This is JMBA from the Philippines saying Good Morning to everyone! (11:59 AM | UTC+8:00 Manila Time Standard). I am a Computer Engineering Student and I am in deep trouble and need your help!
The whole point of this thread is to ask this: Why do you think this circuit failed?
We are graduating this school year, 2018-2019, and we made a thesis called: "ViReX-E | The Virtual Reality Exercise Equipment". It is a project where you will use an android phone with VR capabilities (Some phones doesnt have the function) to interface a VR game where you can walk on a treadmill but see different on the phone, simulating the experience as if youre walking on the virtual world with the same experience as you walk on the real world. The biggest downside of this project is it can only accomodate one direction of movement: Only Forward, but to use that as an advantage, we changed the scope from simulating an all capable vr world to being able to exercise in the vr world.
To see a bit preview of the project, you can visit this website. But I'm afraid I haven't updated it up to this date.
https://hackaday.io/project/161435-virexe-the-virtual-reality-way-to-exercise
Now my problem at the moment is regarding the design. To control the speed of the DC Motor (Max Rated 220VDC), I used an IGBT, FGA25N120. For reference, refer to the Diptrace Schematic below:
https://drive.google.com/open?id=1o1PsdpPP3Fx3-W1GJiY2FB1FhhU_CFaH
For those who do not see or can't open the Schematic, I included an image below:
I was still in testing phase, so I removed M2, M3, M4, and M5. The video below is the testing phase of the circuit:
As you can see in the video, the Treadmill run at the same speed when connected to 220VDC. The Test LEDs D8 and D9 never lit. PWM PIN [D2] was sending a 0% Duty Cycle. After the test run, Q1, the FGA25N120ANTD, had its Collector and Emitter shorted with 3 Ohms on either biases (Forward or Reverse). That's why the DC Motor kept running on 220VDC, Q1 was already busted right at that moment, the Collector was already shorted to the Ground, thats why the DC Motor was getting 220vdc at the moment.
My Arduino Mega is sending a PWM signal through D2. The Code is here
https://drive.google.com/open?id=1CebxuLfvB1ma5HS35T6kq_YHTi3Ty21_
I controlled the PWM Pin by sending A0 values from a 10K Potentiometer, dividing the 5 Volts and GND.
But I kept wondering why it broke. Is something the matter with my circuit? Why do you think my IGBT broke? Am I missing important pieces? Should I consider using a MOSFET? Please help me. I need to make this project possible, and I need your help guys Good day. You can also e-mail me, parekoy201@gmail.com
The whole point of this thread is to ask this: Why do you think this circuit failed?
We are graduating this school year, 2018-2019, and we made a thesis called: "ViReX-E | The Virtual Reality Exercise Equipment". It is a project where you will use an android phone with VR capabilities (Some phones doesnt have the function) to interface a VR game where you can walk on a treadmill but see different on the phone, simulating the experience as if youre walking on the virtual world with the same experience as you walk on the real world. The biggest downside of this project is it can only accomodate one direction of movement: Only Forward, but to use that as an advantage, we changed the scope from simulating an all capable vr world to being able to exercise in the vr world.
To see a bit preview of the project, you can visit this website. But I'm afraid I haven't updated it up to this date.
https://hackaday.io/project/161435-virexe-the-virtual-reality-way-to-exercise
Now my problem at the moment is regarding the design. To control the speed of the DC Motor (Max Rated 220VDC), I used an IGBT, FGA25N120. For reference, refer to the Diptrace Schematic below:
https://drive.google.com/open?id=1o1PsdpPP3Fx3-W1GJiY2FB1FhhU_CFaH
For those who do not see or can't open the Schematic, I included an image below:
As you can see in the video, the Treadmill run at the same speed when connected to 220VDC. The Test LEDs D8 and D9 never lit. PWM PIN [D2] was sending a 0% Duty Cycle. After the test run, Q1, the FGA25N120ANTD, had its Collector and Emitter shorted with 3 Ohms on either biases (Forward or Reverse). That's why the DC Motor kept running on 220VDC, Q1 was already busted right at that moment, the Collector was already shorted to the Ground, thats why the DC Motor was getting 220vdc at the moment.
My Arduino Mega is sending a PWM signal through D2. The Code is here
https://drive.google.com/open?id=1CebxuLfvB1ma5HS35T6kq_YHTi3Ty21_
I controlled the PWM Pin by sending A0 values from a 10K Potentiometer, dividing the 5 Volts and GND.
But I kept wondering why it broke. Is something the matter with my circuit? Why do you think my IGBT broke? Am I missing important pieces? Should I consider using a MOSFET? Please help me. I need to make this project possible, and I need your help guys Good day. You can also e-mail me, parekoy201@gmail.com