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Type: Posts; User: Nihaludeen

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  1. Closed: Re: Micro controller affected by ripple from bldc motor

    Thank you guys for your responses and valuable comments. Hope switching noises reduced almost 60 to 70%.
    Even if there is any other think to be noted (like PCB design , choosing FET's or any...
  2. Closed: Re: Micro controller affected by ripple from bldc motor

    Yes iop95, i use separate 3.3v regulator (lm111733v) for micro controller.
    Sure i will try that LC filter in ir2110 supply pins. And also increase the resistance accordingly. I cant get this line...
  3. Closed: Re: Micro controller affected by ripple from bldc motor

    Yes FVM, what you said is correct. If we don't use the proper probes or probe connection, there will be inaccurate waveform.
    I connect the probe almost correctly(very near to micro controller's...
  4. Closed: Micro controller affected by ripple from bldc motor

    Hi friends, I am driving bldc motor(1kw) using stm32f1 micro controller and keil micro vision software as a compiler.
    While running motor on no load condition....
    - Motor runs good.
    - Sensing...
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    Closed: Re: PID algorithm for bldc controller

    Well thats good FvM, then i will go by "speed setpoint and actual speed (process value) are inputs, the controller output (manipulated value) steers the motor speed".
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    Closed: PID algorithm for bldc controller

    I want to apply PID algorithm for my bldc drive, But i want to now more about PID concept.
    I searched in internet and the understand a little about this algorithm.

    PID concept in motor drives......
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    Closed: Re: Shifting the waveform using op amp

    The waveform get shifted good by using level shifter circuit. Thank you friends for your response..

    - - - Updated - - -



    Sure i will try it

    - - - Updated - - -
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    Closed: Shifting the waveform using op amp

    I am trying to generate the SPWM using analog circuit, by comparing sine with triangular wave the output will be Sinusoidal PWM.

    - Here i am generating Sine wave of 50 HZ using wein bridge...
  9. Closed: Re: BLDC controller stuck at load condition

    - Motor description

    Model: BM1418ZXF

    Rated Operating Voltage: 48V DC
    Rated Power: 500W
    Rated Speed: 2800 RPM
    No Load Speed: 3100 RPM
    Full Load Current: 13.4A
    No Load Current: 4.0A
  10. Closed: BLDC controller stuck at load condition

    Hi friends,
    We are designing 3 phase inverter for a long while. Our controller works fine at no load condition when a load attached the controller stucks.

    Motor specification:
    -500w motor...
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    Closed: Re: Bldc motor heats up rapidly..

    Yes i have driving the motor by correct commutation state, the controller is good.But motor is getting hot as i mention above.
  12. Replies
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    Closed: Re: Bldc motor heats up rapidly..

    Just now i am tested the motor with my controller once again for one hour at 48 v and 2.5 amp (no load)...
    The measured result is...

    min..... motor temperature in degree C
    0...... ...
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    Closed: Bldc motor heats up rapidly..

    I am driving a 1KW bldc motor (CYM-A1-120) using my bldc inverter. And i am not sure the frequency of motor, So i constantly run at 7Khz. The motor runs fine with a little noise. The temperature of...
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    Closed: Re: Interfacing Stm32f1 with GSM

    No friend, i have changed the code slightly as i mentioned above(i use interrupt) and changed rx[] size.

    I getting a small problem,
    - Whenever i transmit to GSM as "AT", GSM will respond to arm...
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    Closed: Re: Interfacing Stm32f1 with GSM

    Thank you for the response, the problem was solved almost..,
    I use the interrupt for uart receive , now i am getting the response as "OK" from GSM.
    But i am having a small problem in that, the...
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    Closed: Re: Interfacing Stm32f1 with GSM

    V_OH, V_OL at transmitter and V_IH, V_IL at receiver GSM should not increase 2.8 v.
    So i reduced the transmitter of the arm by 2.8 v [1 K and 5.7 K resistor as voltage divider] as specified in the...
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    Closed: Re: Interfacing Stm32f1 with GSM

    I checked the first and third points, which was correct in my circuit friend.
    I need to check the voltage at gsm and arm [tx and rx] line.

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    I have tried but doesn't...
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    Closed: Interfacing Stm32f1 with GSM

    Hi friends, I am trying to interface GSM with my ARM controller [stm32f103c8t6].

    I knew a little about the working of GSM,
    - By sending the "AT" command to GSM, it will respond with a "OK"...
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    Closed: Re: Inrush current limiter

    Hi dude,
    I have a power source that is capable of producing 30amp safely, but when i connect to the inverter circuit. More amount of current will be forced to charge the 2200uf capacitor. So i want...
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    Closed: Inrush current limiter

    Hi friends, I am making an inverter circuit, when i connect the supply to the circuit spark produces. 2200uf capacitor is attached to my circuit, since it create inrush current(for few microsecond)...
  21. Closed: Re: Mosfet gets hot in 3 phase inverter circuit

    Now what capacitance do you intend to use? i didn't get you, in which place you are saying.
    How do you choose 100nF , friend could you explain.

    - sorry i am not having scope.

    Commutation...
  22. Closed: Re: Mosfet gets hot in 3 phase inverter circuit

    I supplied only 20volt to the inverter for 1kw motor.
    I didn't increase my supply because i think there is a mistake in my circuit.
    Calculation,
    Vin= 20v, I= 5amp, rds= 0.008
    I calculated for...
  23. Closed: Re: Mosfet gets hot in 3 phase inverter circuit

    Can i use UF4007 which is Ultra-fast reverse recovery time diode.
    Friend what causes my mosfet to heat too much, any suggestion. I calculated theoretically power loss and power dissipation.
    Power...
  24. Closed: Re: Mosfet gets hot in 3 phase inverter circuit

    Ok i will put snubber circuit across mosfet

    - - - Updated - - -



    I replaced capacitance across the power supply but no effect. 1n4148 is fast switching diode is used that, but no change.
    I...
  25. Closed: Re: Mosfet gets hot in 3 phase inverter circuit

    -inverter output is Square wave
    -yes my load is inductive load( 1kw motor )
    -To reduce power factor error by the inductance, I used a resistance at the gate. I think it will minimize it, or...
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