CN2492002Y

CN2492002Y - D.C. motor without commutator

Info

Publication number: CN2492002Y
Application number: CN 01250049
Authority: CN
Inventors: 浮国正
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-10
Filing date: 2001-07-10
Publication date: 2002-05-15
Anticipated expiration: 2011-07-10

Abstract

The utility model relates to a no commutator direct current motor, which comprises a stator and rotor, wherein the stator of the motor comprises two ring cores which are corresponding at the left and the right, radial magnetic arms which number is equal and the position is corresponding are equably arranged on each ring core, the ends of the magnetic arms are fixed on a frame, a wire chase which is made by a non-magnetic material is fixed on an outer wall of the ring core of every two magnetic arms, and a low wire chase is arranged on the inner wall of the ring core which is arranged on a corresponding position of each magnetic arm. A stator armature winding of each ring core is cocurrently and orderly winded in the low wire chase and the non-magnetic material wire chase which corresponds to the inner wall and the outer wall of the ring core, the enwinding direction of the windings which are arranged on the left and right corresponding positions is opposite, and two stator armature windings are mutually concatenated, thereby the vibration , the torque ripple and the noise which are caused by the current shock are avoided, an electronic reversing device is saved, the cost of the motor is greatly reduced, and the utility model is beneficial to be popularizated and applicated.

Description

The absence of commutator direct current machine

Technical field

The utility model relates to technical field of motors, relates in particular to a kind of absence of commutator direct current machine.

Background technology

Direct current machine can be divided into electronically commutated direct current machine and mechanical commutation formula direct current machine two big classes.Brshless DC motor just belongs to electronically commutated direct current machine, structure is roughly as follows: put permanent-magnet steel on its rotor, place the polyphase armature winding on the stator, receive on the DC power supply via driver, stator adopts position transducer to realize that electronic commutation replaces brush and commutator.Each is switched on one by one mutually and produces electric current, interacts with rotor pole palm main field, produces torque.Along with the development of electronics industry, electronic devices and components are constantly made a price reduction, but this type of motor just with reliable operation, volume is little, in light weight, noise is low, precision is high, torque is big, superior functions such as economize on electricity stepless speed regulation etc. have occupied leading position gradually.However, its weak point is still waited to improve.At first, the cost height, at western developed country, its electronic system is about 1: 1 with the cost ratio of motor itself, and at home up to 3: 2, expensive its economy that makes descends to some extent; Secondly, the electronic system complex structure, condition of work is had relatively high expectations.Thereby the motor rated voltage is not high, and rated power is little, how to have obtained promotion and application at little special type machine field at present.Its polyphase windings energising successively can cause certain vibration, noise and torque pulsation.When using as generator, its structure also must be done bigger adjustment.

The utility model content

At above-mentioned problems of the prior art, the purpose of this utility model is to provide a kind of absence of commutator direct current machine, with reduce this type of motor cost, improve motor power, eliminate vibration, reduce noise and torque pulsation.

For achieving the above object, the technical solution of the utility model is to have adopted a kind of absence of commutator direct current machine, comprise stator and rotor, the stator of this motor comprises ring-shaped core corresponding about two, evenly being provided with quantity on each ring-shaped core equates, the magnetic conduction arm radially of position correspondence, the end of magnetic conduction arm is fixed on the support, be fixed with the wire casing that a nonmagnetic substance is made on the outer wall of the ring-shaped core between per two magnetic conduction arms, the ring-shaped core inwall of each magnetic conduction arm correspondence position is provided with wire casing, the stator armature winding is wound in the following wire casing and nonmagnetic substance wire casing corresponding on the ring-shaped core inside and outside wall in the same way successively on each ring-shaped core, the winding technique direction of corresponding position, two ring-shaped core left and right sides is opposite, and two stator armature windings are connected mutually.

Described rotor constitutes by being fixed on two fixing disc utmost points palms of middle cylindrical permanent magnet of rotating shaft and permanent magnet two ends, and two disc utmost points palms are corresponding with two ring-shaped cores respectively.

Described rotor constitutes by being fixed on the middle cylindrical rotor of rotating shaft two disc utmost points palms unshakable in one's determination and its two ends, two disc utmost point palms are radially corresponding with two ring-shaped cores, the rotor core surface is wound with excitation winding, and the two ends of excitation winding link to each other with field power supply with corresponding brush by a pair of slip ring that is fixed on rotating shaft one end.

Described rotor is made of the round ring magnet that is fixed in the rotating shaft, and the periphery of round ring magnet folds up between two ring-shaped cores, and the magnetic line of force direction of round ring magnet is parallel with rotor shaft direction.

Described stator ring iron core is formed by the semicircular ring of two symmetries make-up mutually unshakable in one's determination.

The magnetic circuit sectional area of magnetic conduction arm is greater than the magnetic circuit sectional area of institute's corresponding circle dish type utmost point palm.

The long-pending cross-sectional area that is not more than rotor core of the external peripheral surface of the described disc utmost point palm.

Owing to need not to be provided with commutator in the rotating shaft of the present utility model, do not have change of current problem, thereby power of motor can be done greatlyyer.In addition, absence of commutator, vibration, torque pulsation and the noise of also having avoided rush of current to cause.Through type does not commutate, and has saved the electronic commutation system yet, and the cost of motor is reduced greatly, helps applying.The ring-shaped core of stator is designed to two semicircular ring fastening structures, is convenient to the coiling of armature winding, help to enhance productivity, this motor has invertibity, use as generator, can reduce the degaussing armature reaction, can obtain waveform direct current preferably without filtering.

Description of drawings

Fig. 1 is the structural representation of a kind of execution mode of the utility model;

Fig. 2 is the A-A profile of Fig. 1;

Fig. 3 is the fundamental diagram of Fig. 1;

Fig. 4 is the structural representation of the another kind of execution mode of the utility model.

Embodiment

Embodiment 1, as shown in Figure 1 and Figure 2.Among this embodiment, stator comprises two symmetrical ring-shaped cores 2, be evenly distributed with six magnetic conduction arms 3 radially on the ring-shaped core 2, the iron core of armature and magnetic conduction arm are axially built up by the silicon steel sheet of surface insulation jointly, and compress with the bolt or the circumferential band of surface insulation.Between adjacent two magnetic conduction arms 3, promptly all be fixed with a plastics wire casing 11 on the outer wall of ring-shaped core, the inwall of the ring-shaped core of each magnetic conduction arm 3 correspondence is provided with down wire casing.Each ring-shaped core is formed by the semicircular ring make-up of two halves same structure.Such structure is convenient to the coiling of armature winding on each ring-shaped core.Be surrounded with armature winding on the following wire casing of the inside and outside wall of each ring-shaped core and the wire casing 11 in turn in the same way.The armature winding of each ring-shaped core can per two grooves one group, one group one group in the same way around, connect mutually with single line, also can take successively in the same way around, on two ring-shaped cores 2 about two relative armature winding around on the contrary, the armature winding on two ring-shaped cores is connected in series.The outer end of the magnetic conduction arm of two ring-shaped cores is fixed on the non-magnetic support 5, and the magnetic conduction arm outer end of two ring-shaped cores forms magnetic loop by the low iron loss magnetic conductor liner 13 of the bar shaped of support 5 internal fixation.

In the present embodiment, the rotor of motor is made of two fixing disc utmost point palms 1 of cylindrical core 6 that is fixed on non-magnetic rotating shaft 10 middle parts and two ends thereof.Two disc utmost point palms are radially corresponding with two ring-shaped cores.Be wound with excitation winding on the cylindrical rotor iron core 6, the magnetic line of force of excitation winding and shaft parallel, the two ends of excitation winding are connected on the fixing a pair of slip ring 7 of rotating shaft one end, and link to each other with field power supply by slip ring 7, the two ends of rotating shaft are fixed with non-magnetic fan blade 8, and the two ends of rotating shaft are assemblied on the two non-magnetic end caps 4 by bearing.The long-pending cross-sectional area that is not more than rotor core 6 of the external peripheral surface of the disc utmost point palm 1.The magnetic circuit sectional area of magnetic conduction arm is greater than the magnetic circuit sectional area of institute's corresponding circle dish type utmost point palm.

Among the embodiment 1, rotor also can save excitation winding, substitutes the cylindrical rotor iron core with permanent magnet.

The operation principle of embodiment 1 as shown in Figure 3, when armature winding by with the electric current of direction as shown in the figure, and to after the excitation winding energising, left side ring-shaped core (shown in Zuo Bantu), right side ring-shaped core (shown in half figure of the right side), the discoid utmost point palm in a rotor left side (shown in the left half figure center circle portion), the right discoid utmost point palm of rotor (shown in the right half figure center circle portion), the cylindric iron core of rotor, a left side, right magnetic conduction arm and inboard wall of base high resistance magnetic conductor form magnetic loop, the current in wire and the rotor field that are on the ring-shaped core inwall in the magnetic circuit act on the generation electromagnetic force each other, a because left side, current opposite in direction on the right ring-shaped core, magnetic line of force direction is opposite, therefore the electromagnetic torque direction that rotor is produced is identical, can be by the outside output mechanical power of rotor.By even pressure regulation or evenly evenly speed governing of adjustable magnetic.

Embodiment 2 among the figure, is that with the difference of embodiment 1 rotor is made of the round ring magnet 9 that is fixed in the rotating shaft 10 as shown in Figure 4, and the periphery of round ring magnet 9 folds up between two ring-shaped cores 2.Operation principle repeats no more with embodiment 1 herein.

Claims

1. absence of commutator direct current machine, comprise stator and rotor, it is characterized in that: the stator of this motor comprises ring-shaped core corresponding about two, evenly being provided with quantity on each ring-shaped core equates, the magnetic conduction arm radially of position correspondence, the end of magnetic conduction arm is fixed on the support, be fixed with the wire casing that a nonmagnetic substance is made on the outer wall of the ring-shaped core between per two magnetic conduction arms, the ring-shaped core inwall of each magnetic conduction arm correspondence position is provided with wire casing, the stator armature winding is wound in the following wire casing and nonmagnetic substance wire casing corresponding on the ring-shaped core inside and outside wall in the same way successively on each ring-shaped core, the winding technique direction of corresponding position, two ring-shaped core left and right sides is opposite, and two stator armature windings are connected mutually.

2. direct current machine according to claim 1 is characterized in that: described rotor constitutes by being fixed on two fixing disc utmost points palms of middle cylindrical permanent magnet of rotating shaft and permanent magnet two ends, and two disc utmost points palms are corresponding with two ring-shaped cores respectively.

3. direct current machine according to claim 1, it is characterized in that: described rotor constitutes by being fixed on the middle cylindrical rotor of rotating shaft two disc utmost points palms unshakable in one's determination and its two ends, two disc utmost point palms are radially corresponding with two ring-shaped cores, the rotor core surface is wound with excitation winding, and the two ends of excitation winding link to each other with field power supply with corresponding brush by a pair of slip ring that is fixed on rotating shaft one end.

4. direct current machine according to claim 1, it is characterized in that: described rotor is made of the round ring magnet that is fixed in the rotating shaft, the periphery of round ring magnet folds up between two ring-shaped cores, and the magnetic line of force direction of round ring magnet is parallel with rotor shaft direction.

5. according to arbitrary described direct current machine of claim 1-4, it is characterized in that: described stator ring iron core is formed by the semicircular ring of two symmetries make-up mutually unshakable in one's determination.

6. according to arbitrary described direct current machine of claim 1-3, it is characterized in that: the magnetic circuit sectional area of magnetic conduction arm is greater than the magnetic circuit sectional area of institute's corresponding circle dish type utmost point palm.

7. according to arbitrary described direct current machine of claim 1-3, it is characterized in that: the long-pending cross-sectional area that is not more than rotor core of the external peripheral surface of the described disc utmost point palm.