c、檢查剩磁電壓，按外界勵(lì)磁試驗(yàn)法步驟檢查發(fā)電機(jī)和 AVR（在機(jī)靜止時(shí)拆下 AVR上的 X和 XX的連線(xiàn)啟動(dòng)機(jī)組并測(cè)試 P2-P3，停機(jī)重新接上 X和 XX導(dǎo)線(xiàn)，如果測(cè)得電壓大于 5V則發(fā)電機(jī)應(yīng)能正常工作，低于 5V用一個(gè)直流電池負(fù)極接 XX線(xiàn)柱，正極通過(guò)一個(gè)二極管接 X線(xiàn)柱。二極管為 1A／1000V，起機(jī) P2-P3間應(yīng)有 170-250V電壓，拆下電池后仍無(wú)電壓查找繞組 AVR和旋轉(zhuǎn)二極管。查找永磁發(fā)電機(jī) PMGP2P3P4間電壓應(yīng) 170-180V／50HZ，200-216V／60HZ，若不均衡，停機(jī)從非驅(qū)動(dòng)端將 PMG輸出導(dǎo)線(xiàn)插件斷開(kāi)，檢查 P2P3P4連線(xiàn)測(cè)定子電阻應(yīng)在 2.3Ω±10％，否則定子不行，若電壓均衡但電壓偏低阻值正常，轉(zhuǎn)子應(yīng)更換）。
2、空載或負(fù)載時(shí)電壓不穩(wěn)
a、檢查轉(zhuǎn)速穩(wěn)定性
b、檢查穩(wěn)定性設(shè)置（順時(shí)到底逆時(shí)到開(kāi)始電壓波動(dòng)再順時(shí)針一
點(diǎn)到平穩(wěn)）
3、空載或負(fù)載時(shí)電壓過(guò)高
a、檢查轉(zhuǎn)速
b、檢查發(fā)電機(jī)負(fù)載是否容性負(fù)載（功率因數(shù)超前）
4、空載時(shí)電壓過(guò)低
c、檢查轉(zhuǎn)速
d、檢查接線(xiàn) 1-2或外接手動(dòng)微調(diào)是否連接完好
5、負(fù)載時(shí)電壓過(guò)低
a、檢查轉(zhuǎn)速
b、檢查 UFRO設(shè)置（檢查發(fā)動(dòng)機(jī)和 AVR）
電動(dòng)機(jī)故障
1、電機(jī)不能啟動(dòng)： a、缺相 b、熔體燒斷 c、繞組接地或相間匝間短路
2、電機(jī)外殼帶電： a、繞組接地 b、繞組受潮，絕緣老化
3、電機(jī)運(yùn)行時(shí)，電流表指針不穩(wěn)擺動(dòng)： a、轉(zhuǎn)子導(dǎo)條開(kāi)焊或斷條
4、絕緣電阻低： a、繞組受潮或被水淋濕 b、繞組絕緣沾滿(mǎn)灰塵油污 c、引出線(xiàn)絕緣老化破裂
d、繞組絕緣老化
5、電動(dòng)機(jī)運(yùn)行時(shí)有雜音、不正常： a、軸承磨損有故障 b、定轉(zhuǎn)子鐵芯松動(dòng) c、繞組有故障（如短路） d、軸承缺少潤(rùn)滑脂 e、定轉(zhuǎn)子相擦或較大的砂粒進(jìn)入氣隙 f、系統(tǒng)轉(zhuǎn)動(dòng)慣量小
6、電機(jī)過(guò)熱或冒煙： a、氣隙中積滿(mǎn)灰塵 b、電機(jī)內(nèi)外積滿(mǎn)塵土或異物影響電機(jī)散熱 c、導(dǎo)條斷裂或開(kāi)焊 d、繞組匝間短路或接地 e、電機(jī)兩相運(yùn)轉(zhuǎn),斯坦福發(fā)電機(jī)|斯坦福發(fā)電機(jī)維修|斯坦福發(fā)電機(jī)AVR故障維修資料|斯坦福發(fā)電機(jī)AVR故障維修查找技術(shù)|斯坦福發(fā)電機(jī)AVR維修服務(wù)商
7、電動(dòng)機(jī)振動(dòng)： a、軸承磨損 b、導(dǎo)條斷裂開(kāi)焊 c、繞組故障（短路斷路接地等） d、鐵芯變形或松動(dòng) e、皮帶輪安裝不當(dāng) f、電機(jī)地腳螺栓松動(dòng)
8、軸承發(fā)熱超過(guò)規(guī)定值： a、潤(rùn)滑脂過(guò)多或過(guò)少 b、油質(zhì)不好或含雜質(zhì) c、軸承有故障，磨損，有雜物等 d、皮帶輪偏小或皮帶過(guò)緊 e、軸承油隙過(guò)大或過(guò)小
㈡電路保險(xiǎn)絲熔斷：更換保險(xiǎn)絲。
Stanford Generator (SX440 460 321 341 AVR) Troubleshooting to find
1, the unit start voltage:
a, check the line K1 - K2
b check the speed
c, check the remanence voltage, external excitation test method steps to check generator and AVR (unit and test the P2-P3, the machine stationary remove AVR X and XX of the connection start and stop re-connected to the X and XX wire If the measured voltage is greater than 5V the generator should be able to work properly, less than 5V with a DC battery negative pole XX Line column, what is the cathode connected through a diode X-ray column. diode for 1A/1000V, from the native P2-P3 between should be 170-250V voltage, remove the battery still no voltage to find the winding AVR and the rotating diodes. Find the voltage between the permanent magnet generator PMGP2P3P4 to should 170-180V/50HZ, 200-216V / 60HZ, if not balanced, downtime from non-drive side will disconnect the PMG output wire plug the check P2P3P4 connection determination of child resistance in 2.3Ω ± 10%, otherwise the stator can not, if the voltage is balanced but voltage is low resistance to normal, the rotor should be replaced).
2, no-load or load voltage instability
a, check the speed stability
b check the stability of the set (clockwise in the end reverse to the beginning of voltage fluctuation and then clockwise
Point to the stable)
3, no-load or load voltage is too high
a check speed
b, check the generator load is capacitive load (power factor ahead)
4, no-load voltage is too low
c check the speed
d, check the wiring 1-2 or external to manually fine-tune the connection intact
5, the load voltage is too low
a check speed
b check UFRO the settings (check the engine and the AVR)
Motor fault
1, the motor can not start: a, phase b, melt blown c winding ground or white interturn short circuit
2, the motor housing live: a winding grounded b, winding dampness, insulation aging
3, when the motor is running, the ammeter pointer unstable swing: a rotor bar open solder or broken bars
4, low insulation resistance: a, winding dampness or water wet b, winding insulation covered with dust, greasy dirt c Lead insulation aging rupture
d, winding insulation aging
5, when the motor is running noise is not normal: a bearing wear fault b, fixed rotor core loose c, winding faults (eg short circuit) d, bearing to the lack of grease e stator and rotor rub or larger sand enter the air gap f, the system moment of inertia
Motor overheating or smoke: a, air-gap in the dusty b motor inside and outside the dusty or foreign body affecting the motor cooling c conductivity fracture or open solder d, winding interturn short circuit or ground e, motor two-phase operation
7, motor vibration: a, bearing wear b, BAR breaking open welding c winding fault (short circuit grounding, etc.) d core deformation or loosening of e pulley improper installation, f, motor anchor bolts loose
8, bearing fever more than require values: a, grease too much or too little b oil is not good or impurities c, bearing failure, wear, and other debris d pulley is too small or belt pull e bearings oil clearance is too large or too small
(Ii) circuit blown fuse: Replace the fuse.
