DE1638361A1 - Multi-phase synchronous electric machine - Google Patents

Description

Idcentia Patent-Verwaltunga- GmbH
Frankfurt (Main), Theodor-Stern-Kai Λ

No. 63/114 . 3.5.1967

Sr. Ko / doe

Multi-phase synchronous electric machine

The invention relates to multiphase electrical Bynchronaaachinen with high number of poles, in which either the magnetic field is generated by a permanent magnetic or energized by direct current or ·· Folrad which a Heluk dance motors or operate on the principle -generators ·

Is wound in a conventional manner, a laminated core having a multi-phase, multi-pole winding, one needs a large number of slots. A 3-phase, 16-pole winding, for example, requires at least 48 slots. Particularly in engines or generators of low power, it is difficult to distribute such a high number of grooves on Bohrungeunfang "because the slot pitch and the tooth width and groove surface are too small. For example, with a bore diameter of 60 mm with 48 grooves, a groove pitch of only 4 m would result.

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Furthermore, it was difficult to find the nested Vickel heads of the short coils of the individual phase windings to be distributed in a space-saving manner.

The object of the invention is to avoid these disadvantages

Therefore, a multiphase synchronous electrical machine with high number of poles is proposed which let characterized in that the m-phase windings of the stator, each zone W are as distributed at the hole periphery by itself, and that the slot pitch in a winding zone equal to the pole pitch, whereas the first groove a zone opposite _{to the} last groove of the adjacent zone is arranged offset by (k + a / m) times a pole pitch, where k is any positive integer including KuIl and a is also a positive integer, but smaller than m and different from zero and is the same for all zones.

A stator wound according to the invention only requires about the

1 / m-th part of the grooved steel for a conventional winding is required. The number of coils to be wound is reduced to the same extent. There are about m-four wider ones Teeth and larger hat surfaces. In this way it becomes possible Even multi-phase electrical machines with lower power can be carried out in spite of the low bore ness with high numbers of poles.

Another advantage of the invention is that it is no longer necessary to isolate the phase windings from one another.

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BATH

The invention is explained using an exemplary embodiment.

Fig. 1 shows an invention according to a pin 16 on cultivated Statorpakefc and a permanent magnet! Sehes pole wheel, three-phase synchronous machine.

The rotor 1 is shown in the example as a permanent pole wheel bit with 8 north and south poles.

The same effect could also be achieved by " soft " magnetic poles stressed by direct current. A claw pole design of the pole wheel is also possible. A magnetically soft reluctance rotor would also be conceivable, "in which" 8 distinct poles are each interrupted by a pole gap of approximately the same width.

The stator 2 designed according to the invention has 15 teeth 3, 4 and 5, which are distributed in equal zones of 5 teeth on the circumference of the stator 2. You groove pitch or the distance of | Slot opening to slot opening of two adjacent slots is within each zone equal to the pole pitch or equal to the width of a north or south pole of the rotor 1. Around the teeth 3 are '

the individual coils of the phase winding only wound the first phase , including teeth 4 and 3 corresponding to the coils of the ,]

different way two phase windings · In a known one can \ also to every other tooth of a zone logon a coil with double winding number. ^:

The 12 grooves 6, 7 and 8 are., Each of the same size. The large grooves 67, 78 and 86 located between the zones are made up of two

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Herding 7
adjacent / 6 and 7 "7 and 8 as well as 8 and 6 due to the fact that the teeth lying between them have been omitted" The omission of the intermediate teeth is then appropriate or necessary if the slot pitch between two adjacent slots has two Vicklung zones smaller than the pole pitch ^ 'is chosen «In the example, there was a need for the invention

a good model utilization select as small as possible or equal to garbage * A symmetrical distribution of three winding zones on the bore circumference results for 3-phase windings if at a »1 the number of poles is divisible by 3 with a remainder of 1 (a.fc» 2p - 16) or if a ■ 2 is divisible with a Heat 2 (eg * 2p «20). If, on the other hand, the number of poles is divisible by 3 without a remainder (eg 2p · 18), then there are different distances dec between the three adjacent slots, for example 2/3 / r * 2/3 η and 5/3 ~ · The factor k is allowed so under-

Lp L ρ ^ -P may be different, but not the phase factor a. It is also possible a phase winding in two or even more to divide more zones. This would be such a partial zone Distribute as evenly as possible around the circumference of the hole «

will

The advantages of the invention / using the example of FIG. 1 are obvious. While for a conventional 3-phase and 16-pole winding requires at least 48 slots, according to the invention, only 15 slots are sufficient. The teeth are about 5-facb wider, the groove surfaces about 3 times as large of the partial lapels to be wound is simultaneously reduced to less than 1 · a third.

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BAD ORfGiNAt

It is not necessary «to list the individual zones in the same size . If a phase winding, for example a din ·· generator, is to be subjected to a higher load, the zone provided for this winding can expediently be widened at the expense of the rest.

In the example of FIG. 1, a stator for a 3-phase winding was described. However, the invention is equally advantageously suitable for any number of phases. It does not matter whether the synchronous machine according to the invention is operated al «· generator or as a motor.

- patent claims -

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BATHROOM ORIGINAL ¹

Claims (3)

Lic ent ia Patent-Verwaltungs-GmbH ι c q ρ q e 1 Frankfurt (Main), Theodor-Stern-Kai 1 I O O O J O I Erf.-Wr. 63 / 114-3.3.1967 claims 1. Multi-phase electrical synchronous machine with high speed, characterized in that the ra Phase windings of the stator {each zone by zone on Bore circumference are distributed and that the pitch within a winding zone is equal to the pole pitch, while di first groove of a zone opposite the last groove of the adjacent zone around the (J ^ ^. Q- /) times a pole pitch offset is arranged, where k is any positive integer including zero and a is also a positive integer, but smaller than m and different from zero and is the same for all 'zones. 3. Multi-phase electrical synchronous machine according to claim 1, characterized in that the winding zones of the individual phase winding are of different sizes. 3 * multi-phase electrical synchronous machine according to claim 1 * characterized in that the per se between the adjacent grooves of two winding zones, be sensitive Tooth is omitted. 009821/1031 BATH ORIGINAL