Electronic device for performing bottom-up power line communication and method for operating same

1 . An electronic device comprising a main body and a kit connected to the main body,

wherein the main body comprises a battery, a first motor, an electric wire connected to the battery, and a first controller connected to the electric wire,

the kit comprises a second motor supplied with power through the electric wire, an inverter connected to the second motor, and a second controller connected to the electric wire and configured to control driving of the inverter, and

the second controller is configured to transmit information to the first controller through switching frequency control of the inverter and control a switching frequency of the inverter so that a current associated with the second motor is greater than zero in a section in which transmission of the information is performed.

2 . The electronic device of claim 1 , wherein the main body further comprises a low pass filter circuit of which one side is connected to the electric wire and another side is connected to the first controller, and

the first controller is configured to control an operation of the kit based on an output value of the low pass filter circuit.

3 . The electronic device of claim 1 , wherein the second controller is configured to control the switching frequency so that a current flowing through the electric wire includes a sinusoidal component, and

the information is transmitted based on a property of the sinusoidal component.

4 . The electronic device of claim 1 , wherein the second controller is configured to control the switching frequency of the inverter so that the current associated with the second motor is zero in at least a partial section in a period in which the transmission of the information is not performed.

5 . The electronic device of claim 1 , wherein the second controller is configured to control the second motor based on a pulse width modulation (PWM) duty value on the switching signal of the inverter determined based on at least one value of a voltage, a resistance, and an inductance of the second motor.

6 . The electronic device of claim 1 , wherein the second controller is configured to control the second motor so that a difference between an output voltage of the battery and a voltage corresponding to the second motor is maintained to be a predesignated value or more.

7 . The electronic device of claim 1 , wherein when a difference between an output voltage of the battery and a voltage corresponding to the second motor is less than a predesignated value, the second controller is configured to control a driving voltage of the second motor.

8 . The electronic device of claim 1 , wherein the second controller is configured to control a voltage corresponding to the second motor in response to a difference between an output voltage of the battery and the voltage corresponding to the second motor being less than a predesignated value.

9 . The electronic device of claim 1 , wherein the second controller is configured to control a voltage corresponding to the second motor to be decreased in response to a difference between an output voltage of the battery and the voltage corresponding to the second motor being less than or equal to a predetermined value.

10 . The electronic device of claim 1 , wherein the second controller is configured to transmit information to the first controller through a current flowing through the electric wire being shaped through control of the switching frequency.

11 . The electronic device of claim 1 , wherein the information transmitted to the first controller includes at least one of identification information on the kit, operation information on the second motor, use time information on the kit, sensing information on an object adjacent to the kit, and revolutions per minute (RPM) information on the second motor.

12 . The electronic device of claim 1 , wherein the kit is detachable from the main body and further includes a sensor sensing whether the kit is detached from the main body, and

the second is configured to transmit data to the first controller based on the coupling with the main body being sensed and the current shaping method.

13 . An operation method of an electronic device comprising a main body and a kit connected to the main body, the operation method comprising:

controlling a switching frequency of an inverter included in the kit; and

transmitting information from the kit to the main body based on control of the switching frequency,

wherein the main body comprises a battery, a first motor, an electric wire connected to the battery, and a first controller connected to the electric wire,

the kit comprises a second motor supplied with power through the electric wire, the inverter connected to the second motor, and a second controller connected to the electric wire and configured to control driving of the inverter, and

a current associated with the second motor is greater than zero in a section in which transmission of the information is performed through the control of the switching frequency.

14 . The operation method of claim 13 , wherein a current flowing through the electric wire includes a sinusoidal component,

the information is transmitted based on a property of the sinusoidal component, and

the method further comprises controlling the second motor so that a difference between an output voltage of the battery and a voltage corresponding to the second motor is maintained to be a predetermined value or more.

15 . The operation method of claim 13 , wherein the information transmitted to the first controller includes at least one of identification information on the kit, operation information on the second motor, use time information on the kit, sensing information on an object adjacent to the kit, and revolutions per minute (RPM) information on the second motor.