6O伏20A五个一组的超威电瓶多少钱,以旧换新又是多少钱呢?

2025-03-16 02:03:00
推荐回答(1个)
回答1:

您好,①电机启动转矩明显降低。如果停车后再次启动时,转子左右摆动,电机不能启动运转。 ②带负载运行时,电流表指针做周期性摆动。 ③满载时转速明显降低,转子过热,机身剧烈震动,温度增高,并有较大杂音。 ④电机启动时,会从通风道内溅出火星等。 鼠笼转子发生断条故障时,通常采用以下方法进行检查。 (1)外观检查 实际检修经验表明,铸铝鼠笼转子的断裂点多发生在槽轴向长度的中心附近,而铜条转子的断裂点则多发生在笼条与端环焊接处,若系双笼转子其故障点多是出在上笼部位。此时,取出鼠笼转子,检查铁芯表面,笼条与端环交接处若有变色或过热及裂纹,即表明该处断条。 (2)更换转子检查 更换转子检查虽简单易行,但需更换上同型号良好转子进行试运转。如果更换转子后,电机运行一切恢复正常,则说明原鼠笼转子存在断条故障。 (3)通电检查 在定子绕组中通入约为额定电压10%的低压电流,在一相中串入电流表,用手慢慢地转动转子,此时电流表的读数若不稳定,而是大小循环变动,即表明转子有断条故障。 (4)铁粉检查 检查时将开关S合上,调节调压变压器,使电压从零逐渐升高,待升流器的电流逐渐增大时,转子表面即产生磁场,随后把铁粉撒在转子上。若铁粉一行行地沿着笼条方向整齐排列,表明转子完好无损。如果铁粉排列杂乱无章,或铁粉撒不上去,说明转子存在断条故障。 用铁粉检查转子时的接线图如图1-9所示。 (5)互感探测器检查 它是采用互感器原理,由大小

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