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  1. E

    Large Currents vs Small Currents

    I want to know is it possible to distinguish between large currents and small currents. For example beyond certain Amps (ex. 1 Amp) it is called large current and below this it is small current etc? Is there is any such definition?
  2. E

    Few Clarifications on the IR2181

    The Vs and Vb are used for bootstrapping circuit it seems. I need to study on this, i have heard but never understood it.
  3. E

    Few Clarifications on the IR2181

    Sorry my mistake i wanted to say LIN is Low then LO is Low and hence Q6 is OFF
  4. E

    Few Clarifications on the IR2181

    Trying to decode the complete motor circuit from microchip and this is a continuation of the previous thread started, understanding the circuit related the IR2181 high side MOSFET driver. The screen shot of the circuit is below and i have attached the complete circuit. If i see the data...
  5. E

    What is the use of IC 74ACT244MTCX (dsPICDEM MCLV-2 development board)

    From above point i assume the ACT is only for level shifting and we are not concerned of the current rating of the ACT, if it can provide minimum current should be fine?
  6. E

    What is the use of IC 74ACT244MTCX (dsPICDEM MCLV-2 development board)

    How did u arrive at this conclusion? Can you please tell me? Suppose if i design my circuit, what is the parameter i have to look for in the data sheet to find out how much current it draws? In the present data sheet of IR2181, which parameter i have to look for to find out the current it draws...
  7. E

    What is the use of IC 74ACT244MTCX (dsPICDEM MCLV-2 development board)

    I have attached the schematic, the IC is referred in page3.
  8. E

    What is the use of IC 74ACT244MTCX (dsPICDEM MCLV-2 development board)

    Thank you very much for the support, I looked up to the datasheet and it is 24mA. So, i assume that the current levels are increasing from Micro to after the line driver (I confirm what the MCU deliver). One basic question i want to understand is, let us say the ACT is able to deliver 24mA, the...
  9. E

    What is the use of IC 74ACT244MTCX (dsPICDEM MCLV-2 development board)

    That is useful link, one further clarification is as per ohm's law if the voltage increases obviously the current should increase. Am i correct?
  10. E

    What is the use of IC 74ACT244MTCX (dsPICDEM MCLV-2 development board)

    I checked the circuit the following are the observations Pin 1 and Pin 19 are grounded and as per the data sheet and the truth table The outputs do not go to high impedance state. If the input is H/L the output is H/L. So, the main purpose of the IC is it will convert the 3.3V PWM signal to 5V...
  11. E

    What is the use of IC 74ACT244MTCX (dsPICDEM MCLV-2 development board)

    I have seen IC 74ACT244MTCX as a part of motor control circuit. I downloaded the data sheet and found as Line driver and when try to understand, i only see lot of tables and it is difficult grasp information. What is this IC, why do i need to use this?
  12. E

    Operating range of the devices

    Ok, understood it is a combination of several factors. But one clarification is suppose, if i have a regulator which has the capability of converting a particular input voltage for example the regulator i/p voltage is 18V to 32V and converts into 24V, 5V etc and other voltages as per the...
  13. E

    Operating range of the devices

    I observed for every device there is an operating range specified (ex:IC, individual components and system) by the minimum voltage and the maximum voltage. My understanding as per this specification is that for every device there is a fixed resistance for example R, if the minimum voltage is...
  14. E

    How long a motor can run

    It was running open load. No i did not measure with any tool, i don't have any, if i touch the motor with hand i found it very hot and not sure if it is the correct method of doing it. I need to buy a current probe to measure i have only a oscilloscope and i am operating with 24V adapter...
  15. E

    How long a motor can run

    I have seen this motor getting heated up very fast in some seconds, need to confirm again. But how do i know if the motor is running properly in continuous operation? The temperatures it is reaching is normal? What are the things i need to be careful, so that i don't damage the motor.
  16. E

    How long a motor can run

    Ok this is the one i planned to use.
  17. E

    How long a motor can run

    I plan to buy this board https://www.microchip.com/Developmenttools/ProductDetails/DM330021-2 I wanted to know how long this motor can run and how much time i have to cool, how to identify? Where can i get the details?
  18. E

    How long a motor can run

    If i take a synchronous motor and operate under the normal operating conditions and within its limits, Can i run the motor continuously like 24*7 or it is always required that it be stopped in between the operation to allow it to cool? If i keep operating the motor and provide the necessary...
  19. E

    Space Vector Modulation

    I am referring to the document attached and referring to the page 13, the svpwm is as below The document refers to the inverter with SVPWM applied, the input voltage is the Vdc to the inverter and when i observe the voltage output to the motor after svpwm is . I know this a sine wave...
  20. E

    Clarifications on the PWM signal

    Ok, i did not mean mail, it is forum.
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