CN1249559A

CN1249559A - Electric motor

Info

Publication number: CN1249559A
Application number: CN 99117144
Authority: CN
Inventors: 郑炜
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-10-18
Filing date: 1999-10-18
Publication date: 2000-04-05

Abstract

An electric motor features that the internal surface of its stator core has convex magnetic pole pairs around which the exciting winding is wound, the polar face of magnetic pole has uniformly distributed longitudinal grooves, torque coils are embedded in the grooves of adjacent magnetic poles, the exciting winding is connected to AC power supply to generate alternative magnetic field, the induction current in rotor conductor generates magnetic field of rotor current, and the magnetic field acts on the current of torque coil to generate electromagnetic torque. Its advantages are single phase or three phases, external or internal rotation, no need of phase-shifting capacitors, high torque and easy speed regulation.

Description

Motor

The present invention relates to a kind of motor.

At present, the general single phase alternating current (A.C.) asynchronous motor of Shi Yonging, the annular stator core that is had groove by inner surface is formed with the two-phase stator coil and the cage rotor that embed the space mutual deviation 90 degree electrical degrees in stator core slot, add the electric current of out of phase for the two-phase stator coil, in stator and rotor core and in the air gap between the rotor, produce rotating magnetic field, rotor conductor cutting magnetic field induced potential, because rotor conductor forms the closed-loop path voluntarily, have electric current to flow through in rotor conductor, electric current in the rotor conductor and rotating magnetic field interact the generation electromagnetic force and drive rotor rotation.The shortcoming of this monopole asynchronous motor is that electromagnetic torque is little, and rotating speed control difficulty need be connected in series capacitor in a phase coil, so that the electric current of out of phase to be provided to diphase winding, because insert capacitor, the power of monopole asynchronous motor is restricted, and capacitor damages easily.

There is the speed governing difficulty in common in addition threephase asynchronous, the shortcoming that moment is little.

Through retrieving patent gazette in recent years, not seeing has novel alternating current motor that this respect is improved.

The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of motor is provided, this electric electromechanics magnetic torque is big, and rotating speed control is convenient, need not phase shifting capacitor, and power of electric motor is unrestricted.

Motor of the present invention, comprise the stator core that permeability magnetic material is made, be embedded with the rotor core that has the short-circuit loop conductor of one's own, the magnet exciting coil and torquer coil and the shell that form by the electric conducting material coiling, stator core is lobed at the equally distributed paired magnetic pole of circumferencial direction, stator core is identical with rotor core thickness, the two is coaxial, and be positioned at the same cross-sectional position, air gap between the two, the magnetic pole of stator core projection, magnetic between the magnetic pole is gripped and rotor core forms magnetic circuit jointly, magnet exciting coil is wound on the stator core, after magnet exciting coil adds AC power, in stator core and rotor core, produce alternating magnetic field, the magnetic flux in magnetic field is through magnetic pole, air gap, rotor core returns adjacent stator core magnetic pole and forms the closed-loop path, the magnetic polarity of stator core magnetic pole is followed successively by N-S, N-S......, alternating magnetic field is induced potential in rotor conductor, because rotor conductor has short-circuit loop of one's own, so produce electric current in the conductor, under the effect of rotor conductor electric current, also form magnetic field, this field pole distributes corresponding with the magnetic polarity of stator core magnetic pole, the magnetic flux in magnetic field is from rotor core, through air gap, the magnetic pole of stator core, yoke, magnetic pole returns rotor core, torquer coil embeds in the groove of stator core pole-face, when it adds AC power, there is electric current to flow through in the torquer coil, the Interaction Law of Electric Current of electric current formed magnetic field of rotor conductor and torquer coil produces electromagnetic action moment, maintains static owing to embed the stator core of torquer coil, and rotor is driven and rotates.

Below in conjunction with accompanying drawing motor of the present invention is described in further detail.

Fig. 1 is the structural representation of known common single phase alternating current (A.C.) asynchronous motor.

Fig. 2 is common single phase alternating current (A.C.) asynchronous motor is connected in series capacitor in a phase coil after, the circuit diagram of diphase winding external power supply.

Fig. 3 is the structure chart of first specific embodiments of motor of the present invention.

Fig. 4 is the structure chart of second specific embodiments of motor of the present invention.

Fig. 5 is the structure chart of the 3rd specific embodiments of motor of the present invention.

Fig. 6 is the structure chart of the 4th specific embodiments of motor of the present invention.

Fig. 1 shows the basic structure of known common monopole asynchronous motor, and Fig. 2 is common monopole asynchronous motor is connected in series capacitor in a phase coil after, the line map of diphase winding external power supply.After adding AC power for common monopole asynchronous motor coil, because string has shift capacitor C in a phase coil, current phase difference in A, the B diphase winding, in stator-rotor iron core and air gap, produce rotating magnetic field, rotor conductor cutting magnetic field induced potential, and in the rotor conductor that forms short-circuit loop voluntarily, producing electric current, electric current and rotating magnetic field effect produce electromagnetic torque and drive rotor rotation.Because the number of turn of stator coil depends on the size of operating voltage, frequency and iron core, after the number of turn is determined, magnetic flux density in the iron core depends on coil turn, if the rotating speed of rotor is a rated speed, then rotor conductor just can not change with the relative cutting speed of rotating magnetic field.Like this, the induced potential of rotor conductor and the electric current of generation are determined with regard to corresponding, and electromagnetic torque also just is determined.So when design, electromagnetic torque is subject to the size of iron core, when operation, because shift capacitor makes a electric current in mutually can only about in advance 70 spend electrical degrees, and the size of current difference in the diphase winding, so the magnetic field in the air gap is the elliptical rotating field, electromagnetic torque is diminished.

Fig. 3 shows the structure of first specific embodiments of motor of the present invention, this motor comprises the stator core of being made by permeability magnetic material 1, be embedded with the rotor core of making by permeability magnetic material 4 that has short-circuit loop conductor 5 of one's own, the magnet exciting coil 2 and torquer coil 3 and the shell 6 that form by the electric conducting material coiling, the inner surface of stator core 1 be the projection at the equally distributed paired magnetic pole of circumferencial direction, the magnetic pole pole-face has equally distributed axial groove at circumferencial direction, during magnet exciting coil 2 is slotted around the magnetic pole root of stator core 1, each both sides, unit of torquer coil 3 embed respectively in the groove of the adjacent pole pole-face of stator core 1, after magnet exciting coil 2 is connected AC power, in stator core 1 and rotor core 4, produce alternating magnetic field, this alternating magnetic field induces electromotive force and produces electric current in rotor conductor 5, electric current in the rotor conductor 5 also forms magnetic field, the magnetic flux in this magnetic field is through the magnetic pole of stator core 1, yoke between magnetic pole, another adjacent pole is got back to rotor core 4, forms the closed-loop path.Connect AC power to torquer coil, produce electric current in its coil, the formed magnetic field interaction of the electric current of this electric current and rotor conductor 5 produces electromagnetic action moment and makes rotor rotation.

Fig. 4 shows the structure of second specific embodiments of motor of the present invention, and the composition of this motor is identical with the motor of Fig. 3 with operation principle.Its difference is that magnet exciting coil 2 is wound on the yoke between the magnetic pole of stator core 1, cuts along warp-wise at the symmetrical center line of the magnetic pole of any one stator core 1, stator core 1 is divided into two parts symmetrical, so that coiling magnet exciting coil 2.

Fig. 5 shows the structure of the 3rd specific embodiments of motor of the present invention.The composition of this motor is identical with the motor of Fig. 3 with operation principle, and its difference is that this motor is an outward rotation type.

Fig. 6 shows the structure of the 4th specific embodiments of motor of the present invention.The composition of this motor is identical with the motor of Fig. 3 with operation principle, its difference is that this motor uses three phase mains, the number of magnetic poles of stator core 1 be 32 times at the most doubly, magnetic pole is divided into the A phase successively, B mutually with C mutually, magnet exciting coil 2 and torquer coil 3 also are divided into A, B, C three-phase, the magnet exciting coil 2 of every phase are wound on the homophase magnetic pole of stator core 1, and the torquer coil 3 of every phase embeds in the groove of adjacent homophase magnetic pole pole-face.

The motor of each embodiment of the invention described above, can be with an AC power to magnet exciting coil 2 and torquer coil 3 power supplies, also can be with two AC power respectively to magnet exciting coil 2 and torquer coil 3 power supplies, under former instance, regulate supply voltage and can regulate the rotating speed of motor, under latter instance, change the rotating speed that any one supply voltage also can be regulated motor, only the speed adjusting performance under the latter instance can be better than the speed adjusting performance under the former instance.

When design, suitably increase the cross-sectional area of the magnetic pole pole-face groove of stator core 1, can increase the number of turn of torquer coil 3, thereby under the situation of identical core volume, moment can increase.

Motor of the present invention when being used for single phase alternating current power supply, need not CSET, so power is unrestricted.

Undoubtedly, motor of the present invention also can have multiple mapped structure form, is not limited in the concrete structure of above-mentioned execution mode.As can designing linear motor, use motor Fig. 6 of three phase mains can be with excitation winding 2 around yoke portion of iron core 1 or the like according to principle of the present invention.In a word, protection scope of the present invention should comprise those conspicuous to those skilled in the art variations.

Claims

1. motor, comprise the stator core of making by permeability magnetic material (1), be embedded with the rotor core of making by permeability magnetic material (4) that has short-circuit loop conductor (5) of one's own, the magnet exciting coil (2) and torquer coil (3) and the shell (6) that form by the electric conducting material coiling, it is characterized in that: the inner surface of stator core (1) for the projection at the equally distributed paired magnetic pole of circumferencial direction, the magnetic pole pole-face has equally distributed axial groove at circumferencial direction, magnet exciting coil (2) is on the magnetic pole of stator core (1), each both sides, unit of torquer coil (3) embed respectively in the groove of the adjacent pole pole-face of stator core (1), the thickness of stator core (1) is identical with the thickness of rotor core (4), the two is coaxial, be positioned at same sectional position, leave the gap between the two.

2. motor according to claim 1 is characterized in that: the magnetic pole pole-face of described stator core (1) is a concave arc shape, and two sides of magnetic pole respectively have a groove at root along axis direction, on the outlet both sides of groove one fin are arranged respectively.

3. motor, comprise the stator core of making by permeability magnetic material (1), be embedded with the rotor core (4) that has short-circuit loop conductor (5) of one's own, the magnet exciting coil (2) and torquer coil (3) and the shell (6) that form by the electric conducting material coiling, it is characterized in that: the inner surface of stator core (1) for the projection at the equally distributed paired magnetic pole of circumferencial direction, the magnetic pole pole-face has equally distributed axial groove at circumferencial direction, magnet exciting coil (2) is on the yoke between stator core (1) adjacent pole, each both sides, unit of torquer coil (3) embed respectively in the groove of the adjacent pole pole-face of stator core (1), the thickness of stator core (1) is identical with the thickness of rotor core (4), the two is coaxial, be positioned at same sectional position, leave the gap between the two.

4. motor according to claim 3 is characterized in that: the magnetic pole pole-face of described stator core (1) is a concave arc shape, radially cuts at the symmetrical center line of any one magnetic pole, stator core (1) is divided into two parts of symmetry.

5. motor, comprise the stator core of making by permeability magnetic material (1), internal circular surfaces is embedded with the rotor core (4) that has short-circuit loop conductor (5) of one's own, the magnet exciting coil (2) and torquer coil (3) and the shell (6) that form by the electric conducting material coiling, it is characterized in that: the outer surface of stator core (1) for the projection at the equally distributed paired magnetic pole of circumferencial direction, the magnetic pole pole-face has equally distributed axial groove at circumferencial direction, magnet exciting coil (2) is on the magnetic pole of stator core (1), each both sides, unit of torquer coil (3) embed respectively in the groove of the adjacent pole pole-face of stator core (1), the thickness of stator core (1) is identical with the thickness of rotor core (4), the two is coaxial, be positioned at same sectional position, leave the gap between the two.

6. motor according to claim 5 is characterized in that: the magnetic pole pole-face of described stator core (1) is the dome arc, and two sides of magnetic pole respectively have a groove at root along axis direction, on the outlet both sides of groove one fin are arranged respectively.

7. according to any one described motor of claim 1 to 6, it is characterized in that: the magnetic pole of stator core (1) be 1 pair right at the most, the number of magnet exciting coil (2) and torquer coil (3) equals the number of magnetic pole.

8. motor, comprise the stator core of making by permeability magnetic material (1), outer round surface is embedded with the rotor core of being made by permeability magnetic material (4) that has short-circuit loop conductor (5) of one's own, encourage coil (2) and torquer coil (3) and shell (6) by what the electric conducting material coiling formed, it is characterized in that: the inner surface of stator core (1) for the projection at the equally distributed magnetic pole of circumferencial direction, the magnetic pole pole-face has equally distributed axial groove at circumferencial direction, number of magnet poles be 32 times at the most doubly, be divided into A successively, B, C, phase, each phase excitation coil of ABC (2) is wound on respectively on each phase magnetic pole, and each phase torquer coil (3) of ABC embeds respectively in the groove of the adjacent magnetic pole pole-face of homophase.

9. motor according to claim 8 is characterized in that: the magnetic pole pole-face of described stator core (1) is a concave arc shape, and two sides of magnetic pole respectively have a groove vertically at root, on the outlet both sides of groove one fin are arranged respectively, and it is wide that the magnetic pole root is wider than pole-face.

10. according to any one described motor of claim 1 to 9, it is characterized in that, magnet exciting coil (2) is wound on the protruding magnetic pole or on the yoke between magnetic pole, two limits of torquer coil (3) embed in the groove of two pole-faces of the magnetic flux process that magnet exciting coil (2) is produced.