CN1224164C - Primary starting method for switch reluctance machine - Google Patents
Primary starting method for switch reluctance machine Download PDFInfo
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- CN1224164C CN1224164C CNB011363738A CN01136373A CN1224164C CN 1224164 C CN1224164 C CN 1224164C CN B011363738 A CNB011363738 A CN B011363738A CN 01136373 A CN01136373 A CN 01136373A CN 1224164 C CN1224164 C CN 1224164C
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- inductance
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Abstract
The present invention discloses a primary starting method for a switch reluctance motor. In the primary stage, the rotor of the motor does not need to be fixed in a positioning position but is moved so as to drive the switch reluctance motor according to the increasing direction of electrical inductance. The concrete implementation method of the present invention comprises the following steps: step1, a pulse of definite width is applied to each phase, the phase winding current of the motor is detected, the order of priority of the electrical inductance is determined according to the detected current of each phase, and a primary rotating pulse is applied; step 2, after interrupt signals that can be identified are led in from a sensor, a pulse of definite width is applied to each phase, and the current is detected again; step 3, the current detected in the second step is brought into comparison, and after the order of priority of the electrical inductance on each phase is determined on the basis of the comparison, a rotating pulse is applied immediately so as to drive the motor. When the motor is started according to the method of the present invention, the rotor does not need to be fixed in the positioning position, the position of the rotor can be directly detected, and the motor can be driven; thereby, the primary starting method can shorten the starting time and reduce the noise generated when the motor is started.
Description
Technical field
The present invention relates to a kind of startup method of motor, particularly relate to a kind of primary starting method that is used for switch reluctance machine.
Background technology
Fig. 1 for rotor and stator poles than the winding that is the existing switch reluctance machine of 6/4 or 12/8 structure.Fig. 2 is the circuit diagram that a profit can detect above-mentioned switch reluctance machine electric current.Switch element Q
1～Q
6Be connected in the upper and lower of motor each phase winding La, Lb, Lc, each diode D
1～D
6Be connected in side by side between motor windings La, Lb, Lc and the power supply, the resistance R d that can detect three-phase current then is connected in the switch element Q of each phase bottom
2, Q
4And Q
6On.Fig. 3 is the another kind of circuit diagram that can detect above-mentioned switch reluctance machine electric current.Its basic structure is identical with Fig. 2, unique different be the resistance R d that can detect each phase current
1, Rd
2And Rd
3Respectively with each switch element Q of bottom mutually
2, Q
4And Q
6Link.Under above-mentioned switch reluctance machine situation, when if rotor is not positioned the position location of a certain relatively phase fully before starting, so, this is mutually relatively, rotor just can't be adjusted on the correct positioning position, thereby motor also just can't normally start.Though can adopt phase to A according to Fig. 4, the B phase, C adjusts mutually in order maybe can be by the A phase, the order of B phase is adjusted two phase sequences together, the method of avoiding misprinting row simultaneously is positioned rotor desirablely to go up mutually, promptly desired location mutually on apply the pulse of certain width, make electric current flow through this phase, the pulsewidth and the time interval are all longer during beginning, through behind certain number of times, pulsewidth shortens gradually, after reaching the desirable time interval, just can form the location on mutually at this, increase with the increase of load inertia but the shortcoming of this method is required time of location, and problems such as noise is big may occur during making current.
Summary of the invention
The object of the present invention is to provide a kind of primary starting method rapid and switch reluctance machine that noise is low that starts.
For achieving the above object, solution of the present invention is: the stator of switch reluctance machine is 6/4 or 12/8 with rotor number of poles ratio, and uses a transducer to be used for detecting interruption.Be electric current on the phase winding that detects switch reluctance machine, apply the pulse of certain width on mutually, the inductance priority that produces by detected each phase current applies the initial stage rotary pulse at each, and this is first process; After introducing interrupt signal from transducer, apply the pulse of certain width and detect each phase current on mutually again, this is second process at each; Detected each phase current in above-mentioned second process is compared, and determine the inductance priority that forms on mutually in view of the above, apply rotary pulse immediately and motor is rotated, this is the 3rd process at each.
For detecting pulse-width restricting that electric current applies in the scope that does not cause rotor to rotate.
Be to go up mutually at each to apply in turn when first process applies rotary pulse with the 3rd process once to pulse for several times.
Current detecting is to carry out in the moment that applies pulse to pulse is time between zero.
For making the rotor forward rotation, representing respectively with first inductance, second inductance and the 3rd inductance under different three pole reactors and first inductance＞second inductance＞the 3rd inductance situation, if the numerical value after the difference of first inductance and second inductance and first inductance are divided by is less than set-point, then the 3rd inductance mutually on apply rotary pulse.
For making the rotor forward rotation, representing respectively with first inductance, second inductance and the 3rd inductance under different three pole reactors and first inductance＞second inductance＞the 3rd inductance situation, if the numerical value after the difference of first inductance and second inductance and first inductance are divided by is greater than set-point, then second inductance mutually on apply rotary pulse.
Described set-point is 0.2～0.5.
During according to method starter motor of the present invention, need not the position fixing process of rotor, and can directly detect the position of rotor, and drive, therefore can shorten start-up time, and can reduce the noise that produces when starting.
Description of drawings
Fig. 1 is the switch reluctance machine winding schematic diagram of original 6/4 structure and 12/8 structure.
Fig. 2 is the example circuit diagram of sense switch magneto-resistance motor electric current.
Fig. 3 is the another kind of example circuit diagram of sense switch magneto-resistance motor electric current.
Fig. 4 is the rotor station-keeping mode schematic diagram of original switch reluctance machine.
Fig. 5 is the primary starting method action flow chart of switch reluctance machine of the present invention.
Fig. 6 is corresponding each the phase inductance formation figure of switch reluctance machine three-phase rotor of the present invention with 12/8 structure winding.
Fig. 7 determines that for the startup method that adopts switch reluctance machine of the present invention the initial stage rotary pulse applies the formation figure of phase.
Fig. 8 applies burst length and current detecting time relation formation figure among Fig. 5.
Fig. 9 interrupts producing the pattern diagram of back by separate tested in sequence electric current among Fig. 5.
Embodiment
With reference to the accompanying drawings the specific embodiment of the present invention is elaborated.
Fig. 5 is the action flow chart relevant with the primary starting method of switch reluctance machine of the present invention.As shown in the figure, in order to detect the phase winding electric current of switch reluctance machine, in each pulse that applies certain width on mutually, decide the inductance priority of generation according to detected each phase current, and apply the initial stage rotary pulse, this is first process; After introducing interrupt signal from transducer, apply the pulse of certain width on mutually, and carry out each phase current again and detect, this is second process at each; Detected each phase current in above-mentioned second process is compared, and determine the inductance priority that forms on mutually in view of the above, apply rotary pulse immediately and motor is rotated, this is the 3rd process at each.
In switch reluctance machine, the inductance of a certain phase is that the relative position by stator and rotor decides, and Fig. 6 illustrates corresponding each phase inductance of rotor-position of the threephase switch magneto-resistance motor with 12/8 structure winding.
The voltage equation of switch reluctance machine when state of termination is V=Ldi/dt, and its each electric current of going up mutually can be represented by following formula:
I＝∫V/L?dt (1)
Wherein: the voltage that V-applies on mutually;
Phase winding electric current when I-applies voltage;
The inductance that L-is decided by the relative position of rotor and stator.
In formula 1, when applying the pulse of certain width, the size of electric current is just decided by inductance, and is inversely proportional to inductance, promptly each to go up the distance of the size of electric current and location mutually approaching more more little, and with to misprint column position approaching more big more; Therefore, inductance is big more, and electric current is just more little.
The present invention mainly utilizes above-mentioned characteristic to carry out, referring to Fig. 5, apply the pulse of certain width on mutually in each of switch reluctance machine, detect the electric current on each phase winding then, promptly mutually for A, after this applies the pulse of certain width on mutually,, detect this electric current of going up mutually and preserve through behind the certain hour; B phase, C are also carried out same processing mutually, and the electric current that each is gone up mutually compares then, just can determine to apply the phase of initial stage rotary pulse thus.Introduce interrupt signal from transducer then, apply the pulse of certain width and detect corresponding electric current on mutually at each again, detected electric current is compared, determine the priority of each phase inductance, apply rotary pulse immediately, make the motor rotation.
Be to go up mutually at each to apply in turn when first process applies rotary pulse with the 3rd process once to pulse for several times.As shown in Figure 8, detect electric current and be in the moment that applies pulse to pulse is time between zero and carry out, and in each pulse duration that applies on mutually should be limited in the scope that rotor do not rotate.
For this reason, do not need rotor is located.For making the rotor forward rotation, pulse should be put on inductance simultaneously by going up mutually that forward increases.In case determine the inductance priority that each phase current produces, as shown in Figure 6, just can decide the phase that applies pulse along direction as shown in the early stage by the priority of above-mentioned inductance.
Here, if consider from the performance and the resolution capability of microprocessor, the position in " first ", " second ", " third ", " fourth " " penta ", " the sixth of the twelve Earthly Branches " is corresponding among the commutative part of its inductance priority and Fig. 6, though the inductance priority of wherein " second ", " fourth ", " the sixth of the twelve Earthly Branches " part is commutative, can not change the phase that applies pulse in the early stage.With regard to " second " part, no matter the priority of inductance is (to apply the phase of pulse: B) (apply the phase of pulse: B) change to A＞B＞C from A＞C＞B, still (apply the phase of pulse: B) (apply the phase of pulse: B) change, what apply pulse in the early stage is not change mutually to A＞C＞B from A＞B＞C.
Since it is so, with above-mentioned Fig. 6 in " first ", " third ", " defending " corresponding to part, if the priority of inductance changes, the phase that applies pulse in the early stage is respective change also.With " first " part is example, no matter the priority of inductance is (to apply the phase of pulse: A) (apply the phase of pulse: B) change to A＞C＞B from C＞A＞B, still (apply the phase of pulse: B) (apply the phase of pulse: A) change, all can apply the variation of the phase of pulse in the early stage from A＞C＞B to C＞A＞B.
Therefore, only consider that above-mentioned factor can determine to apply the phase of initial stage pulse, promptly after determining good inductance priority, if bigger two-phase difference in inductance is less than set-point, just can confirm two kinds of possible inductance priorities, for these two kinds of inductance priorities, can inductance increase mutually on apply rotary pulse; If difference in inductance is greater than set-point, just can by determine good inductance priority the inductance increase mutually on apply pulse.
With " first " part among Fig. 6 be example, is under C＞A＞B situation in the inductance priority, if (Lc-La)/Lc is greater than set-point, the priority of inductance just can determine by C＞A＞B, just can apply pulse on mutually at A in the early stage.
If (Lc-La)/Lc is less than set-point, the priority of inductance press A＞C＞B or C＞A＞B can, pulse can be put on the B phase that inductance increases in both cases.This moment to inductance increase mutually on when applying pulse, should introduce and the pulse interrupted for 2～3 times occurs.
The performance that depends on microprocessor, above-mentioned set-point can be set by 0.2～0.5.
In definite inductance priority stage, if adopt said process, just can determine that the initial stage applies the phase of pulse according to Fig. 7, if determined good this phase, can apply the pulse that can adjust by about 45 mechanical angles of spending (360 spend electrical degree).
On the winding of 12/8 structure, if the interrupt signal of introducing from transducer takes place by per 15 mechanical angles of spending, rotor then turns round by 2～3 times the angle at this angle, after interrupt signal produces, by separate tested in sequence electric current, motor is normally turned round again.
As shown in Figure 9, after above-mentioned interruption produces,, at first be when interrupting taking place, to detect by its electric current of separate tested in sequence, even very little also should being easy to of inductance this moment detects, and after interrupting producing, confirm the priority of inductance thus.If in every pulse that applies on mutually is 1～2 time, motor just can be fully backward rotation not.
Claims (7)
1, a kind of primary starting method that is used for switch reluctance machine, the stator of this motor is 6/4 or 12/8 with rotor number of poles ratio, and use a transducer to be used for detecting interruption, it is characterized in that: be electric current on the phase winding that detects switch reluctance machine, apply the pulse of certain width on mutually at each, the inductance priority that produces by detected each phase current applies the initial stage rotary pulse, and this is first process; After introducing interrupt signal from transducer, apply the pulse of certain width and detect each phase current on mutually again, this is second process at each; Detected each phase current in above-mentioned second process is compared, and determine the inductance priority that forms on mutually in view of the above, apply rotary pulse immediately and motor is rotated, this is the 3rd process at each.
2, the primary starting method that is used for switch reluctance machine according to claim 1 is characterized in that: for detecting pulse-width restricting that electric current applies in the scope that does not cause rotor to rotate.
3, the primary starting method that is used for switch reluctance machine according to claim 1 is characterized in that: be to go up mutually to apply in turn once to pulse for several times when first process applies rotary pulse with the 3rd process at each.
4, the primary starting method that is used for switch reluctance machine according to claim 1 is characterized in that: current detecting is to carry out in the moment that applies pulse to pulse is time between zero.
5, the primary starting method that is used for switch reluctance machine according to claim 1, it is characterized in that: for making the rotor forward rotation, representing respectively with first inductance, second inductance and the 3rd inductance under different three pole reactors and first inductance＞second inductance＞the 3rd inductance situation, if the numerical value after the difference of first inductance and second inductance and first inductance are divided by is less than set-point, then the 3rd inductance mutually on apply rotary pulse.
6, the primary starting method that is used for switch reluctance machine according to claim 1, it is characterized in that: for making the rotor forward rotation, representing respectively with first inductance, second inductance and the 3rd inductance under different three pole reactors and first inductance＞second inductance＞the 3rd inductance situation, if the numerical value after the difference of first inductance and second inductance and first inductance are divided by is greater than set-point, then second inductance mutually on apply rotary pulse.
7, according to claim 5 or the 6 described primary starting methods that are used for switch reluctance machine, it is characterized in that: described set-point is 0.2～0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011363738A CN1224164C (en) | 2001-10-12 | 2001-10-12 | Primary starting method for switch reluctance machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011363738A CN1224164C (en) | 2001-10-12 | 2001-10-12 | Primary starting method for switch reluctance machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1412938A CN1412938A (en) | 2003-04-23 |
| CN1224164C true CN1224164C (en) | 2005-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011363738A Expired - Fee Related CN1224164C (en) | 2001-10-12 | 2001-10-12 | Primary starting method for switch reluctance machine |
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| CN (1) | CN1224164C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333517C (en) * | 2005-07-11 | 2007-08-22 | 中国矿业大学 | Method for starting and controlling switch reluctance motor no-rotor position sensor |
| CN100350736C (en) * | 2005-07-19 | 2007-11-21 | 中国矿业大学 | Switch reluctance generator excitation electricity-generating control method |
| CN102082536B (en) * | 2010-12-27 | 2012-06-13 | 东南大学 | Method for launching three-phase switched reluctance motor (SRM) |
| CN106640613B (en) * | 2016-11-15 | 2018-03-23 | 广州视源电子科技股份有限公司 | Startup method, system and the equipment of compressor |
| CN114257140B (en) * | 2020-09-25 | 2024-05-31 | 苏州福瑞思信息科技有限公司 | Brushless DC motor starting device and starting method |
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2001
- 2001-10-12 CN CNB011363738A patent/CN1224164C/en not_active Expired - Fee Related
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|---|---|
| CN1412938A (en) | 2003-04-23 |
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