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Recent content by marifhossain

  1. M

    Beginer to Programmable Logic Chips

    I want to reduce number of logic chips in my design. So I found that PAL, GALs, FPGAs can help. I need some good documentations to start and understand the differences of PAL, GAL, FPGA etc. I am a C programmer. Can I program GALs, PALs & FPGAs with C? If I can (with C) is there any software...
  2. M

    Inverter for driving 3 phase motors

    three phase inverters motor pwm Thanks marie65 and Mesut for sharing. Actually I was thinking that instead of using AND, NOR and other gate combination, GALs or PALs will reduce number of chips and also noise problems. I am lloking for good documentations for Vector Control Mechanim. What is...
  3. M

    Inverter for driving 3 phase motors

    3 phase ac motors using inverter power supply Thanks for your reply. Your informations will surely help me. Can you help me finding some proffesional inverter schematics and circuit diagrams? I am a microcontroller programmer for a long time and I will be able to take care of the SPWM and...
  4. M

    PWM design using IC555

    ic555 mosfet If the supply voltage is 12 to 15 vDC then you can directly drive the gate of the MOSFET through a resistor (56 ohms or less) and a diode (1N4148 or any small switching diode) from the PIN 3 of the 555 ------/\/\/\/\/\------- | | | |...
  5. M

    Trouble with Keil programming

    your wait() function is not detailed. there may be some problem. And if it is blank, I see a ; in it. Otherwise it seems ok!
  6. M

    Microcontroller Hang-out in High Voltage Applications.

    microcontroller hang I use microcontrollers for a long time in low voltage (instrumentation and display) applications. But when I tried to make a washing machine controller, I was in a real problem. The microcontroller operartes some small relays to drive some 220 volt operated devices of the...
  7. M

    Inverter for driving 3 phase motors

    dead time inverter mosfet controls I designed a three phase inverter for a 48 volt 3 phase ac motor. What I did was I designed a small chopper for generating 4 slit power supplies. One split supply for the lower three IGBTs of the Three Phase MOSFET/IGBT bridge and the other three for the three...
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