CN102882442B - Energy saving management method for motor in conveyor belt - Google Patents

Energy saving management method for motor in conveyor belt Download PDF

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Publication number
CN102882442B
CN102882442B CN201210433205.XA CN201210433205A CN102882442B CN 102882442 B CN102882442 B CN 102882442B CN 201210433205 A CN201210433205 A CN 201210433205A CN 102882442 B CN102882442 B CN 102882442B
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China
Prior art keywords
motor
operating state
load
negative
power output
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Expired - Fee Related
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CN201210433205.XA
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Chinese (zh)
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CN102882442A (en
Inventor
方建华
胡雯
马云飞
唐伟凯
梁国林
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Wuhan Iron and Steel Group Corp
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Wuhan Iron and Steel Group Corp
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Abstract

The invention relates to the technical field of a management method, and discloses an energy saving management method for a motor in a conveyor belt. The method comprises the steps as follows: calculating to obtain a demanded power P (load) of a load; calculating to obtain a total output power P (total) of a motor; comparing the P (load) with the P (total), switching the working state of the motor according to a comparison result; if the P (load) is less than the P (total), reducing the number of the working motors to obtain a total output power P' (total) of the rest working motors; comparing the P (load) with the P' (total); recovering to a state of the motor before switching the working state if the rest working motors fail to meet the working demand when the P (load) is greater than the P' (total). According to the management method, the number of the working motors is properly reduced on a basis of meeting a conveying demand according to the comparison result between the demanded power of the load and the total output power of the motor, thereby achieving the purposes of reducing the consumption of the motor and saving the energy.

Description

A kind of administration of energy conservation method of motor in conveyer belt
Technical field
The present invention relates to management method technical field, be mainly applicable to the administration of energy conservation method of motor in conveyer belt.
Background technology
Harbour conveyer belt system is the important component part of harbour bulk cargo terminals.In China, the operational efficiency of general conveyer belt system is lower, and its main cause is that part throttle characteristics is not mated with the torque characteristics of motor.The overall operation situation of China's motor, have a long way to go with abroad comparing, unit efficiency is about 75%, than low by about 10% abroad; Running efficiency of system is 30 ~ 40%, lower than international most advanced level by 20 ~ 30%.When motor institute on-load is less, the operational efficiency of motor is lower; When motor institute on-load is larger, motor just may run with greater efficiency.For certain harbour, the Belt Length of conveyer belt is long, due in actual motion, the time that conveyer belt works in below nominal load works in time of nominal load higher than belt feeder, therefore, its operating efficiency is naturally also lower, and it is naturally also just larger to the loss of energy.Conveyer belt is generally considered by maximum freight volume when Preliminary design, and the Type Selection Principle of reductor and motor to be grade lean on very much not by little, and due to the carrying roller of conveyer belt system more, belt is longer, be the plant equipment that moment of inertia is larger, the power needed for startup is larger.In order to the requirement of satisfied startup, when selecting drive motors, generally can match the larger motor of rated power, generally all having the surplus capacity of 20% ~ 45%.And when system even running, its power is less relative to starting power, in most cases motor is caused to be in light condition.These factors cause system cloud gray model to there is serious " low load with strong power " phenomenon, cause that motor power factor is low, efficiency is low.According to test, power factor sometimes even only has 0.2 ~ 0.3, and the power factor not reaching power supply department requirement far away lower than the requirement (various places are different) of 0.8, must not also add the loss that circuit is unnecessary simultaneously.For the conveyer belt system at certain harbour, it has come with motor-driven belt conveyor, the rated capacity of conveyer belt is 6000T/H, maximum capacity 6700T/H, every bar conveyer belt drives belt roller to drive conveyer belt to operate by three motors by gearbox, shaft coupling, and conveyer belt operational mode is that motor operates after delayed startup in order jointly.This system, since coming into operation, has usually found the situation of load duty far below its rated load of conveyer belt, this means that motor does not normally play its efficiency.If motor operates under being in inefficient state (unloaded or underloading) for a long time, the significant wastage of power consumption will be caused.Therefore can consider, when three motors exist larger waste time, just switch to two motors to run, and after two motors run, load demand power become large, and when having trend not competent to two motors greatly, just start the 3rd motor.Thus reach the loss reducing motor and reduction box, the object of energy savings.
Summary of the invention
Technical problem to be solved by this invention is to provide the administration of energy conservation method of motor in a kind of conveyer belt, and it according to the actual operating state of conveyer belt, can switch motor, thus reaches the minimizing loss of electric machine, the object of energy savings.
For solving the problems of the technologies described above, the administration of energy conservation method that the invention provides motor in a kind of conveyer belt comprises:
Calculate the demand power P of load negative;
Calculate the power output P that motor is total always;
By P negativewith P alwayscompare, switch according to the operating state of comparative result to motor;
If P negativebe less than P always, then reduce the quantity of work drive motor, obtain the power output P that remaining work drive motor is total always'; Again by P negativewith P always' compare, if P negativebe greater than P always', illustrate that remaining work drive motor cannot meet work requirements, then revert to the state before the operating state of motor switched.
Further, described by P negativewith P always' after comparing, if described P negativebe less than described P always', illustrate that remaining work drive motor still can meet work requirements, then continue to reduce the quantity of work drive motor until P negativebe greater than or equal to and continue the total power output of the residue work drive motor after reducing work drive motor; Work as P negativebe greater than described when continuing to reduce the total power output of the residue work drive motor after work drive motor, the quantity increasing work drive motor makes P negativebe less than or equal to the power output that the work drive motor after increasing work drive motor is total.Further, the demand power P of load is calculated described in negativecomprise: pass through formula calculate the demand power of load; Wherein, m is the quality of load, and g is gravity coefficient, and t is the time of load acting, and h is the height that loaded vertical rises.
Further,
Describedly calculate the total power output P of motor alwayscomprise:
First calculate the economy load factor beta of motor, concrete formula is
β = - 1 + 1 + 4 [ ( 1 / η N - 1 ) P N - P 0 ] ( P 1 - P 0 ) / P N 2 2 [ ( 1 / η N - 1 ) P N - P 0 ] / P N
Wherein, η nfor theoretical efficiency, P nfor the rated power of motor, P 1for power input to a machine, P 0for power output during empty load of motor;
Calculate the power output P of every platform motor again motor; Concrete formula is
P motor=β * P n;
Again by the power output P of every platform motor motorsummation, obtains the power output P that motor is total always.
Further, the total power output P of motor is calculated described alwaysbefore, power output P when first obtaining empty load of motor by intelligent instrument 0.
Further, the described operating state to motor is carried out switching and is comprised: carry out switching by platform to the operating state of motor.
Further, the described operating state to motor is carried out switching and is comprised: select manual mode or the operating state of automatic mode to described motor to switch.
Further, described selection manual mode or automatic mode carry out switching to the operating state of motor and comprise: select manual mode or the operating state of automatic mode to described motor to switch,
If select the operating state of described manual mode to motor to switch, then send hint instructions by server to the staff being positioned at work station, staff is switched the operating state of motor by PLC according to described hint instructions;
If select the operating state of described automatic mode to motor to switch, then send switching command by server to described PLC, PLC switches according to the operating state of described switching command to motor.
Further, described intelligent instrument is the RZ102 intelligent instrument of Rui Chuan Electronics Co., Ltd..
Beneficial effect of the present invention is:
In conveyer belt provided by the invention, the administration of energy conservation method of motor is by the comparative result of the demand power of load and the total power output of motor, on the basis of satisfied transmission demand, the quantity of suitable minimizing work drive motor, thus reach the minimizing loss of electric machine, the object of energy savings.The present invention is rational in infrastructure, Be very effective, practical.
Accompanying drawing explanation
The flow chart of the administration of energy conservation method of motor in the conveyer belt that Fig. 1 provides for the embodiment of the present invention.
Fig. 2 is the structured flowchart of the energy conserving system of the administration of energy conservation method of motor in the conveyer belt that provides based on the embodiment of the present invention.
Embodiment
For setting forth the present invention further for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, the embodiment of administration of energy conservation method of motor in the conveyer belt proposed according to the present invention and operation principle are described in detail.
As shown in Figure 1, in conveyer belt provided by the invention, the administration of energy conservation method of motor comprises:
Calculate the demand power P of load negative; Concrete, pass through formula calculate the demand power of load; Wherein, m is the quality of load, and g is gravity coefficient, and t is the time of load acting, and h is the height that loaded vertical rises.
Power output P when obtaining empty load of motor by intelligent instrument again 0.
Calculate the power output P that motor is total always; Concrete,
First calculate the economy load factor beta of motor, concrete formula is
β = - 1 + 1 + 4 [ ( 1 / η N - 1 ) P N - P 0 ] ( P 1 - P 0 ) / P N 2 2 [ ( 1 / η N - 1 ) P N - P 0 ] / P N
Wherein, η nfor theoretical efficiency, P nfor the rated power of motor, P 1for power input to a machine, P 0for power output during empty load of motor;
Calculate the power output P of every platform motor again motor; Concrete formula is
P motor=β * P n
Again by the power output P of every platform motor motorsummation, obtains the power output P that motor is total always.
By P negativewith P alwayscompare, switch according to the operating state of comparative result to motor;
If P negativebe less than P always, then reduce the quantity of work drive motor, obtain the power output P that remaining work drive motor is total always'; Again by P negativewith P always' compare, if P negativebe greater than P always', illustrate that remaining work drive motor cannot meet work requirements, then revert to the state before the operating state of motor switched; If P negativebe less than P always', illustrate that remaining work drive motor still can meet work requirements, then continue to reduce the quantity of work drive motor until P negativebe greater than or equal to and continue the total power output of the residue work drive motor after reducing work drive motor; Work as P negativebe greater than when continuing to reduce the total power output of the residue work drive motor after work drive motor, the quantity increasing work drive motor makes P negativebe less than or equal to the power output that the work drive motor after increasing work drive motor is total.
If P negativeequal P always, then the operating state of work drive motor is not switched.
It should be noted that, in the present embodiment, switching is carried out to the operating state of motor and comprises: select manual mode or automatic mode to carry out switching by platform to the operating state of motor.
If select the operating state of manual mode to motor to switch, then send hint instructions by server to the staff being positioned at work station, staff is switched the operating state of motor by PLC according to hint instructions;
If select the operating state of automatic mode to motor to switch, then send switching command by server to PLC, PLC switches according to the operating state of switching command to motor.
Preferably, intelligent instrument is the RZ102 intelligent instrument of Rui Chuan Electronics Co., Ltd..
In the present embodiment, motor is alternating current machine, and quantity is 3.
As shown in Figure 2, based on the administration of energy conservation method of motor in conveyer belt provided by the invention energy conserving system operationally, start three alternating current machines first successively, power output when measuring three empty load of motor by intelligent instrument.By computing module, power output total for three motors is calculated again, then the demand power of load and the total power output of three motors are compared.If comparative result represents that 2 motors can meet safe and reliable condition of work, and need a motor in manually excision 3, hint instructions (namely instruction needs excision 1 motor) is sent to the staff being positioned at active station again by server, after the staff of active station sees hint instructions, cut away a motor by PLC.If desired employing automatic mode excises a motor in 3, then server sends the instruction of an excision motor directly to PLC.
When two motors work simultaneously, when workload increases, namely load demand power becomes large, and when having trend not competent to two motors greatly, manual mode or automatic mode can be taked to increase a motor.If select manual mode to increase motor, then the staff being positioned at active station increases a motor participation job by PLC.If select automatic mode to increase motor, then server sends the instruction of an increase motor directly to PLC.
It should be noted that, when test data display meets excision or increases a motor conditions, through one section of time delay (prevent collect for false signal), namely the signal in a period of time is judged continuously, can excise if the result gone out by the signal analysis in a period of time is all expressed as or increases motor, just by PLC, motor being switched.
In conveyer belt provided by the invention, the administration of energy conservation method of motor is by the comparative result of the demand power of load and the total power output of motor, on the basis of satisfied transmission demand, the quantity of suitable minimizing work drive motor, thus reach the minimizing loss of electric machine, the object of energy savings.The present invention is rational in infrastructure, Be very effective, practical.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims (7)

1. the administration of energy conservation method of motor in conveyer belt, is characterized in that, comprising:
Calculate the demand power P of load negative;
Calculate the power output P that motor is total always; Particularly,
First calculate the economy load factor beta of motor, concrete formula is
β = - 1 + 1 + 4 [ ( 1 / η N - 1 ) P N - P 0 ] ( P 1 - P 0 ) P N 2 2 [ ( 1 / η N - 1 ) P N - P 0 ] / P N
Wherein, η nfor theoretical efficiency, P nfor the rated power of motor, P 1for power input to a machine, P 0for power output during empty load of motor;
Calculate the power output P of every platform motor again motor; Concrete formula is
P motor=β * P n;
Again by the power output P of every platform motor motorsummation, obtains the power output P that motor is total always;
By P negativewith P alwayscompare, switch according to the operating state of comparative result to motor;
If P negativebe less than P always, then reduce the quantity of work drive motor, obtain the power output P that remaining work drive motor is total always'; Again by P negativewith P always' compare, if P negativebe greater than P always', illustrate that remaining work drive motor cannot meet work requirements, then revert to the state before the operating state of motor switched; Described by P negativewith P always' after comparing, if described P negativebe less than described P always', illustrate that remaining work drive motor still can meet work requirements, then continue to reduce the quantity of work drive motor until P negativebe greater than or equal to and continue the total power output of the residue work drive motor after reducing work drive motor; Work as P negativebe greater than described when continuing to reduce the total power output of the residue work drive motor after work drive motor, the quantity increasing work drive motor makes P negativebe less than or equal to the power output that the work drive motor after increasing work drive motor is total;
If P negativeequal P always, then the operating state of work drive motor is not switched.
2. the administration of energy conservation method of motor in conveyer belt as claimed in claim 1, is characterized in that, described in calculate the demand power P of load negativecomprise: pass through formula calculate the demand power of load; Wherein, m is the quality of load, and g is gravity coefficient, and t is the time of load acting, and h is the height that loaded vertical rises.
3. the administration of energy conservation method of motor in conveyer belt as claimed in claim 1, is characterized in that, calculate the total power output P of motor described alwaysbefore, power output P when first obtaining empty load of motor by intelligent instrument 0.
4. the administration of energy conservation method of motor in conveyer belt as claimed in claim 1, it is characterized in that, the described operating state to motor is carried out switching and is comprised: carry out switching by platform to the operating state of motor.
5. as the administration of energy conservation method of motor in the conveyer belt in claim 1-4 as described in any one, it is characterized in that, the described operating state to motor is carried out switching and is comprised: select manual mode or the operating state of automatic mode to described motor to switch.
6. the administration of energy conservation method of motor in conveyer belt as claimed in claim 5, it is characterized in that, described selection manual mode or automatic mode carry out switching to the operating state of motor and comprise: select manual mode or the operating state of automatic mode to described motor to switch
If select the operating state of described manual mode to motor to switch, then send hint instructions by server to the staff being positioned at work station, staff is switched the operating state of motor by PLC according to described hint instructions;
If select the operating state of described automatic mode to motor to switch, then send switching command by server to described PLC, PLC switches according to the operating state of described switching command to motor.
7. the administration of energy conservation method of motor in conveyer belt as claimed in claim 3, it is characterized in that, described intelligent instrument is the RZ102 intelligent instrument of Rui Chuan Electronics Co., Ltd..
CN201210433205.XA 2012-11-01 2012-11-01 Energy saving management method for motor in conveyor belt Expired - Fee Related CN102882442B (en)

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CN114634005B (en) * 2022-03-31 2023-07-25 国能神东煤炭集团有限责任公司 Driving control method and system for belt conveyor

Citations (4)

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Publication number Priority date Publication date Assignee Title
CN1075691A (en) * 1992-12-18 1993-09-01 连云港港务局煤炭装卸公司 Energy saving operation method for large band conveyer
CN101875432A (en) * 2009-04-28 2010-11-03 河南理工大学 Direct-drive scraping plate conveying device
CN101898681A (en) * 2010-08-20 2010-12-01 上海电器科学研究所（集团）有限公司 Method for load predicative control of belt conveyor
CN102502210A (en) * 2011-09-29 2012-06-20 中联重科物料输送设备有限公司 Operation method of belt conveyor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6659726B2 (en) * 2001-12-31 2003-12-09 Carrier Corporation Variable speed control of multiple motors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1075691A (en) * 1992-12-18 1993-09-01 连云港港务局煤炭装卸公司 Energy saving operation method for large band conveyer
CN101875432A (en) * 2009-04-28 2010-11-03 河南理工大学 Direct-drive scraping plate conveying device
CN101898681A (en) * 2010-08-20 2010-12-01 上海电器科学研究所（集团）有限公司 Method for load predicative control of belt conveyor
CN102502210A (en) * 2011-09-29 2012-06-20 中联重科物料输送设备有限公司 Operation method of belt conveyor

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