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多年来,我国在直流牵引电动机设计工作中,大多以电抗电势e_R和换向器片间电压U_K作为主要的换向性能指标。大多数资料认为:对于直流牵引电动机,要求其额定工况下的电抗电势e_(RH)≤3.5～4V;换向器平均片间电压U_(K_(ep))≤18～20V;当片间云母厚1.2mm时,最大片间电压U_(K_(max))≤40～43V,当片间云母厚1.5mm时,最大片间电压U_(K_(max))≤46～48V。用于东风_4机车的ZQDR-410牵引电动机的电抗电势e_(RH)=2.28V,最大电抗电势e_(R_(max))=
Over the years, most of the design work of DC traction motors in our country mainly uses the reactance potential e_R and the commutator voltage U_K as the main commutation performance index. Most of the information that: For DC traction motors, the required reactive power e_ (RH) ≤ 3.5 ~ 4V; commutator average inter-chip voltage U_ (K_ (ep)) ≤ 18 ~ 20V; When the mica thickness is 1.2mm, the maximum voltage between the plates U_ (K_max) ≤40 ~ 43V, the maximum voltage between the plates when the mica is 1.5mm thick U_ (K_max) ≤46 ~ 48V. The reactive potential e_ (RH) = 2.28V and the maximum reactive potential e_ (R_ (max)) of the ZQDR-410 traction motor for DF_4 locomotive are