c、检查剩磁电压，按外界励磁试验法步骤检查发电机和 AVR（在机静止时拆下 AVR上的 X和 XX的连线启动机组并测试 P2-P3，停机重新接上 X和 XX导线，如果测得电压大于 5V则发电机应能正常工作，低于 5V用一个直流电池负极接 XX线柱，正极通过一个二极管接 X线柱。二极管为 1A／1000V，起机 P2-P3间应有 170-250V电压，拆下电池后仍无电压查找绕组 AVR和旋转二极管。查找永磁发电机 PMGP2P3P4间电压应 170-180V／50HZ，200-216V／60HZ，若不均衡，停机从非驱动端将 PMG输出导线插件断开，检查 P2P3P4连线测定子电阻应在 2.3Ω±10％，否则定子不行，若电压均衡但电压偏低阻值正常，转子应更换）。

2、空载或负载时电压不稳

a、检查转速稳定性

b、检查稳定性设置（顺时到底逆时到开始电压波动再顺时针一

点到平稳）

3、空载或负载时电压过高

a、检查转速

b、检查发电机负载是否容性负载（功率因数超前）

4、空载时电压过低

c、检查转速

d、检查接线 1-2或外接手动微调是否连接完好

5、负载时电压过低

a、检查转速

b、检查 UFRO设置（检查发动机和 AVR）

电动机故障

1、电机不能启动： a、缺相 b、熔体烧断 c、绕组接地或相间匝间短路

2、电机外壳带电： a、绕组接地 b、绕组受潮，绝缘老化

3、电机运行时，电流表指针不稳摆动： a、转子导条开焊或断条

4、绝缘电阻低： a、绕组受潮或被水淋湿 b、绕组绝缘沾满灰尘油污 c、引出线绝缘老化破裂

d、绕组绝缘老化

5、电动机运行时有杂音、不正常： a、轴承磨损有故障 b、定转子铁芯松动 c、绕组有故障（如短路） d、轴承缺少润滑脂 e、定转子相擦或较大的砂粒进入气隙 f、系统转动惯量小

6、电机过热或冒烟： a、气隙中积满灰尘 b、电机内外积满尘土或异物影响电机散热 c、导条断裂或开焊 d、绕组匝间短路或接地 e、电机两相运转,斯坦福发电机|斯坦福发电机维修|斯坦福发电机AVR故障维修资料|斯坦福发电机AVR故障维修查找技术|斯坦福发电机AVR维修服务商

7、电动机振动： a、轴承磨损 b、导条断裂开焊 c、绕组故障（短路断路接地等） d、铁芯变形或松动 e、皮带轮安装不当 f、电机地脚螺栓松动

8、轴承发热超过规定值： a、润滑脂过多或过少 b、油质不好或含杂质 c、轴承有故障，磨损，有杂物等 d、皮带轮偏小或皮带过紧 e、轴承油隙过大或过小

㈡电路保险丝熔断：更换保险丝。

 

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.