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公开(公告)号：US20210285140A1
公开(公告)日：2021-09-16
申请号：US17258107
申请日：2019-07-05
Applicant: LG ELECTRONICS INC.
Inventor： Jeongbin REW , Junho LEE , Chungill LEE
IPC: D06F33/42 , H02P27/08 , H03F3/45 , D06F39/08 , D06F37/30 , D06F34/10 , D06F23/04 , F04D13/06 , F04D15/00
Abstract: The present disclosure relates to a drain pump driving apparatus and a laundry treatment machine including the same. A drain pump driving apparatus according to an embodiment of the present disclosure includes: a converter; a voltage dropper to drop the DC voltage from the converter; an inverter module to operate based on a first voltage from the voltage dropper and to output AC voltage converted by a switching operation to a drain pump motor; a controller to operate based on a second voltage from the voltage dropper and to control the inverter module; and a voltage adjuster to adjust the level of voltage information of the motor outputted from the inverter module and to output the adjusted voltage information to the controller. Accordingly, it is possible to stably drive the drain motor.
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公开(公告)号：US20210234494A1
公开(公告)日：2021-07-29
申请号：US17258149
申请日：2019-07-05
Applicant: LG ELECTRONICS INC.
Inventor： Jieon KIM , Jeongbin REW , Junho LEE
Abstract: The present disclosure relates to a drain pump driving apparatus and a laundry treatment machine including the same. A drain pump driving apparatus according to an embodiment of the present disclosure includes: a converter; an inverter to output converted AC voltage to a drain pump motor; an output current detector to detect an output current flowing in the motor; and a controller to control the inverter, wherein in case in which the speed of the motor increases and the output current flowing in the motor decreases during a predetermined period among an operation period of the drain motor, the controller controls the inverter to be turned off. Accordingly, it is possible to protect internal circuit elements in case the motor loses its synchronism.
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