JP4857779B2 - Power generator and clothing processing apparatus using the same - Google Patents

Description

  [Technical Field] The present invention relates to a power generation device used for a general household or commercial washing machine, a clothes dryer, a clothes dryer such as a laundry dryer, a vacuum cleaner, or the like, and a clothing processor using the power generator. It is about.

  Conventionally, this type of power generation device detects motor current for each PWM carrier, changes A / D, and determines and controls Id and Iq (see, for example, Patent Document 1). FIG. 8 is a control block diagram of the conventional power generation device described in Patent Document 1. In FIG.

  In FIG. 8, in the state that has shifted to the steady state after startup, the three-phase motor 26 is driven by the current supply from the inverter 59, and the current detection means 76 configured by a resistor detects the current of each phase. Through the A / D converter 77, the UVW / αβ converter 78 performs the calculation of Formula 1.

Further, while taking in the value of the electrical angle θ, the αβ / dq conversion unit 68 performs the calculation of Equation 2 to obtain the values of Id and Iq.

  The calculated values of Id and Iq are obtained by amplifying an error between the set values Idref and Iqref output from the speed control means 65 by the current PI control unit (d) 69d and the current PI control unit (q) 69q, and Vd And Vq are determined by the dq / αβ conversion unit 70 together with the electrical rotation angle θ, Vα and Vβ are set, and a voltage command for each phase is set by the αβ / UVW conversion unit 71. The switching elements 75 (a to f) of the inverter circuit 59 are subjected to on / off control.

The timing at which the A / D converter 77 performs the A / D conversion is the time point when the counter value “0” of the 16 kHz triangular wave (carrier wave), which is a constant frequency in the PWM forming unit 74, is switched. This is a period during which the element (IGBT) is on.
JP 2003-169993 A

  However, in the conventional configuration, since trigonometric functions such as sin and cos are necessary, the calculation is complicated, and Equation 1 is a constant because it is a constant. However, in Equation 2, θ changes to various values. However, since it is necessary to perform the conversion shown in Equation 2 in the UVW / αβ conversion unit, the calculation of cos θ and sin θ, that is, the trigonometric function takes time for the microcomputer, the table becomes large, and the ROM There is an influence such as an increase in the number of bytes used, and it is also necessary to integrate the above trigonometric function and Iα and Iβ. Also, because the configuration is such that Iα and Iβ are once calculated, the calculation shown in Equation 1 is necessary. It becomes.

Therefore, the microcomputer requires a calculation time. Especially when the carrier frequency is as high as 16 kHz, such as for use in a washing machine, the above-described configuration for obtaining the above Id and Iq for each carrier Although there is a merit that the values of Id and Iq having high responsiveness can be obtained, there are many cases where there is almost no effect obtained by agile changes to the voltage commands Vd and Vq depending on the use, and as a result, for example, 100 MIPS Such a high-speed and high-speed microcomputer is required, and the apparatus is also expensive.

  The present invention solves the above-described problems. In particular, the inverter circuit updates at least one of the phase and amplitude of the output line voltage approximately every 60 degrees of electrical angle, so that the processing speed required for the microcomputer, particularly Id. The calculation for obtaining Iq and Iq can be made very simple without using a trigonometric function, can be used with a microcomputer that is cheaper and has a low processing speed, and provides a low-cost power generation device. With the goal.

In order to solve the above-mentioned problem, a power generation device according to the present invention includes a first object having a three-phase winding, and a second object having a permanent magnet and rotatably provided with respect to the first object. A three-phase inverter circuit composed of six switching elements that supply electric power having a current waveform of approximately sinusoidal to the winding, and an electrical angle by detecting the position of the permanent magnet relative to the first object. and position detecting means for chromatic output logic changes at 60 degrees resolution, has a current sensing means for sensing the current of the winding, the inverter circuit, the output changes every output signal of the position detector has a current vector detection means for updating, it is to update the components Vd and Vq of the voltage vector approximately every 60 electrical degrees.

  As a result, the detection period of Id and Iq can be completed every 60 degrees of electrical angle, and in particular, the operation can be performed while calculating Id and Iq without using a trigonometric function. Therefore, it is possible to use a low-cost microcomputer and to reduce the cost.

  The power generation device of the present invention can realize a low-cost device.

According to a first aspect of the present invention, there is provided a first object having a three-phase winding, a second object having a permanent magnet and rotatably provided with respect to the first object, and a current waveform in the winding. Outputs a change in logic with a resolution of 60 degrees of electrical angle by detecting the position of the permanent magnet with respect to the first object and a three-phase inverter circuit composed of six switching elements that supply substantially sinusoidal power. and position detecting means for have a have a current detection means for detecting the current of the winding, the inverter circuit has a current vector detection means for updating the output for each output signal of the change of the position detecting means by updating the components Vd and Vq of the voltage vector approximately every 60 electrical degrees, while the calculation of the Id and Iq in a very simple calculation without using trigonometric functions, it becomes capable operating from, in particular trigonometric functions and the current value Calculation corresponding to calculation also can dispense with such rotation of the very simple registers, allowing the use of the processing speed is low inexpensive microcomputer, and which can be low-cost.

A second invention is, in particular, current sensing means in the first invention, by having assumed to have six resistors connected to one terminal of the three low-potential side switching elements of the switching element Thus, the current detection can be reliably performed with a relatively simple configuration, the calculation of Id and Iq can be simplified without using a trigonometric function, and the cost reduction effect can be obtained .

The third aspect of the invention has a detection period for temporarily changing at least one of the on-time or the switching period of at least one switching element immediately after the signal of the position detection means of the second aspect of the invention changes. As a result, even if the device has a high carrier frequency, the time required for the current detection means can be sufficiently secured. It can be used, and a low-cost power generation device can be realized.

In particular, the fourth invention includes any one of the first to third power generation devices and a rotating body that is rotationally driven by the power generation device, and the rotating body applies a mechanical force to the clothing to perform the processing. By configuring a clothing processing device that performs high-efficiency or high-speed rotation of a rotating body, it is possible to realize a clothing processing device that has an energy-saving effect or high clothing processing performance (washing performance, dewatering performance, drying performance) It becomes.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a block diagram of a power generation device according to a first embodiment of the present invention. In FIG. 1, a reactor 91 and a rectifier 92 are connected from a 100 V 50 Hz or 60 Hz AC power supply 90, and a DC voltage VDC is obtained in an electrolytic capacitor 93 connected to an output terminal of the rectifier 92, which is supplied to an inverter circuit 94. Is done. However, in addition to the conversion to the DC voltage in such a configuration, there is a configuration in which a higher DC power source is configured by using a voltage doubler rectifier circuit or a booster circuit. It doesn't matter.

  The inverter circuit 94 includes six switching elements 100, 101, 102, 103, 104, and 105 configured by connecting IGBTs and diodes in parallel, and three low-potential side switching elements 103, 104, and 105 among them. 106, 107, and 108 connected to the emitter terminal of the capacitor 93 are connected to the negative terminal of the capacitor 93, and the current detection means 110 is configured together with the A / D converter 109. The current values Iu, Iv, and Iw of each phase obtained as the output of the A / D converter 109 are configured to enter the current vector detection unit 111.

  A three-phase motor 115 is connected to the output of the inverter circuit 94, and the motor 115 is connected to the three output terminals U, V, and W of the inverter circuit 94 and is supplied with power by being connected to one end. The first object 119 having the windings 116, 117, and 118, and the second object having the permanent magnets 121 and 122 and provided so as to be rotatable relative to the first object 119. It has become a thing.

  In the present embodiment, the position detection means 130 is provided with three Hall elements 131, 132, 133 separated from each other by 120 electrical angles attached to the first object 119, and a permanent magnet for the first object 119. The positions of 121 and 122 are detected, and the shaping circuit 134 converts the analog signals from the three Hall elements 131, 132, and 133 into three shaped logic signals, and the logic changes every 60 degrees of electrical angle. The signal θ is output.

  In this embodiment, the A / D converter 109 and the current vector detection means 111 both receive the θ signal, but at the timing when the output signal θ of the position detection means 130 changes every electrical angle of 60 degrees. The A / D converter 109 starts a current detection operation.

  When the output signals Iu, Iv, and Iw of the current detection unit 110 are obtained by the A / D converter 109, the current vector detection unit 111 calculates Id and Iq by calculation. Since it has a resolution of electrical angle of 60 degrees, it is possible to perform a very simple calculation without using a trigonometric function.

The outputs Id and Iq of the current vector detection means 111 are output from the PI amplifier 140.
By passing the difference between the set value Idr of the direct axis current and the set value Iqr of the horizontal axis current through the PI amplifiers 141 and 142, the voltage commands Vd and Vq are obtained, and the three-phase rotary distributor 143 that receives the θ signal. The set value (= compare register value) of each phase voltage is determined, and the PWM circuit 144 performs pulse width modulation at a carrier frequency of 15.625 kHz, and both the upper and lower switching elements are turned off during the switching period of the upper and lower switching elements. It is output to the inverter circuit 94 while providing a dead time.

Since the A / D converter 109 of the current detection means 110 detects the current of the three-phase windings 116, 117, 118, the low-potential side switching elements 103, 104, 105 are turned on, and the windings 116, The phase of the carrier signal of the PWM circuit 144 is synchronized so that the currents 117 and 118 flow through the resistors 106, 107, and 108, respectively, immediately after the θ signal changes. The current detection operation is performed with the above switching timing.

  However, the emitter terminals of the three switching elements 103, 104, and 105 on the low voltage side are connected in common without using these three resistors 106, 107, and 108, and one is connected from the common emitter. The resistors may be connected, and the currents of the three-phase windings 116, 117, and 118 may be detected by appropriately detecting the voltage of the resistors in accordance with the on / off timing of the switching element, or three-phase. It is also possible to adopt a configuration in which the current of two phases is detected and the remaining one phase is obtained by Kirchhoff calculation.

  The PI amplifier 140 calculates an error between the set value ωr from the speed setting unit 150 and the actual rotational speed ω output from the speed detection unit 151 as a proportional component (P component) and a time integration component (I component). The speed detector 151 counts the output signal θ of the position detector 130 within a predetermined time, or measures the current time by measuring a time corresponding to an electrical angle of 60 degrees. In this configuration, the rotational speed is obtained.

  FIG. 2 is a graph of the output signals CS1, CS2, and CS3, voltage commands Vd and Vq, voltage amplitude | V |, and voltage phase δ of the position detector 130 in the present embodiment.

  Here, the voltage amplitude | V | is an absolute value of the voltage vector (Vd, Vq), and the voltage phase δ is an inverse TAN of the vector.

  In general literature, the symbol δ often indicates the phase angle of the induced electromotive force including the armature reaction from the q axis, but in the description of the present invention, the terminal voltage phase advance angle from the q axis is Shall be shown.

  The position detection means 130 has a resolution of an electrical angle of 60 degrees, and for each electrical angle of 60 degrees, three signals (a) CS1, (b) CS2, and (c) CS3 signals change one by one. Θ1, θ2, θ3, θ4, θ5, and θ6, which are set at an angle of 60 degrees, are the timing when the logic changes.

  In the present embodiment, the current value is updated by detecting Id and Iq only at these six timings as the electrical angle θ, and (d) Vd and (e) Vq are also Id and Iq. Since the calculation starts and is output immediately after the update, the update frequency is every 60 degrees of electrical angle, and | V | is updated as V1, V2, V3..., Δ is updated as δ1, δ2, δ3. It will be going.

In this embodiment, the update timing of Vd and Vq is a timing delayed by about 20 degrees in electrical angle from the output change timings θ1, θ2,... It fluctuates depending on the speed and the calculation time of the microcomputer used for the calculation. For example, the processing is always delayed within 60 degrees until the next change in the position detection signal after the electrical angle is delayed by 60 degrees. Vd and Vq may be updated at the change timing.

  In an actual power generation device, the values of Vd and Vq are processed in the microcomputer, and thus cannot be seen from the outside as a phenomenon, but even if expressed by (f) | V |, (ki) δ, It is also updated every 60 electrical angles.

  However, when the speed and load torque are stable, there is a case where the update is not necessary or the change width is very small.

  Therefore, if the operation is performed while giving a load change, the frequency and magnitude of the update increase to some extent, which is effective in confirming whether the operation of the present invention is performed.

  Also, depending on the conditions, it may appear that only one of | V | and δ changes, but when at least one of them changes, the voltage command vector (Vd, Vq) changes. it seems to do.

  As described above, in the present embodiment, the current vector detection unit 111 performs output update at the timing of every electrical angle 60 degrees and performs control, so that the calculation frequency is less than that performed every PWM carrier cycle. There is a tendency to be finished.

  FIG. 3 shows each winding generated when the second object is rotated by an external force in the open state in which the connection between the windings 116, 117, 118 and the inverter circuit 94 is disconnected for the electric motor 115 in the present embodiment. The waveform of the induced electromotive force (no-load induced electromotive force) and the waveforms of the three output signals CS1, CS2, and CS3 from the position detection unit 130 are shown.

  Assuming that θ = 0 is the zero point at which the U-phase induced electromotive force (A) switches from negative to positive, the V-phase induced electromotive force waveform (A) is delayed by 2π / 3 (120 degrees) with respect to the U phase. Further, that of the W phase (c) is delayed by 4π / 3 (240 degrees), and the induced electromotive force between the lines is the difference between the windings 116, 117, 118, so that the intersection, that is, θ = π / Lines at 6 (30 degrees), 3π / 6 (90 degrees), 5π / 6 (150 degrees), 7π / 6 (210 degrees), 9π / 6 (270 degrees), and 11π / 6 (330 degrees) There is a timing when the induced electromotive force becomes zero.

  In the output signals (d) CS1, (e) CS2, and (f) CS3 of the position detection means 130 in the present embodiment, both the high period and the low period have an electrical angle of 180 degrees (π). At the same time, since the phases are shifted from each other by 120, one of the three signals changes every 60 degrees of electrical angle, and the resolution is that of 60 degrees electrical angle.

  The electrical angle at which the signal changes is the above θ = π / 6 (30 degrees), 3π / 6 (90 degrees), 5π / 6 (150 degrees), 7π / 6 (210 degrees), 9π / 6 (270). Degrees) and 11π / 6 (330 degrees).

  FIG. 4 is a sectional view of the electric motor 115 of the present embodiment. The first object has a core 160 formed by stacking silicon steel plates, and the windings 116, 117, and 118 are all wound around the core 160. In the center, there is a second object 123 rotatably provided around an axis 161 and has permanent magnets 121 and 122.

In the present embodiment, Hall elements 131, 132, and 133 that are components of the position detection unit 130 are provided between the three-phase windings 116, 117, and 118 at a mechanical angle of 120 degrees, Positive Hall voltage when facing the permanent magnet 121 magnetized with the N pole on the outside, and negative when facing the permanent magnet 122 magnetized with the S pole on the outside. The positive Hall voltage is output.

  In the present embodiment shown in FIG. 4, since the motor 115 has two poles, the electrical angle is equal to the mechanical angle. However, in the case of four poles, six poles, the mechanical angle is It becomes 1/2, 1/3, etc. of the electrical angle.

  The Hall element is provided at a position intermediate between the windings 116, 117, and 118. However, the Hall element may be located at the same position as the winding. The output signal of the Hall element may change from positive to negative or from negative to positive, and one of the three Hall elements may be moved to a position shifted by an electrical angle of 180 degrees (π). Absent.

  In the present embodiment, the positive / negative of the output voltage of the Hall elements 131, 132, and 133 is converted into high / low logic, but what is called a Hall IC in which a circuit is integrated with the Hall element is used. Of course, you can use it.

  Further, in the present embodiment, the second object 123 is inside the first object 119 and has a so-called inner rotor shape in which the second object rotates. It is good also as a structure called an outer rotor which comes out of a 1st object.

  In the configuration of the electric motor 115 and the position detection unit 130, the operation of the current vector detection unit 111 will be described.

  FIG. 5 shows the timing at which the signal of the position detector 130 changes with respect to the waveforms of the currents Iu, Iv, and Iw flowing into the three-phase windings 116, 117, and 118. In this embodiment, FIG. The instantaneous current value of each UVW phase is A / D converted by the action of the current detection means 110 immediately after the timings θ1, θ2, θ3,. Current vectors Id and Iq are determined.

  Incidentally, in the example shown in FIG. 5, the current waveform is substantially a sine wave, and the current phase angle β is about +15 degrees (π / 12).

First, at the timing of θ1 = π / 6 (30 degrees), for Iu, Iv, and Iw ,
Id = −Iu · cos (π / 6) −Iv · cos (9π / 6) −Iw · cos (5π / 6)
Iq = Iu · sin (π / 6) + Iv · sin (9π / 6) + Iw · sin (5π / 6)
However, since the coefficients indicated by sin and cos are all constants, it is not necessary to calculate trigonometric functions one by one.
Id = 0.866 · (Iw−Iu)
Iq = 0.5 · (Iu + Iw) −Iv
And a simple calculation formula.

Similarly, at the timing of θ2 = 3π / 6 (90 degrees),
Id = −Iu · cos (3π / 6) −Iv · cos (11π / 6) −Iw · cos (7π / 6)
Iq = Iu · sin (3π / 6) + Iv · sin (11π / 6) + Iw · sin (7π
/ 6)
However, this is also a simple formula
Id = 0.866 · (Iw−Iv)
Iq = Iu−0.5 · (Iv + Iw)
It becomes.

In the present embodiment, the current detection means 110 detects the voltage of each phase of the three-phase windings 116, 117, 118 by detecting the voltage of the resistors 106, 107, 108. However, it may be configured to use a current detection module that can detect current from a DC component such as DCCT, and in that case, it is not necessary to provide all three phases. If DCCT is provided, Kirchhoff's law
It is clear that Iu = − (Iv + Iw), and DCCT is not included in the U-phase, and it can be sufficiently set by arithmetic calculation. However, when such a configuration is adopted, And the above Iq equation is
Iq = −1.5 · (Iv + Iw)
However, with respect to these calculation methods, a calculation method may be selected as appropriate from the processing speed of the microcomputer and the ease of programming.

  Hereinafter, with respect to θ3, θ4,..., The result is the same calculation in which UVW is switched, and as shown in Table 1, the absolute values of coefficients other than zero and 1 are 0.5 as shown in Table 1. Therefore, even if the constant is stored in the memory in the microcomputer, the memory can be reduced.

  Furthermore, 0.5 can be calculated very easily by shifting the register to the right by 1 bit, and for 0.866, 7/8 (= 0.875) is used as an approximation. Therefore, when multiplying, a simple register operation such as subtracting a value obtained by shifting the register 3 bits to the right from the original value can be used instead.

  The numerical value of 0.866 is exactly a value obtained by dividing “the square root of 3” by 2, and is an irrational number, but the error when using the above-mentioned 7/8 is only about 1%. Therefore, the calculation result can be obtained as a value having sufficient accuracy in practical use, and no problem occurs.

  Further, for example, when control is performed to keep Id = 0, the value before 0.866 is multiplied without using the above-described value of 0.866, that is, true Id / 0.866. The configuration may be such that control is performed using the value as it is.

As described above, the power generation device of the present embodiment can be calculated less frequently by performing the current vector calculation for every electrical angle of 60 degrees, and the coefficient of the calculation formula is also simple. While using an inexpensive and powerless microcomputer, it is possible to perform excellent control while detecting a current vector.

  FIG. 6 is a waveform diagram of the on / off signal UN of the switching element 103 of the inverter circuit 94 in this embodiment, where (a) shows the gate waveform of the switching element 103, and (b) shows the signal output of the position detection means 130. The change of one CS1 is shown with time on the horizontal axis.

In this embodiment, immediately after θ1, θ2,..., When the signal of the position detection unit 130 changes, the PWM circuit 144 performs the original carrier period for the three switching elements 103 , 104 , 105 on the low potential side. When the on-time at (frequency 15.625 kHz) is equal to or shorter than the predetermined period, the on-time and the switching period are forcibly expanded to secure the detection period.

  That is, in FIG. 6, θ1 (= π / 6) varies depending on the voltage phase δ, but the ON time of the switching element 100 on the high potential side of the U phase is considerably long and the conduction ratio is large. On the other hand, the switching element 103 on the low potential side is in a state where the on-time is short.

  In order to surely detect the U-phase winding current by the resistor 106, it is necessary to secure a certain amount of on-time of the switching element 103 in order to prevent the influence of noise and the time required for conversion of the A / D converter 109. There is.

  Thus, in the present embodiment, the switching element 103 is turned on and off until the timing t1 when CS1 changes, according to a normal PWM signal, and a comparison of the magnitude of the comparison register value with a triangular wave having a carrier frequency of 15.625 kHz. In contrast, the basic operation is that an on / off signal is generated by adding dead time processing, and after time t1, the on-time is increased for only one pulse. The A / D converter 109 can secure a predetermined time that can be converted into a digital value.

  For this reason, the on time ton2 immediately after t1 is set to be longer than the time ton1 of the immediately preceding on signal.

Furthermore, in order to compensate for an instantaneous error in the output voltage of the inverter circuit 94 due to the lengthening of ton2, in the present embodiment, it is assumed that the toff2 immediately after the ton2 is also extended from the immediately preceding on signal time toff1.
toff2 = toff1 · ton2 / ton1
As a result, the on-time ratio (on-duty) of the switching element 103 in this portion is maintained at a substantially constant value (= ton1 / (ton1 + toff1)), and the influence on the voltage waveform is almost the same. It will be canceled.

  In the present embodiment, the switching cycle of the switching element 103 is t01 before t1, but is expanded to t02 immediately after t1, and the switching frequency is temporarily reduced. It has become.

  For this reason, the noise aspect may be slightly disadvantageous. However, if there is only one pulse immediately after t1 and the ratio to the electrical angle of 60 degrees is low, there is almost no problem.

In particular, when the ratio of the on-time magnification ratio ton2 / ton1 is relatively small, the switching cycle is fixed to a constant value, that is, the switching frequency is kept constant, and one switching immediately after t1 is performed. It may be possible to adopt a method of canceling voltage fluctuations by setting the ON time ratio to be higher only for the period and conversely suppressing the ON time ratio in the next switching period.

In the above description, only the switching element 103 has been described, but the same applies to the switching elements 104 and 105. Immediately after the timing at which the signal of the position detection means 130 generated every 60 electrical angles changes, In order to ensure the time required for current detection, the on-time is changed, or the switching cycle is changed to set the current value detection period, which ensures the current detection. It is possible to control the motor 115 while detecting Id and Iq.

  As described above, the power generation device according to the present embodiment is realized without using a trigonometric function in the detection of Id and Iq. Therefore, even a cheap and weak power can work sufficiently.

  In particular, in the case of a power generation device that is operated at a high rotational speed, such as a fan motor of an electric vacuum cleaner, or in a case where the number of poles is, for example, 8 or more, such as a direct drive motor of an electric washing machine. The output signal of the position detection means that changes every 60 degrees of electrical angle tends to have a sufficiently high temporal resolution, and changes in the voltage phase δ and the current phase β due to the inertia of the second object, etc. The time corresponding to the electrical angle of 60 degrees with respect to the time span acts as a sufficiently fine resolution, so that sufficient stability performance can be given, and the current phase β has the highest efficiency. To save energy by driving in

  Alternatively, it is possible to achieve various effects such as weak field control with Id <0, and sufficient torque and output performance can be obtained even in a high-speed rotation range.

  In this embodiment, the voltage commands Vd and Vq are input to the three-phase rotary distributor 143, but instead of inputting Vd and Vq, an absolute voltage value | V | and a voltage phase δ are input. You may do it.

  Further, the three-phase rotary distributor 143 of the present embodiment changes the output with a certain degree of high resolution with respect to the electrical angle θ with a table or the like so that the output of each of the three phases with respect to the electrical angle θ is a sine wave. However, in such a configuration, a trigonometric table is required as the three-phase rotary distributor 143.

  However, in the present invention, the three-phase winding current and the winding voltage are not particularly limited to sine waves, and may be, for example, an inexpensive 120-degree rectangular wave drive, wide-angle energization, Or it can also be set as the control method which has a conduction angle wider than 120 degree | times of an electrical angle so that a trapezoidal wave drive etc. may be called.

  In these cases, the voltage phase angle δ is the leading electrical angle from the signal of the position detection means, and the absolute value | V | of the voltage is adjusted by the conduction ratio (on duty) of the switching element.

In these cases, the current waveform may be distorted to some extent, and the calculated values of Id and Iq may have a somewhat large error, but the magnetic fields of the permanent magnets 121 and 122 are still present. The control is performed separately for the current of the component that strengthens / weakens the current and the current of the component that is orthogonal to it, and the effect is sufficiently obtained, such as energy saving effect and securing output in the high speed range by weak magnetic field control Become.

(Embodiment 2)
FIG. 7 shows a cross-sectional block diagram of a clothing processing apparatus according to the second embodiment of the present invention. In FIG. 7, the power generation device 170 uses the one shown in the first embodiment.

  However, regarding the electric motor 171, instead of having two poles, instead of 24 permanent magnets magnetized so that the N pole is on the outside, the permanent magnets 24 magnetized so that the S pole is on the outside is reversed. The use of a total of 48 permanent magnets differs in that it has a configuration having a large number of 48 poles.

  The power generation device 170 takes in an AC power supply of 50 Hz or 60 Hz at 100 V from the power plug 173, and a cylindrical rotating body 175 generally called a rotating drum or the like is rotatably provided on an output shaft 161. And garment 176 is configured to be placed therein.

  In addition, the water supply means 180 is provided in a form in which a water supply pipe 181 connected to the water supply and a water supply valve 182 connected to the water supply pipe 181 are provided, and the tap water is opened in the rotating body 175 by opening the water supply valve 182. The clothes 176 are immersed in water containing detergent, and the power generator 170 is operated in this state, whereby the rotating body 175 rotates through the shaft 161 and is washed.

  The drain valve 186 is provided below the rotator 175. When the drain pipe 187 is opened by connecting the drain pipe 187, washing water flows out of the rotator 175 to the outside of the apparatus.

  The water supply valve control circuit 190 and the drain valve control circuit 191 give signals to the water supply valve 182 and the drain valve 186, respectively, to perform opening / closing control. In the clothing processing apparatus according to the present embodiment, the power generator 170 The water supply valve control circuit 190 and the drain valve control circuit 191 are operated in order so that washing and dehydration automatically proceed.

In the present embodiment, particularly during dehydration, the power generation device 170 directly connected to the rotating body 175 and the shaft 161 operates under an operating condition of Id <0 and rotates at a high torque even at a high speed of 1400 revolutions per minute. Therefore, a large centripetal acceleration is applied to the garment 176, and moisture is efficiently removed.

  During dehydration at high speed rotation, since the number of poles is particularly 48, the electrical angle of 60 degrees is as short as about 300 microseconds. It is possible to control Id and Iq with high frequency, and the effect is high.

  The clothing processing machine according to the present embodiment is configured to automatically perform washing and dehydration. However, even in a so-called clothing dryer, the rotary drum is similarly rotated and driven by a power generator. The configuration will be used.

  Furthermore, a washing / drying machine that performs fully automatic operations from washing to drying is also possible, and the shaft 161 is not horizontal but is provided with an inclination of, for example, about 20 degrees to 30 degrees, and is called a vertical type. It may be a vertical axis.

  Further, in the present embodiment, the rotating body 175 that is rotationally driven by the power generation device 170 is a so-called rotating drum or the like, but is not limited to such a shape, and is a vertical type. It may be a rotating body called a washing / dehydrating tub, pulsator, agitator, stirring blade, etc. of a washing machine of the washing machine. In short, it is processed by applying mechanical force to clothing directly by rotation or through washing liquid such as water. If it performs, it will be used in various configurations.

As described above, the power generation device according to the present invention has the current vector detection means in which the inverter circuit updates the output every time the output signal of the position detection means changes, and the components Vd and Vq of the voltage vector are substantially equal to the electrical angle. by updating every 60 degrees, the processing speed required for the microcomputer, in particular calculation for obtaining the Id and Iq, can be made very simple without using trigonometric functions, less expensive processing speed Therefore, a low-cost microcomputer can be used, and a low-cost power generation device can be provided.

1 is a block circuit diagram of a power generation device according to Embodiment 1 of the present invention. Same as above, power generator position detection means, voltage amplitude, voltage phase graph Same as above, output signal waveform diagram of position detection means of power generator Same as above, sectional view of the motor of the power generator Same as above, current waveform diagram of power generator Same as above, ON / OFF waveform diagram of switching element of inverter circuit of power generator Sectional drawing of the clothing processing apparatus in Embodiment 2 of this invention Control block diagram of a power generator in the prior art

94 Inverter circuit 100, 101, 102, 103, 104, 105 Switching element 106, 107, 108 Resistor 110 Current detection means 111 Current vector detection means 116, 117, 118 Winding 119 First object 121, 122 Permanent magnet 123 Second object 130 Position detecting means 131, 132, 133 Hall element 170 Power generation device 175 Rotating body 176 Clothing

Claims (4)

A first object having a three-phase winding, a second object having a permanent magnet and provided to be rotatable relative to the first object, and a power whose current waveform is approximately sinusoidal in the winding. 3 and phase inverter circuit constructed of six switching elements for supplying said first detecting the position of the permanent magnet relative to the object position detecting means for chromatic output logic is changed at a resolution of 60 electrical degrees Current detection means for detecting the current of the winding, and the inverter circuit has current vector detection means for updating the output every time the output signal of the position detection means changes, and the voltage vector component Vd and a power generation device to update approximately every electrical angle of 60 degrees Vq. Current sensing means, six three power generating device according to claim 1, further comprising a resistor connected to one terminal of the low-potential side switching elements of the switching elements. 3. The power generation device according to claim 2, further comprising a detection period in which at least one of an on time or a switching cycle of at least one switching element is temporarily changed immediately after the signal of the position detection means is changed. A clothing processing apparatus comprising: the power generation device according to any one of claims 1 to 3 ; and a rotating body that is rotationally driven by the power generation device, wherein the rotating body applies a mechanical force to clothing. .