3 1 motor driving device including a single inverter for a one phase motor and a three phases motor and an applicance having the same

摘要

The present invention relates to a driving device for driving a plurality of motors, in particular three-phase and one-phase motors using a single inverter, and a home appliance including the same. According to an embodiment of the present invention, an upper switching element and a lower switching element constitute a pair of switching units, and a three-phase motor through an inverter having a total of three pairs of switching units and a connection point (neutral end) of the vertically divided DC-link capacitors. In the motor driving device provided to control the parallel operation and the 1-phase motor, Two pairs of switching units (three-phase switching units) are provided to be connected to a phase a terminal and a phase b terminal of a three-phase motor, and the neutral terminal is connected to a phase c terminal of the three-phase motor, and the three-phase switching Controlling the driving of the three-phase motor by means of the unit, Another pair of switching units (1-phase switching unit) is connected to the first terminal of the 1-phase motor, and the second terminal of the 1-phase motor is connected to the neutral terminal, and the 1-phase motor is connected by the 1-phase switching unit. Control the driving of When the one-phase motor and the three-phase motor are simultaneously driven, the one-phase motor and the three-phase motor are interlocked and controlled to be driven in parallel through the one-phase switching unit and the three-phase switching unit. I can.