CN201919217U - Load driving device and system - Google Patents
Load driving device and system Download PDFInfo
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- CN201919217U CN201919217U CN2010206824125U CN201020682412U CN201919217U CN 201919217 U CN201919217 U CN 201919217U CN 2010206824125 U CN2010206824125 U CN 2010206824125U CN 201020682412 U CN201020682412 U CN 201020682412U CN 201919217 U CN201919217 U CN 201919217U
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Abstract
The utility model discloses a load driving device, which comprises an electric energy supply unit, a sampling unit and an output voltage controller. The electric energy supply unit comprises at least two output voltage adjustable units, an input end of the sampling unit is connected with an optional end of a load unit so as to sample current of the end, sampled current is transmitted to the output voltage controller, an input end of the output voltage controller is connected with an output end of the sampling unit, the output voltage controller outputs voltage control signals to the output voltage adjustable units according to the sampled current so as to control difference value between output voltage of each output voltage adjustable unit and the largest load voltage in a load branch not to be larger than preset difference value threshold, and the difference value threshold is larger than or equal to zero. A load driving system can increase reliability of the driving device and can reduce complexity of circuits.
Description
Technical field
The utility model relates to circuit field, relates in particular to a kind of load driving system.
Background technology
Existing light-emitting diode (LED) the light fixture overwhelming majority is fitting structure and the design with reference to traditional gaseous discharge lamp and tungsten lamp, the conventional thought of a driver of a light source configuration and traditional single channel or multichannel output AC/DC converter technique on drive scheme, have also been followed.As shown in Figure 1, comprise a light source and a driver in the light fixture, carry out the control of described light fixture by panel switches.Wherein, as shown in Figure 1, described driver is arranged at lamp interior, near light source.
Concrete, provided a kind of particular circuit configurations of LED light fixture among Fig. 2, wherein, the Adjustable Output Voltage voltage source 201 of prime is by minimum value sample circuit 202, the multi-channel linear of sampling back level is adjusted the minimum value of adjusting pipe Q1～Qn drain voltage in the current-limiting circuit 203, and this minimum value is done FEEDBACK CONTROL by output voltage controlling circuit 204, make this minimum value remain a less value, thereby the voltage of the paths of LEDs load that the output voltage V o that makes Adjustable Output Voltage voltage source 201 is higher than voltage in the LED multi-path load all the time is slightly high, make the linear current-limiting circuit 203 of adjusting guarantee on the basis of every paths of LEDs load by the current-limiting points constant-current driving that power consumption is all the time near minimum.Wherein, Adjustable Output Voltage voltage source 201, minimum value sample circuit 202 and output voltage controlling circuit 204 constitute the driver of light fixture; The linearity of LED multi-path combination and multichannel is adjusted current-limiting circuit (each group LED combination and corresponding linearity are adjusted current-limiting circuit and constituted the LED branch road) and is constituted light source cell.
But above circuit structure has following shortcoming:
At first, minimum value sample circuit in the driver carries out voltage sample from late-class circuit for convenience, linearity in each LED branch road is adjusted current-limiting circuit 203 need be encapsulated in internal drive usually, and it is bigger to adjust the pipe loss when pressure reduction is big between the LED multi-path branch road, causes the driver heating serious; And driver generally is positioned over the LED lamp interior, and near led light source, then temperature will be higher, have a strong impact on the reliability of driver;
Secondly, the output voltage controlling circuit 204 of the Adjustable Output Voltage voltage source 201 of prime need and linear be adjusted sampled voltage the current-limiting circuit 203 common late-class circuits that constitute from every paths of LEDs, makes wiring complexity between the Adjustable Output Voltage voltage source 201 of prime and late-class circuit; And; when open fault appears in certain paths of LEDs load; the drain voltage of this route adjustment pipe is zero; therefore; need be for every paths of LEDs load additionally increase the operate as normal that open-circuit-protection could guarantee the LED load of not breaking down in other roads in this case, this has further increased the complexity that realizes circuit.
The utility model content
In view of this, the technical problems to be solved in the utility model is, a kind of load drive device and system are provided, and can improve the reliability of drive unit; And, can also reduce the complexity of circuit.
For this reason, the utility model embodiment adopts following technical scheme:
The utility model embodiment provides a kind of load drive device, comprising:
Electric energy provides the unit, comprises at least two Adjustable Output Voltage unit, and first output of each described Adjustable Output Voltage unit connects first output that electric energy provides the unit, and second output connects second output that electric energy provides the unit;
The input that carries out the sampling unit of current sample provides arbitrary end of unit to be connected with electric energy, output with carry out electric energy and provide the input of the output voltage controller of unit output voltage control to be connected;
Output voltage controller, its output that carries out voltage control signal output connects electric energy respectively provides each Adjustable Output Voltage unit in the unit, be not more than the preset difference value threshold value with the difference between the maximum load voltage in the load branch of the output voltage of controlling each Adjustable Output Voltage unit and back level, described difference threshold is more than or equal to zero.
Each Adjustable Output Voltage unit comprises:
Carry out the switch change-over main circuit of voltage transformation;
Voltage loop according to the voltage control signal control switch conversion main circuit output voltage of sampled voltage and output voltage controller, its input that carries out the output voltage sampling is connected with two outputs of switch change-over main circuit, and output connects the switch change-over main circuit.
Described Adjustable Output Voltage unit further comprises:
The change direction of control switch conversion main circuit output voltage and the current-sharing unit that changes in the opposite direction of sample rate current, its input that carries out current sample is connected with arbitrary output of switch change-over main circuit, and output connects the input of Voltage loop.
Described Voltage loop comprises:
First resistance and second resistance string are connected between two outputs of corresponding switch change-over main circuit;
First resistance is connected the inverting input of first operational amplifier with the tie point of second resistance, this inverting input also connects the output of output voltage controller, and, also connect the output of first operational amplifier by compensating network;
The normal phase input end of first operational amplifier connects default output voltage values;
The output of first operational amplifier is as the output of Voltage loop, the output voltage of control switch conversion main circuit.
The current-sharing unit comprises:
The output that is serially connected with the switch change-over main circuit and electric energy provide the 3rd resistance between the corresponding output of unit; The 3rd resistance and the end that electric energy provides the unit output to be connected connect the inverting input of first operational amplifier by the 4th resistance.
The current-sharing unit comprises:
The output that is serially connected with the switch change-over main circuit and electric energy provide the 3rd resistance between the corresponding output of unit; The 3rd resistance and the end that electric energy provides the unit output to be connected connect the normal phase input end of second operational amplifier by the 4th resistance; The inverting input of second operational amplifier also connects the output of second operational amplifier by the 5th grounding through resistance by the 6th resistance;
The output of second operational amplifier connects the inverting input of first operational amplifier.
Connect by dimmer switch between the output that electric energy provides the unit and the corresponding input of load unit.
Described electric energy provides unit, sampling unit and output voltage controller assembled package, load unit individual packages.
The output of Adjustable Output Voltage unit and electric energy provide to be in series with between the corresponding output of unit and carry out the fault that fault cuts off and cut off circuit.
The utility model also provides a kind of load driving system, comprising:
Load unit, described load unit comprise at least one road load branch, and first end of described load branch connects first end of load unit, and second end of load branch connects second end of load unit;
Electric energy provides the unit, comprises at least two Adjustable Output Voltage unit, and first output of each described Adjustable Output Voltage unit connects first output that electric energy provides the unit, and second output connects second output that electric energy provides the unit; Electric energy provides first output of unit to connect first end of load unit, and second output connects second end of load unit;
The input that carries out the sampling unit of current sample provides arbitrary end of unit to be connected with electric energy, output with carry out electric energy and provide the input of the output voltage controller of unit output voltage control to be connected;
Output voltage controller, its output that carries out voltage control signal output connects electric energy respectively provides each Adjustable Output Voltage unit in the unit, be not more than the preset difference value threshold value with the difference between the maximum load voltage in the load branch of the output voltage of controlling each Adjustable Output Voltage unit and back level, described difference threshold is more than or equal to zero.
Described load branch comprises: the collections of loads of serial connection and the current-limiting circuit of this load branch.
Current-limiting circuit comprises:
First switch and the resistance of serial connection, the two ends of resistance connect two inputs of Current limited Control device respectively, and the output of Current limited Control device is controlled the switch of first switch, so that the electric current of corresponding load branch is not higher than the predetermined current value.
Technique effect for technique scheme is analyzed as follows:
Electric energy provides the unit to comprise at least two Adjustable Output Voltage unit, and the output parallel connection of Adjustable Output Voltage unit has realized the dilatation of system, and can realize the redundancy backup that electric energy provides, thereby has improved the reliability of drive unit; And, the input of sampling unit provides arbitrary end of unit to be connected with electric energy, provide the total current of unit output to carry out current sample to electric energy, that is to say the total current of back level load branch is carried out current sample, thereby can be with drive unit and load unit separate packages, and can increase the distance that is provided with between drive unit and the load unit, thereby reduce the heating source of drive unit, further improve the reliability of drive unit; It is minimum that simultaneously the output voltage of Adjustable Output Voltage unit makes the loss of current-limiting circuit of back level load unit, thereby reduced the heating of load unit, further improved the reliability of load driving system.
And electric energy provides the transmission that can realize electric energy between unit and the load unit by two connecting lines, and wiring is simple, has reduced the complexity of circuit; And; when the quantity of load branch changes; during as open circuit or increase branch road; control by collecting unit and output voltage control unit; make electric energy provide the unit to adjust output voltage automatically, realize the constant-current driving of all the other load branch, thereby need not for each road load branch open loop protection circuit to be set separately; thereby further reduced the complexity of circuit, saved cost.
Description of drawings
Fig. 1 is provided with structural representation for the prior art light fixture;
Fig. 2 is the particular circuit configurations schematic diagram of prior art LED light fixture;
Fig. 3 is a kind of load driving system structural representation of the utility model embodiment;
Fig. 4 is the another kind of load driving system structural representation of the utility model embodiment;
Fig. 5 is another load driving system structural representation of the utility model embodiment;
Fig. 6 is the specific implementation examples of circuits of each part in the utility model embodiment load driving system;
Fig. 7 is the another kind of implementation structure schematic diagram of the utility model embodiment flow equalizing circuit;
Fig. 8 is the implementation structure schematic diagram of current-limiting circuit in the utility model embodiment load branch.
Embodiment
Below, be described with reference to the accompanying drawings the realization of the utility model embodiment load driving system.
The load driving system of the utility model embodiment comprises:
Load unit, described load unit comprise at least one road load branch, and first end of described load branch connects first end of load unit, and second end of load branch connects second end of load unit;
Electric energy provides the unit, comprises at least two Adjustable Output Voltage unit, and first output of each described Adjustable Output Voltage unit connects first output that electric energy provides the unit, and second output connects second output that electric energy provides the unit; Electric energy provides first output of unit to connect first end of load unit, and second output connects second end of load unit;
The input that carries out the sampling unit of current sample provides arbitrary end of unit to be connected with electric energy, output with carry out electric energy and provide the input of the output voltage controller of unit output voltage control to be connected;
Output voltage controller, its output that carries out voltage control signal output connects electric energy respectively provides each Adjustable Output Voltage unit in the unit, be not more than the preset difference value threshold value with the difference between the maximum load voltage in the load branch of the output voltage of controlling each Adjustable Output Voltage unit and back level, described difference threshold is more than or equal to zero.
Wherein, the load drive device that electric energy provides unit, sampling unit and output voltage controller formation to carry out the utility model embodiment of load unit driving, and the load unit of this load drive device and back level constitutes the described load driving system of the utility model embodiment jointly.
For above load drive device and system, electric energy provides the unit to comprise at least two Adjustable Output Voltage unit, and the output parallel connection of Adjustable Output Voltage unit has realized the dilatation of system, and can realize the redundancy backup that electric energy provides, thereby improve the reliability of drive unit; And, the input of sampling unit is connected with arbitrary end of load unit, total current by load branch is carried out current sample, and do not need the every road of level, back load branch is sampled, thereby can be with load unit and drive unit separate packages, and can increase the distance that is provided with between drive unit and the load unit, thereby reduce the heating source of drive unit, further improve the reliability of drive unit; Further, described current-limiting circuit can be arranged on the load substrate of its place load branch, helps heat radiation, has improved the reliability of current-limiting circuit; It is minimum that simultaneously the output voltage of Adjustable Output Voltage unit makes the loss of current-limiting circuit of back level load unit, thereby reduced the heating of load unit, further improved the reliability of load driving system.
And electric energy provides the transmission that can realize electric energy between unit and the load unit by two connecting lines, and wiring is simple; And; when the quantity of load branch changes; during as open circuit or increase branch road; control by sampling unit and output voltage control unit; make electric energy provide the unit to adjust output voltage automatically, realize the constant-current driving of all the other load branch, thereby need not for each road load branch open loop protection circuit to be set separately; thereby further reduced the complexity of circuit, saved cost.
Wherein, electric energy provides unit, sampling unit and the output voltage controller can assembled package, and as carrying out the drive unit that load unit drives, load unit can individual packages.In addition, drive unit also can be: sampling unit and output voltage controller assembled package, electric energy provides each Adjustable Output Voltage unit of unit can modularization or individual packages respectively, when any Adjustable Output Voltage unit breaks down situation, and convenient the replacement.In addition, load unit can also be packaged into one or more unit according to actual needs, does not limit here.For example, the several load branch is formed a unit, and other road load branch are formed other unit; Perhaps, also can be packaged into a unit by all road load branch.
Here by drive unit these load units are carried out centralized control, reduced the circuit complexity of load driving system, and then reduced system and realized cost; And because drive unit and load unit difference individual packages, drive unit need not near load unit, thereby has reduced the temperature of drive unit, has improved the reliability of drive unit, and then has improved the reliability of load driving system.
The above drive unit and the load unit of individual packages be corresponding respectively driver and the light source cell that carries out the light source driving in illuminator.In illuminator, the unit after the encapsulation also is light source cell.By driver these light source cells are carried out centralized control, reduced the circuit complexity of illuminator, and then reduced system and realized cost; And because driver and light source cell difference individual packages, driver need not near light source cell, thereby has reduced the temperature of driver, has improved the reliability of driver, and then has improved the reliability of illuminator.
Below, by specific embodiment the load drive device of the utility model embodiment and the realization of system are described in more detail.
Fig. 3 is a kind of load driving system structural representation of the utility model embodiment, and as shown in Figure 3, this system comprises:
Electric energy provides unit 32, comprises at least two Adjustable Output Voltage unit 321, and first output of each described Adjustable Output Voltage unit 321 connects first output that electric energy provides unit 32, and second output connects second output that electric energy provides unit 32; Electric energy provides first output of unit 32 to connect first end of load unit 31, and second output connects second end of load unit 31;
Electric energy provides the unit to comprise at least two Adjustable Output Voltage unit, thereby when wherein part Adjustable Output Voltage unit breaks down, other Adjustable Output Voltage unit can continue normal output current, still can satisfy the required rated current of load, thereby make electric energy provide the unit to have the redundancy backup ability, improved the reliability of drive unit in the load driving system.
Sampling unit 33, input provides arbitrary end of unit 32 to be connected with electric energy, carries out the current sample of this end, and sample rate current is sent to output voltage controller 34; Here, described sample rate current both can be the total current of all Adjustable Output Voltage unit output, also can be the average current of all Adjustable Output Voltage unit output currents.
Particularly, output voltage controller can realize by digital control approach when realizing, when sampling be the total current of output the time, adjust every road output voltage the concrete course of work can for:
According to the variation relation of sample rate current and output voltage, determine the adjustment direction and the step-length of the output voltage of Adjustable Output Voltage unit;
According to the size that described adjustment direction and step-length are regulated the output voltage of each described Adjustable Output Voltage unit, make the difference between the load voltage of a road the highest load branch of output voltage and voltage be not more than default difference threshold.
The specific implementation of above process can for:
At first, according to the variation relation of sample rate current and output voltage, determine the adjustment direction of the output voltage size of Adjustable Output Voltage unit, that is:
(1) change direction of sample rate current during with a fixed step size boosted output voltages, is judged in the Adjustable Output Voltage unit on last output voltage basis, if described sample rate current increases with the rising of output voltage, then the adjustment direction of output voltage is for raising; If described sample rate current is constant with the rising of output voltage, then the adjustment direction of output voltage is for reducing;
When (2) the Adjustable Output Voltage unit reduces output voltage with a fixed step size on last output voltage basis, judge the change direction of sample rate current, if described sample rate current is constant with the reduction of output voltage, then the adjustment direction of output voltage is for reducing; If described sample rate current reduces with the reduction of output voltage, then the adjustment direction of output voltage is for raising;
Then, according to the adjustment direction of described output voltage size, regulate the size of the output voltage of described Adjustable Output Voltage unit according to certain default step-length;
Wherein, can regulate output voltage or repeat above-mentioned steps and regulate output voltage according to above-mentioned steps, the difference of load voltage that makes a road the highest load branch of output voltage and voltage be in the difference threshold of presetting.
Wherein above-described load voltage is meant: the voltage at the collections of loads two ends of connecting in the load branch.
Preferably, as shown in Figure 3, Adjustable Output Voltage unit 321 can comprise:
Switch change-over main circuit 3211 carries out voltage transformation to input voltage under the control of Voltage loop;
In addition, Adjustable Output Voltage unit 321 can also comprise:
Current-sharing unit 3213, be connected with arbitrary output of switch change-over main circuit 3211, electric current to output is sampled, sampled signal is transferred to the input of Voltage loop 3212, with the change direction of output voltage and changing in the opposite direction of sample rate current by Voltage loop 3212 control switch conversion main circuits 3211.
Described current-sharing unit is controlled the output voltage of switch change-over main circuit by Voltage loop, reaches the current-sharing to Adjustable Output Voltage unit institute output current; When electric energy provides in the unit each Adjustable Output Voltage unit operate as normal or the adjustable cell failure of part is arranged, may be variant between each road output voltage, even very little voltage differences all can cause the current unevenness weighing apparatus between the Adjustable Output Voltage unit; The effect of flow equalizing circuit is to realize that the equilibrium of output current between a plurality of Adjustable Output Voltage unit distributes under above-mentioned any situation.
In addition, described load branch can comprise: the collections of loads of serial connection and corresponding current-limiting circuit.
Wherein, described collections of loads can be the LED lamp of a plurality of serial connections in the background technology, also can not limit here for the DC load of other similar LED.
Preferably, in order to realize the redundancy backup function, promptly when one or more Adjustable Output Voltage unit breaks down situation, all the other Adjustable Output Voltage unit still can satisfy the requirement of load, need provide between the corresponding output of unit fault of series connection to cut off circuit at the output of each Adjustable Output Voltage unit and electric energy.Described fault is cut off circuit can be diode, as shown in Figure 4; Also can be by the single-way switch pipe (as metal-oxide-semiconductor) under the fault-signal control, or other switching devices, as relay; Can also be devices such as fuse.When described fault partition circuit is fuse or relay, when the Adjustable Output Voltage unit of correspondence is operate as normal, described fault is cut off circuit and is presented Low ESR, and when the Adjustable Output Voltage unit of correspondence broke down, described fault was cut off circuit and presented high impedance; When described fault partition circuit is metal-oxide-semiconductor, the direction of the body diode of metal-oxide-semiconductor is identical with the output current direction of corresponding Adjustable Output Voltage unit, when the Adjustable Output Voltage unit of correspondence is operate as normal, described metal-oxide-semiconductor conducting, when the Adjustable Output Voltage unit of correspondence broke down, described metal-oxide-semiconductor turn-offed; When described fault was cut off circuit and is diode, the direction of diode was identical with the output current direction of corresponding Adjustable Output Voltage unit.Each fault is cut off circuit and can be arrived together with corresponding Adjustable Output Voltage unit package, also can be the module that encapsulates separately.
When described load is the LED load, as shown in Figure 5, can connect by a dimmer switch S between the output that electric energy provides unit 320 and the corresponding input of load unit 310, when dimming control signal control dimmer switch S conducting, the LED load provides the unit to obtain electric current from the electric energy of prime, when dimming control signal control dimmer switch S turn-offs, there is not electric current in the LED load, by changing the duty ratio of dimmer switch S, can change the mean value of the total current of back level LED load, reach purpose LED load light modulation.
Below, the specific implementation to each unit is respectively described.
Wherein, the switch change-over main circuit can pass through the AC-DC converter, or the DC-DC converter, that is to say that the input voltage vin of described switch change-over main circuit can be an alternating voltage, also can be direct voltage; Here do not limit.
As shown in Figure 6, described Voltage loop 3212 can comprise: first resistance R 1 and second resistance R 2 are serially connected with between two outputs of corresponding switch change-over main circuit 3211; First resistance R 1 is connected the inverting input of the first operational amplifier IC1 with the tie point of second resistance R 2, this inverting input also connects the output of output voltage controller 34, and, also connect the output of the first operational amplifier IC1 by compensating network; The normal phase input end of the first operational amplifier IC1 connects default output voltage values Vref; The output of the first operational amplifier IC1 is as the output of Voltage loop 3212, and the output voltage of control switch conversion main circuit 3211 is default output voltage values Vref; Described compensating network can be any compensating network structure of closed control circuit, in order to realize the closed-loop control of Voltage loop 3212, the closed-loop adjustment of output voltage.
The voltage control signal of output voltage controller 34 outputs, output voltage sampled signal with the tie point place of first resistance R 1 and second resistance R 2, after the two stack, be input to the inverting input of Voltage loop 3212 as feedback signal, after the voltage reference signal of Voltage loop 3212 normal phase input ends is compared, through the adjusting of Voltage loop 3212, the output voltage size of control switch conversion main circuit 3211.
Described current-sharing unit can comprise: the output that is serially connected with switch change-over main circuit 3211 and electric energy provide the 3rd resistance R 3 between the corresponding output of unit 32; The 3rd resistance R 3 is passed through the inverting input that the 4th resistance R 4 connects the first operational amplifier IC1 with the end that electric energy provides unit 32 outputs to be connected.
By this connection, the output current I1 of current-sharing unit sampling switch change-over main circuit, be directly inputted to the inverting input of the first operational amplifier IC1 in the Voltage loop by the 4th resistance R 4, make the output voltage of switch change-over main circuit reduce, or raise with the reduction of electric current I 1 with the rising of output current I1.
But, general current-sharing unit is less by the electric current I 1 that the 3rd resistance R 3 samples, can not be directly inputted to Voltage loop and carry out the control of output voltage, at this moment, can be before sample rate current be transferred to the inverting input of the first operational amplifier IC1, carry out the amplification of sample rate current, as shown in Figure 7, described the 4th resistance R 4 connects the normal phase input end of one second operational amplifier IC2, the inverting input of the second operational amplifier IC2 also connects the output of the second operational amplifier IC2 by the 5th resistance R 5 ground connection by the 6th resistance; The output of the second operational amplifier IC2 connects the inverting input of the first operational amplifier IC1.
Wherein, the value of the 5th resistance R 5 and the 6th resistance R 6 is decided by the required amplification multiple of sample rate current, can independently be provided with in actual applications, does not give unnecessary details here.
The realization example of current-limiting circuit in the load branch has been shown among Fig. 8, described current-limiting circuit can be adjusted circuit for linearity, concrete, each current-limiting circuit comprises: first switch S 1 and the resistance R s of serial connection, the two ends of resistance R s connect two inputs of Current limited Control device respectively, the output of Current limited Control device is controlled the switch of first switch S 1, so that the electric current of corresponding load branch is not higher than the predetermined current value, realizes the current limliting for load branch.Described first switch can realize that when the adjustment plumber did at linear condition, the electric current in the load branch was a direct current by adjusting pipe; When the adjustment pipe was operated on off state or fully conducting state, the electric current in the load branch was pulse chopping electric current (as the PWM electric current) or direct current.
Perhaps, described current-limiting circuit also can realize by current regulator diode.
In above-described the utility model embodiment load driving system, output voltage controller provides the variation of the total current of unit output that the output voltage of each Adjustable Output Voltage unit is carried out self adaptation and regulates according to electric energy, and the flow equalizing circuit of self also can be regulated output voltage in the Adjustable Output Voltage unit, common maximum or mean value flow equalizing circuit all are by current-sharing loop adjustment output voltage, and adjustment process is a dynamic process slowly, and the regulating action of flow equalizing circuit will influence the judgement that the output voltage self adaptation is regulated direction undoubtedly; And also be a kind of method (DROOP method) of using always by above-mentioned current equalizing method, then can not influence concentrated output voltage self adaptation adjustment process but utilize this method to make the output voltage of Adjustable Output Voltage unit increase the equal properties of flow that carries out between a plurality of Adjustable Output Voltage unit that descends, possess new characteristics with output current.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (12)
1. a load drive device is characterized in that, comprising:
Electric energy provides the unit, comprises at least two Adjustable Output Voltage unit, and first output of each described Adjustable Output Voltage unit connects first output that electric energy provides the unit, and second output connects second output that electric energy provides the unit;
The input that carries out the sampling unit of current sample provides arbitrary end of unit to be connected with electric energy, output with carry out electric energy and provide the input of the output voltage controller of unit output voltage control to be connected;
Output voltage controller, its output that carries out voltage control signal output connects electric energy respectively provides each Adjustable Output Voltage unit in the unit, be not more than the preset difference value threshold value with the difference between the maximum load voltage in the load branch of the output voltage of controlling each Adjustable Output Voltage unit and back level, described difference threshold is more than or equal to zero.
2. device according to claim 1 is characterized in that, each Adjustable Output Voltage unit comprises:
Carry out the switch change-over main circuit of voltage transformation;
Voltage loop according to the voltage control signal control switch conversion main circuit output voltage of sampled voltage and output voltage controller, its input that carries out the output voltage sampling is connected with two outputs of switch change-over main circuit, and output connects the switch change-over main circuit.
3. device according to claim 2 is characterized in that, described Adjustable Output Voltage unit further comprises:
The change direction of control switch conversion main circuit output voltage and the current-sharing unit that changes in the opposite direction of sample rate current, its input that carries out current sample is connected with arbitrary output of switch change-over main circuit, and output connects the input of Voltage loop.
4. according to claim 2 or 3 described devices, it is characterized in that described Voltage loop comprises:
First resistance and second resistance string are connected between two outputs of corresponding switch change-over main circuit;
First resistance is connected the inverting input of first operational amplifier with the tie point of second resistance, this inverting input also connects the output of output voltage controller, and, also connect the output of first operational amplifier by compensating network;
The normal phase input end of first operational amplifier connects default output voltage values;
The output of first operational amplifier is as the output of Voltage loop, the output voltage of control switch conversion main circuit.
5. device according to claim 4 is characterized in that, the current-sharing unit comprises:
The output that is serially connected with the switch change-over main circuit and electric energy provide the 3rd resistance between the corresponding output of unit; The 3rd resistance and the end that electric energy provides the unit output to be connected connect the inverting input of first operational amplifier by the 4th resistance.
6. device according to claim 4 is characterized in that, the current-sharing unit comprises:
The output that is serially connected with the switch change-over main circuit and electric energy provide the 3rd resistance between the corresponding output of unit; The 3rd resistance and the end that electric energy provides the unit output to be connected connect the normal phase input end of second operational amplifier by the 4th resistance; The inverting input of second operational amplifier also connects the output of second operational amplifier by the 5th grounding through resistance by the 6th resistance;
The output of second operational amplifier connects the inverting input of first operational amplifier.
7. according to each described device of claim 1 to 3, it is characterized in that, connect by dimmer switch between the output that electric energy provides the unit and the corresponding input of load unit.
8. according to each described device of claim 1 to 3, it is characterized in that described electric energy provides unit, sampling unit and output voltage controller assembled package, load unit individual packages.
9. according to each described device of claim 1 to 3, it is characterized in that the output of Adjustable Output Voltage unit and electric energy provide to be in series with between the corresponding output of unit and carry out the fault that fault cuts off and cut off circuit.
10. a load driving system is characterized in that, comprising:
Load unit, described load unit comprise at least one road load branch, and first end of described load branch connects first end of load unit, and second end of load branch connects second end of load unit;
Electric energy provides the unit, comprises at least two Adjustable Output Voltage unit, and first output of each described Adjustable Output Voltage unit connects first output that electric energy provides the unit, and second output connects second output that electric energy provides the unit; Electric energy provides first output of unit to connect first end of load unit, and second output connects second end of load unit;
The input that carries out the sampling unit of current sample provides arbitrary end of unit to be connected with electric energy, output with carry out electric energy and provide the input of the output voltage controller of unit output voltage control to be connected;
Output voltage controller, its output that carries out voltage control signal output connects electric energy respectively provides each Adjustable Output Voltage unit in the unit, be not more than the preset difference value threshold value with the difference between the maximum load voltage in the load branch of the output voltage of controlling each Adjustable Output Voltage unit and back level, described difference threshold is more than or equal to zero.
11. system according to claim 10 is characterized in that, described load branch comprises: the collections of loads of serial connection and the current-limiting circuit of this load branch.
12. system according to claim 11 is characterized in that, current-limiting circuit comprises:
First switch and the resistance of serial connection, the two ends of resistance connect two inputs of Current limited Control device respectively, and the output of Current limited Control device is controlled the switch of first switch, so that the electric current of corresponding load branch is not higher than the predetermined current value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206824125U CN201919217U (en) | 2010-12-27 | 2010-12-27 | Load driving device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206824125U CN201919217U (en) | 2010-12-27 | 2010-12-27 | Load driving device and system |
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| CN201919217U true CN201919217U (en) | 2011-08-03 |
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| CN2010206824125U Expired - Fee Related CN201919217U (en) | 2010-12-27 | 2010-12-27 | Load driving device and system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102548100A (en) * | 2010-12-27 | 2012-07-04 | 英飞特电子（杭州）有限公司 | Load driving device and system |
| WO2013155904A1 (en) * | 2012-04-18 | 2013-10-24 | 深圳市顶点先进科技有限公司 | Power supply |
| EP2824996A4 (en) * | 2012-01-10 | 2016-03-09 | Sichuan Sunfor Light Co Ltd | White led light emitting device driven directly by constant alternating current |
| CN107065587A (en) * | 2017-05-27 | 2017-08-18 | 环球智达科技（北京）有限公司 | Control device |
| CN107085935A (en) * | 2017-05-27 | 2017-08-22 | 环球智达科技（北京）有限公司 | closing control method |
| CN107123256A (en) * | 2017-05-27 | 2017-09-01 | 环球智达科技（北京）有限公司 | Detect judgment means |
| CN107123255A (en) * | 2017-05-27 | 2017-09-01 | 环球智达科技（北京）有限公司 | Method for controlling opening and closing |
| CN107170226A (en) * | 2017-05-27 | 2017-09-15 | 环球智达科技（北京）有限公司 | The detection determination methods of closing control |
| CN107230341A (en) * | 2017-05-27 | 2017-10-03 | 环球智达科技（北京）有限公司 | Open the detection determination methods of control |
| CN113014083A (en) * | 2021-04-07 | 2021-06-22 | 南京博兰得电子科技有限公司 | Adapter and port voltage adjusting method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102548100A (en) * | 2010-12-27 | 2012-07-04 | 英飞特电子（杭州）有限公司 | Load driving device and system |
| WO2012088904A1 (en) * | 2010-12-27 | 2012-07-05 | 英飞特电子（杭州）有限公司 | Device and system for load driving |
| CN102548100B (en) * | 2010-12-27 | 2014-01-15 | 英飞特电子（杭州）股份有限公司 | Load driving device and system |
| US9215767B2 (en) | 2010-12-27 | 2015-12-15 | Inventronics (Hangzhou), Inc. | Device and system for load driving |
| EP2824996A4 (en) * | 2012-01-10 | 2016-03-09 | Sichuan Sunfor Light Co Ltd | White led light emitting device driven directly by constant alternating current |
| WO2013155904A1 (en) * | 2012-04-18 | 2013-10-24 | 深圳市顶点先进科技有限公司 | Power supply |
| CN107065587A (en) * | 2017-05-27 | 2017-08-18 | 环球智达科技（北京）有限公司 | Control device |
| CN107085935A (en) * | 2017-05-27 | 2017-08-22 | 环球智达科技（北京）有限公司 | closing control method |
| CN107123256A (en) * | 2017-05-27 | 2017-09-01 | 环球智达科技（北京）有限公司 | Detect judgment means |
| CN107123255A (en) * | 2017-05-27 | 2017-09-01 | 环球智达科技（北京）有限公司 | Method for controlling opening and closing |
| CN107170226A (en) * | 2017-05-27 | 2017-09-15 | 环球智达科技（北京）有限公司 | The detection determination methods of closing control |
| CN107230341A (en) * | 2017-05-27 | 2017-10-03 | 环球智达科技（北京）有限公司 | Open the detection determination methods of control |
| CN113014083A (en) * | 2021-04-07 | 2021-06-22 | 南京博兰得电子科技有限公司 | Adapter and port voltage adjusting method thereof |
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