CN101899764A - The motor drive of rinsing maching - Google Patents

The motor drive of rinsing maching Download PDF

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Publication number
CN101899764A
CN101899764A CN2010101889537A CN201010188953A CN101899764A CN 101899764 A CN101899764 A CN 101899764A CN 2010101889537 A CN2010101889537 A CN 2010101889537A CN 201010188953 A CN201010188953 A CN 201010188953A CN 101899764 A CN101899764 A CN 101899764A
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CN
China
Prior art keywords
mentioned
circuit
short circuit
power
short
Prior art date
Application number
CN2010101889537A
Other languages
Chinese (zh)
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CN101899764B (en
Inventor
细糸强志
永井一信
Original Assignee
株式会社东芝
东芝家用电器控股株式会社
东芝家用电器株式会社
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Publication date
Priority to JP2009125251A priority Critical patent/JP5575423B2/en
Priority to JP125251/2009 priority
Application filed by 株式会社东芝, 东芝家用电器控股株式会社, 东芝家用电器株式会社 filed Critical 株式会社东芝
Publication of CN101899764A publication Critical patent/CN101899764A/en
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Publication of CN101899764B publication Critical patent/CN101899764B/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30Driving arrangements 
    • D06F37/40Driving arrangements  for driving the receptacle and an agitator or impeller, e.g. alternatively
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry dryers
    • D06F58/02Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04Details 
    • D06F58/08Driving arrangements
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28Air properties
    • D06F2103/34Humidity
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/44Current or voltage
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/46Drum speed; Actuation of motors, e.g. starting or interrupting

Abstract

The invention provides the motor drive that can produce the rinsing maching of necessary booster voltage when motor is rotated at a high speed more reliably.The rotation speed change of the control parameter rotary drum electrical motor 5 when control circuit 42B turns round according to dehydration, during the zero passage timing of the voltage waveform of AC power, change the number of times of short circuit between the input terminal that makes full-wave rectifying circuit 45 by IGBT48, the electromagnetic energy that effectively utilizes reactor 44 to accumulate, and then the dc source boost in voltage that full-wave rectifying circuit 45 is exported.

Description

The motor drive of rinsing maching
Technical field
The present invention relates between AC power and rectification circuit, to possess the motor drive of the rinsing maching of reactor (reactor).
Background technology
For example in the patent documentation 1, for the scrubbing-and-drying unit of the 1st inverter (inverter) circuit with common drive washing dehydration motor with the structure of the dc source of the 2nd inverter circuit of the air compressor motor that drives heat pump, following formation is disclosed.
That is, dehydrate in the running, because the rotation at a high speed simultaneously of washing dehydration motor and air compressor motor, DC voltage reduces, and dehydrating speed and dehydration rate reduce, thereby drying time is long.In addition, when AC supply voltage reduced, alternating current increased, so the higher hamonic wave of power supply increases, the problem that exists the heating of the power component of reactor (inductive reactance device, coil), power supply diode etc. to increase.
Thereby, in the patent documentation 1, between AC power and inverter circuit, the short-circuit unit that connects reactor, generates the rectification circuit of dc source and make short circuit between the AC input terminal of this rectification circuit, in the stipulated time that the no-voltage from AC supply voltage begins, make short circuit between AC input terminal, flow through electric current, control dc source busbar voltage at reactor.
Patent documentation 1: TOHKEMY 2008-183087 communique.
But in the formation of patent documentation 1, the number of times that short-circuit unit is carried out short circuit is 1 time in the half period of commercial ac power source, therefore actually can't obtain the effect of boosting fully.
When for example in the dehydration running motor being rotated at a high speed, the high power supply voltage of the high induction voltage that need take place above coil by motor.Even as patent documentation 1, control the time of only carrying out 1 short circuit, voltage is risen to more than the electromagnetic energy that reactor accumulates, the effect of therefore boosting is limited.
Summary of the invention
The present invention proposes in view of the above problems, its objective is the motor drive that the rinsing maching of necessary booster voltage when motor is rotated at a high speed is provided.
In order to reach above-mentioned purpose, the motor drive of rinsing maching of the present invention is characterized in that, possesses:
Rectification circuit, it is connected with AC power via reactor;
Short-circuit unit, it makes short circuit between the input terminal of this rectification circuit;
Inverter circuit, it is connected with the outlet side of above-mentioned rectification circuit, and dc power is transformed to AC power, drives the motor of the rotary driving force that producing is used to dewater turns round at least; And
The short circuit control module, the variation of its control parameter when carrying out above-mentioned dehydration running changes the number of times that makes short circuit between above-mentioned input terminal during the zero passage of the voltage waveform of above-mentioned AC power regularly by above-mentioned short-circuit unit.
That is, during above-mentioned zero passage is regularly, if change the number of times of short circuit between the input terminal that makes rectification circuit, the then electromagnetic energy that can effectively utilize reactor to accumulate, and then the dc source boost in voltage that rectification circuit is exported.Thereby the rotating speed of motor further rises in the dehydration running, can improve dewatering efficiency.
According to the motor drive of rinsing maching of the present invention, the rotating speed of motor is risen, improve the efficient of dehydration running, therefore can suppress current drain, realize economizing electrification.
Description of drawings
Fig. 1 is the 1st embodiment, is the schematic view of driving control system of each motor of cylinder, fan, compressor in the scrubbing-and-drying unit.
Fig. 2 is the vertical disconnected side view of the formation of drum-type washing drying machine.
Fig. 3 is the pie graph of heat pump.
Fig. 4 is the general flowchart of a series of operation action of scrubbing-and-drying unit.
Fig. 5 is the flow chart of the processing of control circuit control driving power voltage.
Fig. 6 is the sequential chart that cleans to the stroke of dehydration.
Fig. 7 is the oscillogram of the state of mains voltage variations.
The diagrammatic sketch of the maximum speed of accessible motor when Fig. 8 (a) is the dc source voltage change is to make voltage change equally (b), and the rotating speed of motor is made as the diagrammatic sketch of the consumed power of the inverter circuit of 1200rpm when constant.
Fig. 9 is the figure suitable with Fig. 6 of expression the 2nd embodiment.
Figure 10 is the detail flowchart of the processing corresponding with step S14.
Figure 11 is the figure suitable with Figure 10 of expression the 3rd embodiment.
Figure 12 is the figure suitable with Figure 11 of expression the 4th embodiment.
Figure 13 is the figure suitable with Figure 11 of expression the 5th embodiment.
Figure 14 is the figure suitable with Figure 10 of expression the 6th embodiment.
Figure 15 is the figure suitable with Fig. 7.
Figure 16 is the figure suitable with Figure 14 of expression the 7th embodiment.
Figure 17 is the figure suitable with Figure 14 of expression the 8th embodiment.
Figure 18 is the figure suitable with Figure 14 of expression the 9th embodiment.
[explanation of symbol]
5 rotary drum electrical motors, 7 cylinders, 22 fan motors, 27 compressors, 28 air compressor motors, 42 control circuits, 42B control circuit (short circuit control module), 34,38,40 inverter circuits, 43 driving power circuits, 44 reactors, 45 full-wave rectifying circuits (rectification circuit), 47 full-wave rectifying circuits (short-circuit unit), 48IGBT (short-circuit unit), 60 drive units.
The specific embodiment
(the 1st embodiment)
Below, referring to figs. 1 through Fig. 8 the 1st embodiment is described.Fig. 2 is the vertical disconnected side view of the formation of drum-type washing drying machine.Outer container 1 form have header board, the hollow form of back plate, left plate, right plate, base plate and top board, form at the header board of outer container 1 and to connect poroid gateway 2.
Header board at this outer container 1 is installed door 3.This door 3 can be operated from the place ahead by the user, switches each other at closed state and open mode, and gateway 2 sealings under the closed state of door 3, open gateway 2 under the open mode of door 3.
Internal fixation water reception tank 4 at outer container 1.This water reception tank 4 forms the cylindric of back face closure, and the heeling condition that in the past descends backward with axial line CL disposes.The front openings of this water reception tank 4, under the closed state of door 3, the door 3 preceding face closures with water reception tank 4 are airtight conditions.
At the back plate of water reception tank 4, be positioned at the outside of water reception tank 4, be fixed with rotary drum electrical motor 5.This rotary drum electrical motor 5 comprises the DC brushless motor of speed-controllable system, and the rotating shaft 6 of rotary drum electrical motor 5 is outstanding to the inside of water reception tank 4.
The axial line CL overlay configuration of this rotating shaft 6 and water reception tank 4 at rotating shaft 6, is positioned at the inside of water reception tank 4, is fixed with cylinder 7.This cylinder 7 forms the cylindric of back face closures, and operating condition and rotating shaft 6 by rotary drum electrical motor 5 rotate integratedly.
The front of this cylinder 7 is relative with the rear of gateway 2 via the front of water reception tank 4, and under the open mode of door 3, washings in the past square tube is crossed the front of the front of gateway 2, water reception tank 4 and cylinder 7 and the inside of the cylinder 7 of coming in and going out.
Form a plurality of through holes 8 in the cylinder 7, the inner space of cylinder 7 is connected with the inner space of water reception tank 4 by a plurality of through holes 8.Be fixed with a plurality of baffle plates (barrier) 9 in this cylinder 7.
These a plurality of baffle plates 9 are that move along circumferencial direction at the center along with cylinder 7 rotation with axial line CL respectively, the washings in the cylinder 7 hang over a plurality of baffle plates 9 each go up and along the circumferential direction move after because of gravity fall, stir.
Internal fixation at outer container 1 has water-supply valve 10.This water-supply valve 10 has entrance and exit, and the inlet of water-supply valve 10 is connected with the hose of water channel (running water pipe).As drive source, switch between open mode and closed state according to the conduction and cut-off of calutron by the outlet of water-supply valve 10 with not shown calutron for this water-supply valve 10.
The outlet of this water-supply valve 10 is connected with water injecting tank 12, and under the open mode of water-supply valve 10, water channel water (running water) injects in water injecting tank 12 by water-supply valve 10, and under the closed state of water-supply valve 10, water channel water does not inject in the water injecting tank 12.This water injecting tank 12 in the position that is higher than water reception tank 4, has the water filling port 13 of tubular in the internal fixation of outer container 1.
The inside that this water filling port 13 inserts water reception tank 4, the water channel water that injects in water injecting tank 12 from water-supply valve 10 injects to the inside of water reception tank 4 from water filling port 13.
Water reception tank 4 is positioned at bottommost, is connected with the upper end of drainpipe 14, and has draining valve 15 between the drainpipe 14.This draining valve 15,, switches between open mode and closed state according to the rotating of draining valve motor as drive source with not shown draining valve motor.
Under the closed state of this draining valve 15, resident in water reception tank 4 from the water channel water that water filling port 13 injects in water reception tank 4, under the open mode of draining valve 15, the water channel water in the water reception tank 4 is discharged to the outside of water reception tank 4 by drainpipe 14.
At the base plate of outer container 1, be positioned at the below of water reception tank 4, be fixed with trunk line 17.This trunk line 17 forms the tubular that points to fore-and-aft direction, and the leading section of trunk line 17 is connected with the bottom of preceding pipeline 18.
This preceding pipeline 18 is meant the tubular of direction up and down, and the upper end of preceding pipeline 18 is connected to the inner space of water reception tank 4 by the leading section of water reception tank 4.Rearward end at trunk line 17 is fixed with fan box 19.
This fan box 19 has the poroid air entry 20 of perforation and the exhaust outlet 21 of tubular, and the inner space of fan box 19 is connected via the inner space of air entry 20 with trunk line 17.
At fan box 19, be positioned at the outside of fan box 19, be fixed with fan motor 22.This fan motor 22 has to the outstanding rotating shaft 23 in the inside of fan box 19, at rotating shaft 23, is positioned at the inside of fan box 19, is fixed with fan 24.
This fan 24 is axially to suck air and the core type fan far away that radially spues, and the air entry 20 of fan box 19 is axially relative with fan 24 from fan 24, and the exhaust outlet 21 of fan box 19 is radially relative with fan 24 from fan 24.
The exhaust outlet 21 of fan box 19 is connected with the bottom of back pipeline 25.This back pipeline 25 is meant the tubular of direction up and down, and the upper end of back pipeline 25 is connected to the inner space of water reception tank 4 by the rearward end of water reception tank 4.
The inner space that these back pipelines 25, fan box 19, trunk line 17, preceding pipeline 18, water reception tank 4 constitute with water reception tank 4 is the circulating line 26 of the ring-type of initial point and terminal point, under the closed state of door 3, during fan motor 22 runnings, rotation by fan 24 along certain orientation, air in the water reception tank 4 is interior by attracteding in the trunk line 17 in the fan box 19 from preceding pipeline 18, and is interior by returning in the water reception tank 4 in the pipeline 25 of back from fan box 19.
Internal fixation at outer container 1 has compressor 27.This compressor 27 has the discharge opening of the refrigerant that spues and the suction inlet of suction refrigerant in the exterior arrangement of circulating line 26.As drive source, compression motor 28 comprises the brushless motor of speed-controllable system to this compressor 27 with air compressor motor (hereinafter referred to as the compression motor) 28 (reference Fig. 1 described later).
The internal fixation of trunk line 17 has condenser (condenser) 29.This condenser 29 is used to add hot-air, by constituting with the fixing tabular a plurality of heating fins (fin) 31 of contact condition at the outer peripheral face with 1 refrigerant pipe 30 of the sigmoid that crawls.
The refrigerant pipe 30 of this condenser 29 is connected with the discharge opening of compressor 27, and under the operating condition of compression motor 28, the refrigerant that spues from the discharge opening of compressor 27 enters in the refrigerant pipe 30 of condenser 29.
In the inside of outer container 1, be fixed with capillary (pressure reducer) 32 as shown in Figure 3.This capillary 32 is connected with the refrigerant pipe 30 of condenser 29, in the exterior arrangement of circulating line 26.
This capillary 32 is used in the downstream of condenser 29 refrigerant mobile carried out throttling, is made of 1 pipe.
Internal fixation at trunk line 17 has evaporimeter 33.This evaporimeter 33 is used to cool off air, compares with condenser 29, in the upstream side configuration of air flow.
Fig. 1 is the schematic view of the driving control system of rotary drum electrical motor 5, fan motor 22 and compression motor 28.Inverter circuit 34 is made of 6 IGBT (switch element) 35a~35f three phase bridge, between colelctor electrode-emitter stage of each IGBT 35a~35f, connects fly-wheel diode (free-wheeling diode) 36a~36f.Each phase output terminals of inverter circuit 34 is connected with each phase coil of rotary drum electrical motor 5.
IGBT 35d, the 35e of underarm side, the emitter stage of 35f are connected with ground via shunt resistance 37u, 31v, 37w.In addition, common (shared, public) tie point of the emitter stage of IGBT 35d, 35e, 35f and shunt resistance 37u, 31v, 37w is connected with the input terminal of a side control circuit (microprocessor, microcomputer) 42A.
The inside of control circuit 42A, though not shown, form the formation comprise operational amplifier etc., apply bias voltage by level shift circuit, with the terminal voltage that amplifies shunt resistance 37u~37w and the output area that makes this amplifying signal positive side convergence (for example, 0~+ 3.3V).In control circuit 42A, damage of circuit when preventing the upper and lower arm short circuit of inverter circuit 34 and have and carry out the function that overcurrent detects.
To same inverter circuit 38 and the shunt resistance 39 (u, v, w) that constitutes of fan motor 22 configurations, equally to compression motor 28 configuration inverter circuit 40 and shunt resistances 41 (u, v, w).
Inverter circuit 38 and 40 control are undertaken by the opposing party's control circuit 42B (microprocessor, microcomputer, short circuit control module), and control circuit 42A, 42B can carry out the two-way communication based on serial communication.
The input side of inverter circuit 34,38,40 is connected with power circuit 43 with driving.Drive with power circuit 43 via distolateral be connected of reactor (inductive reactance device) 44, possess a side's who constitutes by diode bridge full-wave rectifying circuit 45 and 2 condenser 46a, 46b that are connected in series with the outlet side of full-wave rectifying circuit 45 with the AC power of 100V.
The common tie point of condenser 46a, 46b is connected with a side of the input terminal of full-wave rectifying circuit 45.Drive with power circuit 43,, the AC power of 100V is carried out a times voltage full-wave rectification, supply with the DC voltage of about 280V to inverter circuit 34 grades in the occasion of not carrying out the boost action of employing reactor 44 described later.
The input terminal of full-wave rectifying circuit 45 is connected in parallel with the opposing party's who is made of diode bridge equally full-wave rectifying circuit 47 (short-circuit unit), is connected with IGBT48 (short-circuit unit) between the lead-out terminal of full-wave rectifying circuit 47.The conducting of IGBT48 is undertaken by control circuit 42B by control.
Be connected with the series circuit of series circuit, resistance 50a and the 50b of resistance 49a and 49b between the input terminal of inverter circuit 34,38 respectively, common tie point separately is connected with the input terminal of control circuit 42A, 42B.
Control circuit 42A, 42B detect the driving power voltage to inverter circuit 34,38 inputs by the voltage with reference to above-mentioned each common tie point.
In addition, for the detection rotor position, rotary drum electrical motor 5 is disposed the position sensor 51 (u, v, w) that Hall IC for example etc. constitutes, the sensor signal of position sensor 51 outputs offers control circuit 42A.
In addition, insert the current sensor 52 that current transformer (CT) for example etc. is formed between AC power and the reactor 44, the sensor signal of current sensor 52 outputs offers control circuit 42B.
Control circuit 42A, 42B detect the electric current of each phase coil that flows to rotary drum electrical motor 5, fan motor 22, compression motor 28, infer the phase theta and the angular velocity of rotation ω of the rotating excitation field of 2 sides according to this current value, and (direct-quadrature: direct quadrature) coordinate transform obtains excitation current component Id, torque current component Iq by three-phase current being carried out orthogonal coordinates conversion and dq.
Then, after by the outside control circuit 42A, 42B being applied speed command, presumptive phase theta and angular velocity of rotation ω and current component Id, Iq, generate current-order Idref, Iqref, after this current-order Idref, Iqref be transformed to voltage instruction Vd, Vq, carry out orthogonal coordinates conversion and three-phase coordinate transform.
Finally, drive signal and generate, via inverter circuit 34,38,40 each phase coil output to above-mentioned each motor 5,22,28 as pwm signal.
In the above formation, inverter circuit 34, control circuit 42A and 42B, driving constitute drive unit 60 with power circuit 43, reactor 44, rectification circuit 47, IGBT48.
The effect of present embodiment then, is described with reference to Fig. 4 to Fig. 8.Fig. 4 is the general flowchart of a series of operation action of scrubbing-and-drying unit.At first, after cylinder 7 water fillings, make cylinder 7 rotatings, clean action (step S1) with the rotating speed of about 46rpm.
Then, carry out centre dehydration after, the rinsing action is carried out in water filling once again, but in the middle of the rotating speed of cylinder 7 in the dehydration be about 1200rpm, the rinsing action is and same about 46rpm (step S2) is moved in cleaning.
Then, carry out final dewatering with the about 1700rpm of rotating speed after, make compressor 27 and fan 24 actions, send warm braw to cylinder 7, with about 46rpm rotating, carry out removal moisture drying and move (step S3).
Fig. 5 is illustrated in a series of action shown in Figure 4, and control circuit 42B is that IGBT48 switches and controls the flow chart of the processing of driving power voltage to short-circuit unit.Clean in action, the rinsing action, with about 46rpm rotating (step S11: be), then IGBT48 keeps cut-off state, the not short circuit of input side of full-wave rectifying circuit 45 as if cylinder 7.That is, boost action is not carried out (step S12).
When centre dehydration and final dewatering action make cylinder 7 high speeds rotate like that (step S13: be), in order to make IGBT48 (between the zero passage of voltage waveform (zero cross) point) repeatedly (for example 2 times) conducting in the half period of AC supply voltage, apply pulse signal (short circuit pulse) to grid, make the input side short circuit (step S14) of full-wave rectifying circuit 45.
That is, make the input side short circuit of IGBT48 conducting and full-wave rectifying circuit 45 after, reactor 44 therebetween can be accumulated electromagnetic energy, IGBT48 then flows through reactor 44 with the corresponding electric current of the energy of accumulating, thereby carries out boost action if end then.
At this moment, even the time of IGBT48 conducting is long,, limited by the voltage that 1 short circuit can be boosted because the electromagnetic energy that reactor 44 is accumulated is saturated.But, in the half period of AC supply voltage, carry out short circuit if repeatedly make the IGBT48 conducting, then can booster voltage be risen according to this number of times.
In addition, in the present embodiment, detect alternating current, but in the commercial ac power source, owing to voltage, electric current homophase, so the zero crossing of alternating current is consistent with the zero crossing of alternating voltage by current sensor 52.
In addition, when cleaning, rinsing action do not make cylinder 7 rotatings and dehydration action that cylinder 7 is rotated at a high speed like that (step S13: deny), judge whether to flow through big electric current (for example, more than the consumed power 600W) (step S15) by compressor 27 actions.
If flow through big electric current (step S15: be, for example in drying action, by when the indoor air conditioning function that send cold wind moves, there is the rotating speed of compression motor 28 to rise, the situation that refrigerant pressure rises etc.), then IGBT48 conducting in the half period of AC supply voltage makes the input side short circuit (step S16) of full-wave rectifying circuit 45.
This occasion is not a boost action, but improves the action (the higher harmonic restraining braking is done) of the power factor of power supply.
Fig. 6 is the sequential chart of representing from the stroke that cleans to dehydration, and the flow process of stroke ratio Fig. 4 is more detailed.Before the feedwater beginning, the weight of reading washings, carry out the rinsing action before, spray feedwater and middle dehydration are carried out 2 times repeatedly.
Fig. 7 presentation graphs 5 carries out the variable condition of power supply when control supply voltage like that, as the operating condition of scrubbing-and-drying unit, is to dewater and make compressor 27 actions, the situation that amounts to about 650W (AC supply voltage 105V) of input power.
Shown in Fig. 7 (a), when IGBT48 kept in cut-off state, output current was that the DC voltage of 295V is because the influence of output current and line impedence is reduced to 230V under zero the state.
According to this state, shown in Fig. 7 (b), make IGBT48 in the half period of AC supply voltage after the conducting 1 time (S16 is corresponding with step), the power-factor improvement of alternating current, higher hamonic wave also reduces, and DC voltage rising is to 265V.
And shown in Fig. 7 (c), making IGBT48 in the half period of AC supply voltage after 2 conductings (S14 is corresponding with step), DC voltage rising is to 295V.This occasion, the conducting of IGBT48 regularly are at the 0.6m of the 2m that begins from zero crossing after second between second, and 0.3m between the second conducting of 2m after second again.
The maximum speed of accessible rotary drum electrical motor 5 during Fig. 8 (a) expression dc source voltage change, along with supply voltage uprises, maximum speed also rises.Thereby the time of dehydration running, dry operating can shorten.
In addition, Fig. 8 (b) expression makes voltage change equally, and the rotating speed that makes rotary drum electrical motor 5 is the consumed power of the inverter circuit 34 of 1200rpm certain hour.
This occasion is judged as along with supply voltage uprises, and consumed power reduces, and is reduced to 223W from 240W, and slip is 7.6%.
According to above present embodiment, the rotation speed change of the control parameter rotary drum electrical motor 5 when control circuit 42B turns round according to dehydration makes the number of times of short circuit between the input terminal of full-wave rectifying circuit 45 by IGBT48 in change during the zero passage timing of the voltage waveform of AC power.
Thereby, the electromagnetic energy that can effectively utilize reactor 44 to accumulate, the dc source boost in voltage that rectification circuit 45 is exported.
Thereby, the rotating speed of dehydration running intermediate roll motor 5 is further risen, improve dewatering efficiency, suppress current drain, realize economizing electrification.
When control circuit 42B carried out 2 short circuits during the zero passage timing of above-mentioned voltage waveform, in the high more timing of the wave amplitude of voltage waveform, short circuit duration was short more, therefore can reduce the distortion of AC current waveform, improves power factor.In addition, can realize constituting the protection of the IGBT35 of inverter circuit 34.
In addition, even control circuit 42B in the occasion of running and drive compression machine 27 of dewatering, is the variation of output current according to the parameter of controlling compressor 27 also, change the number of times of short circuit between the input terminal that makes rectification circuit 45 by IGBT48.
Thereby, in the occasion of big current direction compressor 23, can improve power factor, reduce higher hamonic wave, dc source voltage is risen, suppress current drain.
(the 2nd embodiment)
Fig. 9 and Figure 10 are the 2nd embodiment, enclose prosign with the 1st embodiment with a part, omit explanation, and different piece below is described.Fig. 9 is the figure suitable with Fig. 6, after the expression scrubbing-and-drying unit carries out final dewatering, proceeds to the situation till drying is moved.
At this moment, final dewatering divided for 4 stages carried out, and the maximum speed of the rotary drum electrical motor 5 in each dehydration action is set for according to 400rpm, 700rpm, 950rpm, 1700rpm and risen gradually.
Figure 10 represents the processing details corresponding with the step S14 of Fig. 5.Whether the setting of judging rotating speed is more than 950rpm (step S21), if (be) further to judge whether more than 1450rpm (step S22) more than 950rpm.If (be) that then 3 output short-circuit pulses (step S23) make 3 short circuits of input terminal of rectification circuit 45 in the half period of AC supply voltage, dc source voltage is further boosted more than 1450rpm.
In addition, among the step S22, rotating speed is as if not enough 1450rpm (N=0), and is then same with the 1st embodiment, 2 output short-circuit pulses (step S25).In addition, step S22 medium speed is because the middle dehydration of cleaning in the action is 1200rpm as threshold value with 1450rpm.
According to the 2nd above embodiment, control circuit 42B rotating speed along with rotary drum electrical motor 5 when dewatering running improves, and increases the number of times of short circuit between the input terminal that makes rectification circuit 45, therefore, dc source voltage is further risen, improve the rotating speed of motor 5.
(the 3rd embodiment)
Figure 11 is the 3rd embodiment, and the part different with the 2nd embodiment is described.Figure 11 is the figure suitable with Figure 10, and the step S21A of step of replacing S21, S22, the content of the judgement among the S22A are different.
Control circuit 42B detects the interchange input current (control parameter) that drives with power circuit 43 by current sensor 52, judges whether the virtual value of this electric current is 3 amperes [A] above (step S21A).If current effective value (is) further to judge whether it is (step S22A) more than 5 amperes more than 3 amperes.If more than 5 amperes (be), execution in step S23,3 output short-circuit pulses make 3 short circuits of input terminal of rectification circuit 45 in the half period of AC supply voltage.
If 5 amperes of less thaies (denying), execution in step S25,2 output short-circuit pulses.
That is, it is corresponding with the rotating speed height of rotary drum electrical motor 5 to drive the size of using the interchange input current in the power circuit 43, and therefore the situation of the 3rd embodiment also can obtain the effect same with the 2nd embodiment.
(the 4th embodiment)
Figure 12 is the 4th embodiment, and the part different with the 3rd embodiment is described.Figure 12 is the figure suitable with Figure 11, among the step S21B of step of replacing S21A, S22A, the S22B, replaces driving detects the input current (control parameter) of rotary drum electrical motor 5 with the interchange input current of power circuit 43 virtual value.This occasion disposes current sensor for example either party of the power source bus of inverter circuit 34 and gets final product.
Whether control circuit 42B judges the input current virtual value of rotary drum electrical motor 5 at (step S21B) more than 1.5 amperes, and current effective value is if (be) further to judge whether more than 2.2A (step S22B) more than 1.5 amperes.
Current effective value is if more than 2.2A (step S22B is), execution in step S23 then, 3 output short-circuit pulses.If 5 amperes of less thaies (denying), execution in step S25 then, 2 output short-circuit pulses.
That is, the size of the interchange input current of rotary drum electrical motor 5 is corresponding with the rotating speed of rotary drum electrical motor 5 height, and therefore the situation of the 4th embodiment also can obtain the effect same with the 3rd embodiment.
(the 5th embodiment)
Figure 13 is the 5th embodiment, illustrates and different parts such as the 3rd embodiment.Figure 13 is the figure suitable with Figure 11, in step S21C, the S22C of step of replacing S21A, S22A, detects the ac input power (control parameter) that drives with power circuit 43.
This occasion, the voltage sensor that disposes the instrumentation AC-input voltage as required gets final product.Whether control circuit 42B judge drives with the input power of power circuit 43 300 watts (W) more than (step S21C), and input power is as if (being) then further to judge whether at (step S22C) more than 500 watts more than 300 watts.
If more than 500 watts (be), if execution in step S23 then is 500 watts of less thaies (denying), then execution in step S25.
That is, drive with the size of the ac input power of power circuit 43 correspondingly with the rotating speed height of rotary drum electrical motor 5, so the situation of the 5th embodiment also can obtain the same effect with the 3rd embodiment etc.
In addition, step S21C, S22C and the 4th embodiment are same, also can the input power setting threshold of rotary drum electrical motor 5 be detected above-mentioned input power and judge.
(the 6th embodiment)
Figure 14 and Figure 15 are the 6th embodiment, and the part different with the 2nd embodiment is described.Figure 14 is the figure suitable with Figure 10, and among the step S23A of step of replacing S23, S25, the S25A, control circuit 42B makes the number of times of the input terminal short circuit of power circuit 43 in the half period of AC power all be 2 times.
In step S23A, S25A, change the timing of carrying out 2 short circuits.Figure 15 represents corresponding voltage, current waveform.In addition, short circuit pulse width and the 1st embodiment are same.
Among the step S25A, the 1st short circuit begun to be made as the 1.2m second that begins from the zero crossing of alternating voltage waveform, the 2nd short circuit begun to be made as the 1.0m that finishes since the 1st short circuit after second (with reference to Figure 15 (b)).On the other hand, among the step S23A, the 1st short circuit begun to be made as the 1.7m second that begins from the zero crossing of alternating voltage waveform, the 2nd short circuit begun to be made as the 1st short circuit finish the 1.0m of beginning after second (with reference to Figure 15 (c)).
Therefore that is, ac power frequency is the occasion of 60Hz, and 1/2 cycle became 8.33 seconds, and the wave amplitude of alternating voltage reaches peak value after begin from zero crossing 4.17 seconds.Therefore thereby during this period, the timing of beginning short circuit is slow more, and the current value of energising is big more in the reactor 44, can improve the effect of boosting (265V → 295V).
In addition, Figure 15 (a) is the situation that the 1st short circuit is begun be made as the 0.7m second that begins from zero crossing of usefulness relatively, and DC voltage becomes 235V.
According to the 6th above embodiment, control circuit 42B improves at when running rotating speed along with rotary drum electrical motor 5 of dewatering, lengthening from the zero passage of alternating voltage waveform be timed to that short circuit begins during, therefore can regulate between the short circuit elementary period control booster voltage.
(the 7th~the 9th embodiment)
Figure 16 to Figure 18 is the 7 9th embodiment, and expression is with the situation of the judgment processing combination of the 3rd~the 5th embodiment of the short circuit processing among the 6th embodiment of Figure 14 explanation and Figure 11~Figure 13 explanation.The situation of these 7 9th embodiment also can obtain the effect same with the 6th embodiment.
The invention is not restricted to above-mentioned or the described embodiment of drawing, can carry out following distortion or expansion.That is can comprehensively be a control circuit also, with control circuit 42A, 42B.Short circuit number of times in the AC power half period also can be set for more than 4 times.The delay time that pulse width when carrying out short circuit by IGBT48, zero crossing begin also can suit to change.
Thyristor is not limited to IGBT, also can adopt bipolar transistor and MOSFET.
The setting of the threshold value that rotating speed, voltage, electric current, power are correlated with only is an example, also can be according to individual other other appropriate design changes.
Also go for not having the rinsing maching of functions/drying.

Claims (6)

1. the motor drive of a rinsing maching is characterized in that, possesses:
Rectification circuit, it is connected with AC power via reactor;
Short-circuit unit, it makes short circuit between the input terminal of this rectification circuit;
Inverter circuit, it is connected with the outlet side of above-mentioned rectification circuit, and dc power is transformed to AC power, drives the motor of the rotary driving force that producing is used to dewater turns round at least; And
The short circuit control module, the variation of its control parameter when carrying out above-mentioned dehydration running changes the number of times that makes short circuit between above-mentioned input terminal during the zero passage of the voltage waveform of above-mentioned AC power regularly by above-mentioned short-circuit unit.
2. the motor drive of rinsing maching according to claim 1 is characterized in that,
Possess inverter circuit, its driving is configured for carrying out the compressor of the heat pump of dry operating,
Above-mentioned short circuit control module also according to the variation of the parameter of controlling above-mentioned compressor, changes the number of times that makes short circuit between above-mentioned input terminal by above-mentioned short-circuit unit when carrying out above-mentioned dehydration running and driving above-mentioned compressor.
3. the motor drive of rinsing maching according to claim 1 and 2 is characterized in that,
Possess input detection unit, it detects the power or the electric current of the above-mentioned inverter circuit of input,
Above-mentioned short circuit control module when above-mentioned input power or electric current are big, make from the zero passage of above-mentioned voltage waveform be timed to till the beginning short circuit during lengthening.
4. the motor drive of rinsing maching according to claim 1 and 2 is characterized in that,
Above-mentioned short circuit control module is dewatering when running, increases the number of times that carries out above-mentioned short circuit along with the raising of the rotating speed of above-mentioned motor.
5. the motor drive of rinsing maching according to claim 1 and 2 is characterized in that,
Above-mentioned short circuit control module is dewatering when running, extend along with the raising of the rotating speed of above-mentioned motor from the zero passage of above-mentioned voltage waveform be timed to till the beginning short circuit during.
6. the motor drive of rinsing maching according to claim 1 is characterized in that,
When above-mentioned short circuit control module repeatedly carries out short circuit during the zero passage timing of above-mentioned voltage waveform,, make short circuit duration short more in the high more timing of the wave amplitude of above-mentioned voltage waveform.
CN2010101889537A 2009-05-25 2010-05-25 Motor driver for washing machine CN101899764B (en)

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JP5575423B2 (en) 2014-08-20

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