KR102074779B1 - Power converting apparatus and home appliance including the same - Google Patents

Abstract

The present invention relates to a power converter and a home appliance having the same. The power converter according to the embodiment of the present invention includes an inverter including a plurality of phase arm switching elements and a plurality of lower arm switching elements, and a plurality of phase arm gates respectively outputting gate driving signals to gate terminals of the plurality of phase arm switching elements. And a plurality of phase arm on resistance elements disposed between the plurality of phase arm switching elements and the plurality of phase arm gate drivers, and a plurality of phase arm off resistance elements respectively connected to both ends of the plurality of phase arm on resistance elements. The resistance values of the phase arm on resistance elements are different from each other, and the resistance values of the plurality of lower arm off resistance elements are different from each other. Accordingly, it is possible to reduce the electromagnetic noise generated when the inverter is turned on or turned off without changing the switching frequency.

Description

Power converting apparatus and home appliance having the same {Power converting apparatus and home appliance including the same}

The present invention relates to a power converter and a home appliance having the same. More particularly, the present invention relates to a power converter capable of reducing electromagnetic interference (EMI) noise generated when an inverter is turned on or off without changing a switching frequency. An inverter and a home appliance having the same.

The power converter is a device that converts and outputs the supplied electric power.

As an example of the power converter, an inverter for converting DC power into AC power may be exemplified.

On the other hand, electromagnetic noise (EMI) noise is generated when the inverter is turned on or turned off, specifically, when the switching element is turned on or turned off.

Various studies have been attempted to reduce such electromagnetic noise.

On the other hand, Korean Patent Publication No. 2003-0026211 is provided with a circuit for the frequency modulation phase delay in accordance with the switching frequency change, in order to reduce the electromagnetic noise. However, such a circuit may cause problems such as increased complexity and increased manufacturing cost.

An object of the present invention relates to a power converter capable of reducing electromagnetic noise generated when the inverter is turned on or off without changing the switching frequency, and a home appliance having the same.

According to an embodiment of the present invention, a power converter and a home appliance having the same include an inverter including a plurality of upper arm switching elements and a plurality of lower arm switching elements, and a gate terminal of the plurality of upper arm switching elements. A plurality of phase cancer gate drivers each outputting a gate driving signal, a plurality of phase cancer on-resistance elements disposed between the plurality of phase cancer switching elements, and a plurality of phase cancer gate drivers, and a plurality of phase cancer on-resistance elements, respectively. A plurality of phase arm off resistance elements are provided, the resistance values of the plurality of phase arm on resistance elements are different from each other, and the resistance values of the plurality of arm arm off resistance elements are different from each other.

On the other hand, the rising time of the switching waveform of the first switching element among the plurality of phase cancer switching elements is the first period, and the polling time of the switching waveform of the first switching element among the plurality of phase cancer switching elements is the second longer than the first period. The rising time of the switching waveform of the second switching element among the plurality of phase arm switching elements is the third period longer than the first period, and the polling time of the switching waveform of the second switching element among the plurality of phase arm switching elements is A fourth period longer than three periods and shorter than the second period.

Meanwhile, the rising time of the switching waveform of the third switching element among the plurality of phase cancer switching elements is a fifth period longer than the third period, and the polling time of the switching waveform of the third switching element among the plurality of phase cancer switching elements is the fourth period. It is a sixth period shorter than the period.

On the other hand, as the resistance values of the plurality of phase cancer on-resistance elements increase, and as the rising time of the switching waveform increases, the resistance values of the plurality of phase cancer off-resistance elements corresponding to the plurality of phase cancer on-resistance elements decrease, and the polling time of the switching waveforms decreases. This decreases.

According to an embodiment of the present invention, a power converter and a home appliance having the same include: an inverter including a plurality of upper arm switching elements and a plurality of lower arm switching elements, and a gate driving to a gate terminal of the plurality of upper arm switching elements, respectively A plurality of phase cancer gate drivers for outputting a signal, a plurality of phase cancer resistance elements disposed between the plurality of phase cancer switching elements and the plurality of phase cancer gate drivers, and the resistance values of the plurality of phase cancer resistance elements are different from each other. Accordingly, it is possible to reduce the electromagnetic noise generated when the inverter is turned on or turned off without changing the switching frequency.

On the other hand, the rising time of the switching waveform of the first switching element among the plurality of phase cancer switching elements is the first period, and the polling time of the switching waveform of the first switching element among the plurality of phase cancer switching elements is the second longer than the first period. The rising time of the switching waveform of the second switching element among the plurality of phase arm switching elements is the third period longer than the first period, and the polling time of the switching waveform of the second switching element among the plurality of phase arm switching elements is A fourth period longer than three periods and shorter than the second period. Accordingly, it is possible to reduce the electromagnetic noise generated when the inverter is turned on or turned off without changing the switching frequency.

In particular, when the turning time of the plurality of phase arm switching elements is set differently from each other by the plurality of phase arm on-resistance elements, electromagnetic noise generated in the switching waveform is reduced.

On the other hand, further comprising a plurality of phase arm off resistance elements respectively connected to both ends of the plurality of phase arm on resistance elements, when the resistance values of the plurality of phase arm off resistance elements are different, when the plurality of phase arm switching elements are turned off, By setting the falling time of the switching waveform differently by the plurality of phase-arm off resistance elements, the electromagnetic noise generated in the switching waveform is reduced.

Meanwhile, the rising time of the switching waveform of the third switching element among the plurality of phase cancer switching elements is a fifth period longer than the third period, and the polling time of the switching waveform of the third switching element among the plurality of phase cancer switching elements is the fourth period. It is a sixth period shorter than the period. Accordingly, it is possible to reduce the electromagnetic noise generated when the inverter is turned on or turned off without changing the switching frequency.

On the other hand, as the resistance values of the plurality of phase cancer on-resistance elements increase, and as the rising time of the switching waveform increases, the resistance values of the plurality of phase cancer off-resistance elements corresponding to the plurality of phase cancer on-resistance elements decrease, and the polling time of the switching waveforms decreases. This decreases. Accordingly, it is possible to reduce the electromagnetic noise generated when the inverter is turned on or turned off without changing the switching frequency.

On the other hand, further comprising a plurality of lower arm on resistance element disposed between the plurality of lower arm switching element and the lower arm gate driver, when the resistance value of the plurality of lower arm on resistance element is different, when the plurality of lower arm switching element is turned on, By setting the rising time of the switching waveform differently by the plurality of haam-on resistance elements, electromagnetic noise generated in the switching waveform is reduced.

On the other hand, further comprising a plurality of lower arm off resistance elements respectively connected to both ends of the plurality of lower arm on resistance element, when the resistance value of the plurality of lower arm off resistance element is different, when the plurality of lower arm switching element is turned off, By setting the falling time of the switching waveform differently by the plural lower arm off resistance elements, electromagnetic noise generated in the switching waveform is reduced.

1 illustrates an example of an internal block diagram of a power conversion apparatus according to an embodiment of the present invention.
FIG. 2 is an example of an internal circuit diagram of the power converter of FIG. 1.
FIG. 3 is an internal block diagram of the inverter controller of FIG. 2.
4A to 4C are views referred to for describing the operation of the conventional power converter.
5 is a view showing a power conversion apparatus according to an embodiment of the present invention.
FIG. 6 is a diagram referred to for describing a method of operating the power converter of FIG. 5.
7 is a diagram showing a power conversion apparatus according to another embodiment of the present invention.
FIG. 8 is a diagram referred to for describing a method of operating the power converter of FIG. 7.
9 is a view showing a power conversion apparatus according to another embodiment of the present invention.
FIG. 10 is a view referred to for describing a method of operating the power converter of FIG. 9.
11A to 11B illustrate a power conversion apparatus according to various embodiments of the present disclosure.
FIG. 12 is a view referred to for describing a method of operating the power converter of FIG. 11A or 11B.
13 is a perspective view illustrating a laundry treatment device as an example of a home appliance according to an exemplary embodiment of the present invention.
14 is an internal block diagram of the laundry treatment machine of FIG.
15 is a diagram illustrating a configuration of an air conditioner which is another example of a home appliance according to an embodiment of the present invention.
16 is a schematic diagram of the outdoor unit and the indoor unit of FIG. 15.
17 is a perspective view illustrating a refrigerator that is another example of a home appliance according to an exemplary embodiment of the present invention.
FIG. 18 is a view schematically illustrating the configuration of the refrigerator of FIG. 17.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

The suffixes "module" and "unit" for components used in the following description are merely given in consideration of ease of preparation of the present specification, and do not impart any particular meaning or role by themselves. Therefore, the "module" and "unit" may be used interchangeably.

On the other hand, the power converter 220 according to an embodiment of the present invention, a device for converting power, may include an inverter for driving a motor. Accordingly, the power converter 220 may be referred to as a motor driving device.

FIG. 1 illustrates an example of an internal block diagram of a power converter according to an embodiment of the present invention, and FIG. 2 is an example of an internal circuit diagram of the power converter of FIG.

Referring to the drawings, the power converter 220 according to an embodiment of the present invention, the converter 410, a dc terminal capacitor (C), an inverter 420, and an inverter controller 430 Can be.

On the other hand, the power converter 220 according to an embodiment of the present invention may further include a dc terminal voltage detector (B), the output current detector (E). In addition, the power converter 220 may further include an input current detector A, a reactor L, and the like.

On the other hand, the power converter 220 according to an embodiment of the present invention, may be used a small capacity dc terminal capacitor (C), which is called a capacitorless (capacitorless). In this case, the voltage across the dc terminal capacitor C may pulsate.

The inverter 420 may include a plurality of phase arm switching elements and a plurality of lower arm switching elements.

On the other hand, when the plurality of phase arm switching elements in the inverter 420 are turned on at the same time, or when the plurality of lower arm switching elements are turned on at the same time, each of the plurality of switching elements has the same rising time. The waveform will be generated. This causes electromagnetic noise (EMI) noise due to the same rising time.

In the present invention, a solution for solving this point is proposed.

The power converter 220 according to the embodiment of the present invention, the inverter having a plurality of phase arm switching elements (Sa, Sb, Sc) and a plurality of lower arm switching elements (S'a, S'b, S'c) 420, a plurality of phase cancer gate drivers GDa, GDb, and GDc outputting gate driving signals to gate terminals of the plurality of phase cancer switching elements Sa, Sb, and Sc, respectively, and a plurality of phase cancer switching elements Sa. And a plurality of phase cancer resistors Raon, Rbon, and Rcon disposed between Sb and Sc and the plurality of phase cancer gate drivers GDa, GDb, and GDc, and the plurality of phase cancer resistors Raon, Bon, The resistance value of Rcon) is different. Accordingly, electromagnetic wave noise generated when the inverter 420 is turned on or turned off can be reduced without changing the switching frequency.

Particularly, when the plurality of phase arm switching elements Sa, Sb, and Sc are turned on, the rising time of the switching waveform by the plurality of phase arm on resistance elements Raon, Rbon, and Rcon is set differently. Electromagnetic noise generated in the switching waveform is reduced.

On the other hand, it further comprises a plurality of phase arm off resistance elements (Raoff, Rboff, Rcoff) connected to both ends of the plurality of phase arm on resistance elements (Raon, Rbon, Rcon), respectively, a plurality of phase arm off resistance elements (Raoff, Rboff, When the resistance values of Rcoff are different from each other, when the plurality of phase arm switching elements Sa, Sb, and Sc are turned off, the polling time of the switching waveform due to the plurality of phase arm off resistance elements Raoff, Rboff, and Rcoff, By setting the falling time differently, electromagnetic noise generated in the switching waveform is reduced.

Meanwhile, the plurality of lower arm on resistance elements Ra'on, Rb'on, and Rc'on disposed between the plurality of lower arm switching elements S'a, S'b, and S'c and the lower arm gate driver GDx. And a plurality of lower arm switching resistors S'a, S'b, and S'c when resistance values of the plurality of lower arm on resistance elements Ra'on, Rb'on, and Rc'on are different from each other. ), When the rising time of the switching waveform is set differently by the plurality of Haarm-on resistance elements Ra'on, Rb'on, and Rc'on, the electromagnetic noise generated in the switching waveform Will be reduced.

On the other hand, it further includes a plurality of lower arm off resistance elements (Ra'off, Rb'off, Rc'off) connected to both ends of the plurality of arm arm on resistance elements (Ra'on, Rb'on, Rc'on), respectively. When the resistance values of the plurality of arm arm off resistance elements Ra'off, Rb'off, and Rc'off are different from each other, the plurality of lower arm switching element S'a, S'b, and S'c are turned off. At the time, the falling time of the switching waveform is set differently by the plurality of lower arm off resistance elements Ra'off, Rb'off, and Rc'off, thereby reducing the electromagnetic noise generated in the switching waveform. .

Meanwhile, according to another embodiment of the present invention, the power converter 220 includes a plurality of phase arm switching elements Sa, Sb, and Sc and a plurality of lower arm switching elements S'a, S'b, and S'c. A plurality of phase arm gate drivers GDa, GDb, and GDc each of which outputs a gate driving signal to the gate terminals of the plurality of phase arm switching elements Sa, Sb, and Sc; A plurality of phase arm on resistance elements Raon, Rbon, Rcon disposed between the switching elements Sa, Sb, Sc and the plurality of phase arm gate drivers GDa, GDb, GDc, and a plurality of phase arm on resistance elements Raon, A phase arm on resistance element having a plurality of phase arm off resistance elements Raoff, Rboff, and Rcoff connected to both ends of Rbon and Rcon, respectively, and corresponding to at least one of the plurality of phase arm switching elements Sa, Sb, and Sc. The resistance values of Raon, Rbon, and Rcon are different from those of the phase arm off resistance elements Raoff, Rboff, and Rcoff. Accordingly, electromagnetic wave noise generated when the inverter 420 is turned on or turned off can be reduced without changing the switching frequency.

Hereinafter, the operation of each component unit in the power converter 220 of FIGS. 1 and 2 will be described.

The reactor L is disposed between the commercial AC power supplies 405 and v _s and the converter 410 to perform power factor correction or boost operation. In addition, the reactor L may perform a function of limiting harmonic currents due to the high speed switching of the converter 410.

The input current detector A can detect the input current i _s input from the commercial AC power supply 405. To this end, a CT (current trnasformer), a shunt resistor, or the like may be used as the input current detector A. FIG. The detected input current i _s may be input to the inverter controller 430 as a discrete signal in the form of a pulse.

The converter 410 converts the commercial AC power supply 405 which passed through the reactor L into DC power, and outputs it. Although the commercial AC power supply 405 is shown as a single phase AC power supply in the figure, it may be a three phase AC power supply. The internal structure of the converter 410 also varies according to the type of the commercial AC power source 405.

Meanwhile, the converter 410 may be formed of a diode without a switching element, and may perform a rectification operation without a separate switching operation.

For example, in the case of a single-phase AC power supply, four diodes may be used in the form of a bridge, and in the case of a three-phase AC power supply, six diodes may be used in the form of a bridge.

On the other hand, the converter 410, for example, a half-bridge type converter in which two switching elements and four diodes are connected may be used, and in the case of a three-phase AC power supply, six switching elements and six diodes may be used. . In this case, the converter 410 may be referred to as a rectifier.

When the converter 410 includes a switching element, the boosting operation, power factor improvement, and DC power conversion may be performed by the switching operation of the switching element.

The dc terminal capacitor C smoothes the input power and stores it. In the figure, one device is exemplified by the dc terminal capacitor C, but a plurality of devices may be provided to ensure device stability.

On the other hand, in the drawing, but is illustrated as being connected to the output terminal of the converter 410, not limited to this, a direct current power may be input directly, for example, the direct current power from the solar cell is a dc terminal capacitor (C) It may be input directly to the DC or DC / DC conversion. Hereinafter, the parts illustrated in the drawings will be mainly described.

On the other hand, since the DC power is stored at both ends of the dc terminal capacitor C, this may be referred to as a dc terminal or a dc link terminal.

The dc end voltage detector B may detect a dc end voltage Vdc that is both ends of the dc end capacitor C. To this end, the dc terminal voltage detector B may include a resistor, an amplifier, and the like. The detected dc terminal voltage Vdc may be input to the inverter controller 430 as a discrete signal in the form of a pulse.

The inverter 420 includes a plurality of inverter switching elements, converts the smoothed DC power supply Vdc into three-phase AC power supplies va, vb, vc of a predetermined frequency by the on / off operation of the switching device, It may output to the synchronous motor 230.

Inverter 420 is a pair of upper arm switching elements Sa, Sb, Sc and lower arm switching elements S'a, S'b, S'c, which are connected in series with each other, and a total of three pairs of upper and lower arms The switching elements are connected in parallel with each other (Sa & S'a, Sb & S'b, Sc & S'c). Diodes are connected in anti-parallel to each of the switching elements Sa, S'a, Sb, S'b, Sc and S'c.

The switching elements in the inverter 420 perform on / off operations of the respective switching elements based on the inverter switching control signal Sic from the inverter controller 430. As a result, the three-phase AC power having a variable frequency is output to the three-phase synchronous motor 230.

The inverter controller 430 may control a switching operation of the inverter 420 based on a sensorless method. To this end, the inverter controller 430 may receive an output current io detected by the output current detector E. FIG.

The inverter controller 430 outputs an inverter switching control signal Sic to the inverter 420 in order to control the switching operation of the inverter 420. The inverter switching control signal Sic is a switching control signal of the pulse width modulation method PWM, and is generated and output based on the output current io detected by the output current detector E. FIG. A detailed operation of the output of the inverter switching control signal Sic in the inverter controller 430 will be described later with reference to FIG. 3.

The output current detector E may detect a phase current flowing between the three-phase motor 230, that is, the output current io.

The output current detector E may be disposed in the inverter 420 and the motor 230 to detect a current flowing in the motor 230 as shown in the drawing.

The output current detection unit E may be provided with three resistance elements as shown in the figure. Through the three resistance elements, it is possible to detect a phase current (ia, ib, ic) which is an output current io flowing through the motor 230. The detected output currents ia, ib and ic may be applied to the inverter controller 430 as discrete signals in the form of pulses and are based on the detected output currents ia, ib and ic. The switching control signal Sic is generated.

In the present specification, ia, ib, ic or io is used in combination as an output current.

On the other hand, unlike the drawing, the output current detector E may include two resistance elements. The phase current of the other phase can be calculated using three-phase equilibrium.

On the other hand, unlike the figure, the output current detecting unit E is disposed between the dc terminal capacitor C and the inverter 420, and has one shunt resistor element Rs to provide current flowing through the motor 230. It can also be detected. This method may be called a shunt method.

According to the one shunt method, the output current detection unit E uses one shunt resistor element Rs to output the output current flowing through the motor 230 at a time division when the lower arm switching element of the inverter 420 is turned on. It is possible to detect a phase current (idc).

The detected output current io may be applied to the inverter controller 430 as a discrete signal in the form of a pulse, and the inverter switching control signal Sic is generated based on the detected output current io. Can be.

On the other hand, the three-phase motor 230 is provided with a stator and a rotor, each phase AC power of a predetermined frequency is applied to the coil of the stator of each phase (a, b, c phase), so that the rotor rotates Will be

Such a motor 230 is, for example, a Surface-Mounted Permanent-Magnet Synchronous Motor (SMPMSM), an Interidcr Permanent Magnet Synchronous Motor (IPMSM), and a synchronous clock. Synchronous Reluctance Motor (Synrm) and the like. Of these, SMPMSM and IPMSM are permanent magnet synchronous motors (PMSMs) with permanent magnets, while synrms have no permanent magnets.

FIG. 3 is an internal block diagram of the inverter controller of FIG. 2.

Referring to FIG. 3, the inverter controller 430 may include an axis converter 510, a speed calculator 520, a current command generator 530, a voltage command generator 540, an axis converter 550, and The switching control signal output unit 560 may be included.

The axis converter 510 may convert the output currents ia, ib and ic detected by the output current detector E into two-phase currents i α and i β of the stationary coordinate system.

On the other hand, the axis conversion unit 510 can convert the two-phase current (iα, iβ) of the stationary coordinate system into a two-phase current (id, iq) of the rotary coordinate system.

)를 추정하고, 추정된 위치를 미분하여, 속도(

)를 연산할 수 있다. The speed calculating unit 520 is based on the output current (ia, ib, ic) detected by the output current detecting unit E, and the position value (

), The derivative of the estimated position,

) Can be calculated.

)와 속도 지령치(ω^* _r)에 기초하여, 전류 지령치(i^* _q)를 생성한다. 예를 들어, 전류 지령 생성부(530)는, 연산 속도(

)와 속도 지령치(ω^* _r)의 차이에 기초하여, PI 제어기(335)에서 PI 제어를 수행하며, 전류 지령치(i^* _q)를 생성할 수 있다. 도면에서는, 전류 지령치로, q축 전류 지령치(i^* _q)를 예시하나, 도면과 달리, d축 전류 지령치(i^* _d)를 함께 생성하는 것도 가능하다. 한편, d축 전류 지령치(i^* _d)의 값은 0으로 설정될 수도 있다. On the other hand, the current command generation unit 530 has a calculation speed (

) And the current command value i ^* _q based on the speed command value ω ^* _r . For example, the current command generation unit 530 has a calculation speed (

PI control may be performed in the PI controller 335 based on the difference between the speed command value ω ^* _r and the current command value i ^* _q . In the drawing, although the q-axis current command value i ^* _q is illustrated as a current command value, it is also possible to generate | generate a d-axis current command value i ^* _d unlike a figure. On the other hand, the value of the d-axis current command value i ^* _d may be set to zero.

On the other hand, the current command generation unit 530 may further include a limiter (not shown) for limiting the level so that the current command value i ^* _q does not exceed the allowable range.

Next, the voltage command generation unit 540 includes the d-axis and q-axis currents i _d and i _q which are axis-converted in the two-phase rotational coordinate system by the axis conversion unit, and the current command value in the current command generation unit 530 or the like. Based on i ^* _d , i ^* _q ), the d-axis and q-axis voltage command values v ^* _d and v ^* _q are generated. For example, the voltage command generation unit 540 performs PI control in the PI controller 344 based on the difference between the q-axis current i _q and the q-axis current command value i ^* _q , and q The axial voltage setpoint v ^* _q can be generated. In addition, the voltage command generation unit 540 performs the PI control in the PI controller 348 based on the difference between the d-axis current i _d and the d-axis current command value i ^* _d , and the d-axis voltage. The setpoint (v ^* _d ) can be generated. On the other hand, the voltage command generation unit 540 may further include a limiter (not shown) for restricting the level so that the d-axis and q-axis voltage command values (v ^* _d , v ^* _q ) do not exceed the allowable range. .

On the other hand, the generated d-axis and q-axis voltage command values v ^* _d and v ^* _q are input to the axis conversion unit 550.

)와, d축, q축 전압 지령치(v^* _d,v^* _q)를 입력받아, 축변환을 수행한다.The axis transform unit 550 may calculate a position calculated by the speed calculator 520 (

), And the d-axis and q-axis voltage command values (v ^* _d , v ^* _q ) are input, and axis conversion is performed.

)가 사용될 수 있다.First, the axis transformation unit 550 converts the two-phase rotation coordinate system from the two-phase rotation coordinate system. At this time, the position calculated by the speed calculator 520 (

) Can be used.

The axis transform unit 550 converts the two-phase stationary coordinate system into a three-phase stationary coordinate system. Through this conversion, the axis conversion unit 1050 outputs the three-phase output voltage command values v ^* a, v ^* b, v ^* c.

The switching control signal output unit 560 generates an inverter switching control signal Sic according to the pulse width modulation (PWM) method based on the three-phase output voltage command values (v ^* a, v ^* b, v ^* c). To print.

The output inverter switching control signal Sic may be converted into a gate driving signal by a gate driver (not shown) and input to a gate of each switching element in the inverter 420. As a result, each of the switching elements Sa, S'a, Sb, S'b, Sc, and S'c in the inverter 420 performs a switching operation.

4A to 4C are views referred to for describing the operation of the conventional power converter.

First, FIG. 4A shows a conventional power converter 220x.

Resistor between the inverter 420x including the plurality of phase arm switching elements Sa to Sc and the lower arm switching elements S'a to S'c, and the plurality of gate drivers GDax, GDcx, GDcx, and GDxx, respectively. The element Rx may be disposed. In this case, the resistance value of each resistor element Rx may be the same.

When the resistance values of the respective resistance elements Rx are the same, the plurality of switching elements Sa to Sc, S'a to S 'are generated by the gate driving signals output from the plurality of gate drivers GDax, GDcx, GDcx, and GDxx. At the turn-on of c), as shown in FIG. 4B, during the Pxaa period, the rising times of the switching waveforms are all the same.

Therefore, as shown in (b) of FIG. 4B, during the Pxaa period, the level of power Pxa consumed is rapidly increased in the plurality of switching elements, and as in FIG. 4B, during the Pxaa period, electromagnetic noise The level of (Noa) increases rapidly. That is, during the Pxaa period, there may be a problem that a sudden electromagnetic noise occurs.

On the other hand, when the resistance values of the respective resistance elements Rx are the same, the plurality of switching elements Sa to Sc and S'a to the gate driving signals output from the plurality of gate drivers GDax, GDcx, GDcx, and GDxx. At the turn-off of S'c), as shown in FIG. 4B, during the Pxab period, the fall times of the switching waveforms are all the same.

Therefore, as shown in (b) of FIG. 4B, during the Pxab period, the level of power Pxa consumed is rapidly increased in the plurality of switching elements, and as in the Pxab period, as shown in FIG. The level of (Noa) increases rapidly. That is, during the Pxaa period, there may be a problem that a sudden electromagnetic noise occurs.

On the other hand, similar to FIG. 4B, FIG. 4C shows a plurality of switchings during turn-on or turn-off of the plurality of switching elements Sa to Sc and S'a to S'c, that is, during the Pxba period or the Pxbb period. In the device, there is a problem in that the level of power Pxb consumed increases rapidly, and the level of electromagnetic noise Nob increases rapidly.

On the other hand, the switching speed of the plurality of switching elements Sa to Sc, S'a to S'c of FIG. 4B is faster than that of FIG. 4C. In this case, however, the switching loss, that is, the power consumption is small, There is a disadvantage in that the level is greater.

On the other hand, the switching speed of the plurality of switching elements Sa to Sc, S'a to S'c of FIG. 4C is slower than that of FIG. 4C. In this case, however, the level of electromagnetic noise is smaller, The disadvantage is that the power consumption is larger.

Accordingly, in the present invention, the resistance value of the resistance element disposed between the plurality of switching elements Sa to Sc, S'a to S'c and the gate driver is changed so that the rising time, the falling time, and the like of the switching waveform are changed. Suggest ways to make at least some changes. This will be described with reference to FIG. 5 and below.

FIG. 5 is a diagram illustrating a power converter according to an exemplary embodiment of the present invention, and FIG. 6 is a view referred to for describing a method of operating the power converter of FIG. 5.

Referring to the drawings, the power converter 220a of FIG. 5 includes a plurality of phase arm switching elements Sa, Sb, and Sc and a plurality of lower arm switching elements S'a, S'b, and S'c. A plurality of phase arm gate drivers GDa, GDb, and GDc outputting gate driving signals to the gate terminals of the inverter 420, the plurality of phase arm switching elements Sa, Sb, and Sc, respectively, and a plurality of phase arm switching elements ( And a plurality of phase cancer resistors Raon, Rbon, and Rcon disposed between Sa, Sb, Sc, and the plurality of phase cancer gate drivers GDa, GDb, and GDc. , Rcon) has different resistance values.

On the other hand, the plurality of phase arm off resistance elements Raoff, Rboff, Rcoff are connected to both ends of the plurality of phase arm on resistance elements Raon, Rbon, and Rcon, respectively, and the plurality of phase arm off resistance elements Raoff, Rboff, and Rcoff. The resistance values of may be the same as each other.

Specifically, a plurality of phase cancer on-resistance elements (Raon, Rbon, Rcon) and a plurality of phase cancer on between the plurality of phase cancer switching elements Sa, Sb, Sc, and the plurality of phase cancer gate drivers GDa, GDb, and GDc. Diode elements Daon, Dbon, and Dcon are disposed.

A plurality of phase arm off resistance elements Raoff, Rboff, and Rcoff and a plurality of phase arms are provided at both ends of the plurality of phase cancer on-resistance elements Raon, Rbon, and Rcon and the plurality of phase cancer on diode elements Daon, Dbon, and Dcon. Off diode elements Daoff, Dboff, and Dcoff may be disposed.

The plurality of phase cancer gate drivers GDa, GDb, and GDc, that is, the first to third gate drivers GDa, GDb, and GDc, respectively, output a gate driving signal to the plurality of phase cancer switching elements Sa, Sb, and Sc. Can be.

When the plurality of phase arm switching elements Sa, Sb, and Sc are turned on, the resistance values of the plurality of phase arm on-resistance elements Raon, Rbon, and Rcon are different. As shown in FIG. 6, the rising time is T1. , T2, T3 can be different. As a result, in the switching waveform flowing through the plurality of phase-arm switching elements Sa, Sb, and Sc, the overlapping portion becomes small, so that electromagnetic noise is reduced.

On the other hand, the power converter 220a of FIG. 5 includes a lower arm gate driver GDx for outputting a gate driving signal to the gate terminals of the plurality of lower arm switching elements S'a, S'b, and S'c; Further, a plurality of lower arm on resistance elements Ra'on, Rb'on, and Rc'on disposed between the plurality of lower arm switching elements S'a, S'b, S'c and the lower arm gate driver GDx. It can be provided.

In this case, the plurality of haarm on resistance elements Ra'on, Rb'on, and Rc'on may all have the same resistance value.

On the other hand, the power converter 220a of FIG. 5 includes a plurality of lower arm off resistance elements Ra'off and Rb connected to both ends of the plurality of lower arm on resistance elements Ra'on, Rb'on, and Rc'on, respectively. 'off, Rc'off) may be further included.

Specifically, between the plurality of lower arm switching elements S'a, S'b, S'c and the lower arm gate driver GDx, the plurality of lower arm on resistance elements Ra'on, Rb'on, and Rc'on. A plurality of haarm-on diode elements Da'on, Db'on, and Dc'on are disposed.

A plurality of lower arm off resistances are provided at both ends of the plurality of lower arm on resistance elements Ra'on, Rb'on, and Rc'on and the lower arm on diode elements Da'on, Db'on, and Dc'on. The elements Ra'off, Rb'off, and Rc'off and a plurality of haarm off diode elements Da'off, Db'off, and Dc'off may be disposed.

The lower arm gate driver GDx, that is, the fourth gate driver GDx, may output the gate driving signals to the plurality of lower arm switching elements S'a, S'b, and S'c, respectively.

When the plurality of lower arm switching elements S'a, S'b, and S'c are turned on, the plurality of lower arm on resistance elements Ra'on, Rb'on, and Rc'on are the same. The rising time may be equal to T4.

On the other hand, the resistance values of the plurality of haam on resistance elements Ra'on, Rb'on, and Rc'on may be different from the resistance values of the plurality of phase cancer on resistance elements Raon, Rbon, and Rcon.

As a result, the overlapping portion of the switching waveforms flowing through the plurality of phase arm on-resistance elements Raon, Rbon, and Rcon and the plurality of lower arm switching elements S'a, S'b, and S'c decreases, thereby causing electromagnetic waves. Noise is reduced.

FIG. 7 is a diagram illustrating a power converter according to another embodiment of the present invention, and FIG. 8 is a view referred to for describing a method of operating the power converter of FIG. 7.

Referring to the drawings, the power converter 220a of FIG. 7 is similar to the power converter 220a of FIG. 5, but the resistance values of the plurality of phase-arm on resistance elements Raon, Rbon, and Rcon are different from each other. Furthermore, the characteristics of the resistances of the plurality of phase arm off resistance elements Raoff, Rboff, and Rcoff are different from each other.

Accordingly, when the plurality of phase arm switching elements Sa, Sb, and Sc are turned off, the resistance values of the plurality of phase arm off resistance elements Raoff, Rboff, and Rcoff are different. Thus, as shown in FIG. ) May be different from T1b, T2b, and T3b. As a result, in the switching waveform flowing through the plurality of phase-arm switching elements Sa, Sb, and Sc, the overlapping portion becomes small, so that electromagnetic noise is reduced.

9 is a diagram illustrating a power converter according to still another embodiment of the present invention, and FIG. 10 is a view referred to for describing an operation method of the power converter of FIG. 9.

Referring to the drawings, the power converter 220a of FIG. 9 is similar to the power converter 220a of FIG. 5, but the resistance values of the plurality of phase-on resistance elements Raon, Rbon, and Rcon are different from each other. Furthermore, the characteristics of the resistance values of the plurality of haam-on resistance elements Ra'on, Rb'on, and Rc'on are different from each other.

Accordingly, when the plurality of lower arm switching elements S'a, S'b, and S'c are turned on, the resistance values of the plurality of lower arm on resistance elements Ra'on, Rb'on, and Rc'on are different. As shown in FIG. 10, the rising time may be different from T4, T5, and T6, respectively. As a result, in the switching waveforms flowing through the plurality of lower arm switching elements S'a, S'b, and S'c, the overlapping portion becomes small, so that electromagnetic noise is reduced.

In addition, the resistance values of the plurality of phase cancer on-resistance elements Raon, Rbon, and Rcon and the plurality of phase cancer on-resistance elements Ra'on, Rb'on, and Rc'on are all different. When (Sa, Sb, Sc) and the plurality of lower arm switching elements S'a, S'b, S'c are turned on, as shown in FIG. 10, the rising time is T1, T2, T3, T4. , T5, T6 can be different. As a result, electromagnetic noise is reduced when the plurality of switching elements are turned on.

11A to 11B are diagrams illustrating a power converter according to various embodiments of the present disclosure, and FIG. 12 is a view referred to for describing a method of operating the power converter of FIG. 11A or 11B.

Referring to the drawings, the power converter 220a of FIG. 11A is similar to the power converter 220a of FIG. 9, but includes a plurality of phase-arm-on resistance elements Raon, Rbon, and Rcon, and a plurality of arm-on resistance elements. Ra'on, Rb'on, Rc'on), the resistance values of the plurality of phase arm off resistance elements Raoff, Rboff, Rcoff, and the plurality of arm arm off resistance elements Ra'off, Rb'off, Rc'off In other words, they are different.

Accordingly, when the plurality of phase arm switching elements Sa, Sb, and Sc and the plurality of lower arm switching elements S'a, S'b, and S'c are turned on, the rising time is as shown in FIG. 12. , T1, T2, T3, T4, T5, and T6. Accordingly, electromagnetic noise is reduced when the plurality of switching elements are turned on.

Further, when the plurality of phase arm switching elements Sa, Sb, and Sc and the plurality of arm arm switching elements S'a, S'b, and S'c are turned off, the falling time is Ta, Tb, Tc, Td, Te, Tf may be different. Accordingly, electromagnetic noise is reduced when the plurality of switching elements are turned off.

Meanwhile, similar to the power converter 220a of FIG. 11A, the power converter 220b of FIG. 11B includes a plurality of phase cancer on-resistance elements Raon, Rbon, and Rcon, and a plurality of harmonic resistance resistors Ra'on. , Rb'on, Rc'on), the resistance values of the plurality of phase arm off resistance elements Raoff, Rboff, and Rcoff, and the plurality of arm arm off resistance elements Ra'off, Rb'off, and Rc'off are different from each other. It has that feature.

Meanwhile, unlike the power converter 220a of FIG. 11A, the power converter 220b of FIG. 11B is connected to the gate terminals of the plurality of lower arm switching elements S'a, S'b, and S'c. The difference lies in that the plurality of lower arm gate drivers GDd, GDe, and GDf respectively output the gate driving signals.

Accordingly, the plurality of lower arm on resistance elements Ra'on, Rb'on, and Rc'on include the plurality of lower arm switching elements S'a, S'b, and S'c and the plurality of lower arm gate drivers GDd. , GDe, GDf).

Meanwhile, the plurality of phase arm on resistance elements (Raon, Rbon, Rcon), the plurality of arm arm on resistance elements (Ra'on, Rb'on, Rc'on) and the plurality of phase arm off resistors described in FIGS. The resistance values of the elements Raoff, Rboff, and Rcoff and the plurality of lower arm off resistance elements Ra'off, Rb'off, and Rc'off are all described under the same switching frequency. By doing so, electromagnetic noise can be reduced.

Meanwhile, the above-described power converter 220 may be applied to various electronic devices. For example, the present invention may be applied to a laundry treatment device, an air conditioner, a refrigerator, a water purifier, a cleaner, a vehicle, a robot, a drone, and the like among home appliances. Hereinafter, various examples of applicable home appliances of the power converter 220 are illustrated.

13 is a perspective view showing a laundry treatment machine according to an embodiment of the present invention.

Referring to the drawings, the laundry treatment machine 100a according to an embodiment of the present invention is a laundry machine of a front load type in which a cloth is inserted into a washing tank in a front direction. The laundry treatment apparatus of the front type is a concept including a washing machine in which a cloth is inserted to perform washing, rinsing and dehydration, or a dryer in which a wet cloth is inserted to perform drying. Hereinafter, a washing machine will be described.

The laundry treatment apparatus 100a of FIG. 13 is a laundry tub laundry treatment apparatus, and includes a cabinet 110 forming an exterior of the laundry treatment apparatus 100a and a cabinet 110 and supported by the cabinet 110. The tub 120, the tub 120 is disposed inside the tub 120 is washed with cloth, the motor 130 for driving the washing tank 122, and the cabinet 110 is disposed outside the cabinet 110 It includes a washing water supply device (not shown) for supplying the wash water therein, and a drainage device (not shown) formed under the tub 120 to discharge the wash water to the outside.

A plurality of through holes 122A are formed in the washing tub 122 to allow the washing water to pass therethrough, and when the washing tub 122 is rotated, the laundry is lifted to a certain height and then lifted on the inner side of the washing tub 112 so as to fall by gravity. 124 may be deployed.

The cabinet 110 includes a cabinet main body 111, a cabinet cover 112 disposed at the front of the cabinet main body 111 and coupled thereto, and a control disposed at the upper side of the cabinet cover 112 and coupled with the cabinet main body 111. The panel 115 and a top plate 116 disposed above the control panel 115 and coupled to the cabinet body 111 are included.

The cabinet cover 112 includes a cloth entry hole 114 formed to allow entry and exit of the gun, and a door 113 disposed to be rotatable from side to side to enable opening and closing of the gun entry hole 114.

The control panel 115 is provided with operation keys 117 for operating the operating state of the laundry processing apparatus 100a and a display device disposed on one side of the operation keys 117 and displaying an operating state of the laundry processing apparatus 100a ( 118).

The operation keys 117 and the display device 118 in the control panel 115 are electrically connected to a control unit (not shown), and the control unit (not shown) electrically controls each component of the laundry processing apparatus 100a. do. The operation of the controller (not shown) will be described later.

On the other hand, the washing tank 122 may be provided with an auto balance (not shown). Auto balance (not shown) is to reduce the vibration caused by the eccentric amount of the laundry contained in the washing tank 122, it may be implemented as a liquid balance, ball balance and the like.

On the other hand, although not shown in the figure, the laundry treatment apparatus 100a may further include a vibration sensor for measuring the vibration amount of the washing tank 122 or the vibration amount of the cabinet 110.

14 is an internal block diagram of the laundry treatment machine of FIG.

Referring to the drawings, in the laundry treatment apparatus 100a, the driving unit 220 is controlled by the control operation of the control unit 210, and the driving unit 220 drives the motor 230. Accordingly, the washing tank 122 is rotated by the motor 230.

The control unit 210 receives an operation signal from the operation key 1017 and operates. Accordingly, washing, rinsing, and dehydration strokes can be performed.

In addition, the controller 210 may control the display 18 to display a washing course, a washing time, a dehydration time, a rinsing time, or a current operation state.

On the other hand, the control unit 210 controls the drive unit 220, and the drive unit 220 controls the motor 230 to operate. At this time, inside or outside the motor 230, a position sensing unit for sensing the rotor position of the motor is not provided. That is, the driving unit 220 controls the motor 230 by a sensorless method.

The driving unit 220 is for driving the motor 230, and an output current detecting unit (E in FIG. 2) for detecting an output current flowing through the inverter (not shown), the inverter control unit (not shown), and the motor 230. And an output voltage detector (F in FIG. 2) for detecting the output voltage vo applied to the motor 230. In addition, the driving unit 220 may be a concept that further includes a converter, for supplying a DC power input to an inverter (not shown).

For example, the inverter control unit 430 of FIG. 2 in the drive unit 220 estimates the rotor position of the motor 230 based on the output current idc and the output voltage vo. Then, based on the estimated rotor position, the motor 230 is controlled to rotate.

Specifically, the inverter control unit 430 of FIG. 2 generates a switching control signal (Sic of FIG. 2) of the pulse width modulation (PWM) method based on the output current idc and the output voltage vo, thereby inverting the inverter. When output to (not shown), the inverter (not shown) performs a high-speed switching operation, and supplies AC power of a predetermined frequency to the motor 230. The motor 230 is then rotated by an AC power supply of a predetermined frequency.

Meanwhile, the driver 220 may correspond to the power converter 220 of FIG. 1.

On the other hand, the control unit 210, based on the output current (idc) flowing in the motor 230, it can detect the amount of quantity. For example, while the washing tub 122 rotates, the amount of quantity can be sensed based on the current value idc of the motor 230.

In particular, the control unit 210, when detecting the amount of capacity, by using the stator resistance and inductance value of the motor measured in the motor alignment section, it is possible to accurately detect the amount of quantity.

On the other hand, the control unit 210 may detect the unbalance (UB) of the washing tank 122, that is, the unbalance (UB) of the washing tank 122. This eccentricity detection may be performed based on the ripple component of the output current (idc) flowing in the motor 230 or the rotational speed change amount of the washing tub 122.

In particular, the control unit 210, by detecting the amount of capacity, by using the stator resistance and inductance value of the motor measured in the motor alignment section, it is possible to accurately detect the eccentric amount.

15 is a diagram illustrating a configuration of an air conditioner which is another example of a home appliance according to an embodiment of the present invention.

As shown in FIG. 15, the air conditioner 100b according to the present invention may include an indoor unit 31b and an outdoor unit 21b connected to the indoor unit 31b.

The indoor unit 31b of the air conditioner may be any of a stand type air conditioner, a wall-mounted air conditioner, and a ceiling type air conditioner, but the drawing illustrates the stand type indoor unit 31b.

Meanwhile, the air conditioner 100b may further include at least one of a ventilation device, an air cleaning device, a humidifier, and a heater, and may operate in conjunction with the operation of the indoor unit and the outdoor unit.

The outdoor unit 21b includes a compressor (not shown) for receiving and compressing a refrigerant, an outdoor heat exchanger (not shown) for exchanging refrigerant and outdoor air, and an accumulator for extracting and supplying a gas refrigerant to the compressor. And a four-way valve (not shown) for selecting a flow path of the refrigerant according to the heating operation. In addition, although a plurality of sensors, valves and oil recovery device, etc. are further included, the description of the configuration will be omitted below.

The outdoor unit 21b operates the compressor and the outdoor heat exchanger, and compresses or heat exchanges the refrigerant according to a setting to supply the refrigerant to the indoor unit 31b. The outdoor unit 21b may be driven by the demand of the remote controller (not shown) or the indoor unit 31b. In this case, as the cooling / heating capacity is changed corresponding to the indoor unit being driven, the number of operation of the outdoor unit and the number of operation of the compressor installed in the outdoor unit may be changed.

At this time, the outdoor unit 21b supplies the compressed refrigerant to the connected indoor unit 310b.

The indoor unit 31b receives a coolant from the outdoor unit 21b and discharges cold air into the room. The indoor unit 31b includes an indoor heat exchanger (not shown), an indoor fan (not shown), an expansion valve (not shown) in which the supplied refrigerant is expanded, and a plurality of sensors (not shown).

At this time, the outdoor unit 21b and the indoor unit 31b are connected by a communication line to transmit and receive data to each other, and the outdoor unit and the indoor unit are connected to a remote controller (not shown) by wire or wirelessly and operate under the control of a remote controller (not shown). can do.

The remote controller (not shown) may be connected to the indoor unit 31b to input a user's control command to the indoor unit, and receive and display state information of the indoor unit. At this time, the remote control may communicate by wire or wirelessly according to the connection form with the indoor unit.

16 is a schematic diagram of the outdoor unit and the indoor unit of FIG. 15.

Referring to the drawings, the air conditioner 100b is largely divided into an indoor unit 31b and an outdoor unit 21b.

The outdoor unit 21b includes a compressor 102b that serves to compress the refrigerant, a compressor electric motor 102bb that drives the compressor, an outdoor side heat exchanger 104b that serves to radiate the compressed refrigerant, and an outdoor unit. An outdoor blower 105b disposed on one side of the heat exchanger 104b and including an outdoor fan 105ab for promoting heat dissipation of the refrigerant and an electric motor 105bb for rotating the outdoor fan 105ab, and an expansion for expanding the condensed refrigerant The mechanism 106b, the cooling / heating switching valve 110b for changing the flow path of the compressed refrigerant, and the accumulator 103b for temporarily storing the gasified refrigerant to remove moisture and foreign matter and then supplying a refrigerant of a constant pressure to the compressor. And the like.

The indoor unit 31b is disposed in the room to perform a cooling / heating function, an indoor side heat exchanger 109b, and an indoor fan 109ab and an interior disposed at one side of the indoor side heat exchanger 109b to promote heat dissipation of the refrigerant. The indoor blower 109b etc. which consist of the electric motor 109bb which rotates the fan 109ab are included.

At least one indoor side heat exchanger (109b) may be installed. The compressor 102b may be at least one of an inverter compressor and a constant speed compressor.

In addition, the air conditioner 100b may be configured as a cooler for cooling the room, or may be configured as a heat pump for cooling or heating the room.

The compressor 102b in the outdoor unit 21b of FIG. 15 may be driven by a power converter, such as FIG. 1, which drives the compressor motor 250b.

Alternatively, the indoor fan 109ab or the outdoor fan 105ab may be driven by a power converter, such as FIG. 1, which drives the indoor fan motor 109bb and the outdoor fan motor 150bb, respectively.

17 is a perspective view illustrating a refrigerator that is another example of a home appliance according to an exemplary embodiment of the present invention.

Referring to the drawings, the refrigerator 100c according to the present invention, although not shown, has a case 110c having an inner space partitioned into a freezer compartment and a refrigerating compartment, a freezer compartment door 120c that shields the freezer compartment, and a refrigerating compartment. A rough appearance is formed by the refrigerating compartment door 140c.

In addition, the front surface of the freezing compartment door 120c and the refrigerating compartment door 140c is further provided with a door handle 121c protruding forward, so that the user easily grips and rotates the freezing compartment door 120c and the refrigerating compartment door 140c. Make it work.

On the other hand, the front of the refrigerator compartment door 140c may be further provided with a home bar 180c, which is a convenient means for allowing a user to take out a storage such as a beverage contained therein without opening the refrigerator compartment door 140c.

In addition, the front of the freezer compartment door 120c may be provided with a dispenser 160c, which is a convenient means for allowing the user to easily take out ice or drinking water without opening the freezer compartment door 120c, such a dispenser 160c. An upper side of the control panel 210c may be further provided to control the driving operation of the refrigerator 100c and to show a state of the refrigerator 100c in operation on the screen.

Meanwhile, although the dispenser 160c is illustrated as being disposed on the front surface of the freezer compartment door 120c, the present invention is not limited thereto, and the dispenser 160c may be disposed on the front side of the refrigerator compartment door 140c.

Meanwhile, an ice maker 190c for ice-making water supplied using cold air in the freezer compartment and an ice bank mounted inside the freezer compartment (not shown) are included in the freezer compartment (not shown). 195c may be further provided. In addition, although not shown in the drawing, an ice chute (not shown) may be further provided to guide the ice contained in the ice bank 195c to fall into the dispenser 160c.

The control panel 210c may include an input unit 220c including a plurality of buttons, and a display unit 230c for displaying a control screen and an operation state.

The display unit 230c displays information such as a control screen, an operating state, and a temperature inside the refrigerator. For example, the display unit 230c may display a service type of the dispenser (ice ice, water, flake ice), a set temperature of the freezer compartment, and a set temperature of the refrigerator compartment.

The display unit 230c may be implemented in various ways, such as a liquid crystal display (LCD), a light emitting diode (LED), and an organic light emitting diode (OLED). In addition, the display unit 230c may be implemented as a touch screen capable of performing the function of the input unit 220c.

The input unit 220c may include a plurality of operation buttons. For example, the input unit 220c may include a dispenser setting button (not shown) for setting a service type of the dispenser (ice, water, ice, etc.), and a freezer temperature setting button (not shown) for setting a freezer temperature. And, it may include a refrigerator compartment temperature setting button (not shown) for setting the freezer compartment temperature. The input unit 220c may be implemented as a touch screen that can also perform the function of the display unit 230c.

Meanwhile, the refrigerator according to the embodiment of the present invention is not limited to the double door type illustrated in the drawings, but is a one door type, a sliding door type, a curtain door type. (Curtain Door Type) and other forms.

FIG. 18 is a view schematically illustrating the configuration of the refrigerator of FIG. 17.

Referring to the drawings, the refrigerator 100c receives the compressor 112c, the condenser 116c condensing the refrigerant compressed by the compressor 112c, and the refrigerant condensed by the condenser 116c, and evaporates it. A freezer compartment evaporator 124c disposed in a freezer compartment (not shown) and a freezer compartment expansion valve 134c for expanding a refrigerant supplied to the freezer compartment evaporator 124c may be included.

On the other hand, in the figure, but illustrated as using one evaporator, it is also possible to use each evaporator in the refrigerating chamber and freezing chamber.

That is, the refrigerator 100c is a three-way valve for supplying a refrigerator evaporator (not shown) arranged in the refrigerator compartment (not shown) and the refrigerant condensed in the condenser 116c to the refrigerator compartment evaporator (not shown) or the freezer compartment evaporator 124c. (Not shown) and a refrigerator compartment expansion valve (not shown) for expanding the refrigerant supplied to the refrigerator compartment evaporator (not shown).

In addition, the refrigerator 100c may further include a gas-liquid separator (not shown) in which the refrigerant passing through the evaporator 124c is separated into a liquid and a gas.

In addition, the refrigerator 100c further includes a refrigerator compartment fan (not shown) and a freezer compartment fan 144c that suck cold air that has passed through the freezer compartment evaporator 124c and blow it into a refrigerator compartment (not shown) and a freezer compartment (not shown), respectively. can do.

In addition, the compressor driving unit 113c for driving the compressor 112c, a refrigerator compartment fan driver (not shown) and a freezer compartment fan driver 145c for driving the refrigerator compartment fan (not shown) and the freezer compartment fan 144c may be further included. have.

Meanwhile, according to the drawing, since a common evaporator 124c is used in the refrigerating compartment and the freezing compartment, in this case, a damper (not shown) may be installed between the refrigerating compartment and the freezing compartment, and the fan (not shown) is one evaporator. The cold air generated in the air may be forced to be supplied to the freezing compartment and the refrigerating compartment.

The compressor 112c of FIG. 18 may be driven by a power converter, such as FIG. 1, which drives the compressor motor.

Alternatively, the refrigerating compartment fan (not shown) or the freezer compartment fan 144c may be driven by a power converter, such as FIG. 1, respectively driving a refrigerating compartment fan motor (not shown) and a freezer compartment fan motor (not shown). .

The power conversion apparatus and the home appliance having the same according to an embodiment of the present invention are not limited to the configuration and method of the embodiments described above, but the embodiments may be modified in various ways. All or some of the embodiments may be optionally combined.

On the other hand, the motor driving method or the operation method of the home appliance of the present invention, it is possible to implement as a processor-readable code on a processor-readable recording medium provided in the power converter or the home appliance. The processor-readable recording medium includes all kinds of recording devices that store data that can be read by the processor.

In addition, while the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (8)

An inverter including a plurality of phase arm switching elements and a plurality of lower arm switching elements;
A plurality of phase arm gate drivers respectively outputting gate driving signals to gate terminals of the plurality of phase arm switching elements;
A plurality of phase cancer on-resistance elements disposed between the plurality of phase cancer switching elements and the plurality of phase cancer gate drivers;
And a plurality of phase arm off resistance elements connected to both ends of the plurality of phase arm on resistance elements, respectively.
The resistance values of the plurality of phase arm on resistance elements are different from each other,
The resistance values of the plurality of phase arm off resistance elements are different from each other,
The rising time of the switching waveform of the first switching element among the plurality of phase arm switching elements is a first period,
The polling time of the switching waveform of the first switching element among the plurality of phase arm switching elements is a second period longer than the first period,
The rising time of the switching waveform of the second switching element among the plurality of phase arm switching elements is a third period longer than the first period,
The polling time of the switching waveform of the second switching element among the plurality of phase arm switching elements is a fourth period longer than the third period and shorter than the second period. The method of claim 1,
The rising time of the switching waveform of the third switching element among the plurality of phase arm switching elements is a fifth period longer than the third period,
The polling time of the switching waveform of the third switching element among the plurality of phase arm switching elements is a sixth period shorter than the fourth period. The method of claim 1,
As the resistance values of the plurality of phase cancer on-resistance elements increase, and as the rising time of the switching waveform increases, the resistance values of the plurality of phase cancer off-resistance elements corresponding to the plurality of phase cancer on-resistance elements decrease, and the Power converter characterized in that the polling time is reduced. The method of claim 1,
A lower arm gate driver for outputting a gate driving signal to the gate terminals of the lower arm switching elements;
And a plurality of lower arm on resistance elements disposed between the plurality of lower arm switching elements and the lower arm gate driver. The method of claim 4, wherein
And a resistance value of the plurality of haam-on resistance elements is different from each other. The method of claim 4, wherein
And a plurality of lower arm off resistance elements connected to both ends of the plurality of lower arm on resistance elements, respectively.
And a resistance value of the plurality of lower arm off resistance elements is different from each other. The method of claim 1,
A plurality of lower arm gate drivers respectively outputting gate driving signals to gate terminals of the plurality of lower arm switching elements;
And a plurality of lower arm on resistance elements disposed between the plurality of lower arm switching elements and the plurality of lower arm gate drivers. A home appliance comprising the power converter of any one of claims 1 to 7.

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