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Details
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Characteristics
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Advantages
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Ironless rotor
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Low moment of inertia
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High acceleration. Ideal for incremental motion; Linear
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No hysteresis and eddy current losses
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speed-torque function. Insensitive to shocks.
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No magnetic saturation
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High efficiency, low losses from friction only. Ideal for
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Central stator magnet
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High power per size and per weight
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battery operation.
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Small sized bearings
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Low viscous damping
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High peak torques without the risk of demagnetization
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Precious metal commutation system
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Low friction, little electrical noise
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Ideal for portable or small equipment or requiring
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Copper-graphite commutation
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High current densities may be commutated
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small dimensions
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Rated rotor temperature up to 155°C
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High peak speeds, very low speed dependent losses, low
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Very compact commutation system
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starting voltage
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High torque to inertia ratio
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Low losses and wear, low electromagnetic interference
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