CN110247591A - A kind of two-step electric excitation biconvex electrode electric machine initial position of rotor estimation method - Google Patents
A kind of two-step electric excitation biconvex electrode electric machine initial position of rotor estimation method Download PDFInfo
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- CN110247591A CN110247591A CN201910530124.3A CN201910530124A CN110247591A CN 110247591 A CN110247591 A CN 110247591A CN 201910530124 A CN201910530124 A CN 201910530124A CN 110247591 A CN110247591 A CN 110247591A
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- phase
- induction
- electric machine
- biconvex electrode
- excitation biconvex
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
- H02P6/185—Circuit arrangements for detecting position without separate position detecting elements using inductance sensing, e.g. pulse excitation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2203/00—Indexing scheme relating to controlling arrangements characterised by the means for detecting the position of the rotor
- H02P2203/01—Motor rotor position determination based on the detected or calculated phase inductance, e.g. for a Switched Reluctance Motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2203/00—Indexing scheme relating to controlling arrangements characterised by the means for detecting the position of the rotor
- H02P2203/03—Determination of the rotor position, e.g. initial rotor position, during standstill or low speed operation
Abstract
The invention discloses a kind of two-step electric excitation biconvex electrode electric machine initial position of rotor estimation methods, include the following steps: S1: the injection detection pulse A+B+C- on the three-phase windings of electric excitation biconvex electrode electric machine, and in the response current i of detection end-of-pulsing instance sample A, B two-phaseaAnd ib, determine response current ia、ibWith winding self-induction La、LbBetween relationship；S2: electric current i according to responsea、ibWith winding self-induction La、LbBetween relationship, re-inject detection pulse, and in the response current of detection end-of-pulsing instance sample B, C two-phase or C, A two-phase, determine minimum phase winding self-induction；S3: by minimum phase winding self-induction, estimating the initial position of electric excitation biconvex electrode electric machine rotor, determines that electric excitation biconvex electrode electric machine position-sensor-free being capable of initial power-up phase of low speed when starting.The present invention searches self-induction minimum by the injection detection pulse of two steps and mutually carries out original position of electric motor's rotator estimation, shortens the rotor position estimate time, improves system initial start performance to a certain extent.
Description
Technical field
The present invention relates to motor control technology field more particularly to a kind of two-step electric excitation biconvex electrode electric machine rotor are initial
Location estimation method.
Background technique
Electric excitation biconvex electrode electric machine is as a kind of new special reluctance motor, with simple and reliable for structure, control is flexible, holds
The advantages that wrong performance is good receives significant attention in aviation, field of wind power generation.Machine in traditional electric excitation biconvex electrode electric machine system
The installation of tool position sensor not only increases volume cost, more seriously reduces system reliability, and therefore, no position passes
Sensor control strategy is worth with important research, at present the domestic and international position Sensorless Control in relation to electric excitation biconvex electrode electric machine
Strategy study is still in its infancy.Back-emf is current research method for controlling position-less sensor the most mature, but low speed
Stage back-emf amplitude is lower to be difficult to apply.In fact, the starting of low speed position-sensor-free is electric machine without position sensor control
The Research Challenges in field, wherein initial position of rotor estimation is the basis that low speed position-sensor-free starts, and existing research is general
The estimation of low speed rotor position is realized by injection detection pulse.
Chinese patent publication No.: date of publication: 102291070 A of CN on December 21st, 2011, discloses a kind of double-salient-pole
Electric machine without position sensor control starting method, this method comprises the following steps: given respectively by inverter every kind of stator around
Group combination apply one it is identical when ask, the pulse voltage of equal magnitude, corresponding electric current is detected at the end of each voltage
Value, the current value accordingly generated are the functions of every kind of combination equivalent inductance, and inductance is closed with asking for rotor-position there are corresponding
System, compares current value and can ask and connect to obtain initial position of rotor；According to conduction inverter respective switch is turned to, make corresponding stator
Stator magnetic potential one determining angular range of advanced initial position that winding current generates guarantees the conjunction that stator winding current generates
It interacts to obtain maximum average electromagnetic torque at magnetic potential and permanent magnetic field, rotates motor towards given steering.The invention is not required to
Position sensor is wanted, without obtaining the parameter of electric machine in advance, and parameter of electric machine variation has no effect on this method realization.But the party
Method needs to inject 6 detection pulses, increases the system start time, injects multiple detection pulses and unavoidably generates negative electricity magnetic
Torque reduces system start performance.
Chinese patent notification number: the day for announcing: 103684137 A of CN on 08 17th, 2016, is disclosed a kind of based on string
The electric excitation biconvex electrode electric machine low speed for joining inductance slope threshold value runs position-sensor-free technology, electric excitation biconvex electrode electric machine two-phase
Armature winding simultaneously turns on, switching tube high frequency chopping when low speed is run, and passes through bus when detection switch pipe turn-on and turn-off respectively
Then current value is calculated into bus chopper current slope value when calculating separately switching tube turn-on and turn-off in digitial controller
It is current that the self-induction slope value that is connected in series is connected, commutation is judged compared with preset motor commutation point series self-inductances slope threshold value
Point.Start commutation when series self-inductances slope value is less than or equal to given threshold.The method overcome can not be straight when low speed operation
Detection back-emf is connect, needs external circuits, series self-inductances the drawbacks such as are not easy to detect in commutation point change in location, obtain a kind of simplicity
Position Sensorless Control strategy easy to accomplish is laid a good foundation for the operation of electric excitation biconvex electrode electric machine low-speed stable.But
This method needs to set commutation inductance threshold values according to the parameter of electric machine, portable not strong.
Chinese patent publication No.: date of publication: 103236807 A of CN on 08 07th, 2013, is disclosed a kind of novel
For initial position of rotor detection technique of the three-phase electric excitation biconvex electrode electric machine in six status triggerings.Due to electric excitation biconvex electrode
The position-sensor-free technology of motor at home and abroad study it is very few, therefore the invention for three-phase electric excitation biconvex electrode electric machine it is exclusive
Armature inductance value be rotor-position function characteristic, propose and a kind of inject the progress of action of low-voltage pulse vector based on being conducted two-by-two
The method that rotor-position is estimated.The method only needs to detect the end voltage of non-conduction phase, is being connected by comparing non-conduction phase terminal voltage
The size of stage and freewheeling period response amplitude can accurately estimate initial position of rotor.This method is without any additional attached
Canadian dollar device, eliminates armature supply sampling mutual inductor, and economical and practical while positioning accuracy can reach 600, guarantee that three-phase electricity is encouraged
Magnetic double salient-pole electric machine can six status triggerings, to increase its starting torque.But this method needs to inject multiple detection pulses, drop
Low system initial start performance, and need additional increase end voltage sensor.
Chinese patent publication No.: date of publication: 104617832 A of CN on May 13rd, 2015, discloses a kind of electrical excitation
Double salient-pole electric machine is powered when motor is static to excitation winding, without reversion starting method by comparing exciting current uphill process
The size of middle three-phase induction voltage Ua, Ub, Uc judge sector where rotor, and according to several in double salient-pole electric machine " inductance rectangle "
What similarity relation accurately calculates to obtain initial position of rotor, then the rotor-position by obtaining injects acceleration pulse, it is ensured that motor without
Reversion starts.Compared with traditional initial position judgment method, this method is not necessarily to the injection detection pulse into armature winding, avoids
Initial position detection process motor occurs shaking and invert, while reducing position judgement required time, additional hard without increasing
Part circuit, is not influenced by the parameter of electric machine, it is easy to accomplish.But the initial position of rotor algorithm for estimating is relatively complicated, and this method
It is only applicable to the rotor position estimate in rest stage.
The rotor position estimate of electric excitation biconvex electrode electric machine low-speed stages many at present is by injecting multiple inspections mostly
Survey what voltage pulse was realized, but the injection of multiple detection pulses increases the system start time, thereby increases and it is possible to generate certain negative electricity magnetic and turn
Square reduces the initial start performance of system.
Summary of the invention
Goal of the invention: being not easy determining problem for the rotor-position of existing electric excitation biconvex electrode electric machine low-speed stage, this
Invention proposes a kind of two-step electric excitation biconvex electrode electric machine initial position of rotor estimation method.
Technical solution: to achieve the purpose of the present invention, the technical scheme adopted by the invention is that:
A kind of two-step electric excitation biconvex electrode electric machine initial position of rotor estimation method, the method specifically include following step
It is rapid:
S1: the injection detection pulse A+B+C- on the three-phase windings of electric excitation biconvex electrode electric machine, and in detection end-of-pulsing
The response current i of instance sample A, B two-phaseaAnd ib, determine the response current ia、ibWith winding self-induction La、LbBetween relationship；
S2: according to the response current ia、ibWith winding self-induction La、LbBetween relationship, again in the electric excitation dual protrusion
Injection detection pulse on the three-phase windings of pole motor, and the response current of B, C two-phase is obtained in detection end-of-pulsing instance sample
ibAnd icOr the response current i of C, A two-phasecAnd ia, determine minimum phase winding self-induction；
S3: by the minimum phase winding self-induction, estimate the initial position of electric excitation biconvex electrode electric machine rotor, determine electricity
Excitation biconvex electrode electric machine position-sensor-free can low speed start when initial power-up phase.
Further speaking, the step S1 determines response current ia、ibWith winding self-induction La、LbBetween relationship, specifically such as
Under:
S1.1: it in electric excitation biconvex electrode electric machine drive system, is infused on the electric excitation biconvex electrode electric machine three-phase windings
Enter to detect pulse A+B+C-；
S1.2: after the injection detection pulse A+B+C-, A, B two-phase is obtained in detection end-of-pulsing instance sample
Response current iaAnd ib, determine the winding self-induction L of A, B two-phaseaAnd LbBetween following two relationship, specifically:
Wherein: iaFor the response current of A phase, ibFor the response current of B phase, LaFor the winding self-induction of A phase, LbFor B phase around
Group self-induction.
Further speaking, the step S2 determines minimum phase winding self-induction, specific as follows:
S2.1: as the response current ia、ibWith winding self-induction La、LbBetween relationship be La< Lb,ia> ibWhen, institute
It states on electric excitation biconvex electrode electric machine three-phase windings, re-injects detection pulse C+A+B-；
As the response current ia、ibWith winding self-induction La、LbBetween relationship be La> Lb,ia< ibWhen, it is encouraged in the electricity
On magnetic double salient-pole electric machine three-phase windings, detection pulse B+C+A- is re-injected；
S2.2: when the detection pulse re-injected is C+A+B-, in detection end-of-pulsing instance sample C, A two-phase response
Electric current icAnd ia；
When the detection pulse re-injected is B+C+A-, in the response electricity of detection end-of-pulsing instance sample B, C two-phase
Flow ibAnd ic；
S2.3: when the response current that sampling obtains is icAnd ia, work as ic< iaWhen, minimum phase winding self-induction is the winding of A phase
Self-induction La, work as ic> iaWhen, minimum phase winding self-induction is the winding self-induction L of C phasec；
When the response current that sampling obtains is ibAnd ic, work as ib< icWhen, minimum phase winding self-induction is the winding self-induction of C phase
Lc, work as ib> icWhen, minimum phase winding self-induction is the winding self-induction L of B phaseb。
Further speaking, the detection pulse A+B+C- indicates the conducting of A, B two-phase upper tube, the conducting of C phase down tube；
The detection pulse C+A+B- indicates the conducting of C, A two-phase upper tube, the conducting of B phase down tube；
The detection pulse B+C+A- indicates the conducting of B, C two-phase upper tube, the conducting of A phase down tube.
Further speaking, the step S3 determine electric excitation biconvex electrode electric machine position-sensor-free can low speed start when
Initial power-up phase, it is specific as follows:
S3.1: according to the minimum phase winding self-induction, the initial position of electric excitation biconvex electrode electric machine rotor is estimated；
S3.2: when the initial position of the electric excitation biconvex electrode electric machine rotor is sector 1, three phase full bridge power conversion is stated
First power tube Q of device1With the second power tube Q2Conducting, the A phase winding lead to positive electricity, and the C phase winding leads to negative electricity；
When the initial position of the electric excitation biconvex electrode electric machine rotor is sector 2, the three phase full bridge power inverter
Third power tube Q3With the 4th power tube Q4Conducting, the B phase winding lead to positive electricity, and the A phase winding leads to negative electricity；
When the initial position of the electric excitation biconvex electrode electric machine rotor is sector 3, the three phase full bridge power inverter
The 5th power tube Q5With the 6th power tube Q6Conducting, the C phase winding lead to positive electricity, and the B phase winding leads to negative electricity.
Further speaking, the step S3.1 estimates the initial position of electric excitation biconvex electrode electric machine rotor, specifically:
As the winding self-induction L that minimum phase winding self-induction is A phaseaWhen, the initial bit of the electric excitation biconvex electrode electric machine rotor
It is set to sector 3, i.e. rotor is located at 240 °~360 ° sections；
As the winding self-induction L that minimum phase winding self-induction is B phasebWhen, the initial bit of the electric excitation biconvex electrode electric machine rotor
It is set to sector 1, i.e. rotor is located at 0 °~120 ° sections；
As the winding self-induction L that minimum phase winding self-induction is C phasecWhen, the initial bit of the electric excitation biconvex electrode electric machine rotor
It is set to sector 2, i.e. rotor is located at 120 °~240 ° sections.
The utility model has the advantages that compared with prior art, technical solution of the present invention has following advantageous effects:
(1) initial position of rotor estimation method of the invention is according to the minimum phase of electric excitation biconvex electrode electric machine inductance and rotor institute
In the one-to-one characteristic in sector, the minimum original position of electric motor's rotator that mutually carries out of detection pulse search self-induction is injected by two steps and is estimated
Meter, shortens the rotor position estimate time, improves system initial start performance to a certain extent；
(2) it is double to be able to achieve electrical excitation to initial position of rotor estimation method of the invention without increasing additional hardware circuit
The estimation of salient pole machine rotor initial sector；
(3) initial position of rotor estimation method of the invention detection impulse response current amplitude is smaller, and rotor is initial
Location estimation is not influenced by magnetic circuit saturation.
Detailed description of the invention
Fig. 1 is electric excitation biconvex electrode electric machine driving system structure figure of the invention；
Fig. 2 is 12/8 pole electric excitation biconvex electrode electric machine sectional view of the invention；
Fig. 3 is electric excitation biconvex electrode electric machine three-phase self-induction curve and energization rule schema of the invention；
Fig. 4 is the implementation flow chart of the method for the present invention；
Equivalent circuit diagram when Fig. 5 is present invention injection detection pulse A+B+C-.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Wherein, described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Therefore, below to the embodiment of the present invention provided in the accompanying drawings
Detailed description be not intended to limit the range of claimed invention, but be merely representative of selected embodiment of the invention.
Embodiment 1
With reference to Fig. 1, Fig. 2 and Fig. 4, a kind of two-step electric excitation biconvex electrode electric machine initial position of rotor is present embodiments provided
Estimation method specifically comprises the following steps:
Step S1: referring to Fig. 5, by the three phase full bridge power inverter in electric excitation biconvex electrode electric machine drive system,
Injection detection pulse A+B+C- on the three-phase windings of electric excitation biconvex electrode electric machine, and in detection end-of-pulsing instance sample A phase
Response current iaWith the response current i of B phaseb, determine the response current i of A phaseaWith the response current i of B phaseb, A phase winding self-induction
LaWith the winding self-induction L of B phasebBetween relationship.It is specific as follows:
Step S1.1: in electric excitation biconvex electrode electric machine drive system, on the three-phase windings of electric excitation biconvex electrode electric machine
Injection detection pulse A+B+C-, wherein detection pulse A+B+C- indicates the conducting of A phase upper tube, the conducting of B phase upper tube, the conducting of C phase down tube,
That is the first power tube Q of three phase full bridge power inverter1, the second power tube Q2With third power tube Q3It is switched on.
Step S1.2: after injection detects pulse A+B+C-, in the response current i of detection end-of-pulsing instance sample A phasea
With the response current i of B phaseb。
According to the principle of " phase winding self-induction is bigger, and electric current rising is slower, and end-of-pulsing time of day response electric current is smaller ", pass through
The response current i of A phaseaWith the response current i of B phasebBetween size relation, determine the winding self-induction L of A, B two-phaseaAnd LbIt
Between following two relationship, specifically:
Wherein: iaFor the response current of A phase, ibFor the response current of B phase, LaFor the winding self-induction of A phase, LbFor B phase around
Group self-induction.
Step S2: according to the winding self-induction L of A phase in step S1.2aWith the winding self-induction L of B phasebBetween size relation, then
Secondary injection detection the pulse C+A+B- or B+C+A- on the three-phase windings of electric excitation biconvex electrode electric machine, and when detecting end-of-pulsing
Carve the response current i of sampling B phasebWith the response current i of C phasecOr the response current i of C phasecWith the response current i of A phasea, determine
Minimum phase winding self-induction out.It is specific as follows:
Step S2.1: according to the winding self-induction L of A phase in step S1.2aWith the winding self-induction L of B phasebBetween size relation,
Injection detection the pulse C+A+B- or B+C+A- on the three-phase windings of electric excitation biconvex electrode electric machine again, specifically:
As the winding self-induction L of A phaseaWith the winding self-induction L of B phasebBetween size relation be La< Lb,ia> ibWhen, in electricity
On the three-phase windings of excitation biconvex electrode electric machine, detection pulse is re-injected, detection pulse at this time is C+A+B-.Wherein detect arteries and veins
Rushing C+A+B- indicates the conducting of C phase upper tube, the conducting of A phase upper tube, the conducting of B phase down tube, i.e. the first function of three phase full bridge power inverter
Rate pipe Q1, the 5th power tube Q5With the 6th power tube Q6It is switched on.
As the winding self-induction L of A phaseaWith the winding self-induction L of B phasebBetween size relation be La> Lb,ia< ibWhen, in electricity
On the three-phase windings of excitation biconvex electrode electric machine, detection pulse is re-injected, detection pulse at this time is B+C+A-.Wherein detect arteries and veins
Rushing B+C+A- indicates the conducting of B phase upper tube, the conducting of C phase upper tube, the conducting of A phase down tube, the i.e. third of three phase full bridge power inverter
Power tube Q3, the 4th power tube Q4With the 5th power tube Q5It is switched on.
Step S2.2: it re-injects after detection pulse, in the response current i of detection end-of-pulsing instance sample B phasebWith
The response current i of C phasecOr the response current i of C phasecWith the response current i of A phasea, specifically:
When the detection pulse re-injected is C+A+B-, in detection end-of-pulsing instance sample C phase response current icAnd A
Phase response current ia。
When the detection pulse re-injected is B+C+A-, in the response current i of detection end-of-pulsing instance sample B phaseb
With C phase response current ic。
Step S2.3: by sampling obtained C phase response current ic, A phase response current iaOr the response current i of B phaseb、C
Phase response current ic, determine minimum phase winding self-induction, specifically:
When the response current of sampling is C phase response current icWith A phase response current iaWhen, compare C phase response current icAnd A
Phase response current iaBetween size.
Work as ic< iaWhen, minimum phase winding self-induction is the winding self-induction L of A phasea, work as ic> iaWhen, minimum phase winding self-induction is C
The winding self-induction L of phasec。
As the response current i that the response current of sampling is B phasebWith C phase response current icWhen, compare the response current i of B phaseb
With C phase response current icBetween size.
Work as ib< icWhen, minimum phase winding self-induction is the winding self-induction L of C phasec, work as ib> icWhen, minimum phase winding self-induction is B
The winding self-induction L of phaseb。
Step S3: referring to Fig. 3, passes through the minimum phase winding self-induction determined in step S2.3, estimation electric excitation biconvex electrode electricity
The initial position of machine rotor, and determine electric excitation biconvex electrode electric machine position-sensor-free can low speed start when initial power-up
Phase.It is specific as follows:
Step S3.1: by step S2.3 determine minimum phase winding self-induction, electric excitation biconvex electrode electric machine three-phase from
Feel in curve and energization rule schema, estimate the initial position of electric excitation biconvex electrode electric machine rotor, specifically:
As the winding self-induction L that minimum phase winding self-induction is A phaseaWhen, the initial position of electric excitation biconvex electrode electric machine rotor is
Sector 3, i.e. rotor are located at 240 °~360 ° sections.
As the winding self-induction L that minimum phase winding self-induction is B phasebWhen, the initial position of electric excitation biconvex electrode electric machine rotor is
Sector 1, i.e. rotor are located at 0 °~120 ° sections.
As the winding self-induction L that minimum phase winding self-induction is C phasecWhen, the initial position of electric excitation biconvex electrode electric machine rotor is
Sector 2, i.e. rotor are located at 120 °~240 ° sections.
Step S3.2: when the initial position of electric excitation biconvex electrode electric machine rotor is sector 1, conducting three phase full bridge power becomes
First power tube Q of parallel operation1With the second power tube Q2, A phase winding leads to positive electricity, and C phase winding leads to negative electricity.
When the initial position of electric excitation biconvex electrode electric machine rotor is sector 2, the of conducting three phase full bridge power inverter
Three power tube Q3With the 4th power tube Q4, B phase winding leads to positive electricity, and A phase winding leads to negative electricity.
When the initial position of electric excitation biconvex electrode electric machine rotor is sector 3, the of conducting three phase full bridge power inverter
Five power tube Q5With the 6th power tube Q6, C phase winding leads to positive electricity, and B phase winding leads to negative electricity.
The initial position of rotor estimation of electric excitation biconvex electrode electric machine can be realized in S1- step S3 through the above steps, it is only necessary to
Inject 2 detection pulses, it will be able to effectively improve system initial start performance, and this method can be suitable for low speed and start rank
The rotor position estimate of section.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structures and methods are not limited thereto.So if this field
Those of ordinary skill is enlightened by it, without departing from the spirit of the invention, is not inventively designed and the skill
The similar frame mode of art scheme and embodiment, all belong to the scope of protection of the present invention.
Claims (6)
1. a kind of two-step electric excitation biconvex electrode electric machine initial position of rotor estimation method, which is characterized in that the method is specific
Include the following steps:
S1: the injection detection pulse A+B+C- on the three-phase windings of electric excitation biconvex electrode electric machine, and at the detection end-of-pulsing moment
Sample the response current i of A, B two-phaseaAnd ib, determine the response current ia、ibWith winding self-induction La、LbBetween relationship；
S2: according to the response current ia、ibWith winding self-induction La、LbBetween relationship, again in electric excitation biconvex electrode electricity
Injection detection pulse on the three-phase windings of machine, and the response current i of B, C two-phase is obtained in detection end-of-pulsing instance samplebAnd ic
Or the response current i of C, A two-phasecAnd ia, determine minimum phase winding self-induction；
S3: by the minimum phase winding self-induction, estimate the initial position of electric excitation biconvex electrode electric machine rotor, determine electrical excitation
Double-salient-pole electric machine without position sensor can low speed start when initial power-up phase.
2. a kind of two-step electric excitation biconvex electrode electric machine initial position of rotor estimation method according to claim 1, special
Sign is that the step S1 determines response current ia、ibWith winding self-induction La、LbBetween relationship, it is specific as follows:
S1.1: in electric excitation biconvex electrode electric machine drive system, inspection is injected on the electric excitation biconvex electrode electric machine three-phase windings
Survey pulse A+B+C-；
S1.2: after the injection detection pulse A+B+C-, the response of A, B two-phase is obtained in detection end-of-pulsing instance sample
Electric current iaAnd ib, determine the winding self-induction L of A, B two-phaseaAnd LbBetween following two relationship, specifically:
Wherein: iaFor the response current of A phase, ibFor the response current of B phase, LaFor the winding self-induction of A phase, LbFor B phase winding from
Sense.
3. a kind of two-step electric excitation biconvex electrode electric machine initial position of rotor estimation method according to claim 1 or 2,
It being characterized in that, the step S2 determines minimum phase winding self-induction, specific as follows:
S2.1: as the response current ia、ibWith winding self-induction La、LbBetween relationship be La< Lb,ia> ibWhen, in the electricity
On excitation biconvex electrode electric machine three-phase windings, detection pulse C+A+B- is re-injected；
As the response current ia、ibWith winding self-induction La、LbBetween relationship be La> Lb,ia< ibWhen, it is double in the electrical excitation
On salient-pole machine three-phase windings, detection pulse B+C+A- is re-injected；
S2.2: when the detection pulse re-injected is C+A+B-, in detection end-of-pulsing instance sample C, A two-phase response current
icAnd ia；
When the detection pulse re-injected is B+C+A-, in the response current i of detection end-of-pulsing instance sample B, C two-phasebWith
ic；
S2.3: when the response current that sampling obtains is icAnd ia, work as ic< iaWhen, minimum phase winding self-induction is the winding self-induction of A phase
La, work as ic> iaWhen, minimum phase winding self-induction is the winding self-induction L of C phasec；
When the response current that sampling obtains is ibAnd ic, work as ib< icWhen, minimum phase winding self-induction is the winding self-induction L of C phasec, when
ib> icWhen, minimum phase winding self-induction is the winding self-induction L of B phaseb。
4. a kind of two-step electric excitation biconvex electrode electric machine initial position of rotor estimation method according to claim 3, special
Sign is that the detection pulse A+B+C- indicates the conducting of A, B two-phase upper tube, the conducting of C phase down tube；
The detection pulse C+A+B- indicates the conducting of C, A two-phase upper tube, the conducting of B phase down tube；
The detection pulse B+C+A- indicates the conducting of B, C two-phase upper tube, the conducting of A phase down tube.
5. a kind of two-step electric excitation biconvex electrode electric machine initial position of rotor estimation method according to claim 3, special
Sign is, the step S3 determines that electric excitation biconvex electrode electric machine position-sensor-free being capable of initial power-up of low speed when starting
Phase, specific as follows:
S3.1: according to the minimum phase winding self-induction, the initial position of electric excitation biconvex electrode electric machine rotor is estimated；
S3.2: when the initial position of the electric excitation biconvex electrode electric machine rotor is sector 1, three phase full bridge power inverter is stated
First power tube Q1With the second power tube Q2Conducting, the A phase winding lead to positive electricity, and the C phase winding leads to negative electricity；
When the initial position of the electric excitation biconvex electrode electric machine rotor is sector 2, the of the three phase full bridge power inverter
Three power tube Q3With the 4th power tube Q4Conducting, the B phase winding lead to positive electricity, and the A phase winding leads to negative electricity；
When the initial position of the electric excitation biconvex electrode electric machine rotor is sector 3, the of the three phase full bridge power inverter
Five power tube Q5With the 6th power tube Q6Conducting, the C phase winding lead to positive electricity, and the B phase winding leads to negative electricity.
6. a kind of two-step electric excitation biconvex electrode electric machine initial position of rotor estimation method according to claim 5, special
Sign is that the step S3.1 estimates the initial position of electric excitation biconvex electrode electric machine rotor, specifically:
As the winding self-induction L that minimum phase winding self-induction is A phaseaWhen, the initial position of the electric excitation biconvex electrode electric machine rotor is fan
Area 3, i.e. rotor are located at 240 °~360 ° sections；
As the winding self-induction L that minimum phase winding self-induction is B phasebWhen, the initial position of the electric excitation biconvex electrode electric machine rotor is fan
Area 1, i.e. rotor are located at 0 °~120 ° sections；
As the winding self-induction L that minimum phase winding self-induction is C phasecWhen, the initial position of the electric excitation biconvex electrode electric machine rotor is fan
Area 2, i.e. rotor are located at 120 °~240 ° sections.
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Application publication date: 20190917 Assignee: SUZHOU SAIDEER INTELLIGENT TECHNOLOGY Co.,Ltd. Assignor: HOHAI University Contract record no.: X2021980000982 Denomination of invention: A two-step rotor initial position estimation method for doubly salient electro-magnetic machines Granted publication date: 20201027 License type: Common License Record date: 20210203 |