CN87102996A

CN87102996A - DC linear motor

Info

Publication number: CN87102996A
Application number: CN87102996.0A
Authority: CN
Inventors: 易本昌
Original assignee: STATE-OWNED XINHUA CHEMICAL PLANT
Current assignee: STATE-OWNED XINHUA CHEMICAL PLANT
Priority date: 1987-04-22
Filing date: 1987-04-22
Publication date: 1987-11-18
Also published as: CN1008036B

Abstract

DC linear motor has paired excitatory magnetic pole and the armature with winding, and magnetic pole is symmetrically distributed in the both sides of armature, and magnetic flux is horizontally through armature and forms the loop.It is characterized in that the both sides of two effective end bays of armature winding around armature, its span equals pole span, and armature is the sheet metal of a square-section.The another kind of form of armature is made up of a plurality of staggered T steel plates.Wherein get up with wire coupling and constitute an element of winding in the end of two T shape plates, and the distance of two T shape plates equals pole span, has cancelled special-purpose armature core.T shape plate plays conduction, magnetic conduction, commutation.

Description

DC linear motor

The present invention is a DC linear motor, is specifically related to a kind of armature structure through improving and simplifying, and can be widely used in the DC linear motor of industrial transport system.

Known DC linear motor is made up of movable part and standing part, and armature and magnetic pole all can be used as moving body, owing to technical and structural reason can only make small-power, and low velocity, the motor of short stroke.The DC linear electric motor of the disclosed transverse magnetic flux of Russian Patent SU433602, having the short closed conductor of packet type (the mouse dragon formula coil that is equivalent to divide into groups) on the armature is a kind of no winding armature, the effective length of its armature conductor only equals the height of magnetic pole, being in operation to provide powerful electric current and extremely low voltage, the inevitable very big loss of generation on line-spacing and current-collector of big like this electric current, its power is little, poor practicability.Another kind of disclosed as Russian Patent SU760 326 be a kind of axial magnetic flux DC linear electric motor, the magnetic flux that its excitatory magnetic pole produced axially forms closed magnetic circuit through armature core, this just must be increased to the armature core cross section with the magnetic pole work area onesize, so also can only make small-power, the motor of short stroke.

The objective of the invention is provides a kind of armature structure different DC linear electric motor in order to overcome above-mentioned defective, its watt level, and the speed height, stroke length no longer is subjected to the restriction of prior art and structure, can be widely used in the industrial transport system.

This DC linear electric motor is by movable part and standing part, and forming movable part is paired excitatory magnetic pole, and stationary part is the armature with winding, and brush is placed on the geometrical neutral line of magnetic pole.Along armature radially, opposite polarity many to the magnetic pole symmetry, be distributed in the both sides of armature, adjacent single pole polarity along the armature axially-aligned is opposite, magnetizing flux under the magnetic pole working face is horizontally through armature and forms the loop, armature also can be used as the guide rail of movable part except transmitting transverse magnetic flux, it can arbitrarily extend on demand.The excitation mode of motor can be shunt excitation formula, series excitation type, compounding formula or magneto.

The characteristics of this DC linear electric motor are the improvement and the simplification of armature structure.Armature core is a stripe board, the span of armature coil two effective edges equals pole span, stride and be around in both sides of armature and vertical with the transverse magnetic line of force, two effective edges of said coil are in respectively under the opposite polarity adjacent a pair of magnetic pole, another form of armature core is made up of a plurality of staggered T shape plates, T shape plate is formed the element of winding of armature again, plays conduction, the effect of magnetic conduction and commutation.The end that two distances equal the T shape plate of pole span becomes an element of winding with wire bond, and said two blocks of T shape plates lay respectively under the adjacent a pair of magnetic pole.

The armature structure of this DC linear electric motor is divided into three kinds of different armature forms by the watt level of motor, and promptly the slot-less armature has slot type armature and coreless type armature, and their circuit tie lines principle all is identical.

Fig. 1 is the schematic diagram of slot-less electric motor with armature.

Fig. 2 is and the corresponding developed winding diagram of Fig. 1 armature winding.

Fig. 3 is the structural representation of slot-less electric motor with armature.

Fig. 4 is the schematic diagram that the slot type electric motor with armature is arranged.

Fig. 5 is the structure diagram that the slot type electric motor with armature is arranged.

Fig. 6 is the schematic diagram of no iron core formula electric motor with armature.

Fig. 7 is the structural representation of no iron core formula electric motor with armature.

Below in conjunction with accompanying drawing this programme is described in detail.

The slot-less electric motor with armature, its armature core is a rectangle low carbon steel plate, the span of two effective edges of armature loop equals pole span τ, stride the both sides that are around in armature core, and the brush strictness is placed on the geometrical neutral line of magnetic pole, guaranteeing in the middle of the identical a pair of magnetic pole of polarity, the current in wire direction of both sides of armature is always consistent.

As shown in Figure 1, will be in middle (1)～(17) of three pairs of magnetic poles is that coil is partitioned into equal four sections, i.e. (1)～(5), (5)～(9), (9)～(13), (13)～(17).Original only need 5 brushes just can realize, but for symmetry and the current density that alleviates brush increased by 6 again ', 7 ', 8 ', three brushes, in fact brush 2 ' with 8 ', 3 ' with 7 ', 4 ' contact simultaneously respectively on same lead with 6 ' all.

Brush 1 ', 3 ', 5 ', 7 ' positive supply connect.2 ', 4 ', 6 ', 8 ' connect negative supply, with this 4 sections coil groups are together in parallel, the current opposite in direction in adjacent two sections coil groups, thus guaranteed that in the middle of with a pair of magnetic pole current in wire direction of both sides of armature is always consistent.This kind motor inertia is little, and flexible movements are applicable to low power electric tool, as electric saw, and manipulator and door opener etc.As adopt iron enamelled wire Alloy instead of Copper lacquer line, and can not only dwindle air-gap, improve efficiency of motor, but also can increase the mechanical strength of armature.

Among Fig. 3, the 10th, field core is wound with magnetizing coil 11,12nd, armature core on it, be wound with armature winding 13,14th on it, brush, the 15th, needle bearing, the 16th, the trough of the end jumper of doing with insulation board, the 17th, the channled rail of thin corrosion resistant plate system, the 18th, the backing plate of nonmagnetic substance.

The slot type electric motor with armature is arranged, its field core and armature core adopt silicon steel sheet to build up and be connected into series excitation type, armature is strip, and the principle that the winding mode of armature still equals pole span τ by the span of two effective edges of armature loop is striden and is around in the corresponding groove of both sides of armature.As shown in Figure 4, in groove as lay three elements of winding, the top of an element connects commutator segment 40, the top that end connects commutator segment 43 and 41, No. two elements connects commutator segment 41, and end connects commutator segment 44 and 42.This kind motor is applicable to the straight line transmission of the high middle low power lathe of speed governing performance requirement, can be used on the power of alterating and direct current.

Among Fig. 5,20-field core, 21-magnetizing coil, 22-guide rail, 23-commutator segment, 24-armature core, 25-armature winding, 26-base.

No iron core formula electric motor with armature, armature is made up of a plurality of staggered T steel plates, wherein the end of two T shape plates links up with jumper and constitutes an element of winding, T shape plate a is equivalent to an effective edge of the element of winding, T shape plate b is equivalent to another effective edge, and the distance from T shape plate a to T shape plate b equals pole span τ.All T shape plate is that lay the paramagnetic field, and it is very little for the transverse magnetic flux magnetic resistance, and leaves the gap and be filled with insulant between the adjacent vertically T shape plate, has increased the magnetic resistance of axial magnetic flux greatly.Because T shape plate directly as the electric conductor of armature loop, has been cancelled special-purpose armature core, has realized electric conductor, magnetic conductor, the commutator segment Trinity.This kind motor is applicable to the material transport vehicle and the tractor of high and medium power, and armature body also can serve as the guide rail of motion parts.

Among Fig. 7,30-field magnet, 31-magnetizing coil, 32-T shape plate, 33-end jumper, 34-guide rail, 35-base.

Claims

1, a kind of DC linear motor, excitatory magnetic pole and the armature with winding are arranged, along armature radially, opposite polarity many both sides that magnetic pole are symmetrically distributed in armature, adjacent single pole polarity along the armature axially-aligned is opposite, and the magnetizing flux under the magnetic pole working face is horizontally through armature and forms the loop.Brush is placed on the geometrical neutral line of magnetic pole, it is characterized in that armature core is a stripe board, the span of armature coil two effective edges equals pole span, strides to be around in both sides of armature and vertical with the transverse magnetic line of force, and two effective edges of said coil are in respectively under the opposite polarity adjacent a pair of magnetic pole.

2, a kind of series excitation type DC linear motor, excitatory magnetic pole and armature that useful silicon steel sheet builds up, on the armature of fluting winding is arranged, the two ends of each element of winding are connected on respectively on the commutator segment of both sides of armature, along armature radially, opposite polarity many both sides that magnetic pole are symmetrically distributed in armature, adjacent single pole polarity along the armature axially-aligned is opposite, magnetizing flux under the magnetic pole working face is horizontally through armature and forms the loop, brush is placed on the geometrical neutral line of magnetic pole, it is characterized in that armature is strip, the span of armature coil two effective edges equals pole span, stride and be around in both sides of armature and vertical with the transverse magnetic line of force, two effective edges of said coil are in respectively under the opposite polarity adjacent a pair of magnetic pole.

3, a kind of DC linear motor, along armature radially, opposite polarity many both sides that magnetic pole are symmetrically distributed in armature, adjacent single pole polarity along the armature axially-aligned is opposite, magnetizing flux under the magnetic pole working face is horizontally through armature and forms the loop, brush is placed on the geometrical neutral line of magnetic pole, it is characterized in that armature is made up of a plurality of staggered T shape plates, get up with wire coupling and constitute an element of winding in the end of two T shape plates wherein, distance between said two T shape plates equals pole span, lays respectively under the adjacent a pair of magnetic pole, and T shape plate is that lay the paramagnetic field, play conduction, the effect of magnetic conduction and commutation.