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Type: Posts; User: Electro nS

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  1. Closed: Is Axial Gap (pancake) motor better for servo drive applications

    I heard from someone that axial gap /pancake motors (lynch or etek) are better for servo control ( speed and position ) than standard radial flux DC motors. both motors are brushed type .

    I donot...
  2. Closed: Implementation of BiSS C interface for an encoder

    BiSS C DB3 protocol interface for Absolute encoder is Open Source and Free Communication protocol hardware compatible with SSI interface. And it is used widely in absolute position encoders. However...
  3. Closed: Various types of dc motors for traction application

    i am doing a research on which motor is better suited for Small EV or kart conversion using a fixed gear (single stage).

    the options available are : PMDC , SepEx , Series , BLDC . ( No ac motors )...
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    Closed: Re: boost output current of IR2184

    The same can be said for large mosfet module ?
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    Closed: Re: boost output current of IR2184

    total gate charge : 2500nC , Vcc =15v , turn on speed required : 1% 20khz = 0.5us

    then I=Q/t= 2500nC/0.5us=5A .

    this last equation i am not sure about and i would like you to correct my...
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    Closed: Re: boost output current of IR2184

    thank u very much !

    i have also found app note from diodes zetex for this application :http://www.diodes.com/_files/product_app_note_pdfs/zetex/dn80.pdf
    in page 2 the calculations for the power...
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    Closed: Re: boost output current of IR2184

    i totally understand bootstrap gate drivers and i have worked with IR21844 and it is a wonderful IC , espically the logic part of the circuit , the only limitation i am facing is the output current ....
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    Closed: boost output current of IR2184

    I am using the IR21844 in half bridge configuration , now i have to modify the circuit for a larger mosfet (2500nC gate charge total) , i would like to boost the output current into 4-5A ( from the...
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    Closed: Re: LM2576-5.0V Power Supply Problem.

    my advise buy new ICs from mouser or digikey or any good manufacturer and test again
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    Closed: Re: LM2576-5.0V Power Supply Problem.

    what ??!!
    this is a switching regulator , how did u calculate the power dissipation
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    Closed: Re: LM2576-5.0V Power Supply Problem.

    maybe the part is damaged due to ESD , since it is mos based IC it should be handled properly
    check your supplier and how are the components treated
  12. Closed: MPLAB X Harmony vs STM32CUBE ( PIC32 vs stm32 development software)

    hi everyone

    after some comparision of chips i have found that both stm32f4 and pic32mz are similar products interms of performance and both support my current and future needs.

    The question is...
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    Closed: Re: Sn754410 ic control dc motor

    the circuits you posted are for (4wire 2 coils) bipolar stepper motor, not dc motor !!!!

    you can use this IC to drive 2 DC motors ( Permenant magnet dc motor )
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    Closed: Re: DC Motor and diodes

    now i noticed something , there is no mension whether there are diodes on the coil of the relay ? these will affact the circuit more than those across the motor . provide a schematic or photo or the...
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    Closed: Re: DC Motor and diodes

    are you sure that these are not TVS diodes , they look the same as normal diodes . what is their part number ?
  16. Closed: Re: How to eliminate Gate Ringing of parallel Mosfets ?

    you have bad layout , and gate traces are flowing in the air
    your mosfet driver is NOT weak even though the mosfets and total gate charge is not stated (see IR2113 2.5A)
    use pulldown 10k on each...
  17. Closed: Need reference books on automation and control

    hello

    i am intersted in referrnce and books on building control systems ( closed loop PID , fuzzy , ....) for motors and such in industrial product , and i need some books to RE-UNDERSTAND the...
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    Closed: Re: Best way to use ADC and QEI

    it will be divided if 1 ADC is used due to channel multiplexing , but if the PIC contains 2 or 3 ADC , you can divided 2 channels per adc and get 375ksps for example .
    i recommand that you use the...
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    Closed: Re: Best way to use ADC and QEI

    this is very easy
    since the qea module caputres the encoders and do the decoding on its own , you just need to read a register (position count) to get the value this is better than using a separate...
  20. Closed: Re: Electronic multiturn encoders how they work ?

    i donot know if this is meant to answer my question , but it is unrelated to the point, i understand incremental encoder quiet well , the encoder i am asking about is being marketed as REAL absolute...
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    Closed: Re: best cnc machine for pcb fabrication

    for drilling you can easily find cncs in this price range .
    but the problem is routing , it would take ages to finish , because to acheive good resolution you have to use small milling bits <1mm ,...
  22. Closed: Re: Electronic multiturn encoders how they work ?

    thank u
    this is the most logical answer till now , althogh i thought when an encoder is marked as absolute whether single or multiturn , it means you must now where the position even if the power is...
  23. Closed: Re: Electronic multiturn encoders how they work ?

    this is a absolute multi-turn encoder , so I understand that there is an absolute disk capable of giving the position within one turn . but how it is able to count the number of turns if it is...
  24. Closed: Electronic multiturn encoders how they work ?

    i am intersted in understanding how multiturn encoders without mechanical gears work ?

    i have 2 theories from what i read : 1- internal battery (with eeprom to count) ?!
    ...
  25. [SOLVED]Closed: Re: H bridge driving method for servo control ?

    thanks for your input .

    regarding my question about the proper driving method i have found something on ti website claiming to be the best method ...
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