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  1. R

    Tl494+IR2110

    Hello every 1 in the Endless phere world. I recently built this motor speed controller based on TI's TL494 and IR2110 it works beautifully but i have not tested it under any load. I have the ir2110 configured as a dual low side driver which i took from Tahmids blog spot. Im not an engineer of...
  2. R

    555 timer

    Thanks everyone for replies. I found a cool online calculator based on the 555 timer and how to set the pwm frequency i do have SE555 which can operate on higher temps vs its brothers and sisters in the same family. It may not be accurate, but it will give me a ball park number of the...
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    555 timer

    Brushed for now
  4. R

    555 timer

    Hello ES. I will try to keep this post short so here goes. Is it possible to use the pwm out of the 555 timer and go into a mosfet gate driver. Ive been searching for an anwser on the internet with no luck. Im try to build my first dc motor speed controller possibly for high current and less...
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    Bootstrap capacitor

    Thanks alot this information will help me out greatly
  6. R

    Bootstrap capacitor

    Hello ES. I currently have in my possession. DGD 2181 high side low side gate driver by Diodes Inc. In the data there are no equation for calculating the bootstrap capacitor and surrounding safety componets for fets and the driver itself. Some data sheets contain this information and some dont...
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    Simple motor controller

    Thank u every1. I will be attending school soon for electronics and computer engineering. Reading the curriculum it will close the gap on what i dont know on motor controller design, programming, networking, solid state devices and many others related to the subject. I do have a A.S in Elec...
  8. R

    Simple motor controller

    Hello all, is it possible in this simple 555 circuit to supply the motor with a higher voltage with espect to the 12v that the 555 requires. From all my reading i have not seen it done
  9. R

    Esc current sensing

    Thanks everyone again
  10. R

    Esc current sensing

    Thanks to all for replies and comments. I would like to jump back into the senseing. Instaspin foc requires phase voltage and phase current senseing plus a few others. Ina240 for inline current measurment and should i sense the phase voltage before or after the shunt resistor. Thanks everyone...
  11. R

    Esc current sensing

    Thanks so much for the reply all will be considered greatly. Tms320f28027f came in a eval kit that i obtained from TI, i only desire foward/reverse from these escs and of course foc. 250a is more than enough. My motors can operate on 96vdc max but with space im limited to 18s-75.6vdc. Once more...
  12. R

    Esc current sensing

    75.6vdc input 200a burst 120a continuons the motor has a Rm of .0245 ohms, 415 kv 58mm/122mm. The esc im planning on building will be a beefed up version of a power tool esc for SL bldc motors. Tms320f28027f is my mcu of choice Switching freq around 50000khz with FOC algorithmes, phase voltage...
  13. R

    Esc current sensing

    Thanks for the reply. I have read countless data sheets, app notes and ref designs on SLBLDC motor controller design and construction 85% i fully get and the rest in over my head. Vishay has a .0003 ohm resistor that will put out about 5 watts of heat in my app, well within the soa of the...
  14. R

    Esc current sensing

    Hello all. Is it possible with shunts and op amps to sense over 100a for bldc motor controller design.
  15. R

    N channel mosfet gate charge.

    Thanks for the reply. All of the above has already been in motion. Over the past few years ive read countless articles, ref designs, data sheets etc. From my reading it will be in my best interest to use components and Ics that are designed for my purpose. I have a few LDOs, MCUs, Mosfet gate...
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    N channel mosfet gate charge.

    Hello everyone, what would be considered a low gate charge value on a power mosfer. Ex: 500nC, 600nC etc. Thanks.
  17. R

    Atmega328p 8 bit MCU

    Thanks for the reply. I saw a cool video on the tube a guy took a Atmega168 developement board and build his own speed controller for his EV. He provided is own power stage board complete with mosfets, drivers, caps, resistors, op amps and comparators etc. I want to do the same. My interest in...
  18. R

    Atmega328p 8 bit MCU

    Hello all at Endless Sphere. I have been brain storming for the pass few years on the idea of building my own speed controllers based on the atmega328p. My application voltage will be in the range of 60-75v dc and around 200- 300a continous. I found a few LDOs and DC to DC converters that will...
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