CN1242543C - Method for detecting position signal of switch reluctance machine - Google Patents
Method for detecting position signal of switch reluctance machine Download PDFInfo
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- CN1242543C CN1242543C CNB011363665A CN01136366A CN1242543C CN 1242543 C CN1242543 C CN 1242543C CN B011363665 A CNB011363665 A CN B011363665A CN 01136366 A CN01136366 A CN 01136366A CN 1242543 C CN1242543 C CN 1242543C
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Abstract
The present invention relates to a method for detecting exception in position signals of a switched reluctance motor. In the method, the position of a rotor is detected by a position sensor on a device which is composed of a power supply circuit, a microcomputer and a driving circuit of a switched reluctance motor, wherein the microcomputer controls power supply circuits; a pulse signal associated with the position is added to a corresponding switching device to measure the current value of the corresponding switching device; the measured current value is compared with a reference current value; the application of pulses is continued so as to perform operation in the normal state when the measured current value is larger than the reference current value in a comparative result; the application of pulse current is stopped when the measured current value is smaller than the reference current value in the comparative result, and the normal operating state is restored according to the appropriate application of a pulse signal in the rotating direction. The present invention can detect exception in position signals through current applied to each phase when the switched reluctance motor normally operates in the controlled state; thereby, the position of the current phase can be accurately mastered, and the drive of the switched reluctance motor can be stably controlled.
Description
Technical field
The position signalling that the present invention relates to a kind of switched reluctance machines has N/R detection method, particularly about under the switched reluctance machines normal operation, detects the detection method whether unusually its position signalling makes switched reluctance machines more stably drive.
Background technology
General switched reluctance machines will have position signalling when driving, by position transducer grasp exactly motor just/despun change starting point, can the control switch reluctance motor just/despining.Adopt N position transducer for N phase switch reluctance motor, grasp and control switch reluctance motor just/despining.Usually in order to save cost, the threephase switch reluctance motor is only used a position transducer, and switched reluctance machines position to rotor in operation process is followed the tracks of memory constantly, just as incremental recorder, when the occurrence positions signal, the conversion rotation is judged mutually, controls the driving of each phase.But the position signalling that utilizes position transducer to send is controlled the driving of switched reluctance machines, if it is no abnormal to judge that the position signalling that sends from position transducer has, then can cause the problem of switched reluctance machines misoperation.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of under switched reluctance machines normal operation state of a control, to come the detection position signal to have no abnormal by being applied to electric current that each goes up mutually, and the position signalling of switched reluctance machines of holding the position of present phase exactly has N/R detection method.
The technical solution adopted in the present invention is: a kind of position signalling of switched reluctance machines has N/R detection method, on the device that constitutes by the power-supply circuit of switched reluctance machines, the microcomputer of controlling the output voltage of this power-supply circuit, drive circuit, be achieved as follows step: the first step detects the position of rotor by position transducer, and second step will the pulse signal relevant with this position be applied on the corresponding switching device in the above-mentioned drive circuit; The 3rd pacing goes out the current value on the respective switch device in the above-mentioned drive circuit behind the certain hour; The 4th step compared the above-mentioned current value that measures and reference current value, if the current value ratio reference current value that measures is big, then entering for the 5th step continues to add pulse execution normal condition and turn round; If the current value ratio reference current value that measures is little, then enter the 6th the step stop to add pulse current, entered for the 7th step then, the 7th the step add suitable pulse signal according to direction of rotation, make motor return to normal operation.
Method of the present invention can be under switched reluctance machines runs well slave mode, by be applied to each current detecting position signalling of going up mutually have no abnormal, the position that can hold current phase exactly, the more stably driving of control switch reluctance motor.
Description of drawings
Fig. 1: the power circuit of the switched reluctance machines of 6/4 structure in the prior art
Fig. 2: the workflow diagram that has or not method for detecting abnormality for switched reluctance machines position signalling of the present invention
Fig. 3:, show position signalling and detect the oscillogram of electric current for Fig. 2.
Embodiment
Provide specific embodiment below in conjunction with accompanying drawing, further specify the present invention and how to realize.
Fig. 1 is the power-supply circuit and the drive circuit figure of the switched reluctance machines of general 6/4 structure of tool, as shown in the figure, has following structure: the control power supply device 11 that applies voltage successively to motor coil; Apply signal changes voltage control between 15 volts-40 volts microcomputer 12 to above-mentioned control power supply device; Detect the position of motor internal rotor, and position transducer Sa, the Sb of the position signalling of output rotor, Sc and by according to above-mentioned rotor-position signal switching device being carried out the basic drive circuit 13 that the PNP switching device of on/off switch constitutes; The output interface of computer 12 links to each other with power supply 11, capacitor C 1, resistance R
2Be connected in parallel, two ends link to each other with power positive cathode, A, B, C three phase electric machine coil La, Lb, Lc are connected between three compound transistor Q1a, Q1b as switching device, Q1c collector electrode and the collector electrode as three compound transistor Q2a, Q2b of switching device, Q2c, are connected diode FRD respectively between the collector electrode of compound transistor Q1a, Q1b, Q1c emitter and compound transistor Q2a, Q2b, Q2c
3, FRD
5, FRD
7, be connected diode FRD respectively between the emitter of compound transistor Q1a, Q1b, Q1c collector electrode and compound transistor Q2a, Q2b, Q2c
2, FRD
4, FRD
6, be connected resistance R respectively between the collector electrode of compound transistor Q1a, Q1b, Q1c base stage and compound transistor Q2a, Q2b, Q2c
21, R
22, R
23, compound transistor Q1a, Q1b, Q1c emitter connect positive source, the grounded emitter of compound transistor Q2a, Q2b, Q2c.
In the drive circuit, capacitor C 1, resistance R
1, R
11, R
12, R
13All connect the 5V power supply, the other end ground connection of capacitor C 1, resistance R
1The other end connect pin 1 as the photoelectrical coupler PHOTO Sa of position transducer, resistance R
1, R
11, R
12, R
13The other end divide the photoelectrical coupler PHOTO Sa that connects in addition as position transducer, PHOTO Sb, the pin 3 of PHOTO Sc, three photoelectrical coupler PHOTO Sa as position transducer, PHOTO Sb, the pin 1 of PHOTOSc, pin 2 is end to end, pin 2 ground connection of PHOTO Sc wherein, three photoelectrical coupler PHOTO Sa, PHOTO Sb, the pin 4 equal ground connection of PHOTO Sc, switching device triode PNP1, PNP2, the base stage of PNP3 meets three photoelectrical coupler PHOTO Sa, PHOTO Sb, the pin 3 of PHOTO Sc, emitter connects the 5V power supply, collector electrode connects compound transistor Q2a respectively, Q2b, the base stage of Q2c, collector electrode are also by resistance R d1, Rd2, Rd3 ground connection.
At first, microcomputer 12 applies the signal that can change motor speed by its output port PORT1 to supply unit 11.
Above-mentioned control power supply device 11 is SMPS (SWITCHING MODE POWER SUPPLY).
The voltage of above-mentioned control power supply feedway 11 can change between 15 volts-40 volts, and the voltage that changes is supplied with switched reluctance machines (SRM), and the rotor of switched reluctance machines (SRM) can rotate thereupon, and its rotary speed can change.
At this moment pass through the position of position transducer Sa, Sb, Sc electrical detection rotor, promptly, detect the position transducer PHOTO Sa that signal output is gone up mutually at the A of basic drive circuit 13 behind the position of rotor, then PNP switching device PNP1 is switched on, and stator coil A is gone up mutually generate electric current.
Along with above-mentioned PNP switching device PNP1 is switched on, the signal Sa of high potential supplies with the base stage of the lower device Q2a of A phase, so, the lower device Q2a of above-mentioned A phase is switched on, at this moment, and along with the lower device Q2a of above-mentioned A phase is switched on, electric current is toward the ground wire shunting, apply low-potential signal by resistance R 21 to the base stage of the upper switches device Q1a of A phase, the upper switches device Q1a of above-mentioned A phase also is switched on, so on A phase motor coil L a current lead-through can be arranged.
The motor coil L a of above-mentioned A phase goes up the moment of conducting electric current, there is signal to take place on the B phase position transducer PHOTO Sb of door drive division 13, the position transducer PHOTO Sa of above-mentioned A phase is closed, PNP switching device PNP1 also is closed thereupon, so the switching device Q1a on the pent while top of the lower device Q2a of above-mentioned A phase also is closed, so motor coil L a goes up the magnetic flux that produces and removed by unidirectional diode FRD3, FRD2, motor will rotate reposefully.
The rotor-position signal that takes place on the B phase position transducer PHOTO Sb makes PNP switching device PNP2 conducting, along with the signal Sb of the conducting high potential of PNP switching device PNP2 supplies with the base stage of B phase lower device Q2b, above-mentioned B phase lower device Q2b is switched on.
Along with the lower device Q2b of above-mentioned B phase is switched on, electric current is shunted to ground wire, apply low-potential signal by resistance R 22 to the base stage of the upper switches device Q1b of B phase, the upper switches device Q1b of above-mentioned B phase also is switched on, so on B phase motor coil L b current lead-through can be arranged.
The motor coil L b of above-mentioned B phase go up the conducting electric current moment drive circuit 13 C phase position transducer PHOTO Sc signal takes place, upper and lower part switching device Q1, the Q2 of C phase are switched on, the motor coil L c of above-mentioned C phase goes up and forms electric current, makes motor quicken rotation.Carrying out such operating switch reluctance motor repeatedly can rotate.
That is, microcomputer is controlled the driving of its each phase from position transducer receiving position signal.
Fig. 2 is the workflow diagram that has or not method for detecting abnormality for switched reluctance machines position signalling of the present invention.As shown in the figure, the first step detects the position of rotor; In second step, apply the pulse signal relevant with this position; In the 3rd step, detect the electric current behind the certain hour; The 4th step will be above-mentioned detects current value and reference current value compares, if it is big to detect the current value ratio reference current value, then entered for the 5th step, continued to add pulse execution normal operation; If it is little to detect the current value ratio reference current value, then entered for the 6th step, entered for the 7th step after stopping to add pulse current, the 7th step added suitable pulse signal according to direction of rotation, made it return to normal operation.
At first, apply pulse signal a certain on mutually, position transducer is to a certain position signalling that takes place on the minimum point of induction coefficient shown in Fig. 3 (a), after microcomputer receives above-mentioned position signalling, control for driving, corresponding switching device is applied pulse signal next phase.
At this moment, after above-mentioned pulse signal is applied in, through behind the certain hour, detect electric current corresponding on mutually, shown in Fig. 3 (b), along with the different corresponding electric current added values in position are also different, the result that we observe by experiment, if think that position signalling is correct when the added value of electric current is higher than the fiducial value of appointment, if the added value of electric current is than specifying fiducial value hour to think the position signalling mistake.
Detect the position signalling that position transducer sends N/R method is arranged by the electric current added value of above-mentioned each phase and reference current value are compared below with reference to Fig. 2 explanation.
At first, detect the position of rotor by position transducer, microcomputer control is applied to pulse signal correspondingly on the switching device of corresponding phase, and through behind the certain hour, microcomputer detects electric current on the corresponding phase switching device again by position transducer.
Then, by microcomputer with above-mentioned detect current value and by experiment the reference current value set of user compare, its comparative result, if above-mentionedly detect the current value ratio reference current value greatly then continue to apply pulse current, can continue to carry out and run well, on the contrary, if the above-mentioned current value ratio reference current value that detects is little then stop the respective switch device is applied pulse.
Then, judge the positive and negative of present direction of rotation, apply suitable pulse mutually, make switched reluctance machines recover to run well at each.
Claims (1)
1. the position signalling of a switched reluctance machines has N/R detection method, it is characterized in that, on the device that constitutes by the power-supply circuit of switched reluctance machines, the microcomputer of controlling the output voltage of this power-supply circuit, drive circuit, be achieved as follows step: the first step detects the position of rotor by position transducer, and second step will the pulse signal relevant with this position be applied on the corresponding switching device in the above-mentioned drive circuit; The 3rd pacing goes out the current value on the respective switch device in the above-mentioned drive circuit behind the certain hour; The 4th step compared the above-mentioned current value that measures and reference current value, if the current value ratio reference current value that measures is big, then entering for the 5th step continues to add pulse execution normal condition and turn round; If the current value ratio reference current value that measures is little, then enter the 6th the step stop to add pulse current, entered for the 7th step then, the 7th the step add suitable pulse signal according to direction of rotation, make motor return to normal operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011363665A CN1242543C (en) | 2001-10-12 | 2001-10-12 | Method for detecting position signal of switch reluctance machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011363665A CN1242543C (en) | 2001-10-12 | 2001-10-12 | Method for detecting position signal of switch reluctance machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1412937A CN1412937A (en) | 2003-04-23 |
| CN1242543C true CN1242543C (en) | 2006-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011363665A Expired - Fee Related CN1242543C (en) | 2001-10-12 | 2001-10-12 | Method for detecting position signal of switch reluctance machine |
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| CN (1) | CN1242543C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0526277D0 (en) * | 2005-12-23 | 2006-02-01 | Trw Ltd | Power steering systems |
| CN103439655B (en) * | 2013-06-19 | 2016-05-25 | 南京航空航天大学 | The method for diagnosing faults with fault-tolerant control of switched reluctance machines position sensor |
| CN104218855B (en) * | 2014-09-22 | 2016-08-17 | 山东科汇电力自动化股份有限公司 | The self-adaptation control method of position-less sensor of switched reluctance motor and system |
| CN105627959B (en) * | 2016-02-23 | 2018-03-20 | 东南大学 | A kind of calibration system of switched reluctance machines position signalling sensor |
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2001
- 2001-10-12 CN CNB011363665A patent/CN1242543C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1412937A (en) | 2003-04-23 |
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Granted publication date: 20060215 Termination date: 20091112 |