JP6713753B2 - Washing machine controller and washing machine - Google Patents

Description

The present invention relates to a device for controlling a voltage of a driving power supply supplied to an inverter circuit that drives a motor of a washing machine, and a washing machine including the device.

Conventionally, in order to improve the rotation torque of a motor driven through an inverter circuit, the driving power supplied to the inverter circuit has been boosted. For example, in Patent Document 1, the boosting is soft-started before the dehydration operation is started, and the constant voltage is controlled during the dehydration operation. Further, in Patent Document 2, a reactor, a rectifier circuit that generates a DC power supply, and a means that short-circuits the AC input terminals of the rectifier circuit are connected between the AC power supply and the inverter circuit, and the AC power supply voltage Within a half cycle, AC input terminals are short-circuited a plurality of times to cause a current to flow in the reactor, thereby boosting the DC power supply bus voltage.

JP, 2008-183087, A JP, 2010-273505, A

However, in the control method of Patent Document 1, since boosting is performed even in a low rotation region where boosting is not necessary, there is a problem that the circuit loss increases and the temperature of the reactor or the like rises excessively. In addition, in the control method of Patent Document 2, when the boosting degree is set to be large, it affects the control of the motor to cause fluctuations in the number of revolutions and abnormal noise, and damages the circuit elements due to overvoltage. There's a problem.

Therefore, there is provided a washing machine control device and a washing machine that can boost the driving power supply without affecting the rotation control of the motor as much as possible.

According to the washing machine control device of the embodiment,
A booster circuit for boosting the drive power supply supplied to the inverter circuit for driving the motor,
A control circuit that controls boosting by the booster circuit and that controls driving of the motor through the inverter circuit,
The control circuit controls the speed at which the voltage of the driving power supply is changed to a target voltage by starting or ending the boosting when the rotation speed of the motor is controlled to match the command rotation speed. It is slower than the response speed of the calculation performed by the circuit .

It is 1st Embodiment and is a figure which shows schematically the drive control system of each motor in a washing-drying machine. Vertical side view showing the structure of a drum type washer/dryer Flowchart schematically showing the operation of the dehydration operation Flowchart schematically showing the operation process of the compressor accompanying the execution of the drying operation Flowchart showing start/end determination processing of boost control Flowchart showing start/end determination processing of power factor improvement control Flowchart showing boosting control start processing Flowchart showing the second and subsequent short-circuit operation processing Diagram showing an example of power supply voltage and current waveforms The figure which shows the waveform when pressurizing is performed in the high-speed rotation area of the dehydration operation. The figure which shows the waveform at the time of pressurizing in the high-speed rotation area of the dehydration operation in the prior art. It is 2nd Embodiment and is a flowchart which shows the start/end determination process of pressure|voltage rise control. It is 3rd Embodiment and is a flowchart which shows the start/end determination process of pressure|voltage rise control. It is 4th Embodiment and is a flowchart which shows the start/end determination process of pressure|voltage rise control.

(First embodiment)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 11. FIG. 2 is a vertical sectional side view showing the configuration of the drum type washer/dryer. The outer case 1 has a hollow shape including a front plate, a rear plate, a left side plate, a right side plate, a bottom plate and a top plate, and a front plate of the outer case 1 is formed with a through-hole-shaped inlet/outlet 2. A door 3 is attached to the front plate of the outer box 1. The door 3 can be operated by a user from the front between the closed state and the open state. The door 2 is closed when the door 3 is closed, and the door 2 is opened when the door 3 is open. A water receiving tank 4 is fixed inside the outer box 1. The water receiving tank 4 has a cylindrical shape with a closed rear surface, and is arranged in an inclined state in which the axial center line CL descends from the front to the rear. The front surface of this water receiving tank 4 is open, and when the door 3 is closed, the door 3 closes the front surface of the water receiving tank 4 in an airtight state.

A drum motor 5 is fixed to the rear plate of the water receiving tank 4 outside the water receiving tank 4. The drum motor 5 is a DC brushless motor whose speed is controllable, and the rotary shaft 6 of the drum motor 5 projects into the water receiving tank 4. The rotary shaft 6 is arranged so as to overlap the axial center line CL of the water receiving tank 4, and the drum 7 is fixed to the rotary shaft 6 inside the water receiving tank 4. The drum 7 has a cylindrical shape with a closed rear surface, and rotates integrally with the rotary shaft 6 when the drum motor 5 is operating. The front surface of the drum 7 faces the inlet/outlet 2 from the rear side through the front surface of the water receiving tank 4, and the inside of the drum 7 is opened from the front with the door 3 open, the front surface of the water receiving tank 4 and the drum 7. Laundry is taken in and out through the front.

A plurality of through holes 8 are formed in the drum 7, and the inner space of the drum 7 is connected to the inner space of the water receiving tank 4 through each of the plurality of through holes 8. A plurality of baffles 9 are fixed to the drum 7. Each of the plurality of baffles 9 moves in the circumferential direction around the axis CL as the drum 7 rotates, and the laundry in the drum 7 is caught by each of the plurality of baffles 9. While moving in the circumferential direction, it is agitated by falling by gravity.

A water supply valve 10 is fixed inside the outer case 1. The water supply valve 10 has an inlet and an outlet, and the inlet of the water supply valve 10 is connected to a tap for water. The water supply valve 10 uses a water supply valve motor 11 (see FIG. 2) as a drive source, and the outlet of the water supply valve 10 is switched between an open state and a closed state according to the rotation amount of the water supply valve motor 11. The outlet of the water supply valve 10 is connected to a water injection case 12, and tap water is injected into the water injection case 12 through the water supply valve 10 when the water supply valve 10 is open, and tap water is injected when the water supply valve 10 is closed. Not injected into the case 12. The water injection case 12 is fixed inside the outer box 1 at a position higher than the water receiving tank 4, and has a cylindrical water injection port 13. The water injection port 13 is inserted into the water receiving tank 4, and the tap water injected from the water supply valve 10 into the water injection case 12 is injected into the water receiving tank 4 from the water injection port 13.

The water receiving tank 4 is connected to an upper end portion of a drain pipe 14 located at the bottom, and a drain valve 15 is interposed in the drain pipe 14. The drain valve 15 uses a drain valve motor 16 (see FIG. 2) as a drive source, and is switched between an open state and a closed state according to the rotation amount of the drain valve motor 16. When the drain valve 15 is closed, the tap water injected from the water inlet 13 into the water receiving tank 4 is stored in the water receiving tank 4, and when the drain valve 15 is open, the tap water inside the water receiving tank 4 passes through the drain pipe 14. It is discharged to the outside of the water receiving tank 4.

A main duct 17 is fixed to the bottom plate of the outer box 1 below the water receiving tank 4. The main duct 17 has a tubular shape oriented in the front-rear direction, and the lower end of the front duct 18 is connected to the front end of the main duct 17. The front duct 18 has a cylindrical shape that is oriented in the vertical direction, and the upper end of the front duct 18 is connected to the internal space of the water receiving tank 4 at the front end of the water receiving tank 4. A fan casing 19 is fixed to the rear end of the main duct 17. The fan casing 19 has a through-hole-shaped intake port 20 and a cylindrical exhaust port 21, and the internal space of the fan casing 19 is connected to the internal space of the main duct 17 via the intake port 20.

A fan motor 22 is fixed to the fan casing 19 outside the fan casing 19. The fan motor 22 has a rotating shaft 23 protruding inside the fan casing 19, and a fan 24 is fixed to the rotating shaft 23 inside the fan casing 19. The fan 24 is a centrifugal type that sucks air in the axial direction and discharges the air in the radial direction. An intake port 20 of the fan casing 19 faces the fan 24 in the axial direction of the fan 24 and an exhaust port 21 of the fan casing 19. Are opposed to the fan 24 in the radial direction of the fan 24.

The lower end of the rear duct 25 is connected to the exhaust port 21 of the fan casing 19. The rear duct 25 has a tubular shape that is oriented vertically, and the upper end of the rear duct 25 is connected to the internal space of the water receiving tank 4 at the rear end of the water receiving tank 4. The rear duct 25, the fan casing 19, the main duct 17, the front duct 18, and the water receiving tank 4 constitute an annular circulation duct 26 having an inner space of the water receiving tank 4 as a start point and an end point, respectively. When the fan motor 22 is operating in the closed state, the air in the water tank 4 is sucked from the front duct 18 through the main duct 17 into the fan casing 19 based on the rotation of the fan 24 in a certain direction. The water is returned from the fan casing 19 into the water receiving tank 4 through the rear duct 25.

A compressor 27 is fixed inside the outer box 1. The compressor 27 is arranged outside the circulation duct 26 and has a discharge port for discharging the refrigerant and a suction port for sucking the refrigerant. The compressor 27 uses a compressor motor 28 (see FIG. 2) as a drive source, and the compressor motor 28 is composed of a DC brushless motor whose speed can be controlled.

A condenser (condenser) 29 is fixed inside the main duct 17. The condenser 29 is for heating air, and is constituted by fixing a plurality of plate-shaped heating fins 31 in contact with the outer peripheral surface of a single refrigerant pipe 30 bent in a meandering manner. .. The refrigerant pipe 30 of the condenser 29 is connected to the discharge port of the compressor 27, and the refrigerant discharged from the discharge port of the compressor 27 enters the refrigerant pipe 30 of the condenser 29 in the operating state of the compressor motor 28.

FIG. 1 schematically shows a drive control system of the drum motor 5, the fan motor 22, and the compression motor 28. The inverter circuit 34 is configured by connecting six IGBTs (switching elements) 35a to 35f in a three-phase bridge connection, and flywheel diodes 36a to 36f are connected between collectors and emitters of the respective IGBTs 35a to 35f. There is. Each phase output terminal of the inverter circuit 34 is connected to each phase winding of the drum motor 5.

The emitters of the IGBTs 35d, 35e, 35f on the lower arm side are connected to the ground via shunt resistors 37u, 37v, 37w. A common connection point between the emitters of the IGBTs 35d, 35e, 35f and the shunt resistors 37u, 37v, 37w is connected to an input terminal of a control circuit (microprocessor, microcomputer) 42A.

Although not shown, inside the control circuit 42A, a level shift circuit configured to include an operational amplifier is used to amplify the terminal voltage of the shunt resistors 37u to 37w and to set the output range of the amplified signal to the positive side (eg, , 0 to +3.3 V) bias is applied. Further, the control circuit 42A has a function of detecting an overcurrent in order to prevent the destruction of the circuit when the upper and lower arms of the inverter circuit 34 are short-circuited.

An inverter circuit 38 and a shunt resistor 39 (u, v, w) having the same structure are arranged for the fan motor 22, and an inverter circuit 40 and a shunt resistor 41 (u) for the compressor motor 28. , V, w) are arranged. The control of the inverter circuits 38 and 40 is performed by another control circuit 42B (microprocessor, microcomputer), short-circuit control means), and the control circuits 42A and 42B are capable of bidirectional communication by serial communication. ..

A drive power supply circuit 43 is connected to the input sides of the inverter circuits 34, 38, 40. The driving power supply circuit 43 is connected to an AC power supply of 100 V at one end side via a reactor (inductive reactor) 44, and has a full-wave rectification circuit 45 formed of a diode bridge and an output of the full-wave rectification circuit 45. And two capacitors 46a and 46b connected in series on the side. The common connection point of the capacitors 46 a and 46 b is connected to one of the input terminals of the full-wave rectifier circuit 45. When the boosting operation using the reactor 44, which will be described later, is not performed, the driving power supply circuit 43 double-voltage full-wave rectifies an AC power supply of 100V and supplies a DC voltage of about 280V to the inverter circuit 34 and the like. The driving power supply circuit 43 corresponds to a booster circuit.

Another full-wave rectifier circuit 47 (short-circuit means), which is also composed of a diode bridge, is connected in parallel to the input terminal of the full-wave rectifier circuit 45. , IGBT 48 (short-circuit means) are connected. The control circuit 42B performs on/off control of the IGBT 48. The driving power supply circuit 43 also includes a full-wave rectifier circuit 47 and an IGBT 48. The AC voltage detector 60 is connected to the input terminal of the full-wave rectifier circuit 45, and the output terminal of the AC voltage detector 60 is connected to the input terminals of the control circuits 42A and 42B.

A series circuit of resistors 49a and 49b and a series circuit of resistors 50a and 50b are connected between the input terminals of the inverter circuits 34 and 38, respectively, and their common connection points are the input terminals of the control circuits 42A and 42B. It is connected. The control circuits 42A and 42B detect the drive power supply voltage input to the inverter circuits 34 and 38 by referring to the voltage at each common connection point.

Further, for the drum motor 5, a position sensor 51 (u, v, w) composed of, for example, a Hall IC is arranged to detect the rotor position, and the sensor signal output by the position sensor 51 is , To the control circuit 42A. Further, a current sensor 52 such as a current transformer (CT) is inserted between the AC power supply and the reactor 44, and a sensor signal output from the current sensor 52 is given to the control circuit 42B. ..

The control circuits 42A, 42B detect the currents flowing in the windings of the respective phases of the motors 5, 22, 28, estimate the phase θ and the rotational angular velocity ω of the secondary side rotating magnetic field based on the current values, and An exciting current component Id and a torque current component Iq are obtained by performing orthogonal coordinate transformation and dq (direct-quadrature) coordinate transformation of the phase current. When the command rotation speed is given from the outside, the control circuits 42A and 42B generate current commands Idref and Iqref based on the estimated phase θ and rotation angular velocity ω and current components Id and Iq, and then generate the voltage commands Vd and Vq. When it is converted into, the rectangular coordinate conversion and the three-phase coordinate conversion are performed. Finally, the drive signal is generated as a PWM signal and output to each phase winding of the motors 5, 22, 28 via the inverter circuits 34, 38, 40. As a result, the rotation speed of the motor 5 is controlled so as to match the command rotation speed.

In the above configuration, the inverter circuit 34, the control circuits 42A and 42B, and the driving power supply circuit 43 form a driving device 61.
Next, the operation of this embodiment will be described with reference to FIGS. 3 to 11. FIG. 3 is a flowchart schematically showing the process of the dehydration operation. First, acceleration is performed so as to gradually increase the rotation speed of the drum 7 (S1), and when the rotation speed reaches 1000 rpm (S2: YES), permission for boosting control is set (S3). After that, when the preset dehydration time ends (S4: YES), the permission of the boost control is cleared (S5). Then, when the brake is operated (S6) and the rotation of the drum 7 is stopped (S7: YES), the dehydration operation ends.

FIG. 4 is a flowchart schematically showing the operation process of the compressor 27 accompanying the execution of the drying operation. When the compressor 27, that is, the compressor motor 28 is started (S1c), "power factor improvement control permission" is set (S2c). Then, when the operation of the compressor 27 is finished (S3c; YES), the "power factor improvement control permission" is cleared (S4c).

FIG. 5 is a flowchart showing the boosting control start/end determination processing that is executed in response to an interrupt that occurs every 1 msec. In step S3 shown in FIG. 3, if the boost control permission is set (S11: YES), it is determined whether or not the current status is "boost control in progress" (S12). If the boost control permission has not been set (S11: NO), the status of "boosting control in progress" is cleared (S16), and the interrupt processing ends. In step S16, when the boosting control is executed and the control is stopped, control is performed so that a target voltage described later is subtracted from the voltage at that time with a slope of 6 V/sec. Eventually, no boost pulse is generated.

In step S12, if the current status is not "boosting control in progress" (NO), whether the AC power supply current at that time is equal to or greater than a preset value for starting the boosting control (boosting start value, control parameter). It is determined (S13). The boosting start value is, for example, about 6 A when the power consumption is 550 W. If it is equal to or higher than the boost start value (YES), the status of "boosting control in progress" is set (S14), and the interrupt process is ended. If it is less than the boost start value (NO), the interrupt process is ended as it is. In step S14, the target voltage is set to 295V, for example. Further, when the step-up control is not being executed and the step-up control is being executed, the step-up control is performed so that the voltage is increased to the target voltage at a gradient of 6 V/sec.

In step S12, if the current status is “boost control in progress” (YES), whether the AC power supply current at that time is equal to or less than a preset value for stopping the boost control (boost stop value). Is determined (S15). If it is equal to or lower than the boost stop value (YES), the process proceeds to step S16, and if it is higher than the boost stop value (NO), the interrupt process is ended. The inclination of 6 V/sec in steps S14 and S16 is appropriately determined in consideration of the cycle of the rotation speed control, the setting of the control gain such as the PI control included in the loop of the vector control, and the like.

FIG. 6 is a flowchart showing the start/end determination process of the power factor correction control, which is also executed in response to an interrupt that occurs every 1 msec. In step S2c shown in FIG. 4, if the power factor improvement control permission is set (S11p: YES), it is determined whether or not the current status is "power factor improvement control is in progress" (S12p). If permission of power factor improvement control is not set (S11p: NO), the status of "during power factor improvement control" is cleared (S16p), and the interrupt process is terminated.

In step S12p, if the current status is not "power factor correction control in progress" (NO), the AC power supply current at that time is a preset power factor correction start value that is a value for starting the power factor correction control. It is determined whether or not the above (S13p). The power factor improvement start value is, for example, an AC current value of 6.4A. If the power factor improvement start value is exceeded (YES), the status of "power factor improvement control is in progress" is set (S14p), the interrupt process is terminated, and if it is less than the power factor improvement start value (NO), it is left as it is. End interrupt processing.

In step S12p, if the current status is "power factor correction control is in progress" (YES), the AC power supply current at that time is a value for stopping the preset power factor correction control. It is determined whether or not the value is the stop value or less (S15p). The power factor improvement stop value is, for example, an AC current value of 4.0A. If it is less than or equal to the power factor improvement stop value (YES), the process proceeds to step S16p, and if it exceeds the power factor improvement stop value (NO), the interrupt process is ended.

FIG. 7 is a flow chart showing the boosting control start processing, which is also executed in response to an interrupt occurring every 1 msec. If the current status is “boosting control in progress” (S21: YES), the delay time from the zero-cross point set according to the AC power supply current value at that time and the power supply frequency of 50 Hz or 60 Hz (for example, 1 It is set so that the short-circuit pulse is output in the time (pulse width, for example, 0.6 msec) of the first short-circuiting operation (ON of the IGBT 48) in 0.5 msec to 2 msec) (S22). On the other hand, if the current status is not "boosting control in progress" (S21: NO), the output of the short-circuit pulse is cleared, that is, the short-circuit operation is not performed (S23), and the interrupt processing ends.

FIG. 8 is a flowchart showing the second and subsequent short-circuit operation processing executed every half cycle of the AC power supply. If the short-circuit pulse is currently being output (immediately after the first short-circuit pulse is output) (S31: YES), it is determined whether the rotation speed (control parameter) of the drum 7 is 1600 rpm or more (S32). If the rotation speed has not reached 1600 rpm (NO), the number of outputs of the short-circuit pulse is set to one, that is, only the first short-circuit pulse is output (S35), and the interrupt processing ends.

In step S32, if the rotation speed is 1600 rpm or more (YES), it is determined whether the DC power supply voltage at that time is the target voltage or more (S33). If the DC power supply voltage is equal to or higher than the target voltage (YES), the limit is set to "6" and the number of short circuit pulses is increased by 1 (S34). When outputting a plurality of short-circuit pulses, the pulse output interval is, for example, 0.2 ms. The width of the pulse output at the second and third times is, for example, 0.15 msec, and the width of the pulse output at the fourth to sixth times is, for example, 0.075 msec. If the DC power supply voltage is less than the target voltage in step S33 (NO), the number of short circuit pulses is decreased by one from the number of pulses output in the current AC half cycle (S36).

FIG. 9 shows an example of actual power supply voltage/current waveforms. The commercial AC power supply is rated at 50 Hz/100 V, the DC power supply voltage is 304 V, and the number of short-circuit pulses is "4". In this case, the decrease value of the current at the time of starting the second and subsequent short-circuit operations and the decrease amount with respect to the current peak value in the AC half cycle, and the increase value and the same increase amount of the current due to the short-circuit operation are as follows. It has become.
Number of short circuits Decreasing value (decreasing amount) Increasing value (increasing amount)
The second 1.6A (10%) 3.4A (21%)
3rd 1.2A (7%) 3.0A (19%)
4th 1.2A (7%) 2.2A (14%)
These boosting control conditions are such that when a short circuit is performed a plurality of times within a half cycle of the AC power supply, the amount of decrease in the current at the time of starting the second and subsequent short circuit operations is reached until the current peak value is reached within the half cycle. The current peak value in the half cycle is controlled to be less than 30%, and the increase amount of the current due to the short-circuit operation is controlled to be less than 40% of the current peak value.

FIG. 11 shows a waveform when the pressure is increased in the high speed rotation range of the dehydration operation in the conventional technique. Since the voltage is increased by about 100 V within 0.05 seconds from the start of the voltage increase, the rotation speed tends to be over the target value, and the phase angle sharply increases and then largely decreases. Although the change in the rotation speed shown in FIG. 11 is difficult to understand, the decrease in the phase angle indicates that the actual rotation speed is larger than the command rotation speed. After that, the phase angle starts to rise again, and it takes 1.3 seconds of adjustment time until it stabilizes at a predetermined advance angle, and so-called hunting occurs. Further, the electric power is regenerated to the inverter power supply side and an overvoltage of about 430 V is generated, and the increase/decrease of the motor current and the start/stop of the boosting are repeated.

FIG. 10 is a view corresponding to FIG. 11 in the present embodiment, and boosts the voltage for 16 seconds to reach the target voltage. As a result, hunting is suppressed without the phase changing rapidly, the motor current gradually increases almost monotonically, and the repetition of the start and stop of boosting does not occur.

As described above, according to the present embodiment, in the drum type washer/dryer, the driving power supply circuit 43 for boosting the driving power supply supplied to the inverter circuit 34 for driving the motor 5 and the boosting by the driving power supply circuit 43 are provided. And a control circuit 42A for controlling the drive of the motor 5 via the inverter circuit 34. Then, the control circuit 42A starts or ends boosting by the drive power supply circuit 43 when the rotation speed of the motor 5 is controlled to match the command rotation speed, and responds to a voltage change of the drive power supply. The time for changing the voltage of the driving power source to the target voltage is set to be later than the time for changing the rotation speed of the motor 5.

As a result, the drive power supply circuit 43 does not repeat the start and stop of boosting without abruptly changing the phase between the voltage and current of the motor 5, so that stable drive control of the motor 5 can be performed. it can. Then, the circuit elements such as the IGBT 35 forming the inverter circuit 34 and the IGBT 48 forming the driving power supply circuit 43 can be prevented from malfunctioning due to the application of the overvoltage. Further, the control circuit 42A determines whether or not to start and stop boosting based on the alternating current of the driving power supply, so that the above determination can be appropriately performed.

(2nd-4th embodiment)
Hereinafter, the same parts as those in the first embodiment will be designated by the same reference numerals, the description thereof will be omitted, and different parts will be described. As shown in FIG. 5, the second to fourth embodiments show variations of parameters for making a determination for executing “boost control in-progress set” and “booster control in-progress” in steps S14 and S16. Is.

In the case of the second embodiment shown in FIG. 12, it is premised that the field weakening control is performed in the high speed rotation region of the drum motor 5, and if the advance angle at that time becomes 20 degrees or more (S13a; YES), step S14 is executed. If the lead angle is less than 20 degrees (S15a; YES), step S16 is executed.

In the case of the third embodiment shown in FIG. 13, it is premised that the field weakening control is performed as in the second embodiment, and if the d-axis current at that time becomes less than −2 A (S13b; YES), step S14 is executed. Then, when it becomes -2A or more (S15b; YES), step S16 is executed.

In the case of the fourth embodiment shown in FIG. 14, if the number of rotations of the drum motor 5 is 1200 rpm or more (S13c; YES), step S14 is executed, and if it is less than 1200 rpm (S15c; YES), step S16 is executed.

As described above, according to the second to fourth embodiments, the control circuit 42A determines whether to start and stop boosting by determining the current or the advance angle when the motor is field-weakening controlled, or the motor 5. Since the determination is made based on the information regarding the rotation speed of, the above determination can be appropriately performed as in the first embodiment.

(Other embodiments)
The control circuits 42A and 42B may be integrated into one control circuit.
The pulse width when the short circuit is performed by the IGBT 48 and the delay time from the zero cross point may be appropriately changed.
The semiconductor switching element is not limited to the IGBT, but a bipolar transistor or MOSFET may be used.
The setting of the threshold values regarding the rotation speed, the voltage, the current, and the electric power, and the setting of the inclination of the buck-boost control are examples, and may be appropriately changed according to the individual design.
Specific values such as the delay time of the first short-circuit pulse, the output interval of each pulse, and the pulse width are also examples, and may be appropriately changed and implemented according to individual designs.
The power factor improving process may be performed as necessary.

It may be applied to a washing machine that does not have a drying function.
Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

In the drawing, 5 is a drum motor, 7 is a drum, 22 is a fan motor, 27 is a compressor, 28 is a comp motor, 34, 38 and 40 are inverter circuits, 42B is a control circuit, 43 is a power supply circuit for driving, and 61 is a drive circuit. Shows the device.

Claims (9)

A booster circuit for boosting the drive power supply supplied to the inverter circuit for driving the motor,
A control circuit that controls boosting by the booster circuit and that controls driving of the motor through the inverter circuit,
The control circuit controls the speed at which the booster is started and the voltage of the driving power supply is changed to a target voltage when the rotation speed of the motor is controlled to match the command rotation speed. A washing machine control device that is slower than the response speed of the calculation performed . A booster circuit for boosting the drive power supply supplied to the inverter circuit for driving the motor,
A control circuit that controls boosting by the booster circuit and that controls driving of the motor through the inverter circuit,
The control circuit, when the rotation speed of the motor is controlled to match the command rotation speed, terminates the boosting, and the control circuit sets the speed at which the voltage of the driving power supply is changed to a target voltage. A washing machine control device that is slower than the response speed of the calculation performed . The control device for a washing machine according to claim 1, wherein the control circuit determines whether or not to start the boosting, based on at least a current of the driving power supply. The control device for a washing machine according to claim 1, wherein the control circuit determines whether or not to start the boosting, based on at least a current or a lead angle when the motor is under field-weakening control. The control device for a washing machine according to claim 1, wherein the control circuit determines whether or not to start the boosting, based on at least information regarding a rotation speed of the motor. 3. The washing machine control device according to claim 2, wherein the control circuit determines whether or not to end the boosting, based on at least the current of the driving power supply. The control device for a washing machine according to claim 2, wherein the control circuit determines whether or not to end the boosting, based on at least a current or a lead angle when the motor is under field-weakening control. The control device for a washing machine according to claim 2, wherein the control circuit determines whether or not to end the boosting, based on at least information regarding a rotation speed of the motor. A motor that generates a rotation driving force for performing a laundry operation,
A drive circuit for driving this motor,
A washing machine comprising: the control device according to any one of claims 1 to 8 which controls driving of the motor via the drive circuit.

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