Motor drive system for a household appliance

A motor drive system for a household appliance or a laundry cleaning device, the motor drive system comprising:

• a controller, a motor drive module, a motor, and a winding switching module;
• said motor including a three-phase winding, each phase winding including at least two winding units;
• said motor drive module configured to drive said motor to operate based on a control instruction of said controller;
• and
• said winding switching module connected to said controller, to said motor drive module and to said motor, said winding switching module configured to obtain an operating mode of the laundry cleaning device from said controller and to control a type of connection of said winding units in said three-phase winding based on the operating mode;
• said winding switching module including a series control module, a parallel control module, and an isolation module;
• said series control module configured to control said winding units in said three-phase winding to implement series connection in a disabled state of said parallel control module;
• said parallel control module configured to control said winding units in said three-phase winding to implement parallel connection through said isolation module in a disabled state of said series control module;
• said series control module including three series-connected switch units, and each of said series-connected switch units being connected in series between an adjacent two of said winding units in a corresponding winding;
• said isolation module including three isolation units connected in parallel;
• each of said isolation units including two diodes connected in series, forming a connection terminal of said two diodes serving as an isolation terminal;
• each isolation terminal being connected to an end of said series-connected switch unit;
• and
• different isolation terminals being connected to different series-connected switch units.