直流电机释疑

摘要

Various questions of DC machine was analyzed in detail,for instance,why does a simplex wave winding DC torque motor have uniformity of magnetic field, what is critical field resistance in self-excited DC generator, why do sparks of series wound DC motor have difference between using AC and DC power, why are commutation sparks of three slots DC motor bigger than common DC motor and why does the speed of SmCo DC motor change with the increase of temperature.%对直流电机存在的各种问题进行了详细分析,如:单波绕组的直流力矩电动机为什么可以均磁?什么是自励直流发电机的磁场临界电阻?串励直流电动机的火花为什么会变化?三槽式直流电动机的换向火花为什么大?钐钴直流电动机的转速在高低温条件下为什么有变化?有刷直流电动机和无刷直流电动机是否可逆?