CN106569076B - Asynchronous machine three-phase phase-sequence misconnection detection system and method - Google Patents
Asynchronous machine three-phase phase-sequence misconnection detection system and method Download PDFInfo
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- CN106569076B CN106569076B CN201510663336.0A CN201510663336A CN106569076B CN 106569076 B CN106569076 B CN 106569076B CN 201510663336 A CN201510663336 A CN 201510663336A CN 106569076 B CN106569076 B CN 106569076B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
Description
Technical field
The present invention relates to Motor Control Field, in particular to a kind of asynchronous machine three-phase phase-sequence misconnection detection system and side Method.
Background technique
With the popularization of new energy technology, asynchronous machine is widely used in the fields such as walking machine, fork truck, automobile, In production assembly and use process, there are strict requirements for the wiring of threephase cable, three-phase phase-sequence misconnection occurs, will directly affect product Normal operation.If the asynchronous machine is V/F scheme control, may occur rotating and reverse top due to three-phase phase-sequence misconnection The phenomenon that, influences to use safely.If the asynchronous machine is vector controlled, electricity may occur due to three-phase phase-sequence misconnection Stream, motor vibrating phenomenon keep its fever serious, or even can not normal rotation.
In the prior art, can by increase additional hardware with detect asynchronous machine three-phase phase-sequence whether misconnection, but In actual product, it is contemplated that cost problem does not increase additional hardware all on all asynchronous machines to detect its three-phase phase-sequence Whether misconnection, but prevent wrong by being strict with wiring standard, this is not avoided that due to human negligence and causes to connect Wrong phenomenon, once wrong, then need the operation conditions of artificial observation motor, judge three-phase phase-sequence whether misconnection, and in misconnection Shi Genggai wiring solves the problems, such as.But this method only leans on subjective judgement, needs the experience of personnel very rich, could solve in time Otherwise certainly problem will cause motor to damage, even personnel hazard.How to reduce detection asynchronous machine three-phase phase-sequence whether misconnection Cost, be a technical problem to be solved urgently.
Summary of the invention
In view of this, the present invention proposes a kind of asynchronous machine three-phase misconnection detection system and method, it is asynchronous to reduce detection Motor three-phase phase-sequence whether the cost of misconnection.
On the one hand, the present invention provides a kind of asynchronous machine three-phase phase-sequence misconnection detection systems, including pumping signal to provide Device, current signal sampling apparatus and control device；
The pumping signal provides device, connect with the asynchronous machine, for for the asynchronous machine provide frequency with The pumping signal of amplitude stability；
The current signal sampling apparatus, connect with the current feedback terminal of the asynchronous machine and the control device, uses In three-phase current signal of the acquisition asynchronous machine under the pumping signal, and the three-phase current signal is transmitted to institute State control device；
The control device, comprising:
Receiving module is connect, for receiving the three-phase current signal with the current signal sampling apparatus；
First conversion module is connect with the receiving module, for carrying out vector to the three-phase current signal, is obtained To vector result；
Second conversion module is connect with first conversion module, for carrying out rotation change to the vector result It changes, obtains rotation transformation result；
Judgment module is connect with second conversion module, is used for according to the rotation transformation as a result, judging described asynchronous The three-phase phase-sequence of motor whether misconnection.
Further, the judgment module, comprising:
First judging unit, judgment formula
It is whether true, if so, then determine that the three-phase phase-sequence of the asynchronous machine does not have misconnection；If not, then determine The misconnection of the three-phase phase-sequence of the asynchronous machine；
Wherein,For the rotation transformation as a result, I is the peak value of the three-phase current signal.
Further, the judgment module further includes second judgment unit, for missing in the asynchronous machine three-phase phase-sequence In the case where connecing, according to the misconnection type of asynchronous machine described in the rotation transformation result judgement.
Further, the second judgment unit is specifically used for judgment formula
It is whether true, if so, then determine that the misconnection type is, the A phase and the b phase of motor that the pumping signal generates The B phase that misconnection, the pumping signal generate and the misconnection of c phase, the C phase of pumping signal generation and a phase of motor of motor are missed It connects；
If not, then judgment formula
It is whether true, if so, then determine the misconnection type are as follows: the A phase and the c phase of motor that the pumping signal generates The B phase that misconnection, the pumping signal generate and the misconnection of a phase, the C phase of pumping signal generation and the b phase of motor of motor are missed It connects；
If not, then judgment formula
It is whether true, if so, then determine the misconnection type are as follows: the A phase and the b phase of motor that the pumping signal generates The c phase of a phase misconnection of B phase and motor that misconnection, the pumping signal generate, the C phase that the pumping signal generates and motor is just Really connection；
If not, then judgment formula
It is whether true, if so, then determine the misconnection type are as follows: the A phase and the c phase of motor that the pumping signal generates The correct connection of the b phase of misconnection, the B phase that the pumping signal generates and motor, the C phase of pumping signal generation and a of motor Phase misconnection；
If not, then judgment formula
It is whether true, if so, then determine the misconnection type are as follows: the A phase and a phase of motor that the pumping signal generates The B phase that correct connection, the pumping signal generate and the c phase misconnection of motor, the b of the C phase that the pumping signal generates and motor Phase misconnection；
Wherein,For the rotation transformation as a result, I is the peak value of the three-phase current signal, w=2 π f.
Further, the frequency of the pumping signal is less than the 50% of the rated frequency of the asynchronous machine, the excitation The amplitude of signal makes the three-phase current signal within the scope of the 5%-15% of the rated current of the asynchronous machine.
On the other hand, the present invention also provides a kind of asynchronous machine three-phase phase-sequence misconnection detection methods, comprising steps of
The pumping signal of frequency and amplitude stability is provided for the asynchronous machine；
Acquire three-phase current signal of the asynchronous machine under the pumping signal；
Vector is carried out to the three-phase current signal, obtains vector result；
Rotation transformation is carried out to the vector result, obtains rotation transformation result；
According to the rotation transformation as a result, judge the asynchronous machine three-phase phase-sequence whether misconnection.
Further, it is described according to the rotation transformation as a result, judge the asynchronous machine three-phase phase-sequence whether misconnection The step of, specifically: judgment formula
It is whether true, if so, then determine that the three-phase phase-sequence of the asynchronous machine does not have misconnection；If not, then determine The misconnection of the three-phase phase-sequence of the asynchronous machine；
Wherein,For the rotation transformation as a result, I is the peak value of the three-phase current signal.
Further, it further comprises the steps of: in the case where the asynchronous machine three-phase phase-sequence misconnection, is become according to the rotation Change the misconnection type of asynchronous machine described in result judgement.
Further, in the case where the asynchronous machine three-phase phase-sequence misconnection, according to the rotation transformation result judgement The step of misconnection type of the asynchronous machine, specifically:
Judgment formula
It is whether true, if so, then determine that the misconnection type is, the A phase and the b phase of motor that the pumping signal generates The B phase that misconnection, the pumping signal generate and the misconnection of c phase, the C phase of pumping signal generation and a phase of motor of motor are missed It connects；
If not, then judgment formula
It is whether true, if so, then determine the misconnection type are as follows: the A phase and the c phase of motor that the pumping signal generates The B phase that misconnection, the pumping signal generate and the misconnection of a phase, the C phase of pumping signal generation and the b phase of motor of motor are missed It connects；
If not, then judgment formula
It is whether true, if so, then determine the misconnection type are as follows: the A phase and the b phase of motor that the pumping signal generates The c phase of a phase misconnection of B phase and motor that misconnection, the pumping signal generate, the C phase that the pumping signal generates and motor is just Really connection；
If not, then judgment formula
It is whether true, if so, then determine the misconnection type are as follows: the A phase and the c phase of motor that the pumping signal generates The correct connection of the b phase of misconnection, the B phase that the pumping signal generates and motor, the C phase of pumping signal generation and a of motor Phase misconnection；
If not, then judgment formula
It is whether true, if so, then determine the misconnection type are as follows: the A phase and a phase of motor that the pumping signal generates The B phase that correct connection, the pumping signal generate and the c phase misconnection of motor, the b of the C phase that the pumping signal generates and motor Phase misconnection；
The sequence of the judgment formula step can be exchanged arbitrarily；
Wherein,For the rotation transformation as a result, I is the peak value of the three-phase current signal, w=2 π f.
Further, the frequency of the pumping signal is less than the 50% of the rated frequency of the asynchronous machine, the excitation The amplitude of signal makes the three-phase current signal within the scope of the 5%-15% of the rated current of the asynchronous machine.
Asynchronous machine three-phase phase-sequence misconnection detection system and method provided by the invention, by being provided in advance to asynchronous machine The pumping signal of one frequency and amplitude stability is equivalent to test signal, and samples the feedback current under the test signal, then right The feedback current carries out vector and rotation transformation, and judges whether the three-phase phase-sequence of asynchronous machine misses according to transformation results It connects, is avoided that asynchronous machine misconnection at work, is directly burnt, or even cause safety accident, the detection system structure is simple It is convenient, it is low in cost.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of Vector Control System for Asynchronous Machine in the prior art；
Fig. 2 is the structure chart of one embodiment of asynchronous machine three-phase phase-sequence misconnection detection system of the present invention；
Fig. 3 is the structure chart of judgment module one embodiment of asynchronous machine three-phase phase-sequence misconnection detection system of the present invention；
Fig. 4-Fig. 9 is the schematic diagram of the asynchronous machine three-phase mode of connection；
Figure 10 is the flow chart of one embodiment of asynchronous machine three-phase phase-sequence misconnection detection method of the present invention；
Figure 11 is the flow chart of another embodiment of asynchronous machine three-phase phase-sequence misconnection detection method of the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, it is shown that a motor vector control system in the prior art.Within the system, input voltage It is converted by 2R/2S, using the turn-on and turn-off time of IGBT in SVPWM impulse generator control inverter, by three-phase electricity Pressure is loaded onto asynchronous machine.Below by taking the motor vector control system as an example, asynchronous machine three-phase phase-sequence of the present invention is described in detail and is missed Detection system is connect, the example of the specific motor vector control system does not limit application range of the invention, of the invention Asynchronous machine three-phase phase-sequence misconnection detection system, can be applied in any type of electric machine control system.
As shown in Figure 2, it is shown that one embodiment of the invention, a kind of asynchronous machine three-phase phase-sequence misconnection detection system, packet It includes pumping signal and device 100, current signal sampling apparatus 200 and control device 300 is provided.
Pumping signal provides device 100, connect with the Input voltage terminal of the exemplary Vector Control System for Asynchronous Machine of Fig. 1, For providing for asynchronous machine, frequency is f and amplitude is ud、uqStabilization pumping signal.And by current signal sampling apparatus 200, It connect with its current feedback terminal, is fed back for acquiring asynchronous machine in the case where pumping signal provides the pumping signal that device 100 provides Three-phase current signal.The current signal collection device 200, also connect with control device 300, the three-phase current for will acquire Signal is transmitted to control device 300.
Control device 300, comprising: receiving module 310 is connect, for receiving three-phase electricity with current signal sampling apparatus 200 Flow signal；First conversion module 320, connect with receiving module 310, receives the three-phase current signal of sampling, and to the three-phase electricity It flows signal and carries out vector, obtain vector result；Second conversion module 330 connect with the first conversion module 320, connects Receive the vector of the first conversion module 320 as a result, and to the vector result carry out rotation transformation, obtain rotation transformation knot Fruit；Judgment module 340 is connect with the second conversion module 330, receives the rotation transformation as a result, and according to rotation transformation as a result, sentencing The three-phase phase-sequence of disconnected asynchronous machine whether misconnection.
In this embodiment, device 100 is provided by pumping signal provide a frequency and amplitude to asynchronous machine in advance Stable pumping signal is equivalent to test signal, and samples the feedback under the test signal by current signal sampling apparatus 200 Electric current input control device 300, the control device 300 carry out vector and rotation transformation to the feedback current, and according to change Change result judge asynchronous machine three-phase phase-sequence whether misconnection, avoid asynchronous machine misconnection at work, be directly burnt, even Safety accident is caused, the detection system structure is simple and convenient, low in cost.
Preferably, judgment module 340, comprising:
First judging unit 341, judgment formula
It is whether true, if so, then determine that the three-phase phase-sequence of asynchronous machine does not have misconnection.If not, then determine asynchronous The misconnection of the three-phase phase-sequence of motor.
Wherein,For rotation transformation as a result, I is the peak value of three-phase current signal.
In this embodiment, the specific structure of judgment module 340 is given, its three-phase phase for judging asynchronous machine is detailed Sequence whether the concrete form of misconnection.In the following, to the judgment module 340 judge asynchronous machine three-phase phase-sequence whether misconnection it is specific The validity of form is verified.
It is assumed that asynchronous machine is provided in pumping signal, the frequency that device 100 provides is f and amplitude is ud、uqStablize excitation Under signal driving, the three-phase current signal of the sampling of current signal sampling apparatus 200 are as follows:
Ia=Icos (wt)
Wherein, peak value of the I for three-phase current signal, w=2 π f,For three-phase current signal.
Then, if A, B, C three-phase of IGBT and a, b, c three-phase of motor do not have wrong, as shown in figure 4, being become according to vector Change formula it is found that the three-phase current signal vector result are as follows:
In turn, according to rotation transformation formula it is found that rotation transformation result are as follows:
By by three-phase current signalWith vector resultRotation transformation is substituted into as a result, can obtain:
So as shown in figure 4, if A, B, C three-phase of IGBT and a, b, c three-phase of motor do not have wrong, formula
It should set up, if not, it then can determine that the three-phase phase-sequence misconnection of asynchronous machine.
More preferably, as shown in figure 3, judgment module 340, further includes second judgment unit 342, in asynchronous machine In the case where three-phase phase-sequence misconnection, according to the misconnection type of rotation transformation result judgement asynchronous machine.
In this embodiment, judgment module 340 further include second judgment unit 342, can be missed in asynchronous machine three-phase phase-sequence In the case where connecing, according to the misconnection type of rotation transformation result judgement asynchronous machine, operator is informed, operator can basis Which phase sequence wrong is the misconnection type of asynchronous machine quickly determine, change the wiring between those phases IGBT and motor, in time rapidly Solve the problems, such as phase sequence misconnection, without exploration three-phase without any idea wiring where wrong.
In more detail, second judgment unit 342 are specifically used for judgment formula
It is whether true, if so, then determine that misconnection type is, A phase that pumping signal as shown in Figure 5 generates and motor The B phase that the misconnection of b phase, pumping signal generate and the c phase misconnection of motor, a phase misconnection of the C phase that pumping signal generates and motor.
If not, then judgment formula
It is whether true, if so, then determine misconnection type are as follows: A phase that pumping signal as shown in FIG. 6 generates and motor The B phase that the misconnection of c phase, pumping signal generate and a phase misconnection of motor, the b phase misconnection of the C phase that pumping signal generates and motor.
If not, then judgment formula
It is whether true, if so, then determine misconnection type are as follows: A phase that pumping signal as shown in Figure 7 generates and motor The B phase that the misconnection of b phase, pumping signal generate and the misconnection of a phase, the C phase of pumping signal generation and the c phase of motor of motor correctly connect It connects.
If not, then judgment formula
It is whether true, if so, then determine misconnection type are as follows: A phase that pumping signal as shown in Figure 8 generates and motor The a phase of the correct connection of the b phase of the misconnection of c phase, the B phase that pumping signal generates and motor, the C phase that pumping signal generates and motor is missed It connects.
If not, then judgment formula
It is whether true, if so, then determine misconnection type are as follows: A phase that pumping signal as shown in Figure 9 generates and motor The a phase B phase that correctly connection, pumping signal generate and the misconnection of c phase, the C phase of pumping signal generation and the b phase of motor of motor are missed It connects.
Wherein,For rotation transformation as a result, I is the peak value of three-phase current signal, w=2 π f.
In this embodiment, the concrete form that second judgment unit 342 judges the misconnection type of asynchronous machine is given.Under The validity of the concrete form is verified in face.
If as shown in figure 5, B phase and motor that the A phase that pumping signal generates is generated with the b phase misconnection of motor, pumping signal The misconnection of c phase, pumping signal generate C phase and a phase misconnection of motor, then it is found that the rotation transformation result of three-phase current signal Are as follows:
If as shown in fig. 6, B phase and motor that the A phase that pumping signal generates is generated with the c phase misconnection of motor, pumping signal The misconnection of a phase, pumping signal generate C phase and the b phase misconnection of motor, then it is found that the rotation transformation result of three-phase current signal Are as follows:
If as shown in fig. 7, B phase and motor that the A phase that pumping signal generates is generated with the b phase misconnection of motor, pumping signal The misconnection of a phase, the C phase that pumping signal generates and motor the correct connection of c phase, then it is found that the rotation transformation of three-phase current signal As a result are as follows:
If as shown in figure 8, B phase and motor that the A phase that pumping signal generates is generated with the c phase misconnection of motor, pumping signal B phase correctly connection, pumping signal generate C phase and a phase misconnection of motor, then it is found that the rotation transformation of three-phase current signal As a result are as follows:
If as shown in figure 9, pumping signal generate A phase and motor a phase correctly connection, pumping signal generate B phase and The C phase and the b phase misconnection of motor that the c phase misconnection of motor, pumping signal generate, then it is found that the rotation transformation of three-phase current signal As a result are as follows:
So second judgment unit 342, it can be simply and effectively according to corresponding different rotary under the above-mentioned different modes of connection Transformation results determine the misconnection type of asynchronous machine.
Preferably, the frequency of pumping signal is less than the 50% of the rated frequency of asynchronous machine, and the amplitude of pumping signal makes three Phase current signal is within the scope of the 5%-15% of the rated current of asynchronous machine.
The frequency of pumping signal and amplitude have been made further preferably in this embodiment, both avoidable amplitude was too small, Keep feedback current too small, influences the accuracy of testing result, and avoidable amplitude is too big, malfunctions asynchronous machine, or even burns Damage, causes safety accident.More preferably, the frequency of pumping signal, specially 50Hz.
On the other hand, as shown in Figure 10, the present invention also provides a kind of asynchronous machine three-phase phase-sequence misconnection detection methods, including Step:
S100: the pumping signal of frequency and amplitude stability is provided for asynchronous machine.
S200: three-phase current signal of the acquisition asynchronous machine under pumping signal.
S300: vector is carried out to three-phase current signal, obtains vector result.
S400: rotation transformation is carried out to vector result, obtains rotation transformation result.
S500: according to rotation transformation as a result, judge asynchronous machine three-phase phase-sequence whether misconnection.
Preferably, step S500, according to rotation transformation as a result, judge asynchronous machine three-phase phase-sequence whether the step of misconnection Suddenly, specifically: judgment formula
It is whether true, if so, then determine that the three-phase phase-sequence of asynchronous machine does not have misconnection.If not, then determine asynchronous The misconnection of the three-phase phase-sequence of motor.
Wherein,For rotation transformation as a result, I is the peak value of three-phase current signal.
Preferably, the asynchronous machine three-phase phase-sequence misconnection detection method, further comprises the steps of:
S600: in the case where asynchronous machine three-phase phase-sequence misconnection, according to the mistake of rotation transformation result judgement asynchronous machine Connect type.
Preferably, step S600, it is different according to rotation transformation result judgement in the case where asynchronous machine three-phase phase-sequence misconnection The step of walking the misconnection type of motor, specifically:
Judgment formula
It is whether true, if so, then determine that misconnection type is, the b phase misconnection of A phase and motor that pumping signal generates swashs Encourage the B phase of signal generation and the c phase misconnection of motor, a phase misconnection of the C phase that pumping signal generates and motor.
If not, then judgment formula
It is whether true, if so, then determine misconnection type are as follows: the c phase misconnection of A phase and motor that pumping signal generates swashs Encourage the B phase of signal generation and a phase misconnection of motor, the b phase misconnection of the C phase that pumping signal generates and motor.
If not, then judgment formula
It is whether true, if so, then determine misconnection type are as follows: the b phase misconnection of A phase and motor that pumping signal generates swashs The c phase for encouraging the B phase of signal generation and a phase misconnection of motor, the C phase that pumping signal generates and motor correctly connects.
If not, then judgment formula
It is whether true, if so, then determine misconnection type are as follows: the c phase misconnection of A phase and motor that pumping signal generates swashs The correctly connection, a phase misconnection of the C phase that pumping signal generates and motor of the b phase of the B phase and motor of encouraging signal generation.
If not, then judgment formula
It is whether true, if so, then determine misconnection type are as follows: a phase of A phase and motor that pumping signal generates correctly connects It connects, B phase and the c phase misconnection of motor, the b phase misconnection of the C phase that pumping signal generates and motor that pumping signal generates.
Wherein,For rotation transformation as a result, I is the peak value of three-phase current signal, w=2 π f.
It is noted that the embodiment only provides example, the sequence of the judgment formula step is not defined, it is above-mentioned The sequence of judgment formula step can be exchanged arbitrarily.
Preferably, the frequency of pumping signal is less than the 50% of the rated frequency of asynchronous machine, and the amplitude of pumping signal makes three Phase current signal is within the scope of the 5%-15% of the rated current of asynchronous machine.
The above asynchronous machine three-phase phase-sequence misconnection detection method is corresponding with asynchronous machine three-phase phase-sequence misconnection detection system, Specific embodiment and technical effect, details are not described herein.The foregoing is merely illustrative of the preferred embodiments of the present invention, and does not have to To limit the present invention, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should all be wrapped Containing within protection scope of the present invention.
Claims (8)
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