D88尊龙

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D88尊龙交流發電機的工作原理離不開什么?

來源:http://dgxcbw.com   發布于:2019-01-01

發電機的形式很多,但其工作原理都基于電磁感應定律和電磁力定律。因此,其構造的一般原則是:用適當的導磁和導電材料構成互相進行電磁感應的磁路和電路,以產生電磁功率,達到能量轉換的目的。

D88尊龙There are many kinds of generators, but their working principles are based on the law of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is to use appropriate magnetic conductivity and conductive materials to form mutual electromagnetic induction circuit and circuit to generate electromagnetic power and achieve the purpose of energy conversion.

一般,是三相交流發電機,就是安放相位互差120度的定子繞組。轉子的繞組的電流來自,勵磁機。勵磁機,是轉子有剩磁的單相發電機,一種是經過碳刷換向,來實現輸出直流,供給發電機的轉子。另一種是永磁機加勵磁機,永磁機的輸出,整流到勵磁機的定子,勵磁機的轉子電流就給發電機的轉子。

D88尊龙Generally, it is a three-phase alternator, that is, a stator winding with phase difference of 120 degrees. The current of the rotor winding comes from the exciter. Exciter is a single-phase generator with residual magnetism in the rotor. One is to supply the generator with DC output through carbon brush commutation. The other is the permanent magnet machine plus exciter, the output of the permanent magnet machine, rectifier to the stator of the exciter, and the rotor current of the exciter is given to the rotor of the generator.

有的發電機沒有中性點接線柱,但是也把中性點電壓充分的利用了(如夏利、桑塔納發電機),這些發電機在中性點處接上兩只整流二極管,和三相繞組的六只整流二極管一道輸出,可提高發電機功率。

TIM截圖20190101092411.png

Some generators do not have neutral point terminals, but also make full use of neutral point voltages (such as Xiali and Santana generators). These generators are connected with two rectifier diodes at the neutral point and output with six rectifier diodes of three-phase winding, which can improve the power of generators.

D88尊龙為什么定子繞組要均勻錯開120度布置?

D88尊龙Why should stator windings be evenly staggered 120 degrees?

D88尊龙(1)定子3相繞組感生電動勢的大小為:

(1) The induced electromotive force of stator 3-phase winding is as follows:

D88尊龙eu=Emsinωt=1.414Eφsinωt

EU = Emsin_t = 1.414E_sin_t

ev=Emsin(ωt-2/3π)=1.414Eφsin(ωt-2/3π)

EV = Emsin (_t-2/3pi) = 1.414E_sin (_t-2/3pi)

ew=Emsin(ωt+2/3π)=1.414Eφsin(ωt+2/3π)

EW = Emsin (_t + 2/3 pi) = 1.414 E_sin (_t + 2/3 pi)

其中:Em-每相電動勢的大值ω-電角速度f-交流電動勢的頻率(為轉速的函數)p-磁極對數n-發電機轉速(r/min)Eφ-每相電動勢的有效值

D88尊龙Among them: Em-maximum of each phase electromotive force_-angular velocity f-frequency of alternating current electromotive force (as a function of speed) P-pole logarithm N-generator speed (r/min) Ephi-effective value of each phase electromotive force

D88尊龙(2)定子每相電動勢的有效值

(2) Effective value of each phase electromotive force of stator

K-繞組系數(和發電機定子繞組的繞線方法有關)N-每項匝數(匝)φ-每極磁通(Wb)Ce-電機結構常數互動:如此每一時刻三相繞組與整流橋連接的A、B、C三點電位總有一高和低,另一個介入高低之間。

D88尊龙K-winding coefficient (related to winding method of generator stator winding) N-turn number per turn (turn) _-flux per pole (Wb) Ce-motor structure constant interaction: so at each moment three-phase winding and rectifier bridge connection A, B, C three-point potential always has the highest and lowest, another intervention between the high and low.

D88尊龙掌握發電機的檢測方法;

D88尊龙Grasp the detection method of generator;

1.整流器的檢測步驟:

1. Detection steps of rectifier:

注意:二極管只允許電流單向流動,交流發電機整流器由8個二極管(4對)組成,必須使用能檢測二極管的歐姆表測試每個二極管兩個方向的導通性,總共檢查16次。

Note: Diodes allow only one-way current flow. Alternator rectifier consists of 8 diodes (4 pairs). It is necessary to test the conductivity of each diode in two directions with an ohmmeter capable of detecting the diodes. A total of 16 checks are made.

D88尊龙(1)檢查B端子和P端子(每對二極管)之間,E端子(搭鐵)和P端子(每對二極管)之間兩個方向的導通性,所有二極管應只能單向導通。

D88尊龙(1) Check the conductivity of the two directions between the B terminal and the P terminal (each pair of diodes), the E terminal (lap iron) and the P terminal (each pair of diodes). All the diodes should be unidirectional only.

D88尊龙(2)如果有一個二極管導通狀態不符,更換整流器總成(二極管不能單獨更換)。

(2) If a diode is not in the conduction state, replace the rectifier assembly (the diode can not be replaced separately).

D88尊龙2.交流發電機電刷的檢測步驟:

2. Detection steps of alternator brush:

(1)拆下端蓋,然后擰下電刷座的2個螺釘以便取出電刷座。

D88尊龙(1) Remove the end cap, and then screw down the two screws of the brush holder to remove the brush holder.

(2)用游標卡尺測量電刷的長度。交流發電機電刷標準長度:10.5mm;修復極限:1.5mm。

(2) Measure the length of the brush with vernier caliper. Standard length of alternator brush: 10.5mm; repair limit: 1.5mm.

如果電刷長度小于小值,更換電刷總成。

If the length of the brush is less than the minimum, replace the brush assembly.

D88尊龙3.交流發電機轉子集流環的檢測步驟:

3. Detection steps of rotor collector ring of alternator:

(1)檢查集流環之間是否導通(應導通)。

(1) Check whether the collector ring is conductive (should be conductive).

D88尊龙(2)檢查集流環和轉子或集流環與轉子軸之間是否導通(不應導通)。

(2) Check whether the collector ring and the rotor or between the collector ring and the rotor shaft are conductive (should not be conductive).

(3)如果上述檢查有一項不符,則更換交流發電機。

(3) If one of the above checks is not in conformity, the alternator shall be replaced.

4.交流發電機定子的檢測步驟:

4. Detection steps of alternator stator:

(1)檢查每對引線之間是否導通(應導通)。

D88尊龙(1) Check whether each pair of leads is on (should be on).

D88尊龙(2)檢查每根引線與線圈芯子之間是否導通(不應導通)。

(2) Check whether each lead is connected to the coil core (should not).

(3)如果上述檢查有一項不符,則更換交流發電機。

D88尊龙(3) If one of the above checks is not in conformity, the alternator shall be replaced.


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