CN201557032U - Variable frequency motor and potential energy loading high-speed-ratio frequency conversion system for hoisting machinery - Google Patents
Variable frequency motor and potential energy loading high-speed-ratio frequency conversion system for hoisting machinery Download PDFInfo
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- CN201557032U CN201557032U CN2009201989542U CN200920198954U CN201557032U CN 201557032 U CN201557032 U CN 201557032U CN 2009201989542 U CN2009201989542 U CN 2009201989542U CN 200920198954 U CN200920198954 U CN 200920198954U CN 201557032 U CN201557032 U CN 201557032U
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Abstract
A variable frequency motor belongs to the technical field of an electric driving control device. The motor comprises a motor rotor, a cage type bus bar and a stator sleeved outside of the rotor, wherein the stator has 60 to 80 slots; the pitch is ranged from 6 to 10; and the slot number q of each electrode and phase is ranged from 2 to 5. The utility model also provides a frequency conversion system for hoisting machinery used in the variable frequency motor. The variable frequency motor can output a constant torque under a condition of 2 to 20 Hz with a basic frequency being 20 Hz so as to realize the speed adjustable range of 2 to 100 Hz. The frequency conversion system can easily realize the step-less speed regulation, can stably quicken, slow down and brake, stop and reverse and has small impact on the structure of the hoisting machinery and the steel structure so the service life of the hoisting machinery is prolonged and the work efficiency of the hoisting machinery is promoted.
Description
Technical field
The utility model belongs to the technical field of Electric Drive control appliance, be specifically related to a kind ofly can just can export permanent torque at 2～20HZ, fundamental frequency is 20HZ, so as to realize 2～100HZ speed adjustable range variable-frequency motor and use the high speed ratio frequency conversion system of hoisting machinery potential energy load of this variable-frequency motor.
Background technology
Present domestic hoisting machinery potential energy load governing system mainly is to adopt rotor crosstalk resistance, eddy speed regulating, pole changing etc., and its drive system mechanical property is soft, and speed adjustable range is narrow, and the stability and the adjusting speed accuracy of whole system speed are relatively poor; It is not steady to play braking, very big to the impact of complete machine steel construction, and slide hook phenomenon easily takes place in especially aerial lifting, has had a strong impact on the safe operation of hoisting machinery.
For this reason, need to adopt frequency control, but owing to be subjected to the restriction of homemade variable-frequency motor and converter technique, the frequency control scope that is used for the potential energy load at present can only be in 1: 20, i.e. 5～100Hz.
Prior art does not have can realize that hoisting machinery when heavy duty can smooth starting do not slip hook, and can long-term low cruise (speed reaches 0.05m/min), accurately contraposition, the high speed ratio frequency conversion system of potential energy load that can high-speed cruising during underloading.
Summary of the invention
In order to overcome the above-mentioned defective of prior art, the purpose of the utility model be to provide a kind of simple in structure, reliability is high, stepless speed regulation, stable working, safety, can realize high speed governing in 1: 50 and low cruise, accurately contraposition again; High-speed cruising improves the variable-frequency motor of work efficiency and the frequency conversion speed-adjusting system that is applied to the load of hoisting machinery potential energy.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of variable-frequency motor comprises rotor, squirrel-cage bus and is placed in the outer stator of rotor that the groove number that it is characterized in that described stator is 60～80 grooves, and pitch is 6～10, and it is 2～5 that every extremely every phase groove is counted q.
Preferably optimal technical scheme is 72 grooves for the groove number when described stator, and pitch is 8, and it is 3 that every extremely every phase groove is counted q.5 times, the winding coefficient and the harmonic magnetic potential content of 7 subharmonic are all very low.
For reducing the low-frequency operation torque pulsation width of cloth, described rotor inductance L 2 is 0.003～0.004 henry, and rotor resistance R2 is 0.2～0.3 Europe
More preferably scheme is for being 0.0035 henry when rotor inductance L 2, and effect was particularly outstanding when rotor resistance R2 was 0.23 Europe.
The utility model also provides the frequency conversion speed-adjusting system of a kind of hoisting machinery potential energy load, comprises above-mentioned variable-frequency motor,
The combined operation platform, be used to send controlling party to, stop in emergency and fault resets and the master of the given frequency signal of control rate makes the combined operation platform of signal;
The PLC programmable controller makes signal in order to the combined operation platform master that accepts who is connected with the combined operation platform;
Frequency converter, built-in frequency converter digital quantity interface module, the master who accepts the PLC programmable controller makes signal, output mechanical hatching gate signal,
The combined operation platform is connected with the PLC Programmable Logic Controller, frequency converter digital module and frequency converter are connected with the PLC Programmable Logic Controller, variable-frequency motor connects with frequency converter, described Programmable Logic Controller output links to each other with three input terminals of frequency converter, the output signal of frequency converter is directly controlled the band-type brake control relay, described combined operation platform master makes signal send the input switch that the running instruction is input to the PLC programmable controller, after PLC programmable controller routine processes, be input to the outside frequency converter digital quantity order card of frequency converter by the output switch, frequency converter is converted into 0～10V analog quantity automatically and passes to frequency converter after receiving digital quantity signal.
Preferably, described frequency converter digital quantity interface module is frequency converter digital quantity interface module DI-16H2.
The motor shaft of described variable-frequency motor is equipped with incremental-rotating coder, is provided with the encoder interfaces plate PG-X2 that links to each other with encoder in the frequency converter.
Further, described frequency conversion system is provided with the security protection module of heavily loaded defence program, the underloading defence program of input Programmable Logic Controller, heavily loaded overspeed protection program, underloading overspeed protection program, upscale protection program, downscale protection program, frequency converter failure defence program, brake unit defence program.
Compare with existing traditional speed regulating device, the utlity model has following advantage:
(1) present common variable-frequency motor load characteristic is shown in accompanying drawing 1a, its fundamental frequency is 50Hz, 5～50Hz is a speed regulation by constant torque, motor output nominal torque, 50～100Hz is constant-power speed regulation, below 5Hz, motor output torque is significantly less than nominal torque, thereby motor is difficult to realize heavy load starting, easy generation slide hook phenomenon, low frequency stable operation for a long time.In the permanent power section of 50～100Hz, allow the property decline of load torque inverse time, tend to occur lifting by crane the not enough phenomenon of moment of accelerating in the air.The utility model variable-frequency motor load performance can keep permanent torque in 2～20Hz shown in accompanying drawing 1b, 20～100Hz keeps permanent power, reduces fundamental frequency voltage simultaneously, to improve the high speed accelerating torque.
(2) the prior art potential energy load kind of drive adopts rotor crosstalk resistance, eddy speed regulating, pole changing etc., and its drive system mechanical property is soft, and speed adjustable range is narrow, and the stability and the adjusting speed accuracy of whole system speed are relatively poor; It is not steady to play braking, impact very big to the complete machine steel construction, the utility model frequency conversion system then is easy to realize stepless speed regulation, it starts acceleration, retarding braking, stops and commutating all very steady, impact to the mechanism of hoisting machinery, steel construction is little, thus the useful life of having improved hoisting machinery.
(3) the high speed ratio frequency conversion system of the utility model can effectively improve hoisting machinery use work efficiency, hoisting machinery runs in 2～20Hz scope when heavy duty, realize speed regulation by constant torque, run on during underloading in 2～100Hz scope, realize constant-power speed regulation, improve its speed of service, thereby significantly mention efficiency, satisfied accurately requirement in place of low speed simultaneously again.
(4) the utility model uses squirrel cage motor, the advantage that can give full play to that squirrel cage motor is simple in structure, cost is low, sturdy and durablely almost avoid keeping in repair, volume is little, inertia is little.
(5) the utility model frequency control is when low cruise, and the slip copper loss is little, efficient is high, and no matter underloading or its inlet wire power factor of heavy duty are higher, and energy-saving effect is remarkable.When starting and throw-over, impulse current is little, and is little to the capacity requirement of incoming power, is particularly suitable for the Power Supplies Condition in building site.
(6) the utility model fail safe that frequency control helps improving hoisting machinery that hoists; frequency converter itself possesses perfect failure diagnosis and defencive function, and 150～200% zero-speed torque can be provided, and prevents weight slide hook; can realize the zero-speed band-type brake, reduce the wearing and tearing of mechanical hatching gate.
The utility model is tested in two the 250t doors machine of margin hydroelectric station, the hydroelectric station of Burma's maximum, the control of employing closed-loop vector, advanced technology, function admirable, gamut stepless speed regulation, flatness is good, and starting is quickened, slow down stop and commutate very steady, little to the hoisting machinery impact, this utility model speed adjustable range is big, the positioning accuracy height, in place accurate, this system safety good reliability, the utility model possesses underloading speedup function, high efficiency can improve the use work efficiency of hoisting machinery greatly, and performance that it is excellent and high reliability are that the AC speed-regulating mode of prior art is incomparable.
Description of drawings
Fig. 1 a is existing variable-frequency motor load characteristic figure; Fig. 1 b is the utility model variable-frequency motor load characteristic figure;
Fig. 2 is the frequency conversion speed-adjusting system structural representation of hoisting machinery potential energy load;
Fig. 3 is the electric drive schematic diagram;
Fig. 4 is the given schematic diagram of frequency conversion;
Fig. 5 is input control and protection module schematic diagram;
Fig. 6 is speed stage input figure;
Fig. 7 is the rotor grooved schematic diagram of the utility model variable-frequency motor.
Description of reference numerals: 1 for combined operation platform, 2 is that PLC programmable controller, 3 is that frequency converter, 4 is that variable-frequency motor, 5 is and the coaxial rotary encoder of variable-frequency motor (PG), and 6 is safety guard, and 8 is decelerator; 9 is reel.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described.
Variable-frequency motor of the present utility model, can just can export permanent torque at 2～20HZ, fundamental frequency is 20HZ, so that realize the speed adjustable range of 2～100HZ, concrete measure is as follows: design of electrical motor is multiple-grooved and short distance winding, the number of stator slots Q1=72 of this motor, pitch y=8 (whole distance is 9), it is 3 that every extremely every phase groove is counted q, and the number of pole-pairs of motor is 4; The number of phases of motor is 3.
General q value is big more, and 5 times, 7 subharmonic weakening effect are good more, the utility model q=3.Breadth coefficient, chording factor, the winding coefficient of main harmonic wave see the following form 1:
Table 1:
| Harmonic number υ | Breadth coefficient k qυ | Chording factor k yυ | Winding coefficient k ω | The three-phase composite magnetic power |
| 1 (first-harmonic) | 0.9598 | 0.9848 | 0.9452 | 100 |
| 5 | 0.2176 | 0.6428 | 0.2176 | 2.96 |
| 7 | 0.1774 | 0.342 | 0.1774 | 0.9 |
By table 1 as seen, 5 times, the winding coefficient and the harmonic magnetic potential content of 7 subharmonic are all very low.
In order to reduce low-frequency operation torque pulsation amplitude, suitably increase inductor rotor L2 during design rotor winding, reduce rotor resistance R2, to increase the time constant of rotor winding.Present embodiment rotor inductance L 2=0.0035 henry, rotor resistance R2=0.23 Ou ， The timeconstant=L2/R2=0.0035/0.23=0.015.(timeconstant of YZ250m-830Kw motor=0.0039).
The rotor grooved can be designed as wide and shallow rotor grooved, can reduce rotor leakage reactance, and is favourable for breakdown torque that improves motor and the assorted consumption of reduction.But concerning the motor of voltage source inverter power supply, reduce rotor leakage reactance to restriction higher harmonic current unfavorable (I υ=U1/ υ 2 (x1+x2)).During design rotor grooved, under the situation that the rotor tooth magnetic flux density allows, get rotor design wide and shallow as far as possible, rotor structure as shown in Figure 7, and suitably increase depth of rebate size hr0, reduce width of rebate size b02, make when reducing the rotor fundamental reactance, suitably increase harmonic leakage reactance again.How many rotor leakage reactances need be decreased to, and is that breakdown torque Tmax with motor is a target.Variable-frequency motor Tmax=3.2 of the present utility model doubly.
The silicon steel sheet of electric machine iron core is non-directional cold-rolling silicon steel disc DW470, and thickness is 0.5mm, and combination properties such as magnetization curve, damage curve are good, the axial flow blower air quantity 5000m of electric drilling match
3/ h.
The utility model motor has enough moment of accelerating when high speed, just can export nominal torque at 1Hz, and can stable operation in 2～100Hz, thereby make speed ratio reach 1: 50.
The utility model hoisting machinery Frequency Drive system sets up closed-loop control, increases the detection frequency of closed-loop encoder simultaneously.For guaranteeing the given interference-free influence of frequency converter, the digital quantity input is adopted in the frequency conversion input, by frequency converter internal digital amount interface module DI-16H, is transformed into analog quantity automatically, solves frequency converter output torque low frequency pulsating and given input problem of unstable.
The high speed ratio frequency conversion system of hoisting machinery potential energy of the present utility model load, comprise the combined operation platform, the PLC Programmable Logic Controller that is communicated with the combined operation platform, frequency converter digital module DI-16H2 and frequency converter with the PLC Programmable Logic Controller, the novel variable-frequency motor that connects with frequency converter, Programmable Logic Controller output links to each other with 1,2,4 input terminals of frequency converter.The band-type brake control relay of the M1 of frequency converter, the direct control brake device of M2 output signal, the control contactor normally opened contact of brake directly links to each other with frequency converter input terminal 5, confirms function to realize band-type brake.
The combined operation platform can send controlling party to, stop in emergency and fault resets and the master of the given frequency signal of control rate makes the combined operation platform of signal, the PLC programmable controller and the combined operation All-China Federation of Taiwan Compatriots are logical, accept its main signal that makes, frequency converter is communicated with the PLC programmable controller, can accept its master makes signal and can export the mechanical hatching gate signal, the utility model variable-frequency motor is connected with frequency converter, hoisting machinery band-type brake motor receives the mechanical hatching gate signal of frequency converter output, combined operation platform master makes signal send the input switch that the running instruction is input to the PLC programmable controller, after PLC programmable controller routine processes, be input to the external speed digital card DI-16H2 of frequency converter by the output switch, frequency converter is converted into 0～2 after receiving digital quantity signal automatically
16Analog quantity.The given signal that is equivalent to 0～10V is passed to frequency converter.
The incremental-rotating coder that is contained on the motor shaft is arranged in the utility model system, and rotary encoder is input to detected motor speed signal among the frequency converter encoder interfaces plate PG-X2, realizes the negative velocity feedback closed-loop control.
In the utility model system safety guard is arranged, comprise heavy duty protection, underloading protection, heavily loaded overspeed protection, underloading overspeed protection, upscale protection, downscale protection, frequency converter failure protection, the brake unit protection of importing Programmable Logic Controller.
Frequency converter output load current and motor speed signal are given Programmable Logic Controller in the utility model system, to realize load current and multiple functions such as motor speed demonstration, overcurrent protection and overspeed protection.
Combined operation platform master make signal comprise controlling party to, stop in emergency and fault resets and the given frequency signal of control rate, it is inputed to PLC, PLC is through after the routine processes, send operating instruction (rotating) and the given frequency instruction of 16 bit digital quantity to frequency converter, the frequency converter output torque, and confirming that output torque can guarantee that weight does not slip behind the hook with load balance, send the band-type brake control signal, through auxiliary relay, directly remove to control mechanical brake, mechanical hatching gate is unclamped, thereby by given rotation direction and the operation of given speed value; During heavy duty, motor runs in 2～20Hz scope, runs on during underloading in 2～100Hz scope, and it is the signal that sends according to the loading instrument that its speed transforms.
When ramp to stop, speed lowers rapidly until being 0.6Hz under the electric braking moment loading, frequency converter is under the situation of guaranteeing torque this moment and load balance, send the band-type brake control signal and give the band-type brake relay, mechanical hatching gate is held tightly, with the coaxial mounted rotary encoder of variable-frequency motor detected motor velocity signal is inputed to frequency converter, thereby realize the negative velocity feedback closed-loop control; When safety guard action or frequency converter itself detect fault, control signal is inputed to PLC, carry out corresponding routine processes and export control signal by PLC, thereby realize safeguard protection.
Control system figure referring to Fig. 2.The utility model comprises combined operation platform 1, and model is a Siemens S7-314PLC programmable controller 2, and model is the frequency converter 3 of peace river VS-616G7B4075; novel variable-frequency motor 4; with the coaxial rotary encoder of variable-frequency motor (PG) 5, safety guard 6, mechanical hatching gate motor 7.Remaining sequence number 8,9 is respectively decelerator, reel.The rotary encoder PG that installs with motor coaxle detects the actual speed of motor, actual speed signal is fed back to frequency converter, after comparing with given speed instruction, carry out the regulating and controlling of speed by deviation signal, thereby constitute the negative velocity feedback closed-loop control system.
Referring to Fig. 3, be the electric drive schematic diagram, general supply by sky open QF52, reactor L51, contactor KM52 is input to the G7 frequency converter, frequency converter is exported to variable-frequency motor.Combined operation platform master makes signal send running instruction (forward or reverse) and gives PLC, outputs signal to frequency converter by PLC.Running instruction comprises just changes the input that instruction and counter-rotating instruction are input to PLC, PLC through after the routine processes by outputing to frequency converter multi-function input terminal 1 and 2, thereby realize forward or reverse;
Referring to Fig. 4, be the given schematic diagram of frequency conversion, combined operation platform master makes the given instruction of signal speed (frequency), be converted into the digital input interface plate DI-16H2 that 16 bit digital quantity are exported to frequency converter by PLC, frequency conversion parameter b 1-01=3 is set selects the tab input of speed command by frequency converter, b1-02=1 running instruction is to be imported by the Frequency Converter Control loop terminals.
Referring to Fig. 5,,, spacing up and down, overload, overspeed protection have been adopted respectively at heavy/two kinds of different operating modes of underloading for input control and protection figure.
Referring to Fig. 6, be speed stage input figure, speed command makes signal and heavy/light rate selection switch decision by the joint action table master, and divides five grades of speed to input to PLC, handle the digital quantity interface module DI-16H2 that output 16 bit digital quantity signals are given frequency converter through PLC, and be converted into 2 automatically by it
0～2
16Analog quantity.The given signal that is equivalent to 0～10V is passed to frequency converter.
(1), severe duty (2～20Hz) speed governing:
Realize by the permanent magnetic flux frequency control below the fundamental frequency of frequency converter, be speed regulation by constant torque, can realize the stepless speed regulation between 2～20Hz normal speed.
Speed command is imported by DI-16H2, and the joint action table rate selection switch is heavy duty, and promptly underloading high speed instruction ignore does not possess the underloading high-speed functions.
Select the tab DI-16H2 input of speed command by frequency converter by converter parameter b1-01=3 is set, as shown in Figure 4, corresponding data is 2
0～2
15, promptly 1～32768.The frequency converter mainboard receive from be converted into automatically after the data of DI-16H2 analog signals 0～+ 10V, respective frequencies is 0～100Hz, it is 20HZ that converter parameter E1-06=20 selection fundamental frequency is set, when so heavily loaded, give frequency converter by PLC output 655～6554, then the given frequency instruction of representative be 2～+ 20HZ, thereby frequency converter just runs in 2～20Hz.
When the combined operation platform is given by zero-bit during to maximum gear, frequency converter quickens according to the set accelerating time 5s of parameters C 1-01=5, and speed begins to accelerate to rated speed by zero.When the combined operation platform is got back to zero-bit by maximum, promptly send ramp to stop instruction, frequency converter slows down according to set 5s deceleration time of parameters C 1-02=5, and speed is reduced speed now until being zero by normal speed.
(2) underloading speedup
Realize by the weak magnetic variation speed governing frequently more than the fundamental frequency of frequency converter,, can realize the stepless speed control between 10～100Hz for approximate permanent power rotating speed.
Speed command is imported by DI-16H2, and the joint action table rate selection switch is a underloading, and promptly heavy-duty low-speed instruction ignore does not possess the heavy-duty low-speed function, receives the underloading signal from the loading instrument simultaneously.
Converter parameter is provided with as follows:
By being set, converter parameter b1-01=3 selects the tab DI-16H2 input of speed command by frequency converter, it is 20HZ that converter parameter E1-06=20 selection fundamental frequency is set, so during underloading, give frequency converter by PLC output 3277～32768, then the given frequency instruction of representative be 10～+ 100HZ, thereby frequency converter just runs in 10～100Hz.
As the above analysis, realize that the underloading speedup need satisfy two conditions: the one, from the underloading signal of loading instrument, the 2nd, the underloading speedup instruction of joint action table, the former is could speedup when guaranteeing underload, thereby when the underloading speedup motor nonoverload; The latter is for the ease of operator's control, after confirming that building-site possesses the condition of underloading speedup, just sends the instruction of underloading speedup.
Frequency instruction value after the underloading speedup is between 10～100HZ.
Mechanical hatching gate is a normally closed type, and promptly band-type brake electrical power band-type brake unclamps, and band-type brake is held tightly during outage, and the power supply of band-type brake motor is controlled by contactor.
Frequency conversion Parameter H 2-01=21 is set, and to select multi-functional lead-out terminal M1-M2 be that band-type brake unclamps instruction, when it is closed, for band-type brake unclamps instruction, when it disconnects, then tightly instructs for band-type brake; H1-03=0 selects multi-function input terminal 5 to hold the affirmation instruction tightly for band-type brake.
Be to guarantee safety, unclamp instruction by the band-type brake of the multi-functional lead-out terminal M1-M2 output of frequency converter and be directly inputted to brake control relay loop, thus the action of control band-type brake:
Band-type brake control when (1) starting
During starting, drop in order to prevent weight, affirmation discharges band-type brake after keeping the necessary moment of load to produce.
Converter parameter (S1-01=0.6, S1-02=0.6) is set to be selected band-type brake to unclamp the frequency forward and backward to be 0.6HZ, S1-05=30, S1-06=30 selects band-type brake to unclamp the electric current forward and backward and is 30% of motor rated current, S1-07=70, S1-08=0 selection band-type brake unclamps moment and is just transferring 70% of motor rated moment to, is reversed to zero.
When (1) starting, the combined operation platform sends the running instruction, and the band-type brake of the multi-functional lead-out terminal M1 of frequency converter this moment, M2 output unclamps instruction still for opening, and band-type brake still keeps holding tightly state.Accelerate to band-type brake and postpone frequency 0.6HZ.At this moment, torque compensation (band PG vector control) according to set point, is transfused to automatically.
(2) after torque compensation is carried out in frequency converter inside, when satisfying following condition:
Frequency converter output frequency＞band-type brake unclamps frequency (forward and backward is 0.6HZ)
Frequency converter output current＞band-type brake unclamps electric current (forward and backward is 30%)
Frequency converter output torque＞band-type brake unclamps moment (just transferring 100% to, be reversed to zero)
Then the band-type brake of the multi-functional lead-out terminal M1 of frequency converter, M2 output unclamps instruction and becomes and close, and band-type brake is unclamped confirm instruction also for closing, and then contactor KM51, KM54 energising, thereby band-type brake is switched on and unclamped.
(3) accelerate to subsequently be input to the given frequency values of frequency converter by the combined operation platform till.
Band-type brake control when (2) stopping
When stopping, in order to prevent weight landing (slide hook), before band-type brake was held tightly fully, frequency converter must be output as the necessary moment of weight equalizer.
Converter parameter S1-12=0.6, S1-13=0.6 are set select band-type brake to hold the frequency forward and backward tightly to be 0.6HZ, it is 0.5s that b2-04=0.5 selects dwell time.
(1) the combined operation platform is got back to zero-bit when sending deceleration stop command, and running instruction P510 and P511 all open, and frequency converter slowed down by the deceleration time that is provided with, till zero-speed.
(2) when the frequency converter output frequency is held frequency (forward and backward is 0.6HZ) tightly less than band-type brake, the band-type brake of the multi-functional lead-out terminal M1 of frequency converter, M2 output unclamps instruction and becomes out, band-type brake is unclamped confirm that instruction also becomes out, make contactor KM51 outage on the other hand, thereby brake-contracting cut-off is held tightly.
When (3) frequency converter reached zero velocity, frequency converter was still exported the zero-speed torque with weight equalizer, and it is held time and is the set dwell time 0.5s of b2-4, stopped output then.
Band-type brake control when (3) forward and backward is switched
Under the closed-loop vector control mode, converter parameter S2-01=0, S2-02=0 are set selects the minimum ON time forward and backward of running instruction to be zero, when given frequency instruction is held frequency (forward and backward is 0.6HZ) tightly greater than band-type brake, then band-type brake is not held tightly when forward and backward is switched, keep the band-type brake releasing orientation always, thus realize from just forward counter-rotating to, from being inverted to the continuous running of just changeing.
(4) detection of band-type brake control fault
By being set, converter parameter H1-03=0 select frequency converter multi-function input terminal 5 to confirm instruction for band-type brake unclamps, SE1 detection time, SE2, SE3, SE4 that converter parameter S1-16=0.3, S1-17=1, S1-18=0.5, S1-19=0.5 selection band-type brake control fault are set are respectively 0.3s, 1s, 0.5s, 0.5s, thereby make frequency conversion possess measuring ability to the band-type brake control fault, when detecting the defined band-type brake fault of SE1, SE2, SE3, SE4, frequency converter stops output; Converter power supply is cut off in main contactor KM52 outage on the other hand, and then contactor KM51 outage, thereby the realization band-type brake is promptly held tightly.
Safety guard is shown in Fig. 2～5.
Converter parameter H1-01=24 is set selects multi-function input terminal 3 to be the external fault instruction, it is the fault reset instruction that H1-02=14 selects multi-function input terminal 4.
(1) external security defencive function
The external security protection is provided with heavy duty protection, underloading protection, heavily loaded overspeed protection, underloading overspeed protection, upscale protection, downscale protection, frequency converter failure protection, brake unit protection and emergency stop push button; they all are input to the input switch of PLC; wherein any one defencive function action; all can cut off the just commentaries on classics/counter-rotating instruction of frequency converter; thereby can not just finish changes/operation of reverse directions, and frequency converter can slow down until stopping according to the deceleration time that is provided with.
When the operator of door machine finds that emergency need be stopped in emergency as soon colliding with barrier, can press emergency stop push button, and directly instruction be inputed to frequency converter, frequency converter is slowed down fast.Cut off frequency converter and brake power supply, implement band-type brake, promptly stop.
(2) safety protection function of frequency converter inside
Frequency converter has very powerful fault detection capability; by the reasonable setting of converter parameter, can realize overload, cross moment, overvoltage, overcurrent, under voltage, phase shortage, short circuit, ground connection, stall, overrun, many defencive functions such as speed deviation signal is excessive, external fault.
Claims (8)
1. a variable-frequency motor comprises rotor, squirrel-cage bus and is placed in the outer stator of rotor, and the groove number that it is characterized in that described stator is 60～80 grooves, and pitch is 6～10, and it is 2～5 that every extremely every phase groove is counted q.
2. variable-frequency motor according to claim 1, the groove number that it is characterized in that described stator is 72 grooves, and pitch is 8, and it is 3 that every extremely every phase groove is counted q.
3. variable-frequency motor according to claim 1, it is characterized in that described rotor be inductance at 0.003～0.004 henry, the rotor of rotor resistance between 0.2～0.3 Europe.
4. as variable-frequency motor as described in the claim 3, it is characterized in that described rotor is the rotor of 0.0035 prosperous inductance, 0.23 Europe resistance.
5. the high speed ratio frequency conversion system of hoisting machinery potential energy load is characterized in that comprising:
Variable-frequency motor as claimed in claim 1;
The combined operation platform, be used to send controlling party to, stop in emergency and fault resets and the master of the given frequency signal of control rate makes the combined operation platform of signal;
The PLC programmable controller makes signal in order to the combined operation platform master that accepts who is connected with the combined operation platform;
Frequency converter, built-in frequency converter digital quantity interface module, the master who accepts the PLC programmable controller makes signal output mechanical hatching gate signal,
The combined operation platform is connected with the PLC Programmable Logic Controller, frequency converter digital module and frequency converter are connected with the PLC Programmable Logic Controller, variable-frequency motor is connected with frequency converter, described Programmable Logic Controller output links to each other with three input terminals of frequency converter, the output signal of frequency converter is directly controlled the band-type brake control relay, described combined operation platform master makes signal send the input switch that the running instruction is input to the PLC programmable controller, after PLC programmable controller routine processes, be input to the outside frequency converter digital quantity order card of frequency converter, be converted into 0～10V analog quantity automatically behind the frequency converter reception digital quantity signal and pass to frequency converter by the output switch.
6. the high speed ratio frequency conversion system of hoisting machinery potential energy according to claim 5 load is characterized in that described frequency converter digital quantity interface module is frequency converter digital quantity interface module DI-16H2.
7. the high speed ratio frequency conversion system of hoisting machinery potential energy according to claim 5 load is characterized in that the motor shaft of described variable-frequency motor is equipped with incremental-rotating coder, is provided with the encoder interfaces plate PG-X2 that links to each other with encoder in the frequency converter.
8. according to the high speed ratio frequency conversion system of the described hoisting machinery potential energy of one of claim 5-7 load, it is characterized in that described frequency conversion system is provided with the security protection module of the heavily loaded defence program of input Programmable Logic Controller, underloading defence program, heavily loaded overspeed protection program, underloading overspeed protection program, upscale protection program, downscale protection program, frequency converter failure defence program, brake unit defence program.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009201989542U CN201557032U (en) | 2009-10-26 | 2009-10-26 | Variable frequency motor and potential energy loading high-speed-ratio frequency conversion system for hoisting machinery |
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| CN2009201989542U CN201557032U (en) | 2009-10-26 | 2009-10-26 | Variable frequency motor and potential energy loading high-speed-ratio frequency conversion system for hoisting machinery |
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| CN2009201989542U Expired - Fee Related CN201557032U (en) | 2009-10-26 | 2009-10-26 | Variable frequency motor and potential energy loading high-speed-ratio frequency conversion system for hoisting machinery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104909274A (en) * | 2015-05-21 | 2015-09-16 | 杭州江河机电装备工程有限公司 | Hoisting machinery high-speed ratio transmission system |
| CN105162383A (en) * | 2015-09-23 | 2015-12-16 | 中国煤炭科工集团太原研究院有限公司 | AC frequency conversion speed regulation method simulating series excitation DC motor soft features |
| CN105384084A (en) * | 2015-12-28 | 2016-03-09 | 中科院成都信息技术股份有限公司 | Variable-frequency-speed-adjusting control system and method of tower-crane lifting mechanism |
| CN105490609A (en) * | 2015-12-21 | 2016-04-13 | 上海新时达电气股份有限公司 | Method and system for self-tuning of encoder zero point of motor by a servo |
| CN107804791A (en) * | 2017-11-01 | 2018-03-16 | 德马科起重机械有限公司 | A kind of gantry crane frequency-converting speed-governing control system |
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2009
- 2009-10-26 CN CN2009201989542U patent/CN201557032U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104909274A (en) * | 2015-05-21 | 2015-09-16 | 杭州江河机电装备工程有限公司 | Hoisting machinery high-speed ratio transmission system |
| CN105162383A (en) * | 2015-09-23 | 2015-12-16 | 中国煤炭科工集团太原研究院有限公司 | AC frequency conversion speed regulation method simulating series excitation DC motor soft features |
| CN105162383B (en) * | 2015-09-23 | 2018-12-14 | 中国煤炭科工集团太原研究院有限公司 | A kind of ac variable frequency speed regulation method for simulating series DC machine software feature |
| CN105490609A (en) * | 2015-12-21 | 2016-04-13 | 上海新时达电气股份有限公司 | Method and system for self-tuning of encoder zero point of motor by a servo |
| CN105490609B (en) * | 2015-12-21 | 2019-01-22 | 上海新时达电气股份有限公司 | The method and its system of servo Self-tuning System motor encoder zero point |
| CN105384084A (en) * | 2015-12-28 | 2016-03-09 | 中科院成都信息技术股份有限公司 | Variable-frequency-speed-adjusting control system and method of tower-crane lifting mechanism |
| CN107804791A (en) * | 2017-11-01 | 2018-03-16 | 德马科起重机械有限公司 | A kind of gantry crane frequency-converting speed-governing control system |
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