CN105305916A - PMSM stator flux linkage weak magnetic given method - Google Patents

PMSM stator flux linkage weak magnetic given method Download PDF

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Publication number
CN105305916A
CN105305916A CN201510644227.4A CN201510644227A CN105305916A CN 105305916 A CN105305916 A CN 105305916A CN 201510644227 A CN201510644227 A CN 201510644227A CN 105305916 A CN105305916 A CN 105305916A
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China
Prior art keywords
given
rotating speed
synchronous motor
magnetic
magnetic linkage
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CN201510644227.4A
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Chinese (zh)
Inventor
魏海峰
韦汉培
张懿
朱学青
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江苏科技大学
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Priority to CN201510644227.4A priority Critical patent/CN105305916A/en
Publication of CN105305916A publication Critical patent/CN105305916A/en

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Abstract

The invention discloses a PMSM (permanent magnet synchronous motor) stator flux linkage weak magnetic given method. The method comprises steps that, a rated rotating speed of a PMSM is contrasted with an actual rotating speed, if the actual rotating speed is higher than the rated rotating speed, according to parameters provided by a production manufacturer, or a mutual inductance flux linkage is calculated, difference of the given rotating speed and the actual rotating speed is inputted to a PI adjuster, output is taken as a d-axis current id for excitation control, the difference of the given rotating speed omegaref and the actual rotating speed omega is processed through a PI_2 adjuster, a given torque Te<*> is outputted, difference between the given torque Te<*> and an actual torque Te<*> is processed through a PI_3 adjuster, and the output is taken as a current q-axis component iq for torque control. Self-inductance flux linkages of a d axis and a q axis in a d-q coordinate system are calculated, and a given stator flux linkage amplitude can be calculated according to the mutual inductance flux and the self-inductance flux linkage. The method is simple and effective, the internal structure of the motor and control system hardware are unnecessary to change in a realization process, the control process is easier to realize, a motor speed regulation scope is effectively expanded, and motor production cost and control cost are reduced.

Description

A kind of given method of weak magnetic of permanent-magnetic synchronous motor stator magnetic linkage

Technical field

The invention belongs to Motor Control Field, particularly the given method of the weak magnetic of a kind of permanent-magnetic synchronous motor stator magnetic linkage.

Background technology

Permagnetic synchronous motor requires to be widely used in higher speed-adjusting driving system at track, traffic, electric traction, electric automobile etc. with its high efficiency, high power density and high torque (HT) ratio of inertias characteristic.

In order to realize permanent magnet synchronous generator actuated by weak field, traditional method roughly can be divided into both direction, i.e. feed forward type adjusted open loop and reaction type closed-loop adjustment.The former is the Mathematical Modeling based on motor body itself, when invariable power district runs, judges and regulate weak magnetoelectricity stream set-point for the analysis between weak magnetic area, relies on motor mathematical model formula to carry out derivation and calculates.The defect of feed forward type adjusted open loop method is motor model parameter dependence comparatively strong, and Algorithm robustness is general.Reaction type closed-loop adjustment method comprises look-up table, gradient descent method, and maximum torque control method etc., defect is that algorithm is very complicated, is difficult to practical application.

Based on As-Is, the present inventor furthers investigate the given method of stator magnetic linkage amplitude during permanent magnet synchronous generator actuated by weak field, and this case produces thus.

Summary of the invention

The object of the invention is to propose the given method of the weak magnetic of a kind of permanent-magnetic synchronous motor stator magnetic linkage, it can effectively widen electric machine speed regulation scope, reduces the starting time of permagnetic synchronous motor, the operating efficiency of lifting motor.

In order to reach above-mentioned purpose, solution of the present invention is:

A kind of given method of weak magnetic of permanent-magnetic synchronous motor stator magnetic linkage, comprises the steps:

(1) actual speed ω and the rated speed ω of permagnetic synchronous motor is compared nif, ω > ω nenter step (2), otherwise termination routine;

(2) rotor permanent magnet magnetic linkage ψ is set f;

(3) the self-inductance magnetic linkage L of d axle under d-q coordinate system, q axle is set di d, L qi q;

(4) d axle component ψ is calculated d=L di d+ ψ f, q axle component ψ q=L qi q, thus according to obtain stator magnetic linkage amplitude set-point

In above-mentioned steps (2), rotor permanent magnet chain ψ fbe as the criterion with the parameter that the manufacturer of permagnetic synchronous motor provides.

In above-mentioned steps (2), rotor permanent magnet magnetic linkage ψ faccording to calculate, wherein, U nthe specified phase voltage peak value of permagnetic synchronous motor, U dcrated voltage, ω nrated angular velocity, f nit is rated frequency.

In above-mentioned steps (3), d shaft current i destablishing method be: by given rotating speed ω refpI_1 adjuster is inputted, using output as the d shaft current i being used for excitation con-trol with the deviation of actual speed ω d.

In above-mentioned steps (3), q shaft current i qestablishing method be: by given rotating speed ω refwith the deviation of actual speed ω through PI_2 adjuster, export given torque by given torque with actual torque T edeviation through PI_3 adjuster, export as the q shaft current i of direct torque q;

After adopting such scheme, the inventive method is simple and effective, and needn't change internal structure and the control system hardware of motor in implementation procedure, control procedure more easily realizes, effectively widen electric machine speed regulation scope, reduce motor and produce and control cost, lifting motor operating efficiency.

Accompanying drawing explanation

Fig. 1 is permanent-magnetic synchronous motor stator magnetic linkage analysis principle figure;

Fig. 2 is the d axle component i of permagnetic synchronous motor dgiven method figure;

Fig. 3 is the q axle component i of permagnetic synchronous motor qgiven method figure;

Fig. 4 is flow chart of the present invention.

Embodiment

Below with reference to accompanying drawing, technical scheme of the present invention is described in detail.

Composition graphs 1, analyzes stator magnetic linkage, and the magnetic linkage that stator magnetic linkage is produced by stator winding self-induction and rotor permanent magnet encourage mutual inductance magnetic linkage two parts of generation to form on stator winding, under d-q coordinate system, and stator magnetic linkage ψ scomponent ψ d, ψ qcomputing formula respectively: ψ d=L di d+ ψ f, ψ q=L qi q, in formula, i d, i qbe respectively d axle, q shaft current, L d, L qbe respectively permagnetic synchronous motor d axle, q axle inductance, ψ ffor mutual inductance magnetic linkage.Wherein, when d shaft current is negative value, effectively can weaken the amplitude of stator magnetic linkage; Rotor permanent magnet magnetic linkage is then determined by permagnetic synchronous motor parameter, therefore, and can by setting suitable current value i d, i q, thus calculate suitable stator magnetic linkage amplitude set-point the weak magnetic field operation realizing permagnetic synchronous motor controls.

Based on above analysis, the invention provides the given method of the weak magnetic of a kind of permanent-magnetic synchronous motor stator magnetic linkage, coordinate shown in Fig. 4, comprise the steps:

(1) rated speed setting permagnetic synchronous motor is ω n, measure the actual speed ω of permagnetic synchronous motor, and with rated speed ω nrelatively, due to only when actual speed is higher than rated speed, permagnetic synchronous motor just can operate in invariable power district, therefore first needs to confirm ω > ω n, otherwise termination routine;

(2) mutual inductance magnetic linkage ψ is set f: if the manufacturer of permagnetic synchronous motor provides permagnetic synchronous motor parameter, be then as the criterion with the parameter provided; If do not provide parameter, then basis u nspecified phase voltage peak value, U dcthe rated voltage of motor, ω nrated angular velocity, f nit is rated frequency.

(3) self-inductance magnetic linkage is set: under d-q coordinate system, the self-inductance magnetic linkage of d axle, q axle is L respectively di d, L qi q, wherein, L d, L qbeing respectively permagnetic synchronous motor d axle, q axle inductance, is fixed value, therefore needs to set i d, i q, specifically, by given rotating speed ω refpi regulator is inputted, using output as the d shaft current i being used for excitation con-trol with the deviation of actual speed ω d, given rotating speed ω refwith the deviation of actual speed ω through PI_2 adjuster, export given torque given torque with actual torque T edeviation through PI_3 adjuster, export as the electric current q axle component i of direct torque q, as shown in Figure 2 and Figure 3;

(4) the mutual inductance magnetic linkage calculated according to step (2), (3) and self-inductance magnetic linkage, calculate d axle component ψ d=L di d+ ψ f, q axle component ψ q=L qi q, thus according to obtain stator magnetic linkage amplitude set-point

Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.

Claims (5)

1. the given method of the weak magnetic of permanent-magnetic synchronous motor stator magnetic linkage, is characterized in that comprising the steps:
(1) the rated speed ω of permagnetic synchronous motor is compared nwith actual speed ω, if ω > is ω nenter step (2), otherwise termination routine;
(2) mutual inductance magnetic linkage ψ is set f;
(3) the self-inductance magnetic linkage L of d axle under d-q coordinate system, q axle is set di d, L qi q;
(4) d axle component ψ is calculated d=L di d+ ψ f, q axle component ψ q=L qi q, thus according to obtain stator magnetic linkage amplitude set-point
2. the given method of the weak magnetic of permanent-magnetic synchronous motor stator magnetic linkage as claimed in claim 1, is characterized in that: in step (2), rotor permanent magnet chain ψ fbe as the criterion with the parameter that the manufacturer of permagnetic synchronous motor provides.
3. the given method of the weak magnetic of permanent-magnetic synchronous motor stator magnetic linkage as claimed in claim 1, is characterized in that: in step (2), rotor permanent magnet magnetic linkage ψ faccording to calculate, wherein, U nthe specified phase voltage peak value of permagnetic synchronous motor, U dcrated voltage, ω nrated angular velocity, f nit is rated frequency.
4. the given method of the weak magnetic of permanent-magnetic synchronous motor stator magnetic linkage as claimed in claim 1, is characterized in that: in step (3), d shaft current i destablishing method be: given rotating speed ω refinput PI_1 adjuster with the deviation of actual speed ω, export d shaft current component i d.
5. the given method of the weak magnetic of permanent-magnetic synchronous motor stator magnetic linkage as claimed in claim 1, is characterized in that: in step (3), q axle component i qestablishing method be: by given rotating speed ω refinput PI_2 adjuster with the deviation of actual speed ω, export given torque given torque with actual torque T edeviation input PI_3 adjuster, export q shaft current component i q.
CN201510644227.4A 2015-10-08 2015-10-08 PMSM stator flux linkage weak magnetic given method CN105305916A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106602939A (en) * 2016-11-30 2017-04-26 中冶南方(武汉)自动化有限公司 Permanent-magnet synchronous electrical machine torque control method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130328508A1 (en) * 2012-06-12 2013-12-12 Hyundai Motor Company Method for controlling interior permanent magnet synchronous motor
CN104767445A (en) * 2015-03-30 2015-07-08 北京空间机电研究所 Current-feedback-free surface mounted type permanent-magnet synchronous motor torque control method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130328508A1 (en) * 2012-06-12 2013-12-12 Hyundai Motor Company Method for controlling interior permanent magnet synchronous motor
CN104767445A (en) * 2015-03-30 2015-07-08 北京空间机电研究所 Current-feedback-free surface mounted type permanent-magnet synchronous motor torque control method

Non-Patent Citations (2)

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Title
司文等: "永磁同步电机的弱磁控制方法", 《电子设计工程》 *
方晓春等: "基于交直轴电流耦合的单电流调节器永磁同步电机弱磁控制", 《电工技术学报》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106602939A (en) * 2016-11-30 2017-04-26 中冶南方(武汉)自动化有限公司 Permanent-magnet synchronous electrical machine torque control method
CN106602939B (en) * 2016-11-30 2019-06-18 中冶南方(武汉)自动化有限公司 A kind of permanent magnet synchronous motor method for controlling torque

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