CN1065364A - Hybrid frequency-changing speed governer - Google Patents
Hybrid frequency-changing speed governer Download PDFInfo
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- CN1065364A CN1065364A CN 91101742 CN91101742A CN1065364A CN 1065364 A CN1065364 A CN 1065364A CN 91101742 CN91101742 CN 91101742 CN 91101742 A CN91101742 A CN 91101742A CN 1065364 A CN1065364 A CN 1065364A
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Abstract
The present invention is a kind of hybrid frequency-changing speed governer of being made up of rectifier power source and mixing inverter, it mixes inverter and is made up of electronic commutation bridge (200), unsteady flow (300), detection control unit (400), drive unit (500) etc., the inversion process is to bear the load current commutation by the electronic commutation bridge, the sub-rotation transformation phase place of machinery unsteady flow, the sliding contact conduction current is to the load output AC.This device can suppress harmonic wave, improves the motor runnability, can be used for frequency conversion and speed regulation of AC motor.
Description
The present invention relates to a kind of hybrid frequency-changing speed governer, belong to electric power unsteady flow field.
Frequency conversion and speed regulation of AC motor generally is divided into pole changing, becomes slip regulating speed, three kinds of modes of frequency control.Wherein frequency control is a kind of desirable advanced person's a mode of speed regulation, and popular both at home and abroad at present RHVC is as introducing Mitsubishi FREQOL-F2 series, the converter plant that the TOSUERT-130G of Toshiba series and China develop voluntarily etc. is state type all-electronin RHVC, the main circuit of its inverter needs six groups of large power, electrically sub-elements to form, constitute three-phase six arm static switches, break-make by the sequential control static switch that triggers distributor realizes three-phase inversion, because all-electronin three-phase inverter large power, electrically sub-element consumption is many, the circuit complexity, device volume is big, the cost height, fault frequency random distribution, the maintenance intuitive is poor, capacity with the frequency conversion device increases, element connection in series-parallel quantity increases, and shortcoming is more outstanding, applies to be subjected to price and technical restriction.
It is simple to the purpose of this invention is to provide a kind of circuit, low cost, the hybrid frequency-changing speed governer that is used for alternating current motor of function admirable.
This hybrid frequency-changing speed governer, be by rectifier power source (100), compositions such as inverter, it is characterized in that inverter is to mix inverter, be by electronic commutation bridge (200), unsteady flow (300), commutation bridge control unit (400), drive unit (500) is formed, the output of electronic commutation bridge (200) electrically connects for contacting with unsteady flow (300) of a rotation, the rotating part of commutation bridge control unit (400) is signal patch (401), servomotor (501) in signal patch (401) and unsteady flow (300) and the drive unit is contained on the same axle, the stationary part of commutation bridge control unit (400) is made up of detecting element (402) and gate pole control circuit (403), signal patch (401) is corresponding to the angle position of unsteady flow (300), element (402) and gate pole control circuit after testing, in the control electronic commutation bridge (200) controlled rectification element alternately " leading to ", " break " and make the load current commutation, through the sliding contact conduction current of unsteady flow, realize direct current is become the alternating current of required frequency again.
By rectifier power source (100), electronic commutation bridge (200), unsteady flow (300), commutation bridge control unit (400), the hybrid frequency-changing speed governer that drive unit (500) is formed, its unsteady flow is by collector ring (301,302,303), unsteady flow ring (307,308,309,310), input brush (304,305,306) and output brush (312,313,314) form, in the input brush, what connect positive potential is positive brush (304), what connect negative potential is negative brush (306), connect the brush (305) that commutates that is of alternation current potential, in collector ring, introduce just being called of positive potential and encircle (301) by just brushing, introduce negative encircle (303) of being called of negative potential by negative brush, be called commutative ring (302) by what commutation brush was introduced the alternation current potential, collector ring (301,302,303) encircle for the whole garden of conduction, the unsteady flow ring is divided into the conducting strip of 4 or 4 multiple along garden week by design, and it is positive (307) in proper order, commutator segment (308), negative film (309), commutator segment (310) cycle arrangement.Positive, commutator segment, less insulation gap is arranged between the negative film, positive (307) with just encircle (301) and electrically connect, negative film (309) electrically connects with negative ring (303), commutator segment (308,310) electrically connect with commutative ring (302), collector ring (301,302,303) and unsteady flow ring (307,308,309,310) can rotate around X-axis, input, the relative X-axis of output brush is static, input brush (304,305,306) with collector ring (301,302,303) between, output brush (312,313,314) with unsteady flow ring (307,308,309,310) electrically contact for sliding between.
The signal patch (401) of commutation bridge control unit is a garden dish or garden tube, presses required number of phases signalization band for 360 ° at garden dish or tube upper edge, garden.
Another principal character of the present invention is that the signal band on the used signal patch of hybrid frequency-changing speed governer can be by the setting that needs that suppresses harmonic wave, it is designing requirement output line voltage Fu Shi series expansion, and set the humorous wave amplitude minimum value of required inhibition, obtain the line voltage waveform, superpose out behind the phase voltage waveform, calculate each phase current potential Ua(t), Ub(t), Uc(t), by Ua(t)+Ub(t)+Uc(t) obtain Q point current potential Uq(t), the lightproof area on the signal band is at 360 ° of garden Zhou Shangyu Uq(t) correspondence.
Operation has bigger influence to the output waveform of RHVC to motor, and too high humorous wave amplitude can worsen motor properties.Hybrid frequency-changing speed governer is guaranteeing under the preceding topic of more satisfactory economy the harmonic component in the output waveform effectively to be suppressed, and is greatly improved than the performance of the RHVC of six-step wave, can widen the Application of frequency control of motor speed field.
Not only to have born timesharing be that threephase load commutates but also timesharing is that the modulation of bipolarity break-make is implemented in threephase load to the electronic commutation bridge in this device inversion process, the line voltage waveform that makes threephase load cuts into some recesses by the special angle of each harmonic, to reach inhibition to comparatively significant 5,7,11 subharmonic of motor runnability influence, make the switch frequency of electronic commutation bridge less again, reduce switching loss.
The present invention has the following advantages:
1. electronic still commutation no-spark and the simple and reliable characteristics of Mechanical Contact conduction have been utilized, having overcome direct current machine class mechanical commutator is subjected to commutation capacity to restrict the restriction of the upper limit of manufacturing capacity, make and mix the inversion principle, the auxiliary theory of commutation of electronics may extend in other close field to be used.
2. simplify circuit, reduced cost, be beneficial to popularization.The present invention and all-electronin three-phase inverter are relatively, the power electronic element consumption of main circuit has reduced 2/3rds, control circuit also obtains its corresponding simplified, compare with the equal capacity full electronic of 150KVA three-phase inverter, inverter section cost of the present invention reduces by 60～65%, constitute the RHVC cost and reduce by 45～55%, help the extensive use of ac variable speed technology at industrial circle.
3. reduced the random distribution of fault, strengthened reliability, because circuit of the present invention is simple, the consumption that has reduced power electronic element widely can significantly reduce because of the failure rate of the random distribution that electronic component parameter deterioration causes; Brush class device can guarantee the reliability service of equipment with the easy maintenance of prediction.
4. realize that multiple abbreviation is just economical, the power superposition of applicable vast capacity.
5. also can adapt to the requirement of some heterogeneous special machines, can make multi-phase AC motor obtain the similar speed adjusting performance of direct current machine.
6. realized that the harmonic wave selection suppresses, can suppress the harmonic wave below 11 times effectively, improved the runnability of motor.
Embodiments of the invention are respectively schemed referring to following:
Fig. 1 is a functional-block diagram of the present invention;
Fig. 2 is a schematic diagram of the present invention;
Fig. 3 is the sub-electrical symbol figure of unsteady flow, also is the sub-turntable type arrangement figure of unsteady flow;
Fig. 4 is the axial arranged principle assumption diagram of unsteady flow of the present invention;
Fig. 5 is an equivalent circuit diagram of the present invention;
Fig. 6 a～f is an inversion process dynamic schematic diagram;
Fig. 7 is a signal patch;
The load voltage waveform figure of Fig. 8 when press Fig. 7 the 1. the control of bars passage commutates bridge, signalling channel differs 60 °;
Fig. 9 be in the signal patch signalling channel by as the signal load voltage oscillogram of Fig. 7 the when 3. the control of bar passage commutates bridge.
Corresponding electronic commutation bridge break-make modulation switch angle schematic diagram when Figure 10 threephase load brush moves on commutator segment.
Fig. 1, by rectifier power source (100), electronic commutation bridge (200), unsteady flow (300), commutation bridge control unit (400) drive unit (500), threephase load six parts such as (600) are formed.
Fig. 2 obtains DC power supply by civil power after rectifier (101) rectification, also can be, and, become level and smooth direct current through capacitor C filtering by storage battery power supply, after be input to electronic commutation bridge (200) and unsteady flow (300).The rotation of the commutation of the static switch of electronic commutation bridge and unsteady flow, conversion phase place according to the order of sequence, the synchronous interoperation of contact conduction current is united and is finished dc inverter to be three-phase alternating current, to be input to threephase load.
In order to guarantee that unsteady flow (300) rotates commutation according to the order of sequence and cooperates synchronously with the commutation of electronic commutation bridge (200) static switch, the present invention is provided with sub-drive unit of unsteady flow (500) and commutation bridge control unit (400).The sub-drive unit of unsteady flow is made up of drive control power supply (501) and driving servomotor (502).Drive control power supply can be according to the rotating speed of load needs controlling and driving servomotor, thereby reaches the purpose of regulating reverse frequency.The commutation bridge control unit is made up of signal patch (401), detecting element (402) and gate pole control circuit (403).Signal patch is an alternate figure of offering three 60 ° of breach covering of the fans, it and the coaxial servo-actuated of unsteady flow (300).Detecting element (402) adopts light-sensitive element or electromagnetic component, and the detecting element fixed static is installed, and gate pole control circuit (403), frequency signal detecting element (102), frequency-voltage conversion circuit (103) are custom circuit.When the coaxial servo-actuated of signal patch and unsteady flow, the illumination induction of the open detecting element of the relief area of signal patch is output as one state, the illumination of signal patch covering of the fan occlusion detection element, induction is output as " 0 " attitude, when signal is sent into the gate pole control circuit and is adjusted to one state, make the electronic switch T1 conducting of electronic commutation bridge, T2 turn-offs; T1 turn-offs during " 0 " attitude, the T2 conducting.60 ° of angles of the unsteady flow every rotation of son, the break-make relation transformation of the electronic switch of electronic commutation bridge once.Detecting sensing element is non-sensing contact, also can be the sensing contact of mechanical contact-type.
Bear to the commutation of threephase load electric current is by electronic switching element-turn-off thyristor T1, T2, diode D1, D2 form the electronic commutation bridge.The electronic commutation bridge can be the cutoff thyristor (GTO) that self-switching-off capability is arranged, high-power huge transistor (GTR), and field effect high power valve (MOSFET) is formed.It also can be the thyristor that needs the auxiliary turn-off circuit of band.Large power, electrically sub-elements such as reverse conducting triode thyristor are formed.Can also adopt some other novel high-power electronic component.
Fig. 3, Fig. 4, it is unsteady flow that the present invention designs, Fig. 4 is axial arranged figure, on the axle of insulation, settled the slip ring of three conductions to be called collector ring: just to encircle (301), negative ring (303), commutative ring (302), have one group of brush to contact with it on every slip ring: just to brush (304), negative brush (306) commutation brush (305).Just encircle, just brush, bear the input circuit of ring, negative brush, commutative ring, commutation brush formation unsteady flow.Another position at axle surrounds a garden week by several pieces collector plates.With four is example: a slice positive, a slice negative film, two commutator segments.And alternately with the order of commutator segment (308), positive (307), commutator segment (310), negative film (309); Isolate with insulating material between sheet.By the commutator segment positive, the garden week that commutator segment negative film and lamination insulation surround is called the unsteady flow ring.Have the three-phase output brush to contact with it on week in the garden of unsteady flow ring, the three-phase output brush is, and: A brushes mutually that (312), B brush (313) mutually, C brushes (314) mutually.The three-phase output brush distributes with 120 ° of how much angles on week in the garden, is made of the output loop of unsteady flow unsteady flow ring and three-phase output brush.The collector ring of input circuit is inner with the corresponding connection of electric conducting material with each collector plate of output loop unsteady flow ring.
Unsteady flow can also be designed to carousel-type: the structure of shaft type is launched to become the carousel-type floor plan, and it forms structure and shaft type roughly the same, as Fig. 3.The distressed structure that other type also can be arranged.
To some special loads, the garden of unsteady flow ring can be provided with five phases, seven and equate heterogeneous output brush on week, be suitable for the needs of multiphase load, becomes heterogeneous hybrid frequency-changing speed governer.
No matter being shaft type structure, carousel-type structure or other distressed structure, unsteady flow represents with the electrical symbol of Fig. 3.
With the form equivalence of circuit of the present invention with Fig. 5, and will be divided into six service areas with counterclockwise direction by the garden week that commutator segment (308), positive (307), commutator segment (310), negative film (309) surround, I) 0 °～60 °, II) 60 °～120 °, III) 120 °～180 °, IV) 180 °～240 °, V) 240 °～300 °, VI) 300 °～360 °.And 0 °, 180 ° 0 °, the 180 ° electric commutation lines that are decided to be unsteady flow at the geometric center lines of commutator segment (308) (310)-how much angles of unsteady flow.Inversion process axis whenever any phase brush of threephase load contacts with commutator segment (308), overlaps with 0 ° of electric commutation line at the center line of brush when turning clockwise, and when crossing, the electronic switch of electronic commutation bridge (T2) turn-offs, (T1) conducting.The polarity of voltage of commutator segment (308) (310) is just being become by negative, the terminal potential of this phase load is just being become by negative, the electronic commutation bridge has been born the electric current commutation for this phase load, electric current electronic switch (T1) the commutation other two-phase brush one of moment of flowing through is contacting with positive, one contacts with negative film, the terminal potential of load and the positive that is contacted, negative film are identical, and load current directly contacts conduction.Any one contacts with commutator segment (310) in the threephase load brush, when this center line to brush overlaps and crosses with 180 ° of electric commutation lines, electronic commutation bridge electronic switch (T1) becomes shutoff by conducting, (T2) become conducting by shutoff, commutator segment (308) (310) polarity of voltage is by just becoming negative, the terminal voltage of this phase is by just becoming negative, the electronic commutation bridge has been born the electric current commutation mutually for this, the electric current electronic switch (T2) of flowing through, two-phase brush in addition, one contacts with positive, one contacts with negative film, and the electric current of this two-phase directly contacts conduction, so the commutation of threephase load electric current is that a phase load brush is on commutator segment.Two-phase brush in addition, one at positive, and one at negative film, and the electronic switch action of electronic commutation bridge is this phase load commutation on commutator segment, and this changes circulation and carries out along with the rotation of axle.
In the dynamic process of inversion, it is directly conduction that load current contacts with positive or negative film at each phase brush, when contacting with commutator segment, and the electric current electronic switch of flowing through.The electronic commutation bridge is at the moment reactive load electric current that the finishes commutation fly-wheel diode (D1) or (D2) reverse then of flowing through, from electronic switch (T1) or (T2) circulation, when axle rotates, during on-load brush short circuit insulation tank, this moment, electronic switch still kept conducting after commutation, commutator segment equates (differing from the arm resistance of an electronic commutation bridge) with positive that will move into or negative film current potential, the brush of short circuit insulation tank contacts with positive or negative film with commutator segment simultaneously, and this brush is from commutator segment and positive or two part conduction currents of negative film.The size of current of each several part is got exhausted in the internal resistance of each branch road, be the arm parameter and the contact area of brush on each sheet of electronic commutation bridge, rotation with axle, the contact area of brush between two changes, the current strength of each branch road changes thereupon, treats that brush moves into positive or negative film fully, or moves into commutator segment by positive or negative film, this phase load electric current transfers direct contact conduction to, or the electronic commutation bridge of flowing through is transmitted to load through brush with contacting of commutator segment again.
Fig. 6 a-f is described in detail of the present invention one all dynamic processes: behind rectifying and wave-filtering the positive pole of DC power supply, negative pole respectively by just brush (304), just encircle (301), negative brush (306), negative ring (303) be input to positive (307), negative film (309), the Q of electronic commutation bridge (200) select current potential and brushes (305) commutative ring (302) through commutation and be input to commutator segment (308) (310).The positive polarity of voltage just remains in the unsteady flow axle rotary course, and the negative film polarity of voltage remains negative, and the polarity of voltage of commutator segment depends on the current potential that electronic commutation bridge Q is ordered.Electronic switch (T2) turn-offs (T1) conducting, and commutator segment (308) (310) just is all, and electronic switch (T1) turn-offs (T2) conducting, and commutator segment (308) (310) is all negative.
The dynamic process I, 0～60 ° of A of Fig. 6 a Shaft angle brushes mutually from the VI district and moves into the I district, operates in the I district, and the A phase terminal voltage is for just; B brushes mutually from immigration V district, IV district and operates in the V district, and the B phase terminal voltage is for negative; C brushes mutually from the II district and moves into the III district, operates in the III district, and the C phase terminal voltage is for just.When A brushes from immigration I district, VI district mutually, 0 ° of electric commutation line of center line that A brushes mutually and unsteady flow axle overlaps and crosses, the illumination of the open detecting element of signal patch (401) (402), the lead-out terminal (404) of gate pole control circuit (403) is that one state, (405) are " 0 " attitude, electronic switch (T2) becomes shutoff by conducting, (T1) become conducting by shutoff, and in 0～60 ° of maintenance of Shaft angle.The polarity of voltage of commutator segment (308) (310) just remains during this.
Dynamic process II, 60 °～120 ° of Fig. 6 b Shaft angles, A are brushed mutually and are moved into the II district from the I district and operate in the II district, and the A phase terminal voltage is for just; B moves into the VI district from the V district, when C moves into the IV district from the III district, C brushes center line mutually and overlaps and cross 180 ° of electric commutation lines with 180 ° of electric commutation lines, the illumination of signal patch (401) occlusion detection element (402), the output (404) of gate pole control circuit (403) is " 0 " attitude, electronic switch (T1) becomes shutoff by conducting, lead-out terminal (405) is " 1 ", electronic switch (T2) becomes conducting by shutoff, and keeps the polarity of voltage of commutator segment (308) (310) just to remain during this 60 °～120 ° of Shaft angles.
Dynamic process III～VI is analogized with above process, and said process goes round and begins again and realizes mixing inversion.Each phase load phase voltage, line voltage are shown in Fig. 8.
The signal patch that Fig. 7 uses for the present invention, 1. for the foregoing description is the signal band that threephase load produces six-step wave, shown in Fig. 8 waveform, 2. be the signal band that suppresses quintuple harmonics among the figure, 3. for suppressing the signal band of 5,7,11 subharmonic, 4. be pressure regulation detection signal band.
The zone design method of the signal band of threephase load output six-step wave is: 360 °/3/2=60 °
Fig. 9 a, b are for the 3. voltage oscillogram during bars band detection signal.
The design principle that will suppress the signal band of 5,7,11 subharmonic below in conjunction with Fig. 7, Fig. 9 is described further.
At first set: 1) the unsteady flow ring diameter is pressed the following formula design:
In the formula of φ 〉=(12B)/(Π): B is a brush thickness;
2) the break-make sequential of electronic commutation bridge T1T2, the cycle (pulsewidth) is set by signal patch;
3) 0 ° of 0 ° of geometry with unsteady flow of the geometry of signal patch is strict corresponding;
To install the line voltage waveform of output according to designing requirement and determine that this waveform can suppress 5,7,11 subharmonic, uses the Fu Shi series expansion shown in Fig. 9 b, its expansion is:
U1（t）＝
B ksint
k＝1
＝B1Esint+B3Esint+B5Esint+B7Esint+B9Esint+B11Esint+B13Esint+……2 Π/2
Bk=-∫ UAB(t in the formula) sinK td t
Π 0
UAB(t) be the line voltage magnitude.
0 0≤t1≤∝1
2E ∝1≤t2≤∝2
UAB（t）＝{0 ∝2≤t3≤∝3
2E ∝3≤t4≤∝4
0 ∝4≤t5≤∝5
2E ∝5≤t6≤∝6
Wherein: ∝ 1=12 °, ∝ 2=18 °, ∝ 3=30 °, ∝ 4=42 °
∝5＝48°，∝6＝90°。
∝ 1～6th, obtains by approximatioss, makes UAB(t) the voltage magnitude combined harmonic select to suppress the line voltage waveform that requires, shown in Fig. 9 b, try to achieve B1=1.043E, B5=0, B7=0.061E, B11=0.044E, B13=0.13E.
Its course of work is: one move into commutator segment mutually fully in the sub-rotation process of unsteady flow in the threephase load, and two-phase is in positive respectively in addition, during the negative film, the electronic commutation bridge carries out the bipolarity modulation mutually to this that moves into commutator segment.Brush mutually after negative film moves into commutator segment with A and to be for example Figure 10, among the figure β 0=0 °, β 1=12 °, β 2=18 °, β 3=348 °, β 4=342 °, A brushes mutually from negative film and moves into commutator segment fully,
A brushes mutually and has broken away from and the contacting of negative film, when the center line of brush and how much angles of axle overlap for 342 °, signal patch provides light signal makes T2 turn-off the T1 conducting, electronic commutation bridge Q current potential just is raised to by negative, the terminal potential of load A phase is just being become by negative, and axle rotates, and A brushes center line mutually and moves on to axle geometry angles and overlap for 348 °, signal patch provides signal makes T1 turn-off, the T2 conducting, the Q point is output as negative, and load A phase terminal voltage is negative by just reducing to; Axle rotates, and A brushes center line mutually and overlaps with 0 ° of (360 °) line, and signal patch provides light signal makes T2 turn-off, the T1 conducting, and the Q point just is output as, and the terminal potential of load A phase just is upgraded to by negative.Axle rotates, and A brushes 12 ° of lines of center line and axle mutually and overlaps, and signal patch provides signal makes T1 turn-off, the T2 conducting, and the Q point is output as negative, and A phase load terminal voltage is negative by just reducing to.Axle rotates, and A phase brush center line overlaps for 18 ° with axle, and signal patch provides light signal and makes the T2 shutoff, the T1 conducting, and Q is ordered and just is output as, and the A phase terminal voltage is for just.Begin this moment, and A phase brush is crossed over insulation tank, moves into positive from commutator segment; C phase brush is crossed over insulation tank simultaneously, moves into commutator segment from positive.This process is 18～42 ° of Shaft angle, has occupied the garden week of Π/15.Brush mutually at A and to move to 42 ° at axle how much angles, A brushes mutually and has broken away from and the contacting of commutator segment, and has moved into positive fully, and A phase terminal potential is for just and in geometry 18 °～162 ° intervals, angle keeping.Simultaneously C brushes mutually and has broken away from and the contacting of positive, and has moved into commutator segment fully, and the time ordered pair C that the electronic commutation bridge is set according to signal patch carries out the modulation of bipolarity break-make mutually.
This shows and adopt the humorous wave amplitude of above modulation system significant reduction to be arranged, and, the unlikely generation of load is significantly influenced because the filter action of motor inductance high order harmonic component is presented bigger impedance, so higher harmonic current is less than six rank ripples.
Description of drawings:
Fig. 1. the hybrid frequency-changing speed governer block diagram:
100-rectifier power source, 200-electronic commutation bridge, 300-unsteady flow, the 400-bridge control unit that commutates, 500-drive unit, 600-load;
Fig. 2. the hybrid frequency-changing speed governer key wiring diagram:
The 101-controlled rectifier, 102-frequency signal detecting element, 103-frequency-voltage conversion circuit, the 104-rectifier control circuit, T1, T2-controlled rectification element, D1, D2-rectifier cell, 300-unsteady flow, the 401-signal patch, 402-input control unit, 403-gate pole control circuit, 501-drive motors, 502-drive motors control circuit, the 600-load;
Fig. 3. the sub-schematic diagram of unsteady flow also is turntable type arrangement figure; Fig. 4. the axial arranged figure of unsteady flow; Fig. 5. mix the inverter equivalent circuit diagram; 301-just encircles, the 302-commutative ring, the negative ring of 303-, 304,305,306-just brush, commutate brush, negative brush be the input brush, the 307-positive, the 308-commutator segment, the 309-negative film, the 310-commutator segment, 312,313,314-just brush, commutate brush, bear that to brush be output brush; The 401-signal patch, the 402-signal detection component, the 403-gate pole controls circuit, 404,405-lead-out terminal, ZA, ZB, ZC-load, E rectification source, X-rotating shaft, I) district is 0～60 °, II) district is 60 °～120 °, III) distinguish 120 °～180 °, IV) distinguish 180 °～240 °, V) district is 240 °～300 °, VI) distinguish 300 °～360 °;
Fig. 6. inversion process schematic diagram: a) 0～60 ° of state diagram of unsteady flow rotation, b) 60 °～120 ° state diagrams of unsteady flow rotation, c) 120 °～180 ° state diagrams of unsteady flow rotation, d) the sub-Rotate 180 of unsteady flow °～240 ° of state diagrams, e) 240 °～300 ° state diagrams of unsteady flow rotation, f) 300 °～360 ° state diagrams of unsteady flow rotation;
The signal patch that Fig. 7 uses for the present invention 1. for the foregoing description is the signal band that threephase load produces six-step wave, 2. for suppressing the signal band of quintuple harmonics, 3. for suppressing the signal band of 5,7,11 subharmonic, 4. is pressure regulation detection signal band among the figure.
Fig. 8. load phase, line voltage oscillogram: UA(t)-A phase phase voltage waveform figure, UB(t)-B phase phase voltage waveform figure, Uc(t)-C phase phase voltage waveform figure, d) UAB, UBC, UCA-line voltage oscillogram;
Fig. 9. suppress the oscillogram of 5,7,11 subharmonic: Uq(t)-commutation bridge Q point potential diagram, UA(t), UB(t), UC(t)-A, B, C triple point potential diagram, UAB(t), UBC(t), UCA(t) the line voltage oscillogram;
Figure 10. corresponding electronic commutation bridge break-make modulation switch angle schematic diagram when the threephase load brush moves on commutator segment, switching angle is represented with β 0, β 1, β 2, β 3, β 4.
Claims (4)
1, a kind of hybrid frequency-changing speed governer, it is by rectification source (100), compositions such as inverter, it is characterized in that inverter is to mix inverter, be by electronic commutation bridge (200), unsteady flow (300), commutation bridge control unit (400), drive unit (500) is formed, unsteady flow (300) of the output of electronic commutation bridge and a rotation links, the rotating part of commutation bridge control unit (400) is signal patch (401), signal patch (401) is obeyed motors (501) with the department in unsteady flow (400) and the drive unit and is contained on the same axle, the stationary part of commutation bridge control unit (400) is made up of detecting element (402) and gate pole control circuit (403), signal patch (401) is corresponding to the angle position of unsteady flow (300), element (402) and gate pole control circuit after testing, in the control electronic commutation bridge (200) controlled rectification element alternately " leading to ", " break ", sliding contact conduction through the unsteady flow axle changes the load current direction again, realizes direct current is become the alternating current of required frequency.
2, mixed RHVC according to claim 1, it is by rectifier power source (100), electronic commutation bridge (200), unsteady flow (300), commutation bridge control unit (400), drive unit (500) is formed, unsteady flow that it is characterized in that it is by collector ring (301,302,303), unsteady flow ring (307,308,309,310), input brush (304,305,306) and output brush (312,313,314) form, in the input brush, what connect positive potential is positive brush (304), what connect negative potential is negative brush (306), connect the brush (305) that commutates that is of alternation current potential, in collector ring, introduce just being called of positive potential and encircle (301) by just brushing, introduce negative encircle (303) of being called of negative potential by negative brush, be called commutative ring (302) by what commutation brush was introduced the alternation current potential, collector ring (301,302,303) encircle for the whole garden of conduction, the unsteady flow ring is divided into the conducting strip of 4 or 4 multiple along garden week by design, and it is positive (307) in proper order, commutator segment (308), negative film (309), commutator segment (310) circulation.Positive, commutator segment, less insulation gap is arranged between the negative film, positive (307) with just encircle (301) and electrically connect, negative film (309) electrically connects with negative ring (303), commutator segment (308,310) electrically connect with commutative ring (302), collector ring (301,302,303) and unsteady flow ring (307,308,309,310) can rotate around X-axis, input, the relative X-axis of output brush is static, input brush (304,305,306) with collector ring (301,302,303) between, output brush (312,313,314) with unsteady flow ring (307,308,309,310) electrically contact for sliding between.
3, hybrid frequency-changing speed governer according to claim 1, the signal patch (401) of the bridge control unit that it is characterized in that commutating are a garden dish or garden tube, and 360 ° by required number of phases signalization band in garden dish or tube upper edge, garden.
4, the design of signal patch in a kind of mixing inverter that suppresses harmonic wave, it is characterized in that the signal band on the signal patch is to be provided with by the needs that suppress harmonic wave, it is designing requirement output line voltage Fu Shi series expansion, and set the humorous wave amplitude minimum value of required inhibition, obtain the line voltage waveform, superpose out behind the phase voltage waveform, calculate each phase current potential Ua(t), Ub(t), Uc(t), by Ua(t)+Ub(t)+Uc(t) obtain Q point current potential Uq(t), the lightproof area on the signal band is at 360 ° of garden Zhou Shangyu Uq(t) the corresponding setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101742 CN1065364A (en) | 1991-03-22 | 1991-03-22 | Hybrid frequency-changing speed governer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101742 CN1065364A (en) | 1991-03-22 | 1991-03-22 | Hybrid frequency-changing speed governer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1065364A true CN1065364A (en) | 1992-10-14 |
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ID=4905242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91101742 Pending CN1065364A (en) | 1991-03-22 | 1991-03-22 | Hybrid frequency-changing speed governer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1065364A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373769C (en) * | 1997-10-31 | 2008-03-05 | 株式会社日立制作所 | Power converter |
| CN100417539C (en) * | 2004-07-05 | 2008-09-10 | 段志辉 | Electro-mechanic mixed driving system of automobile |
| CN102857056A (en) * | 2011-06-30 | 2013-01-02 | 德昌电机(深圳)有限公司 | Brush direct-current motor |
| CN105452613A (en) * | 2013-06-06 | 2016-03-30 | 通用电气航空系统有限责任公司 | Jet engine assembly and method for generating electricity |
| CN102857056B (en) * | 2011-06-30 | 2016-12-14 | 德昌电机(深圳)有限公司 | Brushed DC motor |
| CN109873332A (en) * | 2019-02-24 | 2019-06-11 | 郑素英 | It is a kind of to be convenient for changing the electric power box of frequency based on noise reduction |
-
1991
- 1991-03-22 CN CN 91101742 patent/CN1065364A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373769C (en) * | 1997-10-31 | 2008-03-05 | 株式会社日立制作所 | Power converter |
| CN100417539C (en) * | 2004-07-05 | 2008-09-10 | 段志辉 | Electro-mechanic mixed driving system of automobile |
| CN102857056A (en) * | 2011-06-30 | 2013-01-02 | 德昌电机(深圳)有限公司 | Brush direct-current motor |
| CN102857056B (en) * | 2011-06-30 | 2016-12-14 | 德昌电机(深圳)有限公司 | Brushed DC motor |
| CN105452613A (en) * | 2013-06-06 | 2016-03-30 | 通用电气航空系统有限责任公司 | Jet engine assembly and method for generating electricity |
| US10830085B2 (en) | 2013-06-06 | 2020-11-10 | Ge Aviation Systems Llc | Jet engine assembly and method for generating electricity |
| CN109873332A (en) * | 2019-02-24 | 2019-06-11 | 郑素英 | It is a kind of to be convenient for changing the electric power box of frequency based on noise reduction |
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