WO2023168552A1 - Moteur électrique à vitesses multiples à courant continu avec stator à deux phases et rotor à six pôles - Google Patents

Moteur électrique à vitesses multiples à courant continu avec stator à deux phases et rotor à six pôles Download PDF

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Publication number
WO2023168552A1
WO2023168552A1 PCT/CN2022/079506 CN2022079506W WO2023168552A1 WO 2023168552 A1 WO2023168552 A1 WO 2023168552A1 CN 2022079506 W CN2022079506 W CN 2022079506W WO 2023168552 A1 WO2023168552 A1 WO 2023168552A1
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Prior art keywords
pole
tooth
yoke
phase
winding
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PCT/CN2022/079506
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English (en)
Chinese (zh)
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罗灿
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罗灿
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Priority to PCT/CN2022/079506 priority Critical patent/WO2023168552A1/fr
Publication of WO2023168552A1 publication Critical patent/WO2023168552A1/fr

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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
    • H02P8/00—Arrangements for controlling dynamo-electric motors rotating step by step
    • H02P8/22—Control of step size; Intermediate stepping, e.g. microstepping
    • 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
    • H02K1/14—Stator cores with salient poles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the invention relates to a brushless DC motor.
  • the stator uses a two-phase armature winding, and passes in two-phase direct current according to the two-phase six-pole method to form changing magnetic poles with various step distances and stator magnetic fields at various speeds to drive the six-pole rotor.
  • This is a two-phase stator, six-pole rotor DC multi-speed motor.
  • the motor is composed of stator, rotor, supporting parts, casing and control mechanism.
  • the motor generally has a cylindrical rotor located inside the center of the motor and an annular stator located outside surrounding the rotor. This is an inner-rotor radial flux motor.
  • Topology technology can realize that the cylindrical stator is located inside the center of the motor and the annular rotor is located outside surrounding the stator. This is an outer rotor radial flux motor.
  • Topology technology can also realize an axial flux motor in which the disc-shaped stator is located on one side of the motor, the disc-shaped rotor is located on the other side of the motor, and the stator and the rotor are axially opposite.
  • Topology technology can also realize linear motors in which linear stators and linear rotors move relatively parallel.
  • the topology technology is a mature technology. Motors strive to increase functions and simplify structures.
  • Traditional brushless DC motors use no less than three-phase armature windings, have only one rated speed, and are not rich in functions.
  • the latest brushless DC motor is a motor composed of "yoke winding multi-pole multi-speed DC stator" or “tooth winding multi-pole multi-speed DC stator”, which can achieve multi-speed rated speed, but both use three-phase and more-phase armatures Winding, complex structure.
  • the invention proposes: 1. Use a two-phase armature winding; 2.
  • the two-phase direct current is a direct current in which the current and potential of each phase is stable in each step time.
  • the direct current includes positive and negative currents.
  • the positive and negative currents have equal amplitudes. They are usually rectangular currents and form a trapezoidal air gap magnetic flux.
  • DC power managed by electronic controllers and DC power generated by inverters are all mature technologies. Mature technologies are used to control two-phase DC, such as ladder control, current control, torque control, optimal efficiency control, leading phase angle control, position sensorless control, etc.
  • the two-phase stator, six-pole rotor DC multi-speed motor proposed by the present invention is specifically a DC brushless motor that uses a two-phase armature winding, feeds two-phase DC power according to the two-phase six-pole method, and has a stator magnetic field with two speeds.
  • the motor structure is simplified while increasing the motor function.
  • the motor industry requires two-phase stator, six-pole rotor DC multi-speed motors.
  • the two-phase stator, six-pole rotor DC multi-speed motor of the present invention is composed of a stator, a rotor, a supporting component, a casing, a control mechanism and other components.
  • the characteristics are: using a two-phase armature winding, passing in two-phase direct current according to the two-phase six-pole method, forming changing magnetic poles with various step distances, forming stator magnetic fields at various speeds, and driving the six-pole rotor.
  • the stator consists of stator core and armature winding.
  • the stator core adopts mature technology and is made of high magnetic flux materials. For example, it is made of silicon steel, laminated silicon steel, etc.
  • the stator core is set as needed, so that each tooth portion is evenly arranged in the circumferential direction and faces the rotor inward.
  • the yoke portion is parallel to the direction of motion of the rotor and is annular.
  • the yoke portion connects each tooth portion to form the stator core.
  • the number of phases of the stator armature winding is 2, and the stator core has 2*Q teeth and 2*Q yoke sections; Q is the number of pole pairs of the stator magnetic field, which is a natural number.
  • the teeth of the stator core are also called stator poles.
  • the number of stator poles is equal to the number of teeth of the stator core.
  • the clockwise direction of the stator core is the forward direction, and the counterclockwise direction is the rearward direction.
  • the armature winding is a wire structure that passes two-phase direct current to form changing magnetic poles with various step distances and forms stator magnetic fields at various speeds, including two-phase armature windings.
  • Armature windings come in two forms, one of which is used. The first form is that the armature winding uses a yoke winding, and each phase armature winding uses wires wound around the yoke of the stator core to form a yoke winding, which is arranged in sections according to phase sequence numbers along the yoke.
  • the yoke winding setting rule is: select a tooth on the stator core as the base, set a two-phase two-section positive yoke winding on each section of the yoke in sequence in front of the base according to the phase sequence number, and then set it in sequence There are two-phase two-section negative yoke windings, and a total of two-phase four-section yoke windings are provided.
  • the wires and number of turns of the yoke windings in each section are the same.
  • the connection methods between the yoke windings of each section in each phase including series connection and parallel connection, adopt mature technology.
  • the positive and negative of each section of the yoke winding is determined according to the yoke orientation method.
  • the yoke orientation method is: select a stator core cross-section parallel to the direction of rotor movement, and assume that the clockwise direction in the cross-sectional view is the positive direction of the yoke magnetic flux. That is, when the direction of the N end of the yoke magnetic flux is clockwise, the magnetic flux of this segment of the yoke is a positive yoke flux; when the direction of the N end of the yoke magnetic flux is counterclockwise, the magnetic flux of this segment of the yoke is a negative yoke.
  • the yoke winding that forms a positive yoke magnetic flux when a positive current is passed is a positive yoke winding
  • the yoke winding that forms a negative yoke magnetic flux when a positive current is passed is a negative yoke.
  • the yoke winding that forms a positive yoke magnetic flux when a negative current is passed is a negative yoke winding
  • the yoke winding that forms a negative yoke magnetic flux when a negative current is passed is a positive yoke winding.
  • the magnetic flux has a head N end and a tail S end.
  • the method of gathering magnetic fluxes at the yoke to form magnetic poles is: different groups of magnetic fluxes at the yoke in different directions gather with each other, that is, N-ends gather with N-ends, and S-ends gather with S-ends.
  • the teeth closest to the N end of the yoke form the N pole
  • the teeth closest to the S end of the yoke form the S pole.
  • the changing magnetic poles form a changing stator magnetic field.
  • the N pole is the North Pole
  • the S pole is the South Pole
  • * is the multiplication sign
  • / is the division sign
  • + is the positive sign or plus sign
  • - is the negative sign or minus sign.
  • the phase sequence number of each armature winding is a mature technology and is usually expressed in lowercase English alphabetical order; in the present invention, it is a and b.
  • the second form is that the armature winding uses tooth windings.
  • Each phase armature winding uses wires wound around the teeth of the stator core to form tooth windings, which are arranged in sequence according to the phase number.
  • the tooth winding setting rule is: select one tooth on the stator core as the base, start from the base and set two phases and two spur tooth windings on each tooth in sequence according to the phase sequence number, and then set the two phases in sequence.
  • the wires and number of turns of each tooth winding are the same.
  • the connection methods between the individual tooth windings in each phase including series connection and parallel connection, adopt mature technology.
  • the positive and negative of each tooth winding is determined according to the tooth orientation method.
  • the tooth orientation method is: the tooth winding that forms the N pole when a positive current flows is a positive tooth winding, and the tooth winding that forms an S pole when a positive current flows is negative. Tooth winding. There are three states when DC current is supplied to each tooth winding. One is that the positive tooth winding is supplied with positive current or the negative tooth winding is supplied with negative current, forming an N pole; the other is that the positive tooth winding is supplied with negative current or the negative tooth winding is supplied with negative current. Positive current forms the S pole; third, the tooth winding does not pass current and does not form a magnetic pole. As the DC current changes each step, the magnetic pole changes to form a changing stator magnetic field.
  • the armature winding is fed with two-phase DC power according to the two-phase six-pole method.
  • Each power-on cycle includes 4 steps, with a total of 4 equal step times.
  • the current passed in each step is related to the relative position of the stator and rotor.
  • Mature technologies are used to select the start and end timing of each step, select the DC conduction and closing time, and select the electrical phase angle.
  • Mature technology includes setting up sensors in the motor to obtain each step position signal, and the signal is provided to the electronic controller to control the current supplied to each phase armature winding by the multi-phase inverter.
  • the current is passed through each step to make the rotor rotate a step distance, and then the current is passed through in the next step.
  • the two-phase six-pole method includes the yoke No. 1 forward method, the yoke No. 1 inverse method, the yoke No. 2 method, the tooth No. 1 forward method, the tooth No. 1 inverse method and the tooth No. 2 method.
  • the yoke No. 1 forward method, the yoke No. 1 inverse method and the yoke No. 2 method are suitable for the yoke winding
  • the tooth No. 1 forward method, tooth No. 1 inverse method and tooth No. 2 method are suitable for the tooth winding.
  • the sequence of yoke No. 1 is: Step 1, take the base as the S pole at this step, take the second tooth in front of the base as the N pole at this step, pass in direct current, the current rule is that the current makes the 2 sections of the yoke in front of the S pole The windings all form positive yoke magnetic flux, and the current causes the two sections of yoke windings in front of the N pole to form negative yoke magnetic flux; in each subsequent step (until step 4), the first tooth in front of the S pole in the previous step is used as the In this step, the S pole uses the first tooth in front of the N pole in the previous step as the N pole in this step. Direct current is supplied, and the current rules remain unchanged.
  • Step 5 is the same as step 1, and the next energization cycle begins.
  • the stator magnetic field of each step is The advance distance is one polar center distance forward.
  • the inverse method of yoke No. 1 is: the first step is the same as the first step of the method of yoke No. 1; in each subsequent step (until step 4), the first tooth behind the S pole of the previous step is used as the S pole of this step, and the N pole of the previous step is The first tooth at the rear is used as the N pole in this step, and DC current is passed through, and the current rules remain unchanged.
  • Step 5 is the same as step 1, starting the next energization cycle; each step of the stator magnetic field is one pole center distance backward.
  • the first step is the same as the first step of the Yoke No. 1 method; in the second step, the second tooth in front of the S pole in the previous step is used as the S pole of this step, and the second tooth in front of the N pole in the previous step is used as the S pole.
  • the N pole is supplied with direct current, and the current rules remain unchanged; step 3 is the same as step 1; step 4 is the same as step 2; step 5 is the same as step 1, starting the next energization cycle; its alternating stator magnetic field changes every One step is equivalent to a step distance of two pole centers forward. This is the alternating stator magnetic field formed by the base and the second tooth in front of the base.
  • the first step is the same as the yoke No. 1 method and the second step; in the second step, the second tooth in front of the S pole of the previous step is used as the S pole of this step, and the N pole of the previous step is The second tooth in front of the pole is used as the N pole in this step, and DC current is passed through.
  • each step of its alternating stator magnetic field is equivalent to a step distance of two forward pole-center distances.
  • the alternating stator magnetic field is a stator magnetic field in which a pair of magnetic poles whose distance between magnetic poles is two pole-center distances alternately change.
  • the current causes a certain segment of the yoke winding to form a negative yoke magnetic flux.
  • the yoke winding of this segment is a positive yoke winding, it causes a negative current to flow through it.
  • the yoke winding of this segment is a negative yoke winding, it causes it to flow negative current. Make it pass positive current.
  • the current causes a certain section of the yoke winding to form a positive yoke magnetic flux.
  • the yoke winding of this section is a positive yoke winding, it causes a positive current to flow through it.
  • the yoke winding of this section is a negative yoke winding, it causes it to pass through positive current. Make it pass negative current.
  • Step 1 take the base as the N pole of this step, take the second tooth in front of the base as the S pole of this step, pass in direct current, the current rule is that the current makes the S pole tooth winding form a negative At the same time, the current flows to the tooth magnetic flux so that the N pole tooth winding forms a forward tooth magnetic flux; in each subsequent step (until step 4), the first tooth in front of the S pole in the previous step is used as the S pole in this step, and the N pole in the previous step The first tooth in front of the pole is used as the N pole in this step, and DC current is passed through, and the current rules remain unchanged; step 5 is the same as step 1, starting the next energization cycle; each step of the stator magnetic field is one pole center distance forward .
  • Step 1 is the same as step 1 of tooth No. 1; in each subsequent step (until step 4), the first tooth behind the S pole of the previous step is used as the S pole of this step, and the N pole of the previous step is The first tooth at the rear is used as the N pole in this step, and DC current is passed through, and the current rules remain unchanged.
  • Step 5 is the same as step 1, starting the next energization cycle; each step of the stator magnetic field is one pole center distance backward.
  • the tooth No. 2 method is: the first step is the same as the tooth No.
  • step 1 in the second step, the second tooth in front of the S pole in the previous step is used as the S pole of this step, and the second tooth in front of the N pole in the previous step is used as the S pole.
  • the N pole is supplied with direct current, and the current rules remain unchanged;
  • step 3 is the same as step 1;
  • step 4 is the same as step 2;
  • step 5 is the same as step 1, starting the next energization cycle;
  • its alternating stator magnetic field changes every One step is equivalent to a step distance of two pole centers forward. This is the alternating stator magnetic field formed by the base and the second tooth in front of the base.
  • each step of its alternating stator magnetic field is equivalent to a step distance of two forward pole-center distances. This is the alternating magnetic field formed by the first tooth in front of the base and the third tooth in front of the base. The current causes a certain tooth winding to form a negative tooth magnetic flux.
  • each step of the two-phase six-pole method is to make each armature winding form a changing magnetic pole with a correct step distance through a specific current.
  • each step of No. 1 forward method makes the stator magnetic field rotate clockwise by 1 pole center distance.
  • Each step of No. 1 reverse method makes the stator magnetic field rotate counterclockwise by 1 pole center distance.
  • Each step of No. 2 method makes the stator magnetic field rotate counterclockwise by 1 pole center distance.
  • the variable stator magnetic field moves 2 pole-center distances.
  • the pole center distance is the arc between the top centers of two adjacent stator teeth.
  • the rotor rotates The direction is opposite to the rotation direction of the stator magnetic field; choosing one of the No. 2 methods can form an alternating stator magnetic field, which can make the already rotating rotor continue to rotate in the original rotation direction at a speed of 60 degrees per step.
  • the two-stage yoke windings (or two tooth windings) of any phase armature winding are changed to two-stage yoke windings (or two tooth windings) with opposite directions.
  • Two tooth windings in each step of each energizing method of the two-phase six-pole method, if the original direct current fed into the phase is correspondingly changed to a direct current in the opposite direction, then the present invention remains unchanged.
  • the two-phase stator six-pole rotor DC motor can also flow two-phase alternating current under the condition that the performance of the control mechanism is satisfied.
  • a-phase armature winding flows +A-phase alternating current and the b-phase armature winding flows +B-phase alternating current
  • a clockwise rotating stator magnetic field is formed.
  • a counterclockwise rotating stator magnetic field is formed. The rotating stator magnetic field can start and run the rotor.
  • the rotation direction of the rotor is opposite to the rotation direction of the stator magnetic field, and the rotor speed is one-third of the stator magnetic field speed.
  • the a-phase armature winding using the yoke winding flows +A-phase alternating current
  • the b-phase armature winding flows +A-phase alternating current
  • the a-phase armature winding using the tooth winding flows +A-phase alternating current
  • the b-phase armature winding flows -A-phase alternating current, or when the b-phase armature winding using the tooth winding flows +A-phase alternating current, at the base
  • the first tooth in front and the third tooth in front of the base form an alternating stator magnetic field.
  • the alternating stator magnetic field can make the already rotating rotor run in the original direction of rotation.
  • the speed of the rotating stator magnetic field and the alternating stator magnetic field is determined by the frequency of the alternating current.
  • the two-phase alternating current is a two-phase current in which the current and potential of each phase changes in a sinusoidal distribution over time, including sinusoidal alternating current, nearly sinusoidal alternating current, simulated sinusoidal alternating current generated by an inverter, etc., all of which are mature technologies.
  • the +A phase alternating current phase is 90 degrees ahead of the +B phase alternating current phase.
  • the phase of the +A phase alternating current and the -A phase alternating current are staggered by 180 degrees.
  • Each embodiment of the present invention describes a motor with a pair of pole-pair stators.
  • the invention also includes a motor with multiple pole-pair stators. It is mature in the industry to derive a multi-pole-pair stator motor from a pair of pole-pair stator motors. technology.
  • Each embodiment of the present invention describes a motor with a stator matched to a rotor.
  • the invention also includes a motor with double stators matched with a rotor, and a motor with double rotors matched with a stator. It is deduced that double stator motors and double rotor motors are the most popular ones in the industry. Mature technology.
  • the rotor adopts a six-pole rotor, including a three-pole pair permanent magnet rotor and a three-pole pair excitation rotor, one of which is used; six magnetic poles form three pairs of magnetic poles, also known as three pole pairs.
  • the permanent magnet rotor uses permanent magnets to form magnetic poles
  • the excitation rotor uses excitation windings to flow excitation current to form magnetic poles. Both are mature technologies.
  • the control mechanism is composed of a sensor, an electronic controller and a two-phase inverter. The control mechanism is connected to the circuit of the two-phase stator and controls the selection of the method for passing direct current into the two-phase armature winding.
  • the rotor, supporting components, casing and control mechanism adopt mature technology.
  • Figures 1 to 3 are cross-sectional views of a two-phase stator, six-pole rotor DC multi-speed motor with a number of pole pairs.
  • the armature winding uses a yoke winding.
  • Figure 1 shows the first step of the yoke No. 1 forward method, the yoke No. 1 inverse method, and the yoke No. 2 method.
  • Figure 2 shows the second step of the forward method for yoke No. 1 and the fourth step of the reverse method for yoke No. 1.
  • Figure 3 shows step 3 of the forward method with yoke No. 1, step 3 of the reverse method with yoke No. 1, and step 2 of the method with yoke No. 2.
  • Figures 4 to 6 are cross-sectional views of a two-phase stator, six-pole rotor DC multi-speed motor with a number of pole pairs, and the armature winding uses tooth windings.
  • Figure 4 shows the first step of tooth No. 1 forward method, tooth No. 1 reverse method, and tooth No. 2 method.
  • Figure 5 shows the second step of the forward method for tooth No. 1 and the fourth step of the reverse method for tooth No. 1.
  • Figure 6 shows the third step of the forward method for tooth No. 1, the third step of the reverse method for tooth No. 1, and the second step of the tooth No. 2 method.
  • the armature winding uses three or more phases.
  • the control mechanisms for controlling three-phase and multi-phase, including sensors, electronic controllers and inverters, are very complex. There is only one step distance, and the motor has only one step distance. rated speed.
  • the latest brushless DC motor is a motor composed of "yoke winding multi-pole multi-speed DC stator" or “tooth winding multi-pole multi-speed DC stator", which can achieve multi-speed rated speed, but both use three-phase and more-phase armatures Winding, complex structure.
  • the two-phase stator and six-pole rotor DC multi-speed motor uses two-phase armature windings, which simplifies the stator structure.
  • the control mechanism for controlling the two phases including sensors, electronic controllers and inverters, is very simple; the DC power is fed into the two-phase six-pole motor.
  • the pole method can have a variety of step distances, and the motor has a variety of rated speeds, which simplifies the motor structure while increasing the motor function. There was no identical motor before this.
  • stator core high flux material
  • yoke teeth, poles, magnetic poles, aggregation, rotating stator magnetic field, alternating stator magnetic field and number of pole pairs
  • wires, windings, windings, armature windings, yoke windings, tooth windings, connections, step lengths, pole center distances and arcs are all mature technologies.
  • Figure 1 is one of the cross-sections of a two-phase stator and six-pole rotor DC multi-speed motor with a number of pole pairs, and is one of the schematic diagrams of Embodiment 1.
  • 1 is the stator core yoke
  • 2 is the yoke winding, which has four sections (+a, +b, -a and -b)
  • 3 is the stator core teeth
  • 4 is the permanent magnet rotor core
  • 5 is a permanent magnet with six poles.
  • Figure 2 is the second section of a two-phase stator, six-pole rotor DC multi-speed motor with a pair of pole pairs, and is the second schematic diagram of Embodiment 1.
  • 1 is the stator core yoke
  • 2 is the yoke winding, which has four sections (+a, +b, -a and -b)
  • 3 is the stator core teeth
  • 4 is the permanent magnet rotor core
  • 5 is a permanent magnet with six poles.
  • Figure 3 is the third section of a two-phase stator, six-pole rotor DC multi-speed motor with a pair of pole pairs, and is the third schematic diagram of Embodiment 1.
  • 1 is the stator core yoke
  • 2 is the yoke winding, which has four sections (+a, +b, -a and -b)
  • 3 is the stator core teeth
  • 4 is the permanent magnet rotor core
  • 5 is a permanent magnet with six poles.
  • Figure 4 is the fourth cross-section of a two-phase stator, six-pole rotor DC multi-speed motor with a pole pair number, and is one of the schematic diagrams of Embodiment 2.
  • 1 is the stator core yoke
  • 2 is the tooth winding
  • 3 is the stator core tooth
  • 4 is the permanent magnet rotor core
  • 5 is a permanent magnet with six poles.
  • Figure 5 is the fifth section of a two-phase stator, six-pole rotor DC multi-speed motor with a pair of pole pairs, and is the second schematic diagram of Embodiment 2.
  • 1 is the stator core yoke
  • 2 is the tooth winding
  • 3 is the stator core tooth
  • 4 is the permanent magnet rotor core
  • 5 is a permanent magnet with six poles.
  • Figure 6 is the sixth section of a two-phase stator, six-pole rotor DC multi-speed motor with a pair of pole pairs, and is the third schematic diagram of the second embodiment.
  • 1 is the stator core yoke
  • 2 is the tooth winding
  • 3 is the stator core tooth
  • 4 is the permanent magnet rotor core
  • 5 is a permanent magnet with six poles.
  • each armature winding is represented by a small number of turns of wires, and the actual number of turns of wires is set according to actual needs.
  • the braces mark the phase number of each yoke winding, and the phase number of the tooth winding is marked in the tooth.
  • the supporting parts, casing and control mechanism are not shown.
  • the direction of the magnetic flux in the yoke formed at a certain step of the two-phase six-pole method is as shown by the arrow drawn in the yoke, and the magnetic poles formed by the magnetic flux in the tooth are shown as S and N in the tooth in the figure.
  • the direction of the N pole of the rotor permanent magnet is as shown by the arrow drawn in the permanent magnet.
  • the rotor position in Figures 3, 4 and 5 can be ignored. Each component only shows the relationship between each other and does not reflect the actual size.
  • Embodiment 1 A two-phase stator, six-pole rotor DC multi-speed motor with a pair of pole pairs is composed of a stator, a rotor, a supporting component, a casing, a control mechanism and other components.
  • the stator armature winding adopts yoke winding.
  • the stator consists of stator core and armature winding.
  • the stator core is manufactured from laminated silicon steel using proven technology.
  • the stator core is set as needed so that the four teeth are evenly arranged in the circumferential direction toward the rotor.
  • the yoke is parallel to the direction of motion of the rotor and is annular. The four-section yoke connects the four teeth to form the stator core.
  • the armature winding adopts a yoke winding, and wires are wound around the yoke of the stator core to form a yoke winding, which is arranged in sections according to phase sequence numbers along the yoke.
  • the yoke winding setting rule is: select a tooth on the stator core as the base, and set the two-phase two-section positive yoke winding in front of the base according to the phase sequence number (a and b), that is, +a yoke
  • the negative yoke winding and the +b yoke winding are then successively set up with the two-phase two-section negative yoke winding, that is, the -a yoke winding and the -b yoke winding, and a total of two-phase four-section yoke windings are set up.
  • the two yoke windings in each phase are connected in series.
  • the positive and negative of each section of the yoke winding is determined according to the yoke orientation method.
  • the yoke orientation method is: select a stator core cross-section parallel to the direction of rotor movement, and assume that the clockwise direction in the cross-sectional view is the positive direction of the yoke magnetic flux. That is, when the direction of the N end of the yoke magnetic flux is clockwise, the magnetic flux of this segment of the yoke is a positive yoke flux; when the direction of the N end of the yoke magnetic flux is counterclockwise, the magnetic flux of this segment of the yoke is a negative yoke.
  • the yoke winding that forms a positive yoke magnetic flux when a positive current is passed is a positive yoke winding
  • the yoke winding that forms a negative yoke magnetic flux when a positive current is passed is a negative yoke.
  • the yoke winding that forms a positive yoke magnetic flux when a negative current is passed is a negative yoke winding
  • the yoke winding that forms a negative yoke magnetic flux when a negative current is passed is a positive yoke winding.
  • the magnetic flux has a head N end and a tail S end.
  • the method of gathering magnetic fluxes at the yoke to form magnetic poles is: different groups of magnetic fluxes at the yoke in different directions gather with each other, that is, N-ends gather with N-ends, and S-ends gather with S-ends.
  • the teeth closest to the N end of the yoke form the N pole, and the teeth closest to the S end of the yoke form the S pole.
  • the changing magnetic poles form a changing stator magnetic field.
  • the armature winding is fed with two-phase DC power according to the two-phase six-pole method.
  • Each power-on cycle includes 4 steps, with a total of 4 equal step times.
  • the two-phase six-pole method in this embodiment includes the yoke No. 1 forward method, the yoke No. 1 inverse method and the yoke No. 2 method. There are a total of three methods for passing two-phase direct current to form the stator magnetic field.
  • Step 1 take the base as the S pole at this step, take the second tooth in front of the base as the N pole at this step, pass in direct current
  • the current rule is that the current makes the 2 sections of the yoke in front of the S pole
  • the windings all form positive yoke magnetic flux, and the current causes the two sections of yoke windings in front of the N pole to form negative yoke magnetic flux; in each subsequent step (until step 4), the first tooth in front of the S pole in the previous step is used as the In this step, the S pole uses the first tooth in front of the N pole in the previous step as the N pole in this step. Direct current is supplied, and the current rules remain unchanged.
  • Step 5 is the same as step 1, and the next energization cycle begins.
  • the stator magnetic field of each step is The advance distance is one polar center distance forward.
  • the inverse method of yoke No. 1 is: the first step is the same as the first step of the method of yoke No. 1; in each subsequent step (until step 4), the first tooth behind the S pole of the previous step is used as the S pole of this step, and the N pole of the previous step is The first tooth at the rear is used as the N pole in this step, and DC current is passed through, and the current rules remain unchanged.
  • Step 5 is the same as step 1, starting the next energization cycle; each step of the stator magnetic field is one pole center distance backward.
  • the first step is the same as the first step of the Yoke No. 1 method; in the second step, the second tooth in front of the S pole in the previous step is used as the S pole of this step, and the second tooth in front of the N pole in the previous step is used as the S pole.
  • the N pole is supplied with direct current, and the current rules remain unchanged; step 3 is the same as step 1; step 4 is the same as step 2; step 5 is the same as step 1, starting the next energization cycle; its alternating stator magnetic field changes every One step is equivalent to a step distance of two pole centers forward. This is the alternating stator magnetic field formed by the base and the second tooth in front of the base.
  • Step 1 of the yoke No. 1 is that both the a-phase armature winding and the b-phase armature winding are supplied with positive current; the second step is that the b-phase armature winding is supplied with positive current, and the phase a armature winding is supplied with negative current. ; The third step is to pass negative current into both the a-phase armature winding and the b-phase armature winding; the fourth step is to pass positive current into the a-phase armature winding, and the negative current into the b-phase armature winding; the fifth step is the same as Step 1, start the next power cycle.
  • the inverse method of yoke No. 1 can be deduced in the same way. For another example, step 1 of the yoke No.
  • step 2 is the same as step 1 of the yoke No. 1 method; step 2 is to pass negative current to both the a-phase armature winding and b-phase armature winding; step 3 is the same as step 1; step 4 Synchronize with step 2; step 5 with step 1, start the next power cycle.
  • the control mechanism consists of sensors, electronic controllers and two-phase inverters.
  • the rotor adopts a six-pole rotor, and the permanent magnets form three pairs of poles, see Figure 1.
  • the permanent magnets of the rotor are close to each other. In reality, there are insulators separating the permanent magnets.
  • the rotor, supporting components, casing and control mechanism adopt mature technology.
  • Figure 1 shows the first step of the yoke No. 1 forward method, the yoke No. 1 inverse method, and the yoke No. 2 method.
  • Figure 2 shows the second step of the forward method for yoke No. 1 and the fourth step of the reverse method for yoke No. 1.
  • Figure 3 shows step 2 of the yoke No. 2 method, step 3 of the forward method of yoke No. 1, and step 3 of the reverse method of yoke No. 1.
  • the stator magnetic field rotates backward 90 degrees and the six-pole rotor rotates 30 degrees clockwise.
  • the control mechanism selects the yoke No. 2 method, at each step, the alternating stator magnetic field moves 180 degrees, and the six-pole rotor rotates 60 degrees in the original rotation direction.
  • the motor has two rated speeds with different absolute values. Obviously, choosing only one of the speeds becomes a single-speed rated speed motor.
  • Embodiment 2 A two-phase stator, six-pole rotor DC multi-speed motor with a pair of pole pairs is composed of a stator, a rotor, a supporting component, a casing, a control mechanism and other components.
  • the stator armature winding adopts tooth winding.
  • the stator consists of stator core and armature winding.
  • the stator core is manufactured from laminated silicon steel using proven technology.
  • the stator core is set as needed so that the four teeth are evenly arranged in the circumferential direction toward the rotor.
  • the yoke is parallel to the direction of motion of the rotor and is annular. The four-section yoke connects the four teeth to form the stator core.
  • the armature winding uses a tooth winding, and wires are wound around the teeth of the stator core to form a tooth winding, which is arranged in sequence according to the phase number.
  • the tooth winding setting rule is: select one tooth on the stator core as the base, and set two-phase and two spur tooth windings on each tooth in sequence starting from the base according to the phase sequence number (a and b). That is, +a tooth winding and +b tooth winding, and then two-phase two negative tooth windings are set in sequence, namely -a tooth winding and -b tooth winding, and a total of two-phase and four tooth windings are set.
  • the two tooth windings in each phase are connected in series.
  • the positive and negative of each tooth winding is determined according to the tooth orientation method.
  • the tooth orientation method is: the tooth winding that forms the N pole when a positive current flows is a positive tooth winding, and the tooth winding that forms an S pole when a positive current flows is negative. Tooth winding. There are three states when DC current is supplied to each tooth winding. One is that the positive tooth winding is supplied with positive current or the negative tooth winding is supplied with negative current, forming an N pole; the other is that the positive tooth winding is supplied with negative current or the negative tooth winding is supplied with negative current. Positive current forms the S pole; third, the tooth winding does not pass current and does not form a magnetic pole. As the DC current changes each step, the magnetic pole changes to form a changing stator magnetic field.
  • the armature winding is fed with two-phase DC power according to the two-phase six-pole method.
  • Each power-on cycle includes 4 steps, with a total of 4 equal step times.
  • the two-phase six-pole method in this embodiment includes the tooth No. 1 forward method, the tooth No. 1 reverse method, and the tooth No. 2 method. There are a total of three methods for passing two-phase direct current to form the stator magnetic field. The sequence of tooth No.
  • Step 1 take the base as the N pole of this step, take the second tooth in front of the base as the S pole of this step, pass in direct current, the current rule is that the current makes the S pole tooth winding form a negative At the same time, the current flows to the tooth magnetic flux so that the N pole tooth winding forms a forward tooth magnetic flux; in each subsequent step (until step 4), the first tooth in front of the S pole in the previous step is used as the S pole in this step, and the N pole in the previous step The first tooth in front of the pole is used as the N pole in this step, and DC current is passed through, and the current rules remain unchanged; step 5 is the same as step 1, starting the next energization cycle; each step of the stator magnetic field is one pole center distance forward .
  • Step 1 is the same as step 1 of tooth No. 1; in each subsequent step (until step 4), the first tooth behind the S pole of the previous step is used as the S pole of this step, and the N pole of the previous step is The first tooth at the rear is used as the N pole in this step, and DC current is passed through, and the current rules remain unchanged.
  • Step 5 is the same as step 1, starting the next energization cycle; each step of the stator magnetic field is one pole center distance backward.
  • the tooth No. 2 method is: the first step is the same as the tooth No.
  • step 1 in the second step, the second tooth in front of the S pole in the previous step is used as the S pole of this step, and the second tooth in front of the N pole in the previous step is used as the S pole.
  • the N pole is supplied with direct current, and the current rules remain unchanged;
  • step 3 is the same as step 1;
  • step 4 is the same as step 2;
  • step 5 is the same as step 1, starting the next energization cycle; its alternating stator magnetic field changes every One step is equivalent to a step distance of two pole centers forward. This is the alternating stator magnetic field formed by the base and the second tooth in front of the base.
  • step 1 is to pass positive current to the phase a armature winding; the second step is to pass the positive current to the phase b armature winding; the third step is to pass the negative current to the phase a armature winding; and the fourth step is to pass the positive current to the phase a armature winding.
  • the first step is to pass negative current into the b-phase armature winding; the fifth step is the same as the first step, starting the next energization cycle.
  • the inverse method of tooth No. 1 can be deduced in the same way.
  • step 1 of the tooth No. 2 method is the same as step 1 of the tooth No. 1 method; step 2 is to pass negative current to the phase a armature winding; step 3 is the same as step 1; step 4 is the same as step 2; Step 5 is the same as step 1 and starts the next power cycle.
  • the control mechanism consists of sensors, electronic controllers and two-phase inverters.
  • the rotor adopts a six-pole rotor, and the permanent magnets form three pairs of poles, see Figure 6.
  • the permanent magnets of the rotor are close to each other.
  • the rotor, supporting components, casing and control mechanism adopt mature technology.
  • Figure 4 shows the first step of tooth No. 1 forward method, tooth No. 1 reverse method, and tooth No. 2 method.
  • Figure 5 shows the second step of the forward method for tooth No. 1 and the fourth step of the reverse method for tooth No. 1.
  • Figure 6 shows the second step of the tooth No. 2 method, the third step of the tooth No. 1 forward method, and the third step of the tooth No. 1 reverse method.
  • the alternating stator magnetic field moves 180 degrees, and the six-pole rotor rotates 60 degrees in the original rotation direction.
  • the motor has two rated speeds with different absolute values. Obviously, choosing only one of the speeds becomes a single-speed rated speed motor.
  • indicators such as the stator's pole arc, tooth width, tooth height (extremely high), tooth shape, yoke thickness, wire diameter, number of turns, detailed properties of the rotor, and detailed properties of the control mechanism are not shown.
  • the optimized selection of these indicators adopts mature technology.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)

Abstract

La présente invention concerne un moteur électrique à vitesses multiples à courant continu avec un stator à deux phases et un rotor à six pôles, le moteur électrique à vitesses multiples à courant continu comprenant un stator, un rotor, un composant de support, un boîtier, un mécanisme de commande et d'autres composants, et étant caractérisé en ce que des enroulements d'induit à deux phases sont utilisés, un courant continu à deux phases est introduit à l'aide d'un procédé à deux phases à six pôles, des pôles magnétiques variables ayant diverses distances de pas sont formés, des champs magnétiques de stator ayant diverses vitesses sont formés, et le rotor à six pôles est amené à fonctionner à diverses vitesses de rotation nominales.
PCT/CN2022/079506 2022-03-07 2022-03-07 Moteur électrique à vitesses multiples à courant continu avec stator à deux phases et rotor à six pôles WO2023168552A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0096468A2 (fr) * 1982-06-07 1983-12-21 Eaton Corporation Machine électrique à aimant permanent en férrite et son application dans la traction des véhicules
CA1175475A (fr) * 1982-03-09 1984-10-02 Louis W. Parker Commutation electronique pour moteurs en continu
US6150791A (en) * 1998-05-22 2000-11-21 Switched Reluctance Drives Limited Operation of switched reluctance machines
CN102790478A (zh) * 2012-07-18 2012-11-21 王新友 一种将线圈绕在磁轭上的开关磁阻电动机制造方法
CN202840705U (zh) * 2012-09-18 2013-03-27 珠海格力电器股份有限公司 用于直流电机的定子和具有该定子的直流电机
CN205178671U (zh) * 2015-06-25 2016-04-20 顾明 一种定子及其相应的无刷直流、三相开关磁阻和罩极电机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1175475A (fr) * 1982-03-09 1984-10-02 Louis W. Parker Commutation electronique pour moteurs en continu
EP0096468A2 (fr) * 1982-06-07 1983-12-21 Eaton Corporation Machine électrique à aimant permanent en férrite et son application dans la traction des véhicules
US6150791A (en) * 1998-05-22 2000-11-21 Switched Reluctance Drives Limited Operation of switched reluctance machines
CN102790478A (zh) * 2012-07-18 2012-11-21 王新友 一种将线圈绕在磁轭上的开关磁阻电动机制造方法
CN202840705U (zh) * 2012-09-18 2013-03-27 珠海格力电器股份有限公司 用于直流电机的定子和具有该定子的直流电机
CN205178671U (zh) * 2015-06-25 2016-04-20 顾明 一种定子及其相应的无刷直流、三相开关磁阻和罩极电机

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