JP2005185057A - Electric motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an electric motor that reduces the assembling time by decreasing the number of connection points of coils. <P>SOLUTION: In the electric motor, in which the coils are wound in a concentrated manner on each tooth of a stator, a second coil adjacent in order to a first coil is made to continue without joints and wound in the reverse direction to the first coil, which are set as U phase. Similarly, a fourth coil, adjacent in the order with respect to a third coil is made to continue, without joints and is wound in the reverse direction to the third coil, which are set as W phase. In sequence, a sixth coil, adjacent in the order with respect to a fifth coil is made to continue without joints and is wound in a direction reverse to that of the fifth coil, which are set to V phase. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric motor in which a coil is concentrated and wound around each tooth of a stator, and particularly relates to the winding method.

  FIG. 4 is a winding connection diagram showing an example of a conventional stator coil and its connection. FIG. 5 is a circuit configuration diagram thereof. The figure shows a case where the number of coils of the stator is 12 with respect to the number of poles of the rotor of 8. Generally, the number of poles is P: the number of coils is Q = 2: 3. 1u to 4u are U-phase coils, 1v to 4v are V-phase coils, and 1w to 4w are W-phase coils. O indicates x and O indicates the polarity of the coil. Each coil is wound with the same polarity (wound in the same direction), one end of which is connected to a neutral point ring 5n, and the other ends are a U-phase ring 6u, a V-phase ring 6v, and a W-phase ring 6w, respectively. It is connected to the. Reference numeral 7 denotes a magnetic pole of the rotor. In this example, there are a total of 8 magnetic poles. The voltage induced in each phase coil is a balanced three-phase voltage having a phase difference of 120 ° equal to the coil interval, as shown in the voltage vector diagram of FIG.

  Since the phase difference between adjacent coils is 2 poles and a ratio of 3 coils, the electrical angle is 120 °, and the coils 1u to 4u, 1v to 4v, and 1w to 4w are balanced three-phase coils. Normally, both ends of these coils are connected to the phase rings 5n, 6u, 6v, 6w, so in this example, each phase winding is connected with four parallel circuits. In the conventional winding method, since the winding start and winding end of each coil are respectively connected to the phase ring, the connection point is twice the number of coils. In the example of FIG. 4, 12 × 2 = 24 connection work is required. The same kind and technique are disclosed in Patent Document 1.

JP 2000-60092 A

In a concentrated magnetic pole winding (P: Q = 2: 3) like a conventional electric motor, both ends of each coil must be connected to a phase ring or another coil end, resulting in a large torque specification and a large motor diameter. Then, there is a problem that the number of coils increases, the number of connection points increases, and the working time increases.
The present invention has been made to solve the above-described problems, and an object thereof is to obtain an electric motor that can reduce the number of coil connection points, reduce work time, and improve productivity. .

  The electric motor according to the present invention is a motor in which a coil is concentrated and wound around each tooth of the stator, and the second coil adjacent to the first coil is continuously connected to the first coil without a seam, and is reverse to the first coil. These are wound into a U-phase, and in turn, the next third coil is sequentially connected to the next third coil in succession without a seam, and the third coil is wound in the reverse direction. Then, these are set to the W phase, and the sixth coil adjacent to the next fifth coil in order is continuously connected without a seam, and the fifth coil is wound in the reverse direction to make them V phase. It is what.

  According to the electric motor of the present invention, it is possible to improve productivity by reducing the number of coil connection points and realizing reduction in work time.

Embodiment 1 FIG.
1 is a winding connection diagram showing a stator coil and its connection in an electric motor according to Embodiment 1 of the present invention. FIG. 2 is a circuit configuration diagram thereof. As shown in the figure, an embodiment will be described for an example of 8 poles and 12 coils. In the drawings, the same reference numerals in the past indicate the same or corresponding parts. In this embodiment, as shown in the figure, in an electric motor in which coils are concentrated and wound around each tooth of the stator 11, a coil (1v ′) adjacent to the coil (1u) in order is continuously connected without a seam. Then, the coil (1u) is wound in the reverse direction to make them U phase, and the next coil (1w) is successively connected to the next coil (1w) in succession without a joint. The coils (1w) are wound in the reverse direction to make them W-phase, and the next coil (2v) is successively connected to the next coil (2v ') in succession without a seam. These are wound in the reverse direction around the coil (2v) to form a V phase.

  In other words, in the electric motor in which the coils are concentrated and wound on each tooth of the stator 11, the U-phase coil (1u) and the V-phase coil (1v ') adjacent thereto are continuously connected without a seam. (1u) is wound in the reverse direction to make these new U-phases. Similarly, the W-phase coil (1w) and the adjacent U-phase coil (2u ′) are continuously connected. The W-phase coil (1w) is wound in the reverse direction to make these newly W-phase, and the V-phase coil (2v) and the adjacent W-phase coil (2w ') are seamless. The V-phase coil (2v) is continuously wound in the reverse direction, and these are newly made V-phase.

  Similarly, 3u and 3v ', 3w and 4u', 4v and 4w 'are continuously wound. The winding start of the first coil (each first coil) is taken as one coil terminal, and the winding end of the end coil (each second coil) is taken as the other coil terminal. By this method, it is possible to reduce the number of two terminals per one coil to two terminals per two coils. Since the end coil (each second coil) needs to have a reverse polarity with respect to the leading coil (each first coil), the winding direction of the terminal coil (each second coil) is set to the leading coil (each first coil). The winding direction is reverse to the winding direction of the second coil).

In the circuit configuration of FIG. 2, coils with dashes such as 1v ′, 2u ′, 2w ′ ----
An end coil (1v ′, 2u ′, 2w ′, etc.) wound up in the opposite direction from the first coil (1u, 1w, 2v, etc.) is shown.

FIG. 3 is a diagram of voltage vectors induced in the stator coil of the first embodiment. e1u, e1w, e2v, e3u, e3w, e4v indicate the induced voltage of the leading coil (each first coil), and e1v ′, e2u ′, e2w ′, e3v ′, e4u ′, e4w ′ represent end coils (each first coil). The induced voltage of the second coil) is shown. These voltages are added every two coils.
e1u + e1v ′ = e3u + e3v ′ = Eu
e2v + e2w ′ = e4v + e4w ′ = Ev
e1w + e2u ′ = e3w + e4u ′ = Ew
Thus, new induced voltages Eu to Ew are generated. As is clear from FIG. 3, Eu, Ev, and Ew are equal in magnitude and are balanced three-phase voltages having a phase difference of 120 ° from each other, and therefore function as windings for the motor (or generator).

  Thus, according to the present invention, the number of coil connection points can be reduced, and the connection work time can be reduced.

  The present invention is not limited to only 8 poles and 12 coils, but can be applied to general motors and generators having the number of poles: the number of coils = 2: 3.

FIG. 3 is a winding connection diagram showing stator coils and their connections in the electric motor according to Embodiment 1 of the present invention. It is a circuit block diagram of FIG. FIG. 6 is a voltage vector diagram induced in the stator coil of the first embodiment. It is the winding connection figure which shows the conventional stator coil and its connection. FIG. 5 is a circuit configuration diagram of FIG. 4. It is a voltage vector diagram induced in each conventional phase coil.

Explanation of symbols

1u-4u U-phase coil 1v-4v V-phase coil 1w-4w W-phase coil 5n Neutral point ring 6u U-phase ring 6v V-phase ring 6w W-phase ring 7 Rotor magnetic pole 11 Stator 1u 1st coil (first coil)
1v '2nd coil (terminal coil) 1w 3rd coil (leading coil)
2u '4th coil (terminal coil) 2v 5th coil (leading coil)
2w '6th coil (terminal coil).

Claims (2)

  In an electric motor in which a coil is concentrated and wound around each tooth of a stator, a U-phase coil and a V-phase coil adjacent to the U-phase coil are continuously connected and the V-phase coil is wound in a reverse direction with respect to the U-phase coil. These are used as new U-phases. Similarly, the W-phase coil and the adjacent U-phase coil are continuously connected to each other, and the U-phase coil is reversely directed to the W-phase coil. These are newly wound into a W-phase, and the V-phase coil and the adjacent W-phase coil are continuously connected without any seam, and the W-phase coil is wound in the reverse direction with respect to the V-phase coil. An electric motor characterized in that these are wound into a new V phase.   In an electric motor in which a coil is concentrated and wound around each tooth of a stator, with respect to each of a group of every six consecutive coils, a coil adjacent to the coil is successively connected without a seam and is wound in a reverse direction with respect to the coil. These are wound to make a U phase, and in turn, the next coil is successively connected to the next coil in succession without a seam, and the coil is wound in a reverse direction to make them a W phase. An electric motor characterized in that a coil adjacent to the next coil is successively connected to the next coil without a seam, and the coils are wound in a reverse direction to make them V-phase.

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