CN2342515Y - Ringless brushless startor for winding rotor motor - Google Patents

Abstract

The utility model relates to a ringless brushless starter for winding rotor asynchronous motors. The starter is characterized in that a shaft sleeve and a motor rotating shaft are connected to form linkage, the shaft sleeve is fixedly provided with an annular front and a rear yoke plates, and a plurality of coil windings and a plurality of binding posts are fixed between the front and the rear yoke plates. The outlet terminals of motor rotor windings, which lead out of the central hole of the rotating shaft, is directly fixedly connected with the binding posts. The joint of the other terminal of each binding post is connected with the coils in two adjacent coil windings. A coil winding device is composed of a coil, an inner iron core, and an outer iron core, wherein, a gap is arranged between the inner and the outer iron cores, and the coil is arranged on the outer iron core. The ringless brushless starter for winding rotor asynchronous motors adopts the comprehensive parameters of iron loss, copper loss, and air gap loss to limit starting current to ensure the all performance characteristics of the motor unchanged. The ringless brushless starter for winding rotor asynchronous motors can be continuously started, and the forward rotation and reverse rotation can not be affected.

Description

The acyclic started with no brush device of wound rotor motor

The utility model is about a kind of starter of wound-rotor asynchronous motor.

Drop into the wound-rotor asynchronous motor of industry operation now; all adopt frequency sensitive trheostat to limit starting current; in order to reach this purpose; consumable accessory such as A.C. contactor in slip ring, carbon brush, brush box, brush box support, short-circuit device and the control cabinet, the time relay and frequency sensitive trheostat also to be housed on motor rotary shaft form a secondary circuit; could guarantee the electric motor starting operation, break down and all can shut down stopping production in any position of these consumable accessorys.Frequency sensitive trheostat is to adopt the way that increases iron loss and copper loss to limit starting current; prolonged the electric motor starting time; make that the motor feels hot; its maximum defective is to start continuously; it also is like this both having made the secondary circuit protection; if start 2-3 time continuously within 5 minutes, frequency sensitive trheostat then can burn.For realize acyclic started with no brush once the someone adopt harmonic wave or vortex principle to design, but almost do not have the example of success in actual applications.

The purpose of the utility model is will overcome the deficiency that prior art exists and still adopt the frequency sensitive trheostat principle, and designs a kind of acyclic brushless wound rotor motor starter.

These starter characteristics are to be provided with axle sleeve to connect with motor rotary shaft, be fixed with circular forward and backward yoke plate on the axle sleeve, be fixed with several coil windings and binding post between the forward and backward yoke plate, the leading-out terminal of rotor winding is drawn directly from shaft central hole and is fixedlyed connected with binding post, its joint of the binding post other end is connected with coil in adjacent two coil windings, the coil windings device is by coil and interior iron core, outer iron core is formed, have the gap between the inside and outside iron core, coil places on the outer iron core.

This starter without brush and ring is the special-purpose starting equipment of wound rotor AC asynchronous motor, makes this class motor realize brushless no inscription of loop.The resistance of this starter is a variable, and it is equivalent to an equivalent impedance and seals in the loop of rotor along with the increase and decrease that is in proportion of motor rotor power frequency, utilizes motor in starting process rotor frequency f ₂It is the relationship change that raises and reduce with rotor speed.When rotor speed is raised to n by 0 ₆The time, the external resistance of rotor circuit changes to minimum (normal operation) by maximum (starting is wink just), so starting torque is bigger when starting, starting current is less, and is serially connected in for a long time on the rotor loop and can produce the eddy-current heating effect, is a kind of desirable starting equipment.Adopt iron loss, copper loss on the principle, the comprehensive parameters restriction starting current of air gap loss guarantees that all operation characteristics of motor are constant, and can start with the motor rotating all unaffected continuously.

Further illustrate the utility model below in conjunction with description of drawings, provide embodiment simultaneously.

Fig. 1 is the utility model example structure cutaway view.

Fig. 2 is the utility model embodiment elementary diagram.

Wherein: 1, binding post, 2, plain washer, 3, spring washer, 4, nut, 5, packing ring, 6, insulated ring, 7, insulating case, 8, the iron core mounting panel, 9, preceding yoke plate, 10, insulating pad, 11, outer band, 12, coil, 13, layer insulation, 14, primary insulation, 15, outer iron core, 16, interior iron core, 17, axle sleeve, 18, the back yoke plate, 19, plain washer, 20, spring washer, 21, bolt, 22, joint.

As shown in the figure, the axle sleeve 17 and the machine shaft splined of present embodiment, be fixed with on the axle sleeve 17 circular before, back yoke plate 9, be fixed with six coil windings between 18, in this coil windings is reached by coil 12, outer iron core 16,15 form, in, outer iron core 16, has the gap between 15, before interior iron core 16 is fixed on by mounting panel 8 and spiral shell select 21 thereof, back yoke plate 9, on 18, outer iron core 15 is fixed on yoke plate 9, on 18 the shoulder rank, six 1 of binding posts are fixed on the preceding yoke plate 9, leading-out terminal is drawn directly from the machine shaft centre bore and is fixedlyed connected with binding post 1 on the rotor winding, and the joint 22 of binding post 1 other end is connected with coil (12) in adjacent two coil windings.During use this acyclic started with no brush device being directly installed on former wound-rotor asynchronous motor installs in the non-shaft stretching end rotating shaft of parts such as slip ring and carbon brush.Present embodiment is compared the cable of having saved a plurality of consumable accessorys and secondary circuit with the former starters such as slip ring that have, and easy installation and removal need not be keeped in repair, simple to operate.

Claims (1)

1, the acyclic started with no brush device of a kind of wound rotor motor, it is characterized in that being provided with axle sleeve (17) connects with motor rotary shaft, be fixed with on the axle sleeve (17) circular before, back yoke plate (9,18), before, back yoke plate (9,18) be fixed with several coil windings and binding post (1) between, the leading-out terminal of rotor winding is drawn directly from shaft central hole and is fixedlyed connected with binding post (1), binding post (1) its joint of the other end (22) is connected with coil (12) in adjacent two coil windings, coil windings is by coil (12) and interior iron core (16), outer iron core (15) is formed, in, outer iron core (16,15) have the gap between, coil (12) places on the outer iron core (15).

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