VIBRATOR DRIVING APPARATUS OF INVERTER METHOD USING THREE PHASE INDUCTION MOTOR

摘要

Disclosed is an inverter type vibrator driving apparatus using a three-phase induction motor, in which an inverter circuit is mounted in the vicinity of the three-phase induction motor, cool air discharged from a cool fan of the three-phase induction motor may be directly supplied to the inverter circuit through a side cover and an upper cover (guide) to increase cooling efficiency, a product may be miniaturized by directly mounting the inverter circuit in the vibrator driving apparatus, and disadvantages of a conventional vibrator driving apparatus using a single -phase induction motor may be obviated. A three-phase induction motor has a cooling unit formed in a rear surface of the three-phase induction motor. A frame portion fixes the three-phase induction motor, first and second side covers, and upper and lower covers. Erst and second side cover both sides of the three-phase induction motor, respectively, and guide cool air discharged from the cooling unit of the three-phase induction motor from a side part to an inverter circuit. Upper cover covers an upper portion of the three-phase induction motor, and guides the cool air discharged from the cooling unit of the three-phase induction motor from an upper part to the inverter circuit. A lower cover covers and supports a lower portion of the three-phase induction motor. An inverter circuit is fixed and attached to a lower surface of the upper cover, is spaced apart from an upper surface of the three-phase induction motor so that the cool air discharged from the cooling unit of the three-phase induction motor is readily supplied.