KR20190012941A - A control circuit for driving a motor and a control method of a laundry treating apparatus including the control circuit. - Google Patents

Abstract

The present invention relates to a control circuit to operate a motor, capable of charging and recycling an induction current generated in the motor without waste and a laundry treating apparatus control method including the same. According to the present invention, the control circuit to operate a motor comprises: the motor to rotate a drum for storing laundry; a DC output terminal receiving power from the outside to output DC current for operating the motor; an inverter connected to the DC output terminal to convert the DC current into three-phase AC current so as to control operation of the motor; and a voltage detection unit to detect voltage of the DC output terminal. Moreover, the laundry treating apparatus control method comprises: a charging step of controlling the inverter to allow the current to flow from the motor to the DC output terminal when the motor is reduced; a checking step of checking whether the voltage of the DC output terminal reaches an allowable voltage (II); and a blocking step of controlling the inverter to prevent the current from flowing from the motor to the DC output terminal when the voltage of the DC output terminal reaches the allowable voltage (II).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control circuit for driving a motor and a control method for a garment processing apparatus including the same.

The present invention relates to a control circuit for driving a motor and a control method of a garment processing apparatus including the same. More particularly, to a control method capable of charging and reusing power only by a difference in software without additional hardware in a circuit capable of driving a motor.

Generally, in a garment disposal apparatus, when a garment is put in a washing liquid, the time is separated from the fiber by the chemical action of the detergent, but since the detergent only takes a long time, mechanical action such as friction or vibration is applied, And the like.

To this end, the garment handling device places the garment in a drum and applies a mechanical force to the garment while rotating the drum through the motor. The motor can rotate the drum by repeating driving and stopping.

In general, a BLDC (Brushless Less Direct Current) motor is used as the motor. The BLDC motor has a structure in which a permanent magnet is rotatably disposed inside a coil. Accordingly, if a current is supplied to the coil, the permanent magnet rotates due to the change in the magnetic field inside the coil, so that the electrical energy can be converted into mechanical energy.

However, when the power supplied to the coil is cut off or the motor decelerates, the motor functions as a generator. That is, even after the interruption of the power supply, the permanent magnet continues to rotate due to the inertia. The induction current is generated in the coil by the rotation of the permanent magnet, and the current flows in the direction opposite to the direction in which the current is supplied to the coil. As a result, the voltage inside the circuit rises, and the elements included in the circuit may be damaged.

Therefore, in order to solve the above problems, a conventional motor control circuit control method includes a step of electrically disconnecting a DC current stage that supplies DC power to the motor when the motor is powered down or decelerating the motor, Thereby preventing the regenerative current or the induced current from burning down the circuit.

Specifically, in order to prevent the induction current from flowing back to the circuit, the conventional motor control circuit uses a power generation braking system and a power braking system.

The power generation braking system is a braking system in which the motor is disconnected from the power source and a separate resistor is connected to the circuit to consume the power generated by the motor in the form of heat energy. It is naturally attenuated by wind pressure loss and stops.

However, the control method of the conventional motor control circuit has a problem that the induction current generated in the motor can not be used at all and is consumed.

In addition, in order to prevent the induction current from burning down the circuit, it is troublesome to dispose a separate component such as a battery or a bypass channel.

SUMMARY OF THE INVENTION The present invention provides a control method capable of charging an induction current generated in a motor without wasting it and reusing it.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control method capable of determining whether or not to charge by measuring a voltage charged by an induction current generated in a motor.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control method capable of stably charging and reusing electricity using only a basic motor control device without further configuration.

The present invention provides a control method capable of stably charging a motor and decelerating and stopping the motor.

SUMMARY OF THE INVENTION The present invention provides a control method capable of immediately using charged electric power.

An object of the present invention is to provide a control method capable of storing energy at the time of stopping the motor and improving the energy efficiency by using stored energy at the time of waiting and restarting the motor.

In order to solve the above-described problems, the present invention provides a motor control apparatus for a motorcycle, comprising: a motor for rotating a drum accommodating clothes; a DC output terminal for receiving DC from the outside to output a DC current for driving the motor; An inverter for converting a current into a three-phase alternating current to control the operation of the motor; and a voltage sensing unit for sensing a voltage of the DC output terminal, the control method comprising: A step of checking whether or not the voltage of the DC output terminal reaches the allowable voltage (II), the step of checking whether the voltage of the DC output terminal reaches the allowable voltage (II) The motor is controlled so as to block the movement of current from the motor to the DC output terminal, It provides a control method of a clothes treating apparatus, wherein performing the system.

In order to solve the above-mentioned problems, the present invention is characterized in that the disconnecting step is performed by controlling the inverter so that the inverter and the motor are electrically disconnected from the DC output terminal and become an independent closed circuit, A control method of the clothes processing apparatus is provided.

In order to solve the above-described problems, the present invention provides a control method of a garment processing apparatus, wherein the blocking step is performed until the motor is completely stopped.

In order to solve the above-described problems, the present invention further comprises a step of detecting whether the motor is driven when the voltage of the DC output terminal reaches the allowable voltage (II) in the checking step, Wherein the step of determining whether or not the motor is running is performed in the determining step.

The present invention provides a control method for a garment processing apparatus, wherein the allowable voltage (II) is set to a voltage lower than a burnout voltage at which the circuit starts to be burned.

In order to solve the above-mentioned problems, the present invention provides a method for controlling a motor, comprising: sensing an input voltage (I) to detect an input voltage (I) supplied to the DC output terminal before the motor is driven; II), wherein the allowable voltage (II) is set to a voltage higher than the input voltage (I).

In order to solve the above-described problems, the present invention provides a control method for a garment processing apparatus, wherein the charging step controls the inverter to generate a current having a phase opposite to the current when the motor is driven .

The present invention further provides a control method of a garment processing apparatus, characterized by further comprising a regeneration step of using power charged in the DC output stage to solve the above-described problems.

The present invention, in order to solve the above-mentioned problems, is characterized in that the regeneration step uses the electric power charged in the DC output stage when the motor starts to drive again or transfers the electric power to another load consuming a DC current A method of controlling a device is provided.

In order to solve the above-described problems, the present invention provides a motor control apparatus comprising: a motor for converting electrical energy into a rotational force; a DC output terminal for receiving DC power from an external source to output a DC current for driving the motor; An inverter for converting a direct current into a three-phase alternating current to control an operation of the motor; and a voltage sensing unit for sensing a voltage of the direct current output terminal, the control method comprising: A step of checking whether or not the voltage of the DC output terminal reaches the allowable voltage (II), the step of checking whether the voltage of the DC output terminal reaches the allowable voltage (II) And for blocking the current from moving from the motor to the DC output terminal, And a control system of the electric circuit is performed.

In order to solve the above-described problems, the present invention provides a motor control apparatus for a motor vehicle, comprising: a motor for rotating a drum accommodating clothes; a DC output terminal for receiving DC power from an external source to output a DC current for driving the motor; An inverter for converting a direct current into a three-phase alternating current to control the operation of the motor; and a voltage sensing unit for sensing a voltage of the direct current output terminal, the control method comprising: (I) sensing an input voltage (I) of a power supply for supplying power to an output terminal, a charging voltage setting step of setting an allowable voltage (II) that can be charged to the DC output terminal, And a charging step of allowing a current to flow to an output terminal, wherein the allowable voltage (II) is set to a voltage higher than the input voltage (I) And a control device for controlling the clothes processing apparatus.

In order to solve the above-described problems, the present invention provides a control method of a garment processing apparatus characterized in that the allowable voltage (II) is set to a voltage lower than a burnout voltage at which the circuit begins to be burned.

The present invention provides a method of controlling a garment processing apparatus, wherein the charging step is performed when the motor decelerates to solve the above-described problems.

In order to solve the above-described problems, the present invention provides a control method for a garment processing apparatus, wherein the charging step controls the inverter to generate a current having a phase opposite to a current when the motor is driven.

In order to solve the above-described problems, the present invention provides a method for controlling a motor vehicle, comprising the steps of: checking whether a voltage of the DC output terminal reaches the allowable voltage (II), and controlling the inverter when the voltage of the DC output terminal reaches the allowable voltage And a blocking step of blocking a current from moving from the motor to the DC output terminal is performed.

In order to solve the above-described problems, the present invention further includes a determining step of determining whether the motor is driven when it is detected that the voltage of the DC output terminal reaches the allowable voltage (II) in the checking step, Wherein the control step is performed when the motor is running in the determining step.

In order to solve the above-mentioned problems, the present invention provides a method of controlling a motor, comprising: a step of controlling the inverter so that the inverter and the motor are separated from the DC output stage and become an independent closed circuit to decelerate the motor, And controlling the inverter to decelerate the motor.

In order to solve the above-described problems, the present invention provides a control method for a garment processing apparatus, wherein the cutting step is performed until the motor is completely stopped.

The present invention further provides a control method of a garment processing apparatus, characterized by further comprising a regeneration step of using electric power charged in the DC output stage to solve the above-described problems.

The present invention, in order to solve the above-described problems, is characterized in that the regenerating step uses the charged power of the DC output stage when the motor starts to drive again, or transmits the charged power to another load consuming DC current As shown in FIG.

In order to solve the above-described problems, the present invention provides a motor control apparatus for a motor vehicle, comprising: a motor for converting electrical energy into rotational force; a DC output terminal for receiving a power from the outside to output a DC current for driving the motor; 1. A control method for an electric circuit including an inverter for converting a direct current into a three-phase alternating current and controlling an operation of the motor, and a voltage sensing unit for sensing a voltage of the direct current output terminal, (I) for sensing an input voltage (I) of a power supply for supplying power to the DC output terminal, a charging voltage setting step of setting an allowable voltage (II) , The permissible voltage (II) being set to a voltage higher than the input voltage (I) And a control method of the electric circuit.

The present invention has an effect of providing a control method capable of stably charging and reusing electricity only in a basic DC output stage, an inverter, and a motor without additional configuration in a circuit for controlling a motor using a conventional BLDC motor.

The present invention provides a control method capable of preventing a circuit from being burned down in deceleration of a motor.

The present invention provides a control method capable of stably charging the electric power and decelerating and stopping the motor.

The present invention provides a control method capable of immediately using charged electric power.

The present invention provides a control method capable of storing energy at the time of stopping the motor and improving the energy efficiency by using the stored energy at the time of waiting and restarting the motor.

Fig. 1 shows a perspective view of the clothes processing apparatus of the present invention.
2 is a cross-sectional view of the clothes processing apparatus of the present invention.
Fig. 3 shows a control circuit of the motor of the present invention which can be applied to the clothes processing apparatus of the present invention.
4 shows a control method of the control circuit of the motor of the present invention.
Fig. 5 shows an embodiment of an inverter circuit when the motor is driven.
Fig. 6 shows an embodiment of an interbere circuit in a charged state.
Fig. 7 shows an embodiment of the inverter circuit in the interruption step.
8 shows a DC output terminal voltage state showing a control method of the present invention.

Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. In this specification, the same or similar reference numerals are given to the same or similar components in different embodiments, and the description thereof is replaced with the first explanation. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. In addition, it should be noted that the attached drawings are only for easy understanding of the embodiments disclosed in the present specification, and should not be construed as limiting the technical idea disclosed in the present specification by the attached drawings.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood, however, that the specific structural and functional embodiments are provided by way of illustration only, and are not intended to limit the invention to the particular forms disclosed, and all changes, modifications and variations that fall within the spirit and scope of the invention, It is to be understood that the invention includes equivalents and alternatives. In addition, the same reference numerals are used for the same constituent elements in the drawings, and redundant explanations for the same constituent elements are omitted.

1 and 2 show a basic structure of a garment processing apparatus according to an embodiment of the present invention. In the orthogonal coordinate system shown in the figure, the positive direction and the negative direction of the x-axis are respectively defined as forward and backward of the home appliance, and the positive direction and the negative direction of the z-axis are defined as the upper and lower directions of the home appliance do. The positive direction of the y-axis is defined as the right side of the household appliance, and the negative direction of the y-axis is defined as the left side of the appliance.

The household appliances are used to increase the convenience of the user at home and are electrically driven devices. For example, the household appliance may include a clothes processing apparatus, a dishwasher, a refrigerator, and the like. Although FIGS. 1 and 2 show a garment processing apparatus 100 as an example of a household appliance, the present invention is not limited thereto, and can be applied to various household appliances provided with the same or similar appliances. Hereinafter, the description will be limited to the clothes processing apparatus 100 for convenience of explanation.

1, the clothes processing apparatus 100 includes a cabinet 10, a tub 20 provided inside the cabinet 10 to store washing water, a tub 20 rotatably installed in the tub 20, A motor 40 for rotating the drum 30, a water supply pipe 70 for supplying the washing water into the tub 20 and a drain pipe for discharging the washing water of the tub 20 to the outside, (72).

The cabinet 10 forms an appearance of the clothes processing apparatus 100 and may include a loading port 12 through which the clothes can be inserted and removed and a door 13 opening and closing the loading port 12. The door 13 is rotatably connected to the front surface of the cabinet 10 and the inlet 12 can be opened or closed according to the rotation of the door 13. [

1 shows a garment disposal apparatus in which a charging port 12 and a door 13 are formed on a front surface of a cabinet 10 but the present invention is not limited thereto. 10). Hereinafter, only the case where the input port 12 and the door 13 are formed on the front surface of the cabinet 10 will be described for convenience of explanation.

A detergent box 14 and a control panel 16 may be further provided on the front surface of the cabinet 10. The detergent box 14 and the control panel 16 may be disposed above the inlet 12.

The detergent box 14 is provided so as to be pulled out forward, and a powder detergent or a liquid detergent can be stored therein. For example, the detergent box may be a drawer type

The control panel 16 may be provided at one side of the detergent box 14. The control panel 16 may include an input unit 18 for receiving input of option information related to the washing course and the laundry from the user and a display unit 17 for displaying the input information and the washing progress status. The input unit 18 may be a button type or a rotary knob type.

On the other hand, the control panel 16 may further include a microcomputer 300 (see FIG. 3) for controlling the clothes processing apparatus 100. The microcomputer 300 receives electric power from an external power source and can control electrical components of the clothes processing apparatus 100. At this time, since the electric components (hereinafter, load portions) are connected to the microcomputer 300 in parallel, the load units 250 (see FIG. 3) can operate independently of each other.

 The tub 20 is provided inside the cabinet 10 and can form a space for storing wash water. For example, the tub may have a cylindrical shape. The tub 20 can receive water from the outside through the water supply pipe 70 and can discharge water to the outside through the water discharge pipe 72. At this time, a water supply valve for supplying water and a drain pump for discharging water can be controlled by the microcomputer.

The tub 20 may include a tub inlet 21 capable of pulling out the clothes and a tub support 23 for fixing the tub 20 inside the cabinet 10. The tub inlet 21 can communicate with the inlet 12. The tub support portion 23 is provided below the tub 20 and can damp vibrations generated in the tub 20. [ For example, the tub support may include a damper, a spring, and the like.

The drum 30 may be rotatably installed in the tub 20 and may include a drum inlet 31 through which clothes can be drawn in and out. For example, the drum may have a cylindrical shape. The drum input port 31 can communicate with the input port 12 and the tub input port 21. Accordingly, the clothes can be introduced into the drum 30 through the inlet 12, the tub inlet 21, and the drum inlet 31 in sequence.

A gasket 19 may be further provided between the inlet 12 of the cabinet 10 and the tub inlet 21 of the tub 20. [ The gasket 19 prevents the washing water in the tub 20 from leaking to the cabinet 10 and prevents the vibration generated in the tub 20 from being transmitted to the cabinet 10. [ For example, the gasket may be formed of an elastic member.

A plurality of through holes (33) communicating with the tub (20) may be formed on the inner circumferential surface of the drum (30). The washing water contained in the tub 20 can be supplied into the drum 30 through the through holes 33 and the washing water in the drum 30 can be supplied to the tub 20 through the through holes 33. [ .

The clothes processing apparatus 100 may further include balancers 51 and 53 for attenuating vibrations generated in the drum 30. [ The balancers 51 and 53 can remove the eccentricity of the drum 30 which occurs when the clothes are biased to one side inside the drum 30. [ That is, the balancers 51 and 53 may be moved to a specific position under the control of the microcomputer to attenuate the unbalance of the drum 30. [

 At this time, the balancer may be provided on the front and rear sides of the drum 30, or may be provided on either the front side or the rear side of the drum 30. For example, the balancer may include a front balancer 51 and a rear balancer 53, which are provided in front of and behind the drum 30, respectively. The balancers 51 and 53 may be ball balancers, liquid balancers, and the like.

The motor 40 is provided outside the tub 20 and may be connected to the drum 30 through the back surface of the tub 20. [ The motor 40 is fixed to the back surface of the tub 20 and is capable of converting electrical energy into mechanical energy. That is, the drum 30 can be rotated by receiving a current from the outside.

The motor 40 includes a stator 41 that generates a magnetic field, a rotor 43 that rotates by the magnetic field inside the stator 41, and a drum 30 that passes through the back surface of the tub 20, And a rotary shaft 45 connecting the rotor 43. For example, the motor may be a BLDC (Brushless Less Direct Current) motor. In this case, the stator 41 may be composed of a coil and the rotor 43 may be a permanent magnet. On the other hand, the bottom surface of the tub 20 may further include a rotary shaft bearing 25 for rotatably supporting the rotary shaft 45.

The garment treating apparatus is configured to apply the clothes to the drum 30 and to supply the water to the tub 20 and then to drive the motor 40 to stir the drum 30 left and right, So that the washing, rinsing, and dewatering steps can be performed. If the clothes processing apparatus is provided as a dryer, clothes may be put into the drum 30 and the motor 40 may be driven to perform the drying process.

The clothes processing apparatus may include a motor control circuit for driving the motor (40).

Fig. 3 shows an embodiment of a motor control circuit (motor control device) that can be applied to the clothes processing apparatus of the present invention.

The motor control circuit of the present invention includes an external power source 200 for supplying an alternating current, a rectifier 210 for rectifying the alternating current into a ripple current, a smoothing unit 220 for smoothing the ripple current to output a direct current, And an inverter 230 for controlling the operation of the motor 40 by converting the direct current into a three-phase alternating current. That is, the motor 40 may be rotated by an electric signal generated by the inverter 230.

The power source 200 may be a commercial power source for supplying alternating current to the clothes processing apparatus 100. For example, the power source can supply a 60 Hz alternating current of 220V voltage to the clothes processing apparatus 100. The power supplied from the power source 200 can be supplied to each electric component of the clothes processing apparatus 100 requiring power such as the display unit 17 as well as driving the motor 40. [

The rectifying unit 210 can rectify the AC supplied from the power source 200 and convert it into DC. For example, the rectifier may be a bridge rectifier having four diodes connected thereto. The bridge rectifier may remove the AC component and output a pulsating DC current. At this time, the operation of the rectifying unit 210 can be controlled by the microcomputer.

The smoothing unit 220 is connected to the downstream end of the rectifying unit 210 and can remove the ripple component from the ripple current output from the rectifying unit 210 to output a DC current. That is, the alternating current supplied from the power source 200 is converted into a direct current having a constant voltage through the rectifying part 210 and the smoothing part 220, and the converted direct current can be supplied to the inverter 230. For example, the smoothing portion may be a capacitor. The capacitor is composed of a pair of electrode plates with an insulator interposed therebetween, and can store charges. In this case, the amount of charge that can be stored in the capacitor, that is, the capacitance, is proportional to the area of the electrode plate and the dielectric constant of the insulator, and may be inversely proportional to the interval between the electrode plates.

DC voltage flows through the smoothing part 220 and the front end of the inverter 230 through the rectifying part 210. Therefore, the smoothing unit 220 and its front and rear portions can be referred to as a DC output stage. Hereinafter, for convenience of explanation, both ends AB of the capacitor, that is, points A and B in FIG. 4 are defined as a " DC output stage AB ". The current output from the DC output terminal AB may be provided to the motor 40 via the inverter 230. [

The inverter 230 may include a plurality of switching elements 231, 232, 233, 236, 237, and 238 connected to the DC output terminal AB and outputting a three-phase alternating current. For example, the switching devices may include an insulated gate bipolar transistor (IGBT) and a plurality of diodes. The IGBT is a semiconductor device capable of high-speed switching and can be turned-on or turned-off by the microcomputer 300.

The switching elements 231, 232, 233, 236, 237, and 238 include three pairs of switching elements connected in parallel to each other. Each of the switching elements 231, 232, 233, And may include switching elements. For example, the first switching elements 231 and 236, the second switching elements 232 and 237, and the third switching elements 233 and 238 are connected in parallel with each other, The first switching device 231 connected to the A point of the DC output stage AB and the second switching device 236 connected to the B point of the DC output stage AB.

The microcomputer 300 can control the rotation of the motor 40 by controlling the operation of the inverter 230. [ For example, the microcomputer 300 may control ON / OFF of the switching elements 231, 232, 233, 236, 237 and 238 through pulse width modulation (PWM) control. That is, the microcomputer 300 can output a pulse-shaped control signal having an arbitrary variable frequency to the inverter 230. The control signals enable the switching elements 231, 232, 233, 236, 237 and 238 to be selectively turned on or off so that the inverter 230 generates three-phase alternating current The current can be supplied to the stator 41 of the motor 40. The direction of the magnetic field formed in the stator 41 also changes continuously due to the change in the direction of the current input to the stator 41. Such a change in the magnetic field direction can rotate the rotor 43. [ The rotation of the rotor 43 is transmitted to the drum 30 through the rotary shaft 45 to rotate the drum 30.

The motor control circuit includes a load unit 250 connected in parallel at a rear end of the smoothing unit 230 and capable of receiving an external power source 200 or an electric energy stored in the smoothing unit 230, A switch 260 for determining power supply to the load unit 250 may be further connected. The motor control circuit includes a voltage sensing unit 280 for measuring the voltage of the DC output terminal including the smoothing unit 220 and a sensor 310 for sensing whether the current value of the motor 40 is driven or not . Since the sensor 310 senses whether the motor 40 is driven, the sensor 310 may be provided with a Hall sensor for sensing magnetic force.

The load unit 250 may be configured to consume DC power, and may be an SMPS or the like that controls a PCB.

The microcomputer 300 may determine to open and close the switch 260 according to a predetermined control mode and supply power to the load unit 250. The sensor 310 and the voltage sensing unit 280 to sense the voltage state of the DC output terminal AB and the operation and driving state of the motor 40. The microcomputer 300 may control the motor control circuit based on the sensed information.

On the other hand, if the power supply to the motor 40 is stopped while the rotor 43 is rotating, the motor 40 can function as a generator. That is, even if the power supply is interrupted, an induction current or a regenerative current may be generated in the stator 41 by the rotating rotor 43. The induced current can flow in a direction opposite to the direction in which current is supplied from the inverter 230 to the stator 41. [ Thus, the electric power generated by the induced current is defined as the regenerative energy.

Meanwhile, the regenerative current passes through the inverter 230 as it is, flows in the direction of the direct current output terminal AB, and can increase the voltage formed at the direct current output terminal AB.

The capacitor 220 has a constant internal voltage depending on the type of the capacitor 220. When a current is applied from the power supply 200, a constant voltage is formed across the capacitor AB. The internal voltage is a threshold voltage Lt; / RTI > That is, if a regenerative current or an induction current flows through the capacitor 220 and a voltage exceeding a threshold value is formed at both ends AB, the capacitor 220 may be damaged. Also, the IGBT may have a constant withstand voltage, and may be damaged if a voltage exceeding a threshold value is formed across the IGBT.

On the other hand, the voltage increase of the DC output terminal AB may mean that the DC output terminal AB is charged with a certain amount of electric energy. However, if the voltage formed at the DC output terminal AB exceeds the breakdown voltage of the smoothing unit 220 due to the regenerative energy, the capacitor constituting the smoothing unit 220 may be damaged.

The motor control circuit of the present invention does not have a battery for separately storing the regenerative current or a bypass circuit for preventing the regenerative current from moving to the DC output stage AB.

Therefore, the control method of the conventional control circuit having the motor control circuit according to the present invention originally cut off the transfer of the regenerative current generated in the motor to the DC output terminal AB when the motor 40 decelerates. That is, in the conventional circuit control method including the motor control circuit as in the present invention, when the current is decelerated, the switch terminal of the inverter 230 is appropriately controlled to prevent the induction current from being transmitted to the DC output terminal AB, Is destroyed in the motor (40) and the inverter (230).

However, when the inverter 230 is controlled like the conventional motor control circuit, the regenerative current generated in the motor can not be used at all, resulting in a problem of low energy efficiency.

In order to solve this problem, the control method of the control circuit of the present invention permits the regenerative current of the motor to be charged to the DC output terminal and is reused, but it is possible to prevent burnout of the control circuit. In other words, the motor control circuit of the present invention can be safely reused by charging the regenerative energy in the basic structure by a software control method without any additional configuration.

Hereinafter, a method of controlling the motor control circuit of the present invention will be described with reference to FIG.

The control method of the motor control circuit of the present invention may perform an acceleration and drive operation step S2-1 to start driving the motor 40 and a rapid deceleration control step S2-2 to decelerate the motor.

In the acceleration and drive operation step S2-1, the microcomputer 300 controls the inverter 230 so that the motor 40 is driven. In the acceleration and drive operation step S2-1, the inverter 230 is controlled by the pulse width modulation The ON / OFF control of the elements 231, 232, 233, 236, 237, and 238 is controlled.

5 is a view illustrating an example of supplying current from the DC output terminal AB to the motor 40 to drive the motor 40. The microcomputer 300 controls the first switching device Only the lower switching element 236 is turned ON in the stages 231 and 236, only the upper switching element 232 is turned ON in the second switching element stage, and in the third switching element stage, The current can be transmitted from the DC output terminal AB to the motor 40 when only the ON state 233 is turned ON.

In the deceleration control step S2-2, the power supply itself supplied from the external power supply 200 is cut off to decelerate the motor 40 or to stop the driving of the motor 40 in a manner such as power generation braking It can mean.

At this time, if the motor 40 decelerates, the present invention controls the inverter 230 to allow the current to flow from the motor 40 to the DC output terminal AB, A step S4 of checking whether or not the voltage of the output terminal AB reaches the allowable voltage II and a step of controlling the inverter so that the voltage of the DC output terminal AB reaches the permissible voltage II, A blocking step S6 for blocking the current from moving to the DC output terminal AB may be performed.

The present invention differs from the prior art in that when the motor 40 is decelerated through the charging step S3, the regenerative current generated in the motor 40 is transferred to the DC output terminal AB, Allows regenerative energy to be collected.

6, only the upper-stage switch 231 of the first switching devices 231 and 236 is turned ON and only the lower-phase switch 237 of the second switching devices 232 and 237 is turned ON in the charging step (S3) And only the lower switch element 238 of the third switching elements 233 and 238 is turned on, the regenerative current generated by the motor 40 is transmitted to the DC output terminal AB as shown in the figure. Since the direction and phase of the current discharged at the DC output stage AB are 180 degrees different from each other, a voltage is further applied to the capacitor 220 to generate an effect that the regenerative energy is charged in the capacitor 200.

In other words, the regenerative current generated in the charging step S3 may be 180 degrees out of phase with the input current generated when the motor 40 is driven. That is, the microcomputer 300 can generate the regenerative current through the inverter (230) (q-control) and collect it in the capacitor (220).

The present invention can check whether or not the voltage AB of the DC output terminal reaches the allowable voltage II in the checking step S4. In the checking step S4, the microcomputer 300 can check whether the voltage AB of the DC output terminal has reached the allowable voltage II in real time through the voltage sensing unit 280. [

The allowable voltage (II) may be set to a voltage lower than a burnout voltage at which the control circuit starts to be burned out. That is, the allowable voltage (II) can basically be set to a smaller value among the allowable withstand voltage of the switching elements of the capacitor 220 and the inverter 230 of the control circuit. This is because if any one of the terminals of the control circuit is destroyed, the entire control circuit can not perform its function.

When the voltage of the capacitor 220 starts to reach the allowable voltage (II), the microcomputer 300 outputs the regenerated current to the capacitor 220 through the blocking step S6 ) Immediately.

The blocking step S6 controls the inverter 230 so that the inverter 230 and the motor 40 are electrically separated from the DC output terminal AB to be an independent closed circuit, The inverter 230 can be controlled so that the current itself does not flow.

That is, in the blocking step S6, the regenerative current is consumed on the inverter 230 or the regenerative current is prevented from flowing into the inverter 230 so that the regenerative current is self-consumed. Thus, the regenerative current is no longer allowed to flow into the DC output terminal AB, and it is possible to prevent the voltage exceeding the allowable voltage II from being applied to the DC output terminal AB.

For example, in the blocking step S6, the microcomputer 300 controls the first and second switching elements 231 and 236 and the second switching element 232 and 237 of the inverter 230, Only the switching elements under all the switching elements 233 and 238 are turned ON to control the current generated in the motor 40 to flow only below the inverter 230.

This is because the effect that the motor 40 is supplied with a current different from that when the motor 40 is driven can be reduced and the motor 40 can be rapidly decelerated, which can be matched with the system of the power generation braking (see FIG. )

In the blocking step S6, all the switching elements of the inverter 230 are turned off so that the regenerative current generated in the motor 40 can not flow into the inverter 230, Or the like, and this can be matched with the restricting braking system.

The blocking step S6 may be performed when the voltage of the DC output terminal AB reaches the allowable voltage II and the motor 40 is still being driven, Can be performed until it is stopped. That is, in the control method of the present invention, when it is detected in step S4 that the voltage of the DC output terminal AB has reached the allowable voltage II, it is determined whether the motor 40 is being driven S5), and the blocking step S6 may be performed when it is detected that the motor 40 is being driven in the determining step S5. If the motor 40 is completely stopped, the regenerative current is no longer generated in the motor 40, so that it is not necessary to perform the blocking step S6.

Referring to FIG. 4 again, the present invention may include an input voltage sensing step S1 for sensing an input voltage I supplied to the DC output terminal AB before the motor 40 is driven, And a charging voltage setting step (S2) for setting the allowable voltage (II) that can be charged to the DC output terminal (AB).

If the permissible voltage (II) permitting the charging in the charging step (S3) is set lower than or equal to the burn-out voltage, burn-out of the control circuit can be prevented. However, if the voltage to be charged is lower than the input voltage I for driving the motor 40, there is a disadvantage that the electric power charged in the capacitor 220 can not be reused to drive the motor 40 have. Further, sufficient electric energy can be stored in the condenser 220 only when the allowable voltage II is set higher than the input voltage I, and when the charged electric energy is used to drive the motor 40 again But also to the load unit 250 using a DC power source.

Therefore, when the input voltage I supplied to the DC output terminal AB is sensed by the voltage sensing unit 280 before the motor is driven, the microcomputer 300 calculates the allowable voltage II It is always possible to set the voltage higher than the input voltage (I).

Accordingly, sufficient electric energy can be collected in the condenser 220, so that it can be reused not only for re-driving the motor 40 but also for supplying the load unit 250, thereby maximizing the energy efficiency.

Thus, the allowable voltage (II) can be set higher than the input voltage (I) and lower than the burnout voltage.

Referring to FIG. 8, the control method of the present invention differs from the conventional control method in voltage width. 8A shows a conventional control method in which the input DC voltage I of the input DC output terminal AB remains unchanged but the actual DC DC voltage III changes due to acceleration and deceleration of the motor 40. [ At this time, even if a regenerative current is generated before the stop of the motor 40 or the stoppage of the motor due to the deceleration of the motor 40, it is not transferred to the DC output terminal AB and charging is not permitted. III becomes equal to the input voltage I.

8 (b) is a control method of the present invention. When the motor decelerates, the DC output terminal AB is charged up to the allowable voltage II, so that the voltage of the DC output terminal AB becomes the allowable voltage II).

Thereafter, the voltage raised to the DC output terminal AB may be used when the motor 40 is driven again.

Meanwhile, in the control method of the present invention, when the motor (40) starts to drive the electric power charged in the DC output terminal (AB) at the end of the cutoff step (S6) 250), as shown in FIG.

In the regenerating step S7, it can be said that the energy efficiency is increased by using the electric power charged in the DC output terminal AB.

When the switch 260 is turned off in the regenerating step S7, the microcomputer 300 does not transfer the energy stored in the capacitor 220 to the load unit 250, Can be reused for driving. When the microcomputer 300 turns on the switch, the energy stored in the capacitor 220 can be used for the operation of the load unit 250. The microcomputer 300 can determine through the switch 260 whether or not to use the energy stored in the load unit 250 and the motor 40. At least the motor 40 is stopped and re- It is desirable to determine this before starting.

As described above, the control method of the motor control circuit according to the exemplary embodiments prevents the components constituting the circuit from being damaged by charging and selectively using the regenerative energy generated when the motor 40 is braked Energy efficiency can be increased by using the charged energy as auxiliary power.

The present invention may be embodied in various forms without departing from the scope of the invention. Accordingly, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

10: cabinet 12: inlet
13: door 14: detergent box
16: Control panel 17:
18: input part 19: gasket
20: tub 21: tub inlet
23: tub support 25: rotary shaft bearing
30: Drum 31: Drum inlet
33: through hole 40: motor
41: stator 43: rotor
45: rotation shaft 47: motor control section
51: front balancer 53: rear balancer
70: water pipe 72: water pipe
100: garment processing apparatus 200: power source
210: rectification part 220:
230: Inverter
250: load section 260: switch
300: Microcomputer

Claims (10)

A DC output terminal connected to the DC output terminal for converting the DC current into a three-phase alternating current, and for outputting a DC current for driving the motor, A control method of a garment processing apparatus including an inverter for controlling an operation of a motor and a voltage sensing unit for sensing a voltage of the DC output terminal,
A charging step of controlling the inverter to allow current to flow from the motor to the DC output terminal when the motor decelerates;
An inspection step of checking whether the voltage of the DC output terminal has reached the allowable voltage (II);
And a blocking step of controlling the inverter to block a current from moving from the motor to the DC output terminal when the voltage of the DC output terminal reaches the allowable voltage (II).
The method according to claim 1,
The blocking step
The inverter and the motor are electrically separated from the DC output terminal to control the inverter to be an independent closed circuit,
And controls the inverter so that the current itself does not flow to the inverter.
3. The method of claim 2,
Wherein the cutting step is performed until the motor is completely stopped.
The method according to claim 1,
Further comprising a step of detecting whether the voltage of the DC output terminal reaches the allowable voltage (II) in the checking step,
Wherein the blocking step is performed when it is detected that the motor is being driven in the determining step.
The method according to claim 1,
Wherein the permissible voltage (II) is set to a voltage lower than a disconnection voltage at which the DC output terminal or the inverter starts to be burned.
6. The method of claim 5,
Sensing an input voltage (I) to sense an input voltage (I) supplied to the DC output stage before the motor is driven;
And setting a permissible voltage (II) that can be charged to the DC output terminal,
Wherein the allowable voltage (II) is set to a voltage higher than the input voltage (I).
The method according to claim 1,
Wherein the charging step controls the inverter to generate a current having a phase opposite to the current when the motor is driven.
The method according to claim 1,
And a regeneration step of using power charged in the DC output terminal.
9. The method of claim 8,
Wherein the regenerating step uses the charged power of the DC output terminal when the motor starts to drive again or transmits the charged power to another load that consumes the DC current.
A direct current output terminal connected to the direct current output terminal and configured to convert the direct current into a three phase alternating current, A control method of a motor control circuit including an inverter for controlling an operation of a motor and a voltage sensing unit for sensing a voltage of the DC output terminal,
A charging step of controlling the inverter to allow current to flow from the motor to the DC output terminal when the motor decelerates;
An inspection step of checking whether the voltage of the DC output terminal has reached the allowable voltage (II);
And a blocking step of controlling the inverter to block the current from moving from the motor to the DC output terminal when the voltage of the DC output terminal reaches the allowable voltage (II).

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