WO2006058505A1 - Procede de changement du courant de fuite d'un moteur a reluctance et moteur a reluctance du type a polarisation magnetique et a indentations - Google Patents

Procede de changement du courant de fuite d'un moteur a reluctance et moteur a reluctance du type a polarisation magnetique et a indentations Download PDF

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Publication number
WO2006058505A1
WO2006058505A1 PCT/CN2005/002081 CN2005002081W WO2006058505A1 WO 2006058505 A1 WO2006058505 A1 WO 2006058505A1 CN 2005002081 W CN2005002081 W CN 2005002081W WO 2006058505 A1 WO2006058505 A1 WO 2006058505A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
reluctance motor
permanent magnet
cogging
magnetic flux
Prior art date
Application number
PCT/CN2005/002081
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English (en)
Chinese (zh)
Inventor
Zhenfeng Zhu
Original Assignee
Zhenfeng Zhu
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhenfeng Zhu filed Critical Zhenfeng Zhu
Publication of WO2006058505A1 publication Critical patent/WO2006058505A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/02—Synchronous motors
    • H02K19/10—Synchronous motors for multi-phase current
    • H02K19/103—Motors having windings on the stator and a variable reluctance soft-iron rotor without windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/17—Stator cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/223—Rotor cores with windings and permanent magnets

Definitions

  • the invention belongs to the field of electromechanical, and particularly relates to a method for changing the magnetic flux leakage of a reluctance motor and a cogging magnetic reluctance motor. Background technique
  • the reluctance motor has basically the same structure as the ordinary motor, and also includes the stator, the rotor and the outer casing, and the difference is that the rotor of the reluctance motor is usually non-magnetic, and a magnetic field is generated by the excitation winding mounted on the stator magnetic pole to generate suction force to the rotor. , drive the rotor to rotate. Because the rotor is not magnetic, it is passively acted by the stator magnetic field. Therefore, between the rotor and the rotor, only the tensile force can be generated without generating a repulsive force. Since it is a simple magnetic pulling force, there is only a large and small amount difference, and there is no positive or negative.
  • Switched reluctance motors reduce leakage flux by increasing the design speed and reducing the number of rotor teeth. They are only suitable for high speeds and limit their applications. From the electromagnetic field theory, it can be deduced that: the unit volume torque of the motor is proportional to the flux change and is inversely proportional to the motor step angle under other conditions. Due to the magnetic flux leakage, after the number of rotor teeth is larger than a certain number, the magnetic flux leakage increases exponentially with the increase of the number of teeth of the rotor, so that the reduction of the amplitude of the magnetic flux is equivalent to the reduction of the step angle, and the output torque cannot follow the number of teeth. Increase and increase.
  • the main magnetic circuit bias magnet reluctance motor works on the stator to strip the DC component of the drive current, effectively reducing the apparent drive power, reducing the cost of the drive circuit and making it compatible with other motor drive circuits. Harmonic and pulse components create a favorable condition for the wide application of reluctance motors.
  • the bias magnetic reluctance motor can be further divided into: a star-corner connection bias magnet reluctance motor, a pole-coupled reverse-bias reluctance motor, and an external magnetic circuit bias magnet Reluctance motors, (also referred to as) permanent magnet bias magnet reluctance motors.
  • the magnetic flux leakage problem still exists and has not improved.
  • the magnetic flux leakage can also be used. If the magnetic flux leakage direction and the magnitude are controllable, as the motor: It is desirable to have a large negative magnetic flux leakage at the start, which causes the magnetic flux variation to multiply, the back electromotive force is large, and the output torque is large.
  • An object of the present invention is to provide a method of embedding a permanent magnet in a tooth gap of a reluctance motor to change a magnetic flux leakage amount and a solution for providing a cogging magnetic reluctance motor.
  • a method for changing magnetic flux leakage of a reluctance motor characterized in that a magnetic pair polarity and a magnetic flux direction linear pair are always placed in a tooth groove of a unidirectional magnetic flux of a main magnetic circuit of the field winding.
  • Magnets permanent magnets can change the magnetic flux leakage between the stator and rotor teeth and between the slots.
  • the cogging magnetic reluctance motor designed according to the above method is composed of a stator with a field winding, a core rotor and a casing, and is characterized by a toothed magnetic pole always in the direction of the unidirectional excitation magnetic flux of the main magnetic circuit.
  • a permanent magnet magnet having a direction of magnetization polarity linearly corresponding to a direction of excitation of the main magnetic circuit is embedded in at least the local tooth groove.
  • the magnetizing polarity of the permanent magnet can be selected to be the same as or opposite to the direction of excitation of the main magnetic circuit, to increase the leakage flux or to reduce or even form a negative leakage flux. It is difficult to change the magnetization polarity of the permanent magnets in the cogging in the same magnetic group motor, but the magnetic flux leakage can be changed or adjusted by changing the direction and magnitude of the current through the independent bias (or excitation) winding.
  • the cogging permanent magnet can block the leakage flux from flowing through the slot, and when the slot After the reverse bias generated by the permanent magnet is greater than a certain amount, an inverse (negative) leakage flux can also be generated. Due to the special position of the permanent magnet: When the rotor teeth are in a relative position of the slot, the leakage flux is relatively large; when the teeth of the stator and rotor are opposite, the main magnetic flux flowing through is less side effect.
  • the reverse magnetic field of the cogging permanent magnet that is, the reverse magnetic bias energy of the cogging
  • the reverse magnetic bias energy of the cogging effectively increases the amount of magnetic flux change, and increases the torque density and power density of the motor.
  • the polarity of the permanent magnet of the Kyrgyzstan is the same as the direction of the excitation flux of the main magnetic circuit
  • the leakage flux can be increased, and the amount of change in the excitation flux of the main magnetic circuit in which the fixed rotation, the sub-tooth-tooth alignment, and the tooth-to-slot alignment are reduced is reduced.
  • the back electromotive force is reduced, which is equivalent to the weak magnetic state of the DC motor.
  • the method of the invention is unique, and the designed reluctance motor has a reasonable structure, and the permanent magnet is embedded in a part of the tooth groove to eliminate the magnetic flux leakage of the reluctance motor, thereby greatly improving the performance and the unit volume torque of the reluctance motor, and greatly increasing the Value for money.
  • Fig. 2 The magnetic cross-section magnetic profile of the pole-coupled reverse-biased reluctance motor
  • the permanent magnets are embedded in the slots and can be selectively embedded in the stator slots or in the rotor slots according to the specific type of the reluctance motor.
  • the permanent magnets are embedded in the slots of the stator poles, and the magnetic polarity is arranged opposite or identical to the field flux of the poles. This solution is applicable to all reluctance machine configurations.
  • the permanent magnets may also be embedded in the rotor slots, and the magnetic polarity alignment direction is opposite or the same as the field flux direction.
  • a reluctance motor that applies a bias between an axial split-impedance motor and at least one pair of stators (eg, a multi-pair stator external magnetic circuit bias magnetoresistive motor, a hybrid stepping motor, Inductive motor, etc.), during the rotation of the rotor of the above motor, the synthetic magnetic flux flowing through the stator and rotor air gaps is a one-way pulsating magnetic flux, and the permanent magnet is embedded in the rotor slot to generate The cogging is reverse biased to reduce the effect of magnetic flux leakage.
  • Embodiment 1 Star-corner connection bias magnetic reluctance motor plus cogging magnetic bias
  • the mechanical structure and magnetic pole distribution of the star-corner connected magneto-reluctance motor are exactly the same as those of the conventional reluctance motor, including the stator 1, the core rotor 2 and the casing 3 with the field winding, and the excitation winding is omitted in the figure. (All the following figures are also omitted), the rotor 2 is not magnetic, and a magnetic field is generated by the excitation windings mounted on the magnetic poles 11 of the stator 1 to generate suction force to the rotor 2, thereby driving the rotor to rotate, and therefore, each adjacent The polarities of the magnetic poles 11 are different.
  • the permanent magnets 4 can be placed into the stator slots 12, and the permanent magnets 4 placed adjacent to the poles have the same polarity, as shown in FIG. .
  • a typical three-phase two-pole bias magnet reluctance motor is used to change the direction of the stator excitation current.
  • This example can be changed into a cogging forward bias magnet.
  • the cogging can be used to obtain a large torque at the low speed start; when the high speed is running, the positive partial touch operation is adopted to achieve the weak magnetic speed regulation effect and improve the high speed performance.
  • This principle applies to each of the examples except the following Example 6.
  • the same scheme is also applicable to a common reluctance motor, a switched reluctance motor, and a bias magnet reluctance motor.
  • Embodiment 2 Polar coupling reverse bias magnetic reluctance motor plus cogging reverse bias
  • the two-phase four-pole pole-coupled reverse-biased reluctance motor is shown, and several bias windings of the same polarity are unified and concentrated into a pair of windings to form a pair of upper and lower bias polarities.
  • the permanent magnet 4 placed in the slot 12 opposite in polarity to the main magnetic circuit only the permanent magnet can be placed in the stator, and the polarity is as shown.
  • this example only needs to change the direction of the excitation current and the current of the bias winding. It can adjust the electric potential of the generator to be large and small, and adjust the voltage to overcome the defect that the permanent magnet motor cannot adjust the excitation.
  • This principle is also applicable to Example 1 - Example 5.
  • the structure of the hybrid stepping motor is reversed, and the rotor teeth and the cogging are reversely biased.
  • the pole teeth on the other rotor just fall on the projection of the previous slot and are staggered.
  • the polarity of the magnetic field generated by the excitation winding of the previous stage stator is exactly opposite to that of the latter stage. Therefore, the permanent magnet 4 can be mounted in the slot 12 of the stator 1 or the rotor 2, and the permanent magnet 4 pole mounted in the previous section of the slot 12 Sex is the opposite of the latter.
  • the permanent magnets 4 placed in the slots 12 are all of the same polarity and can be either placed in the stator or placed in the rotor.
  • Embodiment 4 External magnetic circuit bias magnetic reluctance motor plus cogging reverse bias
  • the external magnetic circuit bias magnetoresistive motor has various structures, and only one of the cup rotor structures is shown.
  • the original magnetic circuit of the external magnetic circuit used in this example is biased by a permanent magnet, it can be changed to excitation biasing, and the cogging is reversed, which produces better results.
  • the power density is high and the manufacturing process is not too difficult.
  • It can be used in electric and electric hybrid electric vehicles for electric and power generation motors. During operation, the current direction and magnitude of the main circuit bias winding are randomly changed. Good running.
  • the permanent magnets in the stator slots in the figure can also be changed into the rotor slots.
  • Embodiment 5 Large step angle induction sub-motor plus cogging reverse bias
  • the induction sub-motor is actually a hybrid stepping motor with a large step angle.
  • the number of teeth on each pole of the stator 1 has been reduced to one tooth, a suitable tooth increase can be used to place the permanent magnet, but because of each segment The rotor 2 air gap main flux direction is single, so the permanent magnet 4 can be placed in the rotor slot 12.
  • a permanent magnet is present in the stator of the interdigital permanent magnet bias reluctance motor, and is mainly referred to as a permanent magnet 5 for convenience of expression.
  • the thickness of the cogging reverse bias permanent magnet 4 installed in the slot 12 should be thicker than that of the main permanent magnet, and the coercive force is higher. high.
  • the reverse magnetic flux of the cogging permanent magnet 4 of the A magnetic pole 11 is bypassed by the teeth on the C phase and the B phase magnetic pole 11 and flows back through the outer rotor 2; the cogging permanent magnet of the magnetic pole 11 4 Reverse magnetic flux, through the rotor 2, the air gap is bypassed by the teeth on the b and d poles.
  • the cogging permanent magnet 4 has a strong magnetomotive force, but is bypassed by the teeth on the other magnetic poles, the remaining reverse magnetic pressure drop is insufficient to positively bias the positive pole of the stator 1 magnetic pole.
  • the magnet 5 is demagnetized. This principle is also applicable to hybrid (inductive) permanent magnet motors and external magnetic permanent magnet motors and permanent magnet doubly salient switched reluctance motors.
  • Embodiment 7 Simple cogging magnetic reluctance motor
  • Conventional reluctance motors are generally driven by pulsating DC, and the bipolar motor and hybrid stepping motor are driven by AC.
  • the driving method is basically the same as that of synchronous motor and asynchronous motor.
  • the conventional reluctance motor can also be driven by AC, which is the same as other biasing motors and hybrid motors.
  • Figure 7 shows one of the typical motor configurations.
  • the drive windings can be driven by DC pulses or AC.
  • Embodiment 8 Simple cogging magnetic reluctance motor II
  • Figure 8 shows the motor consisting of an inner rotor two-phase reluctance motor with a toothed permanent magnet.
  • the cogging permanent magnets are all of the same polarity, and can be placed into the stator cogging or the rotor cogging. It can also be driven by either a DC pulse or an AC.
  • Figure 8 differs from Figure 7 in that: Similarly, the tooth difference of Figure 7 is equal to the number of poles per phase; Figure 8 shows the tooth difference equal to the number of pole pairs per phase. The symmetry of the phase magnetic circuit of Figure 8 is better than that of Figure 7.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

L'invention concerne un procédé de changement du courant de fuite d'un moteur à réluctance et un moteur à réluctance du type à polarisation magnétique et à indentations. Le procédé et le moteur de l'invention sont caractérisés en ce qu'un aimant permanent est disposé dans une indentation de stators ou de rotors se trouvant en permanence dans un circuit magnétique principal, dont la polarité correspond à la direction du courant. L'aimant permanent peut changer le courant de fuite entre les indentations des stators et des rotors. La polarité de l'aimant permanent dans l'indentation peut être sélectivement identique ou opposée à la direction du courant du circuit magnétique principal afin d'augmenter le courant de fuite ou de réduire le courant de direction inverse. De cette manière, le champ magnétique direct ou inverse, produit par l'aimant de polarisation, peut faire augmenter ou réduire la variation de courant de manière efficace.
PCT/CN2005/002081 2004-12-03 2005-12-02 Procede de changement du courant de fuite d'un moteur a reluctance et moteur a reluctance du type a polarisation magnetique et a indentations WO2006058505A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200410061296 CN1783670A (zh) 2004-12-03 2004-12-03 改变磁阻电机漏磁的方法及其齿槽偏磁式磁阻电机
CN200410061296.4 2004-12-03

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WO2006058505A1 true WO2006058505A1 (fr) 2006-06-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2468696A (en) * 2009-03-18 2010-09-22 Imra Europ S A S Uk Res Ct A stator assembly incorporating permanent magnets for an inductor machine.
GB2475811A (en) * 2009-03-18 2011-06-01 Imra Europe Sas A stator assembly incorporating permanent magnets for an inductor machine
CN112910114A (zh) * 2021-01-25 2021-06-04 上海电力大学 一种四相16/18极混合励磁容错磁阻发电机
EP4142126A4 (fr) * 2020-04-24 2024-05-08 Oriental Motor Co., Ltd. Moteur sans balais

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101431284B (zh) * 2008-12-22 2011-01-12 哈尔滨工业大学 混合式开关磁阻电机
JP2011139617A (ja) * 2010-01-04 2011-07-14 Hitachi Ltd 回転電機
CN104362822B (zh) * 2014-10-24 2017-02-22 东南大学 自弱磁复合磁通切换永磁电机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1458733A (zh) * 2003-06-12 2003-11-26 哈尔滨工业大学 直接驱动混合式磁阻电机
CN1484362A (zh) * 2003-06-30 2004-03-24 哈尔滨工业大学 直接驱动永磁式磁阻电机
CN1560987A (zh) * 2004-02-23 2005-01-05 哈尔滨工业大学 混合励磁开关磁阻电机

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1458733A (zh) * 2003-06-12 2003-11-26 哈尔滨工业大学 直接驱动混合式磁阻电机
CN1484362A (zh) * 2003-06-30 2004-03-24 哈尔滨工业大学 直接驱动永磁式磁阻电机
CN1560987A (zh) * 2004-02-23 2005-01-05 哈尔滨工业大学 混合励磁开关磁阻电机

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2468696A (en) * 2009-03-18 2010-09-22 Imra Europ S A S Uk Res Ct A stator assembly incorporating permanent magnets for an inductor machine.
GB2475811A (en) * 2009-03-18 2011-06-01 Imra Europe Sas A stator assembly incorporating permanent magnets for an inductor machine
GB2468696B (en) * 2009-03-18 2011-08-10 Imra Europ S A S Uk Res Ct An electrical machine
GB2475811B (en) * 2009-03-18 2012-02-01 Imra Europe Sas An electrical machine
EP4142126A4 (fr) * 2020-04-24 2024-05-08 Oriental Motor Co., Ltd. Moteur sans balais
CN112910114A (zh) * 2021-01-25 2021-06-04 上海电力大学 一种四相16/18极混合励磁容错磁阻发电机

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