307—6型电动台式牙钻电机转速变慢检修一例

• 作 者: 马仁斌 梁江霞
• 机 构: 山东省东营市胜利医院!东营市257055,山东省东营市胜利医院!东营市257055
• 出 处: 医疗卫生装备
• 发表日期: 2000年01期
• 关键词: 牙钻 电机绕组 万能转换开关 继电器触点 脚踏开关 供电回路 电阻档 变质现象 电路原理 励磁绕组

1　故障现象通电后踩动脚踏开关,转换调速开关各档位,电机转速均比正常值慢很多。2　分析与检修为方便检修,笔者根据实物绘制的该机电路原理如图1所示。电机转速变慢但能够转动,说明脚踏开关Ｓ2、万能转换开关(调速开关)Ｓ3及继电器Ｋ线圈工作基本正常。应重点检查电机绕组及电

1 Fault phenomenon After the power is turned on, the foot switch is stepped on, and each gear of the speed control switch is changed. The motor speed is much slower than the normal value. 2 Analysis and Maintenance In order to facilitate maintenance, the principle of the aircraft drawn by the author based on the physical diagram shown in Figure 1. The motor rotates slowly but can rotate, indicating that the foot switch S2, the universal switch (speed switch) S3, and the relay K coil are working normally. Should focus on checking motor windings and electricity