CN105024604A - Field weakening control method and device of permanent magnet synchronous motor - Google Patents
Field weakening control method and device of permanent magnet synchronous motor Download PDFInfo
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Abstract
The present invention discloses a field weakening control method and device of a permanent magnet synchronous motor, relates to the field of permanent magnet synchronous motors, and aims to shorten debug time and raise system performance. The method comprises acquiring a first adjusting value of d-axis current according to an actual value of direct current bus voltage; acquiring a second adjusting value of the d-axis current according to an actual value of an index parameter of a rotor, the index parameter comprising any one of frequency, angular frequency and rotating speed; acquiring an adjusting value of d-axis current according to the first adjusting value and the second adjusting value; acquiring a target value of the d-axis current according to an initial set value of the d-axis current and the adjusting value of the d-axis current, the target value of the d-axis current being a negative value; and controlling the permanent magnet synchronous motor to operate according to the target value of the d-axis current.
Description
Technical field
The present invention relates to permagnetic synchronous motor field, particularly relate to a kind of field weakening control method and device of permagnetic synchronous motor.
Background technology
The vector control technology of permagnetic synchronous motor can make permagnetic synchronous motor obtain good transient response characteristic because of it, realizes the quick response to load disturbance and set-point change, and is used widely.In the vector control process of permagnetic synchronous motor, when the voltage that traction invertor is supplied to permagnetic synchronous motor reaches maximum, the back-emf of permagnetic synchronous motor can be reduced by the magnetic field (namely carrying out weak magnetics detect to permagnetic synchronous motor) reducing permagnetic synchronous motor, thus the rotating speed of jack.
At present, d axle (i.e. d-axis) electric current can be made by certain method to be less than 0, thus utilize its demagnetizing effect to reduce the magnetic field of permagnetic synchronous motor, and then realize weak magnetics detect.In prior art, d shaft current can be made to be less than 0 by following method: to utilize d shaft voltage Vdr and q shaft voltage Vqr to calculate neutral phase voltage Vr; Vr is compared with reference voltage Vbase, is finally regulated the Idr (i.e. d shaft current) obtaining bearing by negative feedback PI (Proportional Integral, proportional integral).The method realize block diagram as shown in Figure 1.
Because such scheme realizes weak magnetics detect by PI adjustment, and PI adjustment can bring following problem: the PI parameter testing time is long; Easy generation saturation integral, causes poor system performance.
Summary of the invention
The embodiment of the present invention provides a kind of field weakening control method and device of permagnetic synchronous motor, in order to shorten debug time, and improves systematic function.
For achieving the above object, embodiments of the invention adopt following technical scheme:
First aspect, provides a kind of field weakening control method of permagnetic synchronous motor, comprising:
The first regulated value of d shaft current is obtained according to the actual value of DC bus-bar voltage;
The second regulated value of d shaft current is obtained according to the actual value of the index parameter of rotor; Described index parameter comprise following any one: frequency, angular frequency, rotating speed;
According to described first regulated value and described second regulated value, obtain the regulated value of d shaft current;
According to the regulated value of the initial set-point of d shaft current and described d shaft current, obtain the desired value of d shaft current; Wherein, the desired value of described d shaft current is negative value;
Control described permagnetic synchronous motor according to the desired value of described d shaft current to run.
In conjunction with first aspect, in the implementation that the first is possible, described according to described first regulated value and described second regulated value, obtain the regulated value of d shaft current, comprising:
Described first regulated value is multiplied with described second regulated value, obtains the regulated value of d shaft current.
In conjunction with the first possible implementation of first aspect, in the implementation that the second is possible, the described actual value according to DC bus-bar voltage obtains the first regulated value of d shaft current, comprising:
The first regulated value of d shaft current is obtained according to the load characteristic of described permagnetic synchronous motor and the actual value of DC bus-bar voltage.
In conjunction with the first possible implementation of first aspect or the possible implementation of the second, in the implementation that the third is possible, actual value and described first regulated value of described DC bus-bar voltage are linear; And/or actual value and described second regulated value of described index parameter are linear.
In conjunction with the first possible implementation of first aspect, in the 4th kind of possible implementation, described described first regulated value to be multiplied with described second regulated value, to obtain the regulated value of d shaft current, comprising:
Described first regulated value is multiplied with described second regulated value, obtains intermediate regulations value;
After described intermediate regulations value is carried out amplitude limit, obtain the regulated value of d shaft current.
Second aspect, provides a kind of weak magnetics detect device of permagnetic synchronous motor, comprising:
First regulated value acquiring unit, for obtaining the first regulated value of d shaft current according to the actual value of DC bus-bar voltage;
Second regulated value acquiring unit, the actual value for the index parameter according to rotor obtains the second regulated value of d shaft current; Described index parameter comprise following any one: frequency, angular frequency, rotating speed;
The regulated value acquiring unit of d shaft current, for according to described first regulated value and described second regulated value, obtains the regulated value of d shaft current;
The desired value acquiring unit of d shaft current, for the regulated value according to the initial set-point of d shaft current and described d shaft current, obtains the desired value of d shaft current; Wherein, the desired value of described d shaft current is negative value;
Control unit, runs for controlling described permagnetic synchronous motor according to the desired value of described d shaft current.
In conjunction with second aspect, in the implementation that the first is possible, the regulated value acquiring unit of described d shaft current specifically for, described first regulated value is multiplied with described second regulated value, obtains the regulated value of d shaft current.
In conjunction with the first possible implementation of second aspect, in the implementation that the second is possible, described first regulated value acquiring unit specifically for, obtain the first regulated value of d shaft current according to the actual value of the load characteristic of described permagnetic synchronous motor and DC bus-bar voltage.
In conjunction with the first possible implementation of second aspect or the possible implementation of the second, in the implementation that the third is possible, actual value and described first regulated value of described DC bus-bar voltage are linear; And/or actual value and described second regulated value of described index parameter are linear.
In conjunction with the first possible implementation of second aspect, in the 4th kind of possible implementation, the regulated value acquiring unit of described d shaft current specifically for:
Described first regulated value is multiplied with described second regulated value, obtains intermediate regulations value;
After described intermediate regulations value is carried out amplitude limit, obtain the regulated value of d shaft current.
This programme, by obtaining the actual value of the index parameter of DC bus-bar voltage and rotor respectively to the impact of d shaft current, obtains the first regulated value and the second regulated value; Obtain the desired value of the d shaft current for negative value according to the first regulated value and the second regulated value, control permagnetic synchronous motor according to the desired value of d shaft current and run.Compared with prior art, this programme does not need to adopt PI to regulate, therefore, it is possible to shorten debug time, and can prevent because PI regulates the problem easily producing the systematic function difference that saturation integral causes.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 be the field weakening control method of a kind of permagnetic synchronous motor of the prior art realize block diagram;
The schematic flow sheet of the field weakening control method of a kind of permagnetic synchronous motor that Fig. 2 provides for the embodiment of the present invention one;
The schematic flow sheet of the field weakening control method of a kind of permagnetic synchronous motor that Fig. 3 provides for the embodiment of the present invention two;
The field weakening control method of a kind of permagnetic synchronous motor that Fig. 4 provides for the embodiment of the present invention two realize block diagram;
The field weakening control method of the another kind of permagnetic synchronous motor that Fig. 5 provides for the embodiment of the present invention two realize block diagram;
The structural representation of the weak magnetics detect device of a kind of permagnetic synchronous motor that Fig. 6 provides for the embodiment of the present invention three;
The structural representation of the weak magnetics detect device of a kind of permagnetic synchronous motor that Fig. 7 provides for the embodiment of the present invention four.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, herein term "and/or", being only a kind of incidence relation describing affiliated partner, can there are three kinds of relations in expression, and such as, A and/or B, can represent: individualism A, exists A and B simultaneously, these three kinds of situations of individualism B.
Embodiment one
As shown in Figure 2, be the field weakening control method of a kind of permagnetic synchronous motor that the embodiment of the present invention provides, comprise:
201: the first regulated value obtaining d shaft current according to the actual value of DC bus-bar voltage.
Exemplary, " permagnetic synchronous motor " in the embodiment of the present invention can be applied in plurality of devices, and this equipment can be direct current compressor etc.The executive agent of the embodiment of the present invention can be controller, and this controller can be the control unit in the equipment at permagnetic synchronous motor place, also can be the entity of the equipment independent of permagnetic synchronous motor place
" DC bus-bar voltage " refers to the DC bus-bar voltage of traction invertor.During specific implementation, the method can also comprise: the actual value obtaining DC bus-bar voltage; Method of the prior art specifically can be utilized to realize.
In order to the impact of DC bus-bar voltage on d shaft current is described, first following formula 1 and formula 2 are described:
Formula 1:
Wherein, u
dthe projection of voltage vector at d axle that traction invertor is supplied to permagnetic synchronous motor, u
qthe projection of voltage vector in q axle (quadrature axis) that traction invertor is supplied to permagnetic synchronous motor, ψ
dthe projection of magnetic linkage at d axle of rotor (permanent magnet), ψ
qthe projection of magnetic linkage at q axle, L
dd axle inductance, L
qbe the inductance of q axle, ω is the actual angular frequency of rotor, R
1for stator resistance, i
dthe d shaft current under rotor coordinate, i
qit is the q shaft current under rotor coordinate.
Formula 2:
Wherein, ψ
fit is the magnetic linkage of rotor.
Due to when carrying out weak magnetics detect to permagnetic synchronous motor, when permagnetic synchronous motor is generally in high frequency operation, now can ignores the pressure drop of stator resistance, therefore can obtain formula 3 according to formula 1 and formula 2:
Wherein, U is the amplitude that traction invertor is supplied to the voltage vector of permagnetic synchronous motor.Formula 4 can be obtained by formula 3:
owing to carrying out in the process of weak magnetics detect to permagnetic synchronous motor, DC bus-bar voltage U
dcequal with U, therefore can obtain formula 5:
According to formula 5, affect i
dparameter comprise: U
dc, ω, i
q, L
d, L
qand ψ
f.Usually, U
dcwith ω to i
dimpact larger.Due to when carrying out weak magnetics detect to permagnetic synchronous motor, d shaft current is negative value; Therefore, according to formula 5, when ω is constant, i
dabsolute value along with U
dcincrease and reduce, that is, U
dcwith i
dabsolute value be inversely proportional to, U
dcwith i
dbe directly proportional; Work as U
dctime constant, i
dabsolute value increase along with the increase of ω, that is, ω and i
dabsolute value be directly proportional, ω and i
dbe inversely proportional to.In the embodiment of the present invention, by U
dcto i
dimpact represent, by ω to i with " the first regulated value of d shaft current "
dimpact represent with " the second regulated value of d shaft current ".
Optionally, step 201 can comprise: the first regulated value obtaining d shaft current according to the load characteristic of described permagnetic synchronous motor and the actual value of described DC bus-bar voltage.Exemplary, when permagnetic synchronous motor is applied in a certain equipment, the load characteristic of this permagnetic synchronous motor can be the load characteristic of this equipment, such as, when this equipment is compressor, this optional mode can be: the first regulated value obtaining d shaft current according to the load characteristic of compressor and the actual value of described DC bus-bar voltage.
202: the second regulated value obtaining d shaft current according to the actual value of the index parameter of rotor; Described index parameter comprise following any one: frequency, angular frequency, rotating speed.
Exemplary, during specific implementation, the method can also comprise: the actual value determining the indication index parameter of rotor, and method of the prior art specifically can be utilized to realize.It should be noted that, the frequency f of rotor, between angular frequency and rotating speed n, meet following relation: ω=2 π f, n=60f/p, wherein, p refers to the number of pole-pairs of permagnetic synchronous motor rotating magnetic field.
Optionally, in order to reduce the amount of calculation of field weakening control method, the relation between the actual value of described DC bus-bar voltage and described first regulated value can be linear relationship; And/or the relation between the actual value of described index parameter and described second regulated value can be linear relationship.
203: according to described first regulated value and described second regulated value, obtain the regulated value of d shaft current.
Optionally, step 203 can be implemented as: be multiplied with described second regulated value by described first regulated value, obtain the regulated value of d shaft current.In addition, can also be embodied as: described first regulated value, described second regulated value are multiplied with-1, obtain the regulated value of d shaft current.
Optionally, step 203 can be implemented as: be multiplied with described second regulated value by described first regulated value, obtain intermediate regulations value; After described intermediate regulations value is carried out amplitude limit, obtain the regulated value of d shaft current.
204: according to the initial set-point of d shaft current and the regulated value of described d shaft current, obtain the desired value of d shaft current; Wherein, the desired value of described d shaft current is negative value.
Exemplary, the initial set-point of d shaft current is 0.When the regulated value of d shaft current is negative value, step 204 is specifically as follows: be added with the regulated value of d shaft current by the initial set-point of d shaft current, obtain the desired value of d shaft current; When the regulated value of d shaft current be on the occasion of time, step 204 is specifically as follows: the initial set-point of d shaft current and the regulated value of d shaft current are subtracted each other, obtain the desired value of d shaft current.
205: control described permagnetic synchronous motor according to the desired value of described d shaft current and run.
Exemplary, the concrete methods of realizing of step 205 can be the vector control method of permagnetic synchronous motor in prior art.
The field weakening control method of the permagnetic synchronous motor that the embodiment of the present invention provides, by obtaining the actual value of the index parameter of DC bus-bar voltage and rotor respectively to the impact of d shaft current, obtains the first regulated value and the second regulated value; Obtain the desired value of the d shaft current for negative value according to the first regulated value and the second regulated value, control permagnetic synchronous motor according to the desired value of d shaft current and run.Compared with prior art, this programme does not need to adopt PI to regulate, therefore, it is possible to shorten debug time, and can prevent because PI regulates the problem easily producing the systematic function difference that saturation integral causes.
Embodiment two
In the present embodiment, permagnetic synchronous motor is applied in compressor." index parameter " in embodiment one is in the present embodiment: rotating speed.As shown in Figure 3, the field weakening control method of the permagnetic synchronous motor that the present embodiment provides, comprising:
301: controller judges whether to need to carry out weak magnetics detect to permagnetic synchronous motor.
If not, then step 302 is performed; If so, then step 303 is performed.
Exemplary, controller can be determined to need to carry out weak magnetics detect to permagnetic synchronous motor under the instruction of user; When can be also maximum voltage at output voltage traction invertor being detected, determine to need to carry out weak magnetics detect to permagnetic synchronous motor.
302: using the desired value of the initial set-point of d shaft current as d shaft current; Wherein, the initial set-point of d shaft current is 0.
After performing step 302, perform step 308.
303: the actual value determining the actual value of DC bus-bar voltage and the rotating speed of rotor.
Exemplary, during specific implementation, through modulate circuit, the estimated value of DC bus-bar voltage can be sent to CPU (Central Processing Unit, central processing unit) AD (Analogto Digital, analog-to-digital conversion) analog sampling mouth, then by CPU software, the estimated value of DC bus-bar voltage is scaled the actual value of DC bus-bar voltage.In addition, the actual value of the rotating speed of rotor can be obtained by rotor flux estimator.
304: the first regulated value obtaining d shaft current according to the load characteristic of compressor and the actual value of DC bus-bar voltage, wherein, actual value and first regulated value of DC bus-bar voltage are linear.
Exemplary, the load characteristic of compressor is: when the running speed of compressor is higher, loading moment is larger.First regulated value is negative value.According to embodiment one, the absolute value of DC bus-bar voltage and the first regulated value is inversely proportional to.
305: the second regulated value obtaining d shaft current according to the actual value of rotating speed, wherein, the actual value of the angular frequency of rotor and second is adjusted to linear relationship.
Exemplary, the second regulated value is negative value.According to embodiment one, rotating speed is directly proportional to the absolute value of the second regulated value.
306: the first regulated value is multiplied with the second regulated value, obtain the regulated value of d shaft current.
307: the initial set-point of d shaft current and the regulated value of d shaft current are subtracted each other, obtains the desired value of d shaft current.
It should be noted that, during specific implementation, the action of amplitude limit can be performed within step 306, also can perform the action of amplitude limit in step 307.Concrete, step 306 can comprise: be multiplied with the second regulated value by the first regulated value, obtains intermediate regulations value; After intermediate regulations value is carried out amplitude limit, obtain the regulated value of d shaft current.Or step 307 can comprise: the initial set-point of d shaft current and the regulated value of d shaft current are subtracted each other, obtains intermediate objective value; After intermediate objective value is carried out amplitude limit, obtain the desired value of d shaft current.
Exemplary, the process of step 303-307 is called weak magnetics detect process, as shown in Figure 4, for the one of weak magnetics detect process realizes block diagram.Wherein, the initial set-point of d shaft current is i
d*, the regulated value of d shaft current is △ i
d, the desired value of d shaft current is i
dref, the first regulated value is △ i
d_ 1, second regulated value is △ i
d_ 2, the actual value of DC bus-bar voltage is U
dc, the actual value of angular frequency is ω.In addition, in this Fig. 4, comprise " amplitude limit " action for step 307 and be described.Wherein, intermediate objective value is
.
308: control permagnetic synchronous motor according to the desired value of d shaft current and run.
After performing step 308, then terminate.
Exemplary, the specific implementation process of step 308 as shown in Figure 5, specifically can comprise:
1), utilize current sensor to sample stator side U, V biphase current Ia and Ib of permagnetic synchronous motor, after clark conversion and park convert, obtain the actual value Iq of the q shaft current under the actual value Id of the d shaft current under rotor coordinate and rotor coordinate; Through rotor flux observer, obtain the actual value ω of angular frequency and the space angle θ of rotor field;
2), by the actual value ω of angular frequency and the desired value ω of angular frequency
refcompare, after comparison signal carries out PI adjustment, obtain the desired value i of q shaft current
qref;
3), by d shaft current desired value i
drefcompare with the actual value Id of the d shaft current under rotor reference axis, comparison signal obtains d axle output voltage Ud after carrying out PI adjustment; Q shaft current desired value i
qrefcompare with the actual value Iq of the q shaft current under rotor coordinate, comparison signal obtains q axle output voltage Uq after carrying out PI adjustment;
4), according to the space angle θ of rotor field, park inverse transformation is carried out to d axle output voltage Ud and q axle output voltage Uq, through SVPWM (Space Vector Pulse WidthModulation, space vector pulse width modulation) after, export six road PWM (Pulse WidthModulation, pulse width modulation) waveform; Utilize that six road PWM Waveform Control IGBT's (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) open shutoff, thus drive permagnetic synchronous motor to run.
The field weakening control method of the permagnetic synchronous motor that the embodiment of the present invention provides, by obtaining the actual value of the index parameter of DC bus-bar voltage and rotor respectively to the impact of d shaft current, obtains the first regulated value and the second regulated value; Obtain the desired value of the d shaft current for negative value according to the first regulated value and the second regulated value, control permagnetic synchronous motor according to the desired value of d shaft current and run.Compared with prior art, this programme does not need to adopt PI to regulate, therefore, it is possible to shorten debug time, and can prevent because PI regulates the problem easily producing the systematic function difference that saturation integral causes.
Embodiment three
As shown in Figure 6, be the weak magnetics detect device 6 of a kind of permagnetic synchronous motor that the embodiment of the present invention provides, in order to perform the field weakening control method of the permagnetic synchronous motor shown in Fig. 2, this device 6 comprises:
First regulated value acquiring unit 61, for obtaining the first regulated value of d shaft current according to the actual value of DC bus-bar voltage;
Second regulated value acquiring unit 62, the actual value for the index parameter according to rotor obtains the second regulated value of d shaft current; Described index parameter comprise following any one: frequency, angular frequency, rotating speed;
The regulated value acquiring unit 63 of d shaft current, for according to described first regulated value and described second regulated value, obtains the regulated value of d shaft current;
The desired value acquiring unit 64 of d shaft current, for the regulated value according to the initial set-point of d shaft current and described d shaft current, obtains the desired value of d shaft current; Wherein, the desired value of described d shaft current is negative value;
Control unit 65, runs for controlling described permagnetic synchronous motor according to the desired value of described d shaft current.
Optionally, the regulated value acquiring unit 63 of described d shaft current specifically for, described first regulated value is multiplied with described second regulated value, obtains the regulated value of d shaft current.
Optionally, described first regulated value acquiring unit 61 specifically for, obtain the first regulated value of d shaft current according to the actual value of the load characteristic of described permagnetic synchronous motor and DC bus-bar voltage.
Optionally, the actual value of described DC bus-bar voltage and described first regulated value linear; And/or actual value and described second regulated value of described index parameter are linear.
Optionally, described d shaft current regulated value acquiring unit 63 specifically for:
Described first regulated value is multiplied with described second regulated value, obtains intermediate regulations value;
After described intermediate regulations value is carried out amplitude limit, obtain the regulated value of d shaft current.
The weak magnetics detect device of the permagnetic synchronous motor that the embodiment of the present invention provides, by obtaining the actual value of the index parameter of DC bus-bar voltage and rotor respectively to the impact of d shaft current, obtains the first regulated value and the second regulated value; Obtain the desired value of the d shaft current for negative value according to the first regulated value and the second regulated value, control permagnetic synchronous motor according to the desired value of d shaft current and run.Compared with prior art, this programme does not need to adopt PI to regulate, therefore, it is possible to shorten debug time, and can prevent because PI regulates the problem easily producing the systematic function difference that saturation integral causes.
Embodiment four
As shown in Figure 7, be the weak magnetics detect device 7 of a kind of permagnetic synchronous motor that the embodiment of the present invention provides, in order to perform the field weakening control method of the permagnetic synchronous motor shown in Fig. 2, this device 7 comprises: memory 71 and processor 72, wherein,
Memory 71 is for storing one group of code, and this code is used for control processor 72 and performs following action:
The first regulated value of d shaft current is obtained according to the actual value of DC bus-bar voltage;
The second regulated value of d shaft current is obtained according to the actual value of the index parameter of rotor; Described index parameter comprise following any one: frequency, angular frequency, rotating speed;
According to described first regulated value and described second regulated value, obtain the regulated value of d shaft current;
According to the regulated value of the initial set-point of d shaft current and described d shaft current, obtain the desired value of d shaft current; Wherein, the desired value of described d shaft current is negative value;
Control described permagnetic synchronous motor according to the desired value of described d shaft current to run.
Optionally, described processor 72 specifically for, described first regulated value is multiplied with described second regulated value, obtains the regulated value of d shaft current.
Optionally, described processor 72 specifically for, obtain the first regulated value of d shaft current according to the actual value of the load characteristic of described permagnetic synchronous motor and DC bus-bar voltage.
Optionally, the actual value of described DC bus-bar voltage and described first regulated value linear; And/or actual value and described second regulated value of described index parameter are linear.
Optionally, described processor 72 specifically for:
Described first regulated value is multiplied with described second regulated value, obtains intermediate regulations value;
After described intermediate regulations value is carried out amplitude limit, obtain the regulated value of d shaft current.
The weak magnetics detect device of the permagnetic synchronous motor that the embodiment of the present invention provides, by obtaining the actual value of the index parameter of DC bus-bar voltage and rotor respectively to the impact of d shaft current, obtains the first regulated value and the second regulated value; Obtain the desired value of the d shaft current for negative value according to the first regulated value and the second regulated value, control permagnetic synchronous motor according to the desired value of d shaft current and run.Compared with prior art, this programme does not need to adopt PI to regulate, therefore, it is possible to shorten debug time, and can prevent because PI regulates the problem easily producing the systematic function difference that saturation integral causes.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that, disclosed system, apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit comprises, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that hardware also can be adopted to add SFU software functional unit realizes.
The above-mentioned integrated unit realized with the form of SFU software functional unit, can be stored in a computer read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the part steps of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, ROM (Read-Only Memory, read-only memory), RAM (Random Access Memory, random access memory), magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a field weakening control method for permagnetic synchronous motor, is characterized in that, comprising:
The first regulated value of d shaft current is obtained according to the actual value of DC bus-bar voltage;
The second regulated value of d shaft current is obtained according to the actual value of the index parameter of rotor; Described index parameter comprise following any one: frequency, angular frequency, rotating speed;
According to described first regulated value and described second regulated value, obtain the regulated value of d shaft current;
According to the regulated value of the initial set-point of d shaft current and described d shaft current, obtain the desired value of d shaft current; Wherein, the desired value of described d shaft current is negative value;
Control described permagnetic synchronous motor according to the desired value of described d shaft current to run.
2. method according to claim 1, is characterized in that, described according to described first regulated value and described second regulated value, obtains the regulated value of d shaft current, comprising:
Described first regulated value is multiplied with described second regulated value, obtains the regulated value of d shaft current.
3. method according to claim 2, is characterized in that, the described actual value according to DC bus-bar voltage obtains the first regulated value of d shaft current, comprising:
The first regulated value of d shaft current is obtained according to the load characteristic of described permagnetic synchronous motor and the actual value of DC bus-bar voltage.
4. according to the method in claim 2 or 3, it is characterized in that, actual value and described first regulated value of described DC bus-bar voltage are linear; And/or actual value and described second regulated value of described index parameter are linear.
5. method according to claim 2, is characterized in that, is describedly multiplied with described second regulated value by described first regulated value, obtains the regulated value of d shaft current, comprising:
Described first regulated value is multiplied with described second regulated value, obtains intermediate regulations value;
After described intermediate regulations value is carried out amplitude limit, obtain the regulated value of d shaft current.
6. a weak magnetics detect device for permagnetic synchronous motor, is characterized in that, comprising:
First regulated value acquiring unit, for obtaining the first regulated value of d shaft current according to the actual value of DC bus-bar voltage;
Second regulated value acquiring unit, the actual value for the index parameter according to rotor obtains the second regulated value of d shaft current; Described index parameter comprise following any one: frequency, angular frequency, rotating speed;
The regulated value acquiring unit of d shaft current, for according to described first regulated value and described second regulated value, obtains the regulated value of d shaft current;
The desired value acquiring unit of d shaft current, for the regulated value according to the initial set-point of d shaft current and described d shaft current, obtains the desired value of d shaft current; Wherein, the desired value of described d shaft current is negative value;
Control unit, runs for controlling described permagnetic synchronous motor according to the desired value of described d shaft current.
7. device according to claim 6, is characterized in that, the regulated value acquiring unit of described d shaft current specifically for, described first regulated value is multiplied with described second regulated value, obtains the regulated value of d shaft current.
8. device according to claim 7, is characterized in that, described first regulated value acquiring unit specifically for, obtain the first regulated value of d shaft current according to the actual value of the load characteristic of described permagnetic synchronous motor and DC bus-bar voltage.
9. the device according to claim 7 or 8, is characterized in that, actual value and described first regulated value of described DC bus-bar voltage are linear; And/or actual value and described second regulated value of described index parameter are linear.
10. device according to claim 7, is characterized in that, the regulated value acquiring unit of described d shaft current specifically for:
Described first regulated value is multiplied with described second regulated value, obtains intermediate regulations value;
After described intermediate regulations value is carried out amplitude limit, obtain the regulated value of d shaft current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410174232.9A CN105024604B (en) | 2014-04-28 | 2014-04-28 | A kind of method and a device for controlling weak magnetism of permagnetic synchronous motor |
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| CN106452244A (en) * | 2016-10-27 | 2017-02-22 | 江苏大学 | Maximum torque output linear field weakening control method and system of embedded permanent magnet synchronous motor |
| CN107086544A (en) * | 2017-05-10 | 2017-08-22 | 广东美的暖通设备有限公司 | Overvoltage crowbar, three-phase drive motor and air conditioner |
| CN107979320A (en) * | 2017-12-30 | 2018-05-01 | 易事特集团股份有限公司 | Brushless doubly-fed motor speed measurement method and system |
| CN112910232A (en) * | 2021-03-19 | 2021-06-04 | 青岛海信日立空调系统有限公司 | Air conditioning system |
| CN114647270A (en) * | 2022-03-31 | 2022-06-21 | 广东海悟科技有限公司 | Method and device for controlling bus voltage of fan, storage medium and electronic device |
| CN116281613A (en) * | 2023-01-14 | 2023-06-23 | 中联重科股份有限公司 | Method, apparatus and storage medium for controlling permanent magnet synchronous motor |
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| CN112910232A (en) * | 2021-03-19 | 2021-06-04 | 青岛海信日立空调系统有限公司 | Air conditioning system |
| CN112910232B (en) * | 2021-03-19 | 2022-04-19 | 青岛海信日立空调系统有限公司 | Air conditioning system |
| CN114647270A (en) * | 2022-03-31 | 2022-06-21 | 广东海悟科技有限公司 | Method and device for controlling bus voltage of fan, storage medium and electronic device |
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| CN116281613B (en) * | 2023-01-14 | 2024-07-26 | 中联重科股份有限公司 | Method, apparatus and storage medium for controlling permanent magnet synchronous motor |
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