CN100514789C - Rectifier with quick disjunction inductive load - Google Patents
Rectifier with quick disjunction inductive load Download PDFInfo
- Publication number
- CN100514789C CN100514789C CNB2007100572513A CN200710057251A CN100514789C CN 100514789 C CN100514789 C CN 100514789C CN B2007100572513 A CNB2007100572513 A CN B2007100572513A CN 200710057251 A CN200710057251 A CN 200710057251A CN 100514789 C CN100514789 C CN 100514789C
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- resistance
- rectifier
- effect transistor
- field effect
- piezo
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Abstract
A kind of rectifier which can cut load quicly, the anode of input power S+ is concatenated via two piezoresistances R5, R6, and then parallel with diode D2 to anode output V+ of rectifier; the canoed S- of input power is concatenated via two piezoresistances R3, R4, and then parallel with diode D1 to anode output V+ of rectifier; the canoed S- is also concatenated via two resistances R9, R10, and then parallel with capacitance C2 to grid G of FET VT1; the canoed S- of input power is connected directly with source S of FET VT1; grid G and source S of FET VT1 are parallel via resistances R7, R8; the drain D of FET VT1 is cathode V- of rectifier output. When input is cut off, the FET is cut off, output of rectifier and load can not form loop, the geist load can be demagnetized quickly. Capacitance and piezoresistance are added to two sides of FET switches to absorb surge of geist load to protect FET.
Description
Technical field
The present invention relates to a kind of rectifier.Particularly relate to a kind of when the input side rectifier power supply disconnects, inductive load also rapidly the use field effect transistor of demagnetization as the disjunction rectifier of built-in switch.
Background technology
At present, general rectifier is in the load of output side joint, during rectifier work, inductive load work, when rectifier is not worked, because the characteristic of inductive load, in the DC side formation loop of inductive load and rectifier, and inductive load needs the regular hour could eliminate the inductive load magnetic field of causing because of its characteristic fully.But in the occasion of some practical applications, when requiring the input side disconnection of rectifier, inductive load is demagnetization rapidly also.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of when the input side rectifier power supply disconnects, inductive load also rapidly the use field effect transistor of demagnetization as the disjunction rectifier of built-in switch.
The technical solution adopted in the present invention is: a kind of disjunction rectifier that uses field effect transistor as built-in switch, shunt resistance first rectification unit that constitutes in parallel with second diode that is formed by the 5th piezo-resistance and the series connection of the 6th piezo-resistance is arranged, the positive ends of described first rectification unit connects the positive pole of input power supply, and the negative polarity end constitutes the cathode output end of rectifier; Also be provided with shunt resistance second rectification unit that constitutes in parallel that forms by the 3rd piezo-resistance and the series connection of the 4th piezo-resistance with first diode, the negative polarity end of described second rectification unit connects the cathode output end of rectifier, and positive ends connects the negative pole of input power supply; The negative pole of input power supply also connects the tenth resistance and second electric capacity respectively, and the other end of the tenth resistance connects the grid of field effect transistor, the grid of another termination field effect transistor of second electric capacity by the 9th resistance; The negative pole of input power supply also connects the source electrode of field effect transistor; The grid of field effect transistor is connected with source electrode with the 8th resistance by the 7th resistance respectively, and the drain electrode of field effect transistor is the negative pole of rectifier output end.
Also be provided with the capacitance-resistance absorption circuit between the cathode output end of described rectifier and the negative input of rectifier, described capacitance-resistance absorption circuit is to be made of with first electric capacity is in parallel the shunt resistance that first piezo-resistance and the series connection of second piezo-resistance form.
Use field effect transistor of the present invention is as the disjunction rectifier of built-in switch, owing in the loop of rectifier, add field effect transistor, when rectifier input power supply disconnects, field effect transistor disconnects, make the outlet side and the load of rectifier can not form the loop, so when the input side rectifier power supply disconnected, inductive load is demagnetization rapidly also.Increase electric capacity and piezo-resistance simultaneously in the fet switch both sides, the surge of inductive load has been protected field effect transistor after disconnecting in order to absorption circuit.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is the circuit theory diagrams of another embodiment of the present invention.
Embodiment
Provide specific embodiment below in conjunction with accompanying drawing, further specify the disjunction rectifier of use field effect transistor of the present invention as built-in switch.
As shown in Figure 1, use field effect transistor of the present invention is as the disjunction rectifier of built-in switch, shunt resistance first rectification unit that constitutes in parallel with the second diode D2 that is formed by the 5th piezo-resistance R5 and the 6th piezo-resistance R6 series connection is arranged, and the positive ends of described first rectification unit connects the anodal S of input power supply
+, the negative polarity end constitutes the cathode output end V of rectifier
+Also be provided with shunt resistance second rectification unit that constitutes in parallel with the first diode D1 that is formed by the 3rd piezo-resistance R3 and the 4th piezo-resistance R4 series connection, the negative polarity end of described second rectification unit connects the cathode output end V of rectifier
+, positive ends connects the negative pole S of input power supply
-The negative pole S of input power supply
-The other end that also connects the tenth resistance R 10 and second capacitor C, 2, the ten resistance R 10 respectively connects the grid G of field effect transistor VT1, the grid G of another termination field effect transistor VT1 of second capacitor C 2 by the 9th resistance R 9; The negative pole S of input power supply
-The source S that also connects field effect transistor VT1; The grid G of field effect transistor VT1 is connected with source S with the 8th resistance R 8 by the 7th resistance R 7 respectively, and the drain D of field effect transistor VT1 is the negative pole V of rectifier output end
-Add field effect transistor as mentioned above in the loop of rectifier, when the input of rectifier power supply disconnected, field effect transistor disconnected, and makes the outlet side of rectifier and load can not form the loop, so when the input side rectifier power supply disconnected, inductive load is demagnetization rapidly also.
As shown in Figure 2, the cathode output end V of described rectifier
-Negative input S with rectifier
-Between also be provided with the capacitance-resistance absorption circuit, disconnect the surge of back inductive load in order to absorption circuit, protected field effect transistor.To be the shunt resistance that formed by the first piezo-resistance R1 and second piezo-resistance R2 series connection constitute with first capacitor C 1 is in parallel described capacitance-resistance absorption circuit.
Claims (2)
1. disjunction rectifier that uses field effect transistor as built-in switch, first rectification unit of the shunt resistance formation in parallel with second diode (D2) that is formed by the 5th piezo-resistance (R5) and the 6th piezo-resistance (R6) series connection is arranged, and the positive ends of described first rectification unit connects the positive pole (S of input power supply
+), the negative polarity end constitutes the cathode output end (V of rectifier
+); It is characterized in that, also be provided with second rectification unit of the shunt resistance formation in parallel with first diode (D1) that is formed by the 3rd piezo-resistance (R3) and the 4th piezo-resistance (R4) series connection, the negative polarity end of described second rectification unit connects the cathode output end (V of rectifier
+), positive ends connects the negative pole (S of input power supply
-); Negative pole (the S of input power supply
-) also connecting the tenth resistance (R10) and second electric capacity (C2) respectively, the other end of the tenth resistance (R10) connects the grid (G) of field effect transistor (VT1), the grid (G) of another termination field effect transistor (VT1) of second electric capacity (C2) by the 9th resistance (R9); Negative pole (the S of input power supply
-) also connect the source electrode (S) of field effect transistor (VT1); The grid (G) of field effect transistor (VT1) is connected with source electrode (S) with the 8th resistance (R8) by the 7th resistance (R7) respectively, and the drain electrode (D) of field effect transistor (VT1) is the negative pole (V of rectifier output end
-).
2. use field effect transistor according to claim 1 is characterized in that as the disjunction rectifier of built-in switch, the cathode output end (V of described rectifier
-) with the negative input (S of rectifier
-) between also be provided with the capacitance-resistance absorption circuit, described capacitance-resistance absorption circuit is the shunt resistance and first electric capacity (C1) formation in parallel that is formed by the series connection of first piezo-resistance (R1) and second piezo-resistance (R2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100572513A CN100514789C (en) | 2007-04-27 | 2007-04-27 | Rectifier with quick disjunction inductive load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100572513A CN100514789C (en) | 2007-04-27 | 2007-04-27 | Rectifier with quick disjunction inductive load |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101087066A CN101087066A (en) | 2007-12-12 |
| CN100514789C true CN100514789C (en) | 2009-07-15 |
Family
ID=38937889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100572513A Expired - Fee Related CN100514789C (en) | 2007-04-27 | 2007-04-27 | Rectifier with quick disjunction inductive load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100514789C (en) |
-
2007
- 2007-04-27 CN CNB2007100572513A patent/CN100514789C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101087066A (en) | 2007-12-12 |
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