CN1601883A - Phase controller of AC motor for air conditionning appts. and phase control method - Google Patents
Phase controller of AC motor for air conditionning appts. and phase control method Download PDFInfo
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Abstract
The on-timing of zero-crossing signal ZS from a zero-crossing detecting circuit 4 which detects a zero voltage of a power source voltage is set to be a leading phase from a zero voltage point of the power source. The pulse width which is on-period of a trigger signal TS of phase control is set to be larger than a minimum pulse width required for turning on a switching element 3 while equal to or higher than a phase difference between the on-timing of the zero crossing signal ZS and the zero voltage point of the power source voltage. If the on-period of the trigger signal TS exceeds the on-timing of a next zero-crossing signal ZS, the trigger signal TS is turned off at the on-timing of the zero-crossing signal ZS.
Description
Technical field
The present invention relates to control the phase controller of the electrical power phase place of the AC motor that is used for air-conditioning equipment, also relate to its control method.
Background technology
Fig. 5 shows the total of the phase controller of conventional AC motor.As shown in Figure 5
Phase controller, AC power supplies 1, AC motor 2 and the switch element 3 composition drive circuit that is connected in series.Zero crossing detector 4 is used to detect the zero cross point of the supply voltage vanishing of AC power supplies 1, and revolution detector 5 is used to detect the revolution of AC motor 2.Controller 6 receives from the zero cross signal ZS of zero crossing detector 4 with from the revolution signal RS of revolution detector 5.Controller comprises trigger signal generator 7, is used to produce the triggering signal that is added to switch element 3, the driving of control AC motor 2.Can be used as in the operating state of desired value at the revolution signal that is detected by revolution detector 5, controller 6 is based on the sequential of zero cross point signal controlling generation triggering signal, and the ON-of prescribed switch element 3 point is adjusted the ON-cycle of switch element 3.Therefore, realize the phase control of AC motor 2.Use SSR (solid state relay) as switch element 3, switch element 3 is opened when receiving triggering signal, and switch element 3 is closed when the load current that flows in AC motor 2 becomes zero.
The operation of conventional phase controller is described below with reference to Fig. 6 to 11.As showing in Fig. 6, zero crossing detector 4 detects the zero cross point Z of supply voltage V, and output zero cross point signal ZS.Zero cross point Z is also referred to as " no-voltage point ".So, behind the triggering sequential interval T d that the starting point (or rising edge) from zero cross point signal ZS passs, trigger signal generator 7 produces triggering signal TS.In the time of the rising edge of triggering signal TS, switch element 3 is opened, and electric current I flows in the AC motor.So, because when load current became zero, switch element 3 was closed, the electric current I of AC motor 2 becomes shown in the length dotted line.Therefore, be added to the electrical power of AC motor 2 according to triggering sequential interval T d change.Therefore, control the revolution of motor 2 by the variation that triggers sequential interval T d.
In the phase controller of this AC motor 2, the pulse width T g that supposes triggering signal TS is set to open the minimum pulse width Tg1 that switch element 3 requires, and hypothesis does not have phase difference between the supply voltage V of AC motor and electric current I.With this understanding, when from zero crossing detector 4 generation zero cross point signal ZS, do not have error, can realize the phase control of AC motor accurately about the zero power supply point of supply voltage V.
Yet, between the supply voltage V of AC motor and electric current I, phase difference is arranged, shift to an earlier date (being that phase place is leading) in the situation of some phase values of the zero cross point Z of supply voltage V with the starting point (or rising edge) of zero cross point signal ZS, when control AC motor has high revolution, can not realize the phase control of AC motor accurately.
Particularly, Fig. 7 shows that control AC motor has the state of high revolution.As in Fig. 7, showing, be set to for pulse width T g in the situation of minimum pulse width Tg1 at triggering signal TS, control AC motor has high revolution, reduce trigger sequential interval T d (that is, Td1＞Td2＞Td3＞Td4＞...).When triggering sequential interval T d was Td1, the electric current I of AC motor began to flow at the rising edge of triggering signal TS, and continues the half period (T/2) of mobile electric power voltage V.When triggering sequential interval T d becomes Td2, because (that is, Td1), the electric current I of AC motor becomes zero, and electric current continues next half period of mobile triggering signal in the ON-cycle of triggering signal TS.When triggering sequential interval T d became Td3, because (that is, close the back at triggering signal TS) behind the trailing edge of triggering signal TS, the electric current I of AC motor became zero, and after this electric current I of AC motor does not flow.When triggering sequential interval T d and become Td4 by next triggering signal TS, the electric current I of AC motor begins at this moment that preface flows, but the cycle of restriction when electric current is opened arrive next no-voltage point, even control the high revolution of AC motor, the revolution step-down of AC motor.
Therefore, for head it off, when the pulse width T g of triggering signal TS is set to Tg2 greater than as shown in FIG. 8 minimum pulse width Tg1, become Td3 and Td4 even trigger sequential interval T d, because the electric current I of motor becomes zero in the ON-cycle of triggering signal TS, therefore half period under electric current continues to flow can obtain the control of high revolution.
Yet, be increased to the state of Tg2 at the pulse width T g of triggering signal TS, control AC motor has in the situation of slow speed, trigger the maximum of sequential interval T d when control, equal as shown in FIG. 9, deduct the value that the pulse width T g2 of triggering signal TS provides (that is, Td=T/2-Tg2) time from the half period (T/2) of supply voltage, problem below occurring can not further lower as the revolution of minimum but can keep.
In addition, as shown in Figure 10, the maximum that triggers sequential interval T d is equaled in the situation of half period of supply voltage V, when the ON-cycle at triggering signal TS, when the electric current I of AC motor became zero, electric current continued the next half period that flows, so the revolution of AC motor uprises.
For head it off, as shown in Figure 11, replace to use long Tg2, therefore the pulse width T g of enough shortening triggering signal TS can restrain the electric current of motor, makes minimum revolution lower.
As described above, in the phase controller of routine,, must change the pulse width T g that triggers the triggering signal TS of sequential by regulation in order to control the revolution of AC motor.Promptly, to high revolution control as shown in FIG. 8, when triggering sequential interval T d is weak point, it is long that pulse width T g is set, to slow speed control as shown in Figure 11, when triggering sequential interval T d is length, pulse width T g short (seeing the number of patent application 08-214577 of Japanese unexamined) is set.
Yet, for the phase place of control stable in the superincumbent conventional structure, must rely on and trigger sequential interval T d from slow speed to high revolution, change the pulse width T g of triggering signal TS.Therefore, also must determine to trigger the length of sequential interval T d, and in the operation of the generation triggering signal TS that carries out by controller, change the pulse width T g of triggering signal TS.As a result, the processing of controller becomes complicated.
In addition, consider the variation of supply voltage, phase difference between the voltage and current of the AC motor that the load variations of AC motor etc. causes, further consider the variation of the ON-sequential of the zero cross point signal ZS that the variation by zero crossing detector causes, must determine the sequential of pulse width T g and the change pulse width T g of triggering signal TS.As a result, must determine the top value of setting according to model or type, this has increased the treating capacity in the research and development.
Summary of the invention
In order to solve top problem, the purpose of this invention is to provide a kind of various models and reducing of being applied to and research and develop the phase controller of AC motor for the treatment of capacity and its phase control method.
According to an aspect of the present invention, the phase controller of the AC motor that is driven by AC power supplies comprises: switch element is connected in series between AC motor and the AC power supplies; Zero crossing detector is connected to AC power supplies, is used to detect the zero cross point of the supply voltage of AC power supplies, and produces zero cross signal; Revolution detector is connected to the AC motor, is used to detect the revolution of AC motor, and produces the revolution signal; Controller based on zero cross signal and revolution signal, by the ON/OFF cycle of control switch element, is in phase controlled the revolution of AC motor.
In this structure, zero crossing detector comprises rising edge setting device 4a, is used for ON-sequential with the zero cross signal of rising edge definition and is provided with more leading than the phase place with respect to the zero cross point predetermined value of supply voltage.
Controller comprises: trigger signal generator, produce the triggering signal that is added to switch element, and therefore in phase control the revolution of AC motor; The computer part receive zero cross signal that is produced by zero crossing detector and the revolution signal that is produced by revolution detector, so computer part 8 applies the triggering for generating clock signal to trigger signal generator.
The computer department branch comprises: calculating section, by adjust from the ON-sequential of zero cross signal to the phase difference period definition the ON-sequential of triggering signal the triggering sequential at interval, calculate the ON-sequential of triggering signal, so starting switch element 3; Trigger ON-cycle adjusting device, ON-cycle of triggering signal of pulse duration definition by it is adjusted into the minimum pulse width that requires greater than starting switch element 3, and predetermined phase difference between the no-voltage point of ON-sequential that is not less than in zero cross signal and supply voltage.
Preferably, in this structure, when the pulse duration of triggering signal was intersected with next zero cross signal, the ON-cycle Be Controlled of triggering signal was so triggering signal is in the ON-of zero cross signal sequential closure.
Preferably, in the superincumbent structure, can the starting switch element when receiving triggering signal, when being zero, the load current that flows in the AC motor closes, therefore the computer part is based on zero cross signal, control produces the sequential of triggering signal, and is adjusted the ON-cycle of switch element by the ON-point of prescribed switch element.
Preferably, when control AC motor has high revolution, shorten and trigger sequential at interval, wherein, when the triggering sequential was set to the zero output maximum revolution, triggering signal rose in the ON-of zero cross signal sequential.When control AC motor has slow speed, elongate and trigger sequential at interval.
In this structure, preferably, may command triggers between sequential and is separated with maximum, this maximum deducts the unlatching switch element by the half period from supply voltage and requires minimum pulse width to define, trigger ON-cycle adjusting device, adjust the ON-cycle of the triggering signal of the minimum pulse width that is set to 3 requirements of starting switch element.
As selection, replace using revolution that detects the AC motor and the revolution detector that produces the revolution signal, but complement characteristic data memory device is stored in voltage that the standard of the AC motor that uses in the controller applies and the standard feature data between the revolution.
According to formation of the present invention, do not change the pulse duration that depends on the triggering signal TS that triggers the sequential interval, the phase place of control that can be stable from slow speed to high revolution.In addition, because do not need to consider that the influence of the phase difference between the voltage and current of the AC motor that the load variations of AC motor causes provides to be applied to various device, and can reduce to research and develop the controller for the treatment of capacity by mains voltage variations.
Description of drawings
Fig. 1 is the theory diagram of the phase controller of embodiment according to the present invention;
Fig. 2 is the oscillogram that shows according to zero cross point signal ZS of the present invention and triggering signal TS;
Fig. 3 be show according to of the present invention in high revolution control zero cross point signal ZS and the oscillogram of triggering signal TS;
Fig. 4 be show according to of the present invention in slow speed control zero cross point signal ZS and the oscillogram of triggering signal TS;
Fig. 5 is the theory diagram of the phase controller of routine;
Fig. 6 is that demonstration is according to the zero cross point signal ZS of the phase controller of routine and the oscillogram of triggering signal TS;
Fig. 7 is that demonstration is according to the zero cross point signal ZS in high revolution control of the phase controller of routine and the oscillogram of triggering signal TS;
Fig. 8 shows when doing measurement in the high revolution control according to the phase controller of routine the oscillogram of zero cross point signal ZS and triggering signal TS;
Fig. 9 is that demonstration is according to the zero cross point signal ZS in slow speed control of the phase controller of routine and the oscillogram of triggering signal TS;
Figure 10 is that demonstration is according to the zero cross point signal ZS in slow speed control of the phase controller of routine and another oscillogram of triggering signal TS;
Figure 11 shows when doing measurement in the slow speed control according to the phase controller of routine the oscillogram of zero cross point signal ZS and triggering signal TS.
Embodiment
Describing the Cheng Qian, should be noted that because the basic structure of preferred examples and conventional having, in whole accompanying drawing, same section is represented by identical reference number.Below with reference to accompanying drawing example of the present invention is described.
Example 1
Fig. 1 shows the total of phase controller of the AC motor of embodiment according to the present invention.With reference to figure 1, AC power supplies 1, AC motor 2 and switch element 3 are connected in series and form the drive circuit of closed loop.Zero crossing detector 4 is connected to AC power supplies 1, detects the zero cross point of the supply voltage of AC power supplies 1.Hereinafter, zero cross point is also referred to as supply voltage vanishing " no-voltage point ".Revolution detector 5 is connected to AC motor 2, detects the revolution of AC motor 2.
Particularly, controller 6 comprises the computer part 8 that is made of microcomputer, it receives zero cross point signal ZS that is produced by zero crossing detector 4 and the revolution signal RS that is produced by revolution detector 5, also receives the rotary speed order (RSC) from the desired value of peripheral control unit.Then, computer part 8 applies triggering for generating clock signal TGT to trigger signal generator 7.When receiving triggering for generating clock signal TGT, trigger signal generator 7 produces triggering signal TS.In this structure, computer part 8 comprises calculating section 8a, and the output timing of the triggering signal TS of calculating starting switch element 3 (that is, TGT).Computer part 8 also comprises triggering ON-cycle adjustment member 8b, adjusts the ON-cycle (that is pulse width T g) of triggering signal TS.Calculating section 8a and triggering ON-cycle adjustment member 8b can be realized by computer program.
In this structure, export in the operating state of the desired value that can become rotary speed order (RSC) at the revolution signal RS of revolution detector 5, computer part 8 is based on the sequential of zero cross point signal ZS control generation triggering signal, and adjust ON-cycle of switch element 3 by the ON-point of prescribed switch element 3, therefore realize the phase control of AC motor 2.Use SSR (solid state relay) as switch element 3, when receiving triggering signal, open switch element 3,, close when the load current that flows in the AC motor 2 becomes zero when because supply voltage becomes zero.
Zero crossing detector 4 has rising edge setting device 4a, make rising edge that the zero cross point signal ZS that produces from zero crossing detector 4 has it (promptly, the initial edge of ON-), this rising edge is arranged on respect to supply voltage V becomes (being that phase place is leading) before zero the predetermined phase value Tw of zero cross point Z.As shown in Figure 2, that is, zero cross point signal ZS is at sequential t
-1Rise, this sequential is than the sequential t of the no-voltage point Z of supply voltage
0Shift to an earlier date phase value Tw.Rising edge setting device 4a can be realized by computer program.
Simultaneously, the calculating section 8a of computer part 8 changes and adjusts the ON-sequential t of Relative Zero crosspoint signal ZS according to target revolution (RSC)
-1The ON-sequential t of triggering signal TS
1(that is rising edge).Therefore, control is from the rising edge t of zero cross point signal ZS
-1Rising edge t to triggering signal TS
1The phase difference of representing by Td.Here, the cycle of phase difference Td is called " triggering sequential at interval ".The ON-period T g (that is, pulse duration) that triggers ON-cycle adjustment member 8b adjustment triggering signal TS is greater than the minimum pulse width Tg1 that opens switch element 3 requirements, and is not less than the ON-sequential t of zero cross point signal ZS
-1No-voltage point t with supply voltage
-0Between phase difference.
That is, only consider to be provided with the ON-sequential t of zero cross point signal ZS
-1And the variation of the phase difference Tw between the no-voltage point Z of supply voltage V and it, trigger the pulse width T g that ON-cycle adjustment member 8b determines to indicate the ON-cycle of triggering signal TS.Therefore, the scope definition of the pulse width T g of triggering signal TS is as follows:
Tg1＜Tg and Tw＜Tg＜Tz
Wherein Tz is the ON-sequential (that is pulse duration) of zero cross point signal ZS.
Here it should be noted that, detect the revolution of AC motor 2 and the revolution detector 5 of output revolutions signal though provide, and based on zero cross point signal ZS and revolution signal in the example in the above, triggering signal TS to the phase place of control switch element 3 controls, in the example of revising, even the precision of revolution is lower, in use also no problem, can omit revolution detector 5.In this case, replace revolution signal,, can control the output timing of triggering signal TS based on the normal data feature that is provided with previously and the zero cross point signal ZS between voltage and the revolution of applying of employed AC motor 2 as controlled target.
The example of phase control running
Hereinafter, with reference to the waveform that is presented at Fig. 2 to 4, the example of the phase control running of AC motor is described.
(example 1)
The control of high/low revolution
In Fig. 2, the ON-cycle of zero cross point signal ZS (that is, pulse duration) intersects at the no-voltage point Z of supply voltage V, its ON-sequential t
-1(that is rising edge) shifts to an earlier date in the phase value Tw of the zero power supply point Z of supply voltage.At ON-sequential t from zero cross point signal ZS
-1After passage triggered sequential interval T d, the triggering signal TS output of trigger signal generator 7 was at sequential t
1Rise.In this structure,, and be not less than the ON-sequential t of zero cross point signal ZS because the pulse width T g in the ON-cycle of triggering signal TS is set to the minimum pulse width Tg1 greater than 3 requirements of starting switch element
-1And the phase difference Tw between the no-voltage point Z of supply voltage V, at the ON-of triggering signal TS sequential t
1(that is, rising edge), the electric current I in the AC motor 2 begins to flow by switch element 3.
After this, switch element 3 in next zero-current point (by sequential t
3Expression) close, so electric current I is not added to AC motor 2.So, in the ON-sequential (that is, rising edge) of the next pulse of triggering signal TS, electric current I is added to AC motor 2, therefore realizes the phase control of AC motor.Trigger sequential interval T d if shorten, the OFF-cycle of the electric current I of reduction AC motor 2 is (for example from t
0To t
1Scope), therefore, control AC motor has high revolution.Simultaneously, trigger sequential interval T d if elongate, increase the OFF-cycle of the electric current I of AC motor 2, therefore controlling the AC motor has slow speed.
(example 2)
The control of high revolution
With reference to the oscillogram that is presented among Fig. 3, the running of the phase control that high revolution is arranged is described.
When control AC motor 2 has high revolution, shorten and trigger sequential interval T d.In the situation of the indoor fan motor that in air-conditioning equipment, uses, when the revolution that increases motor when being high, common current phase is the phase place of leading current voltage (that is, phase place is leading) a little, and therefore the electric current I that flows in AC motor 2 becomes as shown in Figure 3.That is, put Z (=t in no-voltage at supply voltage V
0) before the vanishing, electric current I is at zero-current point I
0Vanishing.
The control of maximum revolution
When hypothesis triggers sequential interval T d=0 (that is t,
-1=t
1) when exporting maximum revolution, though triggering signal TS is at ON-sequential (that is t, of zero cross point signal ZS
-1=t
1) rise, this moment, electric current just flowed in AC motor 2.Here, the pulse width T g in the ON-cycle of triggering signal TS is set to Tg2, and Tg2 is not less than phase difference Tw between the no-voltage point Z of the ON-sequential of zero cross point signal ZS and supply voltage V (that is Tg2＞Tw).Therefore, the condition of the triggering signal TS after rising edge is with following order modification:
(1) the zero-current point I of AC motor 2
0,
(2) zero power supply point the Z (=t of supply voltage V
0),
(3) OFF-of triggering signal TS point (=t
2).
As a result, at the OFF-of triggering signal TS point (=t
2) after, electric current I continues to flow in AC motor 2.Therefore, therefore drive motor can obtain maximum revolution at full speed.
(example 3)
The control of slow speed
Below, with reference to the oscillogram that is presented among Fig. 4, description control has the running of slow speed.
When control AC motor 2 has slow speed, elongate and trigger sequential interval T d.As shown in Figure 4, when the AC motor when slow speed drives, usually, current phase is put Z (=t at supply voltage V in no-voltage than the phase lag of supply voltage
0) after, electric current I is at zero-current point I
0Become zero.
Suppose to elongate triggering sequential interval T d, by triggering the pulse width T g that sequential interval T d adds the ON-cycle of triggering signal TS, the half period T/2 of (Td+Tg) cycle beyond supply voltage as shown in FIG. 4 of definition makes the pulse width T g of triggering signal TS intersect at the rising edge of next zero cross point signal ZS (some t
-1').In this case, the ON-cycle of control triggering signal TS, so triggering signal TS is at rising edge (that is some t, of zero cross point signal ZS
-1') close.In addition, control triggers sequential interval T d maximum (Tdmax), this be by the half period T/2 from supply voltage deduct open minimum pulse width Tg1 definition that switch element 3 requires (that is, Tdmax=T/2-Tg1).Therefore, trigger ON-cycle (that is, the pulse duration) Tg that ON-cycle adjusting device 8b adjusts triggering signal TS, so the actual ON-cycle of triggering signal TS is set to Tg1.
The control of minimum revolution
When the control motor driven had minimum revolution, the current phase of AC motor 2 was set to the phase place of phase lag in supply voltage, the rising edge of zero cross point signal ZS (that is some t,
-1') be set to no-voltage point Z (=t than supply voltage V
0) leading phase place value Tw.Therefore, (that is, put t at its rising edge
1) after, the state of triggering signal TS is with following order modification:
(1) is equivalent to rising edge (that is some t, of the zero cross point signal ZS that the OFF-of triggering signal TS orders
-1'),
(2) zero power supply point the Z (=t of supply voltage V
0),
(3) the zero-current point I of AC motor 2
0
As a result, at the OFF-of triggering signal TS point (that is some t,
-1') after, the electric current of AC motor 2 is at zero-current point I
0Close, therefore realize that the phase control of AC motor has minimum revolution.
As described above, according to the present invention, just consider to be provided with phase difference Tw between the no-voltage point Z of the ON-sequential of zero cross point signal ZS and supply voltage V and its variation, determine the pulse width T g in the ON-cycle of triggering signal TS, making can be the wide region from slow speed to high revolution, the phase control of stable realization AC motor, avoid by mains voltage variations, the influence of variation of the ON-sequential of the zero cross point signal ZS that the variation by zero crossing detector causes is also avoided in the influence of the phase difference between the voltage and current of the AC motor that the load variations of AC motor etc. causes.
As described above, the phase controller of air-conditioning equipment according to the present invention, the no-voltage point of the leading AC power supplies voltage of ON-sequential of zero cross point signal ZS, the pulse duration in the ON-cycle of triggering signal TS is set to need only the minimum pulse width that requires greater than starting switch element 3, as long as and be not less than phase difference between the no-voltage point of the ON-sequential of zero cross point signal ZS and supply voltage, when the ON-cycle of triggering signal TS surpassed the ON-sequential of next zero cross point signal ZS, triggering signal TS closed in the ON-sequential of zero cross point signal ZS.
Thereby, do not change any processing of the pulse duration of triggering signal, the phase place of control that can be stable from slow speed to high revolution.In addition, only need to consider the variation of zero cross point testing circuit, do not need to consider by mains voltage variations the influence of the phase difference between the voltage and current of the AC motor that the load variations of AC motor etc. causes.As a result, provide the controller that can be applied to various device, and reduce the research and development treating capacity.
As described above, according to the present invention, because the phase place of the revolution of control that the phase controller of the AC motor of air-conditioning equipment energy is stable from slow speed to high revolution, be not subjected to depending on the influence of difference of the load characteristic of various different models and type, the present invention can be applied to use the AC motor to realize the electronic apparatus of the family of various speed control, as fan heater.
Though in conjunction with preferred embodiment, the present invention has been described with reference to the drawings, has should be noted that to various changes of those skilled in the art and modification be tangible.Should understand, these modifications and variations comprise within the scope of the appended claims.
Claims (7)
1. the phase controller of an AC motor that is driven by AC power supplies comprises:
Switch element (3) is connected in series between AC motor (2) and the AC power supplies (1);
Zero crossing detector (4) is connected to AC power supplies (1), is used to detect the zero cross point of the supply voltage of AC power supplies (1), and produces zero cross signal;
Revolution detector (5) is connected to AC motor (2), is used to detect the revolution of AC motor (2), and produces the revolution signal;
Controller (6) based on zero cross signal and revolution signal, by the ON-OFF cycle of control switch element (3), is in phase controlled the revolution of AC motor (2),
Wherein, zero crossing detector (4) comprises rising edge setting device (4a), and the ON-sequential of zero cross signal that is used to be provided with the rising edge definition is more leading than the phase place with respect to the zero cross point predetermined value of supply voltage;
Wherein, controller (6) comprising:
Trigger signal generator (7) produces the triggering signal that is added to switch element (3), therefore in phase controls the revolution of AC motor (2);
Computer part (8) receive zero cross signal that is produced by zero crossing detector (4) and the revolution signal that is produced by revolution detector (5), so computer part (8) applies the triggering for generating clock signal to trigger signal generator (7);
Wherein, computer part (8) comprising:
Calculating section (8a), by adjust from the ON-sequential of zero cross signal to the phase difference period definition the ON-sequential of triggering signal the triggering sequential at interval, calculate the ON-sequential of triggering signal;
Trigger ON-cycle adjusting device (8b), adjustment is the minimum pulse width that requires greater than starting switch element (3) by the ON-cycle of the triggering signal of pulse duration definition, and the predetermined phase difference between the no-voltage point of ON-sequential that is not less than in zero cross signal and supply voltage;
Wherein, when the pulse duration of triggering signal is intersected with the ON-sequential of next zero cross signal, the ON-cycle of control triggering signal, therefore, in the closed triggering signal of the ON-of zero cross signal sequential.
2. phase controller according to claim 1, it is characterized in that when receiving triggering signal, open switch element (3), when being zero, the load current that flows in the AC motor closes, therefore control produces the sequential of triggering signal to the computer part based on zero cross signal, and adjusts the ON-cycle of switch element.
3. phase controller according to claim 1, it is characterized in that when controlling AC motor (2) when high revolution is arranged, shorten and trigger sequential at interval, trigger sequential and be set to Td=0 output maximum revolution, although triggering signal rises in the ON-of zero cross signal sequential.
4. phase controller according to claim 1 is characterized in that elongating and triggering sequential at interval when control AC motor has slow speed.
5. phase controller according to claim 4, it is characterized in that when being separated with maximum between control triggering sequential, this maximum deducts unlatching switch element (3) by the half period from supply voltage and requires minimum pulse width to determine, trigger ON-cycle adjusting device, adjust the ON-cycle of the triggering signal that is set to minimum pulse width.
6. the phase controller of an AC motor that is driven by AC power supplies comprises:
Switch element (3) is connected in series in AC motor (2) and AC power supplies 91) between;
Zero crossing detector (4) is connected to AC power supplies (1), is used to detect the zero cross point of the supply voltage of AC power supplies (1), and produces zero cross signal;
The standard feature data storage device, the standard that is used to be stored in the AC motor applies the standard feature data between voltage and the revolution;
Controller (6) based on zero cross signal with from the standard feature data that the standard feature data storage device obtains, by the ON/OFF cycle of control switch element (3), is in phase controlled the revolution of AC motor (2);
Wherein, zero crossing detector (4) comprises rising edge setting device (4a), and the ON-sequential of zero cross signal that is used to be provided with the rising edge definition is more leading than the phase place with respect to the zero cross point predetermined value of supply voltage;
Its middle controller (6) comprising:
Trigger signal generator (7) produces the triggering signal that is added to switch element (3), therefore in phase controls the revolution of AC motor (2);
Computer part (8) receive zero cross signal that is produced by zero crossing detector (4) and the standard feature data that obtain from the standard feature data storage device, so computer part (8) applies the triggering for generating clock signal to trigger signal generator (7);
Wherein computer part (8) comprising:
Calculating section (8a), by adjust from the ON-sequential of zero cross signal to the phase difference period definition of the ON-sequential of triggering signal the triggering sequential at interval, calculate the ON-sequential of triggering signal;
Trigger ON-cycle adjusting device (8b), the minimum pulse width that the ON-cycle of the triggering signal of adjustment pulse duration definition requires greater than the starting switch element, and the predetermined phase difference between the no-voltage point of ON-sequential that is not less than in zero cross signal and supply voltage.
7. the phase control method of the AC motor phase that driven by AC power supplies of a control uses the switch element (3) that is connected in series between AC motor (2) and the AC power supplies (1), comprises step:
Detect the zero cross point of the supply voltage of AC power supplies (1), and produce zero cross signal;
Detect the revolution of AC motor (2), and produce its revolution signal;
Based on zero cross signal and revolution signal,, in phase control the revolution of AC motor (2) by the ON/OFF cycle of control switch element (3);
Wherein, the zero cross detection step comprises, the ON-sequential of zero cross signal that the rising edge definition is set is more leading than the phase place with respect to the zero cross point predetermined value of supply voltage;
Wherein, controlled step comprises step:
Generation is added to the triggering signal of switch element (3), therefore in phase controls the revolution of AC motor (2);
Based on zero cross signal and revolution signal, calculate the triggering for generating clock signal,
Wherein calculation procedure comprises step:
By adjust from the ON-sequential of zero cross signal to the phase difference period definition of the ON-sequential of triggering signal TS the triggering sequential at interval, calculate the ON-sequential of triggering signal, therefore open switch element;
The minimum pulse width that the ON-sequential of the triggering signal of adjustment pulse duration definition requires greater than the starting switch element, and the predetermined phase difference between the no-voltage point of ON-sequential that is not less than in zero cross signal and supply voltage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003329641 | 2003-09-22 | ||
| JP2003329641A JP3861867B2 (en) | 2003-09-22 | 2003-09-22 | Phase control device for air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1601883A true CN1601883A (en) | 2005-03-30 |
| CN1303754C CN1303754C (en) | 2007-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100749505A Active CN1303754C (en) | 2003-09-22 | 2004-09-01 | Phase controller of AC motor for air conditionning appts. and phase control method |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3861867B2 (en) |
| CN (1) | CN1303754C (en) |
| MY (1) | MY137173A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1988369B (en) * | 2005-12-22 | 2010-09-22 | 乐金电子(天津)电器有限公司 | Phase control system and its control method for air conditioner |
| CN103429993A (en) * | 2011-03-08 | 2013-12-04 | 思科技术公司 | Phase-based operation of devices on polyphase electric distribution system |
| CN104660123A (en) * | 2013-11-21 | 2015-05-27 | 奇鋐科技股份有限公司 | Fan motor control device |
| CN114992768A (en) * | 2022-05-20 | 2022-09-02 | 宁波奥克斯电气股份有限公司 | PWM modulation method and device, air conditioner and readable storage medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207961B (en) * | 2006-12-21 | 2011-11-16 | 香港理工大学 | Electric voltage regulating and controlling circuit of illumination light |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4070605A (en) * | 1974-08-08 | 1978-01-24 | Mcneil Corporation | Polyphase power control |
| JPS61196791A (en) * | 1985-02-22 | 1986-08-30 | Stanley Electric Co Ltd | Speed controller of single-phase induction motor |
| JP2603936B2 (en) * | 1987-03-06 | 1997-04-23 | ダイキン工業株式会社 | Rotation speed control device for AC motor |
| JPH074078B2 (en) * | 1987-08-24 | 1995-01-18 | 三菱電機株式会社 | Control method of motor for blower of air conditioner |
| EP0381789B1 (en) * | 1989-02-07 | 1994-04-20 | Siemens Aktiengesellschaft | Control method and device for single or multiphase AC voltage converters |
| JP3458523B2 (en) * | 1994-12-07 | 2003-10-20 | 三菱電機株式会社 | MOTOR DEVICE / MOTOR DRIVE DEVICE AND ITS CONTROL METHOD |
| KR20010011404A (en) * | 1999-07-28 | 2001-02-15 | 윤종용 | Velocity control apparatus for the fan motor of an air - conditioner and method therefor |
-
2003
- 2003-09-22 JP JP2003329641A patent/JP3861867B2/en not_active Expired - Fee Related
-
2004
- 2004-09-01 CN CNB2004100749505A patent/CN1303754C/en active Active
- 2004-09-20 MY MYPI20043824A patent/MY137173A/en unknown
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1988369B (en) * | 2005-12-22 | 2010-09-22 | 乐金电子(天津)电器有限公司 | Phase control system and its control method for air conditioner |
| CN103429993A (en) * | 2011-03-08 | 2013-12-04 | 思科技术公司 | Phase-based operation of devices on polyphase electric distribution system |
| CN103429993B (en) * | 2011-03-08 | 2016-08-17 | 思科技术公司 | The operation based on phase place of the equipment in heterogeneous distribution system |
| CN104660123A (en) * | 2013-11-21 | 2015-05-27 | 奇鋐科技股份有限公司 | Fan motor control device |
| CN104660123B (en) * | 2013-11-21 | 2017-07-28 | 奇鋐科技股份有限公司 | Fan motor control device |
| CN114992768A (en) * | 2022-05-20 | 2022-09-02 | 宁波奥克斯电气股份有限公司 | PWM modulation method and device, air conditioner and readable storage medium |
| CN114992768B (en) * | 2022-05-20 | 2023-08-04 | 宁波奥克斯电气股份有限公司 | PWM modulation method and device, air conditioner and readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| MY137173A (en) | 2009-01-30 |
| CN1303754C (en) | 2007-03-07 |
| JP2005102347A (en) | 2005-04-14 |
| JP3861867B2 (en) | 2006-12-27 |
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