| 摘要 |
A wound rotor 10 for an electric motor has a shaft 12, an insulating spacer 28 fitted to the shaft, a rotor core 18 and commutator 20 fitted to the spacer and windings 24 wound around poles of the rotor core and terminated on the commutator. A first end of the spacer 28 remote from the commutator 20 has an axially extending recess forming an annular space 30 with the shaft 12. A winding shield 32 having a tubular portion 34 and a radially extending portion 36 is fitted to the shaft 12 such that the tubular portion 34 is located within the annular space 30. The winding shield increases the electrical clearance distance and creepage distance between the windings and the shaft and/or bearing located on the shaft adjacent the shield.
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