Be based on DSP to apply at the design of pulse power source of line cut machine tool

≤ of 4 μ M (Ra 0.

4 μ M) , treatment precision is ± 0.

005mm left and right sides. Does the power source of 1 pulse of cut of line of design block diagram that is power source of line cut pulse basically include the integral blueprint of power source of line cut pulse: ? Condition of voltage of clearance of module of enlarge of drive of unit of generation of the communication module of machine of C of Zuo of ⒂ of two of Bian of ǖ of twinkling of Gu Ao of  Yang urinate, pulse, power, discharge detects circuit module. Do this pulse power source and the difference that common thread cut machines pulse power source basically have at 2 o'clock: ? Astounded of word of sew of emperor prize  solemn grow permanent teeth tranquil be angry of entangled cook a meal does Huan Mian Mian fight summer of Gong Ran of Nuo string Miao? Fawn on of  of Luo M ü ? Have a nightmare of  of ⑸ of Chen of slope of Piao of Huan of  of  of  of inclined Ran Xi of  of stay of proceedings of Miao of male of ǖ of Zan of Qian of A Chinese-style unlined garment of Miao of male of Lai of  of  of outskirt of  of ぜ of wooden tablets or slips for writing of hole of  of Ke of  of earnestly of Qi stool barium growing permanent teeth owes dome ⒙ to grow permanent teeth ash of Wan of  of ox of Mi Nan lotus root slaughters bridle, the generation that uses pulse of its high speed simplifies groovy design circuit, efficiency is tall, weaveform is good, it may not be a bad idea of real time sex. 3 was to choose DSP2812, its substantial natural resources easily of software and hardware patulous. Smooth Ou circuit designs the photoelectricity lotus root of this design to add up to parts of an apparatus to use high-speed 6N135 chip, a height is enclosed inside dynatron of infra-red glow canal and photosensitive. Graph what 2 left show those who be 6N135 to draw foot and internal composition sketch map. The characteristic with sketch map of internal composition of graph 2 6N135 and the mainest 6N135 of circuit graph 　 with DSP interface is high rate, + =0.

5(RL=1.

9k) can show more on the segregation of interface of news report of high speed number so and develop the good character that its high speed spends adequately, the baud rate of data can amount to 500 K above. Under photograph comparing, common photoelectricity lotus root adds up to 4N25 of parts of an apparatus and TIL117 to be able to achieve the baud rate of thousands of only. Graph what 2 right place shows is / the connector principle figure that 6N136 uses at DSP to output pulse and main circuit. In a lot of advocate measure from structural industry in controlling a system, go up to prevent, the mutual interference that leaves an opportunity, using photoelectricity to keep apart parts of an apparatus is a kind of simple and effective method, use 6N135 to need not reduce communication to baud is led and realize the segregation between subsystem. The alternative that Nextpage 　 switch provides designs switch canal to use CT35SM-8 of module of IGBT of high speed of 3 water chestnut originally. Of the high-power IGBT such as commonly used before 2MBI200 enclose bigger, unfavorable the pulse power source that is used on the machine tool, its advantage is bulk small, compression is able to bear or endure stream bigger. The VCES of CT35SM-8 can achieve 400V, ICM can achieve 200A. The electric current of the 0~200A that this design asks to achieve can be achieved completely, frequency can amount to 5MHz, its internal resistance is less. The design of enlarge circuit uses AD8072 of commonly used amplifier, if the graph is shown 3 times,the circuit that its design pursues. Graph the 3 main circuit that use AD8072 design pursue condition of discharge clearance voltage detects circuit in imperceptible electric spark line cut machines a process in, clearance voltage changes as what machine condition and change, collect clearance voltage through real time, knowable this time paragraph the treatment status inside, control the feed direction of workbench then, implementation machines the closed-loop control of feed. Such not only the exterior quality after effectively control is machined, at the same time can give attention to two or morethings machines efficiency. To line cut, as a result of all sorts of existence that disturb an element, the condition that judges clearance according to collecting sample is not accurate, use sampling for many times to seek the means of average in the design, increased to judge the cycle that machines condition every time so apparently, but to it conflicting is shorter time paragraph the short circuit inside or voltage do not stabilize the exterior surface roughness that can cause treatment hind to worsen, if the system reacts time grows too, degree is more serious. Because this is opposite at average voltage testing system, the voltage testing system that is used at imperceptible treatment should be had faster answer speed. Workpiece and electrode silk are polar after the wave of voltage classics filter between divides the A/D mouth that TMS320F2812 introduces after pressing, the imitate signal of successive change changeover is the digital signal of disperse, DSP times the number after changeover information reads in the processing with hand-in-hand corresponding travel, should read in data average operation has after number reachs formulary number, the voltage value after the DSP after operation is finished will be average passes asynchronous serial communication circuit is passed into go up a machine. We can part with experimental result through emulating above all in the register that to voltage of on any account two kinds of circumstances occupy the requirement that compares for nothing to stock TMS320F2812 to PWM. We can detect through A/D changeover main circuit is tall voltage cut or low voltage cut. Pass get killed to make what TMS320F2812 generation and place need undee and corresponding PWM occupy sky comparing through the PC next, such we are OK the better voltage cut that goes controlling silk of main circuit electrode to go up is undee. The DSP2812 of this design works actually in power source in the process, DSP majority time is reached with the collection at clearance voltage information, operation deferent, only the transfer that a few time use at parameter of pulse report source control, improve the work efficiency of DSP effectively. The emulation of power source of line cut pulse is designed originally used Pspice9.

2 software do main circuit weaveform to emulate. In emulate current limliting resistor is installed respectively 1, the Ω of 2, 5 resistor that differs through the setting and different PWM occupy sky comparing to search appropriate weaveform, if the graph is shown 4 times, operate what personnel can install switch to know the resistor size that will install main circuit. Graph volts d.c. of main circuit of setting of graph of emulation principle of circuit of PSPICE of 5 main circuit is blueprint of resistor of current limliting of 4 main circuit tall voltage cut, 300v. Occupy sky comparing to get the undee graph 6-1 EVA of 6 installs the PWM to output semmetry pursueing according to what differ, occupy sky comparing 1/3, setting of 6-2 EVA of graph of Nextpage of weaveform of main circuit electric current is the PWM that outputs semmetry, occupy sky comparing 1/2, setting of 6-3 EVA of graph of weaveform of main circuit electric current is the PWM that outputs semmetry, occupy sky comparing 2/3, weaveform of main circuit electric current is in graph 6-1 by C of formulary T=R × , T=L/R knowable, main circuit resistor very hour, fill discharge time to basically be decided by T=L/R right now, voltage weaveform is so steeper, when making sure cut electric current wants voltage weaveform to satisfy a requirement again, we are forced to change constitute sky comparing bulk. But if be opposite when voltaic size is superabundant to cut requirement, our OK also and proper addition resistance will adjust voltaic weaveform. Conclusion: In tall voltage cut of big electric current falls, setting pulse is 2/3. The undee to voltage electric current requirement of the cut of undee and contented line that can assure to output so. Volts d.c. of setting main circuit is low voltage cut, 80v. Occupy sky comparing according to differring, get a picture 7 weaveform. Setting of graph 7-1 EVA is the PWM that outputs semmetry, occupy sky comparing 1/3, setting of 7-2 EVA of graph of weaveform of main circuit electric current is the PWM that outputs semmetry, occupy sky comparing 1/2, setting of 7-3 EVA of graph of weaveform of main circuit electric current is the PWM that outputs semmetry, occupy sky comparing 2/3, conclusion of weaveform of main circuit electric current: In low voltage cut of bigger electric current falls, setting PWM occupies sky comparing big a little bit, weaveform satisfies a requirement more. In low voltage cut of lesser electric current falls, setting PWM takes sky comparing bit, weaveform satisfies a requirement more. But sky comparing is occupied to set when little tension cut for 2/3 weaveform major while is used at corroding, especially when current limliting resistance is greater, such output weaveform can make workpiece surface scald.

Integrated above two kinds of circumstances, we are 80V in main circuit voltage when, we install PWM to occupy sky comparing to be 1/2, the undee to voltage electric current requirement of the cut of undee and contented line that can assure to output so. The most appropriate when singling out tall low-pressure cut after taking sky comparing and resistance, we consider capacitance and inductance to be affected to its next. Undertake to capacitance Param scans. Setting of parameter of capacitance All Parametric Sweep is 0.

1 0.

5 1 5 10. Nextpage 　 to achieve cut of tall electric current, resistor of our main circuit still chooses 1 ohm, if such emulation weaveform pursues 8. Graph the weaveform when the undee voltage when 8 voltage are 300v is 80v shows weaveform by plan institute knowable, the impact of main circuit weaveform to make choice of is very little. We undertake to inductance Param scans, parameter setting is 0.

1 1 5 10 20, if pursue,its emulate a result 9. Graph the weaveform when the undee voltage when 9 voltage are 300v is 80v shows weaveform by plan institute knowable, the wave motion of inductance is affected to the main circuit weaveform of make choice of also is very small. The influence with the because inductance capacitance is opposite undee to electric current change of the resistance at main circuit is very small, the change that the electric current on electrode silk basically accepts resistor is bigger. Tall voltage cut and low tension raised when this kind of power source is designing epilogue the cut of two kinds of circumstances (80V and 300V or other) . As a result of the PWM that arises to DSP when tall voltage and low voltage cut occupy sky comparing to have special demand, the basis detects electric current of main circuit voltage is undee, in software design we join automatic change to take the course that compares for nothing. Such making cut can achieve expectant result. CNC Milling CNC Machining