CN104682763A - Method and device for high-speed off of energy-feedback constant-voltage clamp - Google Patents
Method and device for high-speed off of energy-feedback constant-voltage clamp Download PDFInfo
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- CN104682763A CN104682763A CN201510103401.4A CN201510103401A CN104682763A CN 104682763 A CN104682763 A CN 104682763A CN 201510103401 A CN201510103401 A CN 201510103401A CN 104682763 A CN104682763 A CN 104682763A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
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- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Inverter Devices (AREA)
Abstract
The invention relates to a device for the high-speed off of an energy-feedback constant-voltage clamp. The device comprises a constant voltage source circuit, a clamp circuit and an H bridge inverter circuit, wherein the constant voltage source circuit provides stable voltage during the falling edge of emission current; the clamp circuit provides a current pathway for a transmitting antenna during the falling edge of the emission current, and energy in the transmitting antenna is released to the constant voltage source circuit, so that the voltage on the transmitting antenna reaches a voltage value of a constant voltage source to realize the voltage clamp purpose. The invention further provides a method for the high-speed off of a transient electromagnetic transmitter and the energy-feedback constant-voltage clamp. The device provided by the invention can realize high-speed and linear off during the falling edge of the current, is small in tail oscillation, effectively restrains current overshoot, feeds back the energy stored in the transmitting antenna during the falling edge to the constant-voltage source and releases during the rising edge of a next emission current pulse, so that the current rapidly rises, the energy loss is reduced, moreover, the working efficiency of the transmitter is improved.
Description
Technical field
The present invention relates to field of geophysical exploration, more specifically, relate to a kind of energy regenerative constant voltage clamper high speed turn-off method and apparatus.
Background technology
Transient electromagnetic method (Transient Electromagnetic Method, be abbreviated as TEM) be a kind of geologic structure detection method applied in geophysics science widely, its operation principle utilizes transmitter to produce bi-directional pulse current in transmitting antenna, excite pulsatile once magnetic field, at pulsatile once magnetic field tempus intercalare, measure induction field (secondary field) field over time produced by underground medium, then by the research to secondary field, the information of subsurface material body is obtained.In recent years, based on mineral resources exploration application and energy strategy demand, transient electromagnetic method obtains fast development.
Emission current trailing edge high speed turn-off technology is the key point of Transient Electromagnetic Transmitter.For underground shallow part detection, always require that turn-off delay time is tried one's best short, be conducive to observation secondary field early signal like this, in addition, turn-off delay time is shorter, and corresponding high fdrequency component is abundanter, and the resolution of its superficial part detection is higher; Detect for deep, need to observe secondary field signal in late period, in order to improve signal strength signal intensity in late period, require on the one hand to increase emission current, to strengthen the electromagnetic response of geology of deep part structure, require that turn-off delay time shortens on the other hand as far as possible, because turn-off delay time is shorter, corresponding induced electromotive force is stronger, then the signal in late period observed is also stronger, thus the investigation depth of effective raising system.
The transmitting antenna that transient electromagnetic emission system uses is generally single turn or the earth-free loop line of multiturn, has the advantages that inductance is large, resistance is little.Therefore, at the trailing edge of transmitter output current, due to the energy storage effect of transmitting antenna inductance, electric current can not be zero immediately, but declines with exponential law, does not meet the requirement of transient electromagnetic systematic difference.
In addition, existing Transient Electromagnetic Transmitter electric current trailing edge processing method comprises: RCD (Resistor & Capacitor & Diode) circuit, RC (Resistor & Capacitor) circuit, energy-dissipating type quasi-resonance circuit that (1) is traditional, can reduce turn off delay time to a certain extent, and the linearity in late period of electric current trailing edge is better.(2) Transient Voltage Suppressor (Transient Voltage Suppressor, TVS) constant voltage clamp circuit, when the high energy impact events of moment is born at TVS pipe two ends, its impedance can be made suddenly to reduce with high speed, pass through instantaneous large-current, absorb the energy in transmitting antenna, its voltage clamping is numerically predetermined at one, electric current trailing edge high speed turn-off can be realized.(3) Zener diode regulator constant voltage clamp circuit, when Zener diode regulator is connected in reverse parallel in transmitting antenna two ends, can absorb transmitting antenna energy fast, by the stable voltage of transmitting antenna both end voltage clamper at Zener diode regulator.
But; there is following technological deficiency in above-mentioned prior art: the processing methods such as RCD, RC that (1) is traditional can provide comparatively effective bleed-off circuit for the energy in transmitting antenna; protection electronic switch is not launched the self induction voltage damage that antenna produces; but the method electric current decrease speed is slow; and the early stage linearity is poor, well cannot meet the requirement of transient electromagnetic systematic difference.(2) TVS method can realize the short turn off delay time of trailing edge electric current, but TVS can not bear repeated transient pulse for a long time, and endergonic accumulation can make it burn, and therefore can only be applicable to small-power emission system; In addition, there is larger junction capacitance in TVS device, emission current can be made to vibrate.(3) Zener diode regulator method can realize emission current and declines fast, but there is overshoot and vibration in emission current trailing edge afterbody, and along with the accumulation of service time, Zener diode regulator absorbs energy heating, the voltage at its two ends can vary with temperature, cause emission current trailing edge metamorphosis, emission current is of low quality, directly affects the Effect on Detecting of system.
Summary of the invention
For above-mentioned technological deficiency, one of main purpose of the present invention is to provide a kind of Transient Electromagnetic Transmitter emission current trailing edge cut-off method, to realize Transient Electromagnetic Transmitter emission current trailing edge high speed, linearly to turn off, and oscillating tail is little, thus greatly improve emission current quality, improve transient system buried target exploration ability.
For achieving the above object, technical solution of the present invention is:
As one aspect of the present invention, the invention provides a kind of energy regenerative constant voltage clamper high speed turn-off device, comprise H-bridge inverter circuit, clamp circuit and the constant voltage power supply circuit of connecting successively, it is characterized in that,
Described H-bridge inverter circuit is made up of four electronic switches, is realized the generation of the output signal of the Bipolar current be input on output device by the conducting and cut-off controlling described electronic switch;
Described constant voltage power supply circuit is constant voltage output circuit, for providing a stable voltage during the electric current trailing edge of described output signal, the electric current of described output signal is linearly declined fast; And
Described clamp circuit comprises an electronic switch and a diode, for during the electric current trailing edge of described output signal, current path is provided to release on described constant voltage power supply circuit by the energy in described output device by described diode, make the voltage of described output signal not higher than the magnitude of voltage of described constant voltage power supply circuit, realize voltage clamping object, and during next one output signal rise-time of current, by the fault offset of releasing on constant voltage power supply circuit during last electric current trailing edge on described output device, steady state is in realize constant source voltage.
Wherein, in described clamp circuit and H-bridge inverter circuit, the kind of electronic switch includes but not limited to IGBT switch, switch mosfet and SCR switch, diode in described clamp circuit is the body diode of described electronic switch inside, or the external diode selected specially.
Wherein, in described energy regenerative constant voltage clamper high speed turn-off device, different types of electronic switch is used.
Wherein, described constant voltage power supply circuit comprises booster circuit, constant-current charging circuit, accumulator and constant-voltage control circuit, wherein,
Described booster circuit is isolation boosting circuit, for being the magnitude of voltage U with barrier properties by the photovoltaic conversion of described output signal
h;
Described accumulator is the circuit that one or more capacitor is in parallel or connect, and the withstand voltage of described electric capacity is greater than the magnitude of voltage U of described booster circuit
h;
Described constant-current charging circuit between described booster circuit and described accumulator, when the voltage in described accumulator is lower than U
htime, booster circuit is charged to described accumulator with constant electric current by described constant-current circuit, when the magnitude of voltage in described accumulator reaches U
htime, described constant-current circuit no longer charges to accumulator; And
Described constant-voltage control circuit is hysteresis loop comparator circuit, having two unequal threshold values and forms hysteretic loop, by comparing described booster circuit and described accumulator voltage, controlling described magnitude of voltage U
hchange between two thresholds.
Wherein, described magnitude of voltage U
hnumber range a few hectovolt on kilovolt.
Wherein, described clamp circuit comprises clamp switch circuit and constant voltage clipping control unit, it is characterized in that,
Described clamp switch circuit, for during the electric current trailing edge of described output signal, by the energy of described output signal by the accumulator electric discharge in constant voltage power supply circuit described in diode pair, and during the rise-time of current of next one output signal, the energy stored in described constant voltage power supply circuit is discharged in output circuit by H-bridge inverter circuit; And
Described clipping control unit, comprise resistor voltage divider circuit and comparator circuit, by the electric resistance partial pressure value on more described accumulator and reference voltage, during the rise-time of current of described output signal, the electronic switch being responsible for electric discharge is made to complete discharging action according to the output level of described comparator circuit; The energy feedback of described accumulator gives described H-bridge inverter circuit, makes the rise-time of current of described output signal increase fast.
As another aspect of the present invention, the invention provides a kind of Transient Electromagnetic Transmitter, described Transient Electromagnetic Transmitter comprises transmitter governor circuit, transmitting antenna, and the energy regenerative constant voltage clamper high speed turn-off device as above described in any one, wherein,
Described transmitter governor circuit controls described energy regenerative constant voltage clamper high speed turn-off device, generation simultaneously for the electric current that transmits for described transmitter provides sequential logic, the repetition rate of the electric current that transmits described in simultaneously controlling, the width of current impulse, duty ratio, synchronous, warning; And
Described transmitting antenna is the output device of described energy regenerative constant voltage clamper high speed turn-off device, adopts earth-free loop line.
As another aspect of the invention, the invention provides a kind of energy regenerative constant voltage clamper high speed turn-off method of Transient Electromagnetic Transmitter as above, comprise the following steps:
During initial condition, constant voltage power supply circuit is charged to accumulator by constant-current charging circuit, makes accumulator stable output voltage U
h;
Described H-bridge inverter circuit is switched to and exports forward square-wave signal state, by the electronic switch cut-off in clamp circuit, make the output voltage of described H-bridge inverter circuit approximate the output voltage U of power supply
s, described power supply begins through diode and powers to transmitting antenna, and the electric current of described transmitting antenna rises to stationary value with exponential form;
Described H-bridge inverter circuit is switched to and exports negative sense square-wave signal state, when described electronic switch cut-off, keep the cut-off state of the electronic switch of described clamp circuit, at the electronic switch shutdown moment of described H-bridge inverter circuit, electric current on described transmitting antenna sharply changes, produce the diode forward conducting that induced voltage makes described clamp circuit, thus the energy stored in described transmitting antenna is released to described constant voltage power supply circuit by described clamp circuit, now in accumulator voltage a little more than U
h.
Wherein, further comprising the steps of:
Described H-bridge inverter circuit is switched to and exports forward square-wave signal state, make described transmitting antenna export forward square wave current; Between the emission current rising stage of described transmitting antenna, when by comparison circuit, described constant voltage power supply circuit judges that described constant voltage power supply circuit output voltage is greater than U
htime, make the electronic switch conducting of described clamp circuit, be that described H-bridge inverter circuit is powered by described constant voltage power supply circuit, described transmitting antenna both end voltage equals described constant voltage power supply circuit voltage U
h, described emission current realizes fast linear and rises to stationary value during rising edge, and the voltage now in accumulator reduces gradually, when not higher than U
htime, the electronic switch of clamp circuit cuts out;
Described H-bridge inverter circuit is switched to and exports negative sense square-wave signal state, make described transmitting antenna export negative sense square wave current; Between the emission current rising stage of described transmitting antenna, when by comparison circuit, described constant voltage power supply circuit judges that described constant voltage power supply circuit output voltage is greater than U
htime, make the electronic switch conducting of described clamp circuit, be that described H-bridge inverter circuit is powered by described constant voltage power supply circuit, described transmitting antenna both end voltage equals described constant voltage power supply circuit voltage U
h, described emission current realizes fast linear and rises to stationary value during rising edge, and the voltage now in accumulator reduces gradually, when not higher than U
htime, the electronic switch of clamp circuit cuts out.
Wherein, realized the output of described Transient Electromagnetic Transmitter square-wave signal in the positive and negative continuous successively switching between square-wave signal state of output by described H-bridge inverter circuit.
Known based on technique scheme, technical scheme of the present invention possesses following beneficial effect: (1) the present invention utilizes the constant voltage clamp methods based on constant pressure source, make the electric current in transmitting antenna realize during trailing edge at a high speed, linearly turn off, oscillating tail is little; (2) the present invention utilizes the active constant voltage clamp methods based on constant pressure source, and during making emission current rising edge, fast linear rises, and no longer exponentially slowly rises, improves the operating efficiency of transmitter; (3) energy back stored on transmitting antenna during electric current trailing edge is returned radiating circuit by the present invention, during the rising edge of next cycle, discharge back transmitting antenna, greatly reduces transmitter thermal losses, improves capacity usage ratio.
Accompanying drawing explanation
Fig. 1 is the topology diagram of energy regenerative constant voltage clamper Transient Electromagnetic Transmitter main circuit of the present invention;
Fig. 2 is Transient Electromagnetic Transmitter emission current trailing edge constant voltage clamper schematic diagram of the present invention;
Fig. 3 is the circuit topology figure of Transient Electromagnetic Transmitter constant pressure source of the present invention;
Fig. 4 is the topology diagram of the active constant voltage clamp circuit of Transient Electromagnetic Transmitter of the present invention;
Fig. 5 is the schematic diagram of the active constant voltage clamp circuit of Transient Electromagnetic Transmitter of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.
For the technological deficiency of prior art, the invention discloses a kind of Transient Electromagnetic Transmitter emission current shaping methods, the method adopts energy regenerative constant voltage clamper high speed turn-off technology, the target that the short turn off delay time of emission current, high linearity, current over pulse and oscillating tail are little can be realized, can greatly improve emission current quality, effectively improve the exploration ability of transient electromagnetic system.
More specifically, the technical scheme that the present invention solves the problems of the technologies described above is:
1. transmitter overall technical architecture:
Fig. 1 is the overall part of Transient Electromagnetic Transmitter of the present invention, mainly comprises: power supply, constant voltage power supply circuit, clamp circuit, H-bridge inverter circuit, transmitter master control, transmitting antenna.
Wherein, power supply is AC-DC power supply or batteries, for transmitter system provides energy.Constant voltage power supply circuit is stable circuit for producing high voltage, and this constant pressure source provides a stable voltage during emission current trailing edge, and emission current is linearly declined fast, and corresponding emission current and emitting voltage waveform are as shown in Figure 2.
Clamp circuit is based on IGBT (Insulated Gate Bipolar Transistor) switch, the clamp circuit of MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) switch or SCR (Silicon Controlled Rectifier) switch (following unified referred to as electronic switch), during emission current trailing edge, for transmitting antenna provides current path, energy in transmitting antenna is released on constant voltage power supply circuit, the voltage on transmitting antenna is made to reach the magnitude of voltage of constant voltage power supply circuit, realize voltage clamping object.
H-bridge inverter circuit is the H-bridge circuit of 4 electronic switch compositions, and realized the generation of Bipolar current by conducting and the cut-off of control switch, four electronic switches of H bridge can be the electronic switches of same type, also can be the electronic switches of number of different types.
Transmitter master control is the control core of transmitter, for the generation of emission current provides sequential logic, controls the repetition rate of emission current, the width of current impulse, duty ratio, synchronous, warning etc. simultaneously.
Transmitting antenna is earth-free loop line.
The Transient Electromagnetic Transmitter that the present invention relates to, its technological core is constant voltage power supply circuit and active constant voltage clamp circuit, its technical scheme is described in detail respectively in detail below.
2. constant voltage power supply circuit:
Fig. 3 is constant pressure source main circuit structure topological diagram, comprising: booster circuit, constant-current charging circuit, accumulator, constant-voltage control circuit.Its operation principle is as follows:
Wherein, booster circuit is isolation boosting circuit.Transmitter supply photovoltaic conversion is the high-voltage value U with barrier properties by booster circuit
h, be generally a few hectovolt to upper kilovolt.
Accumulator is one or more capacitor parallel connection or series circuit, and electric capacity withstand voltage must be greater than the magnitude of voltage U of booster circuit
h.
Constant-current charging circuit is between booster circuit and accumulator, and condenser voltage is charged to U by constant-current charging circuit by booster circuit
h, realize the energy-storage function of accumulator.
Constant-voltage control circuit is hysteresis loop comparator circuit, and hysteresis loop comparator circuit has two unequal threshold values and forms hysteretic loop, control voltage value U
hchange between two thresholds, by arranging two threshold values, can control voltage value U
hripple size, realize controling effectively to the constant voltage of constant pressure source.
3. active constant voltage clamp technique scheme:
Fig. 4 is the structural topology figure of active constant voltage clamp circuit of the present invention, comprising: H-bridge inverter circuit, clamp switch circuit and clipping control unit.
Wherein, clamp switch circuit is primarily of diode and electronic switch composition, its effect is during emission current trailing edge, the energy stored in transmitting antenna is discharged by diode pair constant pressure source accumulator, voltage due to constant pressure source is steady state value, thus realize electric current trailing edge constant voltage clamper, the electric current in transmitting antenna is linearly turned off fast.
Clipping control unit, primarily of electric resistance partial pressure and comparator circuit composition, by comparing electric resistance partial pressure value on accumulator and reference voltage, during rise-time of current, makes the electronic switch being responsible for electric discharge complete discharging action according to the output level of comparator.The energy feedback of accumulator, to H-bridge inverter circuit, makes emission current rising edge rise fast.
Fig. 5 is the schematic diagram of active constant voltage clamp circuit of the present invention, operation principle and clamper process as follows, comprising:
Step one: initial condition, constant voltage power supply circuit works in advance, is boosted by supply voltage, and is charged to storage capacitor by constant-current charging circuit, make its voltage stabilization to U
h.
Step 2: when electronic switch Q1, Q4 conducting, electronic switch Q2, Q3 cut-off, transmitter exports forward square wave current, and now clamper electronic switch Q5 ends, inoperative, transmitting antenna voltage approximates power supply voltage, and now clamper electronic switch Q5 is in cut-off state, supply voltage U
sbegin through diode D1 to power to transmitting antenna, emission current rises to stationary value according to index under perceptual transmitting antenna condition.
Step 3: when half-bridge electronic switch Q1, Q4 end, Q5 is still in cut-off state, at Q1, Q4 shutdown moment, electric current on perception transmitting antenna can sharply change, thus produce very high induced voltage, and induced voltage is much larger than the voltage in clamp voltage source, make the diode forward conducting in Q5.Now, the energy stored in perceptual transmitting antenna is released to accumulator by clamp circuit switch Q5 reverse parallel connection body diode.Therefore, between electric current decrement phase, transmitting antenna both end voltage has equaled the constant source voltage U of clamping action
h, transmitting antenna electric current fast linear declines.When current attenuation is zero, transmitting antenna energy trasfer is in accumulator.
Step 4: when electronic switch Q2, Q3 conducting, electronic switch Q1, Q4 cut-off, transmitter exports negative sense square wave current.Between the emission current rising stage, constant-voltage control circuit carries out electric resistance partial pressure by resistance R3, R4 to constant pressure source, then partial pressure value and reference voltage Vf are compared, make Q5 conducting, be that H-bridge inverter circuit is powered by constant pressure source, supply voltage is inoperative, and transmitting antenna both end voltage equals constant source voltage U
h, emission current realizes fast linear and rises to stationary value during rising edge.
Afterwards, transmitter constant voltage clamp circuit repeats the process of step 2 to step 4.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an energy regenerative constant voltage clamper high speed turn-off device, comprises H-bridge inverter circuit, clamp circuit and the constant voltage power supply circuit of connecting successively, it is characterized in that,
Described H-bridge inverter circuit is made up of four electronic switches, is realized the generation of the output signal of the Bipolar current be input on output device by the conducting and cut-off controlling described electronic switch;
Described constant voltage power supply circuit is constant voltage output circuit, for providing a stable voltage during the electric current trailing edge of described output signal, the electric current of described output signal is linearly declined fast; And
Described clamp circuit comprises an electronic switch and a diode, for during the electric current trailing edge of described output signal, current path is provided to release on described constant voltage power supply circuit by the energy in described output device by described diode, make the voltage of described output signal not higher than the magnitude of voltage of described constant voltage power supply circuit, realize voltage clamping object, and during next one output signal rise-time of current, by the fault offset of releasing on constant voltage power supply circuit during last electric current trailing edge on described output device, steady state is in realize constant source voltage.
2. energy regenerative constant voltage clamper high speed turn-off device according to claim 1, in wherein said clamp circuit and H-bridge inverter circuit, the kind of electronic switch includes but not limited to IGBT switch, switch mosfet and SCR switch, diode in described clamp circuit is the body diode of described electronic switch inside, or the external diode selected specially.
3. energy regenerative constant voltage clamper high speed turn-off device according to claim 2, wherein uses different types of electronic switch in described energy regenerative constant voltage clamper high speed turn-off device.
4. energy regenerative constant voltage clamper high speed turn-off device according to claim 1, wherein said constant voltage power supply circuit comprises booster circuit, constant-current charging circuit, accumulator and constant-voltage control circuit, wherein,
Described booster circuit is isolation boosting circuit, for being the magnitude of voltage U with barrier properties by the photovoltaic conversion of described output signal
n;
Described accumulator is the circuit that one or more capacitor is in parallel or connect, and the withstand voltage of described electric capacity is greater than the magnitude of voltage U of described booster circuit
n;
Described constant-current charging circuit between described booster circuit and described accumulator, when the voltage in described accumulator is lower than U
ntime, booster circuit is charged to described accumulator with constant electric current by described constant-current circuit, when the magnitude of voltage in described accumulator reaches U
ntime, described constant-current circuit no longer charges to accumulator; And
Described constant-voltage control circuit is hysteresis loop comparator circuit, having two unequal threshold values and forms hysteretic loop, by comparing described booster circuit and described accumulator voltage, controlling described magnitude of voltage U
hchange between two thresholds.
5. energy regenerative constant voltage clamper high speed turn-off device according to claim 4, wherein said magnitude of voltage U
hnumber range a few hectovolt on kilovolt.
6. energy regenerative constant voltage clamper high speed turn-off device according to claim 1, wherein said clamp circuit comprises clamp switch circuit and constant voltage clipping control unit, it is characterized in that,
Described clamp switch circuit, for during the electric current trailing edge of described output signal, by the energy of described output signal by the accumulator electric discharge in constant voltage power supply circuit described in diode pair, and during the rise-time of current of next one output signal, the energy stored in described constant voltage power supply circuit is discharged in output circuit by H-bridge inverter circuit; And
Described clipping control unit, comprise resistor voltage divider circuit and comparator circuit, by the electric resistance partial pressure value on more described accumulator and reference voltage, during the rise-time of current of described output signal, the electronic switch being responsible for electric discharge is made to complete discharging action according to the output level of described comparator circuit; The energy feedback of described accumulator gives described H-bridge inverter circuit, makes the rise-time of current of described output signal increase fast.
7. a Transient Electromagnetic Transmitter, described Transient Electromagnetic Transmitter comprises transmitter governor circuit, transmitting antenna, and the energy regenerative constant voltage clamper high speed turn-off device as described in claim 1 to 6 any one, wherein,
Described transmitter governor circuit controls described energy regenerative constant voltage clamper high speed turn-off device, generation for the electric current that transmits for described transmitter provides sequential logic, the repetition rate of the electric current that transmits described in simultaneously controlling, the width of current impulse, duty ratio, synchronous, warning; And
Described transmitting antenna is the output device of described energy regenerative constant voltage clamper high speed turn-off device, adopts earth-free loop line.
8. an energy regenerative constant voltage clamper high speed turn-off method for Transient Electromagnetic Transmitter as claimed in claim 7, comprises the following steps:
During initial condition, constant voltage power supply circuit is charged to accumulator by constant-current charging circuit, makes accumulator stable output voltage U
h;
Described H-bridge inverter circuit is switched to and exports forward square-wave signal state, by the electronic switch cut-off in clamp circuit, make the output voltage of described H-bridge inverter circuit approximate the output voltage U of power supply
s, described power supply begins through diode and powers to transmitting antenna, and the electric current of described transmitting antenna rises to stationary value with exponential form;
Described H-bridge inverter circuit is switched to and exports negative sense square-wave signal state, when electronic switch in described clamp circuit ends, keep the cut-off state of the electronic switch of described clamp circuit, at the electronic switch shutdown moment of described H-bridge inverter circuit, electric current on described transmitting antenna sharply changes, produce the diode forward conducting that induced voltage makes described clamp circuit, thus the energy stored in described transmitting antenna is released to described constant voltage power supply circuit by described clamp circuit, now in accumulator voltage a little more than U
h.
9. energy regenerative constant voltage clamper high speed turn-off method according to claim 8, wherein further comprising the steps of:
Described H-bridge inverter circuit is switched to and exports forward square-wave signal state, make described transmitting antenna export forward square wave current; Between the emission current rising stage of described transmitting antenna, when by comparison circuit, described constant voltage power supply circuit judges that described constant voltage power supply circuit output voltage is greater than U
htime, make the electronic switch conducting in described clamp circuit, be that described H-bridge inverter circuit is powered by described constant voltage power supply circuit, described transmitting antenna both end voltage equals described constant voltage power supply circuit voltage U
h, described emission current realizes fast linear and rises to stationary value during rising edge, and the voltage now in accumulator reduces gradually, when not higher than U
htime, the electronic switch of clamp circuit cuts out;
Described H-bridge inverter circuit is switched to and exports negative sense square-wave signal state, make described transmitting antenna export negative sense square wave current; Between the emission current rising stage of described transmitting antenna, when by comparison circuit, described constant voltage power supply circuit judges that described constant voltage power supply circuit output voltage is greater than U
htime, make the electronic switch conducting of described clamp circuit, be that described H-bridge inverter circuit is powered by described constant voltage power supply circuit, described transmitting antenna both end voltage equals described constant voltage power supply circuit voltage U
h, described emission current realizes fast linear and rises to stationary value during rising edge, and the voltage now in accumulator reduces gradually, when not higher than U
htime, the electronic switch of clamp circuit cuts out.
10. energy regenerative constant voltage clamper high speed turn-off method according to claim 9, wherein realizes the output of described Transient Electromagnetic Transmitter square-wave signal in the positive and negative continuous successively switching between square-wave signal state of output by described H-bridge inverter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510103401.4A CN104682763B (en) | 2015-03-10 | 2015-03-10 | Energy regenerative constant pressure clamper high speed turn-off method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510103401.4A CN104682763B (en) | 2015-03-10 | 2015-03-10 | Energy regenerative constant pressure clamper high speed turn-off method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104682763A true CN104682763A (en) | 2015-06-03 |
| CN104682763B CN104682763B (en) | 2018-05-22 |
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| CN105576992A (en) * | 2016-01-06 | 2016-05-11 | 吉林大学 | Electromagnetic emission apparatus capable of realizing flat-top maintaining and current rapid drop and control method |
| CN105743385A (en) * | 2016-04-26 | 2016-07-06 | 吉林大学 | Current waveform shaping circuit for transient electromagnetic transmitter |
| CN106208734A (en) * | 2016-08-22 | 2016-12-07 | 中国科学院电子学研究所 | Transient electromagnetic exploration system transmitter |
| CN106899329A (en) * | 2015-12-17 | 2017-06-27 | 三星电机株式会社 | Information generator and the equipment including the information generator |
| CN107017610A (en) * | 2017-05-11 | 2017-08-04 | 中国地质大学（武汉） | A kind of passive constant pressure clamper of Transient Electromagnetic Transmitter rapidly switches off circuit |
| CN107979300A (en) * | 2016-10-19 | 2018-05-01 | 中国科学院电子学研究所 | Big the magnetic moment transmitter and its method of generating current of the trapezoidal electric current of bipolarity |
| CN107991708A (en) * | 2018-01-29 | 2018-05-04 | 中国科学院电子学研究所 | A kind of bipolarity triangular wave transient electromagnetic emission system |
| CN108333988A (en) * | 2018-02-07 | 2018-07-27 | 吉林大学 | Aviation electromagnetic transmitter closed loop turns off control device and method soon |
| CN109088552A (en) * | 2017-06-14 | 2018-12-25 | 科域半导体有限公司 | AC line frequency low voltage DC power supply circuit based on dual-capacitor |
| CN110865413A (en) * | 2019-11-27 | 2020-03-06 | 中国科学院电子学研究所 | Marine controllable source electromagnetic detection system transmitter and control method thereof |
| CN112578466A (en) * | 2020-12-08 | 2021-03-30 | 重庆璀陆探测技术有限公司 | Energy-feedback type constant-voltage double-clamping circuit of transient electromagnetic transmitter and control method thereof |
| CN111352164B (en) * | 2020-03-20 | 2021-04-23 | 吉林大学 | Transient electromagnetic detection system with large transmitting magnetic moment and short turn-off time |
| CN113866835A (en) * | 2021-11-10 | 2021-12-31 | 吉林大学 | Electromagnetic emission system with time domain three-waveform combination and control method |
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| CN106899329A (en) * | 2015-12-17 | 2017-06-27 | 三星电机株式会社 | Information generator and the equipment including the information generator |
| US10721687B2 (en) | 2015-12-17 | 2020-07-21 | Wits Co., Ltd. | Information transmitter and an apparatus including the same |
| CN105576992A (en) * | 2016-01-06 | 2016-05-11 | 吉林大学 | Electromagnetic emission apparatus capable of realizing flat-top maintaining and current rapid drop and control method |
| CN105743385A (en) * | 2016-04-26 | 2016-07-06 | 吉林大学 | Current waveform shaping circuit for transient electromagnetic transmitter |
| CN105743385B (en) * | 2016-04-26 | 2018-05-04 | 吉林大学 | A kind of Transient Electromagnetic Transmitter current waveform shaping circuit |
| CN106208734A (en) * | 2016-08-22 | 2016-12-07 | 中国科学院电子学研究所 | Transient electromagnetic exploration system transmitter |
| CN107979300B (en) * | 2016-10-19 | 2020-10-27 | 中国科学院电子学研究所 | Bipolar trapezoidal current large magnetic moment transmitter and current generation method thereof |
| CN107979300A (en) * | 2016-10-19 | 2018-05-01 | 中国科学院电子学研究所 | Big the magnetic moment transmitter and its method of generating current of the trapezoidal electric current of bipolarity |
| CN107017610B (en) * | 2017-05-11 | 2019-02-05 | 中国地质大学（武汉） | A kind of passive constant pressure clamper of Transient Electromagnetic Transmitter rapidly switches off circuit |
| CN107017610A (en) * | 2017-05-11 | 2017-08-04 | 中国地质大学（武汉） | A kind of passive constant pressure clamper of Transient Electromagnetic Transmitter rapidly switches off circuit |
| CN109088552A (en) * | 2017-06-14 | 2018-12-25 | 科域半导体有限公司 | AC line frequency low voltage DC power supply circuit based on dual-capacitor |
| CN107991708A (en) * | 2018-01-29 | 2018-05-04 | 中国科学院电子学研究所 | A kind of bipolarity triangular wave transient electromagnetic emission system |
| CN108333988A (en) * | 2018-02-07 | 2018-07-27 | 吉林大学 | Aviation electromagnetic transmitter closed loop turns off control device and method soon |
| CN108333988B (en) * | 2018-02-07 | 2020-05-22 | 吉林大学 | Closed-loop fast turn-off control method for aviation electromagnetic transmitter |
| CN110865413A (en) * | 2019-11-27 | 2020-03-06 | 中国科学院电子学研究所 | Marine controllable source electromagnetic detection system transmitter and control method thereof |
| CN110865413B (en) * | 2019-11-27 | 2021-11-30 | 中国科学院电子学研究所 | Marine controllable source electromagnetic detection system transmitter and control method thereof |
| CN111352164B (en) * | 2020-03-20 | 2021-04-23 | 吉林大学 | Transient electromagnetic detection system with large transmitting magnetic moment and short turn-off time |
| CN112578466A (en) * | 2020-12-08 | 2021-03-30 | 重庆璀陆探测技术有限公司 | Energy-feedback type constant-voltage double-clamping circuit of transient electromagnetic transmitter and control method thereof |
| CN113866835A (en) * | 2021-11-10 | 2021-12-31 | 吉林大学 | Electromagnetic emission system with time domain three-waveform combination and control method |
| CN113866835B (en) * | 2021-11-10 | 2023-07-14 | 吉林大学 | Electromagnetic emission system combining time domain three waveforms and control method |
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