CN105337540A - Two-level circuit board for achieving permanent magnet synchronous motor frequency conversion soft start and grid-connected control - Google Patents
Two-level circuit board for achieving permanent magnet synchronous motor frequency conversion soft start and grid-connected control Download PDFInfo
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- CN105337540A CN105337540A CN201510833862.7A CN201510833862A CN105337540A CN 105337540 A CN105337540 A CN 105337540A CN 201510833862 A CN201510833862 A CN 201510833862A CN 105337540 A CN105337540 A CN 105337540A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/20—Arrangements for starting
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
Abstract
The invention discloses a two-level circuit board for achieving permanent magnet synchronous motor frequency conversion soft start and grid-connected control. The two-level circuit board comprises a voltage-current sampling module and a motor conversion position sampling module, wherein the voltage-current sampling module and the motor conversion position sampling module are used for respectively acquiring grid voltage, motor current and motor speed, used for converting the parameters into digital signals, used for transmitting the signals to a DSP (Digital Signal Processor), transmitting 6 paths of PWM (Pulse Width Modulation) electric signals through synergistic treatment of the DSP and FPGA (Field Programmable Gate Array), and used for driving 6 IGBTs (Insulated Gate Bipolar Transistors) of a voltage type two-level frequency converter to be powered on and off so as to achieve soft start of a permanent magnet synchronous motor; meanwhile, the DSP compares the grid voltage which is sampled in real time with three-phase voltage output from the frequency converter; and when a synchronous switching condition is met, the DSP transmits a switching control signal and feeds into a relay driving module to ignite the solenoid of a three-phase alternating current contactor, achieve on-off of the three-phase alternating current contactor, and finally achieve synchronous switching of frequency conversion of the permanent magnet synchronous motor to grid-connected frequency current impact. The problems of soft start of the permanent magnet synchronous motor and large current impact when switching from frequency conversion to working frequency of the permanent magnet synchronous motor can be solved.
Description
Technical field
The present invention relates to permagnetic synchronous motor frequency conversion soft start and synchronism switching field, be specifically related to a kind of two level circuit plates realizing permagnetic synchronous motor frequency conversion soft start and cutting-in control.
Background technology
Due to the direct difficulty in starting of high power permanent magnet synchronous motor, hard reboot can bring very large impulse current to damage motor body structure, and also can impact electrical network and other power supply units; Along with the fast development of power electronic device, the continuous reduction of price facilitates the frequency conversion soft start of Large Copacity permagnetic synchronous motor and the development of synchronism switching.The soft start of multiple stage permagnetic synchronous motor and the frequency control of a permanent magnet synchronous motors can be realized by investing a frequency converter, having saved cost and simple to operation.
In prior art, can there is phase deviation when grid phase, frequency or amplitude are suddenlyd change in traditional multiplication phase demodulation phase-locked loop, and this phase-locked loop needs corresponding hardware-assist circuit, and the temperature drift of secondary analog circuit can have an impact to the phase-locked accuracy of reality.And single synchronous coordinate PHASE-LOCKED LOOP PLL TECHNIQUE can, frequency discontinuity low in electrical network amplitude and grid phase sudden change time follow the tracks of grid phase rapidly, and without any need for auxiliary circuit, completely can be phase-locked by software simulating.Permagnetic synchronous motor is started by frequency converter and runs to power frequency, when single synchronous coordinate phase-locked loop link detects that the amplitude of frequency converter output voltage and line voltage, phase place, frequency are within the specific limits, carries out the synchronous grid-connected switching being converted to power frequency.
Because A.C. contactor exists the reason of switch time delay, be issued to A.C. contactor action in switching signal and there is certain time-delay, when making switching there is deviation and occur impulse current in phase place, therefore on the basis of great many of experiments, propose transfer sequence and the handoff delay time size of A.C. contactor, thus reduce the switch current impact caused when switching.Therefore, phase lock control technology, the action of switching device right times and be rationally switched and determined condition are accurately converted to the key that power frequency small area analysis impacts synchronism switching.As can be seen here, the frequency conversion soft start of permagnetic synchronous motor and cutting-in control plate are the hardcores realizing soft starter for motor and the little impulse current of synchronism switching.
Summary of the invention
The present invention is in order to solve permagnetic synchronous motor soft start, and permagnetic synchronous motor is by being converted to large impact current problems when power frequency switches, and provides a kind of two level circuit plates realizing permagnetic synchronous motor frequency conversion soft start and cutting-in control.
Two described level control circuit plates are with DSP (digital signal processor, and FPGA (field-programmable gate device DigitalSignalProcessing), Field-ProgrammableGateArray) be acp chip, also comprise power supply module, human-computer interaction module, electric current and voltage sampling module, analog/digital conversion module, motor speed position sampling module, relay driving module, electrical/optical modular converter, light/electric modular converter and D/A switch module.
The annexation of control circuit board is as follows: DSP connects power supply module simultaneously, human-computer interaction module, analog/digital conversion module, motor speed position sampling module, relay driving module, FPGA and D/A switch module; Analog/digital conversion model calling electric current and voltage sampling module; Relay driving module connects three-phase ac contactor.
The intercommunication mutually of the serial communication interface SCI port of DSP and RS232 Interface realization human-computer interaction module and DSP.
Electric current and voltage sampling module is sampled to electrical network three-phase voltage and motor inlet wire three-phase current, after sampled value is delivered in analog/digital conversion module, the analog signal of electrical network three-phase voltage and motor inlet wire three-phase current is converted into digital quantity and is sent in DSP by analog/digital conversion module;
Motor speed position sampling module is sampled to permanent magnet synchronous electric motor speed by increment type traying, obtains rotating speed and the position of permagnetic synchronous motor, signal A
+, A
-, B
+, B
-, Z
+, Z
-send in DSP;
FPGA connects electrical/optical modular converter and light/electric modular converter simultaneously, and electrical/optical modular converter and light/electric modular converter are connected the power electronic device IGBT (insulated gate bipolar transistor, InsulatedGatedBipolarTransistor) of frequency converter simultaneously;
DSP is handled as follows:
Control signal is started by arranging DSP and FPGA to human-computer interaction module, start DSP and FPGA, DSP utilizes the velocity information of sample the electrical network three-phase voltage, motor inlet wire three-phase current and the permagnetic synchronous motor that obtain, generates pulse modulation technology pwm pulse wave frequency, initial position and duty cycle information; And by data wire write FPGA internal register; FPGA sends the 6 road pwm pulse ripple signals of telecommunication, the 6 road pwm pulse ripple signals of telecommunication convert light signal to through electrical/optical modular converter, the turn-on and turn-off of 6 power electronic device IGBT in driving voltage type two level converter, frequency converter exports three-phase alternating voltage thus drives permagnetic synchronous motor running, realizes the frequency conversion soft start to permagnetic synchronous motor.
After frequency conversion soft start, DSP compares the three-phase voltage that the line voltage of real-time sampling and frequency converter export, when both amplitudes are equal, the difference of phase place is between-10 degree are to 10 degree, when frequency is between-0.5Hz to 0.5Hz, DSP sends switch-over control signal and sends into relay driving module, and the signal of telecommunication that relay driving module exports lights the line bag of three-phase ac contactor, realize the break-make of three-phase ac contactor, finally realize the synchronism switching that permagnetic synchronous motor is converted to electrical network power frequency.
Light/electric modular converter is when frequency converter switch I GBT breaks down, and light/electric modular converter converts fault-signal to the signal of telecommunication, and send in DSP through FPGA, DSP realizes the blockade of the pulse PWM ripple signal of telecommunication according to fault-signal.
D/A switch module is converted to analog signals the digital quantity signal that DSP sends and exports, and is realized the observation of analog signals by oscilloscope simultaneously.
The invention has the advantages that:
1, a kind ofly the frequency conversion soft start of permagnetic synchronous motor and two level circuit plates of cutting-in control are realized, main control chip adopts one piece of TMS320F28335DSP chip and one piece of EP2C8Q20818NFPGA, mutual cooperative achievement pulse PWM involves the generation of associated control signal, compared to TMS320F2812DSP control chip in the past and other kind control chip, required hardware is less, cost is cheaper, and the speed of service is more reliably and faster, and function is more complete.
2, realize the frequency conversion soft start of permagnetic synchronous motor and two level circuit plates of cutting-in control, relay driving module is directly integrated on control board, and lights the line bag of three-phase ac contactor by the signal of telecommunication, easy and simple to handle, more reliably.
3, realize the frequency conversion soft start of permagnetic synchronous motor and two level circuit plates of cutting-in control, Phototube Coupling is achieved to the isolation sampling of voltage, electric current, rotating speed, avoids the interference of large voltage to it, make sampling more accurate.
4, a kind ofly the frequency conversion soft start of permagnetic synchronous motor and two level circuit plates of cutting-in control are realized, realize the locking to grid voltage amplitude, phase place, frequency, phase-locking device traditional than ever mutually, it is without any need for auxiliary circuit, completely can by phase-locked to electrical network of software simulating, reliability, stability, convenience are greatly improved, and also can realize locking well when electrical network occurs falling fluctuation.
5, a kind ofly the frequency conversion soft start of permagnetic synchronous motor and two level circuit plates of cutting-in control are realized, by realizing the operation of associated control signal to touch-screen in human-computer interaction module, realize the initial position fix of permagnetic synchronous motor, motor frequency conversion soft start and the grid-connected switching controls of permagnetic synchronous motor; And achieve this device parameter problem adjustable online by human-computer interaction interface, evaded conventional keyboard and display screen combination and regulated bring loaded down with trivial details, picture is more directly perceived, regulates convenient.
Accompanying drawing explanation
Fig. 1 is that two level circuits of the present invention a kind of frequency conversion soft start and cutting-in control that realize permagnetic synchronous motor harden composition.
To be that the present invention is a kind of realize the frequency conversion soft start of permagnetic synchronous motor and the method flow diagram of cutting-in control to Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
A kind ofly realize the frequency conversion soft start of permagnetic synchronous motor and two level circuit plates of cutting-in control, as shown in Figure 1, with digital signal processor DSP and on-site programmable gate array FPGA for acp chip, also comprise power supply module, human-computer interaction module, electric current and voltage sampling module, analog/digital conversion module, motor speed position sampling module, relay driving module, electrical/optical modular converter, light/electric modular converter and D/A switch module.
The annexation of control circuit board is as follows: DSP connects power supply module simultaneously, human-computer interaction module, analog/digital conversion module, motor speed position sampling module, relay driving module, FPGA and D/A switch module; Analog/digital conversion model calling electric current and voltage sampling module; Relay driving module connects three-phase ac contactor.
FPGA connects electrical/optical modular converter and light/electric modular converter simultaneously, and electrical/optical modular converter is connected the switching device IGBT of frequency converter with light/electric modular converter simultaneously;
Light/electric modular converter is when in frequency converter, power electronic device IGBT breaks down, and converts the signal of telecommunication to power electronic device IGBT fault-signal in frequency converter, and send in DSP through FPGA, DSP realizes the blockade of the pulse PWM ripple signal of telecommunication according to fault-signal.
DSP selects TMS320F28335 chip, and FPGA selects EP2C8Q20818N chip; By the serial communication interface SCI port (serial communication interface) of DSP and the mutual communication connection of RS232 Interface realization human-computer interaction module and DSP.
Described power supply module other chips on circuit board provide+24V ,+15V ,+5V ,+3.3V ,+1.9V ,-15V power supply, and powering to whole system ensures normal work; DCP022415, HZD10-24S05, TPS75733 and TPS76801Q chip is selected to realize; Power-frequency voltage is converted into 24V DC power supply through Switching Power Supply S-150-24 and powers to master board, and direct current+24V produces+15V and-15V respectively through chip DCP022415; Direct current+24V is through chip HZD10-24S05 generation+5V; Direct current+5V is through chip TPS75733 generation+3.3V; Direct current+5V produces+1.9V power supply through chip TPS76801Q chip, and different electric pressures gives different chip power supply respectively, ensures that chip normally works.
Human-computer interaction module sets DSP main control unit software flag bit and regulating parameter and changes, and realizes parameter on-line control function etc.By the SCI port of DSP and the mutual communication connection of RS232 Interface realization touch-screen and DSP.
Electric current and voltage sampling module obtains line voltage by synchrotrans JH-TDB-300W and divider resistance sampling, obtains motor inlet wire three-phase current by current transformer LT58-S7 sampling;
The analog signal of electrical network three-phase voltage and motor inlet wire three-phase current is converted into digital quantity by chip I NA128 and chip OP284 and is sent in DSP control chip by analog/digital conversion module, realize line voltage and the corresponding coordinate transform of current of electric in DSP inside, and mains voltage signal is sent into the locking of phase-locked link realization to electrical network, the three-phase current signal of motor and motor velocity signal realize the soft start to motor two close cycles vector control.
Motor speed position sampling module is sampled to permanent magnet synchronous electric motor speed, obtains permagnetic synchronous motor tacho-pulse information, code-disc is produced A by increment type traying ZXB-28-150BM-CO5L sampling
+, A
-, B
+, B
-, Z
+, Z
-the eQEP module that signal is sent to DSP by the SCI module of DSP processes, and obtains the information such as the relevant rotating speed of motor, position, electrical degree and mechanical angle.
D/A switch circuit module is converted to analog signals the digital quantity signal that DSP sends by chip 128UK and exports, and realizes the observation to analog signals by oscilloscope.
Relay driving module selects DS75452 chip to realize; When DSP control chip sends switch-over control signal, switching signal outputs to No. 2 pins driving relay R ELAY-G5V by 4 pins of chip DS75452, light the line bag of three-phase ac contactor, realize the switch on and off operation of three-phase ac contactor, complete the switching that permagnetic synchronous motor is converted to power frequency.
Electrical/optical modular converter selects DS75451 chip to realize; DSP and FPGA control chip are sent signal of telecommunication pwm pulse ripple and is converted to light signal, light signal drives the break-make of power electronic device IGBT in frequency converter.The signal of telecommunication is received on No. 1 pin ANODE of fibre optical transmission chip HFBR1521 through chip DS75451, realizes the signal of telecommunication and changes to light signal.
Light/electric modular converter selects HFBR2521 chip to realize, and when frequency converter switch I GBT breaks down, fault light signal switching electrical signals, the signal of telecommunication passes back in DSP through FPGA.Fault light signal is sent on No. 4 pin RL and No. 1 pin V0 of chip HFBR2521, realizes the conversion of light signal to the signal of telecommunication.
Realize the frequency conversion soft start of permagnetic synchronous motor and a method for cutting-in control, as shown in Figure 2, concrete steps are as follows:
Step one, control board power on, and power supply module gives each chip power supply;
Step 2, human-computer interaction module set the initial given speed control signal of permagnetic synchronous motor by touch-screen, chip DSP and FPGA starts control signal, start phase-locked loop Absent measures signal;
Step 3, electric current and voltage sampling module are sampled to electrical network three-phase voltage and motor inlet wire three-phase current, after sampled value is sent in DSP by analog/digital conversion module;
Line voltage sampling is obtained by synchrotrans and divider resistance sampling, the inlet wire three-phase current of motor is obtained by current transformer sampling, and the sample line voltage that obtains and motor current signal are sent into analog/digital conversion circuit unit and carried out the conversion of analog quantity to digital quantity.
Analog/digital conversion circuit unit realizes the line voltage that collects and current of electric analog signal transforms digital signal, digital signal after conversion is sent in DSP and is carried out processing and computing, obtains the voltage signal needed for phase locked-loop unit and the motor three-phase current signal required for permagnetic synchronous motor two close cycles vector control system.
Step 4, motor speed position sampling module are sampled to permanent magnet synchronous electric motor speed by increment type traying, and the pulse signal that obtains is sent in DSP, obtain the rotating speed of permagnetic synchronous motor, position, electrical degree and mechanical angle information through DSP process;
The rotating speed of permagnetic synchronous motor and position sampling are obtained, the pulse signal A that increment type traying produces by increment type traying ZXB-28-150BM-CO5L sampling
+, A
-, B
+, B
-, Z
+, Z
-the enhancement mode quadrature coding pulse module eQEP module being sent to DSP by the SCI module of DSP is processed, and obtains the rotating speed of motor, position, electrical degree and mechanical angle information.
Step 5, DSP utilize the speed of the three-phase voltage of electrical network, motor inlet wire three-phase current and permagnetic synchronous motor, generate pulse modulation technology pwm pulse wave frequency, initial position and duty cycle information; And by data wire write FPGA internal register.
Step 501, electrical network three-phase voltage signal are transferred to the SPLL phase-locked loop link in DSP;
SPLL link comprises three-phase voltage coordinate transformation module, pi regulator module and I regulator module, electrical network three-phase voltage signal generates q shaft voltage component through three-phase voltage coordinate transformation module, and q shaft voltage component obtains the amplitude of electrical network, frequency and phase place after pi regulator module and I regulator module.
Step 502, motor speed position sampling module are sampled to the speed of permagnetic synchronous motor and position, obtain motor actual samples speed omega
r;
Step 503, by the given rotating speed ω of permagnetic synchronous motor
r *with motor actual samples speed omega
rdifference send in speed pi regulator module, obtain the given current component i of q axle
sq *;
Step 504, electric current coordinate transform is carried out to the three-phase inlet wire current of motor, obtain the component of d axle and the given voltage transformation amount of q axle respectively through current PI adjustor module;
The current component i of d axle is obtained respectively after electric current coordinate transform
sdwith the current component i of q axle
sq; D shaft current component is sent in d shaft current pi regulator module, obtains the component Δ u of the given voltage transformation amount of d axle
sd; Meanwhile, the given current component i of q
sq *with the current component i of q axle
sqbetween difference send in q shaft current pi regulator module, obtain the component Δ u of the given voltage transformation amount of q axle
sq;
The d shaft current component i obtained after step 505, electric current coordinate transform
sdwith the current component i of q axle
sqsend in electric voltage feed forward program module, obtain the given component of voltage u of d axle
sd *component of voltage u given with q axle
sq *.
The component of step 506, d axle and q axle given voltage transformation amount respectively with d axle and the given component of voltage of q axle poor, difference is sent in given voltage inverse transformation and argument conversion module and is obtained modulus value m and angle θ
m.
The component Δ u of given for d axle voltage transformation amount
sdcomponent of voltage u given with d axle
sd *between difference, the component Δ u of the given voltage transformation amount of q axle
sdcomponent of voltage u given with q axle
sq *between difference send in given voltage anti-change and argument conversion module and obtain a modulus value m and angle θ
m.
Step 507, modulus value m and angle θ
msend in PWM module the initial position, duty ratio and the frequency information that obtain needed for pwm pulse ripple, and be sent in FPGA by the GPIO mouth of DSP.
Step 6, control chip FPGA send 6 road pwm pulse ripple signals;
Step 7, the pwm pulse ripple signal of telecommunication convert light signal to through electrical/optical modular converter, drive IGBT turn-on and turn-off, thus drive permagnetic synchronous motor running.
When PWM pulse wave is in high level, power electronic device IGBT conducting, when PWM pulse wave is in low level, power electronic device IGBT turns off.By the switch OFF of IGBT, frequency converter exports three-phase alternating voltage and drives permagnetic synchronous motor running.
After step 8, frequency conversion soft start, electric current and voltage sampling module and motor speed position sampling module carry out real-time sampling to electrical network three-phase voltage, motor three-phase current, motor speed, in DSP, the amplitude of the three-phase voltage that electrical network three-phase voltage and frequency converter export, phase place, frequency are compared in real time, when both amplitude, phase place and frequency reach synchronism switching condition, DSP sends switching signal, realizes the synchronism switching of permagnetic synchronous motor to electrical network.
DSP sends into the phase-locked loop link in DSP program to the line voltage collected, the amplitude of real-time detection of grid, phase place, frequency.Amplitude, phase place, the frequency of the amplitude of the three-phase voltage of frequency converter output, phase place, frequency and electrical network is differentiated: when both amplitudes are equal by program, the difference of phase place is between-10 degree are to 10 degree, when frequency is between-0.5Hz to 0.5Hz, DSP sends switch-over control signal and sends into relay driving module, light relay drive the closed of three-phase ac contactor and turn off, realize the synchronism switching that permagnetic synchronous motor is converted to electrical network power frequency.
Mains voltage signal sends into the locking of phase-locked link realization to electrical network, whether the amplitude of Real-Time Monitoring frequency converter and electrical network equal, the difference of phase place whether between-10 degree are to 10 degree, when whether frequency between-0.5hz to 0.5hz, when meeting the requirements, DSP sends switch-over control signal.
After DSP control board of the present invention powers on, initialization related chip, the electrical network three-phase voltage gathered, motor inlet wire three-phase current, motor speed position signalling is sent in DSP control chip and is processed, through analog/digital conversion module, 6 road pwm pulse waveforms required for ePWM (enhancement mode pulse-width modulation) module of DSP inside and eQEP (enhancement quadrature coding pulse) module and fpga chip etc. generate, pwm pulse ripple is received on 6 fibre optical transmission chip HFBR1521 by chip DS75451, transform electrical signals becomes optical signal launch to go out by HFBR1521, and then the break-make realizing light signal control voltage type two level converter power electronic device IGBT controls.
The synchronism switching condition in DSP program is utilized to judge the amplitude of the amplitude of the line voltage collected, phase place, frequency and motor primary voltage, phase place, frequency, after its difference of differentiation within the specific limits, DSP control chip sends control switching signal, switching signal drives relay R ELAY-G5V by chip DS75452, realize the make-break operation of three-phase ac contactor, complete the grid-connected switching that permagnetic synchronous motor is converted to power frequency.
A kind of circuit board realizing permagnetic synchronous motor frequency conversion soft start and cutting-in control, realize permagnetic synchronous motor frequency conversion soft start and permagnetic synchronous motor is switched to power frequency state by frequency conversion state, all by adopting voltage-type two level converter or voltage-type three-level converter to realize; For voltage-type two level converter, sent the break-make of 6 road pwm pulse wavelength-division other control voltage type two level converters, 6 power electronic device IGBT by corresponding two level control circuit plates; For voltage-type three-level converter, sent the break-make of 12 road SVPWM impulse waves difference control voltage type three-level converters, 12 power electronic device IGBT by corresponding three-level control principle circuit board.
Claims (4)
1. one kind realizes two level circuit plates of permagnetic synchronous motor frequency conversion soft start and cutting-in control, it is characterized in that, described control circuit board for acp chip, also comprises power supply module, human-computer interaction module with DSP and FPGA, electric current and voltage sampling module, analog/digital conversion module, motor speed position sampling module, relay driving module, electrical/optical modular converter, light/electric modular converter and D/A switch module; DSP refers to digital signal processor, DigitalSignalProcessing; FPGA refers to field-programmable gate device, Field-ProgrammableGateArray;
The annexation of circuit board is as follows: DSP connects power supply module simultaneously, human-computer interaction module, analog/digital conversion module, motor speed position sampling module, relay driving module, FPGA and D/A switch module; Analog/digital conversion model calling electric current and voltage sampling module; FPGA connects electrical/optical modular converter and light/electric modular converter simultaneously, and electrical/optical modular converter is connected frequency converter power electronic device IGBT with light/electric modular converter simultaneously; Relay driving module connects three-phase ac contactor; Electric current and voltage sampling module is sampled to electrical network three-phase voltage and motor inlet wire three-phase current, after sampled value is delivered in analog/digital conversion module, the analog signal of electrical network three-phase voltage and motor inlet wire three-phase current is converted into digital quantity and is sent in DSP by analog/digital conversion module;
Motor speed position sampling module is sampled to permanent magnet synchronous electric motor speed by increment type traying, obtains rotating speed and the position of permagnetic synchronous motor, signal A
+, A
-, B
+, B
-, Z
+, Z
-send in DSP;
DSP is handled as follows:
By arranging human-computer interaction module: DSP and FPGA starts control signal and speed preset control signal, start DSP and FPGA, DSP utilizes the velocity information of sample the electrical network three-phase voltage, motor inlet wire three-phase current and the permagnetic synchronous motor that obtain, generates pulse modulation technology pwm pulse wave frequency, initial position and duty cycle information; And by data wire write FPGA internal register; FPGA sends the 6 road pwm pulse ripple signals of telecommunication, the 6 road pwm pulse ripple signals of telecommunication convert light signal to through electrical/optical modular converter, the turn-on and turn-off of 6 power electronic device IGBT in the frequency converter of driving voltage type two level, frequency converter exports three-phase alternating voltage thus drives permagnetic synchronous motor running, realizes the frequency conversion soft start to permagnetic synchronous motor;
After permagnetic synchronous motor frequency conversion soft start, DSP compares the three-phase voltage that the line voltage of real-time sampling and frequency converter export, when both amplitudes are equal, the difference of phase place is between-10 degree are to 10 degree, when frequency is between-0.5Hz to 0.5Hz, DSP sends switch-over control signal and sends into relay driving module, the signal of telecommunication that relay driving module exports lights the line bag of three-phase ac contactor, realize the break-make of three-phase ac contactor, finally realize the synchronism switching that permagnetic synchronous motor is converted to electrical network power frequency.
2. a kind ofly as claimed in claim 1 realize the frequency conversion soft start of permagnetic synchronous motor and two level circuit plates of cutting-in control, it is characterized in that, described DSP selects TMS320F28335 chip, and FPGA selects EP2C8Q20818N chip; The 6 road pwm signals that DSP and FPGA synergy formation voltage type two level converter power electronic device IGBT needs; The intercommunication mutually of the serial communication interface SCI port of DSP and RS232 Interface realization human-computer interaction module and DSP.
3. a kind ofly as claimed in claim 1 realize the frequency conversion soft start of permagnetic synchronous motor and two level circuit plates of cutting-in control, it is characterized in that, described light/electric modular converter is when frequency converter power electronic device IGBT breaks down, light/electric modular converter converts fault-signal to the signal of telecommunication, send in DSP through FPGA, DSP realizes the blockade of the pwm pulse ripple signal of telecommunication according to fault-signal.
4. a kind ofly as claimed in claim 1 realize the frequency conversion soft start of permagnetic synchronous motor and two level circuit plates of cutting-in control, it is characterized in that, described D/A switch module is converted to analog signals the digital quantity signal that DSP sends and exports, and is realized the observation of analog signals by oscilloscope simultaneously.
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| CN112904764A (en) * | 2021-01-15 | 2021-06-04 | 中国科学院光电技术研究所 | Space intersection butt joint laser radar scanning tracking control system and method |
| CN113759808A (en) * | 2021-09-29 | 2021-12-07 | 湖北三江航天万峰科技发展有限公司 | Fan monitoring system, method and device and computer storage medium |
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