CN2158595Y

CN2158595Y - Speed-adjusting device for pump motor

Info

Publication number: CN2158595Y
Application number: CN93211929U
Authority: CN
Inventors: 赖宣芹
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-06
Filing date: 1993-05-06
Publication date: 1994-03-09
Anticipated expiration: 2003-05-06

Abstract

The utility model relates to an analog operation speed regulator with a water pump electric machine rotor connected with bidirectional controlled silicon in parallel which is a matching device for feed water and draining electromechanical equipment in industrial and civil architecture. The speed regulator method of the existing water pump electrical machines has the disadvantages of complicated structure and the theory of tie line of the device, low reliability, high cost and low efficiency. Each input end of the controlled silicon or controlled silicon in antiparallel connection is connected with corresponding output end of the electric machine rotor loop. The controlled silicon is connected in the shape of 'Y' or triangle and each control pole of the controlled silicon is connected with each output end of the control loop. The analog operation speed regulator with a water pump electric machine rotor connected with bidirectional controlled silicon in parallel has the advantages of simple structure, simple theory of tie line, low cost, reliability, high efficiency and energy saving and is a matching device for feed water and draining equipment with high art content, wide practicability and strong vitality.

Description

Speed-adjusting device for pump motor

The pump motor rotor also connects bidirectional triode thyristor simulation trial speed regulator, is industrial building water supply and drainage electromechanical equipment technical field.It by control and pump motor rotor mutually and the angle of flow of the bidirectional triode thyristor that connects, change the size of current and the revolutional slip of pump motor rotor, reach the rotating speed that changes rotor, make it to operate in high efficient area, realize the optimal control of high efficiency and low energy consumption.

Known to the inventor, existing pump speed control method has: (1) controllable silicon tandem inversion speed-governing; (2) frequency control; (3) fluid coupling speed governing; (4) rotor series resistance speed.Use first three to plant the speed regulator that speed control principle constitutes, its principle tie lines and complex structure, low, the high speed regulator that constitutes according to the 4th kind of principle of cost of reliability, though tie lines and relatively simple for structure, because the resistance consumption electric energy of serial connection makes its efficient reduce by 5～15%.In view of this, the inventor proposes " pump motor controllable silicon tandem simulation trial automatic stepless speed-regulating energy saver " respectively the end of the eighties and the beginning of the nineties, (this project is the national key scientific research projects that State Planning Commission assigns by the Ministry of Construction, presided over by science and technology office of the Ministry of Construction and be tested and appraised in April, 1985, its achievement registration number: 840702, and enroll " Chinese technological achievement complete works " 1987～1,988 first), " pump motor controllable silicon rotor string water resistance simulates computing automatic stepless speed-regulating energy saver " technical scheme through Hubei Province Patent Administration Bureau and Hubei Province research institute of scientific-technical information to domestic and international patent and off-patent WPI storehouse, the COM of U.S. DIALO international online systems, DENDEX, ISMEL, PASCAL, NTIS, literary compositions such as SSIE retaining is retrieved, the document that is retrieved reaches 3,110,000 pieces, does not all find and the identical or akin report of above-mentioned two technical schemes.But these technical schemes can not overcome the existing problem of pump motor speed adjusting technique fully.Thereby, further impel the inventor to go the method for seeking to address these problems, starting point of the present invention that Here it is.

The purpose of this utility model is to design a kind of principle tie lines and novel pump motor speed regulator simple in structure, that reliability is high, cost is low and efficient is high, to replace speed regulating device commonly used at present.

Design philosophy of the present utility model is, with bidirectional triode thyristor or inverse parallel controllable silicon, substituted metal resistance and liquid resistance, being about to pump motor rotor loop three-phase output end is connected with bidirectional triode thyristor or inverse parallel silicon controlled three-phase input end, and the latter's three-phase input end is the connection of " Y " or " △ " shape, its each control utmost point is connected with corresponding each output in controller loop respectively, it is a size of controlling the bidirectional triode thyristor or the inverse parallel silicon controlled angle of flow by the controllable silicon phase-shift pulse in the controller, make that induced current numerical value produces corresponding the variation in the rotor loop of pump motor, realize control speed.As everyone knows, the controllable silicon conduction resistance value is very little, thereby reaches the purpose of low-loss speed governing.Make it to operate in best operating state.

Below in conjunction with embodiment, the utility model is further described:

Fig. 1 be pump motor rotor and a kind of embodiment that connects the bidirectional triode thyristor speed regulator wherein: the 1-controller; 2-inverse parallel controllable silicon; 3-pump motor rotor; 4-pump motor stator; The 1JC-power contactor; 2JC-rotor short circuit contactor; 3JC-is quick resistance contactor frequently; The PB-frequency sensitive resistor; The DK-protection switch.In addition,

Expression exchanges;

The expression three-phase electricity.As shown in Figure 1, bidirectional triode thyristor or inverse parallel controllable silicon 2 have been inserted between pump motor rotor 3 and the controller 1.The output of its input and pump motor rotor 3, contactor 2JC, 3JC are in parallel, and the silicon controlled input is " Y " shape and connects.Each control utmost point of bidirectional triode thyristor or inverse parallel controllable silicon 2 is connected with each control corresponding utmost point of controller respectively.Controller 1 is made of input control order transmitter, control contrast transducer, water pump operation mode analog operating unit and phase shift trigger.The course of work of speed regulator is as follows: when initial state, rotor short circuit contactor 2JC disconnects.By control manually, power contactor 1JC and frequently quick resistance contactor 3JC are connected, then pump motor starts.When motor reaches rated speed, then quick resistance contactor 3JC automatic disconnection frequently, meanwhile, phase modulated pulse by controller 1 output adds to inverse parallel controllable silicon 2, make it conducting, device is in the running status that can implement speed governing, the reflection water level, the signal of telecommunication control command of information such as lift and flow, through the contrast conversion, with the operational mode Mathematical Modeling, as constant peak efficiency operational mode, constant flow rate high efficient area operational mode, constant pressure high efficient area operational mode, and constant water level high efficient area operational mode etc., after manual operation simulation computing, analog signal voltage is passed to phase shift trigger, remove to control the inverse parallel silicon controlled angle of flow with its output phase-modulated pulse, the electric current and the revolutional slip thereof of pump motor rotor be can change, thereby pump motor automatic stepless speed-regulating and manual governing realized.This speed adjustable range is: 0～100%; Capacity motor is: 50～1500 kilowatts (winding motor); Power saving rate can reach: 10～20%.

Compare with existing pump motor arrangements for speed regulation, the utlity model has following advantage and benefit:

(1) principle tie lines and simple in structure has reduced the production cost of product. Compare with existing speed regulator, the utility model has been saved the components and parts such as silicon rectification bridge, thyristor inversion bridge, reactor and contravariant transformer. So structure is greatly simplified, the prediction product cost can reduce by 50～70%.

(2) along with the minimizing of components and parts and the simplification of structure, the reliability of device must improve.

(3) with the controllable silicon substituted metal resistance and the liquid resistance of no power consumption, and adopt the simulation trial automatic stepless speed-regulating, make device be in optimum operating condition, can economize on electricity 10～20%.

The utility model is as the support device of water supply and drainage electromechanical equipment of industry, civil buildings, is possess skills content height, practicality is wide, vitality is strong product.

Claims

1, a kind of pump motor rotor that is made of pump motor and controller and connect bidirectional triode thyristor simulation trial speed regulator is characterized in that:

(1) bidirectional triode thyristor or the inverse parallel silicon controlled three-phase input end output corresponding with the pump motor rotor loop are connected;

(2) bidirectional triode thyristor or inverse parallel silicon controlled three-phase input end are " Y " shape or the connection of " △ " shape;

(3) each control utmost point of bidirectional triode thyristor or inverse parallel silicon controlled is connected with corresponding each output of controller respectively.