Driving apparatus for direct-drive type washing machine

A driving apparatus for a direct-drive type washing machine, the driving apparatus comprising:

• a support member that is fixed to a lower side of a washing tub;
• a dehydrating tub rotating shaft that is rotatably supported on the support member and that is connected to a dehydrating tub to rotate the dehydrating tub, the dehydrating tub being arranged inside the washing tub;
• a pulsator rotating shaft that is rotatably arranged inside the dehydrating tub rotating shaft and that is connected to a pulsator to rotate the pulsator, the pulsator being arranged inside the dehydrating tub;
• a drive motor comprising a double rotor including an outer rotor that is connected to the pulsator rotating shaft and an inner rotor that is connected to the dehydrating tub rotating shaft, and a double stator including a first stator coil for rotating the outer rotor and a second stator coil for rotating the inner rotor;
• a single inverter that generates a three-phase alternating-current (AC) power to be applied to the first stator coil and the second stator coil;
• and
• a first rotor drive controller provided between the single inverter and the second stator coil, wherein the first rotor drive controller is configured to block or pass the three-phase AC power being applied to the second stator coil under control of a motor controller, to thus control driving of the inner rotor;
• a second rotor drive controller that is provided between the single inverter and the first stator coil, and that is configured to block or pass an application of the three-phase AC power to the first stator coil under the control of the motor controller, to thus control driving of the outer rotor,
• wherein the first rotor drive controller is further configured to change direction of rotation of the inner rotor in case of performing a washing or rinsing mode, so that the inner rotor rotates in opposite direction to that of the outer rotor.