CN207939424U - A kind of single-phase permanent magnet synchronous generator serial capacitors operating control device - Google Patents
A kind of single-phase permanent magnet synchronous generator serial capacitors operating control device Download PDFInfo
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- CN207939424U CN207939424U CN201820204525.0U CN201820204525U CN207939424U CN 207939424 U CN207939424 U CN 207939424U CN 201820204525 U CN201820204525 U CN 201820204525U CN 207939424 U CN207939424 U CN 207939424U
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Abstract
The utility model is related to a kind of single-phase permanent magnet synchronous generator serial capacitors operating control devices, including two orthogonal windings and load, capacitor C1, C2, the C3 being connected with orthogonal winding described in one of them, bidirectional thyristor T1, T2, T3 for control capacitor access circuit for being connected corresponding with described capacitor C1, C2, C3；Further include voltage-current detecting modulate circuit, A/D conversion circuits, single chip machine controlling circuit, IGBT group control circuit, zero cross detection circuit, Hall voltage sensor, Hall current sensor, linear optocoupler, phase inverter.A kind of technical solution of single-phase permanent magnet synchronous generator serial capacitors operating control device described in the utility model, can overcome monophase machine that generator is caused to shake because generating pulsating mmf and when voltage waveform distortion is serious, two-phase armature winding is powered generates the defects of magnetomotive force of ovality difference causes generator vibrations and generating efficiency low.
Description
Technical field
The utility model is related to motor control technology fields, and in particular to a kind of single-phase permanent magnet synchronous generator serial capacitors fortune
Row control device.
Background technology
Mobile power or fire-fighting, emergency management and rescue, military mobile generator to be used are needed when field work, are largely used small
Type single-phase generator is that equipment is powered, and current development trend is that capacity constantly increases.Existing electrical excitation single-phase generator, capacity
Greatly, performance is good, but electro-magnetic motor needs electrical excitation mechanism, increases facility load, and inefficient.It compares, rotor
Body can not only be substantially reduced using permanent magnet material, mitigate quality, moreover it is possible to remove complicated electrical excitation mechanism, more eliminate and encourage
Magnetic loss, meanwhile, the use of permanent-magnet material can also increase air gap flux density, improve electric efficiency, therefore middle low power is single-phase
Magneto alternator is more and more applied.
But substantially there is major defect in the synchronous generator of traditional single phase stator winding.Generator unit stator it is single-phase
It is pulsating mmf that winding, which flows through the armature reaction MMF generated when single-phase alternating current, which can be decomposed into
The negative phase-sequence magnetomotive force of the positive sequence magnetomotive force and reverse rotation that rotate in the forward direction, the speed of related movement of wherein negative sequence field and rotor are
Twice of synchronous speed can generate the electromotive force and electric current of twice of fundamental frequency alternation on rotor field coil or iron core, to make to turn
Son generates the magnetic field of pulsating, and the magnetic field of rotor pulsating generates a series of odd harmonic electromotive force and electric current, makes in the stator windings
Generator loading output voltage sinusoidal waveform is distorted.Moreover, the meeting of negative phase-sequence air-gap rotating magnetic field and the rotor magnetic rotated in the forward direction
Field interactions generates the alternating electromagnetism torque of twice of fundamental frequency, so that motor is generated vibration and noise, or even influence the peace of generator
Full steady operation；In addition negative sequence field can also generate additional iron losses on rotor, be electrical excitation structure if it is rotor, can also be
The alternating current of twice of fundamental frequency is generated in Exciting Windings for Transverse Differential Protection, to which generation adds copper loss of rotor, so that the temperature of generator is risen and is increased and imitate
Rate declines.
Single-phase electric excitation generator can reduce negative phase-sequence armature reaction MMF by installing Damper Winding on rotor
Influence, therefore the power of single-phase electric excitation generator can be to two megawatts or so.And single phase permanent-magnet generator is in order to ensure
Voltage is more stable when having lower voltage regulation factor, i.e. bringing onto load, and rotor is typically designed to Surface Mount magnetic steel structure, rotor magnetic pole table
Face does not have space to install Damper Winding.Even rotor uses embedded magnetic steel structure, because damping conducting bar fever can cause forever
Magnet magnetic property declines, and the output voltage of generator is made to further decrease.Single-phase permanent magnet synchronous generator will improve capacity, and
Vibration and noise when operation do not influence stable operation and the output performance of generator, it is necessary to find suitable mode and solve to bear
The magnetomotive influence of sequence.Currently, there is following five kinds of methods to be widely used to weaken the magnetomotive influence of negative phase-sequence：
1, using rational skewed stator slot and stator sine windings or 120 degree of facies tract bilayer short distance windings；
2, amplification air gap appropriate, while reducing the ratio of notch and air gap；
3, change rotor windings parameter, using heavy damping winding (full cage, half cage, 1/4 cage Damper Winding)；
4, the electrical excitation single phase synchronous generator of brushless excitation is carried out using converse field；
5, it is in parallel outside again after one in the stator of permanent magnet generator two phase space mutual deviations, 90 degree of windings is in series capacitance
Output single-phase voltage.
Using after sine windings skewed slot technology in measure 1, odd harmonic component is by sine windings in generator output potential
It eliminates, and slot ripples can be pruned by skewed slot so that last EMF waveform deriation ratio reduces, and is greatly improved.But it is negative
Sequence armature reaction MMF does not weaken motor oscillating and influence of noise fundamentally.
Suitably amplify air gap in measure 2, to increase air-gap reluctance, the size of negative sequence field flux density can be reduced.Meanwhile it putting
The ratio that big air gap can also reduce notch air gap weakens the slot ripples of air gap flux density to weaken slot effect, is conducive to change
The EMF waveform of kind armature winding, but gas length changes surplus and is limited by motor size, and effect is limited, and makes motor
Power density declines.
Damping slot is opened up in 3rd kind of method, and the harmful effect that negative sequence field is generated is reduced to using heavy damping by minimum journey
Degree, heavy damping measure are to have used for reference short-circuit transformer to weaken negative phase-sequence magnetic by the magnetomotive force that vice-side winding coil current generates in fact
The method of field enables the resistance in Damper Winding be much smaller than reactance, so that electric current in winding is fallen behind nearly 90 degree of its electromotive force, to generate
The damping magnetomotive force almost opposite with negative phase-sequence magnetomotive force is offset the magnetomotive influence of negative phase-sequence, is reduced using Damper Winding
Irregularity of wave form is one of most efficient method.But the electric current in Damper Winding can make rotor heating serious, influence generator
Efficiency.
The operation principle of 4th kind of method be using single phase synchronous generator backward armature reacting field rotor q axis around
The frequency multiplication electric current induced in group is encouraged oneself after rotating rectifier rectification for d axis windings.The advantages of excitation mode is excitation wire
Road is simple, and excitation is rapid, and self-excitation ability is strong, and good voltage waveform when load can compensate defeated caused by the variation of load automatically
Go out voltage change, steady state voltage regulation is 3~5%.The disadvantage is that the capacity of capacitor is big, substantially passed by every kilowatt of 15 microfarads
Increase, so when capacity motor is larger, capacitor volume is larger.In addition generator voltage variation is close with rotation speed relation, therefore right
The stability bandwidth and speed change rate of the rotating speed of prime mover are more demanding.
For the 5th kind of measure of single phase permanent-magnet generator, it is in series capacitance the one of 90 degree of windings of space mutual deviation in two-phase
Then parallel running, keeps the current amplitude of two phase windings equal or close to equal, and biphase current differs 90 degree or close to differing 90
Degree can realize that round or ellipse magnetic field is run, wholly or largely weaken influence of the negative sequence field to generator, not only
The limitation that single phase permanent-magnet generator output power has because negative sequence field causes vibration can be broken through, output power is improved, and
The power density of motor can also be improved.But the invention does not provide the selection of specific capacitance and seals in the controlling party of capacitance
Method.
First four kinds of above several technical solutions are practical for electrical excitation single phase synchronous generator, but for single-phase
Permanent magnet generator can install Damper Winding on rotor core and weaken negative sequence field if rotor uses embedded structure, but
The permanent-magnet material magnetic property decline even demagnetization on rotor can be made by being the fever of Damper Winding, to make generator performance decline.
In addition for the magneto of embedded rotor structure, due to saliency, output voltage is bigger with load variation, i.e. voltage
Regulation is bigger, influences voltage stabilization, or even is unable to supply certain equipment to voltage-sensitive.But it is surface magnetic for rotor
The above-mentioned technology of single-phase permanent magnet synchronous generator of steel construction is difficult to realize, because rotor is fitted without Damper Winding in structure
Position.Therefore the single-phase permanent magnet synchronous generator output power of surface magnetic steel structure can reach 10 kilowatts or so at present, power
Continue the normal work that mechanical oscillation and its noise after increasing have seriously affected generator.
Utility model content
One main purpose of the utility model is to overcome at least one defect in the prior art, provide a kind of single-phase
Magneto alternator serial capacitors operating control device can effectively overcome the monophase machine present in the prior art because generating arteries and veins
Magnetomotive force of shaking and cause generator to shake and when voltage waveform distortion is serious, two-phase armature winding is powered generates ovality difference
Generator is caused to shake for magnetomotive force and generating efficiency is low, the load that changes in a certain range and the reason required under power factor
The defects of different from the nominal capacitance that actual market supplies by optimum series capacitance.
In order to realize that above-mentioned technical proposal, the utility model use following technical scheme：
One side according to the present utility model provides a kind of single-phase permanent magnet synchronous generator serial capacitors operation control dress
It sets, including：Two orthogonal windings and load, capacitor C1, C2, the C3 being connected with orthogonal winding described in one of them are and described
Capacitor C1, C2, C3 correspond to bidirectional thyristor T1, T2, the T3 for controlling capacitor access circuit being connected；
Further include：Voltage, electric current and the voltage-current detecting tune for filtering off harmonic wave in circuit for detecting Acquisition Circuit
Circuit is managed, for the analog signal of voltage-current detecting modulate circuit acquisition to be converted into the A/D conversion circuits of digital signal,
For receive digital signal and exported outward according to checking result control signal single chip machine controlling circuit, for receiving microcontroller
The output signal of control circuit and the IGBT group control circuit that thyristor is controlled, the IGBT group control electricity
Road is equipped with the zero cross detection circuit for detecting thyristor both end voltage zero passage；In the voltage-current detecting modulate circuit
Portion is equipped with Hall voltage sensor, Hall current sensor for obtaining voltage and current signal from main circuit, for electricity to be isolated
Road and the linear optocoupler for accessing A/D conversion circuits, and the phase inverter for accessing microcontroller external interrupt port；It is described
IGBT group control circuit is internally provided with capacitor C1, C2, C3, bidirectional thyristor T1, T2, T3, Hall voltage sensor with
And linear optocoupler.
An embodiment according to the present utility model, the A/D conversion circuits use AD7656 chips.
An embodiment according to the present utility model, the single chip machine controlling circuit are internally provided with capacitance C4, C5, C6, electricity
Hinder R1, R2, crystal oscillator X1 and single chip computer AT X89C51.
An embodiment according to the present utility model, the IGBT group control circuit is to bidirectional thyristor T1, T2, T3
Using operating passing zero.
An embodiment according to the present utility model, the output of the ports the P1.2 access AD7656 of the ATX89C51
The BUSY of the ports the P1.3 access AD7656 of DOUTA, the ATX89C51, the ports the P1.4~P2.6 access of the ATX89C51
The output signal of linear optocoupler in IGBT group control circuit, the ports the P2.1 output control signal of the ATX89C51
The ports P2.2~P2.4 output control signal to the CONVSTA of AD7656, the ATX89C51 controls IGBT group.
Other side according to the present utility model provides a kind of based on the operation control of single-phase permanent magnet synchronous generator serial capacitors
Method processed, at least includes the following steps：
S1, voltage-current detecting modulate circuit detection main circuit voltage, electric current simultaneously convert thereof into control circuit and can connect
Small voltage, the low current of receipts, and input A/D conversion circuits；
S2, A/D conversion circuit convert the continuous analog signal received to digital signal, and are inputted from output port
Microcontroller；
S3, microcontroller receive the transformed voltage of A/D conversion circuits, current signal, and to power-factor angle and power into
Row calculates, and the capacitance of institute's switching is checked in by capacitance enquiry form, while controlling zero cross detection circuit detection thyristor both end voltage；
S4, when thyristor both end voltage zero passage, microcontroller controls thyristor by IGBT group control circuit
System realizes the operating passing zero to capacitor C1, C2, C3.
An embodiment according to the present utility model realizes capacitor group under varying load by the way of thuristor throw-in and throw-off
The variation of combination is adjusted, and the analysis and solution process for calculating real work capacitance is：
It is the positive sequence rotated in the forward direction and the negative-sequence current of reverse rotation by two-phase armature winding Current Decomposition, defines positive sequence magnetic
The ratio of kinetic potential and the magnetomotive modulus value of negative phase-sequence, the i.e. ratio of forward-order current and negative-sequence current, as judgment criteria, ovality；
Taking makes the capacitance of ovality minimum be the ideal optimal capacitance under specific load and power factor command；Take several
Load and its optimal capacitance are represented, is grouped；Come with optimal capacitance in each group and real work capacitive differential quadratic sum size
Weigh the matching degree of each group of selected capacitor combination value and remaining capacitance in the grouping；Quadratic sum minimum is required
Real work capacitance.
As shown from the above technical solution, the utility model has at least one of following advantages and good effect：
A kind of single-phase permanent magnet synchronous generator serial capacitors operating control device provided by the utility model uses microcontroller
The mode of control, when single-phase generator can be made to access different loads, it is dynamic to eliminate negative phase-sequence magnetic to access suitable capacitance
Gesture；By two phase winding output single-phase resultant currents, the capacity of single-phase generator can be promoted, at the same increased control system and
Winding volume is little, is not also impacted to the work of single-phase generator；By the way of serial capacitors, two-phase synthesis electric current can be made
The magnetomotive force of generation is subcircular magnetomotive force, vibration caused by negative phase-sequence magnetomotive force when existing single-phase generator is run, not only
Energy consumption is will produce, the shaft of motor can also be damaged, therefore eliminates negative phase-sequence magnetomotive force, the service life of motor can be increased, also
The efficiency of motor can be improved.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, for ordinary skill people
For member, without creative efforts, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of one embodiment of single-phase permanent magnet synchronous generator serial capacitors operating control device described in the utility model
Structural schematic diagram；
Fig. 2 is the utility model voltage-current detecting modulate circuit structural schematic diagram；
Fig. 3 is the utility model A/D converting circuit structure schematic diagrames；
Fig. 4 is the utility model single chip machine controlling circuit structural schematic diagram；
Fig. 5 is the utility model IGBT group control circuit and zero cross detection circuit structural schematic diagram；
Fig. 6 tables look-up for the utility model microcontroller controls the program flow diagram of capacitor switching.
The reference numerals are as follows：
1- Hall voltage sensors；2- Hall current sensors；3- linear optocouplers；4- phase inverters.
Specific implementation mode
In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.Term
The orientation or state relation of the instructions such as "inner", "upper", "lower" are orientation based on ... shown in the drawings or state relation, merely to just
In description the utility model and simplify description, specific side must be had by not indicating or implying the indicated device or element
Position, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, it can also be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention is understood as the case may be.
It should be noted that term " first " in the specification and claims of the utility model and above-mentioned attached drawing,
" second " etc. is for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that in this way
The data used can be interchanged in the appropriate case, so as to the embodiments of the present invention described herein.
Below in conjunction with the accompanying drawings and specific implementation mode is described in further detail the utility model.
Referring to Fig. 1~6, Fig. 1 is a kind of single-phase permanent magnet synchronous generator serial capacitors operation control dress described in the utility model
The structural schematic diagram of an embodiment is set, Fig. 2 is the utility model voltage-current detecting modulate circuit structural schematic diagram, Fig. 3
For the utility model A/D converting circuit structure schematic diagrames, Fig. 4 is the utility model single chip machine controlling circuit structural schematic diagram, Fig. 5
For the utility model IGBT group control circuit and zero cross detection circuit structural schematic diagram, Fig. 6 is the utility model microcontroller
It tables look-up and controls the program flow diagram of capacitor switching.
A kind of single-phase permanent magnet synchronous generator serial capacitors operating control device described in the utility model, including：Two orthogonal
Winding and load, capacitor C1, C2, C3 being connected with orthogonal winding described in one of them, with described capacitor C1, C2, C3 couple
What should be connected accesses bidirectional thyristor T1, T2, T3 of circuit for controlling capacitor, further includes：For detecting Acquisition Circuit
Voltage, electric current and the voltage-current detecting modulate circuit for filtering off harmonic wave in circuit, for voltage-current detecting to be improved electricity
The analog signal of road acquisition is converted into the A/D conversion circuits of digital signal, for receive digital signal and according to checking result to
The single chip machine controlling circuit of outer output control signal, output signal for receiving single chip machine controlling circuit and to bidirectional thyristor
The IGBT group control circuit controlled, the IGBT group control circuit are equipped with for detecting bidirectional thyristor two
The zero cross detection circuit of terminal voltage zero passage；The voltage-current detecting modulate circuit is internally provided with for obtaining electricity from main circuit
The Hall voltage sensor 1 of current voltage signal, Hall current sensor 2 for isolation circuit and access the lines of A/D conversion circuits
Property photo-coupler 3, and the phase inverter 4 for accessing microcontroller external interrupt port；It is set inside IGBT group control circuit
There are capacitor C1, C2, C3, bidirectional thyristor T1, T2, T3, Hall voltage sensor 1 and linear optocoupler 3.
In the utility model, the A/D conversion circuits use AD7656 chips, single chip machine controlling circuit to be internally provided with electricity
Hold C4, C5, C6, resistance R1, R2, crystal oscillator X1 and single chip computer AT X89C51.The IGBT group control circuit pair
Bidirectional thyristor T1, T2, T3 use operating passing zero.The output DOUTA of the ports the P1.2 access AD7656 of the ATX89C51,
The ports the P1.4~P2.6 access IGBT group control of the BUSY of the ports the P1.3 access AD7656 of ATX89C51, ATX89C51
The output signal of linear optocoupler 3 in circuit, the ports P2.1 of ATX89C51 output a control signal to the CONVST of AD7656
The ports the P2.2~P2.4 output control signal of A, ATX89C51 control IGBT group.
Single-phase permanent magnet synchronous generator serial capacitors progress control method is based on using the utility model one kind, to single-phase permanent
Synchronous generator serial capacitors operating control device is controlled, and following steps are specifically included：
S1, voltage-current detecting modulate circuit detection main circuit voltage, electric current simultaneously convert thereof into control circuit and can connect
Small voltage, the low current of receipts, and input A/D conversion circuits；
S2, the A/D conversion circuits convert the continuous analog signal received to digital signal, and from output port
Input microcontroller；
S3, microcontroller receive the transformed voltage of A/D conversion circuits, current signal, and to power-factor angle and power into
Row calculates, and the capacitance of institute's switching is checked in by capacitance enquiry form, while controlling zero cross detection circuit detection thyristor both end voltage；
S4, when thyristor both end voltage zero passage, microcontroller controls thyristor by IGBT group control circuit
System realizes the operating passing zero to capacitor C1, C2, C3.It is in parallel using three true capacitor groups in the utility model, with suitable
Theoretical optimal capacitance value requirement corresponding under different loads is answered, and by the way of quick "on off" of thyristor, realizes and become negative
The variation for carrying lower capacitor group combination is adjusted.Theory analysis process is as follows：
(1) build mathematical model, solve power, power factor and series capacitance size mapping relations, armature-reaction
Magnetomotive force is generated by armature supply, and armature supply can equally be decomposed into positive sequence and negative-sequence current.The electricity of winding A is obtained by device
Stream, the electric current of winding B can be calculated in the case of fixed capacity device value.
Biphase current is respectively：Biphase current is separately disassembled into forward-order current and negative phase-sequence electricity
Stream：
+ 90 ° of β=α；
The ratio of positive sequence magnetomotive force and the magnetomotive modulus value of negative phase-sequence, the i.e. ratio of forward-order current and negative-sequence current are defined, is made
For judgment criteria, ovality：
Only being taken in the present invention makes the capacitance of ovality minimum be the best electricity of ideal under specific load and power factor command
Hold.Available, the determination relationship of different loads and optimal capacitance is programmed using MATLAB.
(2) it chooses 7*6 and represents load, mainstream load and power factor and its corresponding 42 optimal capacitance values.By this
A little data are by capacitance being ranked sequentially and be organized into table from small to large.
(3) grouping matching and calculating optimal capacitance value.Assuming that three real work capacitances (being set as C1, C2, C3), three electricity
The input of appearance and achievable seven capacitor combinations are cut out, if being ordered as from small to large：C1, C2, C3, C1+C2, C1+C3, C2+C3,
C1+C2+C3.It is now that 42 theories are most preferably electric in order to allow seven capacitor combination values to be preferably fitted 42 theoretical optimal capacitance values
Capacitance is divided into 7 groups.The seven capacitances combination that mutually there is linear restriction relationship is allowed to substitute seven electricity waited in grouping successively
Capacitance, and the grouping found out in current default obtains three optimal real work capacitance C1 of whole matching effect,
C2, C3.
(4) in order to whether weigh its corresponding capacitor combination value in the case of known group of interior element number and specific data
Properly, each group of selected capacitance group is weighed using optimal capacitance in each group and real work capacitive differential quadratic sum size
The matching degree of conjunction value and six capacitances in the grouping.42 optimal capacitance values are taken to constitute one-dimensional matrix Bc, take national nominal
Capacitance constitutes one-dimensional Matrix C.Three capacitance C are taken from C1i, C2i, C3i, it is classified as i-th kind of situation, obtains 7 of three capacitances
Parallel combination value C1i, C2i, C3i, C1i+C2i, C1i+C3i, C2i+C3i, C1i+C2i+C3i。
In the optimal capacitance and seven capacitances of 42 operating points the difference of immediate value and Si：
Numerical computations are carried out using matlab programming softwares, find minimum Si, capacitance at this time is the three of selection
A capacitance.
By the optimal capacitance value under different capacity, power factor operating mode there are in tables of data after off-line calculation is good, in case real
Border is tabled look-up uses when controlling, and saving is in the line computation time.
Theory analysis and parameter calculate：Take electromotive force En=240V, voltage Un=230V, the self-impedance Z of machine winding1=
10+0.005j Ω, power take 0kw~15kw.Three capacitances that program calculation obtains selection are respectively 146pF, 182pF,
209pF。
Using nominal capacitance：100pF, 47pF are in parallel, and 100pF, 82pF are in parallel, and 150pF, 62pF are in parallel.
This table is inputted in microcontroller, the capacitance enquiry form of inquiry when switching capacitance.
A, B two-phase armature winding of single-phase generator 4 pole, 24 slot are further weakened humorous using the double-deck short distance Distributed Winding
Influence of the wave magnetic field to induced electromotive force.A, two phase windings of B spatially differ 90 ° of electrical angles.
In load both ends access Hall voltage sensor 1 and Hall current sensor in voltage-current detecting modulate circuit
2, detection main circuit voltage, electric current simultaneously convert thereof into the receivable small voltage of control circuit, low current, using linear optical coupling
Clutch 3 is isolated.Linear optocoupler 3 exports the branch of external interrupt port one that a branch inputs microcontroller by phase inverter 4
Road inputs modulus conversion chip.
Select core of the AD7656 modulus conversion chips as the analog-to-digital conversion part of single-phase generator serial capacitors control circuit
The heart.By V1, the ports V2 input simultaneously for voltage, current signal, by the ports DOUTA Serial output after conversion.Chip will be originally continuous
Analog signal be converted into the digital signal of highest 16.Voltage that modulus conversion chip is exported from output port, current digital
Signal inputs microcontroller.
Select ATX89C51 microcontrollers as the master controller of thuristor throw-in and throw-off in single chip machine controlling circuit.On P1 winding displacements
The input terminal of port P1.2, P1.3 as signal is each responsible for receiving voltage, current signal and the analog-to-digital conversion after analog-to-digital conversion
The run signal of chip.The voltage signal of P1.4~P1.6 interface thyristors carries out zero passage detection, and the safety for capacitance is thrown
It cuts.The external control port INT0 of microcontroller and the ports INT1 connect the phase inverter 4 in load detecting circuit, input load voltage,
The zero cross signal of electric current, for calculating power-factor angle.Output ends of the port P2.0 and P2.1 as signal on P2 winding displacements, it is defeated
Go out the operation that signal controls chip to modulus conversion chip.P2.2~P2.4 outputs are turned on or off signal to IGBT group control
Circuit processed.Delay procedure is added in SCM program, be delayed switching, avoids the unstable frequent switching of circuit.Microcontroller and modulus
Conversion chip uses the clock signal that the same crystal oscillator generates.
The signal of the ports input microcontroller P2.2~P2.4 in IGBT group control circuit, control bidirectional thyristor T1,
T2, T3 switching.Hall voltage mutual inductor 1 detects thyristor both end voltage, by linear optocoupler 3 and phase inverter 4 by zero passage
Signal inputs microcontroller, controls operating passing zero.Bidirectional thyristor T1, T2, T3 are 147pF, 182pF, 212pF by three sizes
Capacitor group C1, C2, C3 be connected with winding A constitute circuit.
In conclusion a kind of single-phase permanent magnet synchronous generator serial capacitors operating control device provided by the utility model and
Control method uses monolithic processor controlled mode, and when single-phase generator can be made to access different loads, it is suitable to access
Capacitance eliminates negative phase-sequence magnetomotive force；By two phase winding output single-phase resultant currents, the capacity of single-phase generator can be promoted, together
When increased control system and winding volume it is little, also the work of single-phase generator is not impacted；Using series capacitance
Mode, it is subcircular magnetomotive force, negative phase-sequence magnetic when existing single-phase generator is run that can make the magnetomotive force that two-phase synthesis electric current generates
Vibration, not only will produce energy consumption, can also be damaged to the shaft of motor caused by kinetic potential, therefore eliminate negative phase-sequence magnetomotive force,
The service life of motor can be increased, moreover it is possible to improve the efficiency of motor.
It should be appreciated that the utility model is not limited in its application to the detailed construction and arrangement of component proposed in this paper
Mode.The utility model can have other embodiment, and can realize and execute in many ways.Aforesaid deformation form
It is fallen in the scope of the utility model with modification.It should be appreciated that the utility model disclosed and defined herein extends
It is mentioned to text and/or drawings or all alternative combinations of two or more apparent independent features.It is described herein
Embodiment illustrate to become known for realize the best mode of the utility model, and those skilled in the art will be enable to utilize
The utility model.
Claims (5)
1. a kind of single-phase permanent magnet synchronous generator serial capacitors operating control device, which is characterized in that including：
Two orthogonal windings and load, capacitor C1, C2, C3 being connected with orthogonal winding described in one of them, with the capacitance
Device C1, C2, C3 correspond to bidirectional thyristor T1, T2, the T3 for controlling capacitor access circuit being connected；
Further include：Voltage, electric current and the voltage-current detecting conditioning electricity for filtering off harmonic wave in circuit for detecting Acquisition Circuit
Road is used for for the analog signal of voltage-current detecting modulate circuit acquisition to be converted into the A/D conversion circuits of digital signal
It receives digital signal and exports the single chip machine controlling circuit of control signal outward according to checking result, for receiving microcontroller control
The output signal of circuit and the IGBT group control circuit that thyristor is controlled, in the IGBT group control circuit
Equipped with the zero cross detection circuit for detecting thyristor both end voltage zero passage；It is set inside the voltage-current detecting modulate circuit
It is useful for obtaining Hall voltage sensor, the Hall current sensor of voltage and current signal from main circuit, simultaneously for isolation circuit
Access the linear optocoupler of A/D conversion circuits, and the phase inverter for accessing microcontroller external interrupt port；The crystalline substance lock
Pipe trigger control circuit is internally provided with capacitor C1, C2, C3, bidirectional thyristor T1, T2, T3, Hall voltage sensor and line
Property photo-coupler.
2. a kind of single-phase permanent magnet synchronous generator serial capacitors operating control device according to claim 1, which is characterized in that
The A/D conversion circuits use AD7656 chips.
3. a kind of single-phase permanent magnet synchronous generator serial capacitors operating control device according to claim 1, which is characterized in that
The single chip machine controlling circuit is internally provided with capacitance C4, C5, C6, resistance R1, R2, crystal oscillator X1 and microcontroller
ATX89C51。
4. a kind of single-phase permanent magnet synchronous generator serial capacitors operating control device according to claim 1, which is characterized in that
The IGBT group control circuit uses operating passing zero to bidirectional thyristor T1, T2, T3.
5. a kind of single-phase permanent magnet synchronous generator serial capacitors operating control device according to claim 3, which is characterized in that
AD7656 is accessed in the ports P1.3 of the output DOUTA, the ATX89C51 of the ports the P1.2 access AD7656 of the ATX89C51
BUSY, the ATX89C51 the ports P1.4~P2.6 access IGBT group control circuit in linear optocoupler output
Signal, the ports P2.1 of the ATX89C51 output a control signal to the CONVSTA of AD7656, and the P2.2 of the ATX89C51~
The ports P2.4 output control signal controls IGBT group.
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