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Fractional slot winding of brushless three-phase synchronous generator for ship

A three-phase synchronization, fractional slot technology, applied in the shape/style/structure of winding conductors, etc., can solve the problems of inability to use delta connection, large leakage reactance, long winding ends, etc., and achieve small leakage reactance and short ends. , the effect of small even harmonics

Active Publication Date: 2011-06-08
TELLHOW SCI TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] A certain type of marine brushless three-phase synchronous generator imported from abroad was originally used on a luxury tourist ship. The number of stator slots is 108, the number of poles is 8 poles, the number of phases is 3 phases, and the number of parallel branches is 4. A total of 9 coils in each branch are connected in series, the coil pitch is 11, and the turns of each coil are equal. , the leakage reactance is large; the phase voltage waveform distortion rate is greater than 5%, up to 8%, and it cannot be used in delta connection; it can only carry 25% asymmetrical load; only 30% non-linear load

Method used

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  • Fractional slot winding of brushless three-phase synchronous generator for ship
  • Fractional slot winding of brushless three-phase synchronous generator for ship
  • Fractional slot winding of brushless three-phase synchronous generator for ship

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Embodiment Construction

[0009] like figure 1 , figure 2 , image 3 As shown, the number of slots Z = 27, the number of poles 2P = 2, the number of phases m = 3, the number of parallel branches a = 1, and the pitch Y = 9 The fractional slot winding layout is as follows:

[0010]

[0011] The winding U1U1' in the U phase is arranged, the coil leads are marked as U1 and U1', the slot number occupied by the specific coil and the series sequence;

[0012] V1V1' in V phase is;

[0013] w1w1′ in phase w is;

[0014] U1U1′V1V1′W1w1′ are 120° electrical angle different from each other to form a three-phase symmetrical winding.

[0015] Wherein the turns of the two coils in U1U1′ are each 1 turn, and the turns of the remaining eight coils are each 2 turns;

[0016] Similarly in V1V1' The turns of the two coils are each 1 turn, and the turns of the remaining eight coils are each 2 turns;

[0017] in W1w1′ The turns of the two coils are each 1 turn, and the turns of the remaining eight coils ...

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Abstract

The invention relates to a fractional slot winding of a brushless three-phase synchronous generator for a ship, which is characterized by dividing the traditional fractional slot winding that has 108 rotor slots, 8 poles, 3 phases and 4 parallel branches with each branch of each phase having 9 equal-turn series-connection coils and with the coil spacing of 11 into four circulations, each circulation having 27 slots, 2 poles and 3 phases with the number of parallel branches of 1, each branch winding of each phase being formed by the series connection of 10 coils with the coil spacing of 9. Thewinding has the following technical effects of: 1. having no triple and multiples of three frequency harmonics and little content of odd harmonics of 5, 7 and the like in induced potential; 2. containing no harmonics in magnetic potential and small even harmonics; 3. having short end part of the winding and small leakage reactance; 4. having the star type connection as well as triangular connection; 5. the waveform distortion rate of phase voltage less than 5 percent; 6. permissibly carrying unsymmetrical loads of more than 25 percent; and 7. permissibly carrying nonlinear loads of 30-60 percent.

Description

technical field [0001] The invention relates to a fractional slot winding of a marine brushless three-phase synchronous generator. Background technique [0002] A certain type of marine brushless three-phase synchronous generator imported from abroad was originally used on a luxury tourist ship. The number of stator slots is 108, the number of poles is 8 poles, the number of phases is 3 phases, and the number of parallel branches is 4. A total of 9 coils in each branch are connected in series, the coil pitch is 11, and the number of turns of each coil is equal. , The leakage reactance is large; the phase voltage waveform distortion rate is greater than 5%, up to 8%, and cannot be used in delta connection; it can only carry 25% asymmetrical loads; it can only carry 30% non-linear loads. Contents of the invention [0003] The purpose of the present invention is to provide a fractional slot winding of a marine brushless three-phase synchronous generator, the above-mentioned ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K3/12
Inventor 林政安
Owner TELLHOW SCI TECH CO LTD
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