JP2001113082A - Inverter washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inverter washing machine capable of electrically braking in a stable and positive manner. SOLUTION: This inverter washing machine comprises a DC brushless motor 7; position detecting means 55a-55c for detecting the rotating position of a rotor of the motor 7; a microcomputer 41 for outputting driving signals P1-P6 on the basis of detected position signals Hu, Hv, Hw; and an inverter circuit 35 for supplying three-phase alternating current to the motor 7 by the driving signals. The microcomputer 41 has a built-in memory stored with sine wave data, detects the rotating speed of the motor 7 from the position signals Hu, Hv, Hw and sets the value of a data pointer which is to be an address to the memory, according to the rotating speed at timing obtained from the position signals Hu, Hv, Hw. The microcomputer 41 can thereby perform phase angle control. Upon receiving a stop command, the microcomputer 41 changes the initial value of the data pointer so as to output phase-delayed sine wave data instead of the sine wave data of present rotation control.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter washing machine in which a rotary tub and a stirring body are rotated by a brushless motor.

[0002]

2. Description of the Related Art An inverter washing machine uses a three-phase motor (a three-phase induction motor or a DC brushless motor) instead of a single-phase induction motor to drive a rotary tub, a stirring body, and the like. Therefore, the inverter washing machine has a
Since it is necessary to apply a three-phase alternating current whose phase is shifted by ゜, an inverter means for changing a direct current to an alternating current is provided. Generally, this inverter means is a power transistor or an IGB
A half bridge configuration in which two switching means such as T (Insulated Gate Bipolar Transistor) are connected in series
A three-phase full-wave bridge configuration (full bridge configuration) is provided in combination. Three switching means connected to the + side of the DC power supply input to the inverter means are referred to as an upper arm, and three switching means connected to the-side are referred to as a lower arm. A coil of each phase (U phase, V phase, W phase) of the three-phase motor is connected to a connection point between the upper arm and the lower arm.

The washing machine proposed in Japanese Patent Application Laid-Open No. H10-15278 has been proposed to reduce noise and vibration.
This is a system in which a DC brushless motor directly drives a rotating tank provided inside an outer tank and a stirring body provided inside the rotating tank. The washing machine includes a Hall sensor that detects the rotational position of the rotor and outputs a rotor position signal, and energization signal forming means that forms a substantially sinusoidal energization signal based on the rotor position signal. , The inverter means applies a three-phase AC to the DC brushless motor to drive the DC brushless motor.

[0004]

However, the conventional inverter washing machine has the following problems: (1) In motor control for directly driving the rotating tub or the stirring body, the lid on the top of the washing machine is opened. In such a case, a mechanical brake mechanism is provided to suddenly stop the rotating tank and the stirrer. For this reason, the cost of the washing machine is increased, and extra space is required for disposing the brake mechanism.

(2) Even when a sudden braking is electrically applied, the input voltage of the inverter is not stable due to the mounting accuracy of the Hall sensor and the like, so that the rotary tank and the stirrer cannot be stopped stably.

(3) When the rotating tank or the stirring body is suddenly stopped, the motor magnet is demagnetized by a regenerative current from the motor. If the demagnetization is performed, then the motor will have a low torque.

(4) If the rotating tub is suddenly stopped in the dehydration mode, the lower the number of revolutions at the start of the stop operation, the lower the regenerative voltage, and hence the delay in making the inverter input voltage constant is delayed.
Therefore, the rotating tank cannot be stopped stably.

(5) In the dehydration mode, when the rotary tub is rotating, the power outlet is disconnected, and when it is desired to stop the rotary tub suddenly, a sufficient power supply voltage of the inverter circuit cannot be secured. Therefore, sufficient torque cannot be obtained, and the rotating tank cannot be stopped.

(6) In the dehydration mode, when the motor is rotating at a low speed and the power outlet is unplugged and the operation of the rotating tub is suddenly stopped, the regenerative voltage is small. Voltage cannot be secured. Therefore, the rotating tank cannot be stopped.

(7) In the dehydration mode, if the power outlet is disconnected, the power supply voltage of the control unit cannot be secured.
When the lid lock mechanism is electrically controlled, the lid opens before the rotary tank stops.

The present invention solves the above-mentioned problems, and the first
An object of the present invention is to provide an inverter washing machine capable of performing stable and reliable electric braking. It is a second object of the present invention to provide an inverter washing machine capable of surely stopping the rotary tub when the power outlet is disconnected during dehydration. It is a third object of the present invention to provide an inverter washing machine in which the lid is not opened before the rotating tub stops when the power outlet is disconnected.

[0012]

In order to achieve the above object, the present invention provides a brushless motor having a rotor,
A position detection unit that detects a rotational position of the rotor; and a control unit that drives the brushless motor based on a position signal output from the position detection unit. The control unit stores data by a data pointer that specifies an address. It has a memory in which sine wave-shaped data is stored as the specified data and detects the rotation speed of the brushless motor based on the position signal, and at a predetermined timing obtained from the position signal. An initial value is set in the data pointer based on the detected rotation speed, and thereafter, the data pointer is updated by adding a predetermined value to the value of the data pointer at predetermined intervals, and specified by the updated data pointer. In the inverter washing machine driving the brushless motor based on the data to be performed, Serial control unit is to be changed upon receiving the stop command, the initial value of the data pointer to output a sine wave data delayed in phase instead of the sinusoidal data of the current rotation control.

Further, according to the present invention, a brushless motor capable of driving at least one of a rotating tank provided inside the outer tank and an agitator provided inside the rotating tank; Rectifying means for rectifying a voltage; a capacitor for smoothing a rectified output; a full-bridge type inverter means comprising switching means for inputting the smoothed voltage; and a position detecting means for outputting a position signal indicating a rotor position of the motor. A memory storing sinusoidal data having an electrical angle as an address; and selecting an initial value of an address corresponding to the electrical angle at the inversion timing of the position signal, and thereafter sequentially updating the address at predetermined intervals. A control unit that controls the output motor drive voltage to have a sine wave shape. Instead of the sinusoidal voltage waveform is changed the initial value of the address so as to output the phase of the delayed sinusoidal voltage waveform.

Further, the control unit may delay the position signal inversion with respect to the motor rotation direction so as to reduce the inverter input voltage when the voltage input as a power supply to the inverter circuit is equal to or higher than a predetermined value. The initial value of the data pointer is changed in the direction.

[0015] The control unit may be configured to increase the inverter input voltage when the input voltage of the inverter means is equal to or lower than a predetermined value, so as to increase the inverter input voltage by inverting the position signal in the forward direction relative to the motor rotation direction. Change the initial value of the pointer.

Further, when the input voltage of the inverter means is equal to or higher than a predetermined value, the motor application voltage is adjusted so that the pulse width for driving the switching means corresponding to the sinusoidal voltage is reduced. Control to be higher.

Further, when the input voltage of the inverter means is equal to or less than a predetermined value, the pulse width for driving the switching means corresponding to the sinusoidal voltage is increased by the motor applied voltage so as to increase the inverter input voltage. Control to lower.

The control unit may control the switching means to drive the switching means corresponding to the sinusoidal voltage data when a voltage input to the inverter circuit as a power supply is in a range of not less than a first predetermined value and not more than a second predetermined value. The input voltage is controlled to be within the range by controlling the pulse width of the input voltage.

The control means does not increase the pulse width so that the voltage applied to the motor does not increase when the motor current increases beyond the specified value.

Further, when the rotating tank or the stirring body is suddenly stopped during the spin-drying mode, the control means determines the initial value of the data pointer or the address according to the number of rotations of the motor.

When the power outlet is disconnected during the dehydration mode, power is continuously supplied to the inverter control means using the regenerative voltage from the motor until the rotary tub or the stirrer stops.

In the case where the rotation tank is stopped at a rotation speed of less than the specified rotation speed, the regenerative energy from the motor is small. Turn on all transistors or lower transistors, and stop the rotating tank.

Further, in the present invention, a lock mechanism for locking the lid of the washing machine is provided, and when the power outlet is disconnected while the lid is locked during the spin-drying mode, the rotary tub stops. Until the lid is unlocked using the regenerative voltage from the motor.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an inverter washing machine to which the present invention is applied will be described below with reference to the drawings.
FIG. 1 is a schematic diagram of a direct drive type inverter washing machine of the present embodiment. The washing machine 1 is a one-tub type fully automatic washing machine, and includes a rotary tub 2 also serving as a washing tub and an outer tub 3 inside a main body. The outer tub 3 is suspended from the main body by a suspension unit 4, and the rotary tub 2 is rotatably installed inside the outer tub 3. Further, a stirrer 5 is provided at a position separated from the bottom of the rotary tank 2 by a certain distance.
The main body has a lid 6 for taking in and out laundry. In the lower part of the outer tank 3, the rotation of the DC brushless motor 7 is
And a transmission mechanism 8 for transmitting to the agitator 5.

An operation unit 9, a display unit 10,
A buzzer 11, and a lid sensor 12, which detects opening and closing of the lid 6,
A lock mechanism 18 for controlling opening and closing of the lid is provided,
A water level sensor 13 for detecting a water level in the outer tub 3 is provided beside the outer tub 3. Further, a main control unit 14 composed of a microcomputer for controlling the entire operation of the washing machine 1 is provided below the operation unit 9. Also, a sub-control unit 1 comprising an inverter for supplying a drive signal to the motor 7 and a microcomputer for controlling the rotation of the motor 7 via the inverter.
5 is provided above the inner surface of the side plate 1a. 16 and 17
Are a water supply valve 16 and a drain valve 17 for adjusting the amount of water in the outer tank 3.

FIG. 2 shows a schematic circuit configuration relating to the operation of the washing machine 1. The main control unit 14 stores a program such as an operation content of each step such as washing, rinsing, and dehydration, and a program such as an execution order of the steps (that is, a processing course). And the switching of the transmission destination of the rotation of the motor 7 in the transmission mechanism 8, and controls the motor 7 via the sub-control unit 15.

The main control unit 14 inputs a signal such as a reservation for washing from the operation unit 9. The main control unit 14 displays the progress of the operation on the display unit 10. The main controller 14 sounds the buzzer 11 at the end of washing or the like. The main control unit 14 is the lid sensor 12
, A signal indicating the open / closed state of the lid 6 is input. Main control unit 1
4 inputs a signal indicating the water level in the outer tub 3 from the water level sensor 13.

The main control unit 14 transmits a signal S1 necessary for controlling the rotation of the motor 7 to the sub control unit 15 together with a synchronization clock CLK. Sub-control unit 1 receiving signal S1
5, after reading the signal S1, transmits the signal S2 to the main control unit 14 in synchronization with the clock CLK. The sub-control unit 15 supplies a three-phase current to the motor 7 based on rotor position signals Hu, Hv, and Hw indicating the rotational position of the rotor of the DC brushless motor 7 to drive the motor 7. S3 is a stop signal for stopping the motor.

Next, the configuration of the sub control unit 15 will be described with reference to FIG. In the inverter washing machine 1 of the present embodiment, a three-phase 20-pole DC brushless motor is used as the motor 7. The AC voltage of the commercial power supply 30 is converted into a pulsating DC by the rectifier circuit 31. The rectifier circuit 31 uses a diode bridge.

The DC rectified by the rectifier circuit 31 is smoothed by smoothing capacitors 32a and 32b. Capacitor 3
The + terminal of 2 a is connected to the + terminal of the rectifier circuit 31. The negative terminal of the capacitor 32a and the positive terminal of the capacitor 32b are connected to one terminal of the commercial power supply 30.
The negative terminal of the capacitor 32b is connected to the negative output terminal of the rectifier circuit 31. The DC voltage smoothed by the capacitors 32a and 32b is supplied to the inverter circuit 35.
Inverter circuit 35 converts DC into three-phase AC.

The inverter circuit 35 includes NPN transistors 36a to 36c and 37 as six switching means.
a to 37c have a three-phase full-wave bridge configuration.
The three transistors 36a to 36c connected to the + terminal of the smoothing capacitor 32a are connected to the upper arm and the capacitor 3
The three transistors 37a to 37b connected to the-terminal of
37c is called a lower arm. The diodes 42a to 42c and 43a to 43c are connected in parallel to the six transistors 36a to 36c and 37a to 37c, respectively. Connection points a, b, c of the upper arm transistors 36a to 36c and the lower arm transistors 37a to 37c
Are the phases of the DC brushless motor 7 (U phase, V phase, W phase)
It is connected to the. Lu, Lv and Lw are coils of each phase. The bases of the transistors 36a to 36c and 37a to 37c are connected to the drive circuit 40.

Reference numerals 55a, 55b and 55c denote Hall sensors (position detecting means) for detecting the rotational position of the rotor of the motor 7.
It is. The rotor position signals Hu, Hv, Hw output from the Hall sensors 55a, 55b, 55c are input to the microcomputer 41.

Reference numeral 34a denotes motor current detecting means for detecting a current flowing in the U phase of the motor 7. Reference numeral 34b denotes a motor current detecting means for detecting a current flowing in the V phase of the motor 7. Numeral 34c is a current detecting means for detecting a current flowing in the W phase of the motor 7. Current detecting means 34a, 34b, 34
The signals Du, Dv, and Dw respectively output from c are input to the microcomputer 41.

A microcomputer 41 outputs drive signals P1 to P6 based on the rotor position signals Hu, Hv, Hw. The drive circuit 40 amplifies the signals P1 and P2 and supplies them to the bases of the transistors 36a and 37a, respectively. The drive circuit 40 amplifies the signals P3 and P4 and supplies the amplified signals to the bases of the transistors 36b and 37b. The drive circuit 40 amplifies the signals P5 and P6 and supplies the amplified signals to the bases of the transistors 36c and 37c. 38 is a resistor R1
And the voltage of the connection node of R2 and the inverter circuit 3
5 is an inverter input voltage detecting means for detecting an input voltage of 5 and its detection output is given to the microcomputer 41. The lid lock mechanism 18 is connected to the positive and negative terminals of the rectifier circuit 31 and is controlled by the microcomputer 41.

Therefore, the transistor 36a is turned on / off by the signal P1. The transistor 37a is turned on / off by the signal P2. The transistor 36b is turned on / off by the signal P3. The transistor 37b is turned on / off by the signal P4. The transistor 36c is turned on / off by the signal P5. The transistor 37c is turned on / off by the signal P6.

FIG. 4 shows an example of a drive pattern when the motor drive signal waveform is a sine wave. FIG. 4 is a waveform diagram of signals when the motor 7 is driven constantly at a constant rotation speed. (D1) and (d2) of FIG.
2, when the microcomputer 41 outputs the drive signals P1 and P2, the output voltage to the U-phase is PWM (Pulse Width Modulati) as shown in FIG.
on) (this waveform is substantially equivalent to a sine wave), and the U-phase winding current has a sine wave shape as shown in FIG. At this time, based on the U phase, the inverter circuit 35 has an electrical angle of 240 ° for the V phase and 12 ° for the W phase.
The motor 7 is driven by generating a signal delayed by 0 °.

The microcomputer 41 of the sub control unit 15
In order to generate the drive signals shown in FIGS. 4 (d1) and (d2) from FIG. 4, the microcomputer 41 internally generates a triangular wave 62 having a constant period shown in FIG. And (d1) and (d2) of FIG.
Waveforms are generated. U-phase, V-phase, and W-phase are 2
Since the waveforms are shifted in phase by π / 3 radians, the U phase will be described.

FIG. 10 shows the sine wave data stored in the memory incorporated in the microcomputer 41, the phase of the sine wave, and the value of the data pointer (NEW_DATA) used to specify the address of the memory. FIG. Microcomputer 41
Calculates the drive waveform data 61 from the sine wave data stored in the memory.

The microcomputer 41 calculates 2π radians, which is the phase of one cycle of the sine wave of the drive waveform data 61, by 6
Data pointer (N
EW_DATA). Data pointer (N
EW_DATA) is a digital value and has 65536 values. Incidentally, when the data pointer (NEW_DATA) is 0, the phase is 0 radian. When the data pointer (NEW_DATA) is 32768, the phase is π radians.

In general, the phase angle θ of a sine wave signal having a frequency f at time t is θ = 2πft (radian). The phase update amount Δθ for each cycle Tc (see FIG. 4) of the triangular wave 60 is Δθ = 2πf · Tc (radian).

In FIG. 15, the phase and the data pointer (NEW_
As can be seen from the relationship of (DATA), the phase is set to (6553).
6 / 2π) times the data pointer (NEW_DAT)
A). Therefore, a data pointer (NEW_DATA) for each cycle Tc corresponding to the phase update amount Δθ
Update amount (α_DATA) of Δθ is (65536/2
π) times, α_DATA = 2πf · Tc · (65536 / 2π).

In brief, when the phase update amount Δθ in the cycle Tc of the triangular wave 60 is given, the update amount (α_DAT
A) is obtained by counting the number of phases obtained by dividing the phase 2π radians by 65,536, and is represented by the above equation.

A cycle Tc = 63.5 μs and a frequency f = 6
When a 0 Hz drive signal is output, α_DATA = 4.161 · f = 249. The frequency of the triangular wave 60 is determined by the resolution of a timer used by the microcomputer 41 to measure the time interval of the period Tc and the resolution of PWM.

When the update amount (α_DATA) is determined, the microcomputer 41 updates and holds the new phase angle as NEW_DATA = NEW_DATA + α_DATA as a data pointer (NEW_DATA). In the case of outputting a drive signal having a period Tc = 63.5 μs and a frequency f = 60 Hz, FIG.
The data pointer (NEW_
When the value of (DATA) starts from 0, the value of the data pointer (NEW_DATA) is incremented by 249, which is the value of the update amount (α_DATA), for each cycle Tc of the triangular wave 60. Change.

Next, a data pointer (NEW_DATA)
The amplitude value of the sine wave corresponding to the value of is calculated. The memory is previously stored in the memory as sine wave table data such that 2π radians of the phase become 512 bytes, and (1 + 2/3) ×
854 basic data for 2π radians are stored. These basic data include a sign bit. 2
Since π radians correspond to 512 table data (and thus have 512 addresses), the value of NEW_DATA is set to 128.
The sine wave data is read out from the memory by designating the number obtained by dividing by 2 as an address (the address corresponding to 2π radians is 65536 ÷ 128 = 512).
A value obtained by multiplying the result by the modulation factor β is embedded as data 61 in an actual comparison buffer. Then, a comparator built in the microcomputer 41 has a sine wave data 61 shown in FIG. 4C and a data 62 embedded in a triangular buffer.
And outputs the comparison result. As a result, drive signals P1 and P2 shown in (d1) and (d2) of FIG. 4 are generated.

An AC current having a sine waveform as shown in FIG. 4 (f) flows through the U-phase winding of the DC brushless motor 7 from the inverter circuit 35 receiving the drive signals P1 and P2. A drive signal is similarly generated for the V phase and the W phase. As a result, the DC brushless motor 7 rotates. The rotor position signals output from the three Hall sensors 55a, 55b and 55c are attached to the DC brushless motor 7 as shown in FIG. The induced voltage of each phase of the DC brushless motor 7 is as shown in FIG.

FIG. 11 is a waveform diagram in which some signals are extracted to schematically show the operation of the microcomputer 41. Time changes of the rotor position signals Hu and Hv and the U-phase drive waveform data 61 are shown. At the falling timing ta of the rotor position signal Hu, the microcomputer 41 initializes the data pointer (NEW_DATA) to 0. Data pointer (NEW_DATA)
Is 0, data having an amplitude of 0 is obtained from the memory.

The microcomputer 41 detects the number of rotations of the motor using a speed detection timer, and determines the frequency of the drive waveform data 61 based on the detected number of rotations. Thereby, as described above, the update amount (α_DA
TA) can be calculated. Thereafter, as shown in a partially enlarged manner in FIG. 11, the microcomputer 41 uses the timer to update the data pointer (NEW_DATA) with the update amount (α_DA) at the timing t1 when the cycle Tc of the triangular wave 60 has elapsed.
TA) and the data pointer (NEW_DATA)
To update. As a result, data corresponding to the data pointer (NEW_DATA) is obtained from the memory, and is referred to as drive waveform data 61. This drive waveform data 61 is shown in FIG.
As shown in (c), the microcomputer 41 compares the waveform with the triangular wave 62, and the comparison result is a PWM-processed waveform. This PWM-processed waveform is supplied to the microcomputer 4
The drive signals P1 and P2 output from the signal No. 1 are obtained.

Thereafter, the microcomputer 41 uses the timer to update the data pointer (NEW_DATA) to the update amount (α_DAT) at the timing t2 when the period Tc has elapsed.
A) is added to update the data pointer (NEW_DATA). As a result, data corresponding to the data pointer is obtained from the memory, and is referred to as drive waveform data 61. Then, the update amount (α_DATA) is added to the data pointer (NEW_DATA) for each cycle Tc using a timer, and the data pointer (NEW_DATA) is updated by adding the data pointer (NEW_DATA). As a result, the drive waveform data 61 is updated every cycle Tc.

After that, when the rotor of the motor 7 rotates, the rise of the rotor position signal Hv is input to the microcomputer 41. Microcomputer 4
1 initializes the data pointer (NEW_DATA) at the timing tb when the rise of the rotor position signal Hv is input, and the initial value is 10922 (2AAA'H) in the U phase.
Initialize with

As described above, the microcomputer 41 initializes the data pointer (NEW_DATA) at the timing when the rotor position signals Hu, Hv, Hw are inverted, and updates the data pointer (NEW_DATA) from the rotation speed detected by using the speed detection timer.
_DATA). Thereafter, the update amount (α_DAT) is added to the data pointer (NEW_DATA) every cycle Tc.
A) is added to update the data pointer (NEW_DATA), and drive waveform data 61 is created.

The microcomputer 41 detects the number of revolutions using the speed detection timer, and determines the frequency of the drive waveform data 61 based on the detected number of revolutions. Thereby, the update amount (α_DATA) is calculated. Then, the update amount (α_DATA) is added to the data pointer (NEW_DATA) every cycle Tc using a timer.
To update the data pointer (NEW_DATA). As a result, the drive waveform data 61 for each cycle Tc
Will be updated.

Next, a control example of the motor 7 will be described. FIG.
FIG. 6 is a diagram showing patterns of position signals Hu, Hv, Hw, a starting pattern of the motor 7 and an operation mode when the sub-control unit 15 rotates the DC brushless motor 7 in the normal rotation direction. FIG. 6 is a diagram showing the patterns of the position signals Hu, Hv, and Hw when the sub-control unit 15 rotates the DC brushless motor 7 in the reverse direction, and the starting and operation modes of the motor 7. FIG. 5 shows a waveform when the rotor is rotating. First, an operation when the DC brushless motor 7 is started in the normal rotation direction will be described.

The Hall sensors 55a, 55b and 55c can detect the rotor position even when the rotor is stopped. When starting, the microcomputer 41 first checks the rotor position from the rotor position signals Hu, Hv, Hw to determine a start pattern. There are six types of starting patterns that can be identified from the rotor position signals Hu, Hv, Hw.

For example, when the rotor position signal Hu is at a high level,
The rotor position signal Hv is at a low level and the rotor position signal Hw is
Is pattern 1 when is at the low level. At this time, the sub-control unit 15 pays attention to the V phase, and 655 corresponding to the data pointer (NEW_DATA) for the phase of the V phase of 30 °.
36 × 30/360 = 1555′H is fetched from the embedded table data at the address. At this time,
The operation mode is mode a, and the U phase is 120
The ゜ and W phases read data from the data pointer (NEW_DATA) delayed by 240 ° from the V phase. At this time, an appropriate initial value of the update amount (α_DATA) is obtained from an experimental value. Further, a speed detection timer for detecting the number of rotations of the motor 7 is started.

Thus, the sub-control unit 15 generates a drive signal and the rotor starts rotating. The rising edge 53c of the rotor position signal Hw, which is a changeover of the rotor position signals Hu, Hv and Hw, comes due to the rotation of the rotor. At this time, the data pointer (NEW_DATA) assumes the data pointer (NEW_D
When ATA) reaches 1555'H.times.2 = 2AAA'H, the data is not updated until the rising edge 53c of the rotor position signal Hw is detected, and the same data is waited. Then, when the rising edge 53c of the rotor position signal Hw actually comes, the updating of the data pointer (NEW_DATA) is restarted, and the speed detection timer is once reset.

Further, the falling edge 53d of the rotor position signal Hu comes due to the rotation of the rotor. At this time, the operation mode is switched to the mode b and attention is paid to the U phase. Also at this time, the falling edge 53d of the rotor position signal Hu
Up to V phase data pointer (NEW_DATA) is 2A
Wait at AA'H. Then, when the edge 53d comes, the data pointer (NEW_DATA) which is delayed by 240 ° with respect to the U phase and 120 ° with respect to the U phase for the W phase is based on the U phase (the initial value of the data pointer is 0). ) To read data. In this manner, the six edges 5 are sequentially set.
Data correction is performed in 3a to 53f. Further, since the number of rotations is obtained by the value of the speed detection timer, the update amount (α_DATA) is changed so as to follow the speed change as needed.

Thus, the U-phase drive waveform data 56a
Is sinusoidal, and the edge 53 of the rotor position signal Hu
It becomes zero at a and 53d. V-phase drive waveform data 56b
Is sinusoidal, and the edge 53 of the rotor position signal Hv
It becomes zero at b and 53e. W-phase drive waveform data 56c
Is a sine wave, and the edge 53 of the rotor position signal Hw
It becomes zero at c and 53f.

When the DC brushless motor 7 is rotated in the reverse direction, six types of rotor position patterns 6 to 9, a and b can be identified from the rotor position signal as shown in FIG.
After confirming the location, start up. The case where the rotor position signal Hu is at a high level, the rotor position signal Hv is at a low level, and the rotor position signal Hw is at a high level will be described as an example. At this time, it is the rotor position pattern 6, and the sub-control unit 15 pays attention to the U phase, and corresponds to the data pointer (NEW_DATA) 155 corresponding to the U phase of 30 °.
5′H is embedded and data is taken in from the table data. At this time, the operation mode is set to mode d, and data is read from the data pointer (NEW_DATA) which is 120 ° behind the U phase and 240 ° behind the U phase for the V phase. At this time, the initial value of the update amount (α_DATA) is obtained from an experimental value. In addition, a speed detection timer for detecting the number of rotations of the motor 7 at the time of startup is started.

The rotation of the rotor causes the rotor position signal Hu,
A falling edge 63b of the rotor position signal Hw, which is a switch between Hv and Hw, comes. At this time, the data pointer (NEW_DATA) assumes 2AAA, assuming that the rotor is delayed.
'Holding on the same data without updating from H. Then, the rising edge 63 of the rotor position signal Hw is actually
When b comes, the update of the data pointer (NEW_DATA) is restarted and the speed detection timer is reset again.
Next, a rising edge 63c of the signal Hv comes. At this time, the operation mode is switched to the mode e, and attention is paid to the V phase. The U-phase is a data pointer (NEW_DAT) delayed by 120 ° with respect to the V-phase,
Read data from A).

In this manner, the six edges 63a to 63
The data is corrected at 3f. Further, the update amount (α_DATA) is changed so as to follow the speed change as needed according to the value of the speed detection timer of the motor 7. As a result, sine-wave data 66a is generated in the U-phase, sine-wave data 66b is generated in the V-phase, and sine-wave data 66c is generated in the W-phase.
Is generated.

In particular, edges 63a and 63d of position signal Hu
At this time, the data 66a becomes zero. Position signal H
The data 66b at the timing of the edges 63b and 63e of v
Becomes zero. The data 66c becomes zero at the timing of the edges 63c and 63f of the position signal Hw. Also, edges 63a to 63f obtained from the position signals Hu, Hv, Hw
Data pointer (NEW_DA) at all timings
TA) is set.

<Embodiment 1> Next, a control operation when a command to stop the rotary tank is issued while the motor is rotating forward will be described with reference to FIG. When the motor is rotating, the update amount (α_DATA) is changed to an update amount according to the rotation speed of the motor as described above.
Now, when a command to stop the rotary tub 2 is issued from the main control unit 14 to the sub-control unit 15, the sub-control unit 15
As shown in FIG. 7, for the V-phase waveform 56 shown in FIG.
Sine wave data 51 delayed by a predetermined phase, for example, 180 °
Is output.

At this time, the W phase is 120 ° with respect to the V phase,
The U-phase outputs a sine wave using the initial value of the data address advanced by 240 °. Thereafter, while the initial value is updated at the reversal timing of the Hall sensor, data that is delayed by 180 ° is output to control the rotary tank 2 to stop.

<Embodiment 2> FIG. 8 shows that when the inverter input voltage is higher than a predetermined value, the switching transistor of the inverter circuit may exceed the withstand voltage of the switching transistor and may be destroyed. To lower the input voltage. That is, when the sub-control unit 15 determines that the input voltage detected by the inverter input voltage detecting means 38 is equal to or higher than the predetermined value, the current rotor position is set to the pattern 3
, The initial value of the address corresponding to the electrical angle is set to FDDCH at the rising edge 53e of Hv, which is the next reversal timing of the Hall sensor, and the output waveform is changed to a waveform delayed by 3 ° like 60b. Control so that At this time, the W phase is 120 ° with respect to the V phase, and the U phase is 2 °.
The voltage is controlled in a sine wave shape using the initial value of the data address delayed by 40 °. Then, if the inverter input voltage is still equal to or higher than the predetermined value, control to delay the initial value at any time with the inversion timing of the Hall sensor is performed until the inverter input voltage becomes equal to or lower than the predetermined value.

<Embodiment 3> On the other hand, if the input voltage detected by the inverter input voltage detecting means 38 is lower than a predetermined value, the power supply voltage of the inverter circuit 35 becomes insufficient and the torque decreases. Control is performed as follows to increase the input voltage. That is, when the sub-control unit 15 determines that the input voltage is equal to or lower than the predetermined value, assuming that the current rotor position is in the pattern 3, at the rising edge 53e of Hv which is the next reversal timing of the Hall sensor,
For the V phase, the initial value of the address corresponding to the electrical angle is 2
22H, and the output waveform is controlled so as to be a waveform advanced by 3 ° as shown by 61b in FIG. At this time, the voltage is controlled in a sinusoidal manner using the initial value of the data address of the W phase delayed by 120 ° with respect to the V phase, and the U phase is delayed by 240 ° with respect to the V phase. And
If the inverter input voltage is still below the predetermined value,
The control to advance the initial value at the inversion timing of the Hall sensor as needed is performed until the inverter input voltage becomes a predetermined value or more.

Embodiment 4 Embodiment 4 is another control method when the inverter input voltage is equal to or higher than a predetermined value. When the sub-control unit 15 determines that the input voltage detected by the inverter input voltage detection means 38 is equal to or higher than a predetermined value,
The sub-control unit 15 controls the pulse width of the sine wave data (pulse width as shown in FIG. 4E) at regular intervals so as to increase the voltage applied to the motor. In other words, the positive pulse width is evenly increased at the positive peak portion of the sine wave, and the negative pulse width is evenly increased at the negative peak portion to increase the positive current flowing from the capacitors 32a and 32b to the motor. Reduce the inverter input voltage.

<Embodiment 5> Embodiment 5 is a control in the case where the inverter input voltage is equal to or lower than a predetermined value. When the sub-control unit 15 determines that the input voltage detected by the inverter input voltage detection means 38 is equal to or less than a predetermined value, the sub-control unit 15 applies the pulse width of the sinusoidal data to the motor at regular intervals. Is controlled so that the applied voltage is low. In other words, the positive pulse width is uniformly reduced at the positive peak portion of the sine wave, and the negative pulse width is uniformly reduced at the negative peak portion to reduce the positive current flowing from the capacitors 32a and 32b to the motor. Increase the inverter input voltage.

<Embodiment 6> This embodiment will be described with reference to FIG. In FIG. 9, the first, second,
Third prescribed values of 380V, 400V and 420V are set in advance. In the case where the inverter input voltage E changes as shown in the figure, in the zone 81 of 380 V or less, the waveform is such that the initial value of the address corresponding to the electrical angle is advanced at the inversion timing of the Hall sensor as in the third embodiment. Set and control. In the zone 82 of 380V to 420V, if the second specified value is 400V or more, the applied voltage to the motor is increased, and if it is 400V or less, the applied voltage to the motor is reduced, and the inverter input voltage is reduced to the second specified value of 400V. Control so that

In the zone 8 having the third specified value of 420 V or more,
In the third embodiment, the waveform is set and controlled so that the initial value of the address corresponding to the electrical angle is delayed at the inversion timing of the Hall sensor as in the second embodiment. In the case of the zone 84 which does not exceed the range of 380 V to 420 V, the motor applied voltage is increased if the voltage is 400 V or more centering on the second specified value 400 V, and the motor applied voltage is decreased if the voltage is 400 V or less. The inverter input voltage is controlled to be constant at 400V.

<Embodiment 7> In the present embodiment, when the input voltage detected by the inverter input voltage detecting means 38 is equal to or less than a predetermined value, the pulse width of the sine wave data is evenly applied to the motor. Control to be higher,
When the current value detected by the motor current detecting means 38 is equal to or greater than a specified value, the current value is prioritized, and control is performed so as to limit the pulse width so that the motor current does not exceed the specified value.

<Embodiment 8> In this embodiment, the time from the reversal timing of the position signal of the Hall sensor to the reversal timing is measured and the number of rotations is detected, and the sub control unit 15 operates during the "dehydration mode". Monitor the above rotation speed,
At this time, it is assumed that there is a command from the main control unit 14 to stop the rotary tank 2 to the sub control unit 15. At that time, the sub control unit 1
5 detects the number of revolutions when stopping the rotating tank 2 when changing the inverter output so that the rotating tank 2 stops, and based on the data obtained from the experimental values, the inverter input voltage is set to a certain constant voltage. The operation shifts to the operation of stopping the rotary tank 2 with the data pointer having such a phase angle as the initial value.

<Embodiment 9> In this embodiment, when the power outlet is disconnected during the "dehydration mode", the regenerative energy from the motor is used, for example, when the control shifts to stopping the rotary tub 2. By controlling the inverter input voltage to be constant as in the sixth embodiment, the rotating tub 2 can be stopped even if the power outlet is disconnected.

<Embodiment 10> When the power outlet is disconnected during the "dehydration mode", for example, when the sub control unit determines that the rotation speed is 100 rpm or less by the motor rotation speed detecting means of the embodiment 8, the sub control is performed. The unit 15 includes transistors 36a, 3a on the upper side of the full-bridge type inverter means 35.
6b, 36c or lower transistors 37a, 37
b and 37c are all turned on. By this operation, the sub control unit 15 continues this operation until the power supply voltage input via the smoothing capacitors 32a and 32b drops. The motor is stopped by the self-regenerative voltage.

<Embodiment 11> In this embodiment, the lid lock mechanism 14 is controlled in the sub-control unit 15, and the lid lock mechanism 14 is supplied with a power supply voltage from the input side of the inverter means 35. The sub-control unit 15 controls so as not to open the cover 6 until this step is completed in the “dehydration mode” (the rotary tub stops).
When the power outlet is disconnected during the operation, the sub-control unit 15 that controls the inverter input voltage to be constant as in the ninth embodiment so as to stop the rotary tank 2 until the rotary tank 2 is determined to be stopped. The above control is performed with the lid locked. As a result, the rotary tank 2 stops, and the lid 6
Is unlocked.

In the above embodiment, the direct drive type inverter washing machine in which the torque generated by the DC brushless motor 7 is directly transmitted to the rotary tub 2 and the agitator 5 has been described. The present invention can be similarly applied to an inverter washing machine that transmits the rotation to the rotary tub 2 and the stirring body 5 via a belt, a pulley, and a gear.

[0077]

As described above, according to the first and second aspects of the present invention, a mechanical brake mechanism is provided by controlling a voltage applied to the motor to apply a sudden brake to a rotary tank or the like driven by the motor. It can be abolished and cost merit can be obtained.

According to the third and fourth aspects of the present invention, the drive circuit of the inverter can be protected by controlling the input voltage of the inverter not to exceed a predetermined value.

Further, according to the fifth and sixth aspects of the present invention, by controlling the input voltage of the inverter not to fall below a predetermined value, even if the power outlet is disconnected during braking, the rotating tank or the stirrer is driven by the voltage generated by the motor. You can continue to brake until you stop.

According to the present invention, the inverter input voltage can be controlled and the rotating tank and the stirrer can be stably maintained even if the position of a Hall sensor or the like that generates a rotational position signal of the rotor is displaced. Can be stopped.

According to the eleventh and twelfth aspects of the present invention, the inverter input voltage can be controlled to be constant, and the rotary tank can be stopped stably.

According to the thirteenth aspect of the present invention, even if the current of the motor increases, the current applied to the motor can be controlled before the current value causing demagnetization, and the motor is not demagnetized.

According to the fourteenth aspect of the present invention, since the regenerative energy from the motor differs for each rotation speed, the initial value of the data pointer corresponding to the phase angle is determined for each rotation speed based on data obtained from experimental values. This makes it possible to stably stop the rotary tank and the stirrer.

According to the fifteenth aspect of the present invention, it is possible to stop the rotary tub even if the power outlet is disconnected while the rotary tub is rotating.

Further, according to the sixteenth aspect of the present invention, it is possible to stop the rotary tub even if the outlet is disconnected when the rotary tub is rotating at a low speed.

According to the seventeenth aspect of the present invention, when the power outlet is disconnected during the spin-drying mode, the lid is not unlocked until the rotating tub is stopped by the regenerative voltage from the motor, thereby providing a safer washing machine. Can be provided.

[Brief description of the drawings]

FIG. 1 is an internal schematic configuration diagram of an entire washing machine according to an embodiment of the present invention.

FIG. 2 is a block diagram of the washing machine.

FIG. 3 is a block diagram of a sub control unit of the washing machine.

FIG. 4 is an output waveform diagram corresponding to a position signal of a hall sensor of the washing machine.

FIG. 5 is a diagram showing a pattern of a position signal in the normal rotation direction of the washing machine, a start pattern of the motor, and an operation mode.

FIG. 6 is a diagram showing a pattern of a position signal in the reverse direction of the washing machine, a start pattern of the motor, and an operation mode.

FIG. 7 is a diagram showing a control operation of stopping the washing machine.

FIG. 8 is a diagram showing control operations when the inverter input voltage of the washing machine is lowered and raised.

FIG. 9 is a diagram showing an inverter input voltage control mode of the washing machine.

FIG. 10 is a view showing sine wave data stored in a microcomputer of the washing machine, and a relationship between a phase of the sine wave and a data pointer.

FIG. 11 is a view schematically showing the operation of the washing machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Inverter washing machine 2 Rotating tub 3 Outer tub 4 Suspension part 5 Stirrer 6 Lid 7 DC brushless motor 8 Transmission mechanism 9 Operation part 10 Display part 11 Buzzer 12 Lid sensor 13 Water level sensor 14 Main control part 15 Sub-control part 16 Water supply valve 17 drain valve 18 lid lock mechanism 30 commercial power supply 31 rectifier circuit 32a, 32b smoothing capacitor 34a-34c current detecting means 35 inverter circuit 36a-36c, 37a-37c NPN transistor 38 inverter input voltage detecting means 40 drive circuit 41 micro Computers 42a to 42c, 43a to 43c Diodes 55a, 55b, 55c Hall sensors (position detecting means)

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 3B155 AA10 BA01 BB15 DA09 HB10 HC04 HC05 HC07 KA34 KA36 KB11 LA02 LA11 LB24 LC13 LC15 MA01 MA05 MA06 MA07 MA09 5H560 AA10 BB04 BB12 DA02 DA19 DC12 DC13 EB01 EC01 EC10 GG04 HBSS SS UA02

Claims (17)

[Claims] A brushless motor having a rotor; a position detecting means for detecting a rotational position of the rotor; and a control unit for driving the brushless motor based on a position signal output from the position detecting means. The control unit has a memory in which data is specified by a data pointer that specifies an address, and a memory in which sine-wave-shaped data is stored as the specified data, and detects a rotation speed of the brushless motor based on the position signal. At the same time, at a predetermined timing obtained from the position signal, an initial value is set in the data pointer based on the detected number of revolutions, and thereafter, a predetermined value is added to the value of the data pointer at predetermined intervals, and the data pointer is added. And updating the brush based on the data identified by the updated data pointer. In the inverter washing machine that drives the motor, the control unit changes the initial value of the data pointer so as to output sine wave data with a delayed phase instead of the sine wave data of the current rotation control when receiving the stop command. Inverter washing machine characterized by performing. 2. A brushless motor capable of driving at least one of a rotating tank provided inside the outer tank and a stirring member provided inside the rotating tank, and rectifying an AC voltage from a commercial power supply. Rectifying means, a capacitor for smoothing a rectified output, a full-bridge type inverter means comprising switching means for inputting a smoothed voltage, a position detecting means for outputting a position signal indicating a rotor position of the motor, and an electrical angle A memory that stores sine-wave-shaped data having an address as an address, and a motor that selects an initial value of an address corresponding to the electrical angle at an inversion timing of the position signal, and then sequentially updates and outputs the address at predetermined intervals. A control unit for controlling the drive voltage to have a sinusoidal waveform, wherein the control unit receives a stop command and receives a sinusoidal voltage for the current rotation control. Inverter washing machine and changes the initial value of the address so as to output the phase of the delayed sinusoidal voltage waveform instead of waveform. A brushless motor driven and controlled via an inverter circuit comprising switching means; a position detecting means for detecting a rotor rotation position of the motor; and a brushless motor based on a position signal output from the position detecting means. A control unit for driving a brushless motor, the control unit includes a memory in which data is specified by a data pointer that specifies an address and a memory in which sine wave-shaped data is stored as the specified data, The number of rotations of the brushless motor is detected based on the number of rotations, and an initial value is set in the data pointer based on the number of rotations detected at a predetermined timing obtained from the position signal. The data pointer is updated by adding a predetermined value to the value of In an inverter washing machine that drives the brushless motor based on data specified by a pointer, the control unit reduces the inverter input voltage when a voltage input as a power supply to the inverter circuit is equal to or higher than a predetermined value. And changing an initial value of the data pointer in a direction delayed with respect to a motor rotation direction at the inversion timing of the position signal. 4. A brushless motor capable of driving at least one of a rotating tank provided inside the outer tank and a stirring member provided inside the rotating tank, and rectifying an AC voltage from a commercial power supply. Rectifying means, a capacitor for smoothing a rectified output, a full-bridge type inverter means comprising switching means for inputting a smoothed voltage, a position detecting means for outputting a position signal indicating a rotor position of the motor, and an electrical angle A memory that stores sine-wave-shaped data having an address as an address, and a motor that selects an initial value of an address corresponding to the electrical angle at an inversion timing of the position signal, and then sequentially updates and outputs the address at predetermined intervals. A control unit for controlling the drive voltage to have a sinusoidal waveform, wherein the control unit performs control when the input voltage of the inverter means is equal to or higher than a predetermined value. The inverter washing machine and changes the initial value of the data pointer to the delay direction with respect to the rotating direction of the motor at the inversion timing of the position signal so as to lower its inverter input voltage. 5. A brushless motor which is driven and controlled via an inverter circuit comprising switching means, position detecting means for detecting a rotor rotation position of said motor, and said brushless motor based on a position signal output from said position detecting means. A control unit for driving a brushless motor, the control unit includes a memory in which data is specified by a data pointer that specifies an address and a memory in which sine wave-shaped data is stored as the specified data, The number of rotations of the brushless motor is detected based on the number of rotations, and an initial value is set in the data pointer based on the number of rotations detected at a predetermined timing obtained from the position signal. The data pointer is updated by adding a predetermined value to the value of In an inverter washing machine that drives the brushless motor based on data specified by a pointer, the control unit increases the inverter input voltage when a voltage input as a power supply to the inverter circuit is equal to or lower than a predetermined value. And changing an initial value of the data pointer in an advancing direction with respect to a motor rotation direction at an inversion timing of the position signal. 6. A brushless motor capable of driving at least one of a rotating tank provided inside the outer tank and a stirring member provided inside the rotating tank, and rectifying an AC voltage from a commercial power supply. Rectifying means, a capacitor for smoothing a rectified output, a full-bridge type inverter means comprising switching means for inputting a smoothed voltage, a position detecting means for outputting a position signal indicating a rotor position of the motor, and an electrical angle A memory that stores sine-wave-shaped data having an address as an address, and a motor that selects an initial value of an address corresponding to the electrical angle at an inversion timing of the position signal, and then sequentially updates and outputs the address at predetermined intervals. A control unit for controlling the drive voltage to have a sinusoidal waveform, wherein the control unit performs control when the input voltage of the inverter means is equal to or less than a predetermined value. The inverter washing machine and changes the initial value of the data pointer along the advancing direction relative to the rotating direction of the motor at the inversion timing of the position signal so as to increase the inverter input voltage. 7. A brushless motor driven and controlled via an inverter circuit comprising switching means controlled by a pulse, a position detecting means for detecting a rotor rotational position of the motor, and a position outputted from the position detecting means. A control unit for driving the brushless motor based on a signal, wherein the control unit has a memory in which data is specified by a data pointer that specifies an address and sine wave-shaped data is stored as the specified data. Detecting the rotation speed of the brushless motor based on the position signal, setting an initial value in the data pointer based on the detected rotation speed at a predetermined timing obtained from the position signal, The data pointer is updated by adding a predetermined value to the value of the data pointer every time. An inverter washing machine that drives the brushless motor based on data specified by the updated data pointer, wherein the control unit is configured to control the inverter when a voltage input as a power supply to the inverter circuit is equal to or higher than a predetermined value. An inverter washing machine wherein the pulse width for driving the switching means is controlled so as to increase the voltage applied to the motor so as to decrease the input voltage. 8. A brushless motor capable of driving at least one of a rotary tub provided inside the outer tub and a stirring body provided inside the rotary tub, and rectifying an AC voltage from a commercial power supply. Rectifying means, a capacitor for smoothing a rectified output, a full-bridge type inverter means comprising switching means for inputting a smoothed voltage, a position detecting means for outputting a position signal indicating a rotor position of the motor, and an electrical angle A memory that stores sine-wave-shaped data having an address as an address, and a motor that selects an initial value of an address corresponding to the electrical angle at an inversion timing of the position signal, and then sequentially updates and outputs the address at predetermined intervals. A control unit for controlling the drive voltage to have a sinusoidal waveform, wherein the control unit performs control when the input voltage of the inverter means is equal to or higher than a predetermined value. The inverter washing machine, characterized in that the to decrease the inverter input voltage, controls the pulse width of the switching means for driving so that the motor applied voltage is increased. 9. A brushless motor which is driven and controlled via an inverter circuit comprising switching means, a position detecting means for detecting a rotor rotation position of said motor, and a brushless motor based on a position signal output from said position detecting means. A control unit for driving a brushless motor, the control unit includes a memory in which data is specified by a data pointer that specifies an address and a memory in which sine wave-shaped data is stored as the specified data, The number of rotations of the brushless motor is detected based on the number of rotations, and an initial value is set in the data pointer based on the number of rotations detected at a predetermined timing obtained from the position signal. The data pointer is updated by adding a predetermined value to the value of In an inverter washing machine that drives the brushless motor based on data specified by a pointer, the control unit increases the inverter input voltage when a voltage input as a power supply to the inverter circuit is equal to or lower than a predetermined value. And controlling the pulse width for driving the switching means so that the voltage applied to the motor is reduced. 10. A brushless motor capable of driving at least one of a rotating tank provided inside an outer tank and a stirring member provided inside the rotating tank, and rectifying an AC voltage from a commercial power supply. Rectifying means, a capacitor for smoothing a rectified output, a full-bridge type inverter means comprising switching means for inputting a smoothed voltage, a position detecting means for outputting a position signal indicating a rotor position of the motor, and an electrical angle A memory that stores sine-wave-shaped data having an address as an address, and a motor that selects an initial value of an address corresponding to the electrical angle at an inversion timing of the position signal, and then sequentially updates and outputs the address at predetermined intervals. A control unit that controls the drive voltage to have a sine wave shape, wherein the control unit is configured such that an input voltage of the inverter means is equal to or less than a predetermined value. The case, the inverter washing machine, characterized in that the to increase the inverter input voltage, the pulse width of the switching means for driving the motor applied voltage is controlled to be lower. 11. A brushless motor which is driven and controlled via an inverter circuit comprising switching means, position detecting means for detecting a rotational position of a rotor of the motor, and a brushless motor based on a position signal output from the position detecting means. A control unit for driving a brushless motor, wherein the control unit includes a memory in which data is specified by a data pointer that specifies an address and a sine wave-shaped data is stored as the specified data, and the position signal includes The number of rotations of the brushless motor is detected based on the number of rotations, and an initial value is set in the data pointer based on the number of rotations detected at a predetermined timing obtained from the position signal. Update the data pointer by adding a predetermined value to the value of
In the inverter washing machine that drives the brushless motor based on the data specified by the updated data pointer, the control unit may be configured to perform a second operation when a voltage input to the inverter circuit as a power supply is equal to or more than a first predetermined value. An inverter washing machine which operates so as to maintain the input voltage within the range by controlling a pulse width for driving the switching means within a range equal to or less than a predetermined value. 12. A brushless motor capable of driving at least one of a rotating tank provided inside the outer tank and a stirring member provided inside the rotating tank, and rectifying an AC voltage from a commercial power supply. Rectifying means, a capacitor for smoothing the rectified output, a full-bridge type inverter means comprising switching means for inputting the smoothed voltage, a position detecting means for outputting a position signal indicating a rotor position of the motor, and an electric angle. A memory that stores sine-wave-shaped data as an address; and a motor drive that selects an initial value of an address corresponding to the electrical angle at an inversion timing of the position signal, and then sequentially updates and outputs the address at predetermined intervals. And a control unit for controlling the voltage to have a sinusoidal waveform, wherein the control unit is configured such that the input voltage of the inverter circuit is equal to or greater than a first predetermined value Inverter washing machine in the range of less than the second predetermined value, characterized in that work to hold the input voltage within the range by controlling the pulse width for controlling the switching means. 13. A current detecting means for detecting a motor current flowing through the motor, wherein the control means controls the pulse so that the applied voltage to the motor does not increase when the motor current increases beyond a specified value. The inverter washing machine according to any one of claims 7 to 12, wherein the width is not increased. 14. The apparatus according to claim 11, wherein the control means determines an initial value of the data pointer or the address according to the number of rotations of the motor when the rotating tub is suddenly stopped during the spin-drying mode. Inverter washing machine as described. 15. The power supply to the inverter control means using the regenerative voltage from the motor until the rotary tub stops when the power outlet is disconnected during the dehydration mode. 13. The inverter washing machine according to claim 12. 16. When the rotating tank is stopped at a rotation speed of less than a predetermined rotation speed, the regenerative energy from the motor is small. The inverter washing machine according to claim 14, wherein all of the transistors or lower transistors are turned on to stop the rotating tub. 17. A lock mechanism for locking a lid of a washing machine is provided, and when the power outlet is disconnected while the lid is locked in the spin-drying mode, the motor is operated until the rotary tub stops. An inverter washing machine characterized in that the lid is not unlocked by using the regenerative voltage of the inverter.