CN201215099Y

CN201215099Y - Intelligent efficacy energy-conserving end device for blower fan water pump

Info

Publication number: CN201215099Y
Application number: CNU2008201047274U
Authority: CN
Inventors: 杨洪
Original assignee: Mingda Power (beijing) Energy And Technology Co Ltd
Current assignee: Mingda Power (beijing) Energy And Technology Co Ltd
Priority date: 2008-04-09
Filing date: 2008-04-09
Publication date: 2009-04-01
Anticipated expiration: 2018-04-09

Abstract

The utility model relates to an intelligential efficiency and energy-saving terminal equipment for a blower-pump, which consists of a main loop, the control loop connected with the main loop, a signal loop connected with the control loop and a display loop. The utility model has the advantages of automatically tracking work status of load through programmable technology, frequency conversion technology, the technology of tracking and adjusting power, soft start technology, dynamic power-factor compensation technology and PID closed loop control, real-time adjusting supply power and decreasing power consumption.

Description

The energy-conservation terminal equipment of blower fan water pump intelligence effect

Technical field

The utility model relates to the energy-conservation terminal equipment of a kind of intelligent effect, belongs to electronic technology and electromechanical integration field.

Background technique

Using blower fan, water pump in industrial and mining enterprise in large quantities, these machineries generally all drive with Wechselstrommotor.Wherein most of motor all is not to be operated in rated power, and often has only the 50%-70% of rated power, even lower.But the motor major part is in the constant-speed operation state, and carries out the adjusting of flow or pressure with the way that plate washer, valve or emptying reflux, thereby loses a large amount of electric energy in vain, the blower fan that power is big more, water pump, and the electric energy of loss is many more.

Summary of the invention

The purpose of this utility model is to provide a kind of blower fan water pump intelligence energy-conservation terminal equipment of effect (MD-FSL), its comprehensive Programmable Technology, converter technique, tracking Power Regulation technology, soft Starting Technology, dynamic power factor compensation technique, by the PID closed loop control, working condition from the motion tracking load, the real-time regulated output power reduces electric energy.

The energy-conservation terminal equipment of a kind of blower fan water pump intelligence effect comprises the major loop module, with major loop module control loop module that be connected, that send control signal, the signal circuit module that is connected with the control loop module with in order to the show circuit module of demonstration electricity-saving appliance state.

The energy-conservation terminal equipment of a kind of blower fan water pump intelligence effect, the major loop module of the energy-conservation terminal equipment of this blower fan water pump intelligence effect is made up of circuit breaker, contactor, input filtering device, frequency variator, output filtering device.

The control loop module of the energy-conservation terminal equipment of this blower fan water pump intelligence effect comprises miniature circuit breaker, auxiliary reclay, programmable controller (PLC), man-machine interface, button; The signal circuit module comprises spot sensor, signal transmitting device, PID controlling device; The show circuit module comprises voltmeter, ammeter, pressure (temperature, flow etc.) table, four wire three phase active electric energy meter, tutorial light.

The utility model power saving rate can reach 20%-60%, can effectively prevent mechanical wear, prolongs the life-span that motor uses, instantaneous attitude torque reflection; And adopt latest generation IGBT power model, maximum carrier frequency reaches 16kHz, quiet operation.The energy-conservation terminal equipment of a kind of blower fan water pump intelligence effect has instantaneous output voltage and adjusts function automatically, can be when there be bigger fluctuation in the input electrical network, and output voltage also remains unchanged substantially; Have functions such as the braking of rise, adapt to various applications; Its liquid crystal screen has liquid crystal character, graphic display, and the Chinese and English display mode is set at any time, man-machine interface close friend; The interactive switching controls of two keyboards, this machine, remote operation are freely selected; Protective function is perfect, and when possessing current limit, overvoltage stall protection, short circuit, overcurrent, overload, overvoltage, system all can protect immediately.

Description of drawings

Fig. 1 represents electricity-saving appliance hardware constitutional diagram;

Fig. 2 represents blast-air quantity (H-Q) characteristic of blower fan under certain rotating speed.

Embodiment

1. according to shown in Figure 1, this intelligent energy-saving electric appliance is connected, sends the control loop module of control signal, the signal circuit module that is connected with the control loop module by the major loop module, with the major loop module and in order to show the show circuit module of electricity-saving appliance state.

Wherein the major loop module is made up of the circuit breaker that is connected with power supply, the contactor that is connected with circuit breaker, the input filtering device that is connected with contactor, the frequency variator that is connected with the input filtering device, the output filtering device that is connected with frequency variator.

Wherein the control loop module is made up of the miniature circuit breaker that is connected with contactor, the auxiliary reclay that is connected with miniature breaker, the PLC that is connected with auxiliary reclay, the man-machine interface that is connected with PLC, the button that links to each other with man-machine interface.

Wherein the signal circuit module is made up of spot sensor, the signal transmitting device that is connected with spot sensor, the PID controlling device that is connected with the signal transmitting device.

And the show circuit module is made up of voltmeter, ammeter, pressure (temperature, flow etc.) table, four wire three phase active electric energy meter, tutorial light.

2. speed-regulating electricity-saving

Blower fan is to transmit gas device.Water pump is the device that transmits water or other liquid.With regard to its structure and working principle, both are basic identical.Be that example is illustrated with the blower fan earlier now.

Employing MD-FSL controls blower fan, belongs to the aerodynamic method of saving electric power of minimizing, and the method that it and general damper commonly used are controlled air quantity compares, and has tangible power savings.

By Fig. 2 its electricity principle can be described:

Among Fig. 2, curve (1) is that (characteristic of H-Q), curve (2) is a pipe network windage characteristic (full trrottle) to blast one air quantity of blower fan under constant rotational speed n1.

It is the highest to suppose that blower fan is operated in the A point efficiency, and this moment, blast was H2, and air quantity is Q1, and air horsepower N1 is directly proportional with the product of Q1, H2, and usable area AH2OQ1 represents in the drawings.If manufacturing technique requirent, air quantity need reduce to Q2 from Q1, and at this moment the method with damper is equivalent to increase resistance of pipe system, makes the resistance of pipe system characteristic change to curve (3), and system changes to new operating point B operation by original operating point A.As seen from the figure, blast increases on the contrary, and air horsepower is directly proportional with area B H1OQ2.Obviously, air horsepower descends little.If adopt the built-in VFC mode of MD-FSL, rotation speed of fan drops to n2 by n1, and according to the proportionality law of fan parameter, drawing, (characteristic of Q-H) is shown in curve (4) at rotation speed n 2 air quantity.As seen under the situation that satisfies same air quantity Q2, blast H3 reduces significantly, and power N3 is along with remarkable minimizing, and CH3OQ2 represents with area.Power △ N=(the H1-H3) * Q2 that saves, H1H3C represents with area B.Obviously, the economic effect of economize on electricity is fairly obvious.

By fluid mechanics as can be known, air quantity is directly proportional with the first power of rotating speed, square being directly proportional of blast H and rotating speed, and air horsepower N is directly proportional with the cube of rotating speed.Adopt MD-FSL to carry out speed governing, when air quantity drops to 80%, rotating speed also drops to 80%, and air horsepower N will drop to 51.2% of rated power, if air quantity drops to 60%, air horsepower N can drop to 21.6% of rated power, even also need to consider certainly because the efficient reduction that the rotating speed reduction can cause and the effectiveness affects of additional control gear etc. like this, this economize on electricity numeral also is very considerable, therefore in the machinery of blower fan water pump is housed, adopting the rotating speed control mode to regulate air quantity or flow, is effective method in economize on electricity.

In like manner, the electricity principle of water pump also can be illustrated by Fig. 2:

Being permitted the multipurposepump occasion all needs to change confluent (flow Q) under the situation of constant voltage from left figure as can be known keeping: when flow Q1 reduces to Q2 as if not changing pump rotary speed, lift will rise to the B operation point, and its power can calculate with H2*Q2, corresponding area BH20Q2.Area AHTOQ1 on the former A power of operating point Q1*HT figure, both institutes wasted work rates change little, can economize on electricity that (H2-HT), the area of figure DBH2HT promptly is the economize on electricity value to Q2*H2-Q2*HT=Q2 if we reduce rotating speed to (2).If flow fades to Q3 still with the rated speed operation for another example, power demand Q3*H1, and the waste energy is FCH1HT.

Identical pump motor output power with the blower fan electricity principle is proportional to rotating speed cube relation, carry out speed governing with MD-FSL, flow descends, and can keep constant voltage HT if rotating speed drops to 80% of rated speed, and air horsepower drops to 51.2% of rated power, flow drops to Q3, if make lift constant, can make rotating speed drop to 70% of rated speed, this moment, air horsepower was 34.3% of rating value, economize on electricity reaches 65.7%, and economic benefit is fairly obvious.

3. soft start economize on electricity

Usually induction motor adopts the method that directly inserts the electrical network starting, not only loss is big for when the starting current of motor is specified 5～7 times, impact also big to electrical network, mechanical wear, vibrate all big, if control electric motor starting with MD-FSL, starting current can be restricted under 1.2 times of rated current, the starting power consumption reduces greatly like this, neither impacts electrical network, again impulse machine not.

4. underloading voltage-reducing and electricity-saving

Any manufacturing machine that utilizes induction alternating current (AC) motor as mode of electric drive, power of electric motor is selected by maximum load phase rated load.And when work the overwhelming majority can not full load operation, motor works in full voltage, full gear degree and load is very little, also have a lot of time light runnings, can know by design of electrical motor and roadability, motor only operates in full load and is only most effective, power factor optimum, causes many unnecessary electric energy losses during underloading.MD-FSL adopts the method that detects the load size, minimizing according to load, suitably reducing stator voltage can raise the efficiency, this is because the stator current resistive component is very little when underloading, zero load, and mainly be the wattless current of excitation, so COS ￠ is very low, and what account for Main Ingredients and Appearance in the open circuit loss is the iron loss of stator full voltage, a bit do not reduce, so efficient is very low.If suitably reduce stator voltage during underloading, see motor stator induced potential formula:

U1≈E1＝4.44F1N1KN1￠m

Wherein: the every phase winding turns-in-series of U1-stator; KN1 is because underloading, stator current is very little when unloaded, can ignore the leakage impedance pressure drop of staor winding, so U1 ≈ E1, when other conditions are constant, reduce stator voltage U1, then ￠ m ratio descends, also be the also proportional decline of excitation wattless current IM, reactive component in the stator current has reduced like this, and COS ￠ has just improved, and suitably control can be near optimum value.In addition, other conditions are constant, stator iron loss: PFel=pFeIN * (U1/UIN) 2

Wherein: PFel-stator iron loss; The specified iron loss of pFeIN one stator;

The specified terminal voltage of UIN one stator.

As can be seen, along with U1 descends, PFel descends rapidly with a square ratio, and the iron loss that accounts for main loss like this when underloading, zero load reduces in a large number, and the operational efficiency of motor is improved greatly, the reason of Here it is underloading voltage-reducing and electricity-saving.

5. hoisting power factor economize on electricity

Because of MD-FSL built-in power factor compensation device, can power factor increase substantially, can save very big reactive loss like this, generally can save about 30%, behind the large capacity equipment in the enterprise, MD-FSL can increase many new equipments and not need dilatation.

Claims

1. the energy-conservation terminal equipment of blower fan water pump intelligence effect is characterized in that comprising the major loop module, with major loop module control loop module that be connected, that send control signal, the signal circuit module that is connected with the control loop module with in order to the show circuit module of demonstration electricity-saving appliance state.

2. the energy-conservation terminal equipment of blower fan water pump intelligence effect according to claim 1 is characterized in that the major loop module comprises the circuit breaker that is connected with power supply, the contactor that is connected with circuit breaker, the input filtering device that is connected with contactor, the frequency variator that is connected with the input filtering device, the output filtering device that is connected with frequency variator.

3. the energy-conservation terminal equipment of blower fan water pump according to claim 1 intelligence effect is characterized in that the button that the control loop module comprises the miniature circuit breaker that is connected with contactor, the auxiliary reclay that is connected with miniature circuit breaker, the programmable controller that is connected with auxiliary reclay, the human-computer interface device that is connected with programmable controller, links to each other with human-computer interface device.

4. the energy-conservation terminal equipment of blower fan water pump according to claim 1 intelligence effect is characterized in that the signal transmitting device that the signal circuit module comprises spot sensor, is connected with spot sensor, the PID controlling device that is connected with the signal transmitting device.