CN1373081A - Method and device for increasing electric efficiency of apparatus and saving electric energy - Google Patents

Abstract

A method for raising the electric consumption efficiency of apparatus and saving electric energy is characterized by that an efficiency raising device is serially connected between AC power supply and said apparatus. The efficiency is measured by an instrument at the apparatus end. The optimal efficiencies at different loads of the apparatus are calculated out. The measured voltage, efficiency and real power are input to microcomputer. when the load changes, new current value is measured and a voltage regulator of said efficiency raising device is started to regulate the voltage for optimal real power.

Description

The method of lifting means power consumption efficiency and economize on electricity and device thereof

The present invention relates to the method and the device thereof of a kind of lifting means power consumption efficiency and economize on electricity.

Current civilization and the advancement of the society, science and technology are growing, have benefited from the invention and the application of electric energy entirely, but make the obtaining of resource coal, oil, natural fuels, nuclear energy etc. of electric energy, and cost improves day by day, and the day that exhausts is arranged all eventually.Though existing some electric energy is to utilize solar energy converting, still can not replace the existing employed resource of electric energy of making at present fully.And the human electric energy that uses increases day by day, builds the power plant except increasing, and commercial unit and civilian household electrical appliances towards the designs of low power consumption, are the target that industrial community is pursued so how to produce or develop the Apparatus and method for that can economize on electricity all now.

The electricity charge at present be calculated as KWH=VI COS θ; Wherein

KWH=kilowatt-hour (real power)

V=voltage

The I=electric current

COS θ=power factor

Now the power-saving method of general normal use at present is analyzed as follows one by one: 1, improve power factor

Does the power factor increase have or not benefit to the user? the increase of power factor can be offset the effect that Vl reduces, but Utilities Electric Co. is when calculating the electricity charge, can include power factor in calculating, in power factor greater than 0.8 o'clock, the electricity charge can be low according to effect horse power factor button, when power factor less than 0.8 the time, then need pay load the more electricity charge, therefore, if user's power factor can be improved, though can not reduce employed utility ratio, even offset the part effect of step-down running, but still can return by the part electricity charge recoupment that reduces.The benefit of hoisting power factor still has the increase plant factor in addition, reduce advantages such as line loss, but this kind method is very limited for the use that improves electric energy.2, voltage method is fallen

Utilize a step-down transformer or other can reach the direct step-down of the structure that electronic component constituted of step-down, its effect is simple and easy, obvious, especially obvious for daylight lamp, but shortcoming is, when the voltage that Utilities Electric Co. supplied, as often on the low side when the spike, voltage method falls in utilization, then easily causes voltage below level, equipment can't be started or deterioration of efficiency that equipment uses, and more power consumption, so cooresponding limitation is arranged in the use.3, the mode of voltage stabilizing

When it is to improve direct step-down, the mistake low voltage of being supplied during because of Utilities Electric Co.'s spike, but kind equipment for general electromobility, inductive motor, compressor, often because of starting moment or using at full capacity the time, this moment is as being stabilized in a voltage also lower than equipment rated voltage, can make the due efficient of equipment out of reach on the contrary and cause the electric current of use excessive, run counter to desire and the effect of out of reach power saving, even power consumption more.4, change the method for frequency

General electro-motor can utilize the change frequency to come rev down, to reach the power saving purpose, only limits to the equipment that is used in rev down and does not influence efficient (acting) and so at present, generally be used for the AC motor, and efficient must immobilize, if efficient is variability, then this kind method is not feasible.

Moreover present energy-saving device can only be used for resistive load targetedly, has effect as light equipment etc., but for picture air conditioner, equipment that this power consumption of frozen water machine is big, does not still have battery saving mode preferably at present.

According to conservation of energy theorem, when an equipment service efficiency reaches capacity (100%), no matter how, neither space with economize on electricity when opposite desiring makes the equipment horsepower output reach maximum, just need provide a load voltage value, can achieve the goal.So we obtain a checking, the equipment of characteristics such as promptly every all inductive, electromobility, when its load factor is the limit of this equipment, the space of almost just not economizing on electricity, otherwise, the space that promotes efficient and economize on electricity is promptly arranged.

Therefore, have equipment under seasonality, timeliness or the particular surroundings at some, its load factor then can be sought the optimum efficiency of equipment own through the following person of certain ratio that is everlasting, and reaches the effect of economize on electricity, the problem that this solves for institute of the present invention desire.

Main purpose of the present invention is, the method and the device thereof of a kind of lifting means power consumption efficiency and economize on electricity is provided, be make an equipment according to the difference of load factor appropriateness adjust voltage, to seek the optimum efficiency of equipment itself.

A further object of the present invention is, the method and the device thereof of a kind of lifting means power consumption efficiency and economize on electricity is provided, and when it makes equipment reach optimum efficiency, and has less electricity consumption.

The objective of the invention is to realize by following technical scheme.

The method of a kind of lifting means power consumption efficiency and economize on electricity is characterized in that, this method comprises:

A, connecting between source of AC and equipment one promotes the efficient device, with parameters such as the current value of check implement electricity consumption, real powers, and can start a voltage pressure regulating device, changes the voltage of input side to load;

B, be that load end detects its efficient with detecting instrument at equipment;

C, the optimum efficiency (%) of the equipment that calculates when the different loads rate and at that time utilization voltage value and real power (KWH), and detect its electricity consumption current value;

D, the magnitude of voltage (V) that the various situation of preceding paragraph is detected, efficient (%), real power (KWH) and the memory storage of current value input micro processor;

E, when the load factor of equipment changes, described lifting efficient device detects up-to-date current value, and calculates the pairing utilization voltage value of its best real power (KWH) of optimum efficiency at once by micro processor;

F, startup promote the voltage adjustment mechanism of efficient device, voltage is adjusted to can obtains the required magnitude of voltage of best real power (KWH).

Aforesaid lifting means power consumption efficiency and the employed lifting efficient of power-saving method device, it is characterized in that, it is connected between source of AC and the load, comprising: a voltage adjustment mechanism, a voltage stabilizing driving circuit, a power tester, a current sensor, a micro processor;

Described voltage adjustment mechanism is made of pressure regulator, Energy Saving Unit or equivalent regulator;

Described voltage stabilizing driving circuit is to be connected with described voltage adjustment mechanism;

Described power tester is in order to the numerical value (KWH) of check implement load-side when the optimum efficiency, and signal is delivered to micro processor;

Described current sensor is the electricity consumption current value (A) of load-side in order to check implement;

Described micro processor comprises at least: a current detecting is set storage circuit, the circuit of a current versus voltage, and electric current, voltage, efficiency ratio are and corresponding circuits; And can make equipment when load factor changes the aforementioned data memory storage, and detect up-to-date current value, calculate the pairing magnitude of voltage of best service efficiency, and make voltage stabilizing driving circuit trigger voltage adjusting mechanism, make the optimal corresponding voltage value of its supply arrangement.

Aforesaid lifting efficient device, wherein this load-side is provided with the efficient detector, in order to the check implement optimum efficiency, and measured signal is delivered to micro processor.

The present invention can be according to apparatus of load rate difference, is that bench mark is adjusted voltage with current value at that time, to seek the optimum efficiency of equipment own, reaches the economize on electricity effect.

When it makes equipment reach optimum efficiency, and has less electricity consumption.

For further understanding technology contents of the present invention, characteristics and effect, exemplify following preferred embodiment now, and conjunction with figs. is described in detail as follows:

Fig. 1 is the block schematic diagram that the present invention promotes the efficient device.

Fig. 2 is that voltage of the present invention is adjusted the logical block scheme drawing.

At first, see also shown in Fig. 1,2, the method of lifting efficient of the present invention and saving, it is bigger at some load factor changes, or often distance is fully loaded with the equipment that many spaces are still arranged, the method of a kind of lifting means efficient of being invented, and its used technological means, be change (adjustment) voltage that makes equipment appropriateness according to the difference of load factor, to seek the optimum efficiency of equipment itself, reach the effect of economize on electricity, and with the current value surveyed the at that time bench mark (ratio value) as control, its method comprises: following steps:

(a) between source of AC (1) and equipment (2), connect and one promote efficient device (3),, and can start a voltage adjustment mechanism, change the voltage of input side (1) to load-side (2) in order to parameters such as the current value of check implement (2) electricity consumption, real powers;

(b) detect its efficient at equipment (load-side) end (2) with detecting instrument (4);

(c) calculate the optimum efficiency (%) of equipment (2) when the different loads rate and at that time utilization voltage value and real power (KWH), and detect its electricity consumption current value;

(d) magnitude of voltage (V) that the various situation of preceding paragraph is detected, efficient (%), real power (KWH)

(e)

Pairing utilization voltage value;

(f) start the voltage adjustment mechanism (31) that promotes efficient device (3), voltage is adjusted to obtains the required magnitude of voltage of best real power (KWH).

Aforesaid lifting efficient device (3), the preferable possible embodiments of one includes:

One voltage adjustment mechanism (31) is made of pressure regulator, Energy Saving Unit or equivalent regulator; (can use the RLS or the RLSA type of Qiao Bai STARE-II AVK voltage stabilizer);

One voltage stabilizing driving circuit (32) is in order to driving voltage adjusting mechanism and mu balanced circuit;

One power tester (33) in order to the horsepower input numerical value (KWH) of check implement (load-side) (2) when the optimum efficiency, and is delivered to micro processor (35) (can use " power tester of good fortune record gram FLUKE brand F43 model) with signal;

One current sensor is in order to the electricity consumption current value (A) (can use CELSA brand IBG100:5 pattern) of check implement (load-side) (2);

One micro processor (35), it includes at least: a current detecting is set storage circuit, the circuit of a current versus voltage, and electric current, voltage, efficiency ratio are and corresponding circuits; And to the aforementioned data memory storage, make equipment (2) when load factor changes, detect up-to-date current value, calculate the pairing magnitude of voltage of best service efficiency, and make voltage stabilizing driving circuit (32) trigger voltage adjusting mechanism (31), make its equipment (2) that optimal corresponding voltage value (can use Winbond brand W78E54-24 model) is provided

Load-side of the present invention is provided with efficient detecting instrument (4), and described efficient detecting instrument (4) is set according to the function of equipment institute desire detection, for example detect torsion efficient and then use torque dynamometer, then use revolution counter during the check implement rotating speed, it includes in addition: various detecting instruments such as anemograph, pressure gauge, weight meter, but it is all commercially available instrument, so do not give unnecessary details.

The present invention is by said method and device, when equipment hangs down load factor, can obviously promote its efficient (Efficient) and economize on electricity ratio, for example certain motor is when load factor 50%, if still supply with, may not necessarily obtain optimum efficiency (%), if therefore seek out in advance the required magnitude of voltage of its optimum efficiency of arbitrary equipment according to normal voltage 220V, and at that time current value and real power, and give memory storage.When load factor changes, by detecting up-to-date current value (A), can calculate the pairing magnitude of voltage of optimum efficiency (V), and trigger voltage adjusting mechanism (31) is adjusted to optimum value (for example 200V) with voltage, for example when the load factor of an equipment only has 35%, if supply with 220V voltage, its mechanical efficiency is 77%, when supplying with 200V voltage then mechanical efficiency be 79%, therefore can promote efficient is 2%, and horsepower input is 400 (W) during relative 220V voltage, and horsepower input is 380 (W) during 200V voltage, then its economize on electricity ratio is 5%, according to the situation of this reality, when the load factor of equipment changes, if change (adjustment) voltage of energy appropriateness, to seek the optimum efficiency of equipment own, can reach the effect of economize on electricity really.

But, the earthquake at any time of the load factor of equipment, pairing magnitude of voltage when therefore how to obtain optimum efficiency is the major technique means that the present invention solves this problem.As shown in Figure 2, that is the present invention is when load factor (LO) changes, utilize current sensor (34) to record the up-to-date current value (NA) of equipment (2) electricity consumption at that time, and micro processor (35) its pairing utilization voltage value of best real power (KWH) (NV) when calculating optimum efficiency at once, so trigger voltage adjusting mechanism (31), the normal voltage (about 220V) that to be sent into by civil power is adjusted to and can obtains the required magnitude of voltage (V) of best real effect.This magnitude of voltage (V) may be 210V or 200V, if 200V, then voltage adjustment mechanism (31) magnitude of voltage of delivering to equipment (2) is 200V as shown in Figure 1, like this, can reach power savings, and make equipment performance optimum efficiency.

For confirming that the present invention can implement really, now explain with a real data, see also shown in the table 1:

Table 1:

What it disclosed is the first motor in a kind of commercially available east is supplied with optimum voltage value (V) when the different loads rate data, its top is an optimum voltage, the below is a normal voltage, can know by this table and to learn, when load factor 0%, normal voltage 220V current value is 1.87A, when horsepower input 78 (W) and voltage are 140V, current value 1.03 (A), horsepower input are 36 (W); Therefore, when zero load, voltage that only must 140V can make its running, and voltage that must 220V, so can economize on electricity 116.6%.

Again, when load factor is 25%, its every numerical value such as following table 2:

Voltage (V)	Electric current (A)	Horsepower input (W)	Power (%)	Power factor (%)	Economize on electricity ratio (%)	Improved efficiency (%)
							??150 ??220	??1.47 ??1.96	??245.49 ??272.12	????76.38 ????69.21	???64.12 ???36.22	???10.85	???7.17

Learn that by last table is clear when load factor was 25%, as input normal voltage 220 (V), then current value was 1.96 (A), horsepower input 272.12 (W), efficient 69.21%, power factor 36.22%; During optimum voltage 150 (V), the ratio 10.85% (horsepower input is compared) that can obtain to economize on electricity, and improved efficiency 7.17%; Data are learnt thus, when load factor is 25%, only can obtain 69.21% efficient as input normal voltage 220 (V), and power consumption are 272.12 (W); Otherwise cooresponding voltage is 150 (V) when learning its optimum efficiency 76.38%, then only must supply with the voltage of 150 (V), not only can promote efficient 7.17%, more can save electric energy (272.12-245.49)=26.63 (W), that is the economize on electricity ratio is 10.85%.

Based on the above-mentioned fact, when load factor is 50% or 40%, supplying with how much voltage can obtain power savings and promote efficient, naturally be perfectly clear, and the data by attach one in the table 1: induction motor characteristic test writing chart, measured in different loads rate, different voltage with data, it is the first 1.00HP in commercially available east, the test that the motor of model: AEEF is done sees also, so do not describe in detail.

Please consult shown in the table 3 again: table 3:

The comparison sheet invariablenes turning speed of change of voltage and consumed power

Frequency (Hz)	Rotating speed (rpm)	Voltage (V)	Torque (kg-m)	Electric current (A)	Power (W)	Remarks
							? ? 60	? ? 1710	??240	??0.511	??3.52	??1120
??220	??0.426	??3.13	??940	Fully loaded
					??200	??0.362			??2.81	??775
??180	??0.298	??2.53	??635
					??160	??0.234			??2.23	??500
??140	??0.181	??1.97	??390
					??120	??0.128			??1.68	??278
??100	??0.09	??1.38	??192
					??80	??0.06			??1.09	??120
					Remarks	Invariablenes turning speed: with the voltage of rated frequency, the rotating speed under specified output

The comparison sheet of its change of voltage and consumed power, the present invention illustrates how to promote efficient and economize on electricity with an observed data again; Table 2 is that the constant 1710rpm of being of motor rotary speed turns round, and when voltage 220V at full load, its torque is 0.426 (kg-m), current value 3.13 (A), horsepower input 940 (W); When its torque load(ing) only must 0.362 (kg-m), recording its current value is 2.81 (A), horsepower input 775 (W), like this, cooresponding optimum voltage value is 200 (V), promptly make voltage adjustment mechanism (31) that magnitude of voltage is transferred to 200V and deliver to equipment (motor), can obtain to economize on electricity and promote the effect of efficient by micro processor (35).Because the load factor of general motor much is below 50%, therefore, has living space and use the effect that the present invention reaches expection.

Certainly, as finding out, perhaps suspects in load factor 75% or as if do not have economize on electricity at 100% o'clock and promoted the space of efficient, but the data sheet shown in the table 1 is to finish in the laboratory that its normal voltage is all set 220V from the data sheet shown in the table 2; When yet equipment used in reality, the voltage that Utilities Electric Co. supplied with was differing very big from the spike period, when the peak, have up to 240V more than, what have during spike is low below 190V; Therefore, be not the space of not economizing on electricity fully, even electric energy is little when the high capacity rate, but under this civil power service voltage variation situation greatly, the present invention still can be used as voltage stabilizer and uses, and supplies with a burning voltage to equipment (2), can guarantee its mechanical efficiency, and improve service life of equipment.

Learn that by said method and observed data arbitrary equipment can improve efficient from reducing voltage really, and obtain power saving effect, must carry out and adjust voltage under the principle that does not influence its equipment acting optimum efficiency when load factor changes; Like this, when the present invention uses load factor to change, the up-to-date current value that moment is detected can make voltage adjustment mechanism (31) that voltage is adjusted to rapidly and can obtain the required magnitude of voltage of best real power as the bench mark of controlling, to reach the double effects of economize on electricity and lifting efficient.

In sum, disclosed method has novelty, creativeness, novelty really, so file an application in accordance with the law.

The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.

Claims (3)

1, the method for a kind of lifting means power consumption efficiency and economize on electricity is characterized in that, this method comprises:

A, connecting between source of AC and equipment one promotes the efficient device, with parameters such as the current value of check implement electricity consumption, real powers, and can start a voltage pressure regulating device, changes the voltage of input side to load;

B, be that load end detects its efficient with detecting instrument at equipment;

C, the optimum efficiency (%) of the equipment that calculates when the different loads rate and at that time utilization voltage value and real power (KWH), and detect its electricity consumption current value;

D, the magnitude of voltage (V) that the various situation of preceding paragraph is detected, efficient (%), real power (KWH) and the memory storage of current value input micro processor;

E, when the load factor of equipment changes, described lifting efficient device detects up-to-date current value, and calculates the pairing utilization voltage value of its best real power (KWH) of optimum efficiency at once by micro processor;

F, startup promote the voltage adjustment mechanism of efficient device, voltage is adjusted to can obtains the required magnitude of voltage of best real power (KWH).

2, a kind of lifting means power consumption efficiency as claimed in claim 1 and the employed lifting efficient of power-saving method device, it is characterized in that, it is connected between source of AC and the load, comprising: a voltage adjustment mechanism, a voltage stabilizing driving circuit, a power tester, a current sensor, a micro processor;

Described voltage adjustment mechanism is made of pressure regulator, Energy Saving Unit or equivalent regulator;

Described voltage stabilizing driving circuit is to be connected with described voltage adjustment mechanism;

Described power tester is in order to the numerical value (KWH) of check implement load-side when the optimum efficiency, and signal is delivered to micro processor;

Described current sensor is the electricity consumption current value (A) of load-side in order to check implement;

Described micro processor comprises at least: a current detecting is set storage circuit, the circuit of a current versus voltage, and electric current, voltage, efficiency ratio are and corresponding circuits; And can make equipment when load factor changes the aforementioned data memory storage, and detect up-to-date current value, calculate the pairing magnitude of voltage of best service efficiency, and make voltage stabilizing driving circuit trigger voltage adjusting mechanism, make the optimal corresponding voltage value of its supply arrangement.

3, lifting efficient device according to claim 2 is characterized in that described load-side is provided with the efficient detector, in order to the check implement optimum efficiency, and measured signal is delivered to micro processor.

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