Dc pūmana nekeneke me ahakoa, ac pūmana pūmana mo te pūmana moto, engari he rerekētanga. Ko te hanga iti o raro ki te whakauru. 1. Ko te kowhiringa o te hiko hiko, ka whiriwhirihia te kaiwhakahaere motika dc he mana hiko dc, ka whiriwhiri i te mana hiko ac ac. 2. O te hanganga rereke: dc motini kaiwhakahaere me te commutator, me te ac motika kaiwhakahaere kahore commutator. Dc nekeneke pūmana i roto i te iti ngaohiko whakaritenga o te ara iahiko, dc mana supply, watea ki te kawe. 3. Te aroaro o te commutator: i te nuinga o te korero, kei reira he kaiwhakahaere mo te taraiwa motika dc, he tohu mo te kaiwhakahaere motuka ac. Ka taea e te kaiwhakahaere motuka Dc te whakamahi i te commutator ki te huri i te ahunga o te naianei i roto i te coil, kia rite ki te whakatutuki i te ahotea pōkai i roto i te ahunga kotahi me te pānga o te hurihanga tonu. Kei runga ake ko te rereketanga i waenga i te kaiwhakahaere motuka dc me te kaiwhakahaere motuka ac, ki te hiahia koe ki te mohio ki tetahi atu, ka taea e koe te waea mai.
Ko te roopu HOPRIO he kaihanga ngaio o te kaiwhakahaere me nga motuka, i whakapumautia i te 2000. Te tari matua o te roopu i Changzhou City, Jiangsu Province.