CN108809109A - Threephase asynchronous machine safety lock carrier wave frequency converter - Google Patents
Threephase asynchronous machine safety lock carrier wave frequency converter Download PDFInfo
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- CN108809109A CN108809109A CN201810499650.3A CN201810499650A CN108809109A CN 108809109 A CN108809109 A CN 108809109A CN 201810499650 A CN201810499650 A CN 201810499650A CN 108809109 A CN108809109 A CN 108809109A
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- 230000010355 oscillation Effects 0.000 claims description 8
- 230000033228 biological regulation Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000013256 coordination polymer Substances 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000006085 Schmidt reaction Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
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- 235000013399 edible fruits Nutrition 0.000 description 1
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- 238000003032 molecular docking Methods 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
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Abstract
The present invention relates to threephase asynchronous machine safety lock carrier wave frequency converters, the popular low cost application of micro-machine can be widely used in, machine power, light industry and machinery, food is weaved, the fields such as household electrical appliance, 1 vibrates fundamental wave for 300hz in figure, 2 trigger negative pulse for speed governing, 3 load output for a phases, 4 load output for b phases, 5 load output for c phases, 6 export for three equivalent of near sinusoidal, and V/2 comes from the series connection of two coils of motor, though having deviation in cutting magnetic line different angle, but all near V/2, waveform recoil can improve output torque when operation, three-phase output adjusts sine wave by two step voltages, it is that three-phase frequency is changed with the number for changing load wave, and the frequency for loading wave is constant, it is constant impedance to reach motor.
Description
Technical field
The present invention relates to threephase asynchronous machine safety lock carrier wave frequency converters, and it is popular low can be widely used in micro-machine
Cost application, machine power, light industry and machinery, food weaving, the fields such as household electrical appliance.
Background technology
Threephase asynchronous machine frequency converter is designed by synchronous frequency conversion and transformation at present, and asynchronous machine impedance is ideal not to the utmost,
When conversion frequencies are relatively low, motor impedance very little, small voltage exchange is close to direct current in a waveform, easily cause magnetic saturation and
Reduce torque output, is directed at the excessive fever of electric current.
Invention content
The operational process of variable-frequency motor, non-sine can be by capacitor and inductor amendments, and higher hamonic wave can be by capacitive absorption, electricity
The main reason for machine generates heat should be that AC coil is crossed direct current and caused, DC coil when crossing exchange required voltage want much lower, such as
For fruit frequency converter by digital carrier modulation, no matter high or low electric machine frequency is, and the square wave quantity for modulating three-phase is constant, when speed adjustable range ratio
When wider, carrier frequency difference bigger, it is also big to be formed by output impedance difference, if setting rated impedance by centre frequency,
It is unaffected that heat is readjusted the distribution upwards, and only output torque reduces, and is also comparable to become equivalent to the very big square wave frequency difference of downward
Direct current.Safety lock carrier wave frequency converter is with fundamental oscillation speed frequency division, and three waves, two level, three phase difference, it is close that two level constitute three waveforms
Like sine, three phase differences form three-phase alternating current, and every three waveforms are all made of fundamental wave, and crossover frequency is three-phase phase line frequency, base
Wave frequency rate is constant to motor impedance frequency, i.e., no matter the frequency variation of frequency conversion output, fundamental frequency is constant, then
The impedance of electrical-coil and electrical-coil when high rotating speed is the same when the slow-speed of revolution, is constant-power speed regulation in this way, use is digital
The frequency converter of regulation and control, the connection of output three-phase three wire triangle are divided into fundamental oscillation, and realization speed frequency division is stirred in counter increase and decrease,
It is characterized mainly in that：The non-conjunction of three inputs generates four " 1 " two " 0 " to shift register and recycles, and register
Three-state enable loads fundamental wave, exports to the sequential of six arms of inverter bridge, numeral output is of coupled connections with bridge arm for optocoupler, optocoupler two
Two dock, and are locked as only there are one power tube conducting with a pair of bridge arm, circuit structure is succinct, and frequency converter is no longer luxury goods, energy
The miniature device afforded to use as common size motor device.When input be 50hz three-phase alternating currents when, can directly rectification for become
Frequency device inputs, and realizes and hands over control, when single-phase input uses daylight lamp circuit rectification, frequency converter can be made small, press comprehensively
Button function realizes whole controls of small electric apparatus.
Description of the drawings
As shown in Figure 1 for using threephase asynchronous machine safety lock carrier wave converter circuit figure of the present invention
It is illustrated in figure 2 using threephase asynchronous machine safety lock carrier wave frequency converter oscillogram of the present invention
Specific implementation mode
It is to apply threephase asynchronous machine safety lock carrier wave converter circuit figure of the present invention as shown in Figure 1, IC1 is in figure
Four tunnel 2 of 74HC132 chips inputs Schmidt's reverser, two Schmidt's shaping button pulses, and button switch S1 meets Schmidt 5
Foot, S2 connect 9 feet, and 6 foot of Schmidt's reverser and 8 feet output button CP add to count to 5 foot of next Chip counter subtracts meter with 4 feet
Number, 4 foot of Schmidt's another way and 10 feet are that optocoupler inputs, C1, C2 to switch debounce dynamic condenser, two Schmidts 1,2,3,11,
12,13 feet are fundamental oscillation, and R1 22K, C3 are 104 to do oscillation delay, and output 300hz or so fundamental waves, R3 is on switch S1, S2
Pull-up resistor, R4, R5 are Schmidt's button coupling output pull-up resistor, and R6 is that chip sets 1 resistance, and OS1 is that input coupler is external
Microcontroller automatically increases or decreases speed regulating control, and R2 is coupling input current-limiting resistance.
IC2 be 74HC193 chips four can preset forward-backward counter, 16 grades of buttons are adjustable from 18.75hz to 300hz is adjusted
Series is divided, by the timing cycles of next chip, 3.12hz to the 50hz three-phase alternating currents of output 1/6th, counter is set
Number 1,9,10,15 foot of foot sets 1, and 2,3,6,7 foot of output pin is that 4, button counts output, and 4,5 feet are that the manual pulse of button switch increases
Subtract input, 12 feet are plus the low level of counting carry-out sets number to 11 feet, are used to press in highest point when button full scale, 13 feet are
Subtract the low level counted when borrowing the low level exported and shutdown and pass through NAND gate to 11 feet clear 0, is pressed when reducing to bottom for button
It is started in lowest point or low speed.
IC3 be similarly 74HC193 chips four can preset forward-backward counter, 4 positional numbers connect 4 meters of chip button
Number output, triggering cp access oscillation fundamental waves, adds to one carry pulse of complete 1 output, as next stage sequential on preset number
Trigger pulse, while setting number again and doing plus count again, so button IC2 counters have adjusted IC3 counters and set number, IC3 is from pre-
It sets to count to and fills it up with counter as one CP of output, the frequency as three-phase phase line is adjusted, and wiring is connected as 1,9,10,15 feet and connects
The counting of IC2 exports, and the counting output of 2,3,6,7 feet is hanging, and 4,13 feet are to borrow output with counting is subtracted to be connected, and abandon and subtract counting, and 5
Foot meets Schmidt and vibrates output, and 12 foot of carry-out sets number to 11 feet, while as next stage cp, 14 feet connect high level no clear 0.
IC4 is that three tunnel 3 of 74HC10 chips inputs non-conjunction, and 8,9,10,11 foot of one of non-conjunction does next stage
Data control input, another 1,2,12,13 foot of non-conjunction do reversed divided pulse as next stage chip store clock,
3,4,5,6 foot of non-conjunction makees reverser as button clear 0.
IC5 is the input of 8 bit string of 74HC595 chips and Output Shift Register, has shift LD and storage and tri-state defeated
Go out function, shift LD and the clock that storage is difference, 14 foot data input the output that connection comes from IC4 non-conjunctions in figure
8 feet, foot 1,2,3,4,5,6,7,15 be parallel output, effectively output six, 7,15 feet are vacant, 8 feet be ground, 16 feet be Vdd, 9
Foot is that Serial output is vacant, and 10 feet clear 0 come from shutdown low level, is not exported when shutting down, and 11 feet are data input clock
Line, connect IC3 frequency dividing export 12 feet, with 11 feet be antiphase input 12 feet be store clock line, connect 12 feet of IC4,
13 feet are to export to enable, and connect 11 feet of oscillation output IC1, and main function exports for three-phase loads fundamental wave, three in six
1,2,3 feet of output can be shown in that 01 complete 1 and goes out 0 by non-conjunction, at least go out 31 after displacement as 1,2,3 feet have 0 if, when 15 feet are 1
Shi Jiawei 41, then form four 1 two 0 cycles, four 1 most had more when 15 feet are 0, is also formed four 1 two 0 and is followed
Ring.When it is 0 that 1,2,3, which are all 1,15, then go out one 0, forming two 0 must be to four 1, when it is 1 that 1,2,3, which are all 1,15, just
Be four 1 must be to two 0, so arbitrary data when without clear 0 can enter into cycle, six feet 1,2,3,4,5,6 export
Four 1 two 0 sequential cycles, R9, R10, R11 are that sequential export drives current-limiting resistance.
The TLP521-4 of OS1, OS2 are two pieces of integrated optocouplers, and six of the input sequence connection IC5 of six optocouplers export,
One two, 34,56 only there are one optocouplers to be connected for optocoupler docking locking two-by-two, and the output of intermediate six optocouplers controls inversion two-by-two
Six arms of bridge, first optocoupler are booting relay, are connected by optocoupler input and output, and two in parallel in input and output
Button switch S3, S4, it is booting self-locking to press S4, presses S3 and then disconnects shutdowns, on pull down resistor R7 output booting high level and
It shuts down low level, IC5 clear 0,12 feet of the input connection IC3 of the 8th optocoupler is exported to button speed governing IC2 and three-phase when shutdown
Carry-out cp shows that output cp, R8 are that optocoupler inputs current-limiting resistance as coupling frequency.
Frequency converter exports inverter bridge and is made of the P pipes and the N pipes of T2, T4, T6 of six triodes T1, T3, T5, four 1 liang
A 0 digital loop distinguishes six triode gate poles of sequential control by optocoupler, and triode ON is sequentially T2T3, T3T6,
T6T1, T1T4, T4T5, T5T2, T2T3, R12 are three P pipe biasing resistors, and R13 is divider resistance, and R14 is three N
Pipe biasing resistor, optocoupler are connected between gate pole and biasing resistor, and output three-phase a, b, c to motor coil L 1, L2, L3 are triangle
Shape connects, and C4, C5, C6 are electrical-coil afterflow capacitance, and V+ and V- is input rectifying positive and negative anodes.
It is illustrated in figure 2 and applies threephase asynchronous machine safety lock carrier wave frequency converter oscillogram of the present invention, 1 is 300hz in figure
Fundamental wave is vibrated, 2 trigger negative pulse for speed governing, and 3 load output for a phases, and 4 load output for b phases, and 5 load output for c phases, and 6 be close
Like sinusoidal three equivalents output, and V/2 comes from the series connection of two coils of motor, though have partially in cutting magnetic line different angle
Difference, but all near V/2, waveform recoil can improve output torque when operation, and three-phase output adjusts sine wave by two step voltages, is
Number to change load wave changes three-phase frequency, and the frequency for loading wave is constant, and it is constant impedance to reach motor.
Claims (1)
1. the present invention relates to threephase asynchronous machine safety lock carrier wave frequency converter, can be widely used in micro-machine it is popular it is low at
This application, machine power, light industry and machinery, food weaving, the fields such as household electrical appliance, safety lock carrier wave frequency converter is with fundamental oscillation
Speed frequency division, three waves, two level, three phase difference, two level constitute three waveform near sinusoidals, and three phase differences form three-phase alternating current, often
Three waveforms are all made of fundamental wave, and crossover frequency is three-phase phase line frequency, and fundamental frequency is constant to motor impedance frequency, i.e.,
No matter the frequency of frequency conversion output changes, and fundamental frequency is constant, then electrical-coil and motor when high rotating speed in the slow-speed of revolution
The impedance of coil is the same, is constant-power speed regulation in this way, using the frequency converter of digital regulation and control, output three-phase three wire triangle
Connection, is divided into fundamental oscillation, and counter increase and decrease is stirred realization speed frequency division, is characterized mainly in that：The non-conjunction pair of three inputs
Shift register generates four " 1 " two " 0 " and recycles, and the three-state enable of register loads fundamental wave, output to inverter bridge six
The sequential of a arm, numeral output are of coupled connections with bridge arm for optocoupler, and optocoupler docks two-by-two, with a pair of bridge arm be locked as only there are one
Power tube is connected, and circuit structure is succinct, and frequency converter is no longer luxury goods, can be afforded to use as common size motor device small-sized
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810499650.3A CN108809109A (en) | 2018-05-21 | 2018-05-21 | Threephase asynchronous machine safety lock carrier wave frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810499650.3A CN108809109A (en) | 2018-05-21 | 2018-05-21 | Threephase asynchronous machine safety lock carrier wave frequency converter |
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| CN108809109A true CN108809109A (en) | 2018-11-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742932A (en) * | 2019-03-13 | 2019-05-10 | 国家电网有限公司 | A kind of driving circuit and driver |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643838A (en) * | 2009-09-12 | 2010-02-10 | 新兴河北工程技术有限公司 | Speed automatic control device of chain grating machine in pellet production |
| CN202531205U (en) * | 2012-04-13 | 2012-11-14 | 唐山开实机电设备有限公司 | Intelligent local ventilation system in pit of coal mine |
| CN105201877A (en) * | 2015-08-26 | 2015-12-30 | 宁波江东晟利工业产品设计有限公司 | Temperature-sensor-based portable intelligent-speed-regulation electric fan |
| CN107623476A (en) * | 2017-09-16 | 2018-01-23 | 武汉豪岩照明电子有限公司 | The permanent anti-frequency converter of threephase asynchronous machine |
-
2018
- 2018-05-21 CN CN201810499650.3A patent/CN108809109A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643838A (en) * | 2009-09-12 | 2010-02-10 | 新兴河北工程技术有限公司 | Speed automatic control device of chain grating machine in pellet production |
| CN202531205U (en) * | 2012-04-13 | 2012-11-14 | 唐山开实机电设备有限公司 | Intelligent local ventilation system in pit of coal mine |
| CN105201877A (en) * | 2015-08-26 | 2015-12-30 | 宁波江东晟利工业产品设计有限公司 | Temperature-sensor-based portable intelligent-speed-regulation electric fan |
| CN107623476A (en) * | 2017-09-16 | 2018-01-23 | 武汉豪岩照明电子有限公司 | The permanent anti-frequency converter of threephase asynchronous machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742932A (en) * | 2019-03-13 | 2019-05-10 | 国家电网有限公司 | A kind of driving circuit and driver |
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Application publication date: 20181113 |