Motor driving apparatus, home appliance including the same, and mobile terminal

A motor driving apparatus comprising:

• a memory storing diagnostic data corresponding to sound;
• a communication unit to receive data from a mobile terminal;
• an inverter having a plurality of switching devices, wherein the inverter:
• converts a direct current (DC) power into an alternating current (AC) power according to switching of the switching devices;
• and
• supplies the AC power to a motor;
• and
• a controller to control the inverter, wherein, when a diagnostic data request is received from the mobile terminal, the controller;
• changes a switching frequency of the switching devices of the inverter such that the sound corresponding to the diagnostic data stored in the memory is output;
• transforms a frequency of the sound into a frequency-transformed audio signal;
• inserts the diagnostic data into the audio signal;
• inversely transforms the audio signal containing the diagnostic data;
• multiplexes the inversely transformed audio signal;
• and
• further changes the switching frequency of the switching devices of the inverter based on the multiplexed audio signal.

A home appliance comprising:

• a motor;
• an inverter having a plurality of switching devices, wherein the inverter:
• converts a direct current (DC) power into an alternating current (AC) power according to switching of the switching devices;
• and
• supplies the AC power to a motor;
• and
• a controller to control the inverter, wherein the controller:
• performs a first control operation such that a switching frequency of the switching devices of the inverter remains constant in a first operation mode of the motor;
• changes the switching frequency of the switching devices of the inverter in a second operation mode corresponding to a sound output mode for fault diagnosis;
• outputs sound corresponding to the changed switching frequency, wherein the sound contains diagnostic data;
• transforms a frequency of the sound into a frequency-transformed audio signal;
• inserts the diagnostic data into the audio signal;
• inversely transforms the audio signal containing the diagnostic data;
• multiplexes the inversely transformed audio signal;
• and
• further changes the switching frequency of the switching devices of the inverter based on the multiplexed audio signal.