereby, as seen in FIG. 17, it is possible to reduce the voltage imbalance as compared with the voltage vector in the conventional rotating electric machine of FIG.

  FIGS. 17 and 20 show 2/3 poles of the voltage vectors of the first to third circuits of the U phase. Numbers in parentheses () indicate slot numbers.

  Further, as a modification of the present invention, FIG. 14 shows a development of the first phase in modification 1, FIG. 15 shows a development of the one-phase two circuit, and FIGS. 18 and 19 show voltage vectors.

  Table 1 summarizes the arrangement of coils corresponding to b / c poles of each circuit in the third embodiment, that is, 2/3 poles here. There are eight corresponding coils in each circuit, and the arrangement is shown. Since the number of slots per phase in the third embodiment is 6, there are six electrically equivalent slot positions, and these are A, B, C, D, E, F from the side closer to the pole center. To do.

  As can be seen from Table 1, in the first modification, the symmetrical slot positions are switched between the first circuit and the third circuit.

  Table 2 summarizes the amplitude and phase of the voltage vector when Example 3 is applied. The voltage amplitude is represented by the value obtained by setting the average value of the three circuits to 1 [p.u.], and the voltage phase angle is represented by the angle obtained by setting the average value of the three circuits to 0 [deg]. In Example 3 and its modification 1, the voltage amplitude is about 0.15 [%] and the angle is 0.0225 [deg]. In Modification 2, the difference in voltage amplitude is about 0.37 [%] and the angle is 0. By applying the present invention, it is possible to reduce unbalance between circuits even in a rotating electrical machine having three parallel circuits whose number of poles is not a multiple of three.

Although one phase has been described here, the same effect can be obtained for the other two phases by adopting the same configuration.

  FIG. 21 is a diagram showing a fourth embodiment of the rotating electrical machine of the present invention.

  The fourth embodiment shown in the figure is an example of a 14-pole rotating electrical machine in which armature windings consisting of 5 parallel circuits of 3 phases and 2 layers are provided with 5 slots per pole per phase. The expanded view which shows the armature winding of is shown. The present embodiment shows an example in which a = 2, b = 4, and c = 5 when the number of poles per parallel circuit is expressed as a + b / c. In the fourth embodiment shown in the figure, the first circuit to the fifth circuit are indicated by a solid line, an alternate long and short dash line, a dotted line (small), a dotted line (large), and a broken line, and each is composed of three phase bands.

  Each phase band is connected by the adjacent pole connection line 5, and the winding start and winding end are connected to a terminal (not shown) as a lead wire 4. Each phase band is composed of 10 coils. In order to carry out the configuration of the present invention, two first-phase band coils and two fifth-phase band coils, two second-phase band coils, and four fourth-phase band coils are connected to each other with separate electrodes. 42 is replaced.

  This makes it possible to reduce voltage imbalance as seen in FIG. FIG. 22 shows 4/5 poles of the voltage vectors of the U-phase first to fifth circuits. Numbers in parentheses () indicate slot numbers.

  Table 3 summarizes the arrangement of coils corresponding to the b / c poles of each circuit in the fourth embodiment, that is, 4/5 poles here. Since the number of slots per phase in the fourth embodiment is 5, there are five electrically equivalent slot positions, and these are designated as A, B, C, D, and E from the side closer to the pole center.

  Table 3 summarizes the amplitude and phase of the voltage vector when Example 4 is applied. The voltage amplitude is represented by a value in which the average value of 5 circuits is 1 [p.u.], and the voltage phase angle is represented by an angle in which the average value of 5 circuits is 0 [deg]. In the fourth embodiment, the voltage amplitude is about 0.9 [%] and the angle is 0 [deg]. By applying the present invention, the number of poles is not a multiple of 5, even in a rotating machine with 5 parallel circuits. Can be reduced.

  FIG. 23 is a diagram showing Example 5 of the rotating electrical machine of the present invention.

  The fifth embodiment shown in the figure is an example of a 14-pole rotating electrical machine in which armature windings consisting of 3 parallel circuits with 3 phases and 2 layers are provided with 3 slots per phase and 3 phases. The expanded view which shows the armature winding of is shown. The present embodiment shows an example in which a = 4, b = 2, and c = 3 when the number of poles per parallel circuit is expressed as a + b / c. In Example 5 shown in the figure, the solid line indicates the coil of the first circuit, the dotted line indicates the coil of the second circuit, and the alternate long and short dash line indicates the coil of the third circuit, and each is composed of five phase bands.

  Each phase band is connected by the adjacent pole connection line 5, and the winding start and winding end are connected to a terminal (not shown) as a lead wire 4. Each phase band is composed of six coils. The fifth phase band of the second circuit is composed of two lines in the fifth phase band 21-5 of the first circuit and two lines in the first phase band 23-1 of the third circuit.

  Also, two coils in the first phase band 21-1 of the first circuit and two coils in the fourth phase band 23-4 of the third circuit are exchanged.

  Table 2 summarizes the amplitude and phase of the voltage vector when Example 5 is applied. The voltage amplitude is represented by a value where the average value of the three circuits is 1 [p.u.], and the voltage phase angle is represented by an angle where the average value of the three circuits is 0 [deg]. According to the fifth embodiment, the voltage amplitude is about 0.9 [%] and the angle difference is 0. By applying the present invention, even in a rotating electric machine having three parallel circuits whose number of poles is not a multiple of 3, the circuit is unbalanced. Can be reduced.

  FIG. 24 is a diagram showing Example 6 of the rotating electrical machine of the present invention.

  The sixth embodiment shown in the figure is an example of an 18-pole rotating electrical machine in which armature windings composed of 4 parallel circuits of 3 phases and 2 layers are provided with 6 slots per pole per phase. The expanded view which shows the armature winding of is shown. This embodiment shows an example in which a = 4, b = 1, and c = 2 when the number of poles per parallel circuit is expressed as a + b / c. In Example 6 shown in the figure, the solid line indicates the coil of the first circuit, and the alternate long and short dash line indicates the coil of the second circuit, and each of the coils is composed of five phase bands.

  Each phase band is connected by the adjacent pole connection line 5, and the winding start and winding end are connected to a terminal (not shown) as a lead wire 4. Each phase band is composed of 12 coils, while the fifth phase band 24 is composed of 6 coils of the first circuit and 6 coils of the second circuit.

  Since the sixth embodiment has a configuration in which one phase band is added to the first embodiment, the slot arrangement in the fifth phase band is electrically equivalent to the fourth phase band in the first embodiment. This is the same as in the first embodiment. Further, the configuration of the fifth phase zone may be the same as that of the second embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Lower coil, 2 ... Upper coil, 3 ... Slot number, 4 ... Lead wire, 5 ... Neighboring pole connection line, 6 ... 1st phase belt, 7 ... 2nd phase belt, 8 ... 3rd phase belt, 9 ... 4th phase band, 10 ... slot part, 11 ... terminal side coil end, 12 ... anti-terminal side coil end, 13 ... circuit 1 coil, 14 ... circuit 2 coil, 15 jumper connection line, 21-1 ... first circuit 1st phase band, 21-2 ... 2nd phase band of 1st circuit, 21-3 ... 3rd phase band of 1st circuit, 21-4 ... 4th phase band of 1st circuit, 21-5 ... 1st 5th phase band of the circuit, 22-1 ... 1st phase band of the 2nd circuit, 22-2 ... 2nd phase band of the 2nd circuit, 22-3 ... 3rd phase band of the 2nd circuit, 22-4 ... Fourth phase band of second circuit, 22-5 ... Fifth phase band of second circuit, 23 ... Fourth phase band of first circuit and second circuit, 24 ... Fifth phase of first circuit and second circuit Band, 31-1, ... U-phase first circuit voltage Kuttle, 31-2 ... voltage vector of U-phase second circuit, 31-3 ... voltage vector of U-phase third circuit, 31-4 ... voltage vector of U-phase fourth circuit, 31-5 ... U-phase fifth circuit ,..., 32-1... V-phase first circuit voltage vector, 32-2... V-phase second circuit voltage vector, 32-3. 4 circuit voltage vectors, 32-5... V phase 5th circuit voltage vector, 33-1... W phase 1st circuit voltage vector, 33-2 .. W phase 2nd circuit voltage vector, 33-3. Phase third circuit voltage vector, 33-4 ... W phase fourth circuit voltage vector, 33-5 ... W phase fifth circuit voltage vector, 37 ... stator core, 38 ... slot, 39 ... magnetic pole, 40 ... Field winding, 41... Rotor core, 42... Separation line, 43-1. , 43-2 ... phase band distribution area of the first circuit, 43-3 ... phase band distribution area of the first circuit, 43-4 ... phase band distribution area of the first circuit, 43-5 ... phase of the first circuit Band distribution area.

Claims (9)

A parallel circuit in which the number of poles is larger than the product of the number of phases of the armature winding and the number of parallel circuits, and the number of poles per parallel circuit is represented by a + b / c (b / c is an irreducible fraction). In the rotating electric machine having the three-phase armature winding of the lap winding to constitute,
A rotating electrical machine characterized in that windings of each phase are divided into a + 1 phase bands, and a coil pitch in one phase band is changed to a coil pitch in another a phase bands. In the rotating electrical machine according to claim 1,
The rotating electrical machine according to claim 1, wherein the phase band with the changed coil pitch includes a plurality of circuit coils. A parallel circuit in which the number of poles is larger than the product of the number of phases of the armature winding and the number of parallel circuits, and the number of poles per parallel circuit is represented by a + b / c (b / c is an irreducible fraction). In a rotating electrical machine that has a three-phase armature winding of a lap winding to constitute, and constitutes an armature winding by connecting half coils at the coil end
The number of parallel circuits is an even number of 4 or more, the windings of each phase are divided into a + 1 phase bands, the a phase band is a coil pitch N, and the phases including two coils constituting the parallel circuit are included. A rotating electrical machine characterized in that the pitch of a coil constituting one circuit in the belt is N + 1 and the pitch of a coil constituting another circuit is N-1. A parallel circuit in which the number of poles is larger than the product of the number of phases of the armature winding and the number of parallel circuits, and the number of poles per parallel circuit is represented by a + b / c (b / c is an irreducible fraction). In a rotating electrical machine that has a three-phase armature winding of a lap winding to constitute, and constitutes an armature winding by connecting half coils at the coil end
When the number of parallel circuits is an even number of 4 or more, the windings of each phase are divided into a + 1 phase bands, the a phase band is a coil pitch N, and the number of slots per phase per pole is Nspp. The pitch of the coil constituting one circuit in the phase band including the coils constituting the parallel circuit is N + Nspp / 2, and the pitch of the coil constituting the other circuit is N−Nspp / 2. Rotating electric machine. A parallel circuit is configured in which the number of poles is larger than the product of the number of phases of the armature winding and the number of parallel circuits, and the number of poles per parallel circuit is represented by a + b / c (b / c is an irreducible fraction) In a rotating electrical machine having a three-phase armature winding of lap winding,
The number of stator slots is the product of the product of the pole pitch, the number of phases and the number of parallel circuits plus an integer multiple of the pole pitch. A rotating electrical machine characterized by changing the coil pitch. In the rotating electrical machine according to any one of claims 1 to 5,
A rotating electric machine characterized in that a coil end connection line is provided with only a jumper line on the terminal side opposite to the system or load on the side opposite to or on the other side of the connection terminal. A parallel circuit is configured in which the number of poles is larger than the product of the number of phases of the armature winding and the number of parallel circuits, and the number of poles per parallel circuit is represented by a + b / c (b / c is an irreducible fraction) In a rotating electrical machine having a two-layered three-phase armature winding that
When the number of parallel circuits of the armature winding is 3 and the number of slots of each pole and phase is 3, each parallel circuit has a + 1 phase band, and is equivalent to b / c poles of each parallel circuit. The coil arrangement corresponding to 2/3 poles is represented by A, B, C, D, E, F from the side closer to the pole center in terms of the electrically equivalent slot position. A rotating electrical machine characterized in that there are two, four for D, two for the second circuit for A, B, E, and F, two for the third circuit, two for B and F, and four for C. A parallel circuit is configured in which the number of poles is larger than the product of the number of phases of the armature winding and the number of parallel circuits, and the number of poles per parallel circuit is represented by a + b / c (b / c is an irreducible fraction) In a rotating electrical machine having a two-layered three-phase armature winding that
When the number of parallel circuits of the armature winding is 3 and the number of slots of each pole and phase is 6, each parallel circuit has a + 1 phase band, which is the b / c pole of each parallel circuit. The coil arrangement corresponding to 2/3 poles is represented by A, B, C, D, E, F from the side closer to the pole center in terms of the electrically equivalent slot position. A rotating electrical machine characterized in that there are two, four for D, two for the second circuit for A, B, E, and F, two for the third circuit, two for B and F, and four for C. A parallel circuit is configured in which the number of poles is larger than the product of the number of phases of the armature winding and the number of parallel circuits, and the number of poles per parallel circuit is represented by a + b / c (b / c is an irreducible fraction) In a rotating electrical machine having a two-layered three-phase armature winding that
When the number of parallel circuits of the armature winding is 5 and the number of slots for each pole and phase is 5, each parallel circuit has a + 1 phase band and is equivalent to b / c poles of each parallel circuit. The arrangement of coils corresponding to 4/5 poles is represented by A, B, C, D, E from the side closer to the pole center in terms of the electrically equivalent slot position. , D and E, two for the fourth circuit, two for A and E, four for C, five for the fifth circuit, two for B and D, and four for C.

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