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Hello, Hello, It's about the smoke and the gases from the soldering / detaching station and the gases from the 3d printer.
I would like a professional and energy efficient equipment.
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Cool idea, Thanks
It would be interesting for a colleague to come up with an idea of a...
I agree with you but as you can see in the attached movie, the amplitude of the PWM signal oscillates when I actuate the potentiometer and adjust the frequency.
The Blue signal is the arduino PWM output and the yellow signal is the same arduino PWM after low pass filter...
Hello,Tthe code does not contain these functions - I ask you to implement these functions in code if you know how to do this.
As I said above, this code generates 3 sinewaves with variable frequency and only that.
The code compiles without errors just that to work well at frequencies below...
The IGBT module incorporates a NTC temperature sensor. This sensor should be read by arduino and if the temperature rises above the one set in the code to put the pin 6 on the high and thus stop the drivers.
Everyone says it's simple but no one is willing to help me with this code.
This is my...
Hello,
Following your indications, I've decided to use this driver for my diy VFD:
Please help me with the following issues:
1.What form should have the PWM signal from pins 3,4 and 5 CONN_01X07 to power the 3-phase SINUSOIDAL motor?
2. If the temperature read by the NTC sensor located on the...
Hello, Is not it easier for arduino to generate 3 SPWM signals instead of 6? These drivers have built-in dead time? Would that be a better solution than the smith trigger option? Thanks
https://www.silabs.com/products/isolation/isolated-gate-drivers/si822x-3x-isolated-gate-drivers/device.si8234bb-is
Hi, you introduced me into a study that I only dream of VFD all night.
I found this code on the internet that promises to generate all 6 spwm signals.
Can you help me measure dead time and if it works to adjust it?
Thank you
// 3 phase PWM sine
// (c) 2016 C. Masenas
// Additional modifications...
I honestly have no idea how you make it bidirectional with just this type of controller, but I'm pretty sure you need zerro cross detection to make a dimmer that can control the motor speed.
Something like this will help you...
Do you say it will work with the scheme from post # 59?
The three phases that will power the motor will have a sinusoidal signal in this case?
Thank you
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I would like to use DC DC isolated converters for each mosfet driver.
But this is a fairly costly method - if you know...
post#57
In post#57 you said that the IGBT bridge would be commanded by a square signal that does not help me.
I want a sinusoidal signal inverter.
If I could manage myself, I would not ask for help
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I test with this code and my IR2113 IGBT driver and my 400V 900 rpm motor...
I'm waiting for you to come up with a functional circuit proposal.
Meanwhile, I've been thinking of using as a VESC command circuit that is open source and my power circuit based on the HCPL3120
https://github.com/vedderb/bldc-hardware
I think this story has begun to take another direction here - from proposing a functional VFD scheme to the way we educate our children.
I do not think it's dangerous for a 15-year-old child to play with such a circuit at 30V 5A for example.
I think it's more dangerous if a 15-year-old would...
Hello,
What do you think if I replace the comparators with nand gates and trigger smith gate driver? What do you think about this circuit? Isn't that gonna work? I mention that I want to make a VFD in the open loop without current sensors or hall sensors.
Thank you
As I told you earlier, I agree to follow your advice and change the command circuit. I would still keep the arduino and the low pass filter . Do you think you can help me with this? Do you think you can help me make a new command circuit based on arduino DDS and possibly another way to get the...
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