CN205811980U - A kind of inductive load voltage PWM degausser - Google Patents
A kind of inductive load voltage PWM degausser Download PDFInfo
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- CN205811980U CN205811980U CN201620701066.8U CN201620701066U CN205811980U CN 205811980 U CN205811980 U CN 205811980U CN 201620701066 U CN201620701066 U CN 201620701066U CN 205811980 U CN205811980 U CN 205811980U
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Abstract
The utility model discloses a kind of inductive load voltage PWM degausser.Including input protection rectification circuit and degaussing main circuit.Input protection rectification circuit is by TVS pipe or bi-directional voltage stabilizing diode, four commutation diode compositions；Degaussing main circuit is by NMOS tube M1, load L1, sustained diode 6, degaussing Zener diode D8 (or resistance), Bootstrap electric capacity C1, Bootstrap booster diode D7, Bootstrap capacitor charge and discharge circuit controls diode D10 (removable), bootstrapping divider resistance R1 (removable), bootstrapping divider resistance R2 (resistance can be zero), drive divider resistance R3, drive divider resistance R4 (resistance can be zero), pulse width modulated stage conducting NMOS tube M2 (or audion), anti-NMOS tube punctures Zener diode D9 (removable) composition.This utility model Circuit responce speed is fast, and circuit is simple, and circuit cost is low, low in energy consumption, and degaussing is fast.
Description
Technical field
This utility model relates to voltage PWM degausser, especially relates to a kind of inductive load voltage PWM
Degausser.
Background technology
Along with the fast development of electronic technology, voltage PWM technology due to its need to change dutycycle can complete right
The Linear Control of controlled device, gets more and more and is applied to every field.The wider voltage pulse width that is through wherein is applied to adjust
Technical controlling metal-oxide-semiconductor processed switchs, and utilizes fly-wheel diode simultaneously, inductive load carries out current constant control, but cuts off sense every time
Property load time, the reason can not suddenlyd change due to electric current in the existence of fly-wheel diode and inductive load, it is impossible to discharge rapidly perception
The energy accumulated in load, thus causing cutting off slack-off, traditional solution is by a Zener diode and afterflow two
Pole pipe series connection, realizes afterflow as an afterflow entirety, or a resistance and fly-wheel diode is connected, continue as one
Stream entirety realizes afterflow, but owing to voltage PWM needs speed-sensitive switch metal-oxide-semiconductor to control electric current, therefore can cause
State the overall frequently break-make of afterflow, thus cause Zener diode frequently to puncture and flow through ohmically electric current relatively greatly, ultimately result in
Zener diode or ohmically power consumption are very big, and therefore traditional method can not well solve the problems referred to above, and this is accomplished by one
Circuit is when voltage PWM speed-sensitive switch metal-oxide-semiconductor control inductive loads, and Zener diode (or resistance) does not works, and when cutting
During disconnected inductive load, Zener diode (or resistance) works, and so can reduce the power consumption of diode (or resistance).
Utility model content
For realizing when voltage PWM speed-sensitive switch metal-oxide-semiconductor control inductive loads, Zener diode (or resistance) is no
Work, and when cutting off inductive load, Zener diode (or resistance) works, simultaneously because after cutting off inductive load, above it
The decrease speed of electric current be directly proportional with backward voltage, if using resistance, then flowing through ohmically voltage can be more and more less, thus
Electric current decrease speed can be increasingly slower, if using Zener diode, then on Zener diode, voltage is substantially stationary, therefore under electric current
Reduction of speed degree substantially constant.Therefore the purpose of this utility model is to provide a kind of inductive load voltage PWM degausser,
During the load of voltage PWM speed-sensitive switch metal-oxide-semiconductor control inductive, Zener diode does not works, and when cutting off inductive load,
Zener diode works.
The technical solution adopted in the utility model is:
Scheme one: a kind of inductive load voltage PWM degausser:
This utility model includes input protection rectification circuit and degaussing main circuit；Input protection rectification circuit, including rectification
Four diode D2～D5 and two-way TVS pipe or bi-directional voltage stabilizing diode D1；Degaussing main circuit, including NMOS tube M1, NMOS tube
M2, audion Q1, load L1, Zener diode D8, two diodes D6, D7, electric capacity C1 and four resistance R1～R4；Load L1
One end connect the positive pole of Zener diode D8, the source electrode of NMOS tube M2 or the emitter stage of audion Q1, one end of resistance R3 respectively
Being followed by VCC with the positive pole of diode D7, the other end of load L1 connects the positive pole of diode D6 and the drain electrode of NMOS tube M1 respectively,
The source electrode of NMOS tube M1 meets GND, and the grid of NMOS tube M1 is input protection rectification circuit input end, and the positive pole of diode D6 connects electricity
One end of resistance R2, one end of the negative pole of diode D7 connecting resistance R1 respectively and through resistance R4 connecting resistance R3 the other end, meet NMOS
Being total to of the grid of pipe M2 or the base stage of audion Q1, the other end of the other end connecting resistance R1 of electric capacity C1 and the other end of resistance R3
Contact, the drain electrode of NMOS tube M2 or the colelctor electrode of audion Q1, connect the negative pole of Zener diode D6 and the negative of Zener diode D8
Extremely it is total to contact.
Described degaussing main circuit, also includes diode D10；The negative pole of diode D7 distinguishes one end of connecting resistance R1, through two
Pole pipe D10 connects one end of electric capacity C1, one end of electric capacity C1 is followed by the grid of NMOS tube M2 through the other end of resistance R4 connecting resistance R3
Or the base stage of audion Q1.
Scheme two: a kind of inductive load voltage PWM degausser: this utility model includes input protection rectified current
Road and degaussing main circuit；Input protection rectification circuit, including four diode D2～D5 of rectification and two-way TVS pipe or two-way surely
Pressure diode D1；Degaussing main circuit, including NMOS tube M1, NMOS tube M2, audion Q1, load L1, two diode D6～
D7, electric capacity C1 and five resistance R1～R5；One end of load L1 one end of connecting resistance R5, the source electrode of NMOS tube M2 or three poles respectively
The positive pole of the emitter stage of pipe Q1, one end of resistance R3 and diode D7 is followed by VCC, and the other end of load L1 meets diode D6 respectively
Positive pole and the drain electrode of NMOS tube M1, the source electrode of NMOS tube M1 meets GND, the grid of NMOS tube M1 for input protection rectification circuit defeated
Enter end, one end of the positive pole connecting resistance R2 of diode D6, the negative pole of diode D7 one end of connecting resistance R1 respectively, the one of electric capacity C1
End, electric capacity C1 one end through the other end of resistance R4 connecting resistance R3 and the grid of NMOS tube M2 or the base stage of audion Q1, NMOS
The drain electrode of pipe M2 or the colelctor electrode of audion Q1 connect the negative pole of Zener diode D6 and the common contact of the other end of resistance R3, electric capacity
The other end connecting resistance R1 other end of C1 and the common contact of the resistance R3 other end.
Scheme three: a kind of inductive load voltage PWM degausser: this utility model includes input protection rectified current
Road and degaussing main circuit；Input protection rectification circuit, including four diode D2～D5 of rectification and two-way TVS pipe or two-way surely
Pressure diode D1；Degaussing main circuit, including NMOS tube M1～M2, loads L1, Zener diode D8～D9, two diode D6～
D7, electric capacity C1 and five resistance R1～R5；One end of load L1 connect respectively the positive pole of Zener diode D8 or one end of resistance R5,
The positive pole of the source electrode of NMOS tube M2, one end of resistance R3, the positive pole of Zener diode D9 and diode D7 is followed by VCC, loads L1
The other end connect the positive pole of diode D6 and the drain electrode of NMOS tube M1 respectively, the source electrode of NMOS tube M1 meets GND, deleting of NMOS tube M1
Extremely input protection rectification circuit input end, one end of the positive pole connecting resistance R2 of diode D6, the negative pole of diode D7 connects respectively
One end of resistance R1, one end of electric capacity C1, electric capacity C1 one end through resistance R4 connect the negative pole of Zener diode D9, resistance R3 another
One end and the grid of NMOS tube M2, the drain electrode of NMOS tube M2 connects connecing altogether of the negative pole of diode D6 and the negative pole of Zener diode D8
Point, or the negative pole of diode D6 and the common contact of the resistance R3 other end.The other end connecting resistance R1 other end of electric capacity C1 and resistance
The common contact of the R3 other end.
Scheme four: a kind of inductive load voltage PWM degausser: this utility model includes input protection rectified current
Road and degaussing main circuit；Input protection rectification circuit, including four diode D2～D5 of rectification and two-way TVS pipe or two-way surely
Pressure diode D1；Degaussing main circuit, including NMOS tube M1, NMOS tube M2, audion Q1, load L1, Zener diode D8, three
Diode D6, D7, D10, electric capacity C1 and five resistance R1～R5；One end of load L1 one end of connecting resistance R5, NMOS tube respectively
The positive pole of the source electrode of M2 or the emitter stage of audion Q1, one end of resistance R3 and diode D7 is followed by VCC, the other end of load L1
Connecing the positive pole of diode D6 and the drain electrode of NMOS tube M1 respectively, the source electrode of NMOS tube M1 meets GND, and the grid of NMOS tube M1 is input
Protection rectification circuit input end, one end of the positive pole connecting resistance R2 of diode D6, the negative pole of diode D7 connecting resistance R1's respectively
One end and through diode D10 connect one end of electric capacity C1, electric capacity C1 one end through the other end of resistance R4 connecting resistance R3 and NMOS tube
The grid of M2 or the base stage of audion Q1, the drain electrode of NMOS tube M2 or the colelctor electrode of audion Q1 connect diode D6 negative pole and resistance
The common contact of the other end of R5, the other end connecting resistance R1 other end of electric capacity C1 and the common contact of the resistance R3 other end.
Scheme five: a kind of inductive load voltage PWM degausser: this utility model includes input protection rectified current
Road and degaussing main circuit；Input protection rectification circuit, including four diode D2～D5 of rectification and two-way TVS pipe or two-way surely
Pressure diode D1；Degaussing main circuit, including NMOS tube M1～M2, loads L1, Zener diode D8～D9, two diode D6,
D7, D10, electric capacity C1 and five resistance R1～R5；One end of load L1 connects the positive pole of Zener diode D8 or resistance R5's respectively
The positive pole of one end, the source electrode of NMOS tube M2, one end of resistance R3, the positive pole of Zener diode D9 and diode D7 is followed by VCC, negative
The other end carrying L1 connects the positive pole of diode D6 and the drain electrode of NMOS tube M1 respectively, and the source electrode of NMOS tube M1 connects GND, NMOS tube M1
Grid for input protection rectification circuit input end, one end of the positive pole connecting resistance R2 of diode D6, the negative pole of diode D7 divides
One end of other connecting resistance R1, connect one end of electric capacity C1 through diode D10, one end of electric capacity C1 connects voltage stabilizing two pole respectively through resistance R4
The negative pole of pipe D9, the other end of resistance R3 and the grid of NMOS tube M2, the drain electrode of NMOS tube M2 connects the negative pole of Zener diode D6
With the common contact of the negative pole of Zener diode D8, or the common contact of the other end of the negative pole of Zener diode D6 and resistance R5, electricity
Hold the other end connecting resistance R1 other end and the common contact of the resistance R3 other end of C1.
In above five kinds of schemes, the input signal of described input protection rectification circuit is direct current signal or AC signal, directly
The magnitude of voltage of stream signal is 2-1000V；The voltage effective value of AC signal is 2-1000V, and frequency is 50Hz or 60Hz；Described
The control input signal of degaussing main circuit be a voltage magnitude be 15V, frequency be the square-wave signal of 100-40000Hz.
This utility model has the beneficial effect that
This utility model Circuit responce speed is fast, can meet existing voltage PWM and carry out the sound of control inductive load
Answer speed；Circuit is simple, and circuit cost is low, the most several yuan；Applied widely, it is applicable to various voltage PWM
The circuit of control inductive load；Low in energy consumption, compared to the mode the most in parallel with Zener diode with fly-wheel diode, power consumption saves
Save 30%-99%；Degaussing is fast, and release time is that tradition is directly with the mode inductive load release time of fly-wheel diode afterflow
5%-20%。
Accompanying drawing explanation
Fig. 1 is inductive load voltage PWM degausser.
Fig. 2 is that inductive load voltage PWM degausser (substitutes pulse width modulated stage conducting NMOS with audion
Pipe).
Fig. 3 is inductive load voltage PWM degausser (substitutes with demagnetizing resistance and remove magnetic diode).
Fig. 4 be inductive load voltage PWM degausser (with audion substitute pulse width modulated stage conducting NMOS tube,
Substitute with demagnetizing resistance and remove magnetic diode).
Fig. 5 is inductive load voltage PWM degausser (increases anti-NMOS tube and puncture Zener diode).
Fig. 6 is that inductive load voltage PWM degausser (substitutes with demagnetizing resistance and removes magnetic diode, increase anti-NMOS
Pipe punctures Zener diode).
Fig. 7 is inductive load voltage PWM degausser (increases charging and discharging circuit and control diode).
Fig. 8 is that inductive load voltage PWM degausser (increases charging and discharging circuit and controls diode, replace with audion
NMOS tube is turned on) for pulse width modulated stage.
Fig. 9 is that inductive load voltage PWM degausser (increases charging and discharging circuit and controls diode, use demagnetizing resistance
Replacement removes magnetic diode).
Figure 10 is that inductive load voltage PWM degausser (increases charging and discharging circuit and controls diode, spend magnetoelectricity
Resistance replacement removes magnetic diode, substitutes pulse width modulated stage conducting NMOS tube with audion).
Figure 11 is that inductive load voltage PWM degausser (increases charging and discharging circuit and controls diode, increase anti-
NMOS tube punctures Zener diode).
Figure 12 is that inductive load voltage PWM degausser (increases charging and discharging circuit and controls diode, spend magnetoelectricity
Resistance replacement removes magnetic diode, increases anti-NMOS tube and punctures Zener diode).
Figure 13 is input protection rectification circuit.
Figure 14 is degaussing main circuit.
Detailed description of the invention
With embodiment, this utility model is further described below in conjunction with the accompanying drawings.
As shown in Figure 1 and Figure 2, this utility model includes input protection rectification circuit and degaussing main circuit；Input protection rectification
Circuit, including four diode D2～D5 of rectification and two-way TVS pipe or bi-directional voltage stabilizing diode D1；Degaussing main circuit, including
NMOS tube M1, NMOS tube M2, audion Q1, load L1, Zener diode D8, two diodes D6, D7, electric capacity C1 and four electricity
Resistance R1～R4；One end of load L1 connects the positive pole of Zener diode D8, the source electrode of NMOS tube M2 or the transmitting of audion Q1 respectively
The positive pole of pole, one end of resistance R3 and diode D7 is followed by VCC, the other end of load L1 connect respectively diode D6 positive pole and
The drain electrode of NMOS tube M1, the source electrode of NMOS tube M1 meets GND, and the grid of NMOS tube M1 is input protection rectification circuit input end, and two
One end of the positive pole connecting resistance R2 of pole pipe D6, the negative pole of diode D7 distinguishes one end of connecting resistance R1 and through resistance R4 connecting resistance
The other end of R3, the grid connecing NMOS tube M2 or the base stage of audion Q1, the other end of the other end connecting resistance R1 of electric capacity C1 and
The common contact of the other end of resistance R3, the drain electrode of NMOS tube M2 or the colelctor electrode of audion Q1, connect the negative pole of Zener diode D6
Negative pole contact altogether with Zener diode D8.
As shown in Figure 7, Figure 8, degaussing main circuit described in the utility model, also include diode D10；The negative pole of diode D7
Respectively connecting resistance R1 one end, connect another through resistance R4 connecting resistance R3 of one end of one end of electric capacity C1, electric capacity C1 through diode D10
One end is followed by grid or the base stage of audion Q1 of NMOS tube M2.
As shown in Figure 3, Figure 4, this utility model includes input protection rectification circuit and degaussing main circuit；Input protection rectification
Circuit, including four diode D2～D5 of rectification and two-way TVS pipe or bi-directional voltage stabilizing diode D1；Degaussing main circuit, including
NMOS tube M1, NMOS tube M2, audion Q1, load L1, two diode D6～D7, electric capacity C1 and five resistance R1～R5；Negative
Carry respectively one end of connecting resistance R5, one end, the source electrode of NMOS tube M2 or the emitter stage of audion Q1 of L1, one end of resistance R3 and
The positive pole of diode D7 is followed by VCC, and the other end of load L1 meets the positive pole of diode D6 and the drain electrode of NMOS tube M1, NMOS respectively
The source electrode of pipe M1 meets GND, and the grid of NMOS tube M1 is input protection rectification circuit input end, the positive pole connecting resistance R2 of diode D6
One end, the negative pole of diode D7 one end of connecting resistance R1 respectively, one end of electric capacity C1, one end of electric capacity C1 connect electricity through resistance R4
The resistance other end of R3 and the grid of NMOS tube M2 or the base stage of audion Q1, the drain electrode of NMOS tube M2 or the colelctor electrode of audion Q1
Connect the negative pole of Zener diode D6 and the common contact of the other end of resistance R3, the other end connecting resistance R1 other end of electric capacity C1 and electricity
The common contact of the resistance R3 other end.
As shown in Figure 5, Figure 6, this utility model includes input protection rectification circuit and degaussing main circuit；Input protection rectification
Circuit, including four diode D2～D5 of rectification and two-way TVS pipe or bi-directional voltage stabilizing diode D1；Degaussing main circuit, including
NMOS tube M1～M2, load L1, Zener diode D8～D9, two diode D6～D7, electric capacity C1 and five resistance R1～R5；
One end of load L1 connect respectively the positive pole of Zener diode D8 or one end of resistance R5, the source electrode of NMOS tube M2, the one of resistance R3
The positive pole of end, the positive pole of Zener diode D9 and diode D7 is followed by VCC, and the other end of load L1 is just meeting diode D6 respectively
Pole and the drain electrode of NMOS tube M1, the source electrode of NMOS tube M1 meets GND, and the grid of NMOS tube M1 is input protection rectification circuit input
End, one end of the positive pole connecting resistance R2 of diode D6, the negative pole of diode D7 one end of connecting resistance R1 respectively, the one of electric capacity C1
End, one end of electric capacity C1 connect the negative pole of Zener diode D9, the other end of resistance R3 and the grid of NMOS tube M2 through resistance R4,
The drain electrode of NMOS tube M2 connects the negative pole of diode D6 and the common contact of the negative pole of Zener diode D8, or the negative pole of diode D6 and
The common contact of the resistance R3 other end.The other end connecting resistance R1 other end of electric capacity C1 and the common contact of the resistance R3 other end.
As shown in Figure 9, Figure 10, this utility model includes input protection rectification circuit and degaussing main circuit；Input protection is whole
Current circuit, including four diode D2～D5 of rectification and two-way TVS pipe or bi-directional voltage stabilizing diode D1；Degaussing main circuit, including
NMOS tube M1, NMOS tube M2, audion Q1, load L1, Zener diode D8, three diodes D6, D7, D10, electric capacity C1 and five
Individual resistance R1～R5；One end of load L1 one end of connecting resistance R5, the source electrode of NMOS tube M2 or the emitter stage of audion Q1 respectively,
One end of resistance R3 and the positive pole of diode D7 are followed by the other end of VCC, load L1 and meet positive pole and the NMOS of diode D6 respectively
The drain electrode of pipe M1, the source electrode of NMOS tube M1 meets GND, and the grid of NMOS tube M1 is input protection rectification circuit input end, diode
One end of the positive pole connecting resistance R2 of D6, one end of the negative pole of diode D7 connecting resistance R1 respectively and meet electric capacity C1 through diode D10
One end, electric capacity C1 one end through the other end of resistance R4 connecting resistance R3 and the grid of NMOS tube M2 or the base stage of audion Q1,
The drain electrode of NMOS tube M2 or the colelctor electrode of audion Q1 meet the common contact of the other end of diode D6 negative pole and resistance R5, electric capacity C1
The other end connecting resistance R1 other end and the common contact of the resistance R3 other end.
As shown in Figure 11, Figure 12, this utility model includes input protection rectification circuit and degaussing main circuit；Input protection is whole
Current circuit, including four diode D2～D5 of rectification and two-way TVS pipe or bi-directional voltage stabilizing diode D1；Degaussing main circuit, including
NMOS tube M1～M2, load L1, Zener diode D8～D9, three diodes D6, D7, D10, electric capacity C1 and five resistance R1～
R5；One end of load L1 meets the positive pole of Zener diode D8 or one end of resistance R5, the source electrode of NMOS tube M2, resistance R3 respectively
The positive pole of one end, the positive pole of Zener diode D9 and diode D7 is followed by VCC, and the other end of load L1 connects diode D6's respectively
Positive pole and the drain electrode of NMOS tube M1, the source electrode of NMOS tube M1 meets GND, and the grid of NMOS tube M1 is input protection rectification circuit input
End, one end of the positive pole connecting resistance R2 of diode D6, the negative pole of diode D7 distinguishes one end of connecting resistance R1, through diode D10
Connect one end of electric capacity C1, electric capacity C1 one end through resistance R4 connect respectively the negative pole of Zener diode D9, the other end of resistance R3 and
The grid of NMOS tube M2, the drain electrode of NMOS tube M2 connects connecing altogether of the negative pole of Zener diode D6 and the negative pole of Zener diode D8
Point, or the common contact of the other end of the negative pole of Zener diode D6 and resistance R5, the other end connecting resistance R1 other end of electric capacity C1
Common contact with the resistance R3 other end.
With reference to shown in Fig. 1 ~ Figure 14, a kind of inductive load voltage PWM degausser, integrated circuit as it is shown in figure 1,
Shown in Fig. 2, it is the inductive load voltage PWM degausser substituting pulse width modulated stage conducting NMOS tube with audion, figure
Shown in 3, it is the inductive load voltage PWM degausser substituting with demagnetizing resistance and removing magnetic diode, shown in Fig. 4, is with three
Pole pipe substitutes pulse width modulated stage conducting NMOS tube and goes the inductive load voltage pulse width of magnetic diode to adjust by demagnetizing resistance replacement
Degausser processed, shown in Fig. 5, is to increase anti-NMOS tube and punctures the inductive load voltage PWM of Zener diode and remove magnetoelectricity
Road, shown in Fig. 6, is to substitute with demagnetizing resistance to remove magnetic diode and increase anti-NMOS tube to puncture the inductive load electricity of Zener diode
Pressure pulsewidth modulation degausser, shown in Fig. 7, the inductive load voltage PWM being to increase charging and discharging circuit control diode goes
Magnetic circuit, shown in Fig. 8, is to increase charging and discharging circuit and controls diode and substitute pulse width modulated stage conducting NMOS tube with audion
Inductive load voltage PWM degausser, shown in Fig. 9, be to increase charging and discharging circuit and control diode and use demagnetizing resistance
Substitute the inductive load voltage PWM degausser removing magnetic diode, shown in Figure 10, be to increase charging and discharging circuit and control two
Pole is managed, and substitutes with demagnetizing resistance and removes magnetic diode and substitute the inductive load electricity of pulse width modulated stage conducting NMOS tube with audion
Pressure pulsewidth modulation degausser, shown in Figure 11, is to increase charging and discharging circuit and controls diode, increase anti-NMOS tube and puncture voltage stabilizing two
The inductive load voltage PWM degausser of pole pipe, shown in Figure 12, is to increase charging and discharging circuit and controls diode, use degaussing
Resistance substitutes and removes magnetic diode and increase anti-NMOS tube to puncture the inductive load voltage PWM degausser of Zener diode,
Described inductive load voltage PWM degausser includes degaussing master shown in input protection rectification circuit shown in Figure 13 and Figure 14
Circuit.
Further, described input protection rectification circuit is managed by D1(TVS or bi-directional voltage stabilizing diode), D2, D3, D4, D5
(commutation diode) forms.Described degaussing main circuit is by M1 (pulse width modulation controlled NMOS tube), L1 (load), D6 (afterflow two pole
Pipe), D8 (degaussing Zener diode) or R5 (demagnetizing resistance), C1 (Bootstrap electric capacity), D7 (Bootstrap booster diode),
D10 (Bootstrap capacitor charge and discharge circuit controls diode (removable)), R1 (bootstrapping divider resistance (removable)), R2 are (certainly
Lift divider resistance (resistance can be zero)), R3 (driving divider resistance), R4 (drive divider resistance (resistance can be zero)) M2 (pulsewidth
Stage of modulating conducting NMOS tube (available audion substitute)), D9 (anti-NMOS tube punctures Zener diode (removable)) composition.
Further, the working method of inductive load voltage PWM degausser is described in conjunction with Fig. 1.In FIG
Inputting frequency 50Hz between Vin+ and Vin-, voltage effective value is the alternating voltage excitation of 220V, and pumping signal is through defeated
Enter to protect rectification circuit to change into full-wave direct current signal (voltage DC bias component is zero) that voltage effective value is 220V,
Simultaneously main circuit Input end is being driven to input a square-wave signal (the square wave letter that voltage magnitude is 15V, frequency is 2000Hz
Number).When circuit just powers on, when square-wave signal level is high, pulse width modulation controlled NMOS tube turns on, and loads to obtain electric work, with
Time full-wave direct current signal by Bootstrap booster diode, drive divider resistance and bootstrapping divider resistance to Bootstrap electric capacity
Charging, now Bootstrap electric capacity both end voltage is less than or equal to load both end voltage, and i.e. two drive divider resistance two ends without electricity
Pressure reduction or pressure reduction are negative value, then pulse width modulated stage conducting NMOS tube does not works；When square-wave signal level is low, pulsewidth is adjusted
System controls NMOS tube and closes, and load both end voltage is equal, and now Bootstrap electric capacity both end voltage can not be suddenlyd change, and therefore boots
Boosting booster diode cut-off, Bootstrap electric capacity is by driving divider resistance, load discharge and bootstrapping divider resistance to put simultaneously
Electricity, and the discharge time of electric capacity is more than the low level time of square wave, then be between low period at square-wave signal, drive divider resistance
Two ends produce pressure reduction, and therefore pulse width modulated stage conducting NMOS tube grid voltage turns on higher than source voltage, pulse width modulated stage
NMOS tube turns on, will degaussing Zener diode or demagnetizing resistance short circuit, now degaussing Zener diode or demagnetizing resistance not work
Making, simultaneously as load is inductive load, therefore close when pulse width modulation controlled NMOS, the electric current in load can not suddenly change,
Load and turn on NMOS tube afterflow by the pulse width modulated stage of fly-wheel diode and conducting；And when square-wave signal level is high again
Time, pulse width modulation controlled NMOS tube turns on, and full-wave direct current signal gives load charging, and full-wave direct current signal passes through Bootstrap simultaneously
Booster diode, driving divider resistance and bootstrapping divider resistance charge to Bootstrap electric capacity, now Bootstrap electric capacity two ends
Voltage is less than or equal to load both end voltage, and i.e. two drive divider resistance two ends no-voltage difference or pressure reduction is negative value, then pulsewidth
Stage of modulating conducting NMOS tube does not works, and the such working in reciprocating mode of circuit can complete the current constant control to inductive load, the most again
Pulse width modulated stage degaussing Zener diode or demagnetizing resistance work is avoided to produce bigger power consumption, and when needing cut-out perception
During load, square-wave signal is low, and now Bootstrap electric capacity discharges electric charge by divider resistance, when divider resistance both end voltage is little
When pulse width modulated stage conducting NMOS tube minimum conducting voltage, pulse width modulated stage conducting NMOS tube is closed, then degaussing voltage stabilizing
Diode or demagnetizing resistance work, inductive load is by fly-wheel diode and degaussing Zener diode or demagnetizing resistance release magnetic
Property.
Above-mentioned detailed description of the invention is used for illustrating this utility model rather than limiting this utility model,
In spirit of the present utility model and scope of the claims, any modifications and changes that this utility model is made, all fall
Enter protection domain of the present utility model.
Claims (6)
1. an inductive load voltage PWM degausser, it is characterised in that: include input protection rectification circuit and degaussing
Main circuit；Input protection rectification circuit, including four diode D2～D5 of rectification and two-way TVS pipe or bi-directional voltage stabilizing diode
D1；Degaussing main circuit, including NMOS tube M1, NMOS tube M2, audion Q1, loads L1, Zener diode D8, two diodes
D6, D7, electric capacity C1 and four resistance R1～R4；One end of load L1 connects the positive pole of Zener diode D8, NMOS tube M2 respectively
The positive pole of source electrode or the emitter stage of audion Q1, one end of resistance R3 and diode D7 is followed by VCC, and the other end of load L1 is respectively
Connecing the positive pole of diode D6 and the drain electrode of NMOS tube M1, the source electrode of NMOS tube M1 meets GND, and the grid of NMOS tube M1 is input protection
Rectification circuit input end, one end of the positive pole connecting resistance R2 of diode D6, one end of the negative pole of diode D7 connecting resistance R1 respectively,
With through the other end of resistance R4 connecting resistance R3, the grid connecing NMOS tube M2 or the base stage of audion Q1, another of electric capacity C1 terminates
The other end of resistance R1 and the common contact of the other end of resistance R3, the drain electrode of NMOS tube M2 or the colelctor electrode of audion Q1, connect steady
The negative pole of pressure diode D6 and the negative pole of Zener diode D8 contact altogether.
A kind of inductive load voltage PWM degausser the most according to claim 1, it is characterised in that: described degaussing
Main circuit, also includes diode D10；One end of the negative pole of diode D7 connecting resistance R1 respectively, connect electric capacity C1's through diode D10
One end, one end of electric capacity C1 are followed by grid or the base stage of audion Q1 of NMOS tube M2 through the other end of resistance R4 connecting resistance R3.
3. an inductive load voltage PWM degausser, it is characterised in that: include input protection rectification circuit and degaussing
Main circuit；Input protection rectification circuit, including four diode D2～D5 of rectification and two-way TVS pipe or bi-directional voltage stabilizing diode
D1；Degaussing main circuit, including NMOS tube M1, NMOS tube M2, audion Q1, loads L1, two diode D6～D7, electric capacity C1
With five resistance R1～R5；One end of load L1 one end of connecting resistance R5, the source electrode of NMOS tube M2 or audion Q1 respectively send out
The positive pole of emitter-base bandgap grading, one end of resistance R3 and diode D7 is followed by VCC, the other end of load L1 connect respectively diode D6 positive pole and
The drain electrode of NMOS tube M1, the source electrode of NMOS tube M1 meets GND, and the grid of NMOS tube M1 is input protection rectification circuit input end, and two
One end of the positive pole connecting resistance R2 of pole pipe D6, the negative pole of diode D7 one end of connecting resistance R1, one end of electric capacity C1, electric capacity respectively
One end of C1 is through the other end of resistance R4 connecting resistance R3 and the grid of NMOS tube M2 or the base stage of audion Q1, the leakage of NMOS tube M2
The colelctor electrode of pole or audion Q1 connects the negative pole of Zener diode D6 and the common contact of the other end of resistance R3, another of electric capacity C1
The terminating resistor R1 other end and the common contact of the resistance R3 other end.
4. an inductive load voltage PWM degausser, it is characterised in that: include input protection rectification circuit and degaussing
Main circuit；Input protection rectification circuit, including four diode D2～D5 of rectification and two-way TVS pipe or bi-directional voltage stabilizing diode
D1；Degaussing main circuit, including NMOS tube M1～M2, loads L1, Zener diode D8～D9, two diode D6～D7, electric capacity
C1 and five resistance R1～R5；One end of load L1 connects positive pole or one end of resistance R5, the NMOS tube of Zener diode D8 respectively
The positive pole of the source electrode of M2, one end of resistance R3, the positive pole of Zener diode D9 and diode D7 is followed by another of VCC, load L1
End connects the positive pole of diode D6 and the drain electrode of NMOS tube M1 respectively, and the source electrode of NMOS tube M1 meets GND, and the grid of NMOS tube M1 is defeated
Enter and protect rectification circuit input end, one end of the positive pole connecting resistance R2 of diode D6, the negative pole of diode D7 connecting resistance R1 respectively
One end, one end of electric capacity C1, electric capacity C1 one end through resistance R4 connect the negative pole of Zener diode D9, the other end of resistance R3 and
The grid of NMOS tube M2, the drain electrode of NMOS tube M2 connects the negative pole of diode D6 and the common contact of the negative pole of Zener diode D8, or
The negative pole of diode D6 and the common contact of the resistance R3 other end, the other end connecting resistance R1 other end of electric capacity C1 and resistance R3 another
The common contact of end.
5. an inductive load voltage PWM degausser, it is characterised in that: include input protection rectification circuit and degaussing
Main circuit；Input protection rectification circuit, including four diode D2～D5 of rectification and two-way TVS pipe or bi-directional voltage stabilizing diode
D1；Degaussing main circuit, including NMOS tube M1, NMOS tube M2, audion Q1, loads L1, Zener diode D8, three diodes
D6, D7, D10, electric capacity C1 and five resistance R1～R5；One end of load L1 one end of connecting resistance R5, the source of NMOS tube M2 respectively
The positive pole of pole or the emitter stage of audion Q1, one end of resistance R3 and diode D7 is followed by VCC, and the other end of load L1 connects respectively
The positive pole of diode D6 and the drain electrode of NMOS tube M1, the source electrode of NMOS tube M1 meets GND, and the grid of NMOS tube M1 is whole for input protection
Current circuit input, one end of the positive pole connecting resistance R2 of diode D6, one end of the negative pole of diode D7 connecting resistance R1 respectively and
Through diode D10 connect one end of electric capacity C1, electric capacity C1 one end through the other end of resistance R4 connecting resistance R3 and deleting of NMOS tube M2
Pole or the base stage of audion Q1, the drain electrode of NMOS tube M2 or the colelctor electrode of audion Q1 connect the another of diode D6 negative pole and resistance R5
The common contact of one end, the other end connecting resistance R1 other end of electric capacity C1 and the common contact of the resistance R3 other end.
6. an inductive load voltage PWM degausser, it is characterised in that: include input protection rectification circuit and degaussing
Main circuit；Input protection rectification circuit, including four diode D2～D5 of rectification and two-way TVS pipe or bi-directional voltage stabilizing diode
D1；Degaussing main circuit, including NMOS tube M1～M2, loads L1, Zener diode D8～D9, three diodes D6, D7, D10, electricity
Hold C1 and five resistance R1～R5；
One end of load L1 meets positive pole or one end of resistance R5, the source electrode of NMOS tube M2, the resistance R3 of Zener diode D8 respectively
The positive pole of one end, the positive pole of Zener diode D9 and diode D7 be followed by VCC, the other end of load L1 meets diode D6 respectively
Positive pole and the drain electrode of NMOS tube M1, the source electrode of NMOS tube M1 meets GND, the grid of NMOS tube M1 for input protection rectification circuit defeated
Entering end, one end of the positive pole connecting resistance R2 of diode D6, the negative pole of diode D7 distinguishes one end of connecting resistance R1, through diode
D10 connects one end of electric capacity C1, one end of electric capacity C1 connects the negative pole of Zener diode D9, the other end of resistance R3 respectively through resistance R4
With the grid of NMOS tube M2, the drain electrode of NMOS tube M2 connects connecing altogether of the negative pole of Zener diode D6 and the negative pole of Zener diode D8
Point, or the common contact of the other end of the negative pole of Zener diode D6 and resistance R5, the other end connecting resistance R1 other end of electric capacity C1
Common contact with the resistance R3 other end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620701066.8U CN205811980U (en) | 2016-06-29 | 2016-06-29 | A kind of inductive load voltage PWM degausser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620701066.8U CN205811980U (en) | 2016-06-29 | 2016-06-29 | A kind of inductive load voltage PWM degausser |
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| CN205811980U true CN205811980U (en) | 2016-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106027016A (en) * | 2016-06-29 | 2016-10-12 | 浙江桃园科技有限公司 | Inductive load voltage pulse width modulation demagnetizing circuit |
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2016
- 2016-06-29 CN CN201620701066.8U patent/CN205811980U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106027016A (en) * | 2016-06-29 | 2016-10-12 | 浙江桃园科技有限公司 | Inductive load voltage pulse width modulation demagnetizing circuit |
| CN106027016B (en) * | 2016-06-29 | 2018-08-14 | 浙江桃园科技有限公司 | Inductive load voltage PWM degausser |
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