7/26/2023 0 Comments Arduino pwm frequency![]() Keeping in mind that I don’t have board size constraint, and I need to reach similar specs of the previous drivers (but with a modern and more reactive solution), do you have any suggestion to something that could be easily retrieved?įinally regarding the S49E, weird things happens, if I load on the board the SimpleFOC Hall Sensor test Example and I move the BLDC motor it works fine, but then If I load another example where I try to move the motor, such as the open loop one, when I load back the Hall Sensor example If I rotate the rotor by hand as before, the debug value wiggles between 2 values and it does not move from 0, this happens for 2 or 3 minutes, then it goes back to normal (anything changed on the board, just the firmware, this is extremely strange). So redesigning and winding motor no problem.īut the drivers that you used are not available, anywhere… Have a linear encoder magnetic for closed loop. Yet another high-power 50A integrated BLDC Board announcement (for this, I planned to buy a stock of these: Double BTS7960 and unsolder the drivers for my boards (so as you see I am desperate). I am completely aware that they are obsolete, but I really can’t find a similar solution that is available in component stores this days… Regarding the B0505LS as I said before it was just for overkill the Isolation, currently my MCU power supply is a combination of a 1000uf low esr capacitor, followed by a 100nf ceramic one, then I prepare the 12V power line (that I need for other things not yet implemented) with a SRH05s12 which output then goes into a L78L05ACZTR that goes to the MCU, between the 5V and the MCU I wanted to add the B0505LS, but I am no more so sure that this is a wise regarding the Drivers, I used that exactly in the way I see in the Layout Considerations you quoted. I will post the design in the next both of you have said that I2C suffer when used with cables, should I use another protocol that this magnetic sensor are providing me? I know that SPI is worse noise wise, I think that what remains is PWM, I never used that sensor using this protocol but I saw that you have created an implementation in the SimpleFOC library for that, what are the advantages and disadvantages of using PWM in this specific case? My board design is currently just double layer, I don’t have size constraint this time, so I can adapt to the best solution possible you suggest (even if it is a single layer one). In theory, from that side I should be covered. I saw your previous posts in other threads, I am currently using a setup with Arduino Uno and somewhere you wrote that it (in theory) it should not need pullups for I2C. ![]() It should already have pullup resistors on board, so I didn’t added any other. Regarding the AS5600, for now I am evaluating that using this ready board: Yes I agree with both of you regarding the fact that I should face the problem and not hide away from it, I am just curious to see if this “overkill” solution would give some results! eheh Voltage spikes) by series resistors in the range of 10 kΩ. The digital inputs need to be protected from excess currents (e.g. A reasonable value for this capacitor would be about 470 nF. > current for the switching phase via a low inductance path and therefore reducing noise Or B6 bridge design, the voltage offset between the GND pins of the different devicesĪ ceramic capacitor from VS to GND close to each device is recommended to provide Ground pin of the device (GND / pin 1) is minimized. Therefore it is recommended to assure that the offsetīetween the ground connection of the slew rate resistor, the current sense resistor and Necessary in all switched high power bridges. Stray inductances have to be minimized in the power bridge design as it is I believe in another thread I posted an MCU that burst because I didn’t do that, luckily that was just an experiment, and noone got hurt.ĭue to the fast switching times for high currents, special care has to be taken to the PCB Have you done that? Else, you will get PWM output bleeding through ground back into whatever is connected. Just a side comment, that’s all.Įdit: One last thing, all IFX/BTN/BTS drivers have the same problem where the power ground is also logic ground, so you must take extra care to disconnect them. ![]() These are really old, discontinued drivers.
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