Cleaning device having vacuum cleaner and docking station and method of controlling the same

A cleaning device comprising:

• a vacuum cleaner including a dust collecting container;
• and
• a docking station to which the dust collecting container is connectable thereto and separable therefrom,
• wherein the docking station comprises:
• a suction fan configured to move air from the dust collecting container into the docking station,
• a motor configured to rotate the suction fan,
• a collector configured to collect a foreign substance that is moved together with the air,
• a sensor configured to detect connection of the dust collecting container to the docking station, and
• at least one processor configured to:
• control to operate the motor based on detection of the connection of the dust collecting container to the docking station by the sensor, and
• control a pulse width of a supply voltage supplied to the motor while the motor is being controlled to operate to change a rotation speed of the motor, so that an internal pressure of the dust collecting container connected to the docking station changes, and
• wherein the at least one processor is configured to control the pulse width of the supply voltage to provide a voltage of a first pulse width during a first time section, and to supply a voltage of a second pulse width during a second time section to change the rotation speed of the motor.