CN1192602A - Winding for pulsation loading and energy saving asynchronous motor - Google Patents

Abstract

An energy-saving asynchronous motor relates to a kind of energy-saving asynchronous motor winding and energy-saving dynamo. It can resolve the problem that non-load or light-load power factor is low, and have non-load current-limiting starting function. It consists of stator, winding and rotor, and accords with the standard power grade and installation size of international electrician committee (IEC). The varieties include energy-saving dynamo used for oil-field beam-pumping unit, energy saving asynchronous motor used for general machine tool or AC two-speed elevator. The main advantages are: save energy by a big margin, need not any additive device investment for energy saving function of the motor itself, not to have pollution for electric-network like power or electronic device.

Description

The pulsation loading and energy saving asynchronous motor winding

The design relates to a kind of asynchronous machine winding.

Asynchronous machine energy-conservation proposed a lot of well-known process, belonging to downgrade has the star angle to change, add methods such as reactor, power electronics in the platen press, the electric capacity that adds commonly used improves power factor, but these methods have different shortcomings, as investing with optional equipment, power electronic equipment pollutes electrical network, and the conversion of star angle has outage point etc.

The design's order ground is: 1: propose a kind of asynchronous machine winding that has power saving function and unloaded current limit starting function simultaneously, 2: design a kind of pulsating load lathe energy-saving asynchronous motor, 3: propose a kind of AC double-speed elevator energy-saving electric machine, 4: propose a kind of oil field beam-pumping unit energy-saving asynchronous motor.

The design's task is existing like this,

1: in the asynchronous motor stator iron core slot, be embedded with the winding segments that several occupy part groove number, promptly whole winding is divided into several independently winding segments, each winding segments is multitudinous utmost point formula winding, the resistance value of each winding segments and applied voltage match and make its electromagnetic load within permissible range, and each winding segments just can insert power supply separately motor is normally moved like this; When zero load or underloading, only insert one or two winding segments, has only corresponding magnetic circuit section by excitatory and reduced exciting curent, improve power factor and reduced loss, reached energy-conservation order ground, simultaneously again because the magnetic line of force of the magnetic circuit section of work presses to not work magnetic circuit section, it is close and energy-conservation to have reduced magnetic, and it is energy-conservation that low magnetic density can also fall in the conversion of the alternate star of each winding segments angle itself; Can insert the winding segments collaborative work of respective numbers when load is big again, can remain under the high power factor operation and reach energy-conservation order ground; When starting under no load, insert a winding segments earlier, progressively insert remaining winding segments after the rotation again, can reach the order ground of current limit starting

2: the pulsating load lathe is the asynchronous motor that is used for plant equipment such as lathe with energy-saving asynchronous motor, and by the stator stator winding, the technical scheme on its energy-conservation order ground and the design's technical scheme 5.1 are described in full accord; Magnetic slot-seal has the close energy-conservation effect of the average magnetic of air gap of reduction.

3: technical scheme and this meter technical scheme 5.1 of motor high speed winding of energy-conservation step of alternating-current electrical lift are described in full accord; Its at a slow speed winding be because of it is that two three phase windings all have phase shift on space time, after outage, because residue inertia kinetic energy produces a reverse curl field, produce brake torque, improved and subtracted acceleration, can realize zero-speed bag lock, improved the langding accuracy and the comfort of elevator.

4: beam-pumping unit is in full accord with energy-saving technical scheme and the design's technical scheme 5.1 of energy-saving asynchronous motor, at the magnetic conductor between rotor end ring and the rotor punching in when starting, by sliver current-induced eddy current, produce additional torque and play constant torque.

1: the principle of the energy-conservation winding of pulsating load asynchronous motor elaborates in the design's technical scheme 5.1, as can be seen, the design's advantage is with the conversion of star angle and adds the reactance voltage drop method, the power electronics voltage drop method adds capacitance method, bi-motor methods etc. relatively, has high energy-conservation amplitude, the part of having only former exciting curent when cause only inserts a winding segments, be minimum be percent 50, as in the winding segments during with the conversion of angle star, the electric energy that is consumed is that these two marks are long-pending, and the pulse current that can save nearly percent 75 large power power electronic appliances of excitatory electricity is right, and electrical network has serious pollution.

Be again energy-conservation be the function of motor windings itself, rather than use additional equipment, invest little, constancy of volume, taking up space has unloaded current limit starting function for a short time, its advantage is the power failure when not having the conversion of star angle.

Therefore the design has overcome the past the habitual prejudice of winding overall operation, and the method that proposes winding segments structure and partition running obtains the energy-saving effect of saving exciting curent significantly, therefore than the past technology obvious improvement is arranged.

2: the pulsating load lathe is in full accord with beneficial effect and the design's beneficial effect 6.1 of energy-saving asynchronous motor, so can save much electricity because of lathe accounts for certain ratio the idle time of lathe when not having feed; Magnetic slot-seal has reduced the close loss of the average magnetic of air gap, balanced magnetic resistance; This motor technology is a significant progress from the above.

3: beneficial effect and the design's beneficial effect 6.1 of the high speed winding of alternating-current electrical lift energy-saving asynchronous motor are in full accord; The low speed winding is as described in the technical scheme 5.3, can greatly improve than the langding accuracy of past elevator, can realize the zero-speed band-type brake, improved comfort, and this is the new function that motor increases, and this motor technology has obvious improvement.

4: beneficial effect and the design's beneficial effect 6.1 of oil field beam-pumping unit energy-saving asynchronous motor are in full accord, from principle because beam-pumping unit piston 46 relies on gravity to overcome frictional resistance when descending oil well, motor only need replenish small amount of electrical energy and insert a winding segments, and unloaded exciting curent can be saved and reach percent 75; Will insert an amount of winding segments 112 again by load capacity during piston stroking upward, then motor can move under High Power Factor, magnetic conductor is excitatory by sliver electric current institute, eddy current generation additional torque makes starting torque constant during starting, a big plane No. motor be need not select, exciting curent and loss further reduced; Than the conversion of star angle, add the reactance step-down by above-mentioned visible this motor, the power electronics step-down, the beam-pumping unit motor that energy-conservation method such as bi-motor is energy-conservation, technology has obvious improvement.

Below in conjunction with attached circle and specific embodiments this motor is described in further detail.

Fig. 1: pulsating load asynchronous motor winding.

Fig. 2: pulsating load dish type asynchronous machine winding.

Fig. 3: the pulsating load lathe is with the energy-conservation asynchronous motor of using.

Fig. 4: alternating-current electrical lift energy-saving asynchronous motor

Fig. 5: the alternating-current electrical lift asynchronous motor is winding at a slow speed.

Fig. 6: oil field beam-pumping unit energy-saving asynchronous motor.

Fig. 7: oil pumper schematic diagram.

Embodiment 1: the pulsation loading and energy saving asynchronous motor winding sees that Fig. 1 is three winding segments of 6 utmost points, Fig. 2 is 6 utmost point disc-type machine winding segments, every the two poles of the earth constitute a winding segments 112, adopt the multitudinous extremely concentric or multitudinous utmost point formula winding that changes, each winding segments 112 has one group of lead-out wire 113, and alternate in the winding segments is that angle or star link; During 2P=6, three phase windings, the utmost point are organized number=9 mutually, be divided into three winding segments, 1: when the Z=36 groove, every group of coil number etc. 2, pole span=6 (1-7) Y1=(1-6) Y2=(1-8,) every group of coil number=4 when the Z=72 groove, pole span=12 (1-13), Y1=(1-10), Y2=(1-12), Y3=(1-14), Y4=(1-16); During 2P=4, be divided into two winding segments; During 2P=8, be divided into 4 winding segments; To other numbers of poles, the number of phases can be implemented with above-mentioned principle method; Can insert the winding segments 112 of varying numbers with lead-out wire 113 according to the size of load, insert a winding segments 112 earlier during unloaded current limit starting, then progressively insert whole winding segments again.

Embodiment 2: pulsating load lathe energy-saving asynchronous motor, see Fig. 1 Fig. 3: and by stator 1, stator winding 11, rotor 2, magnetic slot-seal 17 is formed, and its stator winding 11 structures are seen embodiment 1, Fig. 1 Fig. 2; Using method is: unloaded as clamp dry run such as workpiece withdrawing or underloading etc. and insert a winding segments 112 when lathe, when cutting, insert an amount of winding segments 112 by load capacity.

Embodiment 3: the AC double-speed elevator energy-saving asynchronous motor, see Fig. 1, Fig. 2, Fig. 4, Fig. 5 is by stator 1, the explanation of the structure of 6 hypervelocity windings 11 sees that embodiment 1,24 utmost point low speed winding 114 holds 118 winding 116 by winding 115 and crosstalk and forms, and the two has phase angle difference in the space; 6 hypervelocity winding usages are hour only to insert one or two winding segments 112 when elevator load; 24 utmost point low speed windings 114 are made up of the winding 116 of winding 115 and crosstalk appearance 118, produce electromagnetic braking moment when elevator cuts off the power supply, and improve langding accuracy; Its rotor 2 is a double-cage rotor.

Embodiment 4: beam-pumping unit is seen Fig. 1 Fig. 6 Fig. 7 with energy-saving asynchronous motor, by stator 1, winding 11 is made up of winding 112, its structure is seen embodiment 1, between rotor end ring 22 and rotor 2 iron cores, magnetic conductor 23 is arranged, the using method of winding segments 112 is when piston 46 because action of gravity only inserts a winding segments 112 when descending, inserts whole winding segments 112 when piston 46 is up.

Claims (4)

1: the energy-conservation winding of pulsating load asynchronous motor, form by the winding that is embedded in stator [1] groove, its special characteristic is: whole winding is made up of the winding segments [112] that several occupy part groove number, each winding segments [112] possesses independent lead-out wire [113], the resistance value of each winding segments [43] and add load voltage value and match and make electromagnetic load within permissible range, winding segments [43] is multitudinous utmost point winding

2: pulsating load lathe energy-saving asynchronous motor is the energy-saving asynchronous motor that is used for plant equipment such as lathe, by stator [1], and stator winding [11], magnetic slot-seal [17], rotor [2] is formed, and it is characterized in that: consistent with the special characteristic of claim 1

3: the alternating-current electrical lift energy-saving asynchronous motor, it is double speed alternating-current electrical lift asynchronous motor, by stator [1], high speed winding [11], flat bed winding [114] at a slow speed, double-cage rotor [2] is formed, its special characteristic is: high speed winding [11], identical with the special characteristic of claim 1, low speed winding [114] holds [118] winding [116] by three phase windings [115] and three-phase crosstalk and forms, and the two has phase angle to move in the space

4: oil field beam-pumping unit energy-saving asynchronous motor is the energy-saving asynchronous motor with constant starting torque, stator [1], rotor [2], and the magnetic anomaly body [23] between rotor end ring [22] and rotor punching, magnetic slot-seal [17] is formed, and special characteristic is: consistent with the special characteristic of claim 1

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