CN103312250A - Voltage regulating device and method for alternating-current generator - Google Patents
Voltage regulating device and method for alternating-current generator Download PDFInfo
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- CN103312250A CN103312250A CN2013102866216A CN201310286621A CN103312250A CN 103312250 A CN103312250 A CN 103312250A CN 2013102866216 A CN2013102866216 A CN 2013102866216A CN 201310286621 A CN201310286621 A CN 201310286621A CN 103312250 A CN103312250 A CN 103312250A
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Abstract
The invention relates to a voltage regulating device for an alternating-current generator. The voltage regulating device comprises a digital voltage regulator and the alternating-current generator, wherein the digital voltage regulator is connected with the alternating-current generator and comprises a pulse width modulation (PWM) signal isolation circuit, an automatic exciting circuit and an insulated gate bipolar translator (IGBT) power amplifying tube, a filtering circuit is in parallel connection with the automatic exciting circuit, the IGBT power amplifying tube and a switching power supply respectively, and a microprocessor is connected with a voltage fine-tuning port and a voltage difference-regulating port. The invention also relates to a voltage regulating method for the alternating-current generator. The method comprises a voltage control mode and an automatic exciting method. The voltage regulating device is suitable for generators of various different power inputs and different power and has the advantages of being high in response speed, high in control precision, good in excitation performance, high in anti-jamming capability, small in size, safe to use, convenient to operate, high in regulating precision, wide in coverage and stable in output voltage.
Description
Technical field
The present invention relates to alternating current machine voltage control technical field, be particularly useful for a kind of automatically brushless, brush alternating current generator regulator and method arranged.
Background technology
The power generation unit is as a kind of electric supply be widely used factory, mine, market, hospital, mansion, field work, steamer etc., the power generation unit is (being electric ball) generating take engine as power band engine alternator, is kinetic transformation a kind of equipment of electric energy.Voltage regulator arrangement is the pith of generator, and it has key effect to guaranteeing power supply quality.
At present, domestic alternating current generator matching used voltage regulator all use the control mode of simulation to realize, it adopts the average voltage value detection method, namely detect the peak-to-peak value of alternating voltage waveform, when the voltage waveform distorted, peak-to-peak value voltage is curve and the voltage waveform area effective voltage value of reflecting voltage wave form varies truly.So it is inaccurate that the simulation voltage regulator can detect, cause generator output voltage control inaccurate; In addition its excitation poor performance, exist temperature to float phenomenon, it requires the shortcomings such as high, inconvenient debugging, defencive function are few to circuit technology; In addition, along with the development of science and technology, (such as LED lamp, USP power supply, frequency conversion equipment etc.) appear in a large amount of nonlinear loads, and the control method of simulation more is difficult to satisfy load alternator output voltage is required stably requirement.And have producer to develop the voltage controller of the mixed type of simulation+numeral abroad, its performance is better than the voltage regulator of domestic production analog form relatively in the steady state load situation, but simulation control part plays fast reaction when generator impact off-load, so it is inaccurate still can voltage detecting to occur when wave distortion is serious, its technology control is complicated, expensive in addition, volume large, excitation mode must be that it encourages the mode generator, and working power needs to power with permanent magnet generator.
Such as foreign patent publication number CN 102150357 A, denomination of invention is for regulating inspiring methods and the device of alternating current generator, and a kind of hybrid voltage is regulated the voltage of three phase places of the alternating current of controlling the alternating current generator generation.Digital Voltage Regulator produces the mean value of RMS voltage for each phase place, and produces error according to voltage and the frequency ratio of alternating current.The order of RMS average voltage is made amendment.The voltage commands that is modified is processed by the aanalogvoltage adjuster that alternator output voltage is carried out rectification, then this output voltage is used to revise voltage commands within a period of time, to produce the regulation voltage order, this regulation voltage order has determined to be used to the current level of excitation alternating current generator.Reduced like this excitation energy performance of this voltage regulator, and control rate is general, interference free performance is not strong.
Summary of the invention
The present invention provides a kind of fast response time, precise control, control structure simple in order to address the above problem, the excitation performance is good, antijamming capability is strong alternating current generator regulator and method.
In order to address the above problem, the technical solution used in the present invention is: a kind of alternating current generator regulator, comprise Digital Voltage Regulator and alternating current generator, described Digital Voltage Regulator is connected with alternating current generator, described alternating current generator comprises excitation mechanism and stator coil, described excitation mechanism also comprises magnet exciting coil, armature coil, rectification circuit and main magnet exciting coil, described Digital Voltage Regulator also comprises Switching Power Supply, microprocessor, filter circuit and over-current detection circuit, described microprocessor is connected with again USB port, the CAN bus, display window and keyboard input, described Digital Voltage Regulator also comprises the pwm signal buffer circuit, automatically exciting circuit and IGBT power amplifier tube, described filter circuit is parallel-connected to respectively the automatically exciting circuit, IGBT power amplifier tube and Switching Power Supply, described microprocessor also are connected with the fine setting port and transfer poor port.The poor port of described accent can allow the mutual inductance of user's external impressed current can easily realize idle automatic distribution function, realizes that two or more parallel running of generators regulates and be incorporated into the power networks; Described pressure regulation port can carry out vernier control to alternator output voltage by the mode that software arranges outside connected switch amount and potentiometer (adjustable resistance); Described USB port can be used for and PC communication (PC refers to PC), use arrange software by PC set alternating current generator output voltage, frequency inflection point, low frequency gradient, start that pressure limiting, pressure rising time, overvoltage protection, overexcitation current protection, transient state overexcitation electric current, voltage are sagging, electric current CT no-load voltage ratio, pid value, start liquid crystal display screen show LOGO change etc., make things convenient for the user scene according to the actual requirements parameter to be made amendment, also make things convenient for the autonomous brand LOGO information of OEM vendor's change; To be user's external connection module can realize that by this port long-range communication reads the output voltage of parameter or control alternating current generator to described CAN bus.
In order to obtain the output voltage amount of generator, described microprocessor is connected with voltage isolation change-over circuit, and described voltage isolation change-over circuit is connected with the three-phase alternating current output voltage by electric power connection line.Described voltage isolation change-over circuit by the step-down of large resistance resistance and operational amplifier, so that the high voltage of microprocessor and alternating current generator output quite is in isolation, guarantees to control the safety of components and parts with the three-phase voltage phase place.
In order effectively to guarantee the unfailing performance of microprocessor, described microprocessor is connected to the pwm signal buffer circuit, described pwm signal buffer circuit is connected to amplifying circuit, and described amplifying circuit is linked the IGBT power amplifier tube, like this so that low-voltage control signal and controlled high-voltage signal isolate fully.
For the processing speed that improves microprocessor and calculate accurately data, described microprocessor adopts the high-speed microprocessor of high precision analogue conversion, described microprocessor is digital three phase voltage, frequency data with three-phase alternating voltage, frequency analog signal conversion, and accurately calculate the real-time real effective of three-phase voltage by software mode, the real-time real effective of described three-phase voltage is reflecting voltage waveform area effective voltage value truly, calculate every required electrical quantity in conjunction with digital PID again, and finish each parameter is processed and controlled.And microprocessor in-built solid state store tools, can store related data.This kind store tools can normally preserved user data under the powering-off state suddenly, again after the power supply, automatically recovers original setup parameter.
In order automatically to set up a stable excitation power supply, described automatically exciting circuit comprises power amplification circuit and voltage stabilizing circuit, and described automatically exciting circuit can be in the situation that the low required startup power supply of Digital Voltage Regulator of setting up of alternating current generator remanent magnetism voltage pole.Simultaneously, satisfy the use of polytype alternating current generator.
To rectifier power supply, described filter circuit is connected with rectifier for conveniently, and described rectifier arrives stator coil by electric power connection line.
A kind of alternating current generator pressure regulation method comprises voltage control mode and automatically exciting method, and its step is as follows:
A. compare product and produce the digital voltage error amount by the mean value of the real-time real effective of detection three-phase alternating voltage and the digital voltage order of setting, the digital voltage error amount produces digital voltage adjustment order by mathematical algorithm and Digital PID Algorithm; Described digital voltage adjustment order is quantified as the pulse width modulation (PWM) signal and controls the field supply of the excitation mechanism of alternating current generator by pwm signal buffer circuit and IGBT power amplifier tube, and the output AC voltage of alternating current generator is in response to the size of field supply;
B. by automatically exciting circuit and IGBT power amplifier tube Parallel Control alternating current generator exciting current, when alternator voltage begins to build pressure, by the power amplification circuit of automatically exciting circuit to alternating current generator magnet exciting coil input current;
C. behind preliminary Voltage Establishment, voltage stabilizing circuit by the automatically exciting circuit carries out pressure limiting control, Switching Power Supply provides required working power to microprocessor, microprocessor is started working, digital voltage adjustment order control IGBT power amplifier tube, the output voltage of alternating current generator will rise to specified voltage; When the output voltage (being the supply voltage that stator coil provides to Digital Voltage Regulator) of alternating current generator surpassed the voltage stabilizing circuit limit value, the automatically exciting circuit was deactivated;
Described digital voltage order derives from the desired voltage values of setting, the signal of fine setting port input, the signal of transferring poor port to input; Described desired voltage values is by the keyboard entry method input or adopts the USB port communication modes by software input gained is set; Described fine setting port input signal changes one of them signal of digital voltage order, by microprocessor A/D port, converts the d. c. voltage signal of fine setting port input or pulse signal to digital signal and changes the digital voltage order; The signal of the poor port input of described accent changes one of them signal of digital voltage order, by microprocessor A/D port, converts the ac current signal of finely tuning the port input to digital signal and changes the digital voltage order.
Carry out the parameter setting in order to further facilitate Digital Voltage Regulator, described employing USB port communication modes can carry out system parameter setting to Digital Voltage Regulator by software is set, and the USB port of utilizing the PC main frame provides the working power of 5V to Digital Voltage Regulator, be Digital Voltage Regulator not having in harness the time, also can read and setup parameter it with PC.
Of the present invention producing effect is: adopt the high-speed microprocessor of high precision analogue conversion as core devices; algorithm by alternating current generator three-phase voltage phase-detection being adopted real-time real effective, the Digital Voltage Regulator that designs in conjunction with digital pid algorithm mode; it is fit to the generator of multiple different electrical power input and different capacity, and is provided with the functions such as the warning of generator overvoltage, magnet exciting coil overcurrent, detection line open circuit protection.Simultaneously, have that precise control, fast response time, excitation performance are good, antijamming capability strong, use is safe, easy to operate, degree of regulation is high and output voltage stabilization.
Description of drawings
Fig. 1 is the circuit connection diagram of alternating current generator regulator of the present invention;
Fig. 2 is the circuit diagram of automatically exciting circuit of the present invention;
Fig. 3 is the structural representation of microprocessor of the present invention;
Fig. 4 is the real voltage oscillogram of alternating current generator loading of the present invention or off-load.
Fig. 5 is the structural representation of whole device of the present invention.
Among the figure: the 1-Digital Voltage Regulator, 101-voltage isolation change-over circuit, the 102-display window, the 103-PWM signal isolation circuit, the 104-amplifying circuit, the 105-IGBT power amplifier tube, the 106-over-current detection circuit, 107-automatically exciting circuit, the 1071-power amplification circuit, the 1072-voltage stabilizing circuit, the 108-Switching Power Supply, the 109-filter circuit, the 110-rectifier, the 111-microprocessor, 1111-three-phase voltage phase place real effective digital voltage detector, 1112-proportion integration differentiation (PID) control figure circuit, the input of 112-keyboard, the 113-USB port, the 114-CAN bus, 115-finely tunes port, 116-transfers poor port, the 2-alternating current generator, the 21-excitation mechanism, the 211-rotor main shaft, the 212-magnet exciting coil, the 213-rotor, the 214-armature coil, the 215-rectification circuit, 216-master's magnet exciting coil, the 22-stator coil, the 3-electric power connection line, А В С-three-phase alternating current output voltage, the 4-generator.
Embodiment
Below in conjunction with accompanying drawing alternating current generator regulator of the present invention is described in further detail:
Shown in Fig. 1,2,3,4,5: a kind of alternating current generator regulator of the present invention, comprise Digital Voltage Regulator 1 and alternating current generator 2, described Digital Voltage Regulator 1 is connected with alternating current generator 2, described alternating current generator 2 comprises excitation mechanism 21 and stator coil 22, described excitation mechanism 21 also comprises magnet exciting coil 212, armature coil 214, rectification circuit 215 and main magnet exciting coil 216, and described Digital Voltage Regulator 1 comprises Switching Power Supply 108, microprocessor 111, filter circuit 109 and over-current detection circuit 106.Described filter circuit 109 is connected with rectifier 110, and rectifier 110 passes through the wherein centre tap of two-phase of electric power connection line 3 connecting stator coils 22.In order to obtain the output voltage amount of alternating current generator 2, described microprocessor 111 is connected with voltage isolation change-over circuit 101, and described voltage isolation change-over circuit 101 is connected with three-phase alternating current output voltage А В С by electric power connection line 3.And voltage isolation change-over circuit 101 with three-phase voltage by the step-down of large resistance resistance and operational amplifier so that the high voltage of microprocessor 111 and alternating current generator 2 outputs quite is in isolation, thereby also guarantee to control the safety of components and parts.And microprocessor 111 is connected to pwm signal buffer circuit 103, simultaneously, pwm signal buffer circuit 103 is connected to amplifying circuit 104, and amplifying circuit 104 is linked IGBT power amplifier tube 105, so that low-voltage control signal and controlled high-voltage signal are isolated fully, improve microprocessor 111 reliabilities like this.What described microprocessor 111 adopted is the high-speed microprocessor of high precision analogue conversion, described microprocessor is digital three phase voltage, frequency data with three-phase alternating voltage phase place, frequency analog signal conversion, and accurately calculate the real-time real effective of three-phase voltage by software mode, calculate every required electrical quantity in conjunction with digital PID, and finish each parameter is processed and controlled.Simultaneously, microprocessor 111 is connected with again USB port 113, CAN bus 114, display window 102 and keyboard input 112.Described Digital Voltage Regulator 1 also comprises pwm signal buffer circuit 103, automatically exciting circuit 107 and IGBT power amplifier tube 105, simultaneously, filter circuit 109 is parallel-connected to respectively automatically exciting circuit 107, IGBT power amplifier tube 105 and Switching Power Supply 108.Described automatically exciting circuit 107 comprises power amplification circuit 1071 and voltage stabilizing circuit 1072, and simultaneously, automatically exciting circuit 107 is in the situation that the low required startup power supply of Digital Voltage Regulator 1 of setting up of alternating current generator 2 remanent magnetism voltage poles.Simultaneously, satisfy the use of polytype alternating current generator 2.Described microprocessor 111 also is connected with fine setting port one 15 and transfers poor port one 16.The poor port one 16 of described accent can allow the mutual inductance of user's external impressed current can easily realize idle automatic distribution function, realizes that two or more parallel running of generators regulates and be incorporated into the power networks; Described pressure regulation port 115 can carry out vernier control to alternating current generator 2 output voltages by the mode that software arranges outside connected switch amount and potentiometer (adjustable resistance); Described USB port 113 can be used for and PC communication (PC refers to PC), use arrange software by PC set alternating current generator 2 outputs voltage, frequency inflection point, low frequency gradient, start that pressure limiting, pressure rising time, overvoltage protection, overexcitation current protection, transient state overexcitation electric current, voltage are sagging, electric current CT no-load voltage ratio, pid value, boot LOGO change etc., make things convenient for the user scene according to the actual requirements parameter to be made amendment, also make things convenient for the autonomous brand LOGO information of OEM vendor's change; To be user's external connection modules can realize that by this port long-range communication reads or control the output parameter of alternating current generator 2 to described CAN bus 114.
A kind of alternating current generator pressure regulation method comprises voltage control mode and automatically exciting method, and its step is as follows:
A. compare product and produce the digital voltage error amount by the mean value of the real-time real effective of detection three-phase alternating voltage and the digital voltage order of setting, the digital voltage error amount produces digital voltage adjustment order by mathematical algorithm and Digital PID Algorithm; Described digital voltage adjustment order is quantified as the pulse width modulation (PWM) signal and controls the field supply of the excitation mechanism 21 of alternating current generator 2 by pwm signal buffer circuit 103 and IGBT power amplifier tube 105, and the output AC voltage of alternating current generator 2 is in response to the size of field supply;
B. by automatically exciting circuit 107 electric current with IGBT power amplifier tube 105 Parallel Control alternating current generators 2 magnet exciting coils 212, begin to build when pressing at alternating current generator 2 voltages, by automatically exciting circuit 107 to alternating current generator 2 magnet exciting coils 212 input currents;
C. behind preliminary Voltage Establishment, voltage stabilizing circuit 1072 by automatically exciting circuit 107 carries out pressure limiting control, Switching Power Supply 108 provides required working power to microprocessor 111, microprocessor 111 is started working, digital voltage adjustment order control IGBT power amplifier tube 105, the output voltage of alternating current generator 2 will rise to specified voltage; When the output voltage (being the supply voltage that stator pitch of the laps 22 provides to Digital Voltage Regulator 1) of alternating current generator 2 surpassed the voltage stabilizing circuit limit value, automatically exciting circuit 107 was deactivated;
In order to make things convenient for Digital Voltage Regulator 1 to carry out the parameter setting, described voltage adjustment order derives from the desired voltage values of setting, the signal of fine setting port one 15 inputs, the signal of transferring poor port one 16 to input; Described desired voltage values is to input 112 modes by keyboard to input or adopt USB port 113 communication modes by software input gained is set; Described fine setting port one 15 input signals change one of them signal of digital voltage order, by microprocessor 111A/D port, convert the d. c. voltage signal of fine setting port one 15 input or pulse signal to digital signal and change the digital voltage order; The current signal of the poor port one 16 input generator outputs of described accent changes one of them signal of digital voltage order, by microprocessor 111A/D port, convert the ac current signal of finely tuning port one 15 inputs to digital signal and change the digital voltage order.
Carry out the parameter setting in order to further facilitate Digital Voltage Regulator 1, described employing USB port 113 communication modes can carry out system parameter setting to Digital Voltage Regulator 1 by software is set, and the USB port of utilizing the PC main frame provides the working power of 5V to Digital Voltage Regulator 1, be Digital Voltage Regulator 1 not having in harness the time, also can read and setup parameter it with PC.
When engine 4 rotor drivens 213 main shafts 211 rotate, the remanent magnetism voltage that produces in alternating current generator 2 outputs is divided into three the tunnel behind the wave circuit 109 after filtration through becoming DC power supply behind the rectification circuit 215, the first via is transferred to Switching Power Supply 108, the second tunnel and is transferred to IGBT power amplifier tube 105, because the remanent magnetism voltage pole is low, switching power circuit 108 can't start, microprocessor 111 can not enter firstization, therefore, IGBT power amplifier tube 105 is in off state, and it temporarily can not provide electric current to the magnet exciting coil 212 of excitation mechanism 21.Simultaneously, Third Road sends automatically exciting circuit 107 to.At this moment, Q6 is conducting state, Q6 emitter electricity approximates its collector voltage (differing about 0.7V) Q6 collector electrode and R5, R6, R7 links to each other, the voltage pole of Q6 collector electrode is low, voltage stabilizing Z1 is in anti-pressure limiting state, Q7 is in off state, the collector electrode of Q7 produce one with the Q6 emitter with equipotential trigger voltage VSS, trigger voltage VSS is connected to the Q2 base stage, be about 0.7V as long as the Q2 base voltage falls above the triggering pilot of each transistor of 2.1V() time, large power triode Q4 conducting, then the direct current of remanent magnetism voltage generation flows into the magnet exciting coil 212 of excitation mechanism 21, alternating current generator 2 output end voltages are namely along with increase, and the direct voltage behind the rectifier 110 is also along with increase; When direct voltage increases to the 24V left and right sides, voltage-stabiliser tube Z1 starts working, the Q7 conducting, the VSS trigger voltage is drawn and is zero potential, Q2, Q3, Q4 is turned off, magnet exciting coil 212 electric currents that then flow in the alternating current generator 2 are turned off, alternating current generator 2 output voltages begin to reduce, direct voltage behind the rectifier 110 is also along with reduction, when dropping to when being lower than 24V, voltage stabilizing Z1 is in again anti-pressure limiting state, Q6 is in not only off state VSS voltage and raises but also begin to trigger Q2, Q3, the conducting of Q4 triode, so periodic duty, i.e. alternating current generator 2 outputs can be controlled in a stable magnitude of voltage, and this stable magnitude of voltage is worked with exciting switch power supply 108 through rectifier 110 and filter circuit 109 metapedes.Switching Power Supply 108 excites successfully will provide the system works power supply to Digital Voltage Regulator 1 afterwards, and microprocessor 1 will enter initialization; After initialization is finished, proportion integration differentiation (PID) control figure circuit 1112 carries out PID computing and control output pwm signal, behind pwm signal process pwm signal buffer circuit 103 and the amplifying circuit 104, drive IGBT power amplifier tube 105, simultaneously, IGBT power amplifier tube 105 is started working, and controls it to magnet exciting coil 212 inflow currents of excitation mechanism 21, simultaneously, the output end voltage of alternating current generator 2 will be along with being increased to desired voltage values.R2 and voltage-stabiliser tube Z4 are serially connected, the base stage of R3 and triode Q5 links together, the base stage of the emitter of Q5 and triode Q6 link together with line R4 connect direct voltage negative pole (), when DC voltage rising arrives 47V, voltage-stabiliser tube Z2 starts working, the Q5 conducting, Q6 turn-offs, voltage stabilizing circuit 1072 and large power triode Q4 are turned off, the magnetic field intensity of the excitation mechanism 21 of alternating current generator 2 is controlled IGBT power amplifier tube 105 by microprocessor 111 and is realized, simultaneously, the effect of R5 resistance is to prevent that voltage stabilizing circuit is turned off rear trigger voltage VSS suspension and triggers Q2, Q3, Q4 work.
As shown in Figure 4: its voltage waveform and nonideal sine wave behind alternating current generator 2 bringing onto loads, wave distortion can appear in loading or off-load, especially the wave distortion meeting is more obvious when nonlinear load adds off-load, wave distortion all may occur at any time, and add, its cycle also can be given birth to Instantaneous Phase during off-load variation.
Claims (9)
1. alternating current generator regulator, comprise Digital Voltage Regulator and alternating current generator, described Digital Voltage Regulator is connected with alternating current generator, described alternating current generator comprises excitation mechanism and stator coil, described excitation mechanism also comprises magnet exciting coil, armature coil, rectification circuit and main magnet exciting coil, described Digital Voltage Regulator comprises Switching Power Supply, microprocessor, filter circuit and over-current detection circuit, described microprocessor is connected with again USB port, the CAN bus, display window and keyboard input, it is characterized in that: described Digital Voltage Regulator also comprises the pwm signal buffer circuit, automatically exciting circuit and IGBT power amplifier tube, described filter circuit is parallel-connected to respectively the automatically exciting circuit, IGBT power amplifier tube and Switching Power Supply, described microprocessor also are connected with the fine setting port and transfer poor port.
2. alternating current generator regulator according to claim 1 is characterized in that: described microprocessor is connected with voltage isolation change-over circuit, and described voltage isolation change-over circuit is connected with the three-phase alternating current output voltage by electric power connection line.
3. alternating current generator regulator according to claim 1, it is characterized in that: described microprocessor is connected to the pwm signal buffer circuit, and described pwm signal buffer circuit is connected to amplifying circuit, and described amplifying circuit is linked the IGBT power amplifier tube.
4. according to claim 1,2 or 3 described alternating current generator regulators, it is characterized in that: described microprocessor adopts the high-speed microprocessor of high precision analogue conversion, described microprocessor is digital three phase voltage, frequency data with three-phase alternating voltage, frequency analog signal conversion, and accurately calculate the real-time real effective of three-phase voltage by software mode, calculate every required electrical quantity in conjunction with digital PID again, and finish each parameter is processed and controlled.
5. alternating current generator regulator according to claim 1, it is characterized in that: described automatically exciting circuit comprises power amplification circuit and voltage stabilizing circuit, and described automatically exciting circuit can be in the situation that the low required startup power supply of Digital Voltage Regulator of setting up of alternating current generator remanent magnetism voltage pole.
6. alternating current generator regulator according to claim 1, it is characterized in that: described filter circuit is connected with rectifier, described rectifier by electric power connection line to stator coil.
7. an alternating current generator pressure regulation method comprises voltage control mode and automatically exciting method, and its step is as follows:
A. compare product and produce the digital voltage error amount by the mean value of the real-time real effective of detection three-phase alternating voltage and the digital voltage order of setting, the digital voltage error amount produces digital voltage adjustment order by mathematical algorithm and Digital PID Algorithm; Described digital voltage adjustment order is quantified as the pulse width modulation (PWM) signal and controls the field supply of the excitation mechanism of alternating current generator by pwm signal buffer circuit and IGBT power amplifier tube, and the output AC voltage of alternating current generator is in response to the size of field supply;
B. by automatically exciting circuit and IGBT power amplifier tube Parallel Control alternating current generator exciting current, when alternator voltage begins to build pressure, by the power amplification circuit of automatically exciting circuit to alternating current generator magnet exciting coil input current;
C. behind preliminary Voltage Establishment, voltage stabilizing circuit by the automatically exciting circuit carries out pressure limiting control, Switching Power Supply provides required working power to microprocessor, microprocessor is started working, digital voltage adjustment order control IGBT power amplifier tube, the output voltage of alternating current generator will rise to specified voltage; When the output voltage (being the supply voltage that stator coil provides to Digital Voltage Regulator) of alternating current generator surpassed the voltage stabilizing circuit limit value, the automatically exciting circuit was deactivated.
8. alternating current generator pressure regulation method according to claim 7 is characterized in that: described digital voltage order derive from desired voltage values, the input of fine setting port of setting signal, transfer the signal of poor port input; Described desired voltage values is by the keyboard entry method input or adopts the USB port communication modes by software input gained is set; Described fine setting port input signal changes one of them signal of digital voltage order, by microprocessor A/D port, converts the d. c. voltage signal of fine setting port input or pulse signal to digital signal and changes the digital voltage order; The signal of the poor port input of described accent changes one of them signal of digital voltage order, by microprocessor A/D port, converts the ac current signal of finely tuning the port input to digital signal and changes the digital voltage order.
9. alternating current generator pressure regulation method according to claim 8, it is characterized in that: described employing USB port communication modes can carry out system parameter setting to Digital Voltage Regulator by software is set, and the USB port of utilizing the PC main frame provides the working power of 5V to Digital Voltage Regulator, be Digital Voltage Regulator not having in harness the time, also can read and setup parameter it with PC.
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