CN2183634Y

CN2183634Y - High-voltage direct-current permanent small and special electric machine

Info

Publication number: CN2183634Y
Application number: CN 93247347
Authority: CN
Inventors: 杨芝华
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-10
Filing date: 1993-12-10
Publication date: 1994-11-23
Anticipated expiration: 2003-12-10

Abstract

The utility model belongs to the technical field of electric machines, particularly a high-voltage direct-current permanent magnetic small and special electric machine. A three-groove structure is mostly used in the prior art for obtaining direct-current high-voltage driving, and accordingly, a resistance-capacitance absorbing network is increased to reduce spark grades, the terminal of a coil is cross and stacked, and an enamelled wire can be easily broken down. The utility model adopts a multi-groove rotor iron core and the structure of symmetric balancing windings, and wire terminals which are directly from the inside of grooves are welded on a commutator segment. The utility model has good commutative performance.

Description

High-voltage direct-current permanent small and special electric machine

The utility model belongs to technical field of motors, is specifically related to a kind of high voltage direct current permanent magnetism small and special electric machine.

Be widely used as the small and special electric machine of driving element at present in various fields such as household electrical appliance, office equipment, miniature electric instrument, medicine equipments, it all is the dc low-voltage power supply, as 6.3V, 12V, 24V etc., 220V alternating current commonly used is through transformer step-down, rectification, and cost, volume, power consumption are all bigger.Direct battery power also commonly used in addition needs often charging, and the cost height uses also inconvenient.In fractional horse power motor series national standard, still there is not the GB of 220V permanent magnet DC motor.Along with The development in society and economy, numerous industry an urgent demand applying high voltage direct current small and special electric machines.In recent years, Japan had produced a kind of direct current micromotor to the direct commutation supply voltage of 220V alternating current, and its structure is a three-flute permanent magnetism form.Because three-flute motor commutation poor performance, spark is serious, thus adopted capacitance-resistance to absorb network (as shown in Figure 1), to reduce spark and electromagnetic interference.Because be subjected to the restriction of the small size of small and special electric machine own, require capacitor small size, high pressure resistant, cause the complete machine cost to improve, and also the higher reactance electromotive force that high rotating speed produced of small and special electric machine, still often these electric capacity are punctured, damage motor.In addition, the direct current machine on the present market, its armature rotor winding adopts unidirectional lap wound (as shown in Figure 4), and the terminal of coil welds (as shown in Figure 3) with commutator segment again after axle twines several circles, and the end of a thread line tail easily bumps together.The motor repair shop often finds that this winding method overlaps because of the end of a thread line tail, and the enamelled coating between the enamelled wire is breakdown, causes the armature puncture short, damages motor.

The purpose of this utility model, providing a kind ofly specifically has:

Need not resistance-capacitance network and commutation ability is good;

It is high that armature winding is withstand voltage;

Low cost, long-life;

With grid alternating current after rectification directly the power supply novel high-pressure DC permanent magnet small and special electric machine.

This high voltage direct current permanent magnetism small and special electric machine includes a watt type magnet steel, rotor, and characteristics of the present utility model are: grid alternating current is directly connected with the brush of commutator after rectification; Rotor adopts multi-groove structure, and especially effect is better under the situation of 6～14 groove numbers.Armature coil symmetrical balance coiling in the rotor, the termination of each coil directly goes out to be welded on the commutator segment in groove.

Above-mentioned rectification circuit adopts the bridge-type best results.

The utility model is owing to the employing multi-groove structure, and balanced, symmetrical coiling armature winding, makes the armature copper factor improve, and has reduced reactance electromotive force and equivalence than the leakage field importing, thereby has obviously improved commutation ability.Through actual measurement, the commutator grade of spark absorbs network below 1 1/4 thereby exempted capacitance-resistance, has reduced production cost, has improved job stability.In addition, because the termination of armature coil directly goes out to be welded on the commutator segment in groove, each the end of a thread line tail does not overlap mutually, therefore the motor withstand voltage properties is obviously improved, and has prolonged useful life.

Owing to taked above-mentioned optimal design, internal loss reduces, and under identical volume, increases than three-flute electrical micro-machine power output, and efficient also is improved.

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

Fig. 1 is daily output three-flute structure winding diagram

Fig. 2 is the utility model winding diagram

Fig. 3 is Hong Kong electrogenesis magnetic-type construction rotor schematic diagram

Fig. 4 is an armature rotor winding structure schematic diagram shown in Figure 3

Fig. 5 is the utility model rotor schematic diagram

Fig. 6 is an armature rotor winding structure schematic diagram shown in Figure 5

Fig. 7 is the utility model rotor cross-section structural representation

With reference to Fig. 1, Fig. 2.The 220V alternating current directly is connected to brush 1 behind D1～D4 bridge rectifier, epitrochanterian commutator segment 2 constantly obtains DC power supply from brush 1 in rotation.Can see that the utility model has been removed capacitance-resistance from and absorbed network, avoid the increase cost that brings because of electric capacity, easily problem such as puncture.

From Fig. 3, Fig. 4 as can be seen, the rotor of the electromagnetic motor (SUPE MOTOR.H.K) that produce in Hong Kong, unidirectional lap winding is adopted in its coiling, the termination of the armature coil 3 in the rotor core 4 all is to be soldered on the commutator segment 2 behind several circles of axle earlier again, cause each coil end to overlap mutually, the enamelled coating of enamelled wire is under high pressure very easily breakdown.

Fig. 5, Fig. 6 have represented the symmetrical balance winding structure that the utility model adopted.The rotor core 4 of present embodiment is 10 flute profile formulas, each coil 3 embeds iron core 4 every 3 grooves, per two parallel embeddings of coil, like this, the termination that can make each coil 3 straight parallel in the groove attaches on the corresponding commutator segment 2, thereby has avoided the cross layered phenomenon of line end.

Fig. 7 is the cross section of another embodiment of the utility model (12 groove), correspondence is equipped with a pair of tile-shaped magnet steel 6 in the iron-clad 5, to produce excitatory function, its Distribution of Magnetic Field owing to adopted multi-groove structure, can strengthen rotor balancing shown in arrow among the figure, reduce the reactance electromotive force, reduce internal loss, thereby improved electric efficiency, reduced grade of spark.

Claims

1, a kind of high voltage direct current permanent magnetism small and special electric machine, comprise tile-shaped magnet steel, rotor, it is characterized in that grid alternating current directly connects with commutator brush behind bridge rectifier, the rotor number is 6～14, armature coil symmetrical balance coiling in the groove, the termination of each coil directly goes out to be welded on the commutator segment in groove.

2, high voltage direct current permanent magnetism small and special electric machine as claimed in claim 1 is characterized in that groove number best results in the time of 10～12 of rotor.