CN102291009B - Motor driving power supply for rotary sidewall sampler - Google Patents
Motor driving power supply for rotary sidewall sampler Download PDFInfo
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- CN102291009B CN102291009B CN201110219869.1A CN201110219869A CN102291009B CN 102291009 B CN102291009 B CN 102291009B CN 201110219869 A CN201110219869 A CN 201110219869A CN 102291009 B CN102291009 B CN 102291009B
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Abstract
The invention relates to a motor driving power supply for a rotary sidewall sampler. The driving power supply comprises a power factor correction unit, a voltage regulation unit, a modulation boosting unit, a filtering demodulation unit, an inverting commutation unit, a two-phase signal generation unit and a control unit, wherein the power factor correction unit performs power factor correction on a single-phase AC power signal to obtain a first DC signal; the voltage regulation unit receives a frequency setting control signal, and performs voltage regulation on the first DC signal to obtain a second DC signal; the modulation boosting unit receives a sinusoidal pulse width modulation signal, and converts a second power signal into a first high voltage low frequency waveform signal; the filtering demodulation unit filters the first high voltage low frequency waveform signal to obtain a second high voltage low frequency waveform signal; the inverting commutation unit receives a commutation driving pulse signal, and performs inverting commutation processing on the second high voltage low frequency waveform signal to obtain a low frequency sinusoidal signal; the two-phase signal generation unit performs phase output control processing on the low frequency sinusoidal signal to obtain a two-phase low frequency sinusoidal signal; and the control unit generates the frequency setting control signal, the sinusoidal pulse width modulation signal and the commutation driving pulse signal according to load current. The power supply can supply power directly by using a generator on a logger vehicle.
Description
Technical field
The invention relates to geological exploration techniques field, especially about the logging technique field of petroleum geology exploration and metal mineral reserves exploration, be a kind of RSCT motor drive power supply of powering about the generator that can directly use on logger car specifically.
Background technology
In the logging technique field of petroleum geology exploration and metal mineral reserves exploration, utilize core analysis to determine that the lithology of reservoir, physical parameter are an important job.At present, can obtain by drilling and coring delivery, blast impacting type sidewall coring, three kinds of modes of drilling type sidewall coring for the rock core of analyzing.Drilling and coring delivery construction actual effect is low, cost is high and affect rate of penetration; Blast impacting type sidewall coring institute coring is subject to core barrel and clashes into infringement, is unfavorable for physical analysis chemical examination, can not get the reservoir parameters such as porosity and permeability; Drilling type sidewall coring adopts hydraulic transmission technology, make the vertical drilling type borehole wall of hollow boring bit obtain rock core, little to the infringement of the original physical property of rock core, can by instrument carry out lithology, electrically, physical property and oiliness analytical test, ask for the reservoir parameter such as porosity, permeability.
The operation principle of RSCT is, ground large power supply drives the 2500W-3000W heavy-duty motor of down-hole to drive a hydraulic pump to produce hydraulic power by 7000 meters of armoured cables, drive the motor of coring to core by high pressure liquid force feed again, therefore, one of critical component of RSCT is the high-power AC motor for driving hydraulic pump works.It is that 850V, frequency are that the phase difference of 50Hz, two-phase is the AC power of 90 ° that motor requires ground driving power that voltage is provided.Motor drive power supply is the basis that ensures the normal work of motor reliably.At present for providing the power supply of driving, RSCT there is following shortcoming:
One: it is to obtain by three phase mains that motor desired phase differs from the two-way AC power of 90 °, the generator vehicle-mounted due to logger is single-phase generator, therefore existing motor cannot adopt logger mobile generator, other generators that must rely on situ of drilling well provide electric power, cannot obtain required power supply for the different area of electrical specification like this, thereby affect coring operation, and the unstable success rate that all can affect coring operation of the frequency of on-site generated power machine, voltage.
Two: between underground high-power motor and surface power supply power supply, have the armoured cable that reaches 7000 meters, common single cable core internal resistance is up to more than 200 ohm, when electric motor starting, motor terminal voltage is drawn to obtain the very low detent torque that affects motor by large electric current, and load increase can cause Motor torque to decline in coring operation, when serious, even can cause and core unsuccessfully, in the time that the instrument temperature of coring is low, can causes compared with magma force feed and cannot start phenomenon in addition.
Three: under the condition of high temperature, hydraulic oil is thinning, need to improve hydraulic pump pump amount, reveal the underpower situation causing to compensate because of hydraulic oil.The frequency of the frequency dependent well site generator of existing motor power supply, is power frequency 50Hz, cannot improve rotating speed according to the corresponding adjusting machine operation of hydraulic pump flow frequency, has reduced the success rate of coring in severe subsurface environment.
Four: existing sidewall coring system is to boost by low-frequency transformer, and the means such as voltage regulator adjusting realize the adjustable power supply of high voltage.For the linear regulated power supply of 10KW, volume and weight is all very huge, carrying inconvenience, and the conversion efficiency of linear power supply is lower than 50%, and energy waste is serious.
The problem producing while using in order to solve the motor power that linear power supply uses as drilling type sidewall coring in prior art, a kind of good mode adopts variable frequency power supply exactly, because variable frequency power supply volume is little, and changeable frequency, therefore performance is better.At present, in other industrial circle, such as industry manufacture etc., there is variable frequency power supply.But the variable frequency power supply using in other field at present but cannot be applicable to the drilling type sidewall coring process in petroleum geology exploration and metal mineral reserves exploration field.This be because, current existing variable frequency power supply is the same with above-mentioned linear power supply, still adopt be three-phase alternating current input, like this, still can produce the problem identical with above-mentioned linear power supply.And, existing variable frequency power supply is owing to not being the drilling type sidewall coring field that is applied to petroleum geology exploration and metal mineral reserves exploration, therefore, it also exists input and output not isolate and finally exports the feature of high frequency three-phase signal, and these features cannot meet distinctive input and output insulation request in drilling type sidewall coring process, and the phase difference of output two-phase is the requirement of the low frequency signal of 90 °.
Summary of the invention
Affect the problem of coring operation success rate for overcoming frequency, the change in voltage of well site generator in prior art, the invention provides a kind of RSCT motor drive power supply, can directly use the mobile generator on logger car to power.
The invention provides a kind of driving power of RSCT motor, the driving power of described RSCT motor comprises power factor correction unit, voltage-regulation unit, modulation boosting unit, demodulation by filter unit, inversion reversing unit, two phase signals generation unit and control units, wherein: power factor correction unit, for receiving the single-phase alternating current source signal of outside input, described single-phase alternating current source signal is carried out to power factor correction, obtain the first direct current signal, the first described direct current signal is input to voltage-regulation unit; Voltage-regulation unit, for the frequency setting control signal of reception control unit output, according to described frequency setting control signal, the first described direct current signal is carried out to pressure regulation, obtains the second required direct current signal of load, by the second DC signal output to modulating boosting unit; Modulation boosting unit, for the Using Sinusoidal Pulse Width Modulation signal of reception control unit output, is converted to the first high pressure low frequency waveform signal according to described drive pulse signal by the second described direct current signal; Demodulation by filter unit, for the first described high pressure low frequency waveform signal is carried out to filtering, obtains the second high pressure low frequency waveform signal; Inversion reversing unit, for the commutation drive pulse signal of reception control unit output, carries out inverse transformation to processing according to described drive pulse signal to the second described high pressure low frequency waveform signal, obtains Low Frequency Sine Signals; Two phase signals generation units, carry out phase place output for the Low Frequency Sine Signals to described and control processing, obtain two-phase Low Frequency Sine Signals; Control unit, for according to load current generated frequency setup control signal, Using Sinusoidal Pulse Width Modulation signal and commutation drive pulse signal.
RSCT motor drive power supply provided by the invention, has solved frequency, the affect problem of change in voltage on coring operation success rate of well site generator, has solved in the problem of carrying out coring operation for the different area of electrical specification.
RSCT provided by the invention adopts single-phase input with motor drive power supply, therefore can use single-phase alternator that logger car carries to power for motor drive power supply, the low frequency signal that directly output motor driving power can be used, frequency, the affect problem of change in voltage on coring operation success rate of well site generator are solved, solve simultaneously and cannot obtain required power supply for the different area of electrical specification, thereby cannot carry out the problem of coring operation.
RSCT provided by the invention can be contained in 19 cun of standard PC cases of 6U with motor drive power supply, and volume is little, lightweight, convenient in carrying.
RSCT provided by the invention can, according to operating voltage and the frequency of cable length and downhole instrument working condition adjusting motor, not be subject to the impact of generator voltage, frequency with motor drive power supply.In the time of the thicker difficulty in starting of hydraulic oil, can change the Using Sinusoidal Pulse Width Modulation signal that modulation boosting unit receives by control unit, thereby realize frequency reducing, improve the Motor torque of coring, can carry out high moment of torsion variable frequency starting, so that reach the object that the motor of coring is started by long cable cold oil; Can change the Using Sinusoidal Pulse Width Modulation signal that modulation boosting unit receives by control unit simultaneously, improve the output frequency of power supply, improve the motor speed of coring, increase hydraulic pump flow, solved under the condition of high temperature, the thinning hydraulic oil causing of hydraulic oil is revealed the problem of power of motor deficiency.
RSCT provided by the invention has adopted high frequency transformer with motor drive power supply, input and output isolation, and output is that the phase difference of two-phase is the low frequency signal of 90 °, having overcome in prior art variable frequency power supply input and output does not isolate and finally exports the shortcoming of high frequency three-phase signal, met distinctive input and output insulation request in drilling type sidewall coring process, and the phase difference of output two-phase is the requirement of the low frequency signal of 90 °.
RSCT motor drive power supply provided by the invention, at motor, from starting to running again to getting each operating state of core, output voltage and frequency are to regulate in real time according to the electric current of the load of motor.In actual job, due to a variety of causes, the load variations of motor and difference are very large, and the load variations of motor can reach 5-6 doubly from underloading to the most heavily loaded variation.Because the present invention can, according to load current regulation output voltage and frequency, therefore can adapt to the complex working condition of coring apparatus device motor, the power of avoiding motor in prior art to need is very large, and power supply is unable to supply, and makes power supply load excessive and burn power supply; And the power of avoiding motor to need is not very large, and power supply output is excessive, thereby the loss of cable or the copper loss of motor winding are strengthened, and makes the shortcoming such as cable or motor damage.Having overcome in prior art output voltage and frequency in variable frequency power supply is to immobilize, the problem that can not regulate in real time according to the electric current of motor.
RSCT motor drive power supply provided by the invention, this power supply can directly use the generator on logger car to power, power supply is output as sine wave, can overcome the long cable of existing variable frequency power supply or frequency converter and drive the high frequency attenuation problem producing, also just overcome the shortcoming that general variable frequency power supply or frequency converter need adapted reactor.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, does not form limitation of the invention.In the accompanying drawings:
Fig. 1 is a kind of RSCT motor drive power supply block diagram that the embodiment of the present invention provides.
Fig. 2 is the block diagram of the modulation boosting unit 103 that provides of the embodiment of the present invention.
Figure 3 shows that the RSCT heavy-duty motor driving power structure chart that the embodiment of the present invention provides.
Fig. 4 is the PFC topological diagram in parallel that the embodiment of the present invention provides.
Fig. 5 is the BUCK voltage regulating module schematic diagram that the embodiment of the present invention provides.
Fig. 6 is the Sine Modulated boost module principle schematic that the embodiment of the present invention provides.
Fig. 7 is the drive pulse waveform figure that the embodiment of the present invention provides.
Fig. 8 is the primary high frequency waveforms schematic diagram that the embodiment of the present invention provides.
Fig. 9 is the low-frequency high-voltage signal waveform schematic diagram that the embodiment of the present invention provides.
Figure 10 is that the inverse transformation that provides of the embodiment of the present invention is to module principle schematic diagram.
Figure 11 is that the commutation that the embodiment of the present invention provides drives signal and sinusoidal modulation signal graph of a relation.
Figure 12 is the Low Frequency Sine Signals that the embodiment of the present invention provides.
Figure 13 is the final output waveform figure of system that the embodiment of the present invention provides.
Figure 14 shows that the RSCT motor drive power supply schematic diagram that the embodiment of the present invention provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with execution mode and accompanying drawing, the present invention is described in further details.At this, exemplary embodiment of the present invention and explanation thereof are used for explaining the present invention, but not as a limitation of the invention.
The embodiment of the present invention provides a kind of RSCT motor drive power supply that can directly use the generator on logger car to power, and below in conjunction with accompanying drawing, the present invention is described in detail.
Embodiment mono-
Fig. 1 is a kind of RSCT motor drive power supply block diagram that the embodiment of the present invention provides, as shown in Figure 1, RSCT comprises with motor drive power supply 100: power factor correction unit 101, voltage-regulation unit 102, modulation boosting unit 103, demodulation by filter unit 104, inversion reversing unit 105, two phase signals generation units 106 and control unit 107, wherein:
Power factor correction unit 101, for receiving the single-phase alternating current source signal of outside input, carries out power factor correction to described single-phase alternating current source signal, obtains the first direct current signal, and the first described direct current signal is input to voltage-regulation unit.
In embodiments of the present invention, power factor correction unit 101 can be a PFC (Power Factor Correction-power factor correction) rectification module, specifically, can adopt DPF1000 type power factor correction module as input, because DPF1000 power factor correction module only has 1500W, therefore in order to solve the low problem of bringing of power factor, can adopt multiple DPF1000 power factor correction module, such as 4 or 6 DPF1000 power factor correction submodules being connected in parallel.The single-phase alternating current source signal of outside input is converted to two-phase direct current signal by power factor correction unit 101, and carry out power factor correction, finally corrected two-phase direct current signal is input to voltage-regulation unit 102.
Voltage-regulation unit 102, for the frequency setting control signal of reception control unit output, according to described frequency setting control signal, the first described direct current signal is carried out to pressure regulation, obtains the second required direct current signal of load, by the second DC signal output to modulating boosting unit.
In embodiments of the present invention, voltage-regulation unit 102 can be a BUCK (buck DC-DC basic topology) voltage regulating module, the two-phase direct current signal receiving from voltage-regulation unit 102 is carried out to pressure regulation, by controlling inductance, the charging interval of electric capacity is realized to concrete Regulation Control process, and slowly power up, until be added to 1500V, and the frequency setting control signal control inputs and the output that send according to the control unit 107 receiving.
Modulation boosting unit 103, for the Using Sinusoidal Pulse Width Modulation signal of reception control unit output, is converted to the first high pressure low frequency waveform signal according to described drive pulse signal by the second described direct current signal.
In embodiments of the present invention, the Using Sinusoidal Pulse Width Modulation signal that modulation boosting unit 103 reception control units 107 are exported, the DC power signal that voltage-regulation unit 102 is exported is transformed into the sinusoidal signal of high frequency, then passes through high frequency transformer step-up ratio as 5-6 times.
In embodiments of the present invention, Fig. 2 is the block diagram of the modulation boosting unit 103 that provides of the embodiment of the present invention, and as shown in Figure 2, modulation boosting unit 103 can comprise: sinusoidal signal modular converter 201, and boost module 202 and filtration module 203, wherein:
Sinusoidal signal modular converter 201, is converted to high frequency sinusoidal signal for the second direct current signal of voltage-regulation unit 102 being exported according to the Using Sinusoidal Pulse Width Modulation signal of control unit output;
Boost module 202, the high frequency sinusoidal signal that offset of sinusoidal signal conversion module 201 the generates processing of boosting, obtains high-frequency signal;
Filtration module 203, the high-frequency signal that boost module 202 is generated carries out filtering, obtains the first high pressure low frequency waveform signal.
Demodulation by filter unit 104, for the first described high pressure low frequency waveform signal is carried out to filtering, obtains the second high pressure low frequency waveform signal.
In embodiments of the present invention, the high-frequency signal that modulation boosting unit 103 is exported in demodulation by filter unit 104 becomes low frequency signal, output low frequency HT waveform through inner filtering.
Inversion reversing unit 105, for the commutation drive pulse signal of reception control unit output, carries out inverse transformation to processing according to described drive pulse signal to the second described high pressure low frequency waveform signal, obtains Low Frequency Sine Signals.
In embodiments of the present invention, the inversion reversing unit 105 low-frequency high-voltage waveform that demodulating unit 104 is exported that accepts filter, and the commutation drive pulse signal of reception control unit output, will after the commutation of low-frequency high-voltage waveform, obtain Low Frequency Sine Signals according to commutation drive pulse signal.
Two phase signals generation units 106, carry out phase place output for the Low Frequency Sine Signals to described and control processing, obtain two-phase Low Frequency Sine Signals.
In embodiments of the present invention, RSCT can comprise two groups of above-mentioned power factor correction units 101, voltage-regulation unit 102, modulation boosting unit 103, demodulation by filter unit 104 and inversion reversing unit 105 with motor drive power supply 100, every group of unit produces respectively a road Low Frequency Sine Signals, and the phase difference of two-way Low Frequency Sine Signals is 90 degree.
Control unit 107, for according to load current generated frequency setup control signal, Using Sinusoidal Pulse Width Modulation signal and commutation drive pulse signal.
In embodiments of the present invention, control unit 107, according to load current generated frequency setup control signal, is controlled voltage-regulation unit 102 the first direct current signal is carried out to pressure regulation, obtains the second required direct current signal of load; Control unit 107 also generates Using Sinusoidal Pulse Width Modulation signal, controls modulation boosting unit 103 the second direct current signal is converted to the first high pressure low frequency waveform signal; Control unit 107 also generates commutation drive pulse signal, controls inversion reversing unit 105 the second high pressure low frequency waveform signal is carried out to inverse transformation to processing, obtains Low Frequency Sine Signals.
In embodiments of the present invention, control unit 107 is controlled the phase place of every road Low Frequency Sine Signals by controlling the phase place of Sine Modulated waveform of each road modulation boosting unit 103, taking the phase difference that ensures two-way Low Frequency Sine Signals as 90 degree.
RSCT provided by the invention adopts single-phase input with motor drive power supply, therefore can use single-phase alternator that logger car carries to power for motor drive power supply, the low frequency signal that directly output motor driving power can be used, frequency, the affect problem of change in voltage on coring operation success rate of well site generator are solved, solve simultaneously and cannot obtain required power supply for the different area of electrical specification, thereby cannot carry out the problem of coring operation.
RSCT provided by the invention can be contained in 19 cun of standard PC cases of 6U with motor drive power supply, and volume is little, lightweight, convenient in carrying.
RSCT provided by the invention can, according to operating voltage and the frequency of cable length and downhole instrument working condition adjusting motor, not be subject to the impact of generator voltage, frequency with motor drive power supply.In the time of the thicker difficulty in starting of hydraulic oil, can change the Using Sinusoidal Pulse Width Modulation signal that modulation boosting unit receives by control unit, thereby realize frequency reducing, improve the Motor torque of coring, can carry out high moment of torsion variable frequency starting, so that reach the object that the motor of coring is started by long cable cold oil; Can change the Using Sinusoidal Pulse Width Modulation signal that modulation boosting unit receives by control unit simultaneously, improve the output frequency of power supply, improve the motor speed of coring, increase hydraulic pump flow, solved under the condition of high temperature, the thinning hydraulic oil causing of hydraulic oil is revealed the problem of power of motor deficiency.
RSCT provided by the invention has adopted high frequency transformer with motor drive power supply, input and output isolation, and output is single-phase low frequency signal, having overcome in prior art variable frequency power supply input and output does not isolate and finally exports the shortcoming of high frequency three-phase signal, met distinctive input and output insulation request in drilling type sidewall coring process, and the phase difference of output two-phase is the requirement of the low frequency signal of 90 °.
RSCT motor drive power supply provided by the invention, power supply is output as sine wave, drive so can overcome the long cable of existing variable frequency power supply or frequency converter the high frequency attenuation problem producing, also just overcome the shortcoming that general variable frequency power supply or frequency converter need adapted reactor.
Embodiment bis-
The RSCT heavy-duty motor driving power that the embodiment of the present invention proposes, input can be the alternating voltage of 220V/50Hz, is output as the AC power of 90 ° of two groups of phase phasic differences, its global index is as follows:
Input voltage: single-phase AC180V～AC240V 50Hz;
A phase rated power: 3000W;
A phase output voltage: AC 0V～1200V;
A phase rated current: 3A;
B phase rated power: 3000W;
B phase output voltage: AC 0V～1200V;
B phase rated current: 3A;
Output frequency: 0.1HZ～60HZ;
AB phase angle: 90 °.
In electrical characteristic, AB two-phase is identical, below taking any one function of analyzing mutually each module as example.
Figure 3 shows that the RSCT heavy-duty motor driving power structure chart that the embodiment of the present invention provides, as shown in Figure 3, RSCT comprises with heavy-duty motor driving power: A, B phase power factor correction (PFC) module 301 and 311, A, B phase BUCK voltage regulating module 302 and 312, A, B phase high frequency Sine Modulated boost module 303 and 313, A, B phase demodulation by filter module 304 and 314, A, B phase inversion output module 305 and 315, control module 306, wherein
A, B phase power factor correction (PFC) module 301 and 311, be respectively used to receive from outside single-phase electricity input, carry out power factor correction, obtain respectively the direct current signal that voltage is synchronizeed with electric current, respectively this direct current signal is input to A, B phase BUCK voltage regulating module 302 and 312.In embodiments of the present invention, power factor is the ratio of actual power and apparent power, or the angle cosine value of input voltage and input current.For pure resistive load, because voltage is synchronizeed with electric current, angle is 0, therefore cosine value is 1, power factor is 1, and all apparent power are all converted to actual power.In actual applications, especially electric machinery load is inductive load, and in the case of the power limited of powerful application scenario and input power, the low problem of bringing of power factor is particularly outstanding.The design input of this power supply has adopted DPF1000 type power factor correction module, and parameter is as follows:
Input voltage: single-phase AC170V～AC250V;
Rated power: 1500W;
Output voltage: DC360V;
Power factor: 95%;
Because DPF1000 power factor correction module only has 1500W, therefore in order to solve the low problem of bringing of power factor, PFC rectification module is specifically by multiple, Fig. 4 is the PFC topological diagram in parallel that the embodiment of the present invention provides, as shown in Figure 4, can be connected in parallel to realize by 4 or 6 PFC rectification submodules, thereby solve under powered problem.The direct voltage of exporting 360V after interchange input PFC correction module is input to A, B phase BUCK voltage regulating module 302 and 312.
A, B phase BUCK voltage regulating module 302 and 312, receive respectively the control signal of the setpoint frequency that control module 306 sends, recently control respectively the ON time of BUCK voltage regulating module internal switch pipe by the duty of control signal, thereby regulation voltage, distinguishes the required direct current signal of output loading to A, B phase high frequency Sine Modulated boost module 303 and 313.
In embodiments of the present invention, Fig. 5 is the BUCK voltage regulating module schematic diagram that the embodiment of the present invention provides, as shown in Figure 5, A, B phase BUCK voltage regulating module 302 and 312 have completed the function of system regulation voltage, and the direct voltage of the DC360V of A, 301 and 311 outputs of B phase power factor correction (PFC) module is input to A, B phase BUCK voltage regulating module 302 and 312.Control module 306 drives signal to control output voltage by control.Control module 306 is sent the control signal of a certain frequency, drives the duty of signal recently to control the ON time of M1 switching tube by control, thus control inputs voltage by L1 the charging interval to C1, reach the object of regulation voltage.Output voltage range is direct current 0～360V.
A, B phase high frequency Sine Modulated boost module 303 and 313, be connected with control module 306 respectively, receive respectively the driving pulse that control module 306 is sent, according to this driving pulse, the direct current signal receiving is transformed into the sinusoidal signal of high frequency, then by the processing of boosting, obtain high-frequency signal, and become low frequency signal through inner filtering, output high pressure low frequency waveform signal is respectively to A, B phase demodulation by filter circuit 304 and 314.
In embodiments of the present invention, Fig. 6 is the Sine Modulated boost module principle schematic that the embodiment of the present invention provides, and as shown in Figure 6,4 IGBT switching tube M1-M4 connect according to full-bridge mode, then connects successively the high frequency transformer and the current rectifying and wave filtering circuit that boost; The direct current of A, 302 and 312 outputs of B phase BUCK voltage regulating module is input to this module, and control module 306 is sent the driving pulse that two group pulse width change according to the sinusoidal rule of low frequency, and waveform as shown in Figure 7, is controlled M1, M4 and M2, M3 alternate conduction.A in Fig. 6 point place obtains high frequency waveforms as shown in Figure 8 like this.Transformer T1 is the high frequency transformer boosting, and step-up ratio is 1:5, and the point of the B in Fig. 6 obtains high voltagehigh frequency waveform.Through B1 rectification, after L1, C1 filtering, obtain and the high pressure low frequency waveform of driving pulse same frequency, as shown in Figure 9.
A, B phase demodulation by filter module 304 and 314, the high pressure low frequency waveform signal being respectively used to receiving carries out exporting respectively A, the inverse transformation of B phase to module 305 and 315 after demodulation by filter.
A, the inverse transformation of B phase, to module 305 and 315, receive control module 306 and are issued to driving pulse, according to this driving pulse, the high pressure low frequency waveform signal receiving are carried out to inverse transformation to processing, obtain Low Frequency Sine Signals; Respectively the current value of the load collecting is exported to described control module 306.
In embodiments of the present invention, Figure 10 be the inverse transformation that provides of the embodiment of the present invention to module principle schematic diagram, Figure 11 is that the commutation that the embodiment of the present invention provides drives signal and sinusoidal modulation signal graph of a relation.A, B phase high frequency Sine Modulated boost module 303 and 313 is for by A, the DC power signal of B phase BUCK voltage regulating module 302 and 312 outputs is transformed into the sinusoidal signal of high frequency, then boost by high frequency transformer, as 5-6 times, output high-frequency signal, and become low frequency signal through inner filtering, the low-frequency high-voltage Waveform Input of output is to inversion inverting module, low frequency signal as shown in Figure 11, control module 306 is sent two groups of commutation driving pulses of synchronizeing with Sine Modulated control signal, commutation logic pulse as shown in Figure 11, wherein commutation logic pulse A drives the M1 in high pressure inverting module, M4 injectron, commutation logic pulse B drives the M2 in high pressure inverting module, M3 injectron.After the commutation of inversion inverting module, obtain Low Frequency Sine Signals, be illustrated in fig. 12 shown below.
Control module 306, carrys out the phase place of control system output two-phase Low Frequency Sine Signals by controlling the phase place of Sine Modulated waveform of high frequency Sine Modulated boost module 303 and 313 of A, B two-phase.90 ° of A, the phasic differences of B two-phase phase in the present embodiment.The final output waveform of system as shown in figure 13.
In embodiments of the present invention, A, the inverse transformation of B phase also for gathering the current value of load, and export control module 306 to module 305 and 315.Control module 306, also carries out phase place output for the Low Frequency Sine Signals that A, the inverse transformation of B phase are obtained to module 305 and 315 and controls processing, and finally export two-phase Low Frequency Sine Signals; After this two-phase Low Frequency Sine Signals of output, whether the electric current that judges load according to the current value receiving changing value in the given time exceedes predetermined value, if, control described A, B phase BUCK voltage regulating module 302 and 312 processing of boosting, or control described A, B phase high frequency Sine Modulated boost module 303 and 313 carries out down conversion process; Otherwise, determine balance point magnitude of voltage, and export the two-phase Low Frequency Sine Signals with this balance point magnitude of voltage, wherein, when balance point magnitude of voltage correspondence increases or reduces magnitude of voltage, the electric current of load all raises.
RSCT provided by the invention adopts single-phase input with motor drive power supply, therefore can use single-phase alternator that logger car carries to power for motor drive power supply, the low frequency signal that directly output motor driving power can be used, frequency, the affect problem of change in voltage on coring operation success rate of well site generator are solved, solve simultaneously and cannot obtain required power supply for the different area of electrical specification, thereby cannot carry out the problem of coring operation.
RSCT provided by the invention can be contained in 19 cun of standard PC cases of 6U with motor drive power supply, and volume is little, lightweight, convenient in carrying.
RSCT provided by the invention can, according to operating voltage and the frequency of cable length and downhole instrument working condition adjusting motor, not be subject to the impact of generator voltage, frequency with motor drive power supply.In the time of the thicker difficulty in starting of hydraulic oil, can change the Using Sinusoidal Pulse Width Modulation signal that modulation boosting unit receives by control unit, thereby realize frequency reducing, improve the Motor torque of coring, can carry out high moment of torsion variable frequency starting, so that reach the object that the motor of coring is started by long cable cold oil; Can change the Using Sinusoidal Pulse Width Modulation signal that modulation boosting unit receives by control unit simultaneously, improve the output frequency of power supply, improve the motor speed of coring, increase hydraulic pump flow, solved under the condition of high temperature, the thinning hydraulic oil causing of hydraulic oil is revealed the problem of power of motor deficiency.
RSCT provided by the invention has adopted high frequency transformer with motor drive power supply, input and output isolation, and output is single-phase low frequency signal, having overcome in prior art variable frequency power supply input and output does not isolate and finally exports the shortcoming of high frequency three-phase signal, meet distinctive input and output insulation request in drilling type sidewall coring process, and the requirement of output single-phase low frequency signal.
RSCT motor drive power supply provided by the invention, at motor, from starting to running again to getting each operating state of core, output voltage and frequency are to regulate in real time according to the electric current of the load of motor.In actual job, due to a variety of causes, the load variations of motor and difference are very large, and the load variations of motor can reach 5-6 doubly from underloading to the most heavily loaded variation.Because the present invention can, according to load current regulation output voltage and frequency, therefore can adapt to the complex working condition of coring apparatus device motor, the power of avoiding motor in prior art to need is very large, and power supply is unable to supply, and makes power supply load excessive and burn power supply; And the power of avoiding motor to need is not very large, and power supply output is excessive, thereby the loss of cable or the copper loss of motor winding are strengthened, and makes the shortcoming such as cable or motor damage.Having overcome in prior art output voltage and frequency in variable frequency power supply is to immobilize, the problem that can not regulate in real time according to the electric current of motor.
RSCT motor drive power supply provided by the invention, power supply is output as sine wave, drive so can overcome the long cable of existing variable frequency power supply or frequency converter the high frequency attenuation problem producing, also just overcome the shortcoming that general variable frequency power supply or frequency converter need adapted reactor.
Embodiment tri-
Figure 14 shows that the motor drive power supply use location schematic diagram for RSCT that the embodiment of the present invention provides, as shown in figure 14, logging system 1400 comprises car body 1401, driving power 1402 and logger 1403, wherein, driving power 1402 can be the driving power of the RSCT motor in embodiment mono-and embodiment bis-, does not repeat them here.
RSCT provided by the invention adopts single-phase input with motor drive power supply, therefore can use single-phase alternator that logger car carries to power for motor drive power supply, the low frequency signal that directly output motor driving power can be used, frequency, the affect problem of change in voltage on coring operation success rate of well site generator are solved, solve simultaneously and cannot obtain required power supply for the different area of electrical specification, thereby cannot carry out the problem of coring operation.
RSCT provided by the invention can be contained in 19 cun of standard PC cases of 6U with motor drive power supply, and volume is little, lightweight, convenient in carrying.
RSCT provided by the invention can, according to operating voltage and the frequency of cable length and downhole instrument working condition adjusting motor, not be subject to the impact of generator voltage, frequency with motor drive power supply.In the time of the thicker difficulty in starting of hydraulic oil, can change the Using Sinusoidal Pulse Width Modulation signal that modulation boosting unit receives by control unit, thereby realize frequency reducing, improve the Motor torque of coring, can carry out high moment of torsion variable frequency starting, so that reach the object that the motor of coring is started by long cable cold oil; Can change the Using Sinusoidal Pulse Width Modulation signal that modulation boosting unit receives by control unit simultaneously, improve the output frequency of power supply, improve the motor speed of coring, increase hydraulic pump flow, solved under the condition of high temperature, the thinning hydraulic oil causing of hydraulic oil is revealed the problem of power of motor deficiency.
RSCT provided by the invention has adopted high frequency transformer with motor drive power supply, input and output isolation, and output is single-phase low frequency signal, having overcome in prior art variable frequency power supply input and output does not isolate and finally exports the shortcoming of high frequency three-phase signal, meet distinctive input and output insulation request in drilling type sidewall coring process, and the requirement of output single-phase low frequency signal.
RSCT motor drive power supply provided by the invention, at motor, from starting to running again to getting each operating state of core, output voltage and frequency are to regulate in real time according to the electric current of the load of motor.In actual job, due to a variety of causes, the load variations of motor and difference are very large, and the load variations of motor can reach 5-6 doubly from underloading to the most heavily loaded variation.Because the present invention can, according to load current regulation output voltage and frequency, therefore can adapt to the complex working condition of coring apparatus device motor, the power of avoiding motor in prior art to need is very large, and power supply is unable to supply, and makes power supply load excessive and burn power supply; And the power of avoiding motor to need is not very large, and power supply output is excessive, thereby the loss of cable or the copper loss of motor winding are strengthened, and makes the shortcoming such as cable or motor damage.Having overcome in prior art output voltage and frequency in variable frequency power supply is to immobilize, the problem that can not regulate in real time according to the electric current of motor.
RSCT motor drive power supply provided by the invention, power supply is output as sine wave, drive so can overcome the long cable of existing variable frequency power supply or frequency converter the high frequency attenuation problem producing, also just overcome the shortcoming that general variable frequency power supply or frequency converter need adapted reactor.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection range being not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the driving power of a RSCT motor, it is characterized in that, the driving power of described RSCT motor comprises power factor correction unit, voltage-regulation unit, modulation boosting unit, demodulation by filter unit, inversion reversing unit, two phase signals generation unit and control units;
Power factor correction unit, for receiving the single-phase alternating current source signal of outside input, carries out power factor correction to described single-phase alternating current source signal, obtains the first direct current signal, and the first described direct current signal is input to voltage-regulation unit;
Voltage-regulation unit, for the frequency setting control signal of reception control unit output, according to described frequency setting control signal, the first described direct current signal is carried out to pressure regulation, obtains the second required direct current signal of load, by the second DC signal output to modulating boosting unit;
Modulation boosting unit, for the Using Sinusoidal Pulse Width Modulation signal of reception control unit output, is converted to the first high pressure low frequency waveform signal according to described drive pulse signal by the second described direct current signal;
Demodulation by filter unit, for the first described high pressure low frequency waveform signal is carried out to filtering, obtains the second high pressure low frequency waveform signal;
Inversion reversing unit, for the commutation drive pulse signal of reception control unit output, carries out inverse transformation to processing according to described drive pulse signal to the second described high pressure low frequency waveform signal, obtains Low Frequency Sine Signals; Gather the current value of load, and export described control unit to;
Two phase signals generation units, carry out phase place output for the Low Frequency Sine Signals to described and control processing, obtain two-phase Low Frequency Sine Signals;
Control unit, for according to load current generated frequency setup control signal, Using Sinusoidal Pulse Width Modulation signal and commutation drive pulse signal;
Wherein, whether the electric current that described control unit judges load according to the current value receiving changing value in the given time exceedes predetermined value, if so, control the processing of boosting of described voltage-regulation unit, or control described modulation boosting unit and carry out down conversion process; Otherwise, determine balance point magnitude of voltage, two phase signals generation units outputs have the two-phase Low Frequency Sine Signals of this balance point magnitude of voltage, and wherein, described balance point magnitude of voltage is the correspondence magnitude of voltage that the electric current of load all raises when increasing or reducing magnitude of voltage.
2. the driving power of RSCT motor according to claim 1, is characterized in that, described modulation boosting unit comprises:
Sinusoidal signal modular converter, for being converted to high frequency sinusoidal signal according to described Using Sinusoidal Pulse Width Modulation signal by the second described direct current signal;
Boost module, to the processing of boosting of described high frequency sinusoidal signal, obtains high-frequency signal;
Filtration module, carries out filtering to described high-frequency signal, obtains the first high pressure low frequency waveform signal.
3. the driving power of RSCT motor according to claim 2, is characterized in that, described sinusoidal signal modular converter comprises 4 IGBT switching tubes that connect according to full-bridge mode;
Described boost module is a high frequency transformer;
Described filtration module is a current rectifying and wave filtering circuit.
4. the driving power of RSCT motor according to claim 3, it is characterized in that, described control unit sends Using Sinusoidal Pulse Width Modulation signal to described modulation boosting unit, control the IGBT switching tube alternate conduction in described modulation boosting unit, obtain described high frequency sinusoidal signal;
Described high frequency transformer boosts to described high frequency sinusoidal signal, obtains described high-frequency signal;
Described current rectifying and wave filtering circuit carries out after rectifying and wave-filtering described high-frequency signal, obtains the first described high pressure low frequency waveform signal with described Using Sinusoidal Pulse Width Modulation signal same low frequency frequency.
5. the driving power of RSCT motor according to claim 1, it is characterized in that, the driving power of described RSCT motor comprises two groups of power factor correction units, voltage-regulation unit, modulation boosting unit, demodulation by filter unit and inversion reversing unit, power factor correction unit described in every group, voltage-regulation unit, modulation boosting unit, demodulation by filter unit, inversion reversing unit generate respectively a road Low Frequency Sine Signals, and the phase difference of two Low Frequency Sine Signals is 90 degree.
6. the driving power of RSCT motor according to claim 1, it is characterized in that, control unit is controlled the phase place of every road Low Frequency Sine Signals by adjusting Using Sinusoidal Pulse Width Modulation signal, the phase difference that makes two-way Low Frequency Sine Signals is 90 degree.
7. the driving power of RSCT motor according to claim 1, it is characterized in that, described control unit sends the commutation drive pulse signal of synchronizeing with Using Sinusoidal Pulse Width Modulation signal to described inversion reversing unit, drive the injectron in described inversion reversing unit, after commutation, obtain described Low Frequency Sine Signals.
8. the driving power of RSCT motor according to claim 1, is characterized in that, described power factor correction unit is composed in parallel by 4 or 6 circuit of power factor correction.
9. the driving power of RSCT motor according to claim 1, is characterized in that, described driving power is arranged on logger car.
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| CN104373120B (en) * | 2014-11-28 | 2017-01-25 | 中国石油天然气集团公司 | Control system and control method of logging drilling sidewall coring tool |
| CN106494230A (en) * | 2015-09-06 | 2017-03-15 | 钟建华 | Car electricity drives portable anti-skidding pendulum corer |
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| CN101702581A (en) * | 2009-12-09 | 2010-05-05 | 杨戴核 | Home-use 2000w constant voltage and constant frequency regulator |
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| CN101702581A (en) * | 2009-12-09 | 2010-05-05 | 杨戴核 | Home-use 2000w constant voltage and constant frequency regulator |
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