CN201972907U

CN201972907U - Variable frequency control device of water pump

Info

Publication number: CN201972907U
Application number: CN2010206553068U
Authority: CN
Inventors: 王海平
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-13
Filing date: 2010-12-13
Publication date: 2011-09-14
Anticipated expiration: 2020-12-13

Abstract

A variable frequency control device of a water pump consists of a main circuit adjusting part and a protective control part; the main circuit adjusting control part consists of input ends (L1, L2, L3), an ampere meter A, a main power supply circuit breaker QF, a binding post, a kilowatt-hour meter, a frequency converter and a main motor M of the water pump; the protective control part is connected on a main circuit, can be controlled within a rated current, ensures the high torque output (heavy-duty starting) of the motor and meets the starting requirements of an electric motor at various working conditions; and the whole starting process is stable, safe and quiet and completely eliminates the impact of electric currents on a power grid, the electric motor and equipment. Due to the control device, the input voltage of a fan can be adjusted according to the load variation of the water pump, the electric currents of the water pump can be forcibly reduced, and the high-efficiency running of the electric motor can be ensured, and the electrical energy can be saved by more than 30%.

Description

A kind of pump variable frequency control gear

Technical field

The utility model relates to electromechanical power control field, particularly a kind of pump variable frequency control gear.

Background technique

Water pump has crucial effect in mine operation, pump control unit in the past, what adopt is reduced-voltage starting, impulse ratio to whole electrical network is bigger, and starting time is longer, whole device does not have speed-regulating function yet, the motor major part is in the constant-speed operation state, and with plate washer, the way that valve or emptying reflux is carried out the adjusting of flow or pressure, can not make suitable adjusting at different demands, has caused waste of power resources, increased cost, if and had contingency to take place at work, the power down road of must in time breaking would prevent the damage of water pump and bigger property safety loss.

Summary of the invention

The purpose of this utility model is exactly to be to overcome above-mentioned deficiency of the prior art and a kind of novel pump variable frequency control gear that can effectively regulate and that have automatic safety device is provided.

For achieving the above object, the utility model is to adopt following scheme to be achieved in that the pump variable frequency control gear is regulated part by main circuit and the protection control section is formed, and it is characterized in that: regulate control section and be made up of input end (L1, L2, L3), ammeter A, primary power supply circuit breaker Q F, tenminal block, watt hour meter, frequency variator, pump motor M; Wherein input end (L1, L2, L3) is gone up the L1 end and is connected to primary power supply circuit breaker Q F, ammeter A is connected on the input end by current transformer BH, input end three ends are connected to three input ports of R, S, T of frequency variator at last, tenminal block is connected in parallel on the main circuit of input end (L1, L2, L3), watt hour meter is connected with tenminal block, and PE holds ground connection; The motor M of water pump is connected three output terminals of U, V, W of frequency variator; The protection control section is by L4, L5 is connected on the main circuit, voltmeter V is connected in parallel on the circuit, be connected in parallel on the circuit after operation control contactor KM1 and the run indicator WS1 series connection, stop control contactor KM2 and stop to be connected in parallel on the circuit after tutorial light WS2 connects, Fault Control relay K A2 be connected in parallel on the circuit after fault indicating lamp WS3 connects, water pump control relay KA1 be connected in parallel on the circuit after water pump contactor KF connects, stop button SB1, start button SB2 be connected in parallel on the circuit protective tube R1 after starting contactor KM connects, R2 is connected to the circuit two ends; The protection control section is connected on the frequency variator; wherein starting contactor KM is connected the FWD end of frequency variator; push-button switch SB0 is connected frequency variator SS (RST) end; contactor KM links to each other by frequency variator COM end with push-button switch SB0; water pump control relay KA1 is connected frequency variator SP1 end; Fault Control relay K A2 is connected frequency variator SP2 end, and links to each other with KA1 by frequency variator 24V end.

The utility model advantage:

1, the utility model pump variable frequency control gear can satisfy the startup needs of motor under the various operating conditions in rated current with interior and assurance motor high torque (HT) output (heavy load starting).Whole starting process steadily, safety, peace and quiet, eliminated the impact of electric current fully to electrical network, motor and equipment.

2, the utility model is provided with the automatic tracking and matching of motion vector system, can force to reduce the water pump electric current and also guarantee that motor efficiently moves according to the input voltage of the load variations rapid adjustment blower fan of water pump, can save electric energy more than 30%.

3, the utility model is provided with protective gear, runs into unusual automatic outage, and the effective safety of protective circuit and disintegrator has prolonged working life of water pump greatly.

Description of drawings

Fig. 1 is the utility model main circuit regulating circuit schematic representation

Fig. 2 is the utility model protection control circuit schematic representation

Fig. 3 is the utility model structural representation

Embodiment

As Fig. 1, Fig. 2, shown in Figure 3, input end (L1, L2, L3) input 380V Ac, press start button SB2 during work, primary power supply circuit breaker Q F closes, water pump control relay KA1, starting contactor KM and water pump contactor KF closure, the motor M startup work of water pump, operation control contactor KM1 closure, run indicator WS1 lights, ammeter A is used for the surveying work electric current, watt hour meter is used for the surveying work consumed power, can make suitable adjustment to different demands by regulating the speed that frequency variator is regulated water pump in the work; Press stop button SB1 when quitting work, circuit disconnects, and water pump quits work, and stops control contactor KM2 closure, stops tutorial light WS2 and lights; When running into fault, Fault Control relay K A2 closure, pump motor M quits work, and fault indicating lamp WS3 lights.

Claims

1. water pump machine frequency-converting control device, regulate part and protect control section to form by main circuit, it is characterized in that: main circuit adjusting part input end (L1), (L2), (L3) go up (L1) end and are connected to primary power supply circuit breaker (QF), ammeter (A) is connected on the input end by current transformer BH, input end three ends are connected to three input ports of (R), (S), (T) of frequency variator at last, tenminal block is connected in parallel on the main circuit of input end (L1), (L2), (L3), watt hour meter is connected with tenminal block, (PE) end ground connection; The motor of water pump (M) is connected three output terminals of (U), (V), (W) of frequency variator; The protection control section is by (L4), (L5) be connected on the main circuit, voltmeter (V) is connected in parallel on the circuit, be connected in parallel on the circuit after operation control contactor (KM1) and run indicator (WS1) series connection, stop control contactor (KM2) and stop to be connected in parallel on the circuit after tutorial light (WS2) is connected, Fault Control relay (KA2) be connected in parallel on the circuit after fault indicating lamp (WS3) is connected, water pump control relay (KA1) be connected in parallel on the circuit after water pump contactor (KF) is connected, stop button (SB1), start button (SB2) be connected in parallel on the circuit protective tube (R1) after starting contactor (KM) is connected, (R2) be connected to the circuit two ends; The protection control section is connected on the frequency variator; wherein starting contactor (KM) is connected (FWD) end of frequency variator; push-button switch (SB0) is connected (RST) end of frequency variator (S3); contactor (KM) links to each other by frequency variator (COM) end with push-button switch (SB0); water pump control relay (KA1) is connected frequency variator (SP1) end; Fault Control relay (KA2) is connected frequency variator (SP2) end, and links to each other with (KA1) by frequency variator (24V) end.