CN104534615A - Rotating speed adjusting method and system of motor and air conditioner - Google Patents
Rotating speed adjusting method and system of motor and air conditioner Download PDFInfo
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- CN104534615A CN104534615A CN201410709412.2A CN201410709412A CN104534615A CN 104534615 A CN104534615 A CN 104534615A CN 201410709412 A CN201410709412 A CN 201410709412A CN 104534615 A CN104534615 A CN 104534615A
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- time interval
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
Abstract
The invention provides rotating speed adjusting method and system of a motor and an air conditioner. The method comprises the steps of setting a target rotating speed for the motor of the air conditioner according to a received setting instruction; setting a plurality of time intervals according to the target rotating speed; detecting the power supply voltage of the air conditioner; connecting and disconnecting a driving circuit of a power device of the air conditioner according to the plurality of time intervals in a sequence within the following half voltage cycle after detecting that the power supply voltage is zero, so as to adjust the actual rotating speed of the motor by adjusting the effective value of the power supply voltage. According to the technical scheme, the method has the advantages that the chopping time of the power device can be dispersed into the whole voltage waveform during the stepless speed variation process, thus the vibration and noise caused by the distortion of voltage and current can be removed, the silence degree of the air conditioner in running can be improved, and as a result, the performances of the air conditioner can be improved, and the user experience is increased.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of motor speed control method, a kind of motor speed regulating system and a kind of air-conditioner.
Background technology
At present, the indoor set of air-conditioner generally adopts the alternating current asynchronous circuit of band feedback device as shown in Figure 1 to realize the function of stepless speed regulation.Its specific implementation process is as follows:
As shown in Figure 1, the stepless speed regulation control circuit of air-conditioner mainly contains following components: the drive circuit of main control chip, power supply, voltage zero-crossing detection circuit, power device, power device, motor body and speed feedback device.Described main control chip is mainly turned on and off power device by drive circuit accurately according to the zero cross signal of supply voltage; Described zero cross detection circuit, by detecting the waveform of supply voltage, for main control chip provides the moment of voltage zero-cross, is thought and to be opened or sending of cut-off signals provides starting point; Described power device and drive circuit are opened or breaking circuit according to the control command of main control chip, to modulate desirable voltage waveform, for motor provides desirable power supply; Described motor is the AC induction motor with speed feedback device.
After air-conditioner powers on, its voltage zero-crossing detection circuit carries out zero-crossing examination to the supply voltage of air-conditioner, controlled the break-make of power device and power device according to zero cross signal by the main control chip of air-conditioner, namely chopping modulation is carried out to the voltage of supply motor, the voltage of motor is under this chopping modulation, its waveform is no longer complete sinusoidal waveform, but each half-wave as shown in Figure 2 cuts the waveform of the part at T time interval, and the distortion of its electric current is also larger.Power device copped wave is more, and the voltage effective value of supply motor is less, and motor speed is lower.In theory, can realize from the speed governing in the scope of 0 to rated speed by this way, i.e. described stepless speed regulation.
When air-conditioner to need motor stabilizing in some rotating speed of target, main control chip due to air-conditioner detects the rate signal of motor immediately, when detecting that the actual speed of motor is actual and being greater than rotating speed of target, the time of power device copped wave can be increased, virtual value step-down due to voltage declines by the actual speed of motor, thus infinite approach rotating speed of target, until equal rotating speed of target.In like manner, when detecting that the actual speed of motor is less than rotating speed of target, then reduce the copped wave time.Can realize, to the closed-loop control of motor speed, motor speed being stabilized in rotating speed of target by said process.
But, the copped wave of continuous time is carried out in traditional stepless speed regulation after zero cross signal by power device, namely to the waveform copped wave of every half period once, very large to the distortion of waveform of the voltage and current being added in motor side like this, although the stable of motor speed can be realized, but can affect to the operation of motor, motor especially can be made to produce very large noise, and produce vibration or resonance etc.
Therefore, how to eliminate in stepless speed regulation process and to be distorted the vibration and noise that cause by voltage and current, become technical problem urgently to be resolved hurrily at present.
Summary of the invention
The present invention, just based on the problems referred to above, proposes a kind of new technical scheme, can eliminate and be distorted the vibration and noise that cause by voltage and current in stepless speed regulation process.
For this reason, one object of the present invention is to propose a kind of motor speed control method.
Another object of the present invention is to propose a kind of motor speed regulating system.
Another object of the present invention is to propose a kind of air-conditioner, has above-mentioned motor speed regulating system.
For achieving the above object, the embodiment of a first aspect of the present invention proposes a kind of motor speed control method, for air-conditioner, comprising: according to the setting command received, and is the motor Offered target rotating speed of described air-conditioner; According to described rotating speed of target, multiple time interval is set; Detect the supply voltage of described air-conditioner; Whenever detecting that described supply voltage is zero, in ensuing half voltage cycle, repeatedly open and disconnect the drive circuit of power device of described air-conditioner successively according to described multiple time interval, with the actual speed by regulating the virtual value of described supply voltage to regulate described motor.
According to the motor speed control method of the embodiment of the present invention, when voltage arrives zero crossing, in ensuing every half period, circulation is opened and is disconnected the drive circuit of power device, when power device disconnects, the value of voltage is zero, and the waveform namely in this time interval is cut.By carrying out repeatedly the copped wave of short time to the waveform of every half period, the voltage effective value of the motor of air-conditioner can be changed, thus regulate the rotating speed of motor further.By this technical scheme, in stepless speed regulation process, can the copped wave time of power device be dispersed in whole voltage waveform, thus can eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner runs, improve the performance of product, improve Consumer's Experience.
According to one embodiment of present invention, after the described break-make by controlling described power device regulates the actual speed of described motor, also comprise: whether the described actual speed detecting described motor is stablized constant; When determining that described actual speed is stablized constant, judge that whether described actual speed is equal with described rotating speed of target.
According to the motor speed control method of the embodiment of the present invention, when carrying out copped wave according to multiple time intervals of initial setting up to the voltage of motor, when voltage effective value tends towards stability, the actual speed of motor also tends towards stability, now, can detect actual speed, if actual speed now and rotating speed of target still have gap, can stepless speed regulation be proceeded.By this technical scheme, after actual speed is stable, can continues to judge whether it conforms to rotating speed of target, to make actual speed closest to rotating speed of target, thus obtain the operational effect of expection, improve practicality and the Consumer's Experience of stepless speed regulation process.
According to one embodiment of present invention, described judge that whether described actual speed equal with described rotating speed of target after, also comprise: when judged result be described actual speed equal with described rotating speed of target time, continue repeatedly open according to described multiple time interval successively and disconnect described drive circuit; When described judged result is described actual speed and described rotating speed of target is unequal, according to the difference of described actual speed and described rotating speed of target, adjust the size in described multiple time interval, and repeatedly open according to the described multiple time interval after adjustment and disconnect described drive circuit successively.
According to the motor speed control method of the embodiment of the present invention, if actual speed equals rotating speed of target, then can proceed stepless speed regulation according to multiple time intervals of presetting, to ensure that the voltage effective value of motor is stabilized in currency, thus further actual speed be maintained rotating speed of target.And if actual speed is not equal to rotating speed of target, then can changes the adjustment level of the voltage effective value to motor by changing multiple time interval, reaching to make the voltage effective value of motor level actual speed being maintained rotating speed of target as early as possible.By this technical scheme, after actual speed is stable, can continues to judge whether it conforms to rotating speed of target, to make actual speed closest to rotating speed of target, thus obtain the operational effect of expection, improve practicality and the Consumer's Experience of stepless speed regulation process.
According to one embodiment of present invention, the described difference according to described actual speed and described rotating speed of target, regulate the size in described multiple time interval, specifically comprise: when described actual speed is greater than described rotating speed of target, increase each time interval in described multiple time interval or arbitrary time interval; When described actual speed is less than described rotating speed of target, reduce the described each time interval in described multiple time interval or described arbitrary time interval.
According to the motor speed control method of the embodiment of the present invention, when actual speed is greater than rotating speed of target, the voltage effective value by reducing motor reduces the actual speed of motor, therefore, copped wave is needed to put more effort, each time interval during increase copped wave or the duration in arbitrary time interval.Otherwise when actual speed is less than rotating speed of target, the voltage effective value by increasing motor increases the actual speed of motor, therefore, need copped wave dynamics to reduce, each time interval during minimizing copped wave or the duration in arbitrary time interval.By this technical scheme, after the copped wave time of power device is dispersed in whole voltage waveform, further adjusting rotary speed can also be carried out by the length changing the copped wave time, thus add the accuracy of stepless speed regulation, greatly eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner runs, improve the performance of product, improve Consumer's Experience.
According to one embodiment of present invention, in described half voltage cycle, the size in described multiple time interval is identical, or described multiple time interval increases successively according to predetermined ratio coefficient or reduces.
According to the motor speed control method of the embodiment of the present invention, in every half voltage cycle, the size in multiple time interval can be all identical, also can increase successively according to predetermined proportionality coefficient or reduce, certainly, the size in multiple time interval can also be set according to other rules in addition as required.
The embodiment of a second aspect of the present invention proposes a kind of motor speed regulating system, for air-conditioner, comprising: setting unit, according to the setting command received, for the motor Offered target rotating speed of described air-conditioner, and according to described rotating speed of target, be set multiple time interval; Voltage detection unit, detects the supply voltage of described air-conditioner; Regulon, whenever detecting that described supply voltage is zero, in ensuing half voltage cycle, repeatedly open and disconnect the drive circuit of power device of described air-conditioner successively according to described multiple time interval, with the actual speed by regulating the virtual value of described supply voltage to regulate described motor.
According to the motor speed regulating system of the embodiment of the present invention, when voltage arrives zero crossing, in ensuing every half period, circulation is opened and is disconnected the drive circuit of power device, when power device disconnects, the value of voltage is zero, and the waveform namely in this time interval is cut.By carrying out repeatedly the copped wave of short time to the waveform of every half period, the voltage effective value of the motor of air-conditioner can be changed, thus regulate the rotating speed of motor further.By this technical scheme, in stepless speed regulation process, can the copped wave time of power device be dispersed in whole voltage waveform, thus can eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner runs, improve the performance of product, improve Consumer's Experience.
According to one embodiment of present invention, also comprise: rotation speed detection unit, after the described break-make by controlling described power device regulates the actual speed of described motor, whether the described actual speed detecting described motor is stablized constant; Judging unit, when determining that described actual speed is stablized constant, judges that whether described actual speed is equal with described rotating speed of target.
According to the motor speed regulating system of the embodiment of the present invention, when carrying out copped wave according to multiple time intervals of initial setting up to the voltage of motor, when voltage effective value tends towards stability, the actual speed of motor also tends towards stability, now, can detect actual speed, if actual speed now and rotating speed of target still have gap, can stepless speed regulation be proceeded.By this technical scheme, after actual speed is stable, can continues to judge whether it conforms to rotating speed of target, to make actual speed closest to rotating speed of target, thus obtain the operational effect of expection, improve practicality and the Consumer's Experience of stepless speed regulation process.
According to one embodiment of present invention, described regulon also for: when the judged result of described judging unit be described actual speed equal with described rotating speed of target time, continue repeatedly open according to described multiple time interval successively and disconnect described drive circuit; And described regulon also comprises: time adjustment unit, when described judged result is described actual speed and described rotating speed of target is unequal, according to the difference of described actual speed and described rotating speed of target, adjust the size in described multiple time interval; And described regulon also for: adjustment described multiple time interval size after, successively according to regulate after described multiple time interval repeatedly open and disconnect described drive circuit.
According to the motor speed regulating system of the embodiment of the present invention, if actual speed equals rotating speed of target, then can proceed stepless speed regulation according to multiple time intervals of presetting, to ensure that the voltage effective value of motor is stabilized in currency, thus further actual speed be maintained rotating speed of target.And if actual speed is not equal to rotating speed of target, then can changes the adjustment level of the voltage effective value to motor by changing multiple time interval, reaching to make the voltage effective value of motor level actual speed being maintained rotating speed of target as early as possible.By this technical scheme, after actual speed is stable, can continues to judge whether it conforms to rotating speed of target, to make actual speed closest to rotating speed of target, thus obtain the operational effect of expection, improve practicality and the Consumer's Experience of stepless speed regulation process.
According to one embodiment of present invention, described time adjustment unit specifically for: when described actual speed is greater than described rotating speed of target, increase each time interval in described multiple time interval or arbitrary time interval, when described actual speed is less than described rotating speed of target, reduce the described each time interval in described multiple time interval or described arbitrary time interval.
According to the motor speed regulating system of the embodiment of the present invention, when actual speed is greater than rotating speed of target, the voltage effective value by reducing motor reduces the actual speed of motor, therefore, copped wave is needed to put more effort, each time interval during increase copped wave or the duration in arbitrary time interval.Otherwise when actual speed is less than rotating speed of target, the voltage effective value by increasing motor increases the actual speed of motor, therefore, need copped wave dynamics to reduce, each time interval during minimizing copped wave or the duration in arbitrary time interval.By this technical scheme, after the copped wave time of power device is dispersed in whole voltage waveform, further adjusting rotary speed can also be carried out by the length changing the copped wave time, thus add the accuracy of stepless speed regulation, greatly eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner runs, improve the performance of product, improve Consumer's Experience.
According to one embodiment of present invention, in described half voltage cycle, the size in described multiple time interval is identical, or described multiple time interval increases successively according to predetermined ratio coefficient or reduces.
According to the motor speed regulating system of the embodiment of the present invention, in every half voltage cycle, the size in multiple time interval can be all identical, also can increase successively according to predetermined proportionality coefficient or reduce, certainly, the size in multiple time interval can also be set according to other rules in addition as required.
Embodiment according to a third aspect of the present invention proposes a kind of air-conditioner, comprise the motor speed regulating system according to any one of technique scheme, therefore, this air-conditioner has the technique effect identical with above-mentioned motor speed regulating system, does not repeat them here.
By technical scheme of the present invention, in stepless speed regulation process, can the copped wave time of power device be dispersed in whole voltage waveform, thus can eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner runs, improve the performance of product, improve Consumer's Experience.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 shows the block diagram of motor speed regulating system of the prior art;
Fig. 2 shows the oscillogram of chopping voltage of the prior art and its electric current produced;
Fig. 3 A shows the flow chart of motor speed control method according to an embodiment of the invention;
Fig. 3 B shows the oscillogram of the electric current that the chopping voltage in the embodiment shown in Fig. 3 A produces with it;
Fig. 3 C shows the oscillogram of the half period of the chopping voltage in Fig. 3 B;
Fig. 4 shows the flow chart of motor speed control method according to another embodiment of the invention;
Fig. 5 shows the block diagram of motor speed regulating system according to an embodiment of the invention;
Fig. 6 shows the block diagram of air-conditioner according to an embodiment of the invention.
Detailed description of the invention
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Fig. 3 A shows the flow chart of motor speed control method according to an embodiment of the invention;
As shown in Figure 3A, motor speed control method according to an embodiment of the invention, comprising:
Step 302, according to the setting command received, is the motor Offered target rotating speed of air-conditioner.
Step 304, according to rotating speed of target, arranges multiple time interval.
Step 306, detects the supply voltage of air-conditioner.
Step 308, whenever detecting that supply voltage is zero, in ensuing half voltage cycle, repeatedly open and disconnect the drive circuit of power device of air-conditioner successively according to multiple time interval, to be regulated the actual speed of motor by the virtual value of regulating power source voltage.
According to the motor speed control method of the embodiment of the present invention, as shown in Figure 3 B, when voltage arrives zero crossing, in ensuing every half period, according to the time interval t preset
1, t
2, t
3, t
4, t
5, t
6, circulation is opened and is disconnected the drive circuit of power device, and when power device disconnects, the value of voltage is zero, and the waveform namely in this time interval is cut, and the waveform of electric current is now also comparatively stable, distorts less.By carrying out repeatedly the copped wave of short time to the waveform of every half period, the voltage effective value of the motor of air-conditioner can be changed, thus regulate the rotating speed of motor further.By this technical scheme, in stepless speed regulation process, can the copped wave time of power device be dispersed in whole voltage waveform, thus can eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner runs, improve the performance of product, improve Consumer's Experience.
According to one embodiment of present invention, after step 308, also comprise: whether the actual speed detecting motor is stablized constant; When determining that actual speed is stablized constant, judge that whether actual speed is equal with rotating speed of target.
According to the motor speed control method of the embodiment of the present invention, when carrying out copped wave according to multiple time intervals of initial setting up to the voltage of motor, when voltage effective value tends towards stability, the actual speed of motor also tends towards stability, now, can detect actual speed, if actual speed now and rotating speed of target still have gap, can stepless speed regulation be proceeded.By this technical scheme, after actual speed is stable, can continues to judge whether it conforms to rotating speed of target, to make actual speed closest to rotating speed of target, thus obtain the operational effect of expection, improve practicality and the Consumer's Experience of stepless speed regulation process.
According to one embodiment of present invention, also comprise: after judging that whether actual speed equal with rotating speed of target, when judged result be actual speed equal with rotating speed of target time, continue repeatedly open according to multiple time interval successively and disconnect drive circuit; When judged result is actual speed and rotating speed of target is unequal, according to the difference of actual speed and rotating speed of target, adjust the size in multiple time interval, and repeatedly open according to the multiple time intervals after regulating and disconnect drive circuit successively.
According to the motor speed control method of the embodiment of the present invention, if actual speed equals rotating speed of target, then can proceed stepless speed regulation according to multiple time intervals of presetting, to ensure that the voltage effective value of motor is stabilized in currency, thus further actual speed be maintained rotating speed of target.And if actual speed is not equal to rotating speed of target, then can changes the adjustment level of the voltage effective value to motor by changing multiple time interval, reaching to make the voltage effective value of motor level actual speed being maintained rotating speed of target as early as possible.By this technical scheme, after actual speed is stable, can continues to judge whether it conforms to rotating speed of target, to make actual speed closest to rotating speed of target, thus obtain the operational effect of expection, improve practicality and the Consumer's Experience of stepless speed regulation process.
According to one embodiment of present invention, according to the difference of actual speed and rotating speed of target, regulate the size in multiple time interval, specifically comprise: when actual speed is greater than rotating speed of target, increase each time interval in multiple time interval or arbitrary time interval; When actual speed is less than rotating speed of target, reduce each time interval in multiple time interval or arbitrary time interval.
According to the motor speed control method of the embodiment of the present invention, when actual speed is greater than rotating speed of target, the voltage effective value by reducing motor reduces the actual speed of motor, therefore, copped wave is needed to put more effort, each time interval during increase copped wave or the duration in arbitrary time interval.Otherwise when actual speed is less than rotating speed of target, the voltage effective value by increasing motor increases the actual speed of motor, therefore, need copped wave dynamics to reduce, each time interval during minimizing copped wave or the duration in arbitrary time interval.By this technical scheme, after the copped wave time of power device is dispersed in whole voltage waveform, further adjusting rotary speed can also be carried out by the length changing the copped wave time, thus add the accuracy of stepless speed regulation, greatly eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner runs, improve the performance of product, improve Consumer's Experience.
According to one embodiment of present invention, in half voltage cycle, the size in multiple time interval is identical, or multiple time interval increases successively according to predetermined ratio coefficient or reduces.
According to the motor speed control method of the embodiment of the present invention, in every half voltage cycle, the size in multiple time interval can be all identical, also can increase successively according to predetermined proportionality coefficient or reduce, certainly, the size in multiple time interval can also be set according to other rules in addition as required.
Such as, as shown in Figure 3 C, in half voltage cycle, power device turns off 6 times, and opening is 5 times, and single turn-off time and the single service time of power device have following characteristics: the single turn-off time is equal, that is: t
1=t
2=t
3=t
4=t
5=t
6; 1st, 2,4,5 service times are equal, and equal with the single turn-off time, that is: T
1=T
2=T
4=T
5=t
1=t
2=t
3=t
4=t
5=t
6; 3rd service time is: T
3=half wave cycles-10*t
1.
Again such as, the time that can arrange each switch-off power device is different, by the time proportionally coefficient k reduction turned off, wherein, and 0<k<1.In a half wave cycles, for the first time, last turn-off time and first time, last service time are equal, for the second time, turn-off time second from the bottom time and second time, secondary service time second from the bottom are equal, the turn-off time of third time is equal with the turn-off time of third from the bottom time, the service time of third time is the summation that half wave cycles deducts that all the other turn on and off the time, that is: t
1=T
1=t
6=T
5; t
2=T
2=t
5=T
4=k*t
1; t
3=t
4=k*k*t
1; T
3=half wave cycles-(4*t
1-4*k*t
1-2*k*k*t
1).
Fig. 4 shows the flow chart of motor speed control method according to another embodiment of the invention.
As shown in Figure 4, motor speed control method according to another embodiment of the invention, comprising:
Step 402, arranges the rotating speed of target of motor.
Step 404, arranges the multiple time intervals opening and closing power device.Namely according to rotating speed of target, multiple time interval is set.
Step 406, judges whether zero cross signal voltage being detected, when judged result is for being, enters step 408, when judged result is no, returns the zero cross signal continuing to detect voltage.
Step 408, according to the drive circuit break-make of the multiple time interval controls power devices arranged.When voltage arrives zero crossing, in ensuing every half period, circulation is opened and is disconnected the drive circuit of power device, when power device disconnects, the value of voltage is zero, and the waveform namely in this time interval is cut, the waveform of electric current is now also comparatively stable, distorts less.
Whether step 410, judges whether the actual speed of motor is stablized, and when judged result is for being, enters step 412, when judged result is no, returns the actual speed continuing to detect motor and stablize.If actual speed now and rotating speed of target still have gap, stepless speed regulation can be proceeded.By this technical scheme, after actual speed is stable, can continues to judge whether it conforms to rotating speed of target, to make actual speed closest to rotating speed of target, thus obtain the operational effect of expection, improve practicality and the Consumer's Experience of stepless speed regulation process.
Step 412, detects the actual speed of motor.
Step 414, judging whether the actual speed of motor equals rotating speed of target, when judged result is for being, enters step 416, when judged result is no, entering step 418.
Step 416, continues the drive circuit break-make according to the multiple time interval controls power devices arranged.If actual speed equals rotating speed of target, then can proceed stepless speed regulation according to multiple time intervals of presetting, to ensure that the voltage effective value of motor is stabilized in currency, thus further actual speed be maintained rotating speed of target.
Step 418, judging whether the actual speed of motor is less than rotating speed of target, when judged result is for being, enters step 420, when judged result is no, entering step 422.If actual speed is not equal to rotating speed of target, then can changes the adjustment level of the voltage effective value to motor by changing multiple time interval, reaching to make the voltage effective value of motor level actual speed being maintained rotating speed of target as early as possible.
Step 420, reduces the time interval of the drive circuit break-make controlling power device.
Step 422, increases the time interval of the drive circuit break-make controlling power device.
Pass through technique scheme, in stepless speed regulation process, can the copped wave time of power device be dispersed in whole voltage waveform, thus can eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner runs, improve the performance of product, improve Consumer's Experience.
Fig. 5 shows the block diagram of motor speed regulating system according to an embodiment of the invention.
As shown in Figure 5, motor speed regulating system 500 according to an embodiment of the invention, comprising: setting unit 502, according to the setting command received, is the motor Offered target rotating speed of air-conditioner, and according to rotating speed of target, arranges multiple time interval; Voltage detection unit 504, detects the supply voltage of air-conditioner; Regulon 506, whenever detecting that supply voltage is zero, in ensuing half voltage cycle, repeatedly open and disconnect the drive circuit of power device of air-conditioner successively according to multiple time interval, to be regulated the actual speed of motor by the virtual value of regulating power source voltage.
According to the motor speed regulating system 500 of the embodiment of the present invention, when voltage arrives zero crossing, in ensuing every half period, circulation is opened and is disconnected the drive circuit of power device, when power device disconnects, the value of voltage is zero, and the waveform namely in this time interval is cut.By carrying out repeatedly the copped wave of short time to the waveform of every half period, the voltage effective value of the motor of air-conditioner can be changed, thus regulate the rotating speed of motor further.By this technical scheme, in stepless speed regulation process, can the copped wave time of power device be dispersed in whole voltage waveform, thus can eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner runs, improve the performance of product, improve Consumer's Experience.
According to one embodiment of present invention, also comprise: rotation speed detection unit 508, after the break-make by controlling power device regulates the actual speed of motor, whether the actual speed detecting motor is stablized constant; Judging unit 510, when determining that actual speed is stablized constant, judges that whether actual speed is equal with rotating speed of target.
According to the motor speed regulating system 500 of the embodiment of the present invention, when carrying out copped wave according to multiple time intervals of initial setting up to the voltage of motor, when voltage effective value tends towards stability, the actual speed of motor also tends towards stability, now, can detect actual speed, if actual speed now and rotating speed of target still have gap, can stepless speed regulation be proceeded.By this technical scheme, after actual speed is stable, can continues to judge whether it conforms to rotating speed of target, to make actual speed closest to rotating speed of target, thus obtain the operational effect of expection, improve practicality and the Consumer's Experience of stepless speed regulation process.
According to one embodiment of present invention, regulon 506 also for: when the judged result of judging unit 510 be actual speed equal with rotating speed of target time, continue repeatedly open according to multiple time interval successively and disconnect drive circuit; And regulon 506 also comprises: time adjustment unit 5062, when judged result is actual speed and rotating speed of target is unequal, according to the difference of actual speed and rotating speed of target, adjust the size in multiple time interval; And regulon 506 also for: adjustment multiple time interval size after, successively according to regulate after multiple time intervals repeatedly open and disconnect drive circuit.
According to the motor speed regulating system 500 of the embodiment of the present invention, if actual speed equals rotating speed of target, then can proceed stepless speed regulation according to multiple time intervals of presetting, to ensure that the voltage effective value of motor is stabilized in currency, thus further actual speed be maintained rotating speed of target.And if actual speed is not equal to rotating speed of target, then can changes the adjustment level of the voltage effective value to motor by changing multiple time interval, reaching to make the voltage effective value of motor level actual speed being maintained rotating speed of target as early as possible.By this technical scheme, after actual speed is stable, can continues to judge whether it conforms to rotating speed of target, to make actual speed closest to rotating speed of target, thus obtain the operational effect of expection, improve practicality and the Consumer's Experience of stepless speed regulation process.
According to one embodiment of present invention, time adjustment unit 5062 specifically for: when actual speed is greater than rotating speed of target, increase each time interval in multiple time interval or arbitrary time interval, when actual speed is less than rotating speed of target, reduce each time interval in multiple time interval or arbitrary time interval.
According to the motor speed regulating system 500 of the embodiment of the present invention, when actual speed is greater than rotating speed of target, voltage effective value by reducing motor reduces the actual speed of motor, therefore, copped wave is needed to put more effort, each time interval during increase copped wave or the duration in arbitrary time interval.Otherwise when actual speed is less than rotating speed of target, the voltage effective value by increasing motor increases the actual speed of motor, therefore, need copped wave dynamics to reduce, each time interval during minimizing copped wave or the duration in arbitrary time interval.By this technical scheme, after the copped wave time of power device is dispersed in whole voltage waveform, further adjusting rotary speed can also be carried out by the length changing the copped wave time, thus add the accuracy of stepless speed regulation, greatly eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner runs, improve the performance of product, improve Consumer's Experience.
According to one embodiment of present invention, in half voltage cycle, the size in multiple time interval is identical, or multiple time interval increases successively according to predetermined ratio coefficient or reduces.
According to the motor speed regulating system 500 of the embodiment of the present invention, in every half voltage cycle, the size in multiple time interval can be all identical, also can increase successively according to predetermined proportionality coefficient or reduce, certainly, the size in multiple time interval can also be set according to other rules in addition as required.
Fig. 6 shows the block diagram of air-conditioner according to an embodiment of the invention.
As shown in Figure 6, air-conditioner 600 according to an embodiment of the invention, comprise: motor speed regulating system 602 (being equivalent to the motor speed regulating system 500 in the embodiment shown in Fig. 5), for the setting command that basis receives, for the motor Offered target rotating speed of air-conditioner 600, and according to rotating speed of target, multiple time interval is set; And detect the supply voltage of air-conditioner 600, and when often detecting that supply voltage is zero, in ensuing half voltage cycle, repeatedly open and disconnect the drive circuit of power device of air-conditioner 600 successively according to multiple time interval, to be regulated the actual speed of motor by the virtual value of regulating power source voltage.
According to the air-conditioner 600 of the embodiment of the present invention, when voltage arrives zero crossing, in ensuing every half period, circulation is opened and is disconnected the drive circuit of power device, when power device disconnects, the value of voltage is zero, and the waveform namely in this time interval is cut, the waveform of electric current is now also comparatively stable, distorts less.By carrying out repeatedly the copped wave of short time to the waveform of every half period, the voltage effective value of the motor of air-conditioner 600 can be changed, thus regulate the rotating speed of motor further.By this technical scheme, in stepless speed regulation process, can the copped wave time of power device be dispersed in whole voltage waveform, thus can eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner 600 runs, improve the performance of product, improve Consumer's Experience.
According to one embodiment of present invention, motor speed regulating system 602 also for: detect the actual speed of motor and whether stablize constant; When determining that actual speed is stablized constant, judge that whether actual speed is equal with rotating speed of target.
According to the air-conditioner 600 of the embodiment of the present invention, when carrying out copped wave according to multiple time intervals of initial setting up to the voltage of motor, when voltage effective value tends towards stability, the actual speed of motor also tends towards stability, now, can detect actual speed, if actual speed now and rotating speed of target still have gap, can stepless speed regulation be proceeded.By this technical scheme, after actual speed is stable, can continues to judge whether it conforms to rotating speed of target, to make actual speed closest to rotating speed of target, thus obtain the operational effect of expection, improve practicality and the Consumer's Experience of stepless speed regulation process.
According to one embodiment of present invention, motor speed regulating system 602 also for: after judging that whether actual speed equal with rotating speed of target, when judged result be actual speed equal with rotating speed of target time, continue repeatedly open according to multiple time interval successively and disconnect drive circuit; When judged result is actual speed and rotating speed of target is unequal, according to the difference of actual speed and rotating speed of target, adjust the size in multiple time interval, and repeatedly open according to the multiple time intervals after regulating and disconnect drive circuit successively.
According to the air-conditioner 600 of the embodiment of the present invention, if actual speed equals rotating speed of target, then can proceed stepless speed regulation according to multiple time intervals of presetting, to ensure that the voltage effective value of motor is stabilized in currency, thus further actual speed be maintained rotating speed of target.And if actual speed is not equal to rotating speed of target, then can changes the adjustment level of the voltage effective value to motor by changing multiple time interval, reaching to make the voltage effective value of motor level actual speed being maintained rotating speed of target as early as possible.By this technical scheme, after actual speed is stable, can continues to judge whether it conforms to rotating speed of target, to make actual speed closest to rotating speed of target, thus obtain the operational effect of expection, improve practicality and the Consumer's Experience of stepless speed regulation process.
According to one embodiment of present invention, motor speed regulating system 602 for: when actual speed is greater than rotating speed of target, increase each time interval in multiple time interval or arbitrary time interval; When actual speed is less than rotating speed of target, reduce each time interval in multiple time interval or arbitrary time interval.
According to the air-conditioner 600 of the embodiment of the present invention, when actual speed is greater than rotating speed of target, the voltage effective value by reducing motor reduces the actual speed of motor, therefore, copped wave is needed to put more effort, each time interval during increase copped wave or the duration in arbitrary time interval.Otherwise when actual speed is less than rotating speed of target, the voltage effective value by increasing motor increases the actual speed of motor, therefore, need copped wave dynamics to reduce, each time interval during minimizing copped wave or the duration in arbitrary time interval.By this technical scheme, after the copped wave time of power device is dispersed in whole voltage waveform, further adjusting rotary speed can also be carried out by the length changing the copped wave time, thus add the accuracy of stepless speed regulation, greatly eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner 600 runs, improve the performance of product, improve Consumer's Experience.
According to one embodiment of present invention, in half voltage cycle, the size in multiple time interval is identical, or multiple time interval increases successively according to predetermined ratio coefficient or reduces.
According to the air-conditioner 600 of the embodiment of the present invention, in every half voltage cycle, the size in multiple time interval can be all identical, also can increase successively according to predetermined proportionality coefficient or reduce, certainly, the size in multiple time interval can also be set according to other rules in addition as required.
More than be described with reference to the accompanying drawings technical scheme of the present invention, by technical scheme of the present invention, in stepless speed regulation process, can the copped wave time of power device be dispersed in whole voltage waveform, thus can eliminate and to be distorted the vibration and noise that cause by voltage and current, improve the quiet degree that air-conditioner runs, improve the performance of product, improve Consumer's Experience.
The foregoing is only embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a motor speed control method, for air-conditioner, is characterized in that, comprising:
According to the setting command received, it is the motor Offered target rotating speed of described air-conditioner;
According to described rotating speed of target, multiple time interval is set;
Detect the supply voltage of described air-conditioner;
Whenever detecting that described supply voltage is zero, in ensuing half voltage cycle, repeatedly open and disconnect the drive circuit of power device of described air-conditioner successively according to described multiple time interval, with the actual speed by regulating the virtual value of described supply voltage to regulate described motor.
2. motor speed control method according to claim 1, is characterized in that, after the described break-make by controlling described power device regulates the actual speed of described motor, also comprises:
Whether the described actual speed detecting described motor is stablized constant;
When determining that described actual speed is stablized constant, judge that whether described actual speed is equal with described rotating speed of target.
3. motor speed control method according to claim 2, is characterized in that, described judge that whether described actual speed equal with described rotating speed of target after, also comprise:
When judged result be described actual speed equal with described rotating speed of target time, continue repeatedly open according to described multiple time interval successively and disconnect described drive circuit;
When described judged result is described actual speed and described rotating speed of target is unequal, according to the difference of described actual speed and described rotating speed of target, adjust the size in described multiple time interval, and
Repeatedly open according to the described multiple time interval after adjustment and disconnect described drive circuit successively.
4. according to the motor speed control method that claim 3 is stated, it is characterized in that, the described difference according to described actual speed and described rotating speed of target, regulates the size in described multiple time interval, specifically comprises:
When described actual speed is greater than described rotating speed of target, increase each time interval in described multiple time interval or arbitrary time interval;
When described actual speed is less than described rotating speed of target, reduce the described each time interval in described multiple time interval or described arbitrary time interval.
5. motor speed control method according to any one of claim 1 to 4, is characterized in that, in described half voltage cycle, the size in described multiple time interval is identical, or described multiple time interval increases successively according to predetermined ratio coefficient or reduces.
6. a motor speed regulating system, for air-conditioner, is characterized in that, comprising:
Setting unit, according to the setting command received, is the motor Offered target rotating speed of described air-conditioner, and according to described rotating speed of target, arranges multiple time interval;
Voltage detection unit, detects the supply voltage of described air-conditioner;
Regulon, whenever detecting that described supply voltage is zero, in ensuing half voltage cycle, repeatedly open and disconnect the drive circuit of power device of described air-conditioner successively according to described multiple time interval, with the actual speed by regulating the virtual value of described supply voltage to regulate described motor.
7. motor speed regulating system according to claim 6, is characterized in that, also comprise:
Rotation speed detection unit, after the described break-make by controlling described power device regulates the actual speed of described motor, whether the described actual speed detecting described motor is stablized constant;
Judging unit, when determining that described actual speed is stablized constant, judges that whether described actual speed is equal with described rotating speed of target.
8. motor speed regulating system according to claim 7, is characterized in that, described regulon also for:
When the judged result of described judging unit be described actual speed equal with described rotating speed of target time, continue repeatedly open according to described multiple time interval successively and disconnect described drive circuit; And
Described regulon also comprises:
Time adjustment unit, when described judged result is described actual speed and described rotating speed of target is unequal, according to the difference of described actual speed and described rotating speed of target, adjusts the size in described multiple time interval; And
Described regulon also for:
After the size in adjustment described multiple time interval, repeatedly open according to the described multiple time interval after adjustment and disconnect described drive circuit successively.
9. the motor speed regulating system stated according to Claim 8, is characterized in that, described time adjustment unit specifically for:
When described actual speed is greater than described rotating speed of target, increase each time interval in described multiple time interval or arbitrary time interval, when described actual speed is less than described rotating speed of target, reduce the described each time interval in described multiple time interval or described arbitrary time interval.
10. the motor speed regulating system according to any one of claim 6 to 9, is characterized in that, in described half voltage cycle, the size in described multiple time interval is identical, or described multiple time interval increases successively according to predetermined ratio coefficient or reduces.
11. 1 kinds of air-conditioners, is characterized in that, comprise the motor speed regulating system of the air-conditioner according to any one of claim 6 to 10.
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| CN105508278A (en) * | 2015-12-23 | 2016-04-20 | 成都前锋电子电器集团股份有限公司 | Denoising method for alternating-current fan of water heater |
| CN105553367A (en) * | 2016-02-03 | 2016-05-04 | 深圳创维空调科技有限公司 | Air conditioner-based speed regulation method and speed regulation system for PG motor and air conditioner |
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|---|---|
| CN104534615B (en) | 2017-06-09 |
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