JP2803254B2 - Wiring method of rotating machine winding - Google Patents

Description

The present invention relates to a method of connecting a parallel circuit of windings of a rotating machine.

In connection method of the parallel circuit of the Summary rotating machine winding of B. invention, etc. winding start of each winding composing the two series windings forming a parallel circuit together with connecting press and winding finish etc. press,
One series winding is connected in a clockwise direction and the other series winding is wound in a counterclockwise direction.Each series winding is connected between the line side connection conductor and the neutral point side connection conductor. As a result, the length of each connection conductor can be reduced to a minimum, and weight reduction can be achieved.

C. Prior Art When focusing on an AC rotating machine, when the capacity is large, the cross section of the winding of the rotating machine becomes large and thick, and the connection of the winding often uses a parallel circuit.

3 and 4 show simplified wiring diagrams of a three-phase AC rotating machine having eight poles and two parallel circuits. Paying attention to the arrangement of the U-phase 8 poles in this connection, the line-side U-phase terminal is connected to the line-side connection conductor.
AB is connected, and a neutral point side connection conductor CD is connected to the neutral point X terminal. One series winding is connected from A to C, and the other series winding is connected from B to D. And one series winding is U _{1 (+)} , U _{2 (-)} , U
_{3 (+)} , U _{4 (-)} , and the other series winding is U _{5 (+)} , U _{6 (-)} , U _{7 (+)} , U _{8 (-)} , Consists of lines.
In this case, etc. each winding composing the series winding winding start of the one side pushed, the other side of the winding end etc. windings adjacent are connected pushed example U-phase polarity (the exciting current of the motor Direction and the direction of the electromotive force of the generator) are opposite to each other, and this symbol is expressed as (+) or (−).

D. Problems to be Solved by the Invention In the connection method shown in FIGS. 3 and 4 described above, the windings U1 _{(+) to} U8 _(-) of the series windings forming a parallel circuit Since the windings are connected so as to wind in the counterclockwise direction, in other words, the first windings U ₁ and U _{5 of} one of the series windings are opposed by half a circumference, so that the line-side connection conductor AB and the neutral Each length of the point-side connection conductor CD extends for almost half a circumference.

That is, as shown in FIG. 5, in the stator provided with the stator core 1 and the stator coil 2, when the arrangement diameter of the connection conductors 3 of the parallel circuit is φM, the line-side connection conductor AB
And the length of the CD is:

This length is the same as the neutral point side length, and the other two
The same applies to the phases (V phase, W phase).

This is a problem in large-capacity machines, particularly because the conductors are thick and heavy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of connecting a winding of a rotating machine in which a connecting conductor is shortened to reduce the weight.

E. Means for Solving the Problems The present invention that achieves the above-mentioned object has a plurality of windings between a line-side connection conductor connected to a line-side terminal and a neutral point connection conductor connected to a neutral-point side terminal. of the rotating machine winding but with a parallel circuit formed by connecting a pair of serial windings and connected and winding start etc. press and winding end etc. press of the connection state windings in series in parallel to each phase In the connection method, the connection state of the series winding in the parallel circuit is such that one of the series windings is wound in a clockwise direction from the line-side connection conductor in the circumferential direction of the rotating machine, and the other is connected in series. The line is connected in series so that it winds in the counterclockwise direction from the line-side connection conductor in the circumferential direction of the rotating machine, and the end of the first winding of both series windings and the start of the winding are connected on the line side Connect to the conductor and of each last winding The winding end and the winding start are connected to the neutral point side connection conductor.

F. Embodiment An embodiment of the present invention will now be described with reference to FIG. 1 and FIG. FIGS. 1 and 2 are simplified wiring diagrams of a three-phase AC rotating machine having eight poles and two parallel circuits corresponding to FIGS. 3 and 4. FIG. In the U-phase arrangement, the line-side U-phase terminals are connected to the line-side connection conductors a and b, and the neutral-point-side X terminal is connected to the neutral-point-side connection conductor cd. Two series windings constituting a parallel circuit are connected between ac and between bd.

One series winding, in order, U1 ₍₊₎ , U2 _(-) , U3 ₍₊₎ , U4 _(-)
And the other series winding is U8 _(-) , U7 ₍₊₎ ,
U6 _(-) and U5 ₍₊₎ windings are connected in series so that they can be wound clockwise.

In this case, each winding constituting the series winding, for example, FIG.
Paying attention to U1, the winding ends on the clockwise end side (the left end in the figure) of this winding U1, and ends on the counterclockwise end side (the right end in the figure)
, All the windings U1 to U8 have a winding start and a winding end on the same side (counterclockwise end, clockwise end), so that two series of in-phase, for example, U-phase, winding mutual adjacent windings is connected winding start tempering the winding end O in our Shito, for example winding end of the winding start is connected U2 winding start sound U3 of U2 when attention is paid to the winding of the U2 And the end of winding of U1 are connected. That is, the polarity of the adjacent winding of the series winding in the same phase is connected in reverse, U _{1 (+)} , U _{2 (-)} , U _{2
3 (+)} and U _{4 (-)} .

Further, the first winding U1 of the series winding wound in the counterclockwise direction and the first winding U8 of the series winding wound in the clockwise direction have the winding start and end of the windings on the line side connection conductor. ab, and the last windings U4 and U5 are connected to the neutral side connection conductor at the beginning and end of those windings.
You will be connected to cd.

As a result, the connecting conductor can be extremely shortened as compared with the related art.

 The length of the connection conductor is as follows.

Here, 3 × the number of poles is the number of turns around the circumference, or 2 is the number of turns of 4,
2 is shown.

 This relationship is the same for the V phase and the W phase.

G. Effects of the Invention As described in the embodiments above, according to the present invention, the connection conductors on both the line side and the neutral point side can be shortened, and the connection conductor use weight can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are simplified connection diagrams for explaining the method of the present invention, FIGS. 3 and 4 are simplified connection diagrams for explaining the conventional method, and FIG. It is explanatory drawing which shows the arrangement diameter of a joining conductor. In the figure, 1 is a stator coil, 3 is a connecting conductor, U, V, W are line side terminals, and X, Y, Z are neutral point side terminals.

Claims (1)

(57) [Claims] A plurality of windings are connected in series between a line-side connecting conductor connected to a line-side terminal and a neutral-point connecting conductor connected to a neutral-point-side terminal. in connection method of starting throat press and the winding end etc. rotary windings having a parallel circuit formed by connecting a pair of the press series winding in parallel to each phase, connected in series windings in the parallel circuit The state is such that one series winding is in a series connection state in which it winds clockwise from the line-side connection conductor in the circumferential direction of the rotating machine from the line-side connection conductor. Connect the series winding in a clockwise direction, connect the end of the first winding and the start of the winding of both series windings to the line side connection conductor, and end the winding of the last winding of each. And the start of winding are connected to the neutral side connection conductor A method for connecting windings of a rotating machine.