the armature core comprises the following components: a back yoke which has a main surface approximately vertical to the shaft and has an approximate disc shape;
该电枢铁芯包括:具有与轴大致垂直的主面的大致圆盘形状的背轭;
straight back yoke with box pleat.
直背盒褶的枷锁。
also, the flux density at the back yoke can be found from this flux, and the back yoke cross-section area.