CN102214998B - Isolated sampling device for numerical-control LLC (logical link control) series resonance transformation circuit - Google Patents
Isolated sampling device for numerical-control LLC (logical link control) series resonance transformation circuit Download PDFInfo
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Abstract
The invention relates to an isolated sampling device for a numerical-control LLC (logical link control) series resonance transformation circuit, and the device provided by the invention comprises the numerical-control LLC series resonance transformation circuit, an isolated sampling circuit and a DSP (digital signal processor), wherein the signal input end of the isolated sampling circuit is connected with the secondary side output end of a main transformer of the numerical-control LLC series resonance transformation circuit so as to receive voltage signals; the control input end of the isolated sampling circuit is connected with the general input/output port of the DSP so as to receive control signals; the isolated sampling circuit carries out isolated sampling on the voltage signals based on the control signals so as to generate isolated sampling signals; and the DSP is arranged at the primary side of the main transformer of the numerical-control LLC series resonance transformation circuit and the signal input end of the DSP is connected with the signal output end of the isolated sampling circuit so as to receive the isolated sampling signals. The isolated sampling device can be used for carrying out numerical-control isolated sampling on the secondary side of the main transformer of the numerical-control LLC series resonance transformation circuit.
Description
Technical field
The present invention relates to fields of numeric control technique, more particularly, relate to a kind of numerical control LLC series resonance translation circuit isolation sampling apparatus.
Background technology
Along with the development of switch power technology, high-power, high efficiency, high frequencyization have become the development trend of Switching Power Supply.High frequencyization can effectively reduce Switching Power Supply volume, yet the too high meeting of frequency brings the problem of switching tube loss increase, is unfavorable for improving the efficiency of power supply.LLC series resonance translation circuit, as a kind of special circuit topology, can meet the requirement of high frequency, can reach higher conversion efficiency again, under the promotion of high efficiency development trend, by industry-wide adoption.
Along with the development of digital signal processing chip, digital control technology also applies in power supply industry gradually.Adopt digital controlly, not only can simplify the design of hardware circuit, improve system reliability, antijamming capability, and easily adopt advanced control method, thereby control flexibly.Meanwhile, the development of very lagre scale integrated circuit (VLSIC), can provide the more digital signal processing chip of high-performance and speed, and also the Digital Control for Switching Power Supply provides condition.
In numerical control LLC series resonance translation circuit, due to main transformer original edge voltage, Vin is higher, and secondary output voltage V o is lower, and safe and reliable for circuit needs to carry out electrical isolation between former limit and secondary.When digital signal processor (DSP) is arranged on transformer primary side, need to solve the isolating problem to secondary voltage sampling.In prior art, the sampling of the secondary voltage of common numerical control LLC series resonance translation circuit usually adopts high-speed linear optocoupler to realize, as shown in Figure 1.
Yet high-speed linear optocoupler not only holds at high price, and the stability of its current transfer ratio (the namely electric current of the output photoelectric pipe of optocoupler and the ratio of inputting the electric current of LED) is not high.Therefore, thus this current transfer ratio usually easily change have influence on isolation sample circuit stability.Therefore, need a kind of cost lower, the numerical control LLC series resonance translation circuit isolation sampling apparatus that reliability is high.
Summary of the invention
The technical problem to be solved in the present invention is, high-speed linear optocoupler high cost and the unsettled defect of current transfer ratio of for the secondary voltage for numerical control LLC series resonance translation circuit of prior art, sampling, provide a kind of cost lower, the numerical control LLC series resonance translation circuit isolation sampling apparatus that reliability is high.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of numerical control LLC series resonance translation circuit isolation sampling apparatus, comprise numerical control LLC series resonance translation circuit, isolation sample circuit and digital signal processor, wherein
The signal input part of described isolation sample circuit connects the secondary output of main transformer of described numerical control LLC series resonance translation circuit with receiver voltage signal, and the control input end of described isolation sample circuit connects the universal input and output port of described digital signal processor with reception control signal;
Described isolation sample circuit is isolated sampling to generate isolation sampled signal based on described control signal to described voltage signal;
Described digital signal processor is arranged on the former limit of the main transformer of described numerical control LLC series resonance translation circuit, and the signal output part that the signal input part of described digital signal processor connects described isolation sample circuit is to receive described isolation sampled signal.
In numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, described isolation sample circuit comprises switch module and transformer;
The signal input part that the first input end of the former limit winding of described transformer connects described isolation sample circuit is with receiver voltage signal, the second input of the former limit winding of described transformer connects the first end of described switch module, the second end ground connection of described switch module, the control signal input of described switch module connects the control input end of described isolation sample circuit to receive described control signal; Under the control of described switch module in described control signal during conducting, the secondary of described transformer output isolation sampled signal.
In numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, described switch module comprises switching tube and drive circuit; The input of described drive circuit connects the control signal input of described switch module to receive described control signal and to export isolation drive signal based on described control signal; The output that the grid of described switching tube connects described drive circuit is to receive described isolation drive signal and based on described isolation drive signal conduction or shutoff, the source ground of described switching tube, drain electrode connect the second input of the former limit winding of described transformer.
In numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, described switching tube is mos field effect transistor or insulated gate bipolar transistor; Described drive circuit is isolated drive circuit.
In numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, described digital signal processor comprises for described isolation sampled signal being converted to the analog-to-digital conversion module of digital signal, for generate the control signal generation module of described control signal and for regulating described control signal and described analog-to-digital conversion module so that described analog-to-digital conversion module Obtaining Accurate described in isolate the adjustment module of sampled signal.
In numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, further comprise for the treatment of described isolation sampled signal to generate the secondary signal processing module of effective isolation sampled signal; The first input end of described secondary signal processing module connects secondary first output of described transformer, the second input of described secondary signal processing module connects secondary second output of described transformer to receive described isolation sampled signal, and the sampled signal output of described secondary signal processing module connects the signal input part of described digital signal processor to export effective isolation sampled signal.
In numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, further comprise the first magnetic reset circuit between the first input end of the former limit winding that is arranged on described transformer and the second input of the former limit winding of described transformer.
In numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, further comprise the second magnetic reset circuit being arranged between the first end of described switch module and the second end of described switch module.
In numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, described secondary signal processing module comprises that secondary the second output that is connected to described transformer is to receive and to process the transformation of scale unit of described isolation sampled signal, be connected to secondary second output of described transformer for receiving and process described isolation sampled signal proportional integral converter unit, be connected to secondary second output of described transformer for receiving and process described isolation sampled signal proportion integration differentiation converter unit, secondary the second output that is connected to described transformer for receive and filtering described in secondary second output of isolating the filter unit of sampled signal or being connected to described transformer for isolating the clamp units of the voltage of sampled signal described in clamper.
In numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, described LLC series resonance translation circuit is full-bridge or half-bridge numerical control LLC series resonance translation circuit.
Implement numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, when digital signal processor is arranged on the former limit of main transformer, can isolate sample circuit by use thereby the output voltage signal of secondary is isolated to sampling generation isolation sampled signal, and receive this isolation sampled signal by digital signal processor, make it possible to apply in sample circuit digital control, the isolation of the main transformer secondary by the digital control LLC of realization series resonance translation circuit is sampled.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the circuit theory diagrams of the employing light-coupled isolation sampling numerical control LLC series resonance translation circuit of prior art;
Fig. 2 is the theory diagram of the first embodiment of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention;
Fig. 3 is the theory diagram of the second embodiment of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention;
Fig. 4 is the theory diagram of the 3rd embodiment of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention;
Fig. 5 is the theory diagram of the 4th embodiment of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention;
Fig. 6 is the theory diagram of the 5th embodiment of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention;
Fig. 7 is the theory diagram of the 6th embodiment of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention;
Fig. 8 is the control signal Vpulse of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention and the signal waveforms of isolation sampled signal Vsample.
Embodiment
Fig. 2 is the theory diagram of the first embodiment of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention.As shown in Figure 2, numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention comprises numerical control LLC series resonance translation circuit 30, isolation sample circuit 10 and digital signal processor 20.Wherein, the signal input part of described isolation sample circuit 10 is connected to the secondary output of main transformer of described LLC series resonance translation circuit 30 with receiver voltage signal Vdc, and the control input end of described isolation sample circuit 10 is connected to the universal input and output port GPIO of described digital signal processor 20 with reception control signal Vpulse.Described isolation sample circuit 10 is isolated sampling to generate isolation sampled signal Vsample based on described control signal Vpulse to described voltage signal Vdc.Described digital signal processor 20 is arranged on the former limit of the main transformer of described LLC series resonance translation circuit 30, and the signal output part that the signal input part ADC of described digital signal processor 20 is connected to described isolation sample circuit 10 is to receive described isolation sampled signal Vsample.
The operation principle of the numerical control LLC series resonance translation circuit isolation sampling apparatus shown in Fig. 2 is as follows: the universal input and output port GPIO of digital signal processor 20 sends control signal Vpulse, described isolation sample circuit 10 is isolated sampling based on described control signal Vpulse to described voltage signal Vdc, obtain suitable isolation sampled signal Vsample, send back to again digital signal processor 20, thereby realize the sampling of voltage signal Vdc and control, by digital signal processor 20, control isolation sample circuit 10, when needs are sampled, sample.
In a preferred embodiment of the invention, as shown in Figure 8, control signal Vpulse is to be Ts in the cycle to the waveform of control signal Vpulse and isolation sampled signal Vsample, the high-frequency impulse ripple that duty ratio is fixing.It is effective control signal (but high level is effective or Low level effective) during Ton, during this, from the voltage signal Vo of the secondary output output of the main transformer of LLC series resonance translation circuit, being isolated sample circuit 10 receives as voltage signal Vdc, described isolation sample circuit 10 is isolated sampling based on described control signal Vpulse to described voltage signal Vdc, obtain suitable isolation sampled signal Vsample, then send back to digital signal processor 20.Under the control of control signal Vpulse, isolation sampled signal Vsample is just effective in the time at Ton, consider the time delay from control signal Vpulse to isolation sampled signal Vsample circuit transmission, after the time delay Td time, digital signal processor 20 just carries out AD sampling.
In each embodiment of the present invention, the isolation sample circuit that described isolation sample circuit 10 can be any type.Various isolation sample circuit as known in the art may be used to the present invention.The present invention is not isolated the restriction of the type of sample circuit at this.Described digital signal processor 20 can be isolated sample circuit 10 from this and be received the isolation sampled signal Vsample of simulation, and is carried out analog-to-digital conversion, thereby realizes digitized sampling and control.In the following example of the present invention, show preferred isolation sample circuit and digital signal processor.
Implement numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, when digital signal processor is arranged on the former limit of main transformer, can isolate sample circuit by use thereby the output voltage signal of secondary is isolated to sampling generation isolation sampled signal, and receive this isolation sampled signal by digital signal processor, make it possible to apply in sample circuit digital control, the isolation of the main transformer secondary by the digital control LLC of realization series resonance translation circuit is sampled.
Fig. 3 is the theory diagram of the second embodiment of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention.The preferred isolation sample circuit 10 of numerical control LLC series resonance translation circuit isolation sampling apparatus has been shown in Fig. 3.In the present embodiment, isolation sample circuit 10 comprises switch module 100 and transformer T1.The first input end of the former limit winding of wherein said transformer T1 is connected to the signal input part of described isolation sample circuit 10 with the secondary output of the main transformer from LLC series resonance translation circuit (this is not shown, can referring to Fig. 4) receiver voltage signal Vdc.The second input of the former limit winding of described transformer T1 is connected to the first end of described switch module 100.The second end ground connection of described switch module 100.The control signal input of described switch module 100 is connected to the control input end of described isolation sample circuit 10 to receive described control signal Vpulse; Under the control of described switch module 100 at described control signal Vpulse during conducting, the secondary of described transformer T1 output isolation sampled signal Vsample.
Its operation principle is as follows, and the universal input and output port GPIO of digital signal processor 20 sends control signal Vpulse.The control signal input of described switch module 100 receives described control signal Vpulse, and based on described control signal Vpulse conducting or shutoff.Under the control of described switch module 100 at described control signal Vpulse during conducting, the secondary of described transformer T1 output isolation sampled signal Vsample.This isolation sampled signal Vsample returns to described digital signal processor 20 through the signal input part ADC of described digital signal processor 20.
In the embodiment show in figure 3, described switch module 100 can be the device for power switching that driven by drive circuit, also can be to control manually or automatically intelligent switch module closed and that turn-off by user, can be even also common manual or automatic switch device.In a preferred embodiment of the invention, described switching tube Q1 can be mos field effect transistor (MOSFET), also can be insulated gate bipolar transistor (IGBT), can also be other device for power switching, its drive circuit can be isolated drive circuit or non-isolated drive circuit.
Fig. 4 is the theory diagram of the 3rd embodiment of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention.LLC series resonance translation circuit is as shown in Figure 4 asymmetric half-bridge LLC series resonance translation circuit.In other embodiments of the invention, this LLC series resonance translation circuit can also be symmetrical full-bridge LLC series resonance translation circuit.In this embodiment, described isolation sample circuit 10 comprises transformer T1, mos field effect transistor Q1, drive circuit 101.As shown in Figure 4, the output that the first input end of the former limit winding of described transformer T1 is connected to the main transformer T2 of asymmetric half-bridge LLC series resonance translation circuit is usingd and is received output voltage V o as voltage signal Vdc, and the second input of the former limit winding of described transformer T1 connects the drain electrode of described mos field effect transistor Q1.The source ground of described mos field effect transistor Q1.The input of described drive circuit 101 is from described digital signal processor 20 reception control signal Vpulse and based on described control signal Vpulse output isolation drive signal.The grid of described mos field effect transistor Q1 is to receive described isolation drive signal and based on described isolation drive signal conduction or shutoff.
In the present embodiment, this numerical control LLC series resonance translation circuit isolation sampling apparatus further comprises secondary signal processing module 200.The first input end of described secondary signal processing module 200 is connected to secondary the second output that the second input of secondary the first output of described transformer T1, described secondary signal processing module 200 is connected to described transformer T1 to receive described isolation sampled signal Vsample.Described secondary signal processing module 200 carries out necessary processing according to actual conditions to Vsample, and the signal input part ADC that the sampled signal output of described secondary signal processing module 200 is connected to described digital signal processor 20 is subsequently to export effective isolation sampled signal V ' sample.
Fig. 5 is the theory diagram of the 4th embodiment of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention.Fig. 5 and Fig. 4 are substantially similar, and its difference is, at digital signal processor described in Fig. 5 20, comprises: ADC module 21 (being analog-to-digital conversion module), control signal generation module 22 and adjustment module 23.The effective isolation sampled signal V ' sample of wherein said analog-to-digital conversion module 21 from secondary signal processing module 200 reception & disposals, and convert thereof into digital signal.Described control signal generation module 22 is for generating described control signal Vpulse to occur to drive circuit 101.Described adjustment module 23 simultaneously for regulate described control signal generation module 22 to generate described control signal Vpulse and regulate described analog-to-digital conversion module 21 so that described analog-to-digital conversion module 21 Obtaining Accurates described in effective isolation sampled signal V ' sample.
Those skilled in the art know, digital signal processor described in the present embodiment 20 also can be for the embodiment in Fig. 2-Fig. 3, and the embodiment of mentioned Fig. 6-8 below.According to instruction of the present invention, how those skilled in the art know the digital signal processor of using in Fig. 5 20 for above-described embodiment, after be just not repeated.
Fig. 6 is the theory diagram of the 5th embodiment of numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention.In the preferred embodiment of Fig. 6, the output that the first input end of the former limit winding of described transformer T1 is connected to the main transformer of asymmetric half-bridge LLC series resonance translation circuit is usingd and is received output voltage V o as voltage signal Vdc (this is not shown), and the second input of the former limit winding of described transformer T1 connects the drain electrode of described mos field effect transistor Q1.The source ground of described mos field effect transistor Q1.The input of described drive circuit 101 is from described digital signal processor 20 reception control signal Vpulse and based on described control signal Vpulse output isolation drive signal.The grid of described mos field effect transistor Q1 is to receive described isolation drive signal and based on described isolation drive signal conduction or shutoff.The first magnetic reset circuit 300 is arranged between the first input end of former limit winding of described transformer T1 and the second input of the former limit winding of described transformer T1.In other preferred embodiments of the present invention, also can comprise the second magnetic reset circuit 400.The second magnetic reset circuit 400 can be arranged between the source electrode and drain electrode of mos field effect transistor Q, and then guarantee that transformer T1 can safe and reliable work (referring to Fig. 7).In the present invention, can use any magnetic reset circuit well known in the prior art, those skilled in the art know and can obtain various magnetic reset circuit, at this, just no longer tire out and state.Those skilled in the art know, the first magnetic reset circuit 300 or the second magnetic reset circuit 400 can be only set respectively.The first magnetic reset circuit 300 and the second magnetic reset circuit 400 also can be set simultaneously.
In the embodiment show in figure 6, described secondary signal processing module 200 can comprise transformation of scale unit 201, filter unit 204 and clamp units 205.In this embodiment, described clamp units 205 is connected to the secondary of described transformer T1, for isolating sampled signal Vsample described in clamp.Then, by isolating sampled signal Vsample described in 204 pairs of clamps of filter unit, carry out filtering, generate clamp filtering isolation sampled signal Vsample ".Described transformation of scale unit 201 receives described clamp filtering isolation sampled signal Vsample " and it is carried out to ratio variation, to export the effective isolation sampled signal Vsample ' after processing.In other embodiments of the invention, can adoption rate integral transformation unit 202 (as shown in Figure 7) or proportion integration differentiation converter unit (not shown) carry out substitution ratio converter unit 201.
At this, those skilled in the art are known and can obtain aforementioned proportion converter unit 201, proportional integral converter unit 202, proportion integration differentiation converter unit, filter unit 204 and clamp units 205.Any above-mentioned functions module as known in the art may be used to the present invention, at this, just no longer its structure is tired out and has been stated.In addition, those skilled in the art can according to actual needs, select any known signal processing unit to carry out required processing so that it adapts to the needs of analog-to-digital conversion module 201 better to isolation sampled signal Vsample.
In simplified embodiment of the present invention, can make the isolation sampled signal Vsample of secondary output of transformer T1 without carrying out next step processing by adjusting the former limit winding of transformer T1 and the turn ratio of secondary winding, just can and control use for the detection of digital signal processor 20.
In other preferred embodiments of the present invention, described secondary signal processing module 200 comprises one and the described filter unit 204 in described transformation of scale unit 201, proportional integral converter unit 202, proportion integration differentiation converter unit.Such as, when described secondary signal processing module 200 comprises filter unit 204 and transformation of scale unit 201, described filter unit 204 is connected to the secondary of described transformer T1, for described in filtering, isolate sampled signal, the isolation sampled signal of described transformation of scale unit 201 from described filter unit 204 accepts filter, and filtered isolation sampled signal is carried out to transformation of scale.
In other preferred embodiments of the present invention, described secondary signal processing module 200 comprises one and the described clamp units 205 in described transformation of scale unit 201, proportional integral converter unit 202, proportion integration differentiation converter unit.Such as, when described secondary signal processing module 200 comprises clamp units 205 and transformation of scale unit 201, described clamp units 205 is connected to the secondary of described transformer T1, for described in clamp, isolate sampled signal, the isolation sampled signal that described transformation of scale unit 201 receives clamp from described clamp units 205, and the isolation sampled signal after described clamp is carried out to transformation of scale.
In another kind of preferred embodiment of the present invention, described secondary signal processing module 200 can only include described clamp units 205 and filter unit 204, wherein said clamp units 205 is connected to the secondary of described transformer T1 and isolates sampled signal with described in clamper, described filter unit 204 is connected to described clamp units 205 to receive the isolation sampled signal after clamper, and the isolation sampled signal after described clamper is carried out to filtering.
In preferred embodiment of the present invention, described secondary signal processing module 200 further comprises one, described filter unit 204 and the described clamp units 205 in described transformation of scale unit 201, proportional integral converter unit 202, proportion integration differentiation converter unit.
Implement numerical control LLC series resonance translation circuit isolation sampling apparatus of the present invention, when digital signal processor is arranged on the former limit of main transformer, can isolate sample circuit by use thereby the output voltage signal of secondary is isolated to sampling generation isolation sampled signal, and receive this isolation sampled signal by digital signal processor, make it possible to apply in sample circuit digital control, the isolation of the main transformer secondary by the digital control LLC of realization series resonance translation circuit is sampled.In addition, also use magnetic reset circuit, guaranteed the work that transformer can be safe and reliable, and then guaranteed the stable and reliable of whole numerical control isolation sampling device.
Although the present invention describes by specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, can also carry out various conversion and be equal to alternative the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole execution modes that fall within the scope of the claims in the present invention.
Claims (9)
1. a numerical control LLC series resonance translation circuit isolation sampling apparatus, is characterized in that, comprises numerical control LLC series resonance translation circuit (30), isolation sample circuit (10) and digital signal processor (20),
The signal input part of described isolation sample circuit (10) connects the secondary output of main transformer of described numerical control LLC series resonance translation circuit (30) with receiver voltage signal (Vdc), and the control input end of described isolation sample circuit (10) connects the universal input and output port (GPIO) of described digital signal processor (20) with reception control signal (Vpulse);
Described isolation sample circuit (10) is isolated sampling to generate isolation sampled signal (Vsample) based on described control signal (Vpulse) to described voltage signal (Vdc);
Described digital signal processor (20) is arranged on the former limit of the main transformer of described numerical control LLC series resonance translation circuit (30), and the signal output part that the signal input part (ADC) of described digital signal processor (20) connects described isolation sample circuit (10) is to receive described isolation sampled signal (Vsample); Described isolation sample circuit (10) only comprises switch module (100) and transformer (T1);
The first input end of the former limit winding of described transformer (T1) connects the signal input part of described isolation sample circuit (10) with receiver voltage signal (Vdc), the second input of the former limit winding of described transformer (T1) connects the first end of described switch module (100), the second end ground connection of described switch module (100), the control signal input of described switch module (100) connects the control input end of described isolation sample circuit (10) to receive described control signal (Vpulse); When described switch module (100) is under the control of described control signal (Vpulse) during conducting, the secondary of described transformer (T1) output isolation sampled signal (Vsample);
Wherein said switch module (100) is the device for power switching that driven by drive circuit.
2. numerical control LLC series resonance translation circuit according to claim 1 is isolated sampling apparatus, it is characterized in that, described switch module (100) comprises switching tube (Q1) and drive circuit (101), and the input of described drive circuit (101) connects the control signal input of described switch module (100) to receive described control signal (Vpulse) and to export isolation drive signal based on described control signal (Vpulse); The output that the grid of described switching tube (Q1) connects described drive circuit (101) is to receive described isolation drive signal and based on described isolation drive signal conduction or shutoff, the source ground of described switching tube (Q1), drain electrode connect the second input of the former limit winding of described transformer (T1).
3. numerical control LLC series resonance translation circuit isolation sampling apparatus according to claim 2, is characterized in that, described switching tube (Q1) is mos field effect transistor or insulated gate bipolar transistor; Described drive circuit (101) is isolated drive circuit.
4. numerical control LLC series resonance translation circuit according to claim 1 is isolated sampling apparatus, it is characterized in that, described digital signal processor (20) comprises for described isolation sampled signal (Vsample) being converted to the analog-to-digital conversion module (21) of digital signal, be used for generating the control signal generation module (22) of described control signal (Vpulse) and for regulating described control signal (Vpulse) and described analog-to-digital conversion module (21) so that described analog-to-digital conversion module (21) Obtaining Accurate described in isolate sampled signal (Vsample) adjustment module (23).
5. numerical control LLC series resonance translation circuit according to claim 1 is isolated sampling apparatus, it is characterized in that, further comprise for the treatment of described isolation sampled signal (Vsample) to generate the secondary signal processing module (200) of effective isolation sampled signal (V ' sample); The first input end of described secondary signal processing module (200) connects secondary first output of described transformer (T1), the second input of described secondary signal processing module (200) connects secondary second output of described transformer (T1) to receive described isolation sampled signal (Vsample), and the signal input part (ADC) that the sampled signal output of described secondary signal processing module (200) connects described digital signal processor (20) is to export effective isolation sampled signal (V ' sample).
6. numerical control LLC series resonance translation circuit according to claim 2 is isolated sampling apparatus, it is characterized in that, further comprise the first magnetic reset circuit (300) between the first input end of the former limit winding that is arranged on described transformer (T1) and the second input of the former limit winding of described transformer (T1).
7. numerical control LLC series resonance translation circuit according to claim 2 is isolated sampling apparatus, it is characterized in that, further comprise the second magnetic reset circuit (400) being arranged between the first end of described switch module (100) and the second end of described switch module (100).
8. numerical control LLC series resonance translation circuit according to claim 5 is isolated sampling apparatus, it is characterized in that, described secondary signal processing module (200) comprises that secondary the second output that is connected to described transformer (T1) is to receive and to process the transformation of scale unit (201) of described isolation sampled signal (Vsample), be connected to secondary second output of described transformer (T1) for receiving and process described isolation sampled signal (Vsample) proportional integral converter unit (202), be connected to secondary second output of described transformer (T1) for receiving and process described isolation sampled signal (Vsample) proportion integration differentiation converter unit, secondary the second output that is connected to described transformer (T1) for receive and filtering described in secondary second output of isolating the filter unit (204) of sampled signal (Vsample) or being connected to described transformer (T1) for isolating the clamp units (205) of the voltage of sampled signal (Vsample) described in clamper.
9. according to the numerical control LLC series resonance translation circuit isolation sampling apparatus described in arbitrary claim in claim 1-8, it is characterized in that, described numerical control LLC series resonance translation circuit is full-bridge or half-bridge LLC series resonance translation circuit.
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