CN2364620Y

CN2364620Y - Semiconductor converter low-speed reluctance motor

Info

Publication number: CN2364620Y
Application number: CN 99203620
Authority: CN
Inventors: 陈永校; 史涔溦; 吴建华; 林瑞光
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 1999-02-12
Filing date: 1999-02-12
Publication date: 2000-02-16
Anticipated expiration: 2009-02-12

Abstract

The utility model relates to a semiconductor converter low-speed reluctance motor comprising a convex pole type stator iron core and a hidden pole type rotor iron core. The rotors are not provided with coils. A stator convex pole is provided with small teeth. The sum Z1 of the small teeth, the quantity Z2 of rotor teeth and the maximum frequency P< v > of occurrence of air gap permeability satisfy the formula that Z1 equals to Z2 plus or minus P< v >. The convex pole is respectively sheathed with concentrated coils. Coils in the quantity of P< v > are connected in series and connected with a diode in series for forming coil assemblies, and the spaces of the coils are arranged on corresponding positions of a magnetic field. The coil assembly of every phase is formed by two coils connected in parallel with 180 DEG of electricity angle of space phase difference. A motor can run on a three-phase or single-phase power supply. The utility model has the advantages of simple structure, easy fabrication, low cost, big force moment, wide rotary speed and safe operation.

Description

Semiconductor converting low speed reluctance motor

The utility model relates to a kind of slow-speed motor, need in the industries such as food processing, chemical industry, building materials, household electrical appliances to be specially adapted to low-speed and large-torque to drive and the occasion that stirs.

In order to obtain low-speed and large-torque, the most frequently used in the past is to adopt mechanical reduction gear, so not only make structure, the manufacturing process of whole system complicated, increased volume and weight, and because the influence of factors such as the backlash of gear, tooth Profile Machining, wearing and tearing, the precision and the reliability of whole system are reduced, and rotary speed unstabilization is fixed, and noise is big and efficient is low.Also have in addition and adopt traditional electromagnetic deceleration formula motor, this motor stator to adopt the interchange distributed winding, the manufacturing process complexity, consumption copper is many, the cost height, and energy index is not high.

The purpose of this utility model provides a kind of simple in structure, and is easily manufactured, and cost is low, safe and reliable to operation, and the range of speeds is wide, the semiconductor converting low speed reluctance motor that moment is big.

Technical solution of the present utility model is: motor comprises the salient pole type stator core, the distributed polar rotor iron core, and rotor does not have winding, has several little teeth on each stator salient poles, establishes rotor tooth and adds up to Z ₂, the minimum tooth of salient stator adds up to Z ₁, then the stator and rotor number of teeth satisfies Z ₁=Z ₂± P _υ, (P _υBe air-gap permeance maximum occurrence number), on stator salient poles, be equipped with concentrating coil respectively, the space is in the P of magnetic field relative position _υIndividual coil is connected in series a diode again along the polarity series connection becomes a coil groups, and each phase winding of motor is two coil groups parallel connections that differed 180 ° of electrical degrees by the space, and two diodes wherein are anti-and constitute.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a kind of stator and rotor of the utility model schematic diagrames unshakable in one's determination;

Fig. 2 is that Fig. 1 motor windings constitutes schematic diagram;

Winding connection figure when Fig. 3 is single phasing;

Fig. 4 is the machine operation schematic diagram.

Example shown in Figure 1, semiconductor converting low speed reluctance motor air-gap permeance maximum occurrence number P _υ=2, stator core I has 12 salient poles, and distributed polar rotor II unshakable in one's determination does not have winding, its tooth number Z ₂=34, the minimum tooth of salient stator sum Z then ₁=Z ₂+ P _υ=36, have 3 little tooth IV on each salient pole, be equipped with concentrating coil III on each salient pole respectively, (the #1 coil only draws among the figure), 2 coils that the space are in the magnetic field relative position are connected in series a diode again along the polarity series connection and form a coil groups, and this motor has #1, #7 coil and diode D respectively in the 360 ° of electrical degrees in space ₁, #2, #8 coil and diode D ₃, #3, #9 coil and diode D ₅, #4, #10 coil and diode D ₂, #5, #11 coil and diode D ₄, #6, #12 coil and diode D ₆Form six coil groups, see shown in Figure 2ly, the space is differed two coil groups parallel connections of 180 ° of electrical degrees, two diodes wherein are anti-and just constituted a phase winding of motor.Three phase windings can be connected into Y or delta connection, connect three phase mains and become three phase electric machine, also can will connect power supply after the two-phase windings in series as shown in Figure 3, and another phase winding connects power supply after the electric capacity phase-splitting become monophase machine.

The utility model motor is to turn round by the electromagnetic torque driving of magnetic resistance character, and its operation principle for the sake of simplicity, is set 12 salient poles of son with reference to Fig. 4, and little tooth is 1 on each salient pole, i.e. the stator tooth number Z ₁=12, the rotor tooth number Z ₂=10 (or 14), wherein P _υ=2.During work, three-phase stator winding connects three-phase symmetrical alternating current power supply, if Fig. 4 a) shown in diode D constantly ₁, D ₃Conducting, #1, #7 and #2, #8 coil electricity produce magnetic field, because stator 1 tooth and 7 teeth and rotor tooth misalignment, magnetic field is distorted, and rotor will tend to the state of magnetic resistance minimum, drives rotor by direction as shown rotation (turning to when 14 teeth of rotor opposite with direction as shown) so produce electromagnetic torque; When rotor turns over 60 ° of electrical degrees to Fig. 4 b) during the position, D ₃Disconnect D ₁, D ₆Conducting, #1, #7 and #12, #6 coil electricity produce magnetic field and electromagnetic torque and make that rotor continues to rotate by direction as shown, and the rest may be inferred.The conducting order of diode is D in the one-period ₁D ₃-D ₁D ₆-D ₆D ₄-D ₄D ₂-D ₂D ₅-D ₅D ₃, every have a diode change of current through 60 ° of electrical degrees, and every pipe continues 120 ° of electrical degrees of conducting.Thereby this motor is by the on-off action of the diode that directly links to each other with stator winding, makes each phase winding by graded energized successively, produces rotating magnetic field and the constant electromagnetic torque of direction, realizes the continuous running of motor.

Motor of the present utility model can be that rotor is the electric rotating machine of internal rotor or external rotor, also can be launched into straight-line linear electric motors.

In sum, semiconductor converting low speed reluctance motor rotor of the present utility model does not have winding, stator adopts concentrates winding, with the turn-on and turn-off of diode realization winding current, its structure is very simple, makes, use all very convenient, safe and reliable to operation, cost is low, and volume is little, and test shows, the rotating speed of this motor can change from several hundreds ofs that forward to of per minute, torque is an ox rice from several ox rice to hundreds of, and its range of speeds is wide, and moment is big, starting current is little, and starting, the time of braking and counter-rotating is short, is suitable for Fraquent start, power factor can reach 1.0 when braking and rotating work, single phase poaer supply moved down.The part that does not have high speed rotating and wear and tear easily, running is steady, and noise is low; Being applied to food processing industry, can having avoided fully because gear box lubricating oil leaks the pollution to food that causes, is a kind of environment-friendly type motor.

Claims

1. semiconductor converting low speed reluctance motor is characterized in that it comprises salient pole type stator core [I], distributed polar rotor iron core [II], and rotor does not have winding, has several little teeth [IV] on each stator salient poles, establishes rotor tooth and adds up to Z ₂, the minimum tooth of salient stator adds up to Z ₁, then the stator and rotor number of teeth satisfies Z ₁=Z ₂± P _υ, (P _υBe air-gap permeance maximum occurrence number), on stator salient poles, be equipped with concentrating coil [III] respectively, the space is in the P of magnetic field relative position _υIndividual coil is connected in series a diode again along the polarity series connection becomes a coil groups, and each phase winding of this motor is two coil groups parallel connections that differed 180 ° of electrical degrees by the space, and two diodes wherein are anti-and constitute.

2. by the described semiconductor converting low speed of claim 1 reluctance motor, it is characterized in that motor is that rotor is the electric rotating machine of internal rotor or external rotor, perhaps launch to become straight-line linear electric motors.

3. by the described semiconductor converting low speed of claim 1 reluctance motor, it is characterized in that this motor is the three phase electric machine that connects three-phase alternating-current supply, or for the monophase machine of order cross streams power supply, when being monophase machine, to connect power supply after the two-phase windings in series in three phase windings, another phase winding connects power supply after the electric capacity phase-splitting.