CN204481710U - A kind of high efficiency wireless electromagnetic induction rectification circuit - Google Patents
A kind of high efficiency wireless electromagnetic induction rectification circuit Download PDFInfo
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- CN204481710U CN204481710U CN201520186870.2U CN201520186870U CN204481710U CN 204481710 U CN204481710 U CN 204481710U CN 201520186870 U CN201520186870 U CN 201520186870U CN 204481710 U CN204481710 U CN 204481710U
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Abstract
The utility model discloses a kind of high efficiency wireless electromagnetic induction rectification circuit, and it comprises rectification unit and switch element, and the output of rectification unit is connected with the input of switch element, and the output of switch element is connected with load; Wherein, described rectification unit adopts PMOS and NMOS tube grid cross connecting structure to realize, and utilizes the Automatic level control PMOS at coupling coil two ends and the conducting of NMOS tube or closedown, forms bridge rectifier; Switch element is located between rectification unit and load, prevents the Charge back flow in load.The utility model is on the basis of traditional bridge rectifier, diode is substituted with switch P MOS and NMOS, and increase controlled switching devices or one way conducting device in output port, when preventing the input of the output of rectification circuit higher than rectification circuit, there is Charge back flow phenomenon, thus improve rectification efficiency and output voltage.The utility model have structure simple, be easy to plurality of advantages such as realizing, with low cost, there is very strong economy and practicality.
Description
Technical field
The utility model relates to wireless energy transfer processing technology field, particularly a kind of rectification circuit being suitable for that radio frequency identification integrated circuit or wireless charging circuit module use.
Background technology
For wireless energy transfer system, the index of one of them key is energy transmission efficiency.For the energy transmission system of electromagnetic induction type, the factor affecting energy transmission efficiency mainly comprises the following aspects: the loss of energy in energy transmitting terminal drive circuit; The energy loss that the factor such as specification, resonance frequency, leakage field of coupling coil causes; Energy acceptance end becomes the electric energy received the energy loss direct current process from alternating current.
The alternating current that rectification circuit is used for coupling coil to obtain becomes direct current, usually utilizes the mode of bridge rectifier to realize.Basic bridge rectifier shown in Figure 1, this bridge rectifier utilizes the unidirectional general character of diode to carry out rectification, adopts 4 diodes (diode D1, D2, D3, D4), docks between two.AC signal positive half timesharing 2 diode current flows of input, obtain positive output; The negative half portion timesharing of input exchange signal, other 2 diode current flows, because these 2 diodes are reversal connection, so still obtain positive output.Due to junction voltage and the forward resistance of diode self, make basic bridge rectifier resistance comparatively large, loss is also larger.
Utility model content
Therefore, for above-mentioned problem, the utility model improves traditional bridge rectifier, proposes one and is applicable to low-loss in wireless electromagnetic induction energy transmission system, high efficiency rectification circuit.
For achieving the above object, the utility model is by the following technical solutions:
A kind of high efficiency wireless electromagnetic induction rectification circuit, comprise rectification unit and switch element, the output of rectification unit is connected with the input of switch element, and the output of switch element is connected with load; Wherein, described rectification unit adopts PMOS, and (PMOS is the abbreviation of positive channel Metal Oxide Semiconductor, refer to N-type substrate, P raceway groove, the metal-oxide-semiconductor of electric current is transported in flowing by hole) and NMOS tube (NMOS is the abbreviation of N-Mental-Oxide-Semiconductor, N-type metal-oxide-semiconductor) realization of grid cross connecting structure, utilize the Automatic level control PMOS at coupling coil two ends and the conducting of NMOS tube or closedown, form bridge rectifier; Between rectification unit and load, insert switch element, prevent the Charge back flow in load.Described switch element can adopt controlled switching devices or one way conducting device to realize.
As a kind of feasible scheme, a kind of high efficiency wireless electromagnetic induction rectification circuit, comprises the first N-type MOS switching tube MN1, the second N-type MOS switching tube MN2, the 3rd P type MOS switching tube MP1, the 4th P type MOS switching tube MP2 and the first output switch device SW1 and the second output switch device SW2; Its annexation is as follows: the grid of the first N-type MOS switching tube MN1 is connected to the drain terminal of the second N-type MOS switching tube MN2, the grid of the 3rd P type MOS switching tube MP1 and the source of the 4th P type MOS switching tube MP2, as the first end of the energy acceptance of this rectification unit; The drain terminal of the first N-type MOS switching tube MN1 is connected to the grid of the grid of the second N-type MOS switching tube MN2, the source of the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2, as the second end of the energy acceptance of this rectification unit; The source of the first N-type MOS switching tube MN1 and substrate are connected to GND end; The source of the second N-type MOS switching tube MN2 and substrate are connected to GND end; The drain terminal of the 3rd P type MOS switching tube MP1 is connected to one end of the first output switch device SW1 and the second output switch device SW2, and substrate is connected to load as output; The drain terminal of the 4th P type MOS switching tube MP2 is connected to one end (being also the drain terminal of the 3rd P type MOS switching tube MP1) of the first output switch device SW1 and the second output switch device SW2, and substrate is connected to load; First output switch device SW1, between the common drain terminal being arranged at the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2 and load, this first output switch device SW1 is by the voltage control of the second end of the energy acceptance of rectification unit; Second output switch device SW2, between the common drain terminal being arranged at the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2 and load, the second output switch device SW2 is by the voltage control of the first end of the energy acceptance of rectification unit.
As a kind of mode comparatively easily realized, a kind of high efficiency wireless electromagnetic induction rectification circuit, comprises coupling coil T1, the first N-type MOS switching tube MN1, the second N-type MOS switching tube MN2, the 3rd P type MOS switching tube MP1, the 4th P type MOS switching tube MP2, the first output switch device SW1 and the second output switch device SW2; Wherein, coupling coil T1, as the energy acceptance end of this rectification circuit; First N-type MOS switching tube MN1, its grid is connected to the A2 end of coupling coil T1, and drain terminal is connected to the A1 end of coupling coil T1, and source and substrate are connected to GND end; Second N-type MOS switching tube MN2, its grid is connected to the A1 end of coupling coil T1, and drain terminal is connected to the A2 end of coupling coil T1, and source and substrate are connected to GND end; 3rd P type MOS switching tube MP1, its grid is connected to the A2 end of coupling coil T1, and source is connected to the A1 end of coupling coil T1, and drain terminal is connected to the left end of the first output switch device SW1 and the second output switch device SW2, and substrate is connected to the upper end of output loading; 4th P type MOS switching tube MP2, its grid is connected to the A1 end of coupling coil T1, and source is connected to the A2 end of coupling coil T1, and drain terminal is connected to the left end of the first output switch device SW1 and the second output switch device SW2, and substrate is connected to the upper end of output loading; First output switch device SW1, between the common drain terminal being arranged at the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2 and output loading, the voltage control that the first output switch device SW1 holds by the A1 of coupling coil T1; Second output switch device SW2, between the common drain terminal being arranged at the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2 and output loading, the voltage control that the second output switch device SW2 holds by the A2 of coupling coil T1.
Conveniently energy storage, this wireless electromagnetic induction rectification circuit also comprises energy-storage units, and this energy-storage units is connected between switch element and load.This energy-storage units can adopt electric capacity CL to realize, after this electric capacity CL is arranged at the first output switch device SW1 and the second output switch device SW2, as energy storage device.
Controlled switching devices or the one way conducting device such as the first output switch device SW1 and the second output switch device SW2 is increased at the output port of rectification unit, when preventing the input of the output of rectification unit higher than rectification unit, there is Charge back flow phenomenon, thus improve rectification efficiency and output voltage.The utility model adopts such scheme, is on the basis of traditional bridge rectifier, substitutes diode, and set up switch element in output port with switch P MOS and NMOS, thus improves rectification efficiency and output voltage.Compared with common bridge rectifier, the utility model has following beneficial effect:
1, utilize PMOS and NMOS on coupling coil, connect into grid chi structure, eliminate the forward junction voltage drop of diode in common bridge rectifier, improve rectification efficiency;
The opening and closing of the switch element 2, between rectification unit and load, all by the voltage control of coupling coil, when the voltage of coil port is high, switch open, rectification unit powers to the load, when the voltage of coil port is low, now have load voltage to exist higher than the situation of coil voltage, switch cuts out, and has cut off the Charge back flow loading to coil, prevent energy loss, improve rectification efficiency.
Accompanying drawing explanation
Fig. 1 is existing bridge rectifier schematic diagram;
Fig. 2 is the structural representation of the embodiment of wireless electromagnetic induction rectification circuit of the present utility model.
Embodiment
In existing bridge rectifier, due to junction voltage and the forward resistance of diode self, make basic bridge rectifier resistance larger, loss is also larger, for solving this problem, the utility model provides a kind of low-loss, high efficiency rectification circuit, is applicable to wireless electromagnetic induction energy transmission system.
For setting forth summary of the invention of the present utility model, now with embodiment, the utility model is further illustrated by reference to the accompanying drawings.
Refer to shown in Fig. 2, a kind of high efficiency wireless electromagnetic induction rectification circuit, comprises coupled antenna T1, the first N-type MOS switching tube MN1, the second N-type MOS switching tube MN2, the 3rd P type MOS switching tube MP1, the 4th P type MOS switching tube MP2, the first output switch device SW1, the second output switch device SW2 and output load capacitance CL.First N-type MOS switching tube MN1, its grid is connected to the A2 end of coupled antenna T1, and drain terminal is connected to the A1 end of coupled antenna T1, and source and substrate are connected to GND end; Second N-type MOS switching tube MN2, its grid is connected to the A1 end of coupled antenna T1, and drain terminal is connected to the A2 end of coupled antenna T1, and source and substrate are connected to GND end; 3rd P type MOS switching tube MP1, its grid is connected to the A2 end of coupled antenna T1, and source is connected to the A1 end of coupled antenna T1, and drain terminal is connected to the left end of the first output switch device SW1 and the second output switch device SW2, and substrate is connected to the upper end of output load capacitance CL; 4th P type MOS switching tube MP2, its grid is connected to the A1 end of coupled antenna T1, and source is connected to the A2 end of coupled antenna T1, and drain terminal is connected to the left end of the first output switch device SW1 and SW2, and substrate is connected to the upper end of output load capacitance CL; First output switch device SW1, between the common drain terminal being arranged at the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2 and output load capacitance CL, the voltage control that the first output switch device SW1 holds by the A1 of coupled antenna T1; Second output switch device SW2, between the common drain terminal being arranged at the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2 and output load capacitance CL, the voltage control that the second output switch device SW2 holds by the A2 of coupled antenna T1; After output loading is arranged at the first output switch device SW1 and the second output switch device SW2.Output load resistance is RL.
When coupled antenna T1 receives AC signal, suppose that A1 end is high level, when A2 end is for low level, the 3rd P type MOS switching tube MP1, the first output switch device SW1, the second N-type MOS switching tube MN2 open; 4th P type MOS switching tube MP2, the second output switch device SW2, the first N-type MOS switching tube MN1 close; Current circuit is the A2 end holding-MP1 source-MP1 drain terminal-SW1-CL, RL-GND-MN2 source-MN2 drain terminal-coupled antenna T1 from the A1 of coupled antenna T1.
The AC signal received as coupled antenna T1 becomes A1 end for low level, and when A2 end is for high level, the 4th P type MOS switching tube MP2, the second output switch device SW2, the first N-type MOS switching tube MN1 open; 3rd P type MOS switching tube MP1, the first output switch device SW1, the second N-type MOS switching tube MN2 close; Current circuit is the A1 end holding-MP2 source-MP2 drain terminal-SW2-CL, RL-GND-MN1 source-MN1 drain terminal-coupled antenna T1 from the A2 of coupled antenna T1.
In the present embodiment, the first output switch device SW1 and the second output switch device SW2 can be the NMOS tube of low threshold voltage, also can be the Schottky diode that forward junction voltage is less.Optimum rectification efficiency can be optimized by the size optimizing each switching tube and switching device.
The utility model adopts said structure, by adopting PMOS and NMOS tube grid cross connecting structure to realize rectification circuit, utilizing the Automatic level control PMOS at coupling coil two ends and the conducting of NMOS tube or closedown, forming bridge rectifier; Meanwhile, between rectification unit and load, insert switch element, prevent the Charge back flow in load.Such scheme of the present utility model, on the basis of traditional bridge rectifier, diode is substituted with switch P MOS and NMOS, and increase controlled switching devices or one way conducting device in output port, when preventing the input of the output of rectification circuit higher than rectification circuit, there is Charge back flow phenomenon, thus improve rectification efficiency and output voltage.It is simple that the utility model has structure, is easy to realize, and the plurality of advantages such as cost is low, have very strong economy and practicality.
Although specifically show in conjunction with preferred embodiment and describe the utility model; but those skilled in the art should be understood that; not departing from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (8)
1. a high efficiency wireless electromagnetic induction rectification circuit, it is characterized in that: comprise rectification unit and switch element, the output of rectification unit is connected with the input of switch element, and the output of switch element is connected with load; Wherein, described rectification unit adopts PMOS and NMOS tube grid cross connecting structure to realize, and utilizes the Automatic level control PMOS at coupling coil two ends and the conducting of NMOS tube or closedown, forms bridge rectifier; Switch element is located between rectification unit and load, prevents the Charge back flow in load.
2. wireless electromagnetic induction rectification circuit according to claim 1, is characterized in that: described switch element adopts controlled switching devices or one way conducting device to realize.
3. wireless electromagnetic induction rectification circuit according to claim 1, is characterized in that: this wireless electromagnetic induction rectification circuit also comprises energy-storage units, and this energy-storage units is connected between switch element and load.
4. the wireless electromagnetic induction rectification circuit according to claim 1 or 2 or 3, is characterized in that: this wireless electromagnetic induction rectification circuit comprises the first N-type MOS switching tube MN1, the second N-type MOS switching tube MN2, the 3rd P type MOS switching tube MP1, the 4th P type MOS switching tube MP2 and the first output switch device SW1 and the second output switch device SW2;
Its annexation is as follows: the grid of the first N-type MOS switching tube MN1 is connected to the drain terminal of the second N-type MOS switching tube MN2, the grid of the 3rd P type MOS switching tube MP1 and the source of the 4th P type MOS switching tube MP2, as the first end of the energy acceptance of this rectification unit;
The drain terminal of the first N-type MOS switching tube MN1 is connected to the grid of the grid of the second N-type MOS switching tube MN2, the source of the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2, as the second end of the energy acceptance of this rectification unit;
The source of the first N-type MOS switching tube MN1 and substrate are connected to GND end; The source of the second N-type MOS switching tube MN2 and substrate are connected to GND end;
The drain terminal of the 3rd P type MOS switching tube MP1 is connected to one end of the first output switch device SW1 and the second output switch device SW2, and substrate is connected to load as output;
The drain terminal of the 4th P type MOS switching tube MP2 is connected to one end of the first output switch device SW1 and the second output switch device SW2, and substrate is connected to load;
First output switch device SW1, between the common drain terminal being arranged at the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2 and load, the first output switch device SW1 is by the voltage control of the second end of the energy acceptance of this rectification unit;
Second output switch device SW2, between the common drain terminal being arranged at the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2 and load, the second output switch device SW2 is by the voltage control of the first end of the energy acceptance of this rectification unit.
5. wireless electromagnetic induction rectification circuit according to claim 4, is characterized in that: described first output switch device SW1 and the second output switch device SW2 is the Schottky diode that the NMOS tube of low threshold voltage or forward junction voltage are less.
6. wireless electromagnetic induction rectification circuit according to claim 3, is characterized in that: this wireless electromagnetic induction rectification circuit comprises coupling coil T1, the first N-type MOS switching tube MN1, the second N-type MOS switching tube MN2, the 3rd P type MOS switching tube MP1, the 4th P type MOS switching tube MP2, the first output switch device SW1 and the second output switch device SW2;
Wherein, coupling coil T1, as the energy acceptance end of this rectification circuit;
First N-type MOS switching tube MN1, its grid is connected to the A2 end of coupling coil T1, and drain terminal is connected to the A1 end of coupling coil T1, and source and substrate are connected to GND end;
Second N-type MOS switching tube MN2, its grid is connected to the A1 end of coupling coil T1, and drain terminal is connected to the A2 end of coupling coil T1, and source and substrate are connected to GND end;
3rd P type MOS switching tube MP1, its grid is connected to the A2 end of coupling coil T1, and source is connected to the A1 end of coupling coil T1, and drain terminal is connected to the left end of the first output switch device SW1 and the second output switch device SW2, and substrate is connected to the upper end of output loading;
4th P type MOS switching tube MP2, its grid is connected to the A1 end of coupling coil T1, and source is connected to the A2 end of coupling coil T1, and drain terminal is connected to the left end of the first output switch device SW1 and the second output switch device SW2, and substrate is connected to the upper end of output loading;
First output switch device SW1, between the common drain terminal being arranged at the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2 and output loading, the voltage control that the first output switch device SW1 holds by the A1 of coupling coil T1;
Second output switch device SW2, between the common drain terminal being arranged at the 3rd P type MOS switching tube MP1 and the 4th P type MOS switching tube MP2 and output loading, the voltage control that the second output switch device SW2 holds by the A2 of coupling coil T1.
7. wireless electromagnetic induction rectification circuit according to claim 6, is characterized in that: this energy-storage units adopts electric capacity CL to realize, after this electric capacity CL is arranged at the first output switch device SW1 and the second output switch device SW2, as energy storage device.
8. wireless electromagnetic induction rectification circuit according to claim 6, is characterized in that: described first output switch device SW1 and the second output switch device SW2 is the Schottky diode that the NMOS tube of low threshold voltage or forward junction voltage are less.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520186870.2U CN204481710U (en) | 2015-03-31 | 2015-03-31 | A kind of high efficiency wireless electromagnetic induction rectification circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520186870.2U CN204481710U (en) | 2015-03-31 | 2015-03-31 | A kind of high efficiency wireless electromagnetic induction rectification circuit |
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| CN204481710U true CN204481710U (en) | 2015-07-15 |
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| CN201520186870.2U Active CN204481710U (en) | 2015-03-31 | 2015-03-31 | A kind of high efficiency wireless electromagnetic induction rectification circuit |
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