Power supply device, electronic device including same, and power supply method

Abstract

The present disclosure provides a power supply device, an electronic device including the power supply device, and a power supply method. The electronic device comprises: a motor; a power supply device for receiving AC power to generate DC power; a motor driver for receiving the DC power and generating driving power to provide the driving power to the motor; and a processor for providing the motor driver with a control signal for controlling the motor. The power supply device comprises: a rectifier circuit for rectifying the AC power; a PFC converter unit for matching voltage and current of the rectified AC power in the same phase; and an inverter unit for transforming output power of the PFC converter unit into power of a preconfigured first magnitude, and outputting the transformed power, wherein the PFC converter unit identifies a harmonic component of the current rectified by the rectifier circuit, and matches the voltage and current of the rectified AC power in the same phase on the basis of the identified harmonic component.

Description

Power supply, electronic device including same, and power supply method

[0001] The present disclosure relates to a power supply, an electronic device including the same, and a power supply method. Specifically, the present disclosure relates to a power supply including a PFC converter for power factor improvement and a control method thereof.

[0002] A PFC converter is a converter that converts the input current into a sine wave of the same phase as the input voltage, thereby improving the power factor value between the input current and the input voltage (in particular, converting the input current so that the power factor value between the input current and the input voltage becomes 1).

[0003] Referring to Figure 1, when using an electronic device, an input current containing harmonic components may be applied to the PFC converter. This input current containing harmonic components may cause noise, heat generation, and vibration in the electronic device. There are various reasons why the input current of the PFC converter contains harmonic components, such as design errors in the inductor within the PFC converter and wear and tear on electronic components within the electronic device.

[0004] However, most of the sources of input current containing these harmonic components arise post-process during the use of electronic devices. Previous solutions to this problem have been limited to replacing inductors or worn electronic components in electronic devices, or redesigning electronic devices according to the rated voltage of the country in which they are used.

[0005] An electronic device according to one embodiment of the present disclosure includes a motor, a power supply unit that receives AC power and generates DC power, a motor driver that receives the DC power and generates and provides driving power to the motor, and a processor that provides a control signal for controlling the motor to the motor driver. Here, the power supply unit includes a rectifier circuit that rectifies the AC power, a PFC converter unit that matches the voltage and current of the rectified AC power to be in-phase, and an inverter unit that transforms the output power of the PFC converter unit into a power of a first preset magnitude and outputs it, wherein the PFC converter unit identifies a harmonic component of a current rectified by the rectifier circuit and matches the voltage and current of the rectified AC power to be in-phase based on the identified harmonic component.

[0006] Here, the PFC converter unit may include at least one switch connected in parallel to the rectifier circuit, a first detection unit that detects the magnitude and phase of the voltage rectified in the rectifier circuit, a second detection unit that confirms the harmonic component of the current rectified in the rectifier circuit, and a controller that generates a control signal for controlling the at least one switch based on the magnitude of the detected voltage, the phase of the detected voltage, and the confirmed harmonic component.

[0007] Here, the second detection unit can check the harmonic components above a preset frequency among the current rectified in the rectifier circuit and the size information of the harmonic components.

[0008] Here, the second detection unit may include a high-pass filter unit that filters a band below the preset frequency and a calculation unit that calculates an average value using output information of the high-pass filter unit.

[0009] Here, the preset frequency can have a value of 1Khz or more.

[0010] The controller can generate a control signal so that the current rectified in the rectifier circuit has the same phase as the phase of the identified voltage and the identified harmonic component is canceled.

[0011] Here, the controller can generate a control signal to cancel out the identified harmonic component based on any one of the P control method, the PI control method, and the PID control method.

[0012] Additionally, the control signal may be a PWM signal.

[0013] Additionally, the PFC converter unit may include an inductor having one end connected to an output terminal of the rectifier circuit and the other end connected to the at least one switch.

[0014] A power supply device according to one embodiment of the present disclosure includes a rectifier circuit for rectifying AC power, a PFC converter unit for matching the voltage and current of the rectified AC power to be in-phase, and an inverter unit for transforming the output power of the PFC converter unit into a power of a first preset magnitude and outputting the transformed power. The PFC converter unit identifies a harmonic component of the current rectified by the rectifier circuit, and matches the voltage and current of the rectified AC power to be in-phase based on the identified harmonic component.

[0015] Here, the PFC converter unit may include at least one switch connected in parallel to the rectifier circuit, a first detection unit that detects the magnitude and phase of the voltage rectified in the rectifier circuit, a second detection unit that confirms the harmonic component of the current rectified in the rectifier circuit, and a controller that generates a control signal for controlling the at least one switch based on the magnitude of the detected voltage, the phase of the detected voltage, and the confirmed harmonic component.

[0016] Here, the second detection unit can check the harmonic components higher than a preset frequency among the current rectified in the rectifier circuit and the size information of the harmonic components.

[0017] Here, the second detection unit may include a high-pass filter unit that filters a band below the preset frequency and a calculation unit that calculates an average value using output information of the high-pass filter unit.

[0018]

[0019] *18 A method for controlling an electronic device according to an embodiment of the present disclosure includes the steps of rectifying AC power through a rectifier circuit of the electronic device, selectively outputting the rectified AC power using a PFC converter unit that matches the voltage and current of the rectified AC power to be in-phase, transforming the output voltage of the PFC converter unit into a power of a first preset magnitude and outputting it, and providing a first control signal for controlling a motor of the electronic device to a motor driver of the electronic device based on the power of the first preset magnitude, wherein the selectively outputting step includes the steps of checking a harmonic component of the rectified current, generating a second control signal that matches the voltage and current of the rectified AC power to be in-phase based on the checked harmonic component, and providing the generated second control signal to a switch that selectively outputs the rectified AC power.

[0020] Here, the step of confirming may include a step of confirming a harmonic component higher than a preset frequency among the current rectified in the rectifier circuit and information on the magnitude of the harmonic component, and the step of generating the second control signal may include a step of calculating an average value corresponding to the harmonic component based on the confirmed information on the magnitude of the harmonic component, and generating a control signal for matching the voltage and current of the rectified AC power source to be in phase based on the calculated average value.

[0021] Here, the preset frequency may be 1Khz or higher.

[0022] Additionally, the second control signal may be a PWM signal for controlling at least one switch connected in parallel to the rectifier circuit.

[0023]

[0024] *22 A non-transitory computer-readable recording medium storing computer instructions that, when executed by a processor of an electronic device according to one embodiment of the present disclosure, cause the electronic device to perform an operation, the operation includes the steps of rectifying AC power through a rectifier circuit of the electronic device, selectively outputting the rectified AC power using a PFC converter unit that matches the voltage and current of the rectified AC power to be in-phase, transforming the output voltage of the PFC converter unit into a power of a first preset magnitude and outputting it, and providing a first control signal for controlling a motor of the electronic device to a motor driver of the electronic device based on the power of the first preset magnitude, wherein the selectively outputting step includes the steps of checking a harmonic component of the rectified current, generating a second control signal that matches the voltage and current of the rectified AC power to be in-phase based on the checked harmonic component, and providing the generated second control signal to a switch that selectively outputs the rectified AC power.

[0025] Figure 1 is a diagram showing the input current of a PFC converter section including harmonic components.

[0026] FIG. 2 is a block diagram of a power supply device according to an embodiment of the present disclosure.

[0027] FIG. 3 is an exemplary diagram of a power supply device according to one embodiment of the present disclosure.

[0028] FIG. 4 is a control block diagram showing the configuration of a second detection unit according to an embodiment of the present disclosure.

[0029] FIG. 5 is a diagram showing an input current with harmonic components removed according to a control signal of a PFC converter according to an embodiment of the present disclosure.

[0030] FIG. 6 is a schematic diagram of an electronic device including a power supply device according to an embodiment of the present disclosure.

[0031] FIG. 7 and FIG. 8 are flowcharts schematically illustrating a power supply method according to one embodiment of the present disclosure.

[0032] The present embodiments may be modified and have various embodiments. Therefore, specific embodiments are illustrated in the drawings and described in detail in specific details for carrying out the invention. However, this is not intended to limit the scope to specific embodiments, and it should be understood that various modifications, equivalents, and / or alternatives of the embodiments of the present disclosure are included. In connection with the description of the drawings, similar reference numerals may be used for similar components.

[0033] In describing the present disclosure, if it is determined that a specific description of a related known function or configuration may unnecessarily obscure the gist of the present disclosure, a detailed description thereof will be omitted.

[0034] Additionally, the following embodiments may be modified in various other forms, and the scope of the technical concepts of the present disclosure is not limited to the following embodiments. Rather, these embodiments are provided to further faithfully and completely convey the technical concepts of the present disclosure to those skilled in the art.

[0035] The terminology used in this disclosure is for the purpose of describing specific embodiments only and is not intended to limit the scope of the rights. Singular expressions include plural expressions unless the context clearly dictates otherwise.

[0036] In this disclosure, expressions such as “has,” “can have,” “includes,” or “may include” indicate the presence of a corresponding feature (e.g., a component such as a number, function, operation, or part), and do not exclude the presence of additional features.

[0037] In this disclosure, expressions such as “A or B,” “at least one of A and / or B,” or “one or more of A or / and B” can include all possible combinations of the listed items. For example, “A or B,” “at least one of A and B,” or “at least one of A or B” can all refer to (1) including at least one A, (2) including at least one B, or (3) including both at least one A and at least one B.

[0038] The expressions “first,” “second,” “first,” or “second,” etc., used in this disclosure can describe various components, regardless of order and / or importance, and are only used to distinguish one component from another, but do not limit the components.

[0039] When it is said that a component (e.g., a first component) is “(operatively or communicatively) coupled with / to” or “connected to” another component (e.g., a second component), it should be understood that said component may be directly coupled to said other component, or may be coupled via another component (e.g., a third component).

[0040] On the other hand, when it is said that a component (e.g., a first component) is "directly connected" or "directly connected" to another component (e.g., a second component), it can be understood that no other component (e.g., a third component) exists between said component and said other component.

[0041] The expression "configured to" as used in the present disclosure may be used interchangeably with, for example, "suitable for," "having the capacity to," "designed to," "adapted to," "made to," or "capable of." The term "configured to" may not necessarily mean only "specifically designed to" in terms of hardware.

[0042] Instead, in some contexts, the phrase "a device configured to" may mean that the device, in conjunction with other devices or components, is "capable of" performing A, B, and C. For example, the phrase "a processor configured (or set) to perform A, B, and C" may refer to a dedicated processor (e.g., an embedded processor) for performing those operations, or a general-purpose processor (e.g., a CPU or application processor) that can perform those operations by executing one or more software programs stored in a memory device.

[0043] In the embodiments, a 'module' or 'part' performs at least one function or operation, and may be implemented as hardware or software, or as a combination of hardware and software. Furthermore, a plurality of 'modules' or 'parts' may be integrated into at least one module and implemented as at least one processor, except for a 'module' or 'part' that needs to be implemented as a specific hardware.

[0044] Meanwhile, the various elements and areas in the drawings are schematically drawn. Therefore, the technical concept of the present invention is not limited by the relative sizes or spacing depicted in the attached drawings.

[0045] Hereinafter, with reference to the attached drawings, embodiments according to the present disclosure will be described in detail so that a person having ordinary knowledge in the technical field to which the present disclosure pertains can easily implement the present disclosure.

[0046] FIG. 2 is a block diagram of a power supply device (110) according to one embodiment of the present disclosure.

[0047] Referring to FIG. 2, the power supply unit (110) may include a rectifier unit (111), a PFC converter unit (112), and an inverter unit (113). The power supply unit (110) may be included in an electronic device (100) and may be a device that supplies power to the electronic device (100). In this case, the electronic device (100) may be implemented as various electronic devices (100), such as an air conditioner, a washing machine, a dryer, and a circulator, which include a motor.

[0048] The rectifier (111) rectifies the AC power input to the power supply (110). Specifically, the rectifier (111) can rectify the voltage of an AC signal whose direction changes at a preset cycle into a unidirectional DC voltage. For example, it can rectify an externally applied AC voltage (220 V, 60 Hz) into a DC voltage. The rectifier (111) may further include a smoothing unit (not shown) that smoothes the rectified DC voltage.

[0049] FIG. 3 is an exemplary diagram of a power supply according to an embodiment of the present disclosure. In FIG. 3, the PFC converter unit (112) is illustrated as a Boost PFC topology, but this is only an example, and the PFC converter unit (112) may be implemented as various other PFC topologies, such as an Interleaved Boost PFC topology and a Totem-Pole PFC topology.

[0050] The rectifier (111) may be implemented as a rectifier circuit. Specifically, as illustrated in FIG. 3, the rectifier (111) may be implemented as a full-bridge full-wave rectifier circuit. The rectifier (111) is electrically connected to the PFC converter (112), and the input voltage rectified by the rectifier (111) may be applied to the PFC converter (112).

[0051] The PFC converter unit (112) converts the rectified input voltage. Specifically, the PFC converter unit (112) receives the rectified voltage (or current) from the rectifier unit (111) and can convert the size of the input voltage (or current) through a converting operation.

[0052] In addition, the PFC converter unit (112) aligns the phase of the input voltage rectified through the rectifier unit (111) with the phase of the input current input as the input voltage is applied. For example, when an AC voltage of 220 Vrms and 60 Hz (i.e., input voltage) is applied, the PFC converter unit (112) can convert the input current rectified by the rectifier unit (111) into a 60 Hz current having the same phase as the applied AC voltage (i.e., input voltage). Accordingly, the PFC converter unit (112) can reduce the loss of the power supply unit (110) (or the electronic device (100) including the power supply unit (110)) due to reactive power and increase power efficiency. That is, the PFC converter unit (112) can improve the power factor of the electronic device (100) including the power supply unit (110).

[0053] This PFC converter unit (112) can be used in electronic devices to meet harmonic regulations set by the power supplying organization.

[0054] The inverter unit (113) converts the output power of the PFC converter unit (112) into a power of a preset first magnitude and outputs it. Specifically, the inverter unit (113) can receive the voltage (or current) output by the PFC converter unit (112) and then convert it into a voltage (or current) of a preset first magnitude and output it. For example, the inverter unit (113) can convert the voltage varied by the switching operation of the PFC converter unit (112) into an AC signal (e.g., voltage or current) for driving a motor included in the electronic device (100).

[0055] To this end, the inverter unit (113) may include at least one switch, and at this time, through a switching operation of at least one switch included in the inverter unit (113), the power input to the inverter unit (113) (i.e., the output voltage (or current) applied through the PFC converter unit (112)) may be converted into AC power of a preset first magnitude. Here, the preset first magnitude may be set based on a rated voltage set according to an electronic device (100) including or connected to the power supply device (110).

[0056] Meanwhile, the motor may be a component that provides power to rotate a fan or the like included in the electronic device (100). For example, if the electronic device (100) is implemented as an air conditioner, the motor may be connected to an outdoor fan of the electronic device (100) to rotate the outdoor fan, thereby discharging outdoor air or compressing refrigerant in the compressor. Meanwhile, the motor may include a stepping motor, a servo motor, a DC motor, or the like.

[0057] Referring to FIG. 3, the PFC converter unit (112) may further include an inductor (11) having one end connected to an output end of a rectifier circuit and the other end connected to at least one switch (12). An input current rectified through a rectifier circuit is applied to the inductor (11).

[0058] At least one switch (12) connected to the other end of the inductor (11) can be turned ON / OFF by a control signal of the PFC converter unit (112). In particular, at least one switch (12) can be turned ON / OFF by a pulse width modulation (PWM) signal generated based on a control signal output from a controller (15) of the PFC converter. Hereinafter, a controller that outputs a control signal for at least one switch (12) will be referred to as a first controller (15).

[0059] When at least one switch (12) is turned ON, the output voltage (i.e., DC voltage) of the PFC converter unit (112) can be boosted. At this time, when at least one switch (12) is turned ON, the voltage applied to the resistor connected to the other end of at least one switch (12) is also boosted, and accordingly, the input current (or inductor current (I L )) may increase.

[0060] Meanwhile, when at least one switch (12) is turned OFF, the output voltage (i.e., DC voltage) of the PFC converter unit (112) can be stepped down. Specifically, when at least one switch (12) is turned OFF, no voltage is applied to the resistor connected to the other end of at least one switch (12), and accordingly, the input current (or inductor current (I L )) can be reduced.

[0061] In this way, the PFC converter unit (112) controls the input current to increase and decrease repeatedly by repeatedly turning on and off at least one switch (12) based on a pulse width modulation signal output from the first controller (15), and can match the phase of the input current with the phase of the input voltage.

[0062] Meanwhile, at least one switch (12) may be implemented as a power semiconductor switch. For example, at least one switch (12) may be implemented by a JFET, an IGBT, a BJT, etc.

[0063] Meanwhile, the PFC converter unit (112) can check the harmonic components of the current rectified in the rectifier circuit and match the voltage and current of the rectified AC power in phase based on the checked harmonic components.

[0064] Specifically, the PFC converter unit (112) can check the harmonic components of the input current input through the inductor (11) after being rectified in the rectifier circuit. Here, the harmonics may be a frequency that is a multiple of n (n is a natural number greater than or equal to 2) of the frequency of the output current. At this time, the PFC converter unit (112) can check the high-order harmonic components of the input current and generate a control signal that controls at least one switch (12) so that the checked high-order harmonic components are canceled out from the input signal.

[0065] To offset the harmonic components of the input current, the PFC converter unit (112) may include a first detection unit (13), a second detection unit (14), and a first controller (15).

[0066] The first detection unit (13) can detect the magnitude and phase of the voltage rectified in the rectifier circuit. In particular, the first detection unit (13) can include a phase estimator (310) and a voltage controller (320).

[0067] The phase estimator (310) estimates the phase for the input voltage, and can identify the phase of the input voltage in real time.

[0068] The voltage controller (320) can receive a DC voltage, which is an output voltage of the PFC converter, and a reference voltage, and output a signal for generating a reference current of the controller (15). The signal output by the voltage controller (320) can be used as a reference current, which is an input of the first controller (15). Specifically, a value obtained by multiplying the absolute value of the sine value corresponding to the phase of the input voltage identified by the phase estimator (310) and the output signal of the voltage controller (320) can be input as the reference current of the first controller (15). That is, the reference current can be generated based on the phase of the input voltage.

[0069] The first controller (15) can output a control signal to turn on / off at least one switch (12) so that the input current can follow the command current after receiving the command current and the input current. At this time, the control signal can include compensation information for the input current so that the input current can follow the command current. Therefore, the first controller (15) can also be referred to as a current controller (15). Meanwhile, the first controller (15) can output a compensation value for the input current according to any one of the P control method, the PI control method, and the PID control method.

[0070] The control signal output by the first controller (15) can be input to a PWM signal generator and converted into a PWM signal that controls at least one switch (12). When the PWM signal is applied to at least one switch (12), at least one switch (12) can be turned ON / OFF. And, as at least one switch (12) repeats ON / OFF, the input current applied to the inductor (11) (or the inductor (11) current) can also follow the command current while repeating increasing and decreasing. Accordingly, the phase of the input current can be adjusted to be in-phase with the phase of the input voltage.

[0071] The control signal output from the first controller (15) may include not only compensation information for the input current to follow the command current, but also compensation information for canceling out harmonic components of the input current. In particular, the compensation information for canceling out harmonic components of the input current may be acquired by the second detection unit (14).

[0072] The second detection unit (14) can identify the harmonic components of the input current rectified in the rectifier circuit. Furthermore, the second detection unit (14) can obtain compensation information for the input current to offset the harmonic components included in the input current based on the identified harmonic components. Accordingly, the second detection unit (14) can include a controller (15). Meanwhile, the second detection unit (14) can transmit the obtained compensation information to the first controller (15).

[0073] Accordingly, the first controller (15) can output a control signal for at least one switch (12) based on the input current and the command current, and the compensation information transmitted from the second sensing unit (14) for the input current to follow the command current.

[0074] Hereinafter, the second detection unit (14) will be described in detail with reference to FIG. 4. FIG. 4 is a control block diagram showing the configuration of the second detection unit (14) according to one embodiment of the present disclosure.

[0075] Referring to FIG. 4, the second detection unit (14) may include a high pass filter (410) and an output unit.

[0076] Here, the high-pass filter (410) can filter a preset frequency band of the input current. Since the harmonic components included in the input current correspond to a high-frequency band, only the harmonic components included in the input current can pass through the high-pass filter (410), and the remaining components other than the harmonic components can be blocked by the high-pass filter (410). At this time, the cut-off frequency set in the high-pass filter (410) can be set to a value lower than the switching frequency of at least one switch (12).

[0077] For example, the cutoff frequency set in the high pass filter (410) may have a value of 1 kHz or higher. Accordingly, frequency components below 1 kHz included in the input current input to the second detection unit (14) are cut off by the high pass filter (410), and frequency components exceeding 1 kHz may be transmitted to the output unit after passing through the high pass filter (410). For example, the cutoff frequency of the high pass filter (410) may be 5 kHz.

[0078] Meanwhile, according to one embodiment of the present disclosure, the high-pass filter (410) may be implemented as a band-pass filter. In this case, the band-pass filter can pass only harmonic components within a preset frequency band included in the input current.

[0079] The output unit can calculate the average value using the output information of the high pass filter (410). Specifically, as the input current passes through the high pass filter (410), the output unit can receive the harmonic components included in the input current and calculate the average value of the received harmonic components. To this end, referring to FIG. 4, the output unit can obtain an RMS (Root Mean Square) value for the harmonic components and pass the obtained RMS value through a low pass filter (430) to obtain an average value for the harmonic components.

[0080] Meanwhile, the second detection unit (14) may further include a controller (440). Here, the controller (440) included in the second detection unit (14) may output a compensation value for removing harmonic components of the input current. Hereinafter, the controller included in the second detection unit (14) will be referred to as the second controller (440).

[0081] The second controller (440) can identify a compensation value for removing the average value of the harmonic components of the input current obtained through the high pass filter (410) and the output unit. To this end, the second controller (440) can receive a command value of “0” and the average value of the harmonic components of the input current, and then obtain compensation information for the input current for canceling out the harmonic components. Specifically, the second controller (440) can calculate and output a compensation value that makes the average value of the harmonic components become the command value of “0.” In addition, the second detection unit (14) can obtain the compensation value output through the second controller (440) and transmit the obtained compensation value to the first controller (15).

[0082] At this time, the second controller (440) can output a compensation value according to any one of the P control method, the PI control method, and the PID control method. In addition, the first controller (15) can generate a control signal to cancel out harmonic components included in the input current and to match the phase of the input current with the phase of the input voltage based on the compensation value obtained based on the compensation value received from the second controller (440) and the command current and input current input to the first controller (15). In addition, a PWM signal for controlling at least one switch (12) can be generated through the PWM generator (16) based on the control signal generated by the first controller (15).

[0083] Meanwhile, the duty ratio of the PWM signal can be changed so that the input current can follow the command current, and also, if the input current contains harmonic components, the duty ratio can be changed so that the harmonic components can be removed.

[0084] FIG. 5 is a diagram showing an input current with harmonic components removed according to a control signal of a PFC converter according to an embodiment of the present disclosure.

[0085] Referring to FIG. 5, when the PFC converter unit (112) according to an embodiment of the present disclosure including the second detection unit (14) is not used, harmonic components are repeatedly included in the input current. This is because the PFC converter unit (112) controls the input current without reflecting compensation information for the harmonic components obtained through the second detection unit (14). However, when the PFC converter unit (112) according to an embodiment of the present disclosure including the second detection unit (14) and controlling the input current based on compensation information for the harmonic components of the input current obtained through the second detection unit (14) is used, harmonic components can be removed from the input current.

[0086] FIG. 6 is a configuration diagram of an electronic device (100) including a power supply device (110) according to one embodiment of the present disclosure.

[0087] According to one embodiment of the present disclosure, the electronic device (100) may be implemented as various electronic devices (100) including a motor for an air conditioner, an air conditioner, etc. Hereinafter, an electronic device (100) according to one embodiment of the present disclosure implemented as an air conditioner will be described.

[0088] Referring to FIG. 6, the electronic device (100) includes a power supply unit (110), an indoor unit (120), an outdoor unit (130), a motor driver (140), a user interface (150), one or more sensors (160), a memory (170), a communication interface (180), and one or more processors (190). In addition, the indoor unit (120) includes an indoor heat exchanger (121) and an indoor fan (122), and the outdoor unit (130) includes an outdoor heat exchanger (131), a compressor (132), an outdoor fan (133), and a motor (134). The power supply unit (110) (and the rectifier (111), the PFC converter unit (112), and the inverter unit (113)) illustrated in FIG. 6 are equally applicable to the embodiments of the present disclosure described based on FIGS. 2 to 5, and therefore, a detailed description thereof will be omitted.

[0089] The electronic device (100) may include an indoor unit (120) and an outdoor unit (130). Specifically, the electronic device (100) may include an outdoor unit (130) that exchanges heat with outside air using a refrigerant, and an indoor unit (120) that exchanges refrigerant with the outdoor unit and performs an indoor air conditioning operation.

[0090] The indoor unit (120) is connected to the outdoor unit (130) and can exchange refrigerant. At this time, the indoor unit (120) can be connected to the outdoor unit (130) through a pipe for refrigerant exchange. When liquefied refrigerant flows into the indoor unit (120) from the outdoor unit (130), the indoor unit (120) vaporizes the liquefied refrigerant through an evaporator (not shown). Then, when the indoor fan (122) included in the indoor unit (120) is driven to draw in outside air into the indoor unit, the indoor unit (120) discharges cooled air generated through heat exchange between the outside air and the refrigerant.

[0091] Meanwhile, the outdoor unit (130) changes the refrigerant into a compressed, high-temperature, high-pressure liquefied state through the compressor (132). Then, the outdoor unit (130) sucks in outdoor air using the outdoor fan (133) provided in the outdoor unit (130). When the temperature of the liquefied refrigerant is lowered by the sucked outdoor air, the outdoor unit (130) discharges the liquefied refrigerant to the indoor unit (120) through a pipe for refrigerant exchange. Meanwhile, an expansion valve may be provided in the pipe for refrigerant exchange. At this time, the refrigerant passing through the pipe provided with the expansion valve may be changed into a state in which it is easy to evaporate due to a lowered density and pressure.

[0092] The indoor heat exchanger (121) exchanges heat between the air introduced into the electronic device (100) and the refrigerant provided from the outdoor unit. Specifically, the indoor heat exchanger (121) may also function as an evaporator (not shown) during cooling. That is, the indoor heat exchanger (121) may absorb latent heat required for the phase transition of the refrigerant, which is in a low-pressure, low-temperature, mist state, into a gas, from the air introduced into the indoor unit (120).

[0093] On the other hand, the indoor heat exchanger (121) can function as a condenser during heating. That is, when the flow of refrigerant is reversed as opposed to cooling, the heat of the refrigerant passing through the indoor heat exchanger (121) can be released to the air introduced into the indoor unit.

[0094] In the outdoor heat exchanger (131), heat exchange is performed between the high-temperature, high-pressure gaseous refrigerant compressed by the compressor (132) and the outdoor air sucked in through the outdoor fan (133). The outdoor fan (133) may be configured to forcibly discharge the outdoor air by a motor (134) connected to the outdoor fan (133) so that heat exchange is performed in the outdoor heat exchanger (131). The outdoor fan (133) may be arranged around the outdoor heat exchanger (131) so that mutual heat exchange between the refrigerant circulating in the outdoor heat exchanger (131) and the outside air can be effectively performed. In addition, the rotation speed of the outdoor fan (133) may be changed based on a control signal transmitted from the processor (190).

[0095] Meanwhile, the motor (134) can receive power from the power supply unit (110). Specifically, the motor (134) can rotate as voltage (or current) converted by the inverter unit (113) is applied. In particular, the voltage (or current) applied to the motor (134) can be generated as a voltage varied by the switching operation of the PFC converter unit (112) is converted by the inverter unit (113). In addition, the motor (134) can change the rotation speed and rotation direction based on the control signal of the processor (190) after receiving power from the power supply unit (110). Meanwhile, the compressor (132) can also compress the refrigerant input to the compressor (132) by using the rotational power of the motor (134).

[0096] The indoor fan (122) can suck in air from outside the indoor unit by rotation. Specifically, the indoor fan (122) can suck in air from outside the indoor unit by rotational force generated by driving a motor connected to the indoor fan (122). In addition, the electronic device (100) can drive the indoor fan (122) to discharge cooled air to the outside of the electronic device (100). To this end, according to an embodiment of the present disclosure, the indoor fan (122) can be implemented as a plurality of indoor fans (122), and each indoor fan (122) can perform the function of discharging cooled air to the outside of the electronic device (100) or sucking in air from outside the indoor unit, respectively.

[0097] The motor driver (140) may be configured to be connected to a motor (134) connected to an outdoor fan (133) (or a motor connected to an indoor fan (122)) and transmit a control signal to the motor (134). Specifically, when the motor driver (140) receives a control signal generated according to a user input from the processor (190), the motor driver (140) may control the rotation speed and rotation direction of the motor (134) to correspond to the user command. In particular, the motor driver (140) may control the power applied to the motor (134) to adjust the operation of the motor (134).

[0098] Meanwhile, the motor driver (140) may be implemented as a plurality of drivers that each control a motor (134) connected to an outdoor fan (133) and a motor connected to an indoor fan (122).

[0099] The user interface (150) is a component used to perform interaction between the electronic device (100) and the user, and the processor (190) receives various information, such as control information of the electronic device (100), through the user interface (150). Meanwhile, the user interface (150) may include at least one of a touch sensor, a motion sensor, a button, a jog dial, and a switch, but is not limited thereto.

[0100] The sensor (160) obtains various sensing information about the electronic device (100) and the surroundings of the electronic device (100). For example, the sensor (160) may include a temperature sensor (160), and the temperature sensor (160) detects the temperature around the electronic device (100) and the temperature of the room.

[0101] The memory (170) may store an O / S (Operating System) for operating the electronic device (100). In addition, the memory (170) may store various software programs or applications for operating the electronic device (100) according to various embodiments of the present disclosure. In addition, the memory (170) may store various information, such as various data input, set, or generated during execution of a program or application.

[0102] The communication interface (180) can perform communication with an external device based on a wireless communication network. For example, the communication interface (180) can receive a control command for the electronic device (100) from a control device (e.g., a remote controller, etc.) that is linked to the electronic device (100). The wireless communication network may include, for example, Bluetooth, Bluetooth Low Energy, CAN communication, Wi-Fi, Wi-Fi Direct, ultra-wide band communication (UWB), Zigbee, infrared data association (IrDA), or near field communication (NFC).

[0103] Meanwhile, the electronic device (100) may further include a display. The display may display various visual information related to the electronic device (100). For example, information such as temperature and airflow may be displayed. The display may be implemented in various forms, such as an LCD (Liquid Crystal Display), an OLED (Organic Light Emitting Diodes) display, an LED display, a PDP (Plasma Display Panel), etc. The display may also include a driving circuit, a backlight unit, etc., which may be implemented in forms such as an a-si TFT, an LTPS (low temperature poly silicon) TFT, an OTFT (organic TFT), etc. Meanwhile, the display may be implemented as a touch screen combined with a touch sensor, a flexible display, a 3D display, etc.

[0104] Additionally, according to one embodiment of the present disclosure, the display may include not only a display panel that outputs an image, but also a bezel that houses the display panel. In particular, according to one embodiment of the present disclosure, the bezel may include a touch sensor (not shown) for detecting user interaction.

[0105] One or more processors (190) control the overall operation of the electronic device (100). Specifically, one or more processors (190) are electrically connected to a component included in the electronic device (100) and can control the overall operation of the electronic device (100) by executing at least one command stored in the memory (170).

[0106] In particular, one or more processors (190) may provide a control signal for controlling the motor to the motor driver. Here, the control signal may be a control signal for controlling the rotation speed and rotation direction of the motor (134). In particular, the control signal may be a signal for controlling the operation of the motor (134) to respond to a user input or a preset condition when a user input is received or a preset condition is met.

[0107] The one or more processors (190) may include one or more of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), an Accelerated Processing Unit (APU), a Many Integrated Core (MIC), a Digital Signal Processor (DSP), a Neural Processing Unit (NPU), a hardware accelerator, or a machine learning accelerator. The one or more processors (190) may control one or any combination of other components of the electronic device (100) and perform operations related to communication or data processing. The one or more processors (190) may execute one or more programs or instructions stored in the memory (170). For example, the one or more processors (190) may perform a method according to an embodiment of the present disclosure by executing one or more instructions stored in the memory (170).

[0108] When a method according to an embodiment of the present disclosure includes a plurality of operations, the plurality of operations may be performed by one processor or by a plurality of processors. For example, when a first operation, a second operation, and a third operation are performed by a method according to an embodiment, the first operation, the second operation, and the third operation may all be performed by the first processor, or the first operation and the second operation may be performed by the first processor (e.g., a general-purpose processor) and the third operation may be performed by the second processor (e.g., an artificial intelligence-dedicated processor).

[0109] One or more processors (190) may be implemented as a single core processor including one core, or may be implemented as one or more multicore processors including multiple cores (e.g., homogeneous multicores or heterogeneous multicores). When one or more processors (190) are implemented as a multicore processor, each of the multiple cores included in the multicore processor may include an internal processor memory, such as a cache memory or an on-chip memory (170), and a common cache shared by the multiple cores may be included in the multicore processor. In addition, each of the multiple cores (or some of the multiple cores) included in the multicore processor may independently read and execute a program instruction for implementing a method according to an embodiment of the present disclosure, or all (or some) of the multiple cores may be linked to read and execute a program instruction for implementing a method according to an embodiment of the present disclosure.

[0110] When a method according to an embodiment of the present disclosure includes a plurality of operations, the plurality of operations may be performed by one core among the plurality of cores included in a multi-core processor, or may be performed by the plurality of cores. For example, when a first operation, a second operation, and a third operation are performed by a method according to an embodiment, the first operation, the second operation, and the third operation may all be performed by a first core included in the multi-core processor, or the first operation and the second operation may be performed by a first core included in the multi-core processor, and the third operation may be performed by a second core included in the multi-core processor.

[0111] In an embodiment of the present disclosure, the processor (190) may mean a system on a chip (SoC) in which at least one processor and other electronic components are integrated, a single-core processor, a multi-core processor, or a core included in a single-core processor or a multi-core processor, wherein the core may be implemented as a CPU, a GPU, an APU, a MIC, a DSP, an NPU, a hardware accelerator, or a machine learning accelerator, but the embodiments of the present disclosure are not limited thereto.

[0112] FIGS. 7 and 8 are flowcharts schematically illustrating a power supply method according to an embodiment of the present disclosure. S810, S850, and S860 illustrated in FIG. 8 may correspond to S710, S730, and S740 illustrated in FIG. 7.

[0113] Referring to FIG. 7, the electronic device (100) rectifies AC power (S710). Specifically, when AC power is input from an external power source connected to the electronic device (100), the electronic device (100) rectifies the AC voltage applied based on the input AC power (S710).

[0114] And, the electronic device (100) selectively outputs the rectified AC power by using the PFC converter unit (112) that matches the voltage and current of the rectified AC power in phase (S720). At this time, based on the control signal output by the PFC converter unit (112), the electronic device (100) can repeatedly turn ON / OFF at least one switch (12) included in the PFC converter unit (112). At this time, as at least one switch (12) is repeatedly turned ON / OFF, the PFC converter unit (112) can match the phase of the input current with the phase of the input voltage.

[0115] Meanwhile, the PFC converter unit (112) can convert the voltage of the AC power source and output a DC voltage.

[0116] And, the electronic device (100) can convert the output voltage of the PFC converter unit (112) into a voltage of a first size set in advance and output it (S730). Specifically, the electronic device (100) can perform a switching operation on a plurality of switches included in the inverter unit (113) to convert the output voltage output through the PFC converter unit (112) into a voltage of a first size set in advance based on the rated voltage of the electronic device (100) and output it.

[0117] And, the electronic device (100) can provide a control signal to the motor driver for controlling the motor based on the preset first size of power (S740).

[0118] Meanwhile, referring to FIG. 8, according to one embodiment of the present disclosure, an electronic device (100) can selectively output rectified AC power and check the harmonic components of the input current rectified in a rectifier circuit. At this time, the electronic device (100) can check the harmonic components of the input current and obtain compensation information of the input current to remove the harmonic components.

[0119] And, the electronic device (100) can generate a control signal based on the identified harmonic component. Specifically, the electronic device (100) can generate a control signal for at least one switch (12) by reflecting compensation information of the input current for removing the harmonic component and compensation information of the input current for making the input current have the same phase as the input voltage. At this time, the control signal can be a PWM signal.

[0120] In addition, the electronic device (100) can provide a control signal generated to a switch that selectively outputs the rectified AC power. Accordingly, the phases of the input current and input voltage of the PFC converter can be in phase.

[0121] Meanwhile, the methods according to various embodiments of the present disclosure described above may be implemented in the form of applications that can be installed on existing electronic devices. Alternatively, the methods according to various embodiments of the present disclosure described above may be performed using a deep learning-based trained neural network (or a deep learned neural network), i.e., a learning network model. In addition, the methods according to various embodiments of the present disclosure described above may be implemented only with a software upgrade or a hardware upgrade for an existing electronic device. In addition, the various embodiments of the present disclosure described above may also be performed through an embedded server provided in an electronic device, or an external server of the electronic device.

[0122] Meanwhile, according to a temporary example of the present disclosure, the various embodiments described above can be implemented as software including instructions stored in a machine-readable storage medium that can be read by a machine (e.g., a computer). The device is a device that can call instructions stored from the storage medium and operate according to the called instructions, and may include an electronic device according to the disclosed embodiments. When an instruction is executed by a processor, the processor can perform a function corresponding to the instruction directly or under the control of the processor by using other components. The instruction may include code generated or executed by a compiler or interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' means that the storage medium does not contain a signal and is tangible, but does not distinguish between data being stored semi-permanently or temporarily in the storage medium.

[0123] Furthermore, according to one embodiment, the method according to the various embodiments described above may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or online through an application store (e.g., Play Store™). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0124] In addition, each of the components (e.g., modules or programs) according to the various embodiments described above may be composed of a single or multiple entities, and some of the corresponding sub-components described above may be omitted, or other sub-components may be further included in various embodiments. Alternatively or additionally, some components (e.g., modules or programs) may be integrated into a single entity, which may perform the same or similar functions as those performed by each of the corresponding components prior to integration. Operations performed by modules, programs or other components according to various embodiments may be executed sequentially, in parallel, iteratively or heuristically, or at least some operations may be executed in a different order, omitted, or other operations may be added.

[0125] Although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and various modifications may be made by a person having ordinary skill in the art to which the present disclosure pertains without departing from the gist of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical idea or prospect of the present disclosure.

Claims

1. In electronic devices, motor; A power supply device that receives AC power and generates DC power; A motor driver that receives the above DC power and generates and provides driving power to the motor; and A processor for providing a control signal for controlling the motor to the motor driver; The above power supply unit, A rectifier circuit for rectifying the above AC power supply; A PFC converter section that matches the voltage and current of the above-mentioned rectified AC power supply in phase; and It includes an inverter section that converts the output power of the above PFC converter section into a power of a preset first size and outputs it; The above PFC converter section, An electronic device that checks the harmonic components of the current rectified in the above rectifier circuit and matches the voltage and current of the rectified AC power source in phase based on the checked harmonic components.

2. In paragraph 1, The above PFC converter section, At least one switch connected in parallel with the above rectifier circuit; A first detection unit for detecting the magnitude and phase of the voltage rectified in the above rectifier circuit; A second detection unit for checking the harmonic components of the current rectified in the above rectifier circuit; and An electronic device, comprising: a controller for generating a control signal for controlling the at least one switch based on the magnitude of the detected voltage, the phase of the detected voltage, and the identified harmonic component.

3. In paragraph 2, The above second detection unit, An electronic device that checks harmonic components higher than a preset frequency among the current rectified in the above rectifier circuit and information on the size of the harmonic components.

4. In paragraph 3, The above second detection unit, A high-pass filter section for filtering a band below the preset frequency; An electronic device including a calculation unit that calculates an average value using output information of the high-pass filter unit.

5. In paragraph 4, An electronic device having a preset frequency of 1Khz or higher.

6. In paragraph 2, The above controller, An electronic device that generates a control signal so that the current rectified in the above rectifier circuit has the same phase as the phase of the above-determined voltage and the above-determined harmonic components are canceled out.

7. In paragraph 6, The above controller, An electronic device that generates a control signal to cancel out the identified harmonic components based on any one of the P control method, the PI control method, and the PID control method.

8. In paragraph 5, An electronic device wherein the above control signal is a PWM signal.

9. In paragraph 2, The above PFC converter section, An electronic device further comprising an inductor, one end of which is connected to an output terminal of the rectifier circuit and the other end of which is connected to the at least one switch.

10. In the power supply, A rectifier circuit that rectifies alternating current; A PFC converter section that matches the voltage and current of the above-mentioned rectified AC power supply in phase; and It includes an inverter section that converts the output power of the above PFC converter section into a power of a preset first size and outputs it; The above PFC converter section, A power supply device that checks the harmonic components of the current rectified in the above rectifier circuit and matches the voltage and current of the rectified AC power in phase based on the checked harmonic components.

11. In paragraph 10, The above PFC converter section, At least one switch connected in parallel with the above rectifier circuit; A first detection unit for detecting the magnitude and phase of the voltage rectified in the above rectifier circuit; A second detection unit for checking the harmonic components of the current rectified in the above rectifier circuit; and A power supply device comprising a controller for generating a control signal for controlling the at least one switch based on the magnitude of the detected voltage, the phase of the detected voltage, and the identified harmonic component.

12. In paragraph 11, The above second detection unit, A power supply device that checks harmonic components higher than a preset frequency among the current rectified in the above rectifier circuit and information on the size of the harmonic components.

13. In paragraph 12, The above second detection unit, A high-pass filter section for filtering a band below the preset frequency; A power supply device including a calculation unit that calculates an average value using output information of the high-pass filter unit.

14. A method for controlling an electronic device, A step of rectifying AC power through a rectifier circuit of the above electronic device; A step of selectively outputting the rectified AC power using a PFC converter unit that matches the voltage and current of the rectified AC power in phase; A step of converting and outputting the output voltage of the above PFC converter unit into a power of a preset first size; and Comprising a step of providing a first control signal to a motor driver of the electronic device for controlling a motor of the electronic device based on the first size of power set above, The optional output step above is: A step of checking the harmonic components of the above rectified current; A step of generating a second control signal for matching the voltage and current of the rectified AC power source in phase based on the harmonic components identified above; and A control method comprising the step of providing the generated second control signal to a switch that selectively outputs the rectified AC power.

15. In paragraph 14, The above verification steps are: Including a step of checking harmonic components higher than a preset frequency among the current rectified in the above rectifier circuit and information on the size of the harmonic components, The step of generating the second control signal is: A control method comprising the step of calculating an average value corresponding to the harmonic component based on the size information of the harmonic component confirmed above, and generating a control signal for matching the voltage and current of the rectified AC power source in phase based on the calculated average value.

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