December 29, 2014
Universal, or series wound motors, are inefficient and high maintenance because of brush replacement, high operating RPM, and poor heat dissipation. Induction, or PSC (Permanent Split Capacitor) motors have no brushes, develop consistent torque under varying loads and require lower operating current making them better suited for heavy continuous use. The higher quality induction motors usually use ball berings instead of sleeves which offers substantially longer service life.
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