CN1949653A - Non-sensor motor control circuit without mask program - Google Patents
Non-sensor motor control circuit without mask program Download PDFInfo
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- CN1949653A CN1949653A CNA2005101138039A CN200510113803A CN1949653A CN 1949653 A CN1949653 A CN 1949653A CN A2005101138039 A CNA2005101138039 A CN A2005101138039A CN 200510113803 A CN200510113803 A CN 200510113803A CN 1949653 A CN1949653 A CN 1949653A
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- 238000007667 floating Methods 0.000 claims abstract description 40
- 238000012216 screening Methods 0.000 claims abstract description 29
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Abstract
The invention is a motor control circuit, comprising detection circuit, comparison circuit, screening circuit, and driving circuit, where the detection circuit is coupled to plural coils of a motor to generate detection signal, which is related with the end point voltage of a floating coil of these coils; based on the comparison between the detection signal and a voltage reference, the comparison circuit generates a comparative signal; the screening circuit in turn receives the first and second crosses of the comparative signal and responds to the second cross to generate an indication signal; and the driving circuit responds to the indication signal to control motor phase change operation.
Description
Technical field
The present invention relates to a kind of no sensor motor control circuit, relate in particular to and a kind ofly need not use any mask program but still can correctly detect back electromotive force (back electrical motionforce, the no sensor motor control circuit of mistake null event (zero-crossing) BEMF).
Background technology
Fig. 1 shows the circuit diagram of known three-phase motor 11 and commutation circuit 12.Motor 11 has three loop A, B and C, and wherein each coil end points is coupled, shown in the central point N of Fig. 1, another end points Pa, the Pb of each coil, with Pc then be coupled in commutation circuit 12.Commutation circuit 12 has three pairs of identical upsides and side switch SH1 to SH3 and SL1 to SL3, is used for determining respectively three loop A, B, with end points Pa, the Pb of C, be coupled to supply-voltage source V with Pc
m, or be coupled to earth potential or be in and neither be coupled to supply-voltage source V
mBe not coupled to earthy floating state yet.
Specifically, commutation circuit 12 operates in six kinds of phase places successively, thereby constitutes an operational cycle, so that suitably guide drive current flow through three loop A, B, the running of CD-ROM drive motor 11 effectively with C.In first phase place, only the first side switch SH1 and the second side switch SL2 conducting make the end points Pa of loop A be coupled to supply-voltage source V
m, the end points Pb of the coil B end points Pc that is coupled to earth potential coil C then is in floating state.As a result, motor drive current is from supply-voltage source V
m, flow to earth potential through loop A and B successively.In second phase place, only the first side switch SH1 and the 3rd side switch SL3 conducting make the end points Pa of loop A be coupled to supply-voltage source V
m, the end points Pb of the coil B end points Pc that is in floating state coil C then is coupled to earth potential.As a result, motor drive current is from supply-voltage source V
m, flow to earth potential through loop A and C successively.In the third phase position, the only second side switch SH2 and the 3rd side switch SL3 conducting, the end points Pb that makes the end points Pa of loop A be in floating state, coil B is coupled to supply-voltage source V
m, coil C end points Pc then be coupled to earth potential.As a result, motor drive current is from supply-voltage source V
m, flow to earth potential through coil B and C successively.In the 4th phase place, the only second side switch SH2 and the first side switch SL1 conducting makes the end points Pb that the end points Pa of loop A is coupled to earth potential, coil B be coupled to supply-voltage source V
m, coil C end points Pc then be in floating state.As a result, motor drive current is from supply-voltage source V
m, flow to earth potential through coil B and A successively.In the 5th phase place, only the 3rd side switch SH3 and the first side switch SL1 conducting, the end points Pc that makes end points Pb that the end points Pa of loop A is coupled to earth potential, coil B be in floating state coil C then is coupled to supply-voltage source V
mAs a result, motor drive current is from supply-voltage source V
m, flow to earth potential through coil C and A successively.In the 6th phase place, only the 3rd side switch SH3 and the second side switch SL2 conducting, the end points Pc that the end points Pb that makes the end points Pa of loop A be in floating state, coil B is coupled to earth potential coil C then is coupled to supply-voltage source V
mAs a result, motor drive current is from supply-voltage source V
m, flow to earth potential through coil C and B successively.
In no sensor motor control technique, the end-point voltage that is in the coil of floating state is to be used for judging the commutation important evidence on opportunity, because be in the end-point voltage of coil of floating state and the back electromotive force that the potential difference between coupling central point N is represented motor.The sequential chart of the voltage that Fig. 2 shows loop A, B, present with end points Pa, the Pb of C, with the Pc place.Can know from figure and find out that coil is at the initial stage that enters floating state, violent variation can take place in its end-point voltage, and this is because the inductance characteristic of coil causes.For instance, situation, because originally the electric current of flowing through coil B can't be removed by moment, so it is transferred the free-wheel diode of the conducting second side switch SH2 and flows into supply-voltage source V from first phase transition to second phase place
mTherefore, at the initial stage of second phase place, the end points Pb voltage of coil B is from earth potential moment high jump and than supply-voltage source V
mMore exceeded a diode forward conduction voltage drop.Influence the adverse consequences of the mistake null event of the detecting of back electromotive force and the back electromotive force that causes misjudgment for fear of the float acute variation at initial stage of this kind, known no sensor motor control circuit uses usually and covers circuit, is used for preventing in advance that the acute variation at the initial stage of floating is input to comparison circuit.
Fig. 3 shows the circuit block diagram of known no sensor motor control circuit 30.Back electromotive force circuit for detecting 33 be coupled in loop A, B, with end points Pa, Pb and the Pc of C, with the float back electromotive force of coil of detecting.Cover circuit 34 and be arranged between back electromotive force circuit for detecting 33 and the comparison circuit 35, the acute variation that is used to prevent the initial stage of floating is sent to comparison circuit 35 and the detecting result that makes the mistake.The generation of the measured mistake null event of circuit 35 based on the comparison, drive signal combiner circuit 36 produces appropriate driving signal, is used to control the upside and the side switch of commutation circuit 32, correctly to carry out the commutation operation of motor 31.And drive signal is also supplied to covers circuit 34 and comparison circuit 35, with the execution opportunity of control mask program.
In known technology, cover circuit 34 and preestablish covering period of what a regular length usually, and suppose that it enough contains the acute variation at the initial stage of floating fully.Yet in fact the occupied time range of the acute variation at the initial stage of floating is not a fixed value, but can be along with various factorss such as the rotating speed of motor and the sizes of motor drive current and change.Though in some known technology, covering circuit 34 improves and becomes to provide covering period of adjustable-length, but even so, the modulation rate of this adjustable elongated degree still must preestablish, and when predefined modulation rate can't tally with the actual situation, the acute variation at the initial stage of floating still can't be covered fully.
Summary of the invention
In view of foregoing problems, one object of the present invention just is to provide a kind of no sensor motor control circuit, need not use any mask program still can correctly detect the mistake null event of back electromotive force.
Motor control circuit according to the present invention is applied to have the motor of a plurality of coils, has circuit for detecting, comparison circuit, screening circuit and drive circuit.Circuit for detecting is coupled in this a plurality of coils, is used to produce detection signal.This detection signal is an end-point voltage that is chosen to be the coil of floating state that is associated with in these a plurality of coils.This comparison circuit is to be coupled in this circuit for detecting so that relatively this detection signal and reference voltage and produce comparison signal.This screening circuit is to be coupled in this comparison circuit so that receive this comparison signal.This screening circuit receives the friendship first time of this comparison signal successively and hands over more more with for the second time, and hands over for the second time more and the generation index signal in response to this.This drive circuit is controlled the commutation operation of this motor in response to this index signal.
Motor control method according to the present invention is applied to have the motor of a plurality of coils, comprises the following step.Detect the end-point voltage of the coil that is chosen to be floating state in these a plurality of coils and produce detection signal.Relatively this detection signal and reference voltage and produce comparison signal.This comparison signal has to hand over more with for the second time for the first time to be handed over more.Hand over for the first time from this and to filter out this handing over more for the second time with this more and hand over more for the second time.Hand over for the second time more and the generation index signal in response to this.Control the commutation operation of this motor in response to this index signal.
Description of drawings
Fig. 1 shows the known three-phase motor and the circuit diagram of commutation circuit;
Fig. 2 shows the sequential chart of the end-point voltage of motor coil;
Fig. 3 shows the circuit block diagram of known motor control circuit;
Fig. 4 shows the circuit block diagram according to motor control circuit of the present invention;
Fig. 5 shows the operating principle schematic diagram according to screening circuit of the present invention;
Fig. 6 (A) shows the detailed circuit diagram according to first example of screening circuit of the present invention;
Fig. 6 (B) shows the operation waveform sequential chart according to first example of screening circuit of the present invention;
Fig. 7 shows the detailed circuit diagram according to second example of screening circuit of the present invention.
Embodiment
Explanation hereinafter and accompanying drawing will make aforementioned and other purposes of the present invention, feature, more obvious with advantage.Here describe in detail according to a preferred embodiment of the invention with reference to the accompanying drawings.
Fig. 4 shows the circuit block diagram according to no sensor motor control circuit 40 of the present invention.At first with known technology in the same manner, back electromotive force circuit for detecting 43 be coupled in loop A, B, with end points Pa, Pb and the Pc of C, with the float back electromotive force of coil of detecting.Yet in the present invention, the detection signal of back electromotive force circuit for detecting 43 is to be directly inputted to comparison circuit 45, and without any known adjustment of covering circuit 34 or correction.Subsequently, screening circuit 47 receives the comparison signal of comparison circuit 45 and analyzes, to select the mistake null event that can be used to control commutation.Based on selected the mistakes null event of screening circuit 47, drive signal combiner circuit 46 produces appropriate driving signal, is used to control commutation circuit 42 and makes motor 41 carry out commutation to operate.In other words, cover circuit and the method for known technology can be considered the technology that belongs to a kind of " before the zero passage detecting (pre-zero-crossing) ", yet can be considered the technology that belongs to a kind of " the zero passage detecting is (post-zero-crossing) afterwards " according to screening circuit of the present invention and method.
Fig. 5 shows the schematic diagram according to the operating principle of screening circuit 47 of the present invention.Cause for the purpose of simplifying the description is an example with coil B only in Fig. 5.Because the operating principle of loop A and coil C is identical with the operating principle of coil B, so those skilled in the art just can implement the integrated operation of the present invention in the three-phase motor system with this without difficulty behind the example of reading coil B.Especially, though disclosed embodiment of this invention is a three-phase motor, can be applicable to more heterogeneous motor, and be not limited to the motor of any specific kenel according to screening circuit of the present invention and method.
When motor 41 runs steadilies, the end points Pb voltage of coil B as shown in Figure 5.In the first and the 6th phase place P-I and P-VI, the end points Pb of coil B is coupled to earth potential, so its voltage maintains earth potential.In the second and the 5th phase place P-II and P-V, the end points Pb of coil B is in floating state, so its voltage is being represented back electromotive force.In the 3rd and the 4th phase place P-III and P-IV, the end points Pb of coil B is coupled to supply-voltage source V
mSo its voltage maintains supply-voltage source V
mAs previously mentioned, at the initial stage of the second phase place P-II, the end points Pb voltage of coil B is from earth potential moment high jump and than supply-voltage source V
mMore exceed a diode forward conduction voltage drop.Similarly, at the initial stage of the 4th phase place P-IV, the end points Pb voltage of coil B is from supply-voltage source V
mMoment descend and than earth potential lower a diode forward conduction voltage drop.
In comparison circuit 45, the end points Pb voltage of coil B and reference voltage V
RefMutually relatively.In the example that uses the linear mode CD-ROM drive motor, reference voltage V
RefCan implement by the voltage of direct detecting coupling central point N, perhaps only use supply-voltage source V merely
mHalf approximation as central point N voltage.In the example that uses pulse width modulation (pulse widthmodulation) mode CD-ROM drive motor, reference voltage V
RefCan implement by predetermined bucking voltage, for example United States Patent (USP) the 6th, 633, and No. 145 disclosed detecting modes are incorporated the document herein into as a reference here.
Examine Fig. 5 can find coil B be in floating state during in, no matter that is be the second phase place P-II or the 5th phase place P-V, reference voltage V all can take place to pass for twice in the end points Pb voltage of coil B
RefSituation.In the second phase place P-II, after the inductive current of the acute variation that causes the initial stage of floating was got rid of fully, the end points Pb voltage of coil B promptly was returned to reference voltage V for instance
RefBelow, ZC1 more takes place to hand over for the first time this moment.Subsequently, the end points Pb voltage of coil B rises gradually and passes reference voltage V once more
Ref, ZC2 more takes place to hand over for the second time this moment.Therefore, handing over for the first time and getting over ZC1 is the caused null event of crossing of initial stage noise, and ZC2 is only the mistake null event that can be used to control commutation and hand over more for the second time.No matter owing to the type of drive of motor, running speed, how to change with load state, have only to hand over for the second time to be only the mistake null event that can be used to control commutation more, be used for filtering out the ZC2 more of friendship for the second time so screening circuit 47 according to the present invention is based on this observation design.In other words, screening circuit 47 receives successively to be handed over comparison circuit 45 exported more ZC1 for the first time and hands over ZC2 more for the second time, just produces index signal when ZC2 takes place more to trigger drive signal combiner circuit 46 and have only to hand over for the second time by the time.By screening circuit 47, what no sensor motor control circuit 40 according to the present invention need not use known technology covers circuit 34, thereby needn't worry to cover fully the problem of the acute variation at the initial stage of floating.
Fig. 6 (A) shows the detailed circuit diagram according to first example of screening circuit 60 of the present invention.Comparison circuit 45 is implemented by the first comparator 45a and the second comparator 45b, is used to judge that the end points Pb voltage of coil B is to be greater than or less than reference voltage V
RefThe output of first and second comparator 45a and 45b is anti-phase relation just each other.NAND gate 61 and 62 is cross-couplings and a latch structure forming.The output signal K1 of NAND gate 61 is applied to the clock end Ck of D flip-flop 63, and the output signal K2 of NAND gate 62 then is applied to the clock end Ck of D flip-flop 64.D flip-flop 63 and 64 reset terminal R are controlled by the inversion signal of drive signal BD.Drive signal BD can be provided by drive signal combiner circuit 46, and wherein drive signal BD is in low level interval scale coil B and is in floating state.D flip-flop 63 and 64 output signal K3 and K4 are through NAND gate 65 and the clock end Ck of control toggle flip-flop 66.Therefore, toggle flip-flop 66 output zero passage index signal IZC are used to be fed to drive signal combiner circuit 46 suitably to control the commutation operation of motor.
Fig. 6 (B) shows the operation waveform sequential chart according to first example of screening circuit 60 of the present invention.At time t1, the end points Pb voltage of coil B is less than reference voltage V
RefSo the output signal K1 of NAND gate 61 is in high level, the output signal K2 of NAND gate 62 then is in low level.At time t2, coil B enters floating state, so the high jump of end points Pb voltage instantaneous surpasses reference voltage V
RefAt time t3, hand over ZC1 generation more for the first time, make the output signal K3 transition of D flip-flop 63 arrive high level.Yet this moment, the output signal K4 of D flip-flop 64 still maintained low level, so toggle flip-flop 66 is not triggered.At time t4, hand over ZC2 generation more for the second time, make the output signal K4 transition of D flip-flop 64 arrive high level.At this moment, because the output signal K3 and the K4 of D flip-flop 63 and 64 are high level, so being triggered, toggle flip-flop 66 make zero passage index signal IZC transition to high level.Therefore, screening circuit 60 filters out effectively and hands over the commutation of getting over ZC2 and correctly controlling motor for the second time.At time t5, drive signal BD to high level, makes the output signal K3 of D flip-flop 63 and 64 and K4 be reset to low level from the low level transition, with preparation screening operation next time.
At time t6, coil B enters floating state, so end points Pb voltage instantaneous descends and is lower than reference voltage V
RefAt time t7, hand over ZC1 generation more for the first time, make the output signal K4 transition of D flip-flop 64 arrive high level.Yet this moment, the output signal K3 of D flip-flop 63 still maintained low level, so toggle flip-flop 66 is not triggered.At time t8, hand over ZC2 generation more for the second time, make the output signal K3 transition of D flip-flop 63 arrive high level.At this moment, because the output signal K3 and the K4 of D flip-flop 63 and 64 are high level, so being triggered, toggle flip-flop 66 make zero passage index signal IZC transition to low level.Therefore, screening circuit 60 filters out effectively and hands over the commutation of getting over ZC2 and correctly controlling motor for the second time.At time t9, drive signal BD to high level, makes the output signal K3 of D flip-flop 63 and 64 and K4 be reset to low level from the low level transition, with preparation screening operation next time.
Fig. 7 shows the detailed circuit diagram according to second example of screening circuit 70 of the present invention.The screening circuit 70 of second example mainly comprises sampling record circuit 71 and sample set analysis circuit 72.Sampling record circuit 71 is taken a sample and record to the comparison signal that compares circuit 45 according to preset clock signal CLK, has the sample set [X1, X2, X3] of three samples with formation.Subsequently, sample set analysis circuit 72 is analyzed for the sample set that is write down [X1, X2, X3], hands over more ZC1 for the first time and selects and hand over more ZC2 as the mistake null event that can be used to control commutation for the second time to reject.Please note that the frequency of clock signal clk is high more in the example that uses the linear mode CD-ROM drive motor, sampling density is big more, can reduce error range more.In the example that uses the pulse width modulation CD-ROM drive motor, clock signal clk can directly use the pulse width modulation clock signal.
In first step, sampling record circuit 71 will also not enter end points Pb voltage and the reference voltage V of the coil B before the floating state
RefBetween comparison signal note as the first element X1.In second step, after coil B had entered floating state, 71 two consecutive cycles according to clock signal clk of sampling record circuit took a sample and record to the comparison signal that compares circuit 45, successively as second element X2 and the element X3.Thus, sampling record circuit 71 has just formed the sample set [X1, X2, X3] with three elements.In third step, sample set analysis circuit 72 judges whether these sample sets [X1, X2, X3] meet [L, L, H] or [H, H, L] any arrangement among both, and wherein L represents low level and H represents high level.If do not meet, then later repeat second step, upgrade second element X2 and the element X3 according to clock signal clk.Please note the value that the first element X1 still maintains in the first step to be write down.In case sample set [X1, X2, X3] meets [L, L, H] or [H, H, L] any arrangement among both, sample set analysis circuit 72 is just judged and is handed over the generation of ZC2 more for the second time.
The screening technique of second example can refer back to Fig. 5 and obtain tangible checking.As shown in Figure 5, suppose that coil B is coupled in earth potential before entering floating state, that is be in the first phase place P-I that then the first element X1 that noted down of sampling record circuit 71 is low level L in first step.Coil B subsequently is among the second phase place P-II of floating state, hands over for the first time end points Pb voltage that ZC1 more occurs in coil B from greater than reference voltage V
RefBe transformed into less than reference voltage V
RefSituation.Therefore, the second element X2 of institute's sampling record is high level H before the ZC1 generation is got in the friendship first time, and the element X3 of institute's sampling record is low level L after the ZC1 generation is got in friendship for the first time.Yet, hand over for the second time end points Pb voltage that ZC2 more occurs in coil B from less than reference voltage V
RefBe transformed into greater than reference voltage V
RefSituation.Therefore, the second element X2 of institute's sampling record is low level L before the ZC2 generation is got in the friendship second time, and the element X3 of institute's sampling record is high level H after the ZC2 generation is got in friendship for the second time.Hence one can see that, in the second phase place P-II, is only indication and hands over the generation of ZC2 more for the second time when the sample set that is write down is [L, L, H].
Similarly, suppose that coil B is coupled in supply-voltage source V before entering floating state
m, that is be in the 4th phase place P-IV, then the first element X1 that noted down in first step of sampling record circuit 71 is high level H.Coil B subsequently is among the 5th phase place P-V of floating state, hands over for the first time end points Pb voltage that ZC1 more occurs in coil B from less than reference voltage V
RefBe transformed into greater than reference voltage V
RefSituation.Therefore, the second element X2 of institute's sampling record is low level L before the ZC1 generation is got in the friendship first time, and the element X3 of institute's sampling record is high level H after the ZC1 generation is got in friendship for the first time.Yet, hand over for the second time end points Pb voltage that ZC2 more occurs in coil B from greater than reference voltage V
RefBe transformed into less than reference voltage V
RefSituation.Therefore, the second element X2 of institute's sampling record is high level H before the ZC2 generation is got in the friendship second time, and the element X3 of institute's sampling record is low level L after the ZC2 generation is got in friendship for the second time.Hence one can see that, in the 5th phase place P-V, is only indication and hands over the generation of ZC2 more for the second time when the sample set that is write down is [H, H, L].
Referring again to Fig. 7, sampling record circuit 71 mainly comprises Port Multiplier 73 and three D flip-flop F1 to F3.Drive signal BD is applied to the selecting side S of Port Multiplier 73, and through anti-phase after-applied clock end Ck to D flip-flop F1.Drive signal BD can be provided by drive signal combiner circuit 46, and wherein drive signal BD is in low level interval scale coil B and is in floating state.When drive signal BD was in high level, Port Multiplier 73 allowed the inversion signal of zero passage index signal IZC to pass through.When drive signal BD was in low level, Port Multiplier 73 allowed the comparison signal of comparison circuit 45 to pass through.D flip-flop F1 operates according to drive signal BD, so can write down the first element X1 before the floating state.D flip-flop F2 and F3 operate according to clock signal clk, write down second element X2 and the element X3 successively, thus the second element X2 than element X3 Zao the cycle of a clock signal clk.Sample set analysis circuit 72 mainly comprises logical circuit 74 and D flip-flop F4.First is applied to whether logical circuit 74 meets [L, L, H] or [H, H, L] to analyze it arrangement to element X1 to X3.In other words, when the first element X1 is same as the second element X2 and the second element X2 when being different from element X3, the output of logical circuit 74 promptly becomes high level from the low level transition, and representative detects and hands over the generation of ZC2 more for the second time.Because the output of logical circuit 74 is applied to the clock end Ck of D flip-flop F4, so when logical circuit 74 detected the generation of handing over ZC2 more for the second time, D flip-flop F4 was promptly triggered and makes zero passage index signal IZC transition.Therefore, screening circuit 70 filters out effectively and hands over the commutation operation of getting over ZC2 and correctly controlling motor for the second time.
Though the present invention is illustrated as illustration by preferred embodiment, will be appreciated that: the present invention is not limited to embodiment disclosed herein.On the contrary, to want to contain be tangible various modification and similar configuration to those skilled in the art in the present invention.Therefore, the scope of claims should be according to the widest annotation, and this type of is revised and similar configuration to contain all.
Claims (10)
1, a kind of motor control circuit is applied to have the motor of a plurality of coils, comprises:
Circuit for detecting is coupled in this a plurality of coils, is used to produce detection signal, and it is an end-point voltage that is chosen to be the coil of floating state that is associated with in these a plurality of coils;
Comparison circuit is coupled in this circuit for detecting so that relatively this detection signal and reference voltage and produce comparison signal;
Screen circuit, be coupled in this comparison circuit so that receive this comparison signal, wherein this screening circuit is that the friendship first time that receives this comparison signal is successively handed over more more with for the second time, and hands over for the second time more and the generation index signal in response to this; And
Drive circuit is controlled the commutation operation of this motor in response to this index signal.
2, motor control circuit according to claim 1, wherein:
This comparison signal has first state and second state, and this first state represents this detection signal greater than this reference voltage, and this second state represents this detection signal less than this reference voltage, and
This hand over for the first time be associated with more this comparison signal from this first state exchange to this second state, and hand over this second time be associated with more this comparison signal from this second state exchange to this first state.
3, motor control circuit according to claim 1, wherein:
This comparison signal has first state and second state, and this first state represents this detection signal greater than this reference voltage, and this second state represents this detection signal less than this reference voltage, and
This hand over for the first time be associated with more this comparison signal from this second state exchange to this first state, and hand over this second time be associated with more this comparison signal from this first state exchange to this second state.
4, motor control circuit according to claim 1, wherein:
This reference voltage is to produce by the voltage of detecting one of these a plurality of coils coupling central point.
5, motor control circuit according to claim 1, wherein:
This reference voltage is implemented by predetermined magnitude of voltage.
6, motor control circuit according to claim 1, wherein:
This screening circuit comprises:
The sampling record circuit, be used for taking a sample for this comparison signal according to preset clock signal, and write down first element, second element, with element, wherein this first element before this coil that is chosen to be floating state enters this floating state, take a sample the record, this second element and this element then all are the records of taking a sample when the coil that is chosen to be floating state has entered this floating state, and
Analysis circuit is used to analyze this first element, this second element, filters out this with this element and hand over for the second time more.
7, motor control circuit according to claim 6, wherein:
This element is to take a sample in the present cycle of this clock signal to note down, and this second element is to take a sample in the last cycle in this present cycle to note down.
8, motor control circuit according to claim 6, wherein:
This analysis circuit is same as this second element and this second element analysis rule in element inequality according to this first element and filters out this and hand over for the second time more.
9, a kind of motor control method is applied to have the motor of a plurality of coils, comprises:
Detect in these a plurality of coils one be chosen to be floating state coil an end-point voltage and produce detection signal;
Relatively this detection signal and reference voltage and produce comparison signal, this comparison signal has to hand over more with for the second time for the first time to be handed over more;
Hand over for the first time from this and to filter out this handing over more for the second time with this more and hand over for the second time more;
Hand over for the second time more and the generation index signal in response to this; And
Control the commutation operation of this motor in response to this index signal.
10, a kind of zero passage circuit for detecting is used to control the commutation operation of motor, comprises:
First circuit is used to produce first signal, and it represents the back electromotive force of the coil that is in floating state of this motor;
Second circuit is used for relatively this first signal and reference voltage and produces secondary signal, and this secondary signal has to be handed over for the first time more and hand over more for the second time; And
Tertiary circuit receives this successively and hands over for the first time more and hand over more for the second time with this, and hands over for the second time in response to this and to produce the 3rd signal more, and the 3rd signal is used to control this commutation operation of this motor.
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| CNB2005101138039A CN100433534C (en) | 2005-10-12 | 2005-10-12 | Non-sensor motor control circuit without mask program |
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| CNB2005101138039A CN100433534C (en) | 2005-10-12 | 2005-10-12 | Non-sensor motor control circuit without mask program |
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| CN100433534C CN100433534C (en) | 2008-11-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499756B (en) * | 2008-02-01 | 2012-02-29 | 远翔科技股份有限公司 | Method for controlling a DC brushless motor and circuit therefor |
| CN104426441B (en) * | 2013-09-02 | 2017-04-26 | 茂达电子股份有限公司 | Fan system, single-phase direct current motor control circuit and control method thereof |
| TWI804957B (en) * | 2021-08-23 | 2023-06-11 | 致新科技股份有限公司 | Motor controller |
| US11699964B2 (en) | 2021-08-23 | 2023-07-11 | Global Mixed-Mode Technology Inc. | Motor controller |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3348296B2 (en) * | 1992-07-31 | 2002-11-20 | ソニー株式会社 | Drive device for sensorless motor |
| IT1296016B1 (en) * | 1997-04-29 | 1999-06-04 | Sgs Thomson Microelectronics | METHOD OF DETECTION OF A CURRENT ZERO-CROSSING EVENT CROSSING AN INDUCTIVE LOAD AND OPTIMIZATION OF A |
| EP1121753B1 (en) * | 1998-10-12 | 2004-03-31 | DANFOSS COMPRESSORS GmbH | Method and device for controlling a brushless electric motor |
| US6218795B1 (en) * | 1998-12-17 | 2001-04-17 | Matsushita Electric Industrial Co., Ltd. | Rotor magnetic pole position detection device |
| JP2000245190A (en) * | 1999-02-23 | 2000-09-08 | Matsushita Electric Ind Co Ltd | Apparatus and method for controlling driving of brushless motor |
| JP2000262084A (en) * | 1999-03-05 | 2000-09-22 | Matsushita Electric Ind Co Ltd | Controller for brushless motor |
| DE69927373D1 (en) * | 1999-09-30 | 2005-10-27 | St Microelectronics Srl | Shock-free detection of current or voltage signals on winding operated with pulse-change modulation |
| JP2001119984A (en) * | 1999-10-21 | 2001-04-27 | Matsushita Electric Ind Co Ltd | Control device of brushless motor |
| US6979970B2 (en) * | 2003-06-30 | 2005-12-27 | Matsushita Electric Industrial Co., Ltd. | Sensorless motor driving device and its driving method |
| US6879124B1 (en) * | 2004-01-07 | 2005-04-12 | Quan Jiang | Method to detect the true zero-crossing points of the phase back EMF for sensorless control of brushless DC motors |
-
2005
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499756B (en) * | 2008-02-01 | 2012-02-29 | 远翔科技股份有限公司 | Method for controlling a DC brushless motor and circuit therefor |
| CN104426441B (en) * | 2013-09-02 | 2017-04-26 | 茂达电子股份有限公司 | Fan system, single-phase direct current motor control circuit and control method thereof |
| TWI804957B (en) * | 2021-08-23 | 2023-06-11 | 致新科技股份有限公司 | Motor controller |
| US11699964B2 (en) | 2021-08-23 | 2023-07-11 | Global Mixed-Mode Technology Inc. | Motor controller |
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| CN100433534C (en) | 2008-11-12 |
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