CN104579099A - Four-phase electrical-excitation double-salient-pole motor and open-circuit fault diagnosis method thereof - Google Patents
Four-phase electrical-excitation double-salient-pole motor and open-circuit fault diagnosis method thereof Download PDFInfo
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Abstract
The invention provides a four-phase electrical-excitation double-salient-pole motor and an open-circuit fault diagnosis method of the four-phase electrical-excitation double-salient-pole motor. According to the method, the middle points of two channels are provided with detection resistors, detection voltage of the resistor is sampled, fault features are extracted, and the fault types are diagnosed. If the voltage of the detection resistor is always a negative value when the electrical angle is larger than 0 degree and smaller than or equal to 180 degrees, and the voltage of the detection resistor is always a positive value when the electrical angle is larger than 180 degrees and smaller than or equal to 360 degrees, the A-phase open-circuit fault can be judged; if the voltage of the detection resistor is always a negative value when the electrical angle is larger than 0 degree and smaller than or equal to 180 degrees, and the voltage of the detection resistor is not always a positive value when the electrical angle is larger than 180 degrees and smaller than or equal to 360 degrees, and the open-circuit fault of a pipe (Q1) on the A phase is judged; the rest can be done in the same manner. The fault diagnosis method is simple in control process and free of complex operation, and the positions of the single-pipe open-circuit fault and the single-phase open-circuit fault can be diagnosed by sampling one voltage signal. The method can be further applied and popularized to four-phase brushless direct-current motors.
Description
Technical field
The present invention relates to a kind of four phase electric excitation biconvex electrode electric machines and open fault diagnostic method thereof, belong to For Diagnosing Faults of Electrical technical field.
Background technology
Double salient-pole electric machine is a kind of new-type motor be made up of the motor body of position transducer, electronic power converter, permanent magnetism or electromagnetism Energizing unit, controller and salient pole stator and rotor sructure.As a kind of novel variable reluctance motor, its magnetic resistance maximum and minimum value ratio greatly, have better energy converting between mechanical characteristic, have good application prospect in all trades and professions.Four phase electric excitation biconvex electrode electric machines have four phase windings, and after generation single-phase fault, all the other each phases still can work, and are therefore very suitable as fault-tolerant motor, apply in high reliability application scenario.
Accurately also diagnostic techniques is the prerequisite that fault-tolerant motor realizes fault tolerance timely." Proceedings of the CSEE " 2009 the 33rd phase paper " inline diagnosis of double salient-pole electric machine full-bridge converter single tube open fault " proposes a kind of method that variation characteristic utilizing neutral point voltage before and after fault carries out failure diagnosis, and has carried out experimental verification.But the method only can be used for the diagnosis research of the single tube open fault of three phase electric machine.Scholar is also had both at home and abroad to propose to adopt and carry out Characteristic Extraction based on the fuzzy control of model and genetic algorithm for normal under particular motor drive system and failure operation state, realize For Diagnosing Faults of Electrical, the method realizes relative difficulty and complexity, and is difficult to realize fault real-time diagnosis.
Summary of the invention
Technical problem to be solved:
A kind of four phase electric excitation biconvex electrode electric machines disclosed by the invention and open fault diagnostic method thereof, only the voltage of the fault detect resistance arranged sampled and extracted fault signature, being applicable to single-phase open circuit and the diagnosis of single tube open fault of four phase four phase electric excitation biconvex electrode electric machines.
Technical scheme:
In order to realize above function, the invention provides a kind of four phase electric excitation biconvex electrode electric machines, it is characterized in that: this motor comprises A phase winding, B phase winding, C phase winding, D phase winding, four phase full-bridge converters and detects resistance (R); Four phase windings of motor are divided into two passages according to the difference of phase place, and the mid point of two passages is connected with and detects resistance (R); Described motor is also provided with controller, and described controller is sampled and extracts fault signature the voltage detecting resistance, to diagnose out the fault type of generation;
Four phase windings of described motor are divided into two passages according to the difference of phase place, specifically refer to A phase winding and are connected on pipe Q1 and A in A phase after C phase winding differential concatenation respectively and descend the mid point of pipe Q2 to descend the mid point of pipe Q6 mutually with pipe Q5 and C in C phase mutually, form a passage; B phase winding be connected on pipe Q3 and B in B phase after D phase winding differential concatenation respectively and descend the mid point of pipe Q4 to descend the mid point of pipe Q8 mutually with pipe Q7 and D in D phase mutually, form another passage.
A kind of four phase electric excitation biconvex electrode electric machine open fault diagnostic methods, is characterized in that: these diagnostic method concrete steps are as follows: for the above-mentioned four phase electric excitation biconvex electrode electric machines of power, these diagnostic method concrete steps are as follows:
If the mutual inductance of A phase winding and the excitation winding electrical degree started when rising is 0 °, electrical degree be (0 °, 180 °] time, pass to positive current to D phase, pass to negative current to B phase;
Electrical degree be (180 °, 360 °] in scope, pass to positive current to B phase, pass to negative current to D phase;
Electrical degree be (90 °, 270 °] in scope, pass to positive current to A phase, pass to negative current to C phase;
Electrical degree be (0 °, 90 °] and (270 °, 360 °] in scope, pass to positive current to C phase, pass to negative current to A phase;
On the basis of above-mentioned energising logic, the voltage detecting resistance is sampled and extracted fault signature, to diagnose out the fault type of generation.
Further, the voltage detecting resistance being sampled and is extracted fault signature, specifically referring to diagnose out the fault type of generation: this diagnostic method adopts following decision logic when judging single-phase open fault:
If electrical degree be (0 °, 180 °] time detects the voltage of resistance and is always negative value, and (180 °, 360 °] time detect resistance voltage be always on the occasion of, then there occurs A phase open fault;
If (0 °, 180 °] time detect the voltage of resistance be always on the occasion of, and (180 °, 360 °] time detect resistance voltage be always negative value, then there occurs C phase open fault;
If (90 °, 270 °] time detects the voltage of resistance and is always negative value, and (0 °, 90 °] ∪ (270 °, 360 °] time detect resistance voltage be always on the occasion of, then there occurs B phase open fault;
If (90 °, 270 °] time detect the voltage of resistance be always on the occasion of, and (0 °, 90 °] ∪ (270 °, 360 °] time detect resistance voltage be always negative value, then there occurs D phase open fault.
Further, the voltage detecting resistance being sampled and is extracted fault signature, specifically referring to diagnose out the fault type of generation: this diagnostic method adopts following decision logic when judging single tube open fault:
If (0 °, 180 °] time detects the voltage of resistance and is always negative value, and (180 °, 360 °] time detect resistance voltage be not always on the occasion of, then there occurs pipe (Q1) open fault A phase in;
If (0 °, 180 °] time detect resistance voltage begin be not eventually negative value, and (180 °, 360 °] time detect resistance voltage be always on the occasion of, then there occurs pipe (Q2) open fault under A phase;
If at (90 °, 270 °] time detects the voltage of resistance and is always negative value, and (0 °, 90 °] ∪ (270 °, 360 °] time detect resistance voltage begin be not eventually on the occasion of, then there occurs pipe (Q3) open fault in B phase;
If at (90 °, 270 °] time detects the voltage of resistance and is not always negative value, and (0 °, 90 °] ∪ (270 °, 360 °] time detect the voltage of resistance be always on the occasion of, then there occurs pipe (Q4) open fault B phase under;
If (0 °, 180 °] time detect the voltage of resistance be always on the occasion of, and (180 °, 360 °] time detect resistance voltage be not always negative value, then there occurs pipe (Q5) open fault C phase in;
If (0 °, 180 °] time detect resistance voltage begin be not eventually on the occasion of, and (180 °, 360 °] time detect resistance voltage be always negative value, then there occurs pipe (Q6) open fault under C phase;
If at (90 °, 270 °] time detect the voltage of resistance be not always on the occasion of, and (0 °, 90 °] ∪ (270 °, 360 °] time detects the voltage of resistance and is always negative value, then there occurs pipe (Q7) open fault D phase in;
If at (90 °, 270 °] time detect the voltage of resistance be always on the occasion of, and (0 °, 90 °] ∪ (270 °, 360 °] time detects the voltage of resistance and is not always negative value, then there occurs pipe (Q8) open fault D phase under.
Beneficial effect:
The fault-tolerant electricity-generating control method of electric excitation biconvex electrode electric machine excitation fault disclosed by the invention, only samples to the voltage of the fault detect resistance arranged and extracts fault signature, both can diagnose out single tube open fault, can diagnose out again single-phase open fault; Controller algorithm is simple, does not need complex calculations.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1 is the present invention four phase electric excitation biconvex electrode electric machine open fault diagnostic method schematic diagram;
Fig. 2 is four phase electric excitation biconvex electrode electric machine standard angle control map of current;
Fig. 3 is the detection resistance voltage figure under the present invention four phase electric excitation biconvex electrode electric machine normal condition;
Fig. 4 is that the present invention four phase electric excitation biconvex electrode electric machine A phase detects resistance voltage figure when opening a way;
Fig. 5 is that the present invention four phase electric excitation biconvex electrode electric machine B phase detects resistance voltage figure when opening a way;
Fig. 6 is that the present invention four phase electric excitation biconvex electrode electric machine C phase detects resistance voltage figure when opening a way;
Fig. 7 detects resistance voltage figure when pipe Q1 opens a way in the present invention four phase electric excitation biconvex electrode electric machine A phase;
Fig. 8 detects resistance voltage figure when pipe Q2 opens a way under the present invention four phase electric excitation biconvex electrode electric machine A phase;
Fig. 9 detects resistance voltage figure when pipe Q8 opens a way under the present invention four phase electric excitation biconvex electrode electric machine D phase.
Embodiment
The invention provides a kind of four phase electric excitation biconvex electrode electric machines and open fault diagnostic method thereof, for making object of the present invention, clearly, clearly, and the present invention is described in more detail with reference to accompanying drawing examples for technical scheme and effect.Should be appreciated that concrete enforcement described herein is only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 is the present invention four phase electric excitation biconvex electrode electric machine open fault diagnostic method schematic diagram.This motor comprises A phase winding, B phase winding, C phase winding, D phase winding, four phase full-bridge converters and detects resistance R.Described four phase full-bridge converters to comprise in pipe Q1 in A phase, lower pipe Q2, B phase in pipe Q3, lower pipe Q4, C phase pipe Q7, lower pipe Q8 in pipe Q5, lower pipe Q6, D phase, and each switching tube is reverse parallel connection diode respectively.
Wherein A phase winding be connected on pipe Q1 and A in A phase after C phase winding differential concatenation respectively and descend the mid point of pipe Q2 to descend the mid point of pipe Q6 mutually with pipe Q5 and C in C phase mutually, form a passage; B phase winding be connected on pipe Q3 and B in B phase after D phase winding differential concatenation respectively and descend the mid point of pipe Q4 to descend the mid point of pipe Q8 mutually with pipe Q7 and D in D phase mutually, form another passage.Detect resistance R and be connected on the mid point of A phase winding and C phase winding and the mid point of B phase winding and D phase winding respectively.Controller is sampled and extracts fault signature the voltage detecting resistance, to diagnose out the fault type of generation.
Fig. 2 is four phase electric excitation biconvex electrode electric machine standard angle control map of current.Suppose that the mutual inductance of A phase winding and the excitation winding electrical degree started when rising is 0.Electrical degree be (0 °, 180 °] in scope, pass to positive current to D phase, pass to negative current to B phase; Electrical degree be (180 °, 360 °] in scope, pass to positive current to B phase, pass to negative current to D phase; Electrical degree be (90 °, 270 °] in scope, pass to positive current to A phase, pass to negative current to C phase; Electrical degree be (0 °, 90 °] and (270 °, 360 °] in scope, pass to positive current to C phase, pass to negative current to A phase.
The general principle of its fault detect is:
The electric operation principle of electric excitation biconvex electrode electric machine is: when certain phase stator poles engages with rotor pole, the mutual inductance of this phase phase winding and excitation winding starts to rise, and passes to forward current mutually now to this; When certain phase stator poles and rotor pole depart from, pass to negative current mutually to this, motor can external Driving Torque.
If A phase is opened a way, then (180 °, 360 °] time to detect ohmically voltage be that upper height bends down, its voltage be on the occasion of; (0 °, 180 °] time to detect the voltage of resistance be upper low height, its voltage is negative value.In like manner, if C phase is opened a way, then (0 °, 180 °] time detect ohmically voltage on the occasion of, other moment voltage is negative value.If D phase is opened a way, then (90 °, 270 °] time detect ohmically voltage on the occasion of, other moment voltage is negative value.If B phase is opened a way, then (90 °, 270 °] time to detect ohmically voltage be negative value, other moment voltage be on the occasion of.
If there is single tube open circuit, for Q1 tube open circuit, be then equivalent to (0 °, 180 °] time A phase open a way, now detecting ohmically voltage is negative value, and the voltage that other stages detect resistance is identical with normal condition.If there is Q2 tube open circuit, then (180 °, 360 °] time detect ohmically voltage on the occasion of, other stages are identical with normal condition.Can find out, during different switching tube generation open fault, its fault signature neither with.Therefore, detect ohmically voltage signal by extracting, can diagnose out is which switching tube there occurs fault.
Detection resistance voltage figure under Fig. 3 tetra-phase electric excitation biconvex electrode electric machine normal condition; Can find out that this voltage is just not being always or is being always negative.
Resistance voltage is detected when Fig. 4: A phase is opened a way.Can find out this voltage electrical degree be (0 °, 180 °] time detects the voltage of resistance and is always negative value, and (180 °, 360 °] time detect resistance voltage be always on the occasion of, therefore can judge to there occurs A phase open fault.
Resistance voltage is detected when Fig. 5: B phase is opened a way.Can find out that this voltage is at (90 °, 270 °] time detects the voltage of resistance and is always negative value, and (0 °, 90 °] ∪ (270 °, 360 °] time detect the voltage of resistance be always on the occasion of, therefore can judge to there occurs B phase open fault.
Resistance voltage is detected when Fig. 6: C phase is opened a way.Can find out this voltage (0 °, 180 °] time detect the voltage of resistance be always on the occasion of, and (180 °, 360 °] time detect resistance voltage be always negative value, therefore can judge to there occurs C phase open fault.
Resistance voltage is detected when pipe Q1 opens a way in Fig. 7: A phase.Can find out that this voltage is at (0 °, 180 °] time detects the voltage of resistance and is always negative value, and (180 °, 360 °] time detect the voltage of resistance be not always on the occasion of, therefore can judge there occurs pipe (Q1) open fault A phase in.
Fig. 8: A phase lower pipe Q2 detects resistance voltage when opening a way.Can find out that this voltage is at (0 °, 180 °] time detect resistance voltage begin to be not eventually negative value, and (180 °, 360 °] time detect the voltage of resistance be always on the occasion of, therefore can judge there occurs pipe (Q2) open fault A phase under.
Fig. 9: D phase lower pipe Q8 detects resistance voltage when opening a way.Can find out that this voltage is at (90 °, 270 °] time detect the voltage of resistance be always on the occasion of, and at (0 °, 90 °] ∪ (270 °, 360 °] time detects the voltage of resistance and is not always negative value, therefore can judge there occurs pipe (Q8) open fault D phase under.
Concrete each open fault mark sheet is as shown in table 1.
The fault signature table of table 1 open fault
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the present invention.
Claims (4)
1. four phase electric excitation biconvex electrode electric machines, is characterized in that: this motor comprises A phase winding, B phase winding, C phase winding, D phase winding, four phase full-bridge converters and detects resistance (R); Four phase windings of motor are divided into two passages according to the difference of phase place, and the mid point of two passages is connected with and detects resistance (R); Described motor is also provided with controller, and described controller is sampled and extracts fault signature the voltage detecting resistance, to diagnose out the fault type of generation;
Four phase windings of described motor are divided into two passages according to the difference of phase place, specifically refer to A phase winding and are connected on pipe Q1 and A in A phase after C phase winding differential concatenation respectively and descend the mid point of pipe Q2 to descend the mid point of pipe Q6 mutually with pipe Q5 and C in C phase mutually, form a passage; B phase winding be connected on pipe Q3 and B in B phase after D phase winding differential concatenation respectively and descend the mid point of pipe Q4 to descend the mid point of pipe Q8 mutually with pipe Q7 and D in D phase mutually, form another passage.
2. four phase electric excitation biconvex electrode electric machine open fault diagnostic methods, is characterized in that: these diagnostic method concrete steps are as follows: for four phase electric excitation biconvex electrode electric machines according to claim 1,
If the mutual inductance of A phase winding and the excitation winding electrical degree started when rising is 0 °, electrical degree be (0 °, 180 °] time, pass to positive current to D phase, pass to negative current to B phase;
Electrical degree be (180 °, 360 °] in scope, pass to positive current to B phase, pass to negative current to D phase;
Electrical degree be (90 °, 270 °] in scope, pass to positive current to A phase, pass to negative current to C phase;
Electrical degree be (0 °, 90 °] and (270 °, 360 °] in scope, pass to positive current to C phase, pass to negative current to A phase;
On the basis of above-mentioned energising logic, the voltage detecting resistance is sampled and extracted fault signature, to diagnose out the fault type of generation.
3. a kind of four phase electric excitation biconvex electrode electric machine open fault diagnostic methods according to claim 2, it is characterized in that: the voltage detecting resistance being sampled and extracted fault signature, specifically referring to diagnose out the fault type of generation: this diagnostic method adopts following decision logic when judging single-phase open fault:
If electrical degree be (0 °, 180 °] time detects the voltage of resistance and is always negative value, and (180 °, 360 °] time detect resistance voltage be always on the occasion of, then there occurs A phase open fault;
If (0 °, 180 °] time detect the voltage of resistance be always on the occasion of, and (180 °, 360 °] time detect resistance voltage be always negative value, then there occurs C phase open fault;
If (90 °, 270 °] time detects the voltage of resistance and is always negative value, and (0 °, 90 °] ∪ (270 °, 360 °] time detect resistance voltage be always on the occasion of, then there occurs B phase open fault;
If (90 °, 270 °] time detect the voltage of resistance be always on the occasion of, and (0 °, 90 °] ∪ (270 °, 360 °] time detect resistance voltage be always negative value, then there occurs D phase open fault.
4. a kind of four phase electric excitation biconvex electrode electric machine open fault diagnostic methods according to claim 2, it is characterized in that: the voltage detecting resistance being sampled and extracted fault signature, specifically referring to diagnose out the fault type of generation: this diagnostic method adopts following decision logic when judging single tube open fault:
If (0 °, 180 °] time detects the voltage of resistance and is always negative value, and (180 °, 360 °] time detect resistance voltage be not always on the occasion of, then there occurs pipe (Q1) open fault A phase in;
If (0 °, 180 °] time detect resistance voltage begin be not eventually negative value, and (180 °, 360 °] time detect resistance voltage be always on the occasion of, then there occurs pipe (Q2) open fault under A phase;
If (90 °, 270 °] time detects the voltage of resistance and is always negative value, and (0 °, 90 °] ∪ (270 °, 360 °] time detect resistance voltage begin be eventually not on the occasion of, then there occurs pipe (Q3) open fault in B phase;
If (90 °, 270 °] time detects the voltage of resistance and is not always negative value, and (0 °, 90 °] ∪ (270 °, 360 °] time detect resistance voltage be always on the occasion of, then there occurs pipe (Q4) open fault B phase under;
If (0 °, 180 °] time detect the voltage of resistance be always on the occasion of, and (180 °, 360 °] time detect resistance voltage be not always negative value, then there occurs pipe (Q5) open fault C phase in;
If (0 °, 180 °] time detect resistance voltage begin be not eventually on the occasion of, and (180 °, 360 °] time detect resistance voltage be always negative value, then there occurs pipe (Q6) open fault under C phase;
If (90 °, 270 °] time detect the voltage of resistance be not always on the occasion of, and (0 °, 90 °] ∪ (270 °, 360 °] time detect resistance voltage be always negative value, then there occurs pipe (Q7) open fault D phase in;
If (90 °, 270 °] time detect the voltage of resistance be always on the occasion of, and (0 °, 90 °] ∪ (270 °, 360 °] time detect resistance voltage be not always negative value, then there occurs pipe (Q8) open fault D phase under.
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| CN113740772A (en) * | 2021-09-07 | 2021-12-03 | 南京航空航天大学 | Double salient pole motor driving system open-circuit fault diagnosis method |
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| CN101078747A (en) * | 2007-06-29 | 2007-11-28 | 南京航空航天大学 | Double salient-pole motor drive power tube fault diagnosis method |
| CN103825505A (en) * | 2014-02-21 | 2014-05-28 | 太仓航创自动化科技有限公司 | Topology reconstruction method of brushless direct-current motor fault-tolerant inverter |
| CN103812319B (en) * | 2014-02-25 | 2016-08-17 | 南京航空航天大学 | A kind of four phase brushless DC motor error tolerant power converter and control methods |
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| CN107147339A (en) * | 2017-05-22 | 2017-09-08 | 南京航空航天大学 | A kind of four phase electric excitation biconvex electrode electric machine loss of excitation failure tolerant electricity-generating methods |
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