CN2746644Y

CN2746644Y - High-efficient energy-saving three-phase asynchronous motor

Info

Publication number: CN2746644Y
Application number: CN 200420062368
Authority: CN
Inventors: 项怀余; 王荷芬
Original assignee: Jiangsu Dazhong Electric Motor Co ltd
Current assignee: Jiangsu Dazhong Electric Motor Co ltd
Priority date: 2004-06-30
Filing date: 2004-06-30
Publication date: 2005-12-14
Anticipated expiration: 2014-06-30

Abstract

The utility model relates to a three-phase asynchronous motor, in particular to a high-efficient energy-saving three-phase asynchronous motor used for the oil field pumping unit. The high-efficient energy-saving three-phase asynchronous motor is composed of a plurality of windings. The utility model converts the needed number of turns by the required power PN, 0. 8PN and 0. 6PN, and forms a triangle connection or a star connection to obtain three power gears, and selects the power gear according to the amount of the oil in the oil well, and therefore reaches the effect of electricity-saving.

Description

The high-efficiency and energy-saving type threephase asynchronous

Technical field: the utility model relates to a kind of threephase asynchronous, particularly relates to a kind of high-efficiency and energy-saving type threephase asynchronous that uses on the oil-field oil pumper that is used in.

Technical background: according to the relevant Searches of Patent Literature, widely used motor generally is standard electromotor on the oil pumper in China oil field now, oil mass in the oil well (load) reduces gradually along with the continuous extraction of oil pumper, this moment, electric motor driven oil production machine need not be with the few oil of the foot horsepower amount of extraction, and this moment is because the motor of oil pumper is rated power, often cause a large amount of wastes of efficiency, low load with strong power, the production cost of enterprise is increased considerably, in order to overcome above defective, the utility model provides a kind of high-efficiency and energy-saving type threephase asynchronous.

Summary of the invention: the purpose of this utility model will provide a kind of high-efficiency and energy-saving type threephase asynchronous exactly.The purpose of this utility model is achieved in that high-efficiency and energy-saving type three different motor are made up of many groups winding, and rotating speed is generally 6,8 utmost points, and (synchronous speed is 6P:1000r/min when being 380V, 50Hz, 8P:750r/min; Synchronous speed is 6P:1200r/min when 460V, 60Hz, 8P:900r/min), it is characterized in that: in the design process stator winding multi-channel parallel of 6,8 utmost point motors of former same specification connect and change 1 tunnel parallel connection method into, and 6 lead-in wires end to end of every phase winding are that triangle connects into; Utilize power of electric motor to be directly proportional again with voltage squared, the principle that voltage and every number of wire turns mutually are directly proportional, the number of wire turns of the every phase of reasonable distribution is pressed 0.8P with every number of wire turns in mutually _NRatio is calculated, get a part of wire turn and throw away and make star connection, another wire turn is made triangle and is connected, and middle every each the end of a thread that extracts is mutually drawn, totally 9 the end of a thread of the lead-in wire of this moment head and tail of former every phase wire turn and extraction is combined into the big delta-connection of little star, satisfies selected 0.8P _NPower requirement; For 0.6P _NComputational methods and 0.8P _NThe same, just at every 0.6P that presses mutually _NRespectively take out a end of a thread again and draw at the wire turn coupling place of calculating, and these 9 the end of a thread are combined into the connection of a little triangle of big star, 0.6P _NThe requirement of power.Whole motor is for two power grade requirements, have 9 the end of a thread, requirement to three power grades, have 12 the end of a thread, enter on the terminal block of the special big terminal box of motor, the user only needs 9 the end of a thread or 12 the end of a thread are introduced electric cabinet, how much change according to oil production and to select for use, can realize energy saving effect, and the motor operation is normal, motor is at 0.8P _NAnd 0.6P _NDuring operation, its efficient, power factor, rotating speed and starting torque multiple are close when moving with the normal bringing onto load of reference power basically.

Description of drawings:

Fig. 1 is the basic input power P of the utility model three power shelves _NWinding diagram

Fig. 2 is the utility model three power shelves power output 0.8P _NWinding diagram

Fig. 3 is the utility model three power shelves power output 0.6P _NWinding diagram

U1-U2 among Fig. 1, V1-V2, W1-W2 coil are 120 circles

U1-U5 among Fig. 2, V1-V5, W1-W5 coil are 18 circles

U5-U2, V5-V2, W5-W2 coil are 102 circles

U1-U6 among Fig. 3, V1-V6, W1-W6 coil are 46 circles

U6-U2, V6-V2, W6-W2 coil are 74 circles

Embodiment: the utility model is described in further detail below in conjunction with accompanying drawing

In the drawings, the utility model high-efficiency and energy-saving type threephase asynchronous is made up of many groups winding, it is characterized in that: the stator winding multi-channel parallel of 6,8 utmost point motors of former same specification is connect change 1 tunnel parallel connection method into, and 6 lead-in wires end to end of every phase winding are that triangle connects; Calculate 0.8P _NGet 18 circle wire turns and throw away and make star connection, other 102 circle wire turns are made triangle and are connected (as shown in Figure 2); Calculate 0.6P _NGet 46 circle wire turns and throw away and make star connection, other 74 circle wire turns are made triangle and are connected (as shown in Figure 3); During concrete enforcement, whole motor can be divided into three power grade work (37.5KW, 30KW, 22.5KW), has 12 the end of a thread, inserts electric cabinet, can be according to the use of how much selecting of oil production.Motor of the utility model can be equivalent to three motors, has splendid price ratio, is carrying out particular design, the basic power output P of three power shelves on Y or the Y2 series threephase asynchronous basis now _N, 0.8P _N, 0.6P _N,, thereby reach the effect of economize on electricity mainly according to the power grade of how much selecting of oil mass in the oil well.

Claims

1, the high-efficiency and energy-saving type threephase asynchronous is made up of many groups winding, it is characterized in that: 6, the stator winding multichannel of 8 utmost point motors is designed to 1 the tunnel and is connected in parallel, and 6 lead design end to end of every phase winding are that triangle connects.

2, high-efficiency and energy-saving type threephase asynchronous according to claim 1 is characterized in that: calculate 0.8P _NGet 18 circle wire turns and throw away and do Y-connection, other 102 circle wire turns are made triangle and are connected; Calculate 0.6P _NGet 46 circle wire turns and throw away and do Y-connection, other 74 circle wire turns are made triangle and are connected.