JPS60226733A - Winding system of electric machine - Google Patents

Abstract

PURPOSE:To reduce the irregularity of the characteristic of an electric machine by balancing the positional relation of coils of respective phases. CONSTITUTION:The case of 2-phase, 6-pole 24-slot is shown. Coils of 1alpha-phase, 1beta-phase, 2alpha-phase, 2beta-phase and 3alpha-phase are sequentially filled in slots. Coils of 5alpha-phase, 5beta-phase, 6alpha-phase and 6beta-phase are further sequentially filled in slots at the 4alpha-phase as a start at the position as shown. Eventually, coils of 3beta- phase, 4alpha-phase are filled in the slots as shown to complete. In other words, two coils of 1alpha-phase and 4beta-phase are as starting windings, and two coils of 6beta- phase and 4alpha-phase are filled in the slots to complete. Thus, the positional relation of the coils of the respective phases are balanced in the winding of an electric machine to reduce the irregularity of the characteristic of the machine.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a winding system for an electric machine that is wound with a plurality of m-phase, n-pole coils.

[Background technology of the invention and its problems]

Excitation means in an electric machine is achieved by inserting a loop-wound coil into a slot of a core made of a magnetic material and energizing the coil.

Figure 1 is a side view of the coil, where current is introduced and led out from the lead wires from the lower left and right sides, forming the right piece /a and the stone piece lb.
The IC becomes the core part.

FIG. 2 shows a side sectional view of the coil wound around the core.

Insert the right piece of coil l into slot 2a of the core, put the right piece of coil l + stone piece /b into different slots, and insert the right piece of coil l into different slots.
, 2a contain two different coil pieces. Therefore, the coil in the slot is divided into two parts: upper and lower.

Generally, however, one coil is combined to form a coil group. Figure 3 shows the state of winding of the coil group around the core, ←) shows how the coil groups are combined, and 佽) shows the winding around the core.

The coil l is inserted into the upper slot of slot 2a1 r 2'2 of the core part, and the coil l' is inserted into the lower slot of slot λa3. The particularity of the winding method lies in how it is inserted.

Here, as a conventional example, a winding method for co-phase, six poles, and slots is shown in FIG.

In a rotating electric machine, the core λ has a circumferential shape, but in order to make the windings easier to see, the core λ is expanded into a straight line.

4. In Figure 7, the left piece of the seven coil groups /ail- is a coil piece moss on the upper stage of the slot, and the coil group stone piece /b is a coil piece moss on the lower stage of the slot. , according to this), and when the λ phase is the α phase and the β phase, and each coil group is shown as /αP-6α, /β~6β, looking at the position of the coil and slot (top, bottom), the coil The relationship is shown in Figure 5 for groups and Figure 6 for coils.

As described above, the positions of the α-phase and β-phase coils are not balanced.

Therefore, we will consider the effect that the unbalance of the slot arrangement of the excitation winding has on the phase error when using a rotating electric machine as a rotating transformer.

FIG. 7 shows a principle diagram of this resolver in the case of co-phase excitation and l-phase detection. j and u are excitation α-phase and /phase coils wound around the stator core λ, and 6 is a detection coil wound around the rotor j.

When the angular frequency of the excitation power source is ω and ω-2πf, f is the frequency of the excitation power source, and the time is tl and the amplitude of the excitation voltage is V, the α-phase excitation voltage va is vaIwVCO8ωt The β-phase excitation voltage Vβ is ■β″″V sin 03 t In each vector representation, ◇ Also, if θ is the rotation angle of the resolution rotor (electrical angle representation), and the detection knob θ phase voltage is θ (vector representation),
The following voltage equation holds true.

・・・・・・・・・ (1) Here, ia is α-phase current, ↑β is β-phase current, θ is θ-phase current, FLa is α-phase resistance, Rβ is β-phase resistance, Rθ is θ phase resistance, La is α phase self inductance, Lβ is β phase self inductance, La is θ phase self inductance, Maθ is α, θ phase mutual inductance, Mβθ is β,
Mutual inductance of θ phase.

To simplify the explanation, assuming that ia = O, that is, the load is open, the voltage equation is as follows.

・・・・・・・・・(e2) Here, if the arrangement of α phase and β phase is symmetrical, Rα″′Rβ″
″R Las* Lβ−L Mα0−Mβθ−M Therefore, from equation G2), the detection voltage 9θ is ÷θ−
jωMcosθ・ia+jωMθ1nθ・tβjωMv m−(.osθ−jsi, nθ,, j″Jt hill+jωL −, ejψ, .−10, ojω −Kej(Qlt−θ1ψ) ・・・・・・・・・0) Here, 1/ωL ψ=Ding−tan 7 .

According to formula 0), the detection voltage tθ is the reference voltage. On the other hand, it can be seen that the resorno is different from the ideal resorno in which the phase changes in proportion to the rotor rotation angle θ.

However, consider a case where the arrangement of the α phase and the β phase is asymmetric.

In Figure R (a), the α-phase coil J is below the slot 2a (bottom).
The magnetic flux φ1 generated by the exciting current is the effective magnetic flux φ. 1 and leakage magnetic flux φ0. The β-phase coiler shown in Fig. r is wound on the upper part of the slot) Ja,
The magnetic flux φ generated by the excitation current is the effective magnetic flux φ. 2 and leakage magnetic flux φ0. It shows that it consists of

Among the self-inductance components of the α-phase and β-phase, the main component is the effective magnetic flux φ transmitted to the rotor 5 via the gap. 1
．． φ0. , the slot leakage magnetic flux φ111φ1. This is due to

As shown in Fig. r(a), (11), the leakage magnetic flux φ01. φ0. The amount varies greatly. Therefore, each constant when the arrangement of the α phase and the β phase is asymmetric is shown as follows.

Lal1llL Lβ-L-Δ1 (here, Δ1 is 777 of La and Lβ
9271 minutes) α β αθ βθ Therefore, the detection voltage ÷ θ is “a − j” Mcos θ #I, + jωMs1nθ+
I/, j(QJt-θ+ψ)+%Msin6-↓
oj (one ω)... (41,) Here, is the difference term.

Based on the above, if the slot arrangement of α phase and β phase is asymmetric,
An imbalance occurs in the self-inductance of the α and β phases, and the currents of the α and β phases become unbalanced.
It can be seen that a phase error occurs in θ.

Here, as another conventional example, there is a three-phase, six-pole system.

The winding system for 36 slots will be explained.

Figure 2 shows the layout of the coil.

The work procedure is: lα of α phase, lβ of β phase, lγ of γ phase, λα of α phase,
...Insert the coils 6β of the β phase, 61 of the γ phase, and the coil / into the slots in sequence.

The upper and lower positions of the coil slots are shown in Figure 1O for each coil group, and in Figure 1/ for each coil.

As described above, the positions of the α-phase, β-phase, and γ-phase coils are not balanced.

[Purpose of the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the drawbacks of the prior art and to provide a winding system for an electric machine that balances the effective magnetic flux.

[Summary of the invention]

The present invention provides an excitation means composed of a plurality of coils of m-phase and n-pole, in which the coils to be inserted into the core slots (K) begin to be inserted into the slots in m pieces, one for each phase, and in the middle. This is an electric machine winding method in which each phase coil is sequentially inserted into a slot, and then m coils of 7 of each phase are further inserted into the slot.

[Embodiments of the invention]

A side cross-sectional view showing a winding method of a coil in which a core is developed linearly in an embodiment of the present invention is shown in Fig. 1.

This embodiment has a co-phase, 6 poles, and 2 double slots, and is compared to the conventional example shown in FIG. q.

The following is the procedure for inserting the coil into the slot.

In the conventional system, 12 coil groups (lα phase, lβ phase, 2α phase, ... 6α phase, 6β phase) are sequentially inserted into slots, and lα
Start winding the phase and finish by inserting the 6β phase.

Method 1 of the present invention: (1) Coils are sequentially inserted into the slots for /α phase, lβ phase, coα phase, coβ phase, and 3α phase.

■ Also, assuming the ≠β phase as the alignment start in Figure 1λ,
The coils are sequentially inserted into the slots: 5α phase, 5β phase, 6α phase, and 6β phase.

@Finally, complete the 3β phase and Vα phase by inserting the coils into the slots at the positions shown in the first figure.

Since the winding is for the laminate and λ phases, the method starts by winding λ coils of lα phase and Hiro β phase, and completes the winding by inserting λ coils of 6β phase and Hiro α phase into slots.

Although this embodiment has been described with reference to two phases, if the number of phases is m, the number of places where coils are inserted is m, and the present invention can be applied to any number of phases.

Coil and slot positions in this example (top, bottom)
Looking at the relationship shown in Figure 13 for the coil group, and Figure 1 for the coil group.

In this way, what are the α-phase and β-phase coil groups and the positions of the coils? 2 times.

FIG. 13 is a side cross-sectional view showing a coil winding method in which the core is developed linearly in another embodiment of the present invention.

This embodiment has 3 phases, 3 poles, and 36 slots, in contrast to the conventional example shown in FIG.

The placement of the coil is number one! This is shown in the figure.

The work procedure is as follows.

■ lα of α phase, lβ of β phase, /r of γ phase, λα of α phase
, put into the slot up to λβ of β phase.

(2) Next, Jβ of β phase is inserted into the slot from the position shown in FIG.

(2) Also, insert s' (of the γ phase into the slot from the position shown in Fig. 7S, and insert 6α of the α phase, 6β of the β phase, and 61 of the γ phase into the slots.

■ Finally, Jr in γ phase, 3α in α phase, jα in α phase,
Insert jβ of β phase into the slot at the position shown in Fig. 1S.

The upper and lower positions of the slots of the coils wound in this manner are shown in FIG. 16 for each coil group, and in FIG. 1'1 for each coil.

As a result of the above, the positions of the α-phase, β-phase, and γ-phase coils are balanced.

〔Effect of the invention〕

Thus, according to the present invention, it is possible to balance the positional relationship of the coils of each phase in the winding of an electric machine, and as a result, the unevenness of the characteristics of the electric machine is reduced, and the characteristics are stabilized and maintained. If it is possible to do this, it will greatly benefit this field.

[Brief explanation of the drawing]

Claims (1)

[Claims] In an excitation means for an electric machine consisting of a plurality of m-phase, n-pole coils, a coil that forms an excitation circuit, is inserted into a slot of a core made of a magnetic material, and is wound around the core. It is characterized in that the number of slots to start is m, seven for each phase, and in the middle, each phase coil is sequentially inserted into the slot, and then one coil for each phase is further inserted into the slot, completing the process. Electric machine winding system.