CN101815389A - Starting device and method and power supply system - Google Patents
Starting device and method and power supply system Download PDFInfo
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- CN101815389A CN101815389A CN200910078157A CN200910078157A CN101815389A CN 101815389 A CN101815389 A CN 101815389A CN 200910078157 A CN200910078157 A CN 200910078157A CN 200910078157 A CN200910078157 A CN 200910078157A CN 101815389 A CN101815389 A CN 101815389A
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Abstract
The invention provides a starting device, a starting method and a power supply system for improving the starting current in a circuit. The starting device is connected in series with a heating element and consists of a starting impedor and a starting switch which are connected in parallel. When the heating element is started, the starting switch is turned off so as to turn on the starting impedor to divide the voltage and limit the current of the path; and after the heating element is fully started, the starting switch is turned off to make the two ends of the starting impedor have a short circuit, so that the heating element can work at a rated working current. The method for improving the starting current in the circuit comprises the following steps: connecting the starting device in series with the heating element; starting the heating element and turning off the starting switch at the same time; and after the heating element is fully started, turning off the starting switch. The power supply system comprises the starting device and/or the starting method. The starting device, the starting method and the power supply system have the advantages of effectively reducing the starting current, along with simple structure, no harmonic pollution and the like.
Description
Technical field
The present invention relates to circuit control technology field, particularly, relate to a kind of starting drive, method and electric power system that is used for improving the circuit starting current.
Background technology
Along with technological progress, the mode of production extensive, automation has become the inexorable trend of current industrial development, and meanwhile, the scale of production equipment and operate power are also in continuous increase.Therefore, fail safe and the stability of keeping electric power system and production equipment has become the significant problem that those skilled in the art need solve.
For example, in the production equipment of solar cell, just there is the excessive problem of starting current in the electric power system that is used for the infrared radiation heating fluorescent tube (being designated hereinafter simply as infrared lamp) of preheating silicon chip.Its reason is that the filament material of infrared lamp adopts tungsten filament to make mostly, through mensuration, about half the when resistivity of tungsten filament cold conditions only is operating state.Therefore, when infrared fluorescent tube when cold conditions starts, the rated current the when moment in the circuit, starting current will be much larger than its operate as normal.And excessive starting current can increase the voltage drop on the transmission line, the operate as normal that this not only can cause the supply power voltage deficiency and have influence on other loads; And the circuit breaker in the whole electric power system, the design rated capacity of fuse are increased, thereby increase equipment cost; Also can increase the probability that sparking takes place between the equipment binding post what is more, cause the potential safety hazard of equipment.
As shown in Figure 1, at present commonly used a kind of be used to reduce above-mentioned infrared lamp moment starting current circuit block diagram, it reduces the moment starting current of system by being connected on thyristor power regulating eqiupment between power supply and the infrared lamp.Its principle is by progressively changing the phase shifting angle of power tube in the thyristor power regulating eqiupment, the voltage effective value at infrared lamp two ends to be risen gradually, thereby control starting current.
But the use meeting of thyristor power regulating eqiupment brings some new problems to circuit: at first, through behind the thyristor voltage regulation, can produce wave distortion in the circuit, reduce power factor and cause system overheat, and then reduce the useful life of equipment; Secondly, the thyristor power regulating eqiupment can cause serious harmonic pollution to system, the quality of power supply is descended and the generation electromagnetic compatibility problem.And, need insert filter (as shown in Figure 1) in the rear end of thyristor power regulating eqiupment usually in order to reduce harmonic wave, like this, not only increase equipment cost, and adopt too much extras also will reduce the stability and the fail safe of whole system.
Summary of the invention
For addressing the above problem, the invention provides a kind of starting drive, method and electric power system that is used for improving the circuit starting current, it can also avoid the fail safe and the stability of harmonic pollution, raising system in effective reduction system moment starting current.
For this reason, the invention provides a kind of starting drive that is used for improving the circuit starting current, it is connected with heating element, the immediate current when starting heating element in order to be reduced in the circuit.This starting drive comprises startup impedance and the starting switch that is connected in parallel to each other, starting switch is in off-state when starting heating element, make heating element and startup impedance form path, so that start impedance this path is realized the dividing potential drop current limliting, thereby be reduced in the immediate current in this path when starting heating element; Starting switch is in closure state after heating element starts fully, will start impedance two terminal shortcircuits, make the heating element and the starting switch of closure form path, thereby heating element is worked under rated current.
Wherein, starting switch comprises the time relay, and it arrives heating element i.e. action after complete start-up time, will starting impedance two terminal shortcircuits, thereby makes heating element and closed starting switch formation path.Wherein, heating element is measured complete start-up time in advance by experiment.
Wherein, start impedance and comprise resistance and/or inductance and/or electric capacity.
Wherein, heating element comprises the infrared lamp that n props up parallel connection and/or is cascaded, and n is the positive integer more than or equal to 1.
Wherein, the span of resistance satisfies condition shown in the following formula:
In the following formula, n is the quantity of infrared lamp in the single-phase loop, I
NBe the rated current in each phase loop, V is a supply voltage, R
CBe the cold-state resistance of single infrared lamp, R
XBe the resistance value that satisfies condition.
Wherein, the span of inductance satisfies condition shown in the following formula:
In the following formula, n is the quantity of infrared lamp in the single-phase loop, I
NBe the rated current in each phase loop, V is a supply voltage, R
CBe the cold-state resistance of single infrared lamp, ω is the specified angular frequency of power supply, L
XBe the inductance value that satisfies condition.
Wherein, the span of electric capacity satisfies condition shown in the following formula:
In the following formula, n is the quantity of infrared lamp in the single-phase loop, I
NBe the rated current in each phase loop, V is a supply voltage, R
CBe the cold-state resistance of single infrared lamp, ω is the specified angular frequency of power supply, C
XBe the capacitance that satisfies condition.
In addition, the present invention also provides a kind of method that is used for improving the circuit starting current, and it comprises the steps:
10) to heating element tandem promoter device, starting drive comprises startup impedance and the starting switch that is connected in parallel to each other;
20) start heating element, disconnect starting switch simultaneously, make heating element form path, this path is realized the dividing potential drop current limliting, thereby be reduced in the immediate current in this path when starting heating element so that start impedance with starting impedance;
30) after element to be heated started fully, closed starting switch will start impedance two terminal shortcircuits, made heating element and closed starting switch form path, thereby guaranteed that heating element works under rated operational current.
Wherein, in step 20) and step 30) between also comprise such step: promptly, judge whether begin to start the time that is continued behind the heating element arrives complete start-up time, if then forward step 30 to); If not, then forward step 20 to).Wherein, step 20) also comprises such step before: promptly, measure heating element complete start-up time in advance by experiment.
Wherein, start impedance and comprise resistance and/or inductance and/or electric capacity.
Wherein, heating element comprises the infrared lamp that n props up parallel connection and/or is cascaded, and n is the positive integer more than or equal to 1.
Wherein, the span of resistance satisfies condition shown in the following formula:
In the following formula, n is the quantity of infrared lamp in the single-phase loop, I
NBe the rated current in each phase loop, V is a supply voltage, R
CBe the cold-state resistance of single infrared lamp, R
XBe the resistance value that satisfies condition.
Wherein, the span of inductance satisfies condition shown in the following formula:
In the following formula, n is the quantity of infrared lamp in the single-phase loop, I
NBe the rated current in each phase loop, V is a supply voltage, R
CBe the cold-state resistance of single infrared lamp, ω is the specified angular frequency of power supply, L
XBe the inductance value that satisfies condition.
Wherein, the span of electric capacity satisfies condition shown in the following formula:
In the following formula, n is the quantity of infrared lamp in the single-phase loop, I
NBe the rated current in each phase loop, V is a supply voltage, R
CBe the cold-state resistance of single infrared lamp, ω is the specified angular frequency of power supply, C
XBe the capacitance that satisfies condition.
In addition, the present invention also provides a kind of electric power system that can improve starting current in the circuit, comprises power supply, and power supply is the three-phase alternating source, wherein at least onely is serially connected with mutually: mains switch, in order to control the break-make of whole electric power system; Heating element is converted into thermal radiation in order to the electric energy that power supply is provided; At least one in this electric power system three-phase also includes starting drive provided by the invention in mutually, and it is serially connected with between mains switch and the heating element, the immediate current when starting heating element in order to be reduced in the circuit.
In addition, the present invention also provides a kind of electric power system that can improve starting current in the circuit, comprises power supply, and power supply is the three-phase alternating source, wherein at least onely is serially connected with mutually: mains switch, in order to control the break-make of whole starting drive; Heating element is converted into thermal radiation in order to the electric energy that power supply is provided; This electric power system has also been used the method that is used for improving the circuit starting current provided by the invention, the immediate current when starting heating element in order to be reduced in the circuit.
The present invention has following beneficial effect:
Starting drive provided by the present invention is used for improving the circuit starting current, and it is connected between mains switch and the heating element, comprises startup impedance and starting switch in parallel.In the process that starts heating element, start the effect that impedance is connected with heating element and played the dividing potential drop current limliting; After heating element started fully, starting switch was closed and will start the impedance short circuit.Therefore, starting drive provided by the invention can effectively reduce the moment starting current of system, and has advantage simple in structure, that be easy to realize.And, behind closed starting switch, there are not extras in the system, thus the problem of harmonic pollution in the system and electromagnetic compatibility etc. can be avoided, thus improve the fail safe and the stability of system.
The method that is used for improving the circuit starting current provided by the invention, can effectively reduce the moment starting current of system by the starting drive that is formed in parallel by startup impedance and starting switch, simple to operate, be easy to realize, can also avoid simultaneously the problem of harmonic pollution in the system and electromagnetic compatibility etc., improve the fail safe and the stability of system.
Electric power system provided by the invention is used starting drive provided by the invention and/or method, can effectively reduce the moment starting current of system equally, improves the fail safe and the stability of system.
Description of drawings
Fig. 1 is a kind of circuit block diagram that is used to reduce starting current commonly used at present;
Fig. 2 is for having adopted the system configuration schematic diagram of the starting drive that first embodiment of the invention provided;
Fig. 3 is for having adopted the system configuration schematic diagram of the starting drive that second embodiment of the invention provided;
Fig. 4 is for having adopted the system configuration schematic diagram of the starting drive that third embodiment of the invention provided; And
Fig. 5 is used for improving a kind of schematic flow sheet of embodiment of the method for circuit starting current for the present invention.
Embodiment
For making those skilled in the art understand technical scheme of the present invention better, the electric power system that is used for improving starting drive, the method for circuit starting current and uses above-mentioned starting drive and/or method provided by the invention is described in detail below in conjunction with accompanying drawing.
See also Fig. 2, the application system block diagram of the starting drive that provides for first kind of embodiment of the present invention (starting drive is the part in the point-like frame of broken lines among the figure, among following Fig. 3 and Fig. 4 in like manner).As shown in the figure, in the present embodiment, adopt the resistance R element as starting impedance, starting switch S2 is in parallel with this resistance R and constitute the starting drive that this reality is invented jointly.Power supply AC is the three-phase alternating source, its each phase (certainly, also can be only therein one mutually or two-phase) all be serially connected with mains switch S1, starting drive and heating element successively.In the present embodiment, heating element is to prop up the infrared lamp group that infrared lamp is formed in parallel by n, and n is the positive integer more than or equal to 1.Certainly, this infrared lamp group is not limited to be formed in parallel, and it also can combine by the mode of series connection or series/parallel combination.
The start-up course of said system is as follows: at first closed mains switch S1, thereby make power supply AC, resistance R, infrared lamp form power circuit and start infrared lamp, can play the effect of dividing potential drop current limliting as the resistance R that starts impedance this moment, thereby be reduced in the immediate current in the system when starting infrared lamp; Treat that infrared lamp starts back starting switch S2 closure fully, will start impedance two terminal shortcircuits, make power supply AC and infrared lamp form new loop, to finish start-up operation and to make infrared lamp operate as normal under rated condition.
In actual applications, the break-make of mains switch S1 and starting switch S2 can be by staff's manual operation, and preferably the automatic control by the software/hardware system that sets in advance realizes.For example, can adopt the time relay to realize automatic operation as starting switch S2, set in advance to the time relay complete start-up time measuring good heating element in advance by experiment, when arriving default heating element after complete start-up time, this time relay promptly moves, to start impedance two terminal shortcircuits, thereby realize the automatic control of circuit.
When adopting resistance as the startup impedance, its span can be calculated by following formula:
Wherein, n is the quantity of infrared lamp in the single-phase loop, I
NBe the rated current in each phase loop, V is a supply voltage, R
CBe the cold-state resistance of single infrared lamp, R
XBe the resistance value that satisfies condition.Illustrate the process of application formula (1) calculated resistance below.
At present, the running parameter of infrared lamp commonly used is, rated operational voltage 100V, and rated power 1.6KW, the resistance of fluorescent tube under the nominal operation state is 6.25 Ω, rated current 16A.Calculate by 40 infrared lamps that whenever are in parallel, the current value in each phase loop is under the nominal operation state: I
N=40 * 16A=640A.Know again, 1/2 of the resistance when the cold conditions resistance of infrared lamp is about the nominal operation state, i.e. 3.125 Ω, substitution formula (1) can be tried to achieve R
X＞0.078125 Ω.Here, 0.078125 Ω is the critical resistance value that satisfies partial pressure conditions, and the resistance of institute's series resistance should be equal to or greater than this critical value at least.Certainly, also can make the resistance of institute's series resistance adjustable continuously in satisfying the scope of partial pressure conditions, so that control starting current more accurately.
For verifying above-mentioned conclusion, can get a resistance and calculate as starting impedance greater than the critical resistance value, for example get the resistance of one 0.1 Ω, other parameter constant, then the starting current of each phase can calculate by following formula in the said system:
Wherein: I
XSBe each starting current value in mutually after the series resistance.
As seen, the starting drive that is used for improving the circuit starting current provided by the invention can reduce starting current effectively.
It is pointed out that in the present embodiment and to adopt the resistance R element, be adapted at using in electric current is less, power the is lower situation as the starting drive that starts impedance.When the power in whole loop and electric current are all higher, can consume certain electric energy as the resistance that starts impedance, reduce energy utilization rate.The current value that calculates gained with formula (2) is an example, and resistance is that the power that resistance consumed of 0.1 Ω is:
P=I
2R=561.4
2* 0.1W=31.5KW formula (3)
As seen, the magnitude of power that resistance consumed is very large.Thus, the present invention proposes a kind of improvement project at first kind of execution mode shown in Figure 2, as shown in Figure 3.
Among Fig. 3, the application system of second kind of starting drive that embodiment provided of the present invention is with the difference of above-mentioned first kind of execution mode, and it adopts the inductance L element to replace the resistance R element as starting impedance.
Except that starting the impedance difference, the structure of the starting drive that present embodiment provides, start-up course and relevant parameter and first kind of execution mode shown in Figure 2 are similar, do not repeat them here.
In the present embodiment, can calculate by following formula as the span of the inductance L that starts impedance:
Wherein, L
XBe the inductance value of being asked that satisfies condition, ω is the specified angular frequency (its value is 100 π) of power supply, and n, I
N, V and R
CSimilar etc. each parameter in parameter and the formula (1).To can try to achieve L as calculated in each numerical value substitution formula (4)
X〉=0.4307mH, here, 0.4307mH is the threshold inductance value that satisfies partial pressure conditions, and the inductance value of being connected should be equal to or greater than this critical value at least.Certainly, can make the inductance value of being connected adjustable continuously in satisfying the scope of partial pressure conditions equally, so that control starting current more accurately.
In the present embodiment, the starting current of each phase can calculate by following formula:
Wherein, I
XSEach starting current value in mutually after the expression series inductance.
Be not difficult to verify, adopt inductance element as starting the starting current that impedance can effectively reduce system equally.And, adopting inductance element to be as the advantage that starts impedance with respect to first kind of execution mode shown in Figure 2, the energy that itself consumed seldom so can effectively reduce the power loss of system, improves energy utilization rate.
See also Fig. 4, the application system of the starting drive that the third embodiment of the present invention is provided, as the improvement project of another kind at first kind of execution mode shown in Figure 2, its difference is, adopts the capacitor C element to replace the resistance R element as starting impedance.
Except that starting the impedance difference, the structure of the starting drive that present embodiment provides, start-up course and relevant parameter and first kind of execution mode shown in Figure 2 are similar, do not repeat them here.
In the present embodiment, the span of capacitor C can be calculated by following formula:
Wherein, C
XBe the capacitance that satisfies condition, it can be set to the continuously adjustable form of capacitance equally, more accurately to control starting current.
The starting current of each phase can calculate by following formula:
Wherein, I
XSEach starting current value in mutually after the expression series capacitance.
When adopting the capacitor C element to use as the startup impedance, be similar to the situation that adopts the inductance L element in second kind of execution mode shown in Figure 3, therefore the energy that himself consumed seldom, also can effectively reduce the power loss of system, improves energy utilization rate.
As seen from the above description, the starting drive that is used for improving the circuit starting current provided by the invention, when system power and all smaller situation of electric current, can adopt in resistance, inductance and/or the electric capacity any one as starting the moment starting current that impedance is used to reduce system; And when system power relative with current value when higher because the consumed power of resistive element own is bigger, so preferably adopt inductance or electric capacity as starting impedance.
It is to be noted, starting selecting for use of impedance is not limited thereto, in same starting drive, also can adopt two or three in the electric components such as resistance, inductance and electric capacity to use as starting impedance simultaneously, as long as take reasonable connection way and choose suitable parameter, it can play the effect of effective reduction system moment starting current equally.
In addition, the present invention also provides a kind of method that is used for improving the circuit starting current, and it utilizes the starting drive that is composed in parallel by startup impedance and starting switch can effectively reduce the moment starting current of system.See also Fig. 5, the invention provides the method that is used for improving the circuit starting current and specifically comprise the steps:
101) to heating element tandem promoter device, this starting drive comprises startup impedance and the starting switch that is connected in parallel to each other.
102) measure heating element complete start-up time by experiment.
103) start heating element, disconnect starting switch simultaneously, make heating element form path, this path is realized the dividing potential drop current limliting, thereby be reduced in the immediate current in this path when starting heating element so that start impedance with starting impedance.
104) judge whether begin to start the time that is continued behind the heating element arrives above-mentioned complete start-up time, if then forward step 105 to); If not, then keep step 103) in state.
105) after element to be heated started fully, closed starting switch will start impedance two terminal shortcircuits, made heating element and closed starting switch form path, thereby guaranteed that heating element works under rated operational current.
Provided by the inventionly be used for improving in the method for circuit starting current, heating element, start impedance and value condition and computational methods etc. all similar with starting drive provided by the present invention, therefore repeat no more.
In addition, the present invention also provides a kind of electric power system that can improve starting current in the circuit, comprises the three-phase alternating source, wherein at least onely is serially connected with mutually: mains switch, in order to control the break-make of whole electric power system; Heating element is converted into thermal radiation in order to the electric energy that power supply is provided; And starting drive provided by the present invention, it is serially connected with between mains switch and the heating element, the immediate current when starting heating element in order to be reduced in the circuit.
In addition, the present invention also provides a kind of electric power system that can improve starting current in the circuit, comprises the three-phase alternating source, wherein at least onely is serially connected with mutually: mains switch, in order to control the break-make of whole electric power system; Heating element is converted into thermal radiation in order to the electric energy that power supply is provided; In addition, this electric power system has also been used the method that is used for improving the circuit starting current provided by the present invention, the immediate current when starting heating element in order to be reduced in the circuit.
In sum, provided by the present invention be used for improving the circuit starting current starting drive and method, can effectively reduce the moment starting current of system by startup impedance parallel with one another and starting switch, simple to operate, be easy to realize.And, starting switch is closed and will start the impedance short circuit after heating element starts fully, this moment, system without any extras, therefore can effectively avoid the problem of harmonic pollution and electromagnetic compatibility etc. in the system except that power supply and heating element, improved the fail safe and the stability of system.
The electric power system that can improve starting current in the circuit provided by the invention owing to used starting drive provided by the present invention and/or method, can effectively reduce the moment starting current of system equally, improves the fail safe and the stability of system.
Although be that example is illustrated starting drive, method and the electric power system that is used for improving the circuit starting current provided by the invention with the heating element in the previous embodiment of the present invention, but the present invention is not limited thereto, but also can be applied to include in the circuit of other types load, to reduce the moment starting current in the circuit.
Be understandable that above execution mode only is the illustrative embodiments that adopts for principle of the present invention is described, yet the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement also are considered as protection scope of the present invention.
Claims (16)
1. starting drive that is used for improving the circuit starting current, it is connected with heating element, immediate current when starting described heating element in the circuit in order to be reduced in, it is characterized in that, described starting drive comprises startup impedance and the starting switch that is connected in parallel to each other, described starting switch is in off-state when starting described heating element, make described heating element and described startup impedance form path, so that described startup impedance realizes the dividing potential drop current limliting to this path, thereby be reduced in the immediate current in this path when starting described heating element; Described starting switch is in closure state after described heating element starts fully, with described startup impedance two terminal shortcircuits, make the starting switch of described heating element and described closure form path, thereby described heating element is worked under rated current.
2. starting drive according to claim 1, it is characterized in that, described starting switch comprises the time relay, it arrives heating element i.e. action after complete start-up time, with with described startup impedance two terminal shortcircuits, thereby make the starting switch of described heating element and described closure form path.
3. starting drive according to claim 1 is characterized in that, described startup impedance comprises resistance and/or inductance and/or electric capacity.
4. starting drive according to claim 3 is characterized in that described heating element comprises the infrared lamp that n props up parallel connection and/or is cascaded, and n is the positive integer more than or equal to 1.
5. starting drive according to claim 4 is characterized in that, the span of described resistance satisfies condition shown in the following formula:
Wherein, n is the quantity of infrared lamp in the single-phase loop,
I
NBe the rated current in each phase loop,
V is a supply voltage,
R
CBe the cold-state resistance of single infrared lamp,
R
XBe the resistance value that satisfies condition.
6. starting drive according to claim 4 is characterized in that, the span of described inductance satisfies condition shown in the following formula:
Wherein, n is the quantity of infrared lamp in the single-phase loop,
I
NBe the rated current in each phase loop,
V is a supply voltage,
R
CBe the cold-state resistance of single infrared lamp,
ω is the specified angular frequency of power supply,
L
XBe the inductance value that satisfies condition.
7. starting drive according to claim 4 is characterized in that, the span of described electric capacity satisfies condition shown in the following formula:
Wherein, n is the quantity of infrared lamp in the single-phase loop,
I
NBe the rated current in each phase loop,
V is a supply voltage,
R
CBe the cold-state resistance of single infrared lamp,
ω is the specified angular frequency of power supply,
C
XBe the capacitance that satisfies condition.
8. a method that is used for improving the circuit starting current is characterized in that, comprises the steps:
10) to described heating element tandem promoter device, described starting drive comprises startup impedance and the starting switch that is connected in parallel to each other;
20) start described heating element, disconnect described starting switch simultaneously, make described heating element and described startup impedance form path,, thereby be reduced in the immediate current in this path when starting described heating element so that described startup impedance realizes the dividing potential drop current limliting to this path;
30) treat that described heating element starts fully after, closed described starting switch with described startup impedance two terminal shortcircuits, makes the starting switch of described heating element and described closure form path, thereby guarantees that described heating element works under rated operational current.
9. method according to claim 8, it is characterized in that, in described step 20) and step 30) between also comprise such step: promptly, judge whether begin to start the time that is continued behind the described heating element arrives complete start-up time, if then forward step 30 to); If not, then forward step 20 to).
10. method according to claim 8 is characterized in that, described startup impedance comprises resistance and/or inductance and/or electric capacity.
11. method according to claim 10 is characterized in that, described heating element comprises the infrared lamp that n props up parallel connection and/or is cascaded, and n is the positive integer more than or equal to 1.
12. method according to claim 11 is characterized in that, the span of described resistance satisfies condition shown in the following formula:
Wherein, n is the quantity of infrared lamp in the single-phase loop,
I
NBe the rated current in each phase loop,
V is a supply voltage,
R
CBe the cold-state resistance of single infrared lamp,
R
XBe the resistance value that satisfies condition.
13. method according to claim 11 is characterized in that, the span of described inductance satisfies condition shown in the following formula:
Wherein, n is the quantity of infrared lamp in the single-phase loop,
I
NBe the rated current in each phase loop,
V is a supply voltage,
R
CBe the cold-state resistance of single infrared lamp,
ω is the specified angular frequency of power supply,
L
XBe the inductance value that satisfies condition.
14. method according to claim 11 is characterized in that, the span of described electric capacity satisfies condition shown in the following formula:
Wherein, n is the quantity of infrared lamp in the single-phase loop,
I
NBe the rated current in each phase loop,
V is a supply voltage,
R
CBe the cold-state resistance of single infrared lamp,
ω is the specified angular frequency of power supply,
C
XBe the capacitance that satisfies condition.
15. the electric power system that can improve starting current in the circuit comprises power supply, described power supply is the three-phase alternating source, wherein at least onely is serially connected with mutually: mains switch, in order to control the break-make of whole electric power system; Heating element is converted into thermal radiation in order to the electric energy that described power supply is provided; It is characterized in that, at least one in the three-phase also includes as any described starting drive in the claim 1 to 7 in mutually, it is serially connected with between described mains switch and the described heating element, the immediate current when starting described heating element in order to be reduced in the circuit.
16. the electric power system that can improve starting current in the circuit comprises power supply, described power supply is the three-phase alternating source, wherein at least onely is serially connected with mutually: mains switch, in order to control the break-make of whole starting drive; Heating element is converted into thermal radiation in order to the electric energy that described power supply is provided; It is characterized in that described electric power system has been used as any described method in the claim 8 to 14, the immediate current when starting described heating element in the circuit in order to be reduced in.
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| CN102548167A (en) * | 2010-12-24 | 2012-07-04 | 海洋王照明科技股份有限公司 | Start-up circuit of metal halide lamp |
| CN102945053A (en) * | 2012-11-22 | 2013-02-27 | 王兆进 | Infrared dryer temperature control device based on programmable logic controller (PLC) |
| CN106023537A (en) * | 2016-07-05 | 2016-10-12 | 柏宜照明（上海）股份有限公司 | Starting control system and starting control method for combustible gas detector |
| CN113225850A (en) * | 2021-05-06 | 2021-08-06 | 阳光电源股份有限公司 | Heating control circuit and photovoltaic system |
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- 2009-02-19 CN CN200910078157A patent/CN101815389A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102548167A (en) * | 2010-12-24 | 2012-07-04 | 海洋王照明科技股份有限公司 | Start-up circuit of metal halide lamp |
| CN102548167B (en) * | 2010-12-24 | 2014-06-11 | 海洋王照明科技股份有限公司 | Start-up circuit of metal halide lamp |
| CN102945053A (en) * | 2012-11-22 | 2013-02-27 | 王兆进 | Infrared dryer temperature control device based on programmable logic controller (PLC) |
| CN102945053B (en) * | 2012-11-22 | 2015-03-18 | 王兆进 | Infrared dryer temperature control device based on programmable logic controller (PLC) |
| CN106023537A (en) * | 2016-07-05 | 2016-10-12 | 柏宜照明（上海）股份有限公司 | Starting control system and starting control method for combustible gas detector |
| CN113225850A (en) * | 2021-05-06 | 2021-08-06 | 阳光电源股份有限公司 | Heating control circuit and photovoltaic system |
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Application publication date: 20100825 |