口腔科设备中尚有一些早期产品使用110伏电源,已不适应220伏的供电电压。通过电源变压器变压使用,既增加费用,又多耗电能。如乘检修之机,对电机进行适当改动,以直接使用电网电压,有其一定的实用价值。这种改动包括两部份。第一部份是电机绕组参数的改动,只要将原绕组的匝数增加一倍而将导线截面积减小一半即可。例如,原电机的二个定子线圈,每个线圈145匝,改动后的匝数为145×2=290匝。原每个电枢线圈为11匝,改动后则为11×2=22匝。定子线圈导线截面积应由原0.58平方毫米改为0.29平方毫 There are still some early products in stomatology that use a 110 volt supply and are no longer suitable for 220 volts supply. Transformer transformer through the use of power, both to increase costs, but also consume more energy. If by inspection machine, the appropriate changes to the motor to directly use the grid voltage, has its own practical value. This change consists of two parts. The first part is the motor winding parameter changes, as long as the original winding turns double the wire cross-sectional area can be reduced by half. For example, the original two stator coils of the stator, each coil 145 turns, change the number of turns 145 × 2 = 290 turns. The original each armature coil 11 turns, after the change is 11 × 2 = 22 turns. Stator coil wire cross-sectional area should be changed from the original 0.58 mm2 to 0.29 mm2