• Technical Parameters
     
    Description
    Specs of commutator
    Technical parameters

    Hot-state overspeed revolution test

    (220±5)℃

    Outside diameter
    Φ28mm以下
    Less than Φ28mm

    Rotate speed is 45000 RPM. Last ten minutes.
    Radial transformation is less than 0.01mm
    Outside diameter
    Φ28mm~Φ32mm
    Rotate speed is 40000 RPM. Last ten minutes.
    Outside diameter
    Φ32mm~Φ40mm
    Rotate speed is 35000 RPM. Last ten minutes.

    Outside diameter
    >Φ40mm

    Rotate speed is 30000 RPM. Last ten minutes.
    Limit deviation of the commutator internal hole
    All specs
    With bushes: H7 
    Without bushes: H8
    Deviation of the reversing piece to commutator axes
    All specs
    Nominal insulation thickness between pieces is less than 1/3
    Dielectrical strength
    All specs
    Between pieces 400V/1S 
    Piece to hole 4000V/60S
    Without breakdown and short
    Insulation resistance
    All specs
    Insulation resistance between the room temperature commutator piece and internal hole≥150MΩ
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