CN1988368A - Frequency changing AC speed changing driving washing machine - Google Patents
Frequency changing AC speed changing driving washing machine Download PDFInfo
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- CN1988368A CN1988368A CNA2005101210510A CN200510121051A CN1988368A CN 1988368 A CN1988368 A CN 1988368A CN A2005101210510 A CNA2005101210510 A CN A2005101210510A CN 200510121051 A CN200510121051 A CN 200510121051A CN 1988368 A CN1988368 A CN 1988368A
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Abstract
A washing machine driven by frequency conversion AC speed includes: a repeatedly reversible rotation washing mechanical system and a one-way rotation spinning mechanical system, a drive unit output rotation force to the washing mechanical or the spinning mechanical system, an asynchronous motor driving said drive unit and an adjustable supply with adjustable output frequency F and voltage U to supply to the asynchronous motor characterizing that the washing mechanical system can rotate reversibly and the spinning mechanical system rotates in one way the total or part of the start up process from zero to the maxium speed, the frequency F output by the adjustable supply is the increased function of time T, and voltage U is the increasing function of F.
Description
Technical field
The present invention relates to the washing machine that a kind of frequency changing AC speed changing drives, especially so domestic full-automatic washing machine in International Patent Classification (IPC), can belong to D06F33/02.
Background technology
For improving performance, the washing machine system of domestic electric washer is or/and the dewatering machine system is developed to the frequency changing AC speed changing driving by single-phase driving in the past in recent years, promptly the single phase alternating current power supply of former fixed frequency is directly driven single-phase capacitor operation asyn. motor, but change inverter circuit of control into the symmetrical polyphase source of described power source conversion one-tenth variable voltage variable frequency, drive the polyphase ac asynchronous motor.But prior art mainly is that industrial general converter technology is directly used in washing machine, has reduced noise, improve efficient and obtained suitable speed-regulating function, but still not enough in conjunction with the improvement of the operation characteristic of washing machine.For example, the washing machine system drives current and drives the clothing motion in the reversible operation of just changeing-stopping-reverse-stop repeatedly, accelerator when each forward or reverse starts makes washings produce vital rolling with regard to washing mechanism in the cleaning solution, therefore need suitable acceleration, but too high acceleration damages the clothing that contacts with Mixing Machine easily.Then there is the resonance point of an about 1Hz and (5～a 10) Hz usually in the dewatering machine system.When dehydration starts, need make dehydration barrel quicken rotation, cross this two resonance points as early as possible, avoid the generation of resonating, but too high acceleration make easily irregular compiling of equally distributed clothing cause the center of gravity imbalance, aggravation vibration and noise.On the other hand, the washing machine system moment of inertia of washing machine is little, bigger friction resistive torque is but arranged, and at most of speed interval substantially constant, only the time near maximum speed, clothing is fully stirred to disengaging with Mixing Machine in the water, just the further square fluid resistive torque that is directly proportional of stack and speed; Dewatering machine system friction resistive torque is little, and bigger moment of inertia is but arranged, and motor needs suitable torque in start-up course, could drive described system and reach suitable acceleration in start-up course.Prior art fails suitably to use the start-up course of frequency changing AC speed changing technical finesse washing machine, and normally finishes under a certain fixing frequency and voltage each time and start, so that performance and efficient are still not as people's will.
Summary of the invention
Technical problem to be solved by this invention is, proposes the washing machine that a kind of frequency changing AC speed changing drives, and makes the operation characteristic of frequency changing AC speed changing technology in conjunction with washing machine, further improves performance and efficient.
The technical scheme that the present invention solve the technical problem is, the washing machine that a kind of frequency changing AC speed changing drives, and comprising: the washing machine system that just changes-stop-reverse-stop reversible rotation repeatedly is or/and the dewatering machine system of unidirectional rotation; To the washing machine system or/and the transmission mechanism of dewatering machine system output revolving force; Drive the asynchronous motor of described transmission mechanism; Output frequency F can be in harmonious proportion the adjustable regulated power supply of voltage U and power to described asynchronous motor; It is characterized in that: the reversible rotation of described washing machine system or/and the unidirectional rotation of dewatering machine system each from zero startup overall process or part process to maximum speed, the frequency F of regulated power supply output is the increasing function of time T, voltage U is the increasing function of frequency F.
The one section not too wide higher efficient of revolutional slip scope performance, the synchronizing frequency of this scope and its running is irrelevant substantially usually for asynchronous motor.In each zero certainly start-up course to maximum speed, control frequency of supply F is the increasing function of time T, the synchronizing frequency of asynchronous motor running is the increasing function of time T, asynchronous motor promptly may operate at the little revolutional slip scope of change when its rotating speed raises, especially operate in the higher revolutional slip scope of efficient; Designing output voltage U simultaneously is the increasing function of output frequency F, makes magnetic flux not because of the increase of output frequency F reduces, and with the more constant torque of maintenance, thereby obtains suitable startability, has especially improved the efficient of motor in start-up course.Because the start-up course of washing machine accounts for very big ratio of whole service time, uses the design dexterously, can be energy-conservation significantly and improve noise and vibration.
It further designs is that described frequency F is that the increasing function of time T is following linear function:
F＝AT+B
Described voltage U is that the increasing function of frequency F is following linear function:
U＝CF+D
In the formula: A, B, C, D are constant.
The design of this linear function can make motor keep more constant magnetic flux, the i.e. more constant torque of output, it acts on the certain resistive torque of washing machine system of washing machine or/and the certain moment of inertia of dewatering machine system can produce more suitable even accelerator.
Can also design in the part process that starts, constant A be zero simultaneously non-vanishing the or non-vanishing while B of A of B be zero, or/and constant C be zero simultaneously non-vanishing the or non-vanishing while D of C of D be zero, thereby realize the better multistage raising speed of performance.
For washing machine with uneven measuring ability, when dewatering machine system start-up, at first C gets less value usually, makes it with less acceleration running, avoid making original more equally distributed clothing to compile brokenly and cause the center of gravity imbalance, so that aggravate the vibration and the noise of washing machine.If uneven checkout gear moves and causes shutting down in this start-up course, when restarting, C promptly changes into and gets bigger value, makes dehydration barrel quicken rotation, crosses described two resonance points as early as possible, avoids the generation of resonating.
Technical scheme of the present invention and specific design are excavated the ability of the intrinsic regulated power supply of variable-frequency washing machine, and all can realize by the software of adjusting prior art, increase under the condition of cost need not, and have obtained beyond thought result.
Description of drawings
The following drawings is used to illustrate the specific embodiment of the present invention.
Fig. 1 is the structural representation of the complete machine of embodiment of the invention single container washing and extracting machine;
Fig. 2 is the circuit block diagram of embodiment of the invention single container washing and extracting machine;
Fig. 3 is the electric motor drive system circuit block diagram of embodiment of the invention single container washing and extracting machine;
Fig. 4 is the washing running electric voltage frequency control flow chart of embodiment of the invention single container washing and extracting machine;
Fig. 5 is the dehydration running electric voltage frequency control flow chart of embodiment of the invention single container washing and extracting machine.
Embodiment
The complete machine structure of embodiment of the invention single container washing and extracting machine as shown in Figure 1.In the outer case 1 on being arranged at base by suspension rod 2 steel ladle 3 that can be hung with freely swinging, in steel ladle 3, can be provided with the dehydration washing trough 5 that the bottom is taken back changes blender 4 freely to rotate, motor 6 and the tractor draining valve 13 that drives blender 4 or dehydration washing trough 5 through speed-reducing clutch 7 is installed in the bottom of steel ladle 3, the top of outer case 1 and steel ladle 3 is equipped with top cover 9, but the cover 10 of freely openable is housed, level sensor 14 on the top cover 9, the cyclelog 12 and the entering water electromagnetic valve 8 that receive transducing signal and electrical equipment such as motor 6 are controlled are installed within the washing machine cover lid 9.Safety switch 11 is set in the outer case 1, and its activation lever is between outer case 1 and steel ladle 3.When being inclined to a certain degree, steel ladle 3 can make the contacting of safety switch 11.By with the structure of activation lever interlock, safety switch 11 is monitored the keying state of cover 10 simultaneously.Dehydration washing trough drives the centrifugal force that the clothing rotation produces and dewaters, the duration of runs about 4min, about 20s of accelerating time, about 900 rev/mins of stabilized (steady-state) speed; Blender 4 is just changeing 3s-repeatedly and is stopping the reversible operation that 1s-counter-rotating 3s-stops 1s, about 0.9s of the accelerating time of forward or reverse, about 150 rev/mins of stabilized (steady-state) speed.More than be described as the typical structure and the working condition of prior art full-automatic pulsator washing machine.The typical structure of prior art stirring type fully-automatic washing machine also roughly the same, just the pitch time of reversible operation is faster.
Fig. 2 is to be the circuit block diagram of the washing machine of frequency conversion drive to machine design shown in Figure 1.Cyclelog 12 comprises a single-chip microcomputer 15 (model is TMP86C846) and drive circuit 16.Drive circuit 16 comprises one by the inverter circuit of one group of I/O mouth control of single-chip microcomputer 15 with triggered 2 road bidirectional thyristors of control by 2 I/O mouths of single-chip microcomputer 15.Inverter circuit controlling and driving motor 6, as shown in Figure 3.The output that the output of the 1 road bidirectional thyristor connects entering water electromagnetic valve 8, the 2 road bidirectional thyristors connects tractor draining valve 13.Mode selector switches 17 such as washing, rinsing and dehydration, level sensor 14 is connected 3 I/O mouths of single-chip microcomputer 15 with the output of safety switch 11 grades.
As shown in Figure 3, from the AC power 111 of the 220V50HZ of electrical network be connected in its output and the current rectifying and wave filtering circuit 112 that AC rectification is transformed into direct voltage is constituted DC power supply 113; Output in DC power supply connects inverter circuit 114.Output at inverter circuit 114 is connecting motor 6.Inverter circuit 114 connects single-chip microcomputer 15, and controlled by it.This is the control device of typical A C-DC-AC indirect conversion mode, but is not limited thereto, and also can be the control device of not establishing the AC-AC Direct Transform mode of current rectifying and wave filtering circuit.Current rectifying and wave filtering circuit 112 comprises: the current rectifying and wave filtering circuit of the positive supply of being made up of diode D1 and capacitor C1; The current rectifying and wave filtering circuit of the negative supply of forming by diode D2 and capacitor C2.The zero-potential point of the current rectifying and wave filtering circuit of two groups of power supplys links to each other with an output line (being generally the neutral line) of power supply 111.This is the double half-wave rectification filter circuit.But be not limited to this, when needs are up to the variable frequency power supply of 2 times or 0.5 times line voltages, can use all-wave and/or voltage multiplying rectifier, and the negative and positive dual power filter circuit of single capacitor filter circuit or the output of two capacitances in series central point.Inverter circuit 114 has two hot side unit (each drive circuit K1a that is being connected with its input of switch element V1a, V1b, the combination of K1b), with two low potential side unit (each drive circuit K2a that is being connected with its input of switch element V2a, V2b, the combination of K2b).The emitter and collector of switch element V1a, V1b, V2a and V2b respectively is parallel with sustained diode 1a, D1b, D2a and D2b; But being not limited to this, also can be in parallel or/and the protective circuit of connect suitable resistance, electric capacity, inductance and semiconductor device or other pressure cell composition.Above-mentioned switch element can use the module that comprises 4 or 2 IGBT, perhaps discrete IGBT element; Also can use the power component except IGBT, for example power-type MOSFET, GTR (BJT) and GTO etc.In addition, also can be the integrated power module that above-mentioned all unit add protective circuit encapsulation one, as IPM etc.Inverter circuit 114 is two half-wave Unit 4, per two unit are one group, under the control of single-chip microcomputer 15, DC power supply is modulated to a common port, 1/6 cycle of the time lag two-phase power supply identical with amplitude: switch element V1a, V2a form one group of two half-wave inverter circuit, form the voltage of common port C to lead-out terminal A
u
CA＝U
msinωt：
Switch element V1b, V2b form the two half-wave inverter circuits of another group, form the voltage of common port C to lead-out terminal B
u
CB＝U
msin(ωt+π/3)。
As a result, lead-out terminal A and B and common port C export three-phase symmetric voltage according to the order of terminal:
u
AB＝U
msin(ωt+2π/3)；
u
BC＝U
msin(ωt-2π/3)；
u
CA＝U
msinωt。
Design according to the variable-frequency washing machine that adopts the prior art AC variable-frequency speed regulation system, software design in the present embodiment single-chip microcomputer 15 generator of SPWM of SVPWM or other optimization, according to washing machine service performance required intrinsic setting and the dynamically requirement of adjustment, frequency, voltage and the phase place of 114 outputs of control inverter circuit; Single-chip microcomputer 15 inner can being provided with the periphery are present embodiment circuit protection, control and electromagnetic compatibility required peripheral circuit and element; The software of single-chip microcomputer 15 also comprises washing, rinsing and dehydration supervisor that present embodiment carries out according to conventional washer and processing to relevant sensing and controlled function.Software in the present embodiment single-chip microcomputer 15 with respect to the improvement of prior art variable-frequency washing machine mainly is:
(1) each forward or reverse in washing and rinsing program, frequency F that inverter circuit 114 is exported and voltage U by single voltage 220V and 50Hz setting changing for to begin to set from each forward or reverse with minor function by time T:
As 0≤T≤0.1 F=100T, U=5F;
As 0.1≤T≤0.9 F=50T+5, U=4F+20;
As 0.9≤T≤3 F=50, U=220;
The unit of each variable: T-s in the formula, F-Hz, U-V; Down together.
As can be seen, the output of inverter circuit 114 is at the 1st section of function (0≤T≤0.1), frequency F and voltage U each according to the bigger linear function of a slope rapidly increase to a lower value (F=10, U=50); Then at the 2nd section of function (0.1≤T≤0.9), each rises to frequency F and voltage U set point according to the less linear function of a slope (F=50 U=220), finishes start-up course; Then at the 3rd section of function (0.9≤T≤3), frequency F and voltage remain set point (F=50, U=220), system's constant speed running finished until this forward or reverse time.
Above control flow is referring to Fig. 4.This subprogram begins promptly to enter step 101 pair T zero setting and picks up counting, situation in step 102 pair T timing is handled: the result is successively in step 103～104, implement the 1st section of above-mentioned function, in step 105～106, implement the 2nd section of above-mentioned function, in step 107～108, implement the 3rd section of above-mentioned function, end of subroutine is returned.
(2) in the lasting each time energising of dehydration procedure, the frequency F of inverter circuit 114 outputs and voltage U are by single voltage 220V, and the 50Hz setting changing is set for the function that begins following the 1st mode by time T self-starting:
As 0≤T≤20 F=2T+10, U=4F+20;
As 20≤T≤240 F=50, U=220.
As can be seen, the output frequency F of inverter circuit 114 and voltage U rise to rated value (F=50 at the straight line of function the 1st section (0≤T≤20) according to certain slope, U=220), the rotating speed of system also rises to rated value with certain acceleration, finishes start-up course; At the 2nd section of function (20≤T≤240), frequency F and voltage remain rated value (F=50 U=220), make system with rated value constant speed running, finishes until dewatering time.
If in above-mentioned dehydration start-up course, safety switch 11 actions then change into by the function of following the 2nd mode and setting:
As 0≤T≤1 F=2T+10, U=5F+2;
As 1≤T≤8 F=2T+10, U=4F+14;
As 8≤T≤11 F=2T+10, U=5F-12;
As 11≤T≤20 F=2T+10, U=4F+20;
As 20≤T≤240 F=50, U=220.
As can be seen, the output frequency F of inverter circuit 114 all rises according to the straight line of same slope the 1st section to the 4th section of function, reach rated value (F=50) until at last, voltage U rapidly increases to a lower value (U=62) at function the 1st section (0≤T≤1) according to the bigger straight line of a slope, the rotating speed of system is risen with higher acceleration, cross the 1st resonance point fast; Voltage U rises to about rated value half (U=118) at function the 2nd section (1≤T≤8) according to the less straight line of a slope, the rotating speed of system is risen, near the 2nd resonance point with lower acceleration; Voltage U rises to 2/3 (U=148) of about rated value at function the 3rd section (8≤T≤11) according to the straight line of the 1st section same slope of and function, and the rotating speed of system is risen with higher acceleration, crosses the 2nd resonance point fast; Voltage U rises to rated value (U=220) at function the 4th section (11≤T≤20) according to the straight line of the 2nd section same slope of and function, and the rotating speed of system rises to rated value with lower acceleration, finishes start-up course; At the 5th section of function (20≤T≤240), frequency F and voltage remain rated value (F=50 U=220), make system with rated value constant speed running, finishes until dewatering time.
If in above-mentioned dehydration start-up course, safety switch 11 still moves, and changes into by the function of following the 3rd mode setting:
As 0≤T≤12 F=4T+2, U=5F;
As 12＜T≤240 F=45, U=180;
As can be seen, the output frequency F of inverter circuit 114 and voltage U all rapidly increase to higher set point according to the bigger straight line of a slope for the 1st section at function, and the rotating speed of system is risen with higher acceleration, reach high rotational speed fast; The 2nd section of function, frequency F and voltage U remain a value that decreases, and make system with a rotating speed constant speed running that decreases, so that reduce the vibrations that system's imbalance of not corrected causes, finish until dewatering time.This design helps avoiding safety switch 11 actions in the accelerator that system's imbalance of not corrected causes.
Above control flow is referring to Fig. 5.This subprogram begins promptly to enter step 201, at any time the variable K situation of record security switch 11 actions is handled.Program begins, and safety switch 11 did not move, and K zero setting so at first implement the function of above-mentioned the 1st mode along step 210～215, is returned until end.If safety switch 11 actions therebetween, K is designated as 1, changes the function of implementing above-mentioned the 2nd mode along step 220～231 immediately into, returns until end.If safety switch 11 moves once more therebetween, K is designated as 2, changes the function of implementing above-mentioned the 3rd mode along step 240～245 immediately into, returns until end.In the step of each mode, all at first to T zero setting and pick up counting, then the situation of T timing is handled: the result implements each section (can with reference to the explanation of figure 4) of function successively in later step.
In addition, the slope over 10 that midway has that can also design in start-up course is zero linear function, make the dehydration rotary system to turn round a period of time than the low velocity constant speed, eliminating speed with suitable reduction cleaning solution, avoid producing the problem of foam adhesion, also help reducing vibrations and noise, even can substitute traditional program of between being provided with before the continuous dehydration, taking off.For example, described function is divided into 3 sections by following:
As 0≤T≤T1 F=A1*T+B1, U=C1*F+D1;
As T1≤T≤T2 F=B2, U=D2;
As T2≤T≤T3 F=A3*T+B3, U=C3*F+D3;
Perhaps, be divided into 4 sections by following:
As 0≤T≤T1 F=A1*T, U=C1*F;
As T1≤T≤T2 F=A2*T+B2, U=C2*F+D2;
As T2≤T≤T3 F=B3, U=D3;
As T3≤T≤T4 F=A4*T+B4, U=C4*F+D4;
One section intercept that back one example has increased beginning is zero linear function, is the particular design at the intrinsic program of some special-purpose single-chip microcomputers.
The speed designs value of described again constant speed running a period of time should between the resonant speed n1 of the unidirectional rotation of dewatering machine system (about 60r/m) and n2 (about 300～600r/m), resonate avoiding.Can (be generally 2 during belt transmission according to the number of pole-pairs p of asynchronous motor, directly be generally 3 during transmission) and the revolutional slip s (motor of 150～250W is generally 0.1～0.2) during peak efficiency and motor reel to the gearratio i of dehydration washing trough (during belt transmission about 3/2, be 1 during transmission directly), be following relation for the described constant of last example design:
n1＜(A1×T1+B1)(1-s)/p/i＜n2
For the back described constant of one example design is following relation:
n1＜(A2×T2+B2)(1-s)/p/i＜n2
More steady in order to dewater, with further performance and the efficient improved, described constant speed running is that slope is that zero linear function can also be set up 1～3 section again with reference to above-mentioned way, for example increases by 1 section again between n1 and n2, and increase by one section between n2 and maximum speed.
The design parameter of voltage in the present embodiment, frequency and time is based on the family expenses full-automatic pulsator washing machine of intermediate size.Washing machine for different capabilities and pattern, its design parameter can calculate the dynamics of (referring to " the middle-size and small-size threephase motor electromagnetic computation program " of the 1st Shanghai Electric Appliance Science Inst., Ministry of Machinery, Shanghai establishment in 1971 and " the miniature three-phase single-phase motor Electromagnetic Design Program " of Guangzhou Inst. of Electric Equipment Science's nineteen eighty-two establishment) and washing machine mechanical system by the electromagnetism to asynchronous motor and/or hydrodynamic characteristic calculates or experiment obtains (referring to engineering master professional degree of Tsing-Hua University paper " a kind of design of frequency conversion drive washing machine controller ", Zhang Jianming, in June, 2004).
The coefficient of each function in the present embodiment is a fixed value at each section, also can be designed as dynamically in fact, transition gradually, comprises continuous transition or segmentation transition, to satisfy the requirement of corresponding control curve.Can obtain specifically to control numerical value by experiment, be organized in the software of single-chip microcomputer 15.
Claims (10)
1, a kind of washing machine of frequency changing AC speed changing driving, comprising: the washing machine system that just change-stop-reverse-is stopping reversible rotation repeatedly is or/and the dewatering machine system of unidirectional rotation; To the washing machine system or/and the transmission mechanism of dewatering machine system output revolving force; Drive the asynchronous motor of described transmission mechanism; Output frequency F can be in harmonious proportion the adjustable regulated power supply of voltage U and power to described asynchronous motor; It is characterized in that: the reversible rotation of described washing machine system is or/and the overall process or the part process of each startup to maximum speed from zero of the unidirectional rotation of dewatering machine system, the frequency F of regulated power supply output is the increasing function of time T, or/and voltage U is the increasing function of frequency F.
2, according to the described washing machine of claim 1, it is characterized in that: described frequency F is that the increasing function of time T is following linear function:
F＝AT+B
Or/and described voltage U is the increasing function of frequency F is following linear function:
U＝CF+D
In the formula: A, B, C, D are constant.
3, according to the described washing machine of claim 2, it is characterized in that: the reversible rotation of described washing machine system is or/and the part process of each startup to maximum speed from zero of the unidirectional rotation of dewatering machine system, constant A be zero simultaneously non-vanishing the or non-vanishing while B of A of B be zero, or/and constant C be zero simultaneously non-vanishing the or non-vanishing while D of C of D be zero.
4, according to claim 2 or the described washing machine of claim 3, it is characterized in that: also comprise the uneven checkout gear of dehydration; In described dewatering machine system start-up overall process,, when restarting, the C value that starts overall process or part process is increased if uneven checkout gear moves and causes shutting down.
5, according to the described washing machine of claim 3, it is characterized in that: the overall process of each startup to maximum speed of the unidirectional rotation of described dewatering machine system from zero, described function is divided into 3 sections by following:
As 0≤T≤T1 F=A1 * T+B1, U=C1 * F+D1;
As T1≤T≤T2 F=B2, U=D2;
As T2≤T≤T3 F=A3 * T+B3, U=C3 * F+D3;
In the formula: T1, T2, T3, A1, A3, B1, B2, B3, C1, C3, D1, D2, D3 are constant.
6, according to the described washing machine of claim 5, it is characterized in that: the unidirectional rotation of described dewatering machine system has resonant speed n1 and n2, revolutional slip s when described asynchronous motor has number of pole-pairs p and peak efficiency, described transmission mechanism has gearratio i, with described constant following relation is arranged:
n1＜(A1×T1+B1)(1-s)/p/i＜n2。
7, according to the described washing machine of claim 5, it is characterized in that: also comprise the uneven checkout gear of dehydration; In described dewatering machine system start-up overall process,, when restarting, make C1 or/and C3 increases if uneven checkout gear moves and causes shutting down.
8, according to the described washing machine of claim 3, it is characterized in that: the overall process of each startup to maximum speed of the unidirectional rotation of described dewatering machine system from zero, described function is divided into 4 sections by following:
As 0≤T≤T1 F=A1 * T, U=C1 * F;
As T1≤T≤T2 F=A2 * T+B2, U=C2 * F+D2;
As T2≤T≤T3 F=B3, U=D3;
As T3≤T≤T4 F=A4 * T+B4, U=C4 * F+D4;
In the formula: T1, T2, T3, T4, A1, A2, A4, B2, B3, B4, C1, C2, C4, D2, D3, D4 are constant.
9, according to the described washing machine of claim 8, it is characterized in that: the unidirectional rotation of described dewatering machine system has resonant speed n1 and n2, revolutional slip s when described asynchronous motor has number of pole-pairs p and peak efficiency, described transmission mechanism has gearratio i, with described constant following relation is arranged:
n1＜(A2×T2+B2)(1-s)/p/i＜n2。
10, according to the described washing machine of claim 8, it is characterized in that: also comprise the uneven checkout gear of dehydration; In described dewatering machine system start-up overall process,, when restarting, make C2 or/and C4 increases if uneven checkout gear moves and causes shutting down.
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| CN101860286A (en) * | 2010-07-06 | 2010-10-13 | 中国北车股份有限公司大连电力牵引研发中心 | Method for providing given frequency in motor starting phase |
| CN104158465A (en) * | 2014-07-31 | 2014-11-19 | 松下家电研究开发（杭州）有限公司 | Motor controlling method, abnormal detecting method for motor belt of washing machine and washing machine |
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| CN107251403A (en) * | 2015-02-27 | 2017-10-13 | 罗伯特·博世有限公司 | Method for the control device of asynchronous machine and for running asynchronous machine |
| CN108998922A (en) * | 2017-06-06 | 2018-12-14 | 松下家电研究开发（杭州）有限公司 | A kind of motor's for washing machine starting control method |
| CN111041770A (en) * | 2019-12-05 | 2020-04-21 | 无锡飞翎电子有限公司 | Clothes treatment equipment, control method and device thereof, and readable storage medium |
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| TW397875B (en) * | 1996-08-21 | 2000-07-11 | Hitachi Ltd | Fully automatic washing machine |
| JP3357658B2 (en) * | 2000-10-10 | 2002-12-16 | 株式会社日立製作所 | Fully automatic washing and drying machine |
| CN1164824C (en) * | 2001-06-27 | 2004-09-01 | 金羚电器有限公司 | Frequency changing triphase driven washing machine |
| CN2520340Y (en) * | 2001-11-27 | 2002-11-13 | 金羚电器有限公司 | Frequency-changing three-phase driven domestic electric washer |
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| CN101860286A (en) * | 2010-07-06 | 2010-10-13 | 中国北车股份有限公司大连电力牵引研发中心 | Method for providing given frequency in motor starting phase |
| CN101860286B (en) * | 2010-07-06 | 2012-01-25 | 中国北车股份有限公司大连电力牵引研发中心 | Method for providing given frequency in motor starting phase |
| CN104158465A (en) * | 2014-07-31 | 2014-11-19 | 松下家电研究开发（杭州）有限公司 | Motor controlling method, abnormal detecting method for motor belt of washing machine and washing machine |
| CN107251403A (en) * | 2015-02-27 | 2017-10-13 | 罗伯特·博世有限公司 | Method for the control device of asynchronous machine and for running asynchronous machine |
| CN107251403B (en) * | 2015-02-27 | 2019-10-01 | 罗伯特·博世有限公司 | Method for the control equipment of asynchronous machine and for running asynchronous machine |
| US10432126B2 (en) | 2015-02-27 | 2019-10-01 | Robert Bosch Gmbh | Control device for an asynchronous machine and method for operating an asynchronous machine |
| CN106487315A (en) * | 2016-10-17 | 2017-03-08 | 南天日 | A kind of speed regulating method of alternating current generator |
| CN108998922A (en) * | 2017-06-06 | 2018-12-14 | 松下家电研究开发（杭州）有限公司 | A kind of motor's for washing machine starting control method |
| CN108998922B (en) * | 2017-06-06 | 2020-12-11 | 松下家电研究开发（杭州）有限公司 | Washing machine motor starting control method |
| CN111041770A (en) * | 2019-12-05 | 2020-04-21 | 无锡飞翎电子有限公司 | Clothes treatment equipment, control method and device thereof, and readable storage medium |
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| CN100440721C (en) | 2008-12-03 |
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