CN1756063A - Operation controlling method for brushless DC motor of washing machine - Google Patents
Operation controlling method for brushless DC motor of washing machine Download PDFInfo
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- CN1756063A CN1756063A CNA2004100811192A CN200410081119A CN1756063A CN 1756063 A CN1756063 A CN 1756063A CN A2004100811192 A CNA2004100811192 A CN A2004100811192A CN 200410081119 A CN200410081119 A CN 200410081119A CN 1756063 A CN1756063 A CN 1756063A
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Abstract
The invention relates to a operation control method applying the brushless DC motor of washer, comprising following steps: the first step that comparing the direct current connecting voltage and the speed with the first reference voltage and the first reference speed, and according to the compared result judging the blocking-up mode of input current; the second step that according to aforementioned judged result, setting the input-cut relative voltage and the current limited value of the current rate of d and q axis; the third step that according to the value of the direct current connecting voltage in the second step, processing the control; and the fourth step that if said direct current connecting voltage is more than the second reference voltage, judging it as instant power off to input the power source again to be recovered into the third step, and while said direct current connecting voltage is less than the second reference voltage, closing the impulse-width modulation gate to control the supply of current. The invention can prevent the instant decrease of power source voltage when cutting the input current and the speed increase when inputting the power source again after the instant power off, to process the safe dehydration.
Description
Technical field
The present invention relates to a kind of progress control method of motor, particularly relate to and a kind ofly when washing machine cuts off the power supply for some reason, can prevent drive corruption when dewatering at a high speed, thereby be suitable for the progress control method (DRIVE CONTROL METHODFOR BLDC MOTOR IN USING WASHING MACHINE) of practical suitable washing machine brushless direct-current (BLDC) motor more.
Background technology
Seeing also shown in Figure 1ly, is the unit figure of brshless DC motor of the prior art (BLDC) motor driven systems.
As shown in Figure 1, the brshless DC motor of above-mentioned prior art (BLDC) motor driven systems, it comprises: alternating current AC is carried out rectification and level and smooth rectification and partes glabra 11; Add the pole-changing portion 12 of brshless DC motor 13 to above-mentioned rectification and through level and smooth voltage or electric current with the control spinner velocity with variable frequency and amplitude variable; To adding that voltage and current on the above-mentioned brshless DC motor 13 detects to and to the seat of detecting gyrator and the microcomputer 14 that rotary speed is controlled; And adjust and the pulse duration adjustment part 15 that above-mentioned pole-changing portion 12 carries out on/off (ON/OFF) is formed output (exerting oneself) waveform of the control signal of above-mentioned microcomputer 14 is wide.
Seeing also shown in Figure 2ly, is the unit block diagram that electric current among Fig. 1 and speed control system constitute.
As shown in Figure 2, the input speed command value compares with existing speed estimating value ω e, by the current instruction value of P1 controller as the q axle.
In addition, above-mentioned q shaft current command value is formed by present q shaft current value Iq feedback, also have for q shaft current command value streaming current, present q shaft voltage Vq feedback forms q shaft voltage command value, and at this moment q shaft voltage command value is used as the magnitude of voltage that pulse-width signal forms with d shaft voltage command value.
According to existing speed calculation value ω e,, calculate d shaft current command value for the operation of weak boundary magnetic.
At this moment, the situation d shaft current value Id of low speed is ' 0 ', but can fully form the q shaft current, so the d shaft current keeps ' 0 ' as command value, but in high speed, can make the weak boundary magnetic operation that the d axle also can streaming current, make in the command value of d shaft current '.
Then, for d shaft current command value is controlled, d shaft voltage value Vd feeds back and forms d shaft voltage command value.
The q shaft voltage command value utilization of making for the d shaft voltage command value of above-mentioned formation and speed are controlled constitutes the voltage vector on the space, does pulse-width modulation (PWM) signal.
The input of such voltage can change the size of electric current again, the position of the magnitude of voltage of change value by this electric current and pulse-width modulation output and be input to electromotive force reckoning portion as DR position with follow the trail of electromotive force (emf) and use.
In addition, the speed calculation value ω e that uses in the speed control utilizes the position reckoning value that draws in position and the electromotive force reckoning portion to form.
Seeing also shown in Figure 3ly, is the operational flow diagram of progress control method of the brshless DC motor of existing traditional washing machine.Should have the progress control method of the brshless DC motor of traditional washing machine now, it may further comprise the steps:
At first, be that the input power supply connected voltage every 0.001 second monitoring direct current after 1 second, judge whether its direct current connects voltage is the following stage SP1 of 180v.
Through above-mentioned judged result, when above-mentioned direct current connects voltage is that 180v is when following, regard as the interruption of input power supply, the d shaft current takes advantage of the stage SP2 of 1/4 value to store, in addition in order to prevent that the urgency that direct current connects voltage from subtracting the stage SP3 of the output of positive opening pulse-width modulation, 20msec carries out the stage SP4 of surplus energy rotation by force, promptly the control direct current connects voltage 300v degree between 20msec, and d axle and q shaft current use certain gradient of carrying out ratio with speed to reduce.
Then, when the pressure output time of pulse-width modulation surpasses 20msec, detect actual speed, its actual speed is the stage SP5 and the SP6 of 400rpm storage d shaft current and q shaft current when above.The stage SP7 that the gradient of the maximal rate ratio of its d shaft current and q axle (each is to 16msec, and 25msec carries out 1rpm) reduces.
In addition, above-mentioned actual speed is closed the stage SP8 after pulse-width modulation is exported when 400rpm is following, cuts off the relevant whole parameters of supervision for input voltage and carries out initialized stage SP9.
Moreover actual speed was cut off the relevant whole parameters of monitoring to out-put supply and is carried out the cut-out that initialized method is dealt with the input power supply in ' 0 ' time.
But, above-mentioned existing traditional out-put supply cuts off relevant game method, cuts off the input power supply when washing machine is dewatered at a high speed, comprises direct current and connects the suitable ripple of voltage, the life-span of part takes place to shorten in this situation continued, and system is produced serious problem.
This shows that the progress control method of above-mentioned existing washing machine brshless DC motor still has many defectives, and demands urgently further being improved.For the defective of the progress control method that solves existing washing machine brshless DC motor, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but does not see always that for a long time suitable design finished by development, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the existing defective of progress control method of above-mentioned existing washing machine brshless DC motor, the inventor is based on being engaged in this type of product design and making abundant for many years practical experience and professional knowledge, actively studied innovation, in the hope of founding a kind of progress control method of suitable washing machine brshless DC motor newly, can improve the progress control method of general existing washing machine brshless DC motor, make it have more practicality.Through constantly research, design, and after studying repeatedly and improving, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective of the progress control method existence of existing washing machine brshless DC motor, and a kind of progress control method of new suitable washing machine brshless DC motor is provided, technical problem to be solved is to make it when cutting off the input power supply, the urgency that can prevent supply voltage subtracts and the speed that takes place suddenly when reclosing power supply behind the instantaneous power failure increases, and can safety dewater, thereby be suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.The progress control method of a kind of suitable washing machine brshless DC motor that proposes according to the present invention, it may further comprise the steps: during high speed dewatering, the monitoring direct current connects voltage and speed, direct current is connected voltage and speed and first reference voltage and first reference speed compare, judge whether it is the phase I of input voltage lockout mode according to its result; When above-mentioned judged result is the input voltage lockout mode, become certain voltage, set the input that d axle and q shaft current ratio are controlled, cut off the relevant voltage and the second stage of current limit value in order to make direct current connect voltage; For the urgency that prevents supply voltage subtracts, electric current to d axle and q axle reduces with certain gradient, if existing speed is higher than second reference speed, set with input voltage and cut off relevant voltage, electric current and controlled variable, reduce the phase III that direct current connects voltage; And if above-mentioned direct current connects voltage greater than second reference voltage, regard as the power failure of moment, re-enter the above-mentioned phase III of power up, if above-mentioned direct current connects voltage less than second reference voltage, in order to limit the supply of electric current, close the quadravalence section of pulse-width modulation (PWM) door.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The progress control method of aforesaid suitable washing machine brshless DC motor, the wherein said phase I comprises that existing speed is higher than first reference speed, when direct current connection voltage is lower than first reference voltage, is judged to be the decision stage of input dump pattern.
The progress control method of aforesaid suitable washing machine brshless DC motor when it comprises existing speed less than second reference speed, in order to limit the supply of electric current, is closed the stage of pulse-width modulation (PWM) door.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows:
The present invention proposes a kind of progress control method of suitable washing machine brshless DC motor, it may further comprise the steps: when high speed dewatering, the supervision direct current connects voltage, direct current is connected voltage and speed and first reference voltage and first reference speed compare, judge whether it is the phase I of blocking mode according to its result; According to above-mentioned judged result, when being the input voltage blocking mode, become certain voltage, the input of control d axle and q shaft current, voltage and current limit value that blocking-up is relevant, the second stage of setting in order to make direct current connect voltage; For the urgency that prevents supply voltage subtracts, the electric current of d axle and q axle reduces with certain gradient, big as existing speed ratio second reference speed, input voltage is cut off relevant voltage and current and controlled variable is set, reduce the phase III of direct voltage size; And above-mentioned direct current to connect voltage ratio second benchmark big, drop into the power supply that moment can discern power failure again, return to the phase III, little if above-mentioned direct current connects voltage ratio second reference voltage, close the quadravalence section of pulse-width modulation door for the supply that limits electric current.
Via as can be known above-mentioned, the invention relates to a kind of progress control method of suitable washing machine brshless DC motor, it comprises the following step: when high speed dewatering, direct current connection voltage and speed are monitored, direct current is connected voltage and speed, compare with first reference voltage and first reference speed, judge the phase I of the blocking mode of input electricity according to its result; Above-mentioned judged result when input voltage is blocking mode, connects voltage-regulation to direct current and becomes certain voltage, and the second stage of associated voltage and current limit value is cut off in the input of setting d axle and q shaft current ratio; Subtract in order to prevent that supply voltage is anxious, electric current to d axle and q axle reduces with certain gradient, when if existing speed ratio second reference speed is high, set and relevant voltage and current and the controlled variable of cut-out input voltage, reduce the phase III that direct current connects the size of voltage; And if above-mentioned direct current connects voltage greater than second reference voltage, regard as the power failure of moment and import power up once more to the phase III, if it is low that above-mentioned direct current connects voltage ratio second reference voltage,, close the quadravalence section of pulse-width modulation door for the supply of Control current.The present invention is when cutting off the input power supply, and very fast reduce and when importing power supply once more after the power failure of moment that has prevented supply voltage takes place suddenly that speed increases, thereby can carry out safety dehydration.
By technique scheme, the progress control method that the present invention is suitable for the washing machine brshless DC motor has following advantage at least:
As mentioned above, the present invention has contingent cut-out input power supply in the high speed dewatering that prevents washing machine and the change rapidly of the power supply, voltage, electric current and the speed that cause because of instantaneous power failure, and can remove the ripple that direct current connects voltage, prevent the damage of parts, improve the effect of security of system.
Therefore, cut-out input power supply that the present invention can prevent to take place in the high speed dewatering of washing machine and cause that power supply, voltage and electric current also have the change rapidly of speed, thereby can prevent the damage of locking system because of instantaneous power failure.
In sum, the progress control method of the suitable washing machine brshless DC motor that the present invention is special, when cutting off the input power supply, the urgency that can prevent supply voltage subtracts and the speed that takes place suddenly when dropping into power supply again behind the instantaneous power failure increases, thereby can dewater safely.It has above-mentioned many advantages and practical value, and in class methods, do not see have similar design to publish or use and really genus innovation, no matter it is all having bigger improvement on method or on the function, have large improvement technically, and produced handy and practical effect, and the progress control method of more existing suitable washing machine brshless DC motor has the multinomial effect of enhancement, thereby be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
Concrete grammar of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the cell schematics of brshless DC motor of the prior art (BLDC) motor driven systems.
Fig. 2 is the unit block diagram representation that electric current among Fig. 1 and speed control system constitute.
Fig. 3 is the operational flow diagram of progress control method of the brshless DC motor of existing traditional washing machine.
Fig. 4 is the operational flow diagram of the progress control method of the present invention's brshless DC motor of being suitable for washing machine.
Fig. 5 is the waveform schematic diagram that connects voltage according to direct current of the present invention.
Fig. 6 is the waveform schematic diagram that the direct current of prior art connects voltage.
11: rectification and partes glabra 12: pole-changing portion
13: brshless DC motor 14: microcomputer
15: the pulse duration adjustment part
SP1: judge whether its direct current connects voltage is the following stage of 180v
The SP2:d shaft current is taken advantage of the stage of 1/4 value
SP3: the stage of the output of positive opening pulse-width modulation
SP4: the stage of carrying out the surplus energy rotation by force
SP5, SP6: the stage that stores d shaft current and q shaft current
The stage that the gradient of the maximal rate ratio of SP7:d shaft current and q axle (each is to 16msec, and 25msec carries out 1rpm) reduces
SP8: close the stage after pulse-width modulation is exported
SP9: all parameter carries out the initialized stage
SP11: judge whether it is the phase I of input voltage lockout mode
SP12: the second stage of associated voltage and current limit value is cut off in input
SP13-SP15: reduce the phase III that direct current connects voltage Vdc size
SP16, SP17: the quadravalence section of closing the pulse-width modulation door
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, its concrete control method of progress control method, step, feature and the effect thereof of the suitable washing machine brshless DC motor that foundation the present invention is proposed, describe in detail as after.
At first, the device that progress control method was fit to of the brshless DC motor that washing machine of the present invention is suitable for is identical with prior art illustrated in figures 1 and 2.
Seeing also shown in Figure 4ly, is the operational flow diagram of the progress control method of the present invention's brshless DC motor of being suitable for washing machine.
As shown in Figure 4, the present invention is suitable for the progress control method of the brshless DC motor of washing machine, may further comprise the steps: when high speed dewatering, detect direct current and connect voltage Vdc and speed, direct current is connected voltage Vdc and speed and first reference voltage V 1 and the first reference speed W1 compare, judge whether it is the phase I SP11 of input voltage lockout mode according to its result; When above-mentioned judged result was the input voltage lockout mode, direct current connects voltage Vdc became certain voltage V2, preset proportion control d axle and q shaft current, the second stage SP12 of associated voltage and current limit value is cut off in input; Subtract in order to prevent that supply voltage is anxious, electric current to d axle and q axle reduces with certain gradient, if existing speed is higher than the second reference speed W2, set with input voltage and cut off relevant voltage and current and controlled variable, reduce the phase III SP13-SP15 that direct current connects voltage Vdc size; And if above-mentioned connection voltage Vdc is greater than second reference voltage V 2, regard as instantaneous power failure, drop into power supply again and turn back to the phase III, if above-mentioned direct current connects voltage Vdc less than second reference voltage V 2, in order to limit electric current supply, close quadravalence section SP16, the SP17 of pulse-width modulation door.
At first, direct current connection voltage Vdc and speed are detected, direct current is connected voltage Vdc and speed and first reference voltage V 1 and the first reference speed W1 to be compared, carry out judging whether it is the phase I SP11 of input voltage lockout mode according to its result, if existing speed is greater than the first reference speed W1, direct current is judged to be input dump pattern when connecting voltage Vdc less than first reference voltage V 1.
That is, connect voltage Vdc and speed, when washing machine is carried out high speed dewatering, judge whether the voltage that is input to washing machine can cut off to judge with direct current.
Above-mentioned judged result, input voltage is a lockout mode, making direct current connect voltage Vdc becomes certain voltage, sets d axle and q shaft current are carried out proportional control, carries out the voltage relevant with the input cut-out and the second stage SP12 of current limit value.
Then, subtract in order to prevent that supply voltage is anxious, carry out the electric current of d axle and q axle is reduced the phase III SP13 that direct current connects voltage Vdc size with what certain gradient reduced, if existing speed is higher than the second benchmark speed of service W2, set with input voltage and cut off relevant voltage and current and parameter, reduce phase III SP14, SP15 that direct current connects the size of voltage Vdc, when if existing speed is lower than the second reference speed W2, close the stage SP17 of pulse-width modulation door for the supply that limits electric current.
Then, above-mentioned direct current connects voltage Vdc greater than second reference voltage V 2, regard as the power failure of moment, again after dropping into power supply, repeat aforesaid operations, promptly existing speed is higher than the second reference speed W2, the setting input voltage cuts off relevant, voltage and current and controlled variable reduce phase III SP14, SP15 that direct current connects the size of voltage Vdc, close the stage SP17 of pulse-width modulation door if existing speed is lower than the second reference speed W2 in order to limit electric current supply.
In addition, if above-mentioned direct current connects voltage Vdc less than second reference voltage V 2, close quadravalence section SP16, the SP17 of pulse-width modulation door for the supply that limits electric current.
See also Fig. 5, shown in Figure 6, Fig. 5 is the waveform schematic diagram that connects voltage according to direct current of the present invention, and Fig. 6 is the waveform schematic diagram that the direct current of prior art connects voltage.Now the present invention and prior art are compared, in washing machine high speed dewatering process, when cutting off the input power supply, be detained connection voltage ripple does not take place, and can keep certain magnitude of voltage according to Fig. 5 and Fig. 6.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, but every content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (3)
1, a kind of progress control method of suitable washing machine brshless DC motor is characterized in that it may further comprise the steps:
During high speed dewatering, the monitoring direct current connects voltage and speed, direct current is connected voltage and speed and first reference voltage and first reference speed compare, and judges whether it is the phase I of input voltage lockout mode according to its result;
When above-mentioned judged result is the input voltage lockout mode, become certain voltage, set the input that d axle and q shaft current ratio are controlled, cut off the relevant voltage and the second stage of current limit value in order to make direct current connect voltage;
For the urgency that prevents supply voltage subtracts, electric current to d axle and q axle reduces with certain gradient, if existing speed is higher than second reference speed, set with input voltage and cut off relevant voltage, electric current and controlled variable, reduce the phase III that direct current connects voltage; And
If above-mentioned direct current connects voltage greater than second reference voltage, regard as the power failure of moment, re-enter the above-mentioned phase III of power up, if above-mentioned direct current connects voltage less than second reference voltage, in order to limit the supply of electric current, close the quadravalence section of pulse-width modulation (PWM) door.
2, the progress control method of suitable washing machine brshless DC motor according to claim 1, it is characterized in that the wherein said phase I comprises that existing speed is higher than first reference speed, when direct current connection voltage is lower than first reference voltage, is judged to be the decision stage of input dump pattern.
3, the progress control method of suitable washing machine brshless DC motor according to claim 1 when it is characterized in that wherein also comprising existing speed less than second reference speed, in order to limit the supply of electric current, is closed the stage of pulse-width modulation (PWM) door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100811192A CN100433532C (en) | 2004-09-30 | 2004-09-30 | Operation controlling method for brushless DC motor of washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100811192A CN100433532C (en) | 2004-09-30 | 2004-09-30 | Operation controlling method for brushless DC motor of washing machine |
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| CN1756063A true CN1756063A (en) | 2006-04-05 |
| CN100433532C CN100433532C (en) | 2008-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100811192A Expired - Fee Related CN100433532C (en) | 2004-09-30 | 2004-09-30 | Operation controlling method for brushless DC motor of washing machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694047A (en) * | 2009-02-02 | 2010-04-14 | 南京乐金熊猫电器有限公司 | Controlling means and control method for washing machine |
| CN102182044A (en) * | 2011-01-30 | 2011-09-14 | 海尔集团公司 | Floating drum fault detection method and device in washing mode of floating drum washing machine |
| WO2015154697A1 (en) * | 2014-04-11 | 2015-10-15 | 常州雷利电机科技有限公司 | Direct current brushless motor system for drain pump, and control method and control device thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6445879B1 (en) * | 1999-07-21 | 2002-09-03 | Lg Electronics Inc. | Apparatus and method for braking a washing machine |
| JP2002374700A (en) * | 2001-06-15 | 2002-12-26 | Hitachi Ltd | Permanent magnet synchronous motor drive gear and washing machine using the same |
| JP2003326086A (en) * | 2002-05-14 | 2003-11-18 | Matsushita Electric Ind Co Ltd | Washing machine |
| KR20040046211A (en) * | 2002-11-26 | 2004-06-05 | 엘지전자 주식회사 | method for controlling motor of washing machine in case of power cut off |
| KR20040047404A (en) * | 2002-11-30 | 2004-06-05 | 엘지전자 주식회사 | Method for Controlling Brushless Direct Current Direct Driver Motor for landary Machine |
-
2004
- 2004-09-30 CN CNB2004100811192A patent/CN100433532C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694047A (en) * | 2009-02-02 | 2010-04-14 | 南京乐金熊猫电器有限公司 | Controlling means and control method for washing machine |
| CN102182044A (en) * | 2011-01-30 | 2011-09-14 | 海尔集团公司 | Floating drum fault detection method and device in washing mode of floating drum washing machine |
| CN102182044B (en) * | 2011-01-30 | 2016-02-24 | 海尔集团公司 | Keg float fault detection method under a kind of float bowl-type washing of drum type washing machine pattern and device |
| WO2015154697A1 (en) * | 2014-04-11 | 2015-10-15 | 常州雷利电机科技有限公司 | Direct current brushless motor system for drain pump, and control method and control device thereof |
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| CN100433532C (en) | 2008-11-12 |
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