Hello everyone!
I have been looking for a high power motor controller to use in my projects. It's not the actual cost of a complete controller that gave me the idea of making my own. All tough the complete controllers don't cost much money, I think many of them are a bit overpriced, and I love the idea of a schematic, PCB layout and the overall design of a circuit being open source. When finished, this project will be available to others as a kit, a design (free, of course), just the PCB or (maybe) pre-assembled.
I hope you will help me on this one. As the parts that may be sold will probably not even be sold be my, I hope no-one thinks I am using you to earn a profit on this!
Explaining what I want:
(Generic) A versatile high power DC motor controller. Power to be controlled by potmeter mounted on either PCB or maybe handlebars of a kick-scooter or similar, connected by wires.
(Detail) Analog voltage from pot is converted by a uC ADC to a 0-100% PWM which is amplified by mosfets through an h-bridge controller.
Hopefully I can ask both generic and detailed questions, and anyone is of course welcome to suggest anything for this circuit, even though it may involve a drastic change to the design. Hopefully we will soon be on the track of a very specific design that just needs improvements. The goal is to design an easy-to-understand and as-cheap-as-possible design.
I have made a sketch that will make the fundamentals of my idea. And here goes my first questions!
- What could a ~maximum achievable power rating of a product like this be?
- Is it preferable to use another set of five transistors to fully switch on the h-bridge fets, so I don't have to be limited to the logic level fets?
I am aware that designs like this is widely available all over the internet, but I also want this to be a sort of learning project for my self!
Thank you so much, and please comment on anything you want. Both to my intentions of this project, and the design it self.
A link to the schematic picture, which will soon be scaled down to fit the forum: http://ploader.net/files/60476c03c03566437a4aed01d008dd32.bmp
I have been looking for a high power motor controller to use in my projects. It's not the actual cost of a complete controller that gave me the idea of making my own. All tough the complete controllers don't cost much money, I think many of them are a bit overpriced, and I love the idea of a schematic, PCB layout and the overall design of a circuit being open source. When finished, this project will be available to others as a kit, a design (free, of course), just the PCB or (maybe) pre-assembled.
I hope you will help me on this one. As the parts that may be sold will probably not even be sold be my, I hope no-one thinks I am using you to earn a profit on this!
Explaining what I want:
(Generic) A versatile high power DC motor controller. Power to be controlled by potmeter mounted on either PCB or maybe handlebars of a kick-scooter or similar, connected by wires.
(Detail) Analog voltage from pot is converted by a uC ADC to a 0-100% PWM which is amplified by mosfets through an h-bridge controller.
Hopefully I can ask both generic and detailed questions, and anyone is of course welcome to suggest anything for this circuit, even though it may involve a drastic change to the design. Hopefully we will soon be on the track of a very specific design that just needs improvements. The goal is to design an easy-to-understand and as-cheap-as-possible design.
I have made a sketch that will make the fundamentals of my idea. And here goes my first questions!
- What could a ~maximum achievable power rating of a product like this be?
- Is it preferable to use another set of five transistors to fully switch on the h-bridge fets, so I don't have to be limited to the logic level fets?
I am aware that designs like this is widely available all over the internet, but I also want this to be a sort of learning project for my self!
Thank you so much, and please comment on anything you want. Both to my intentions of this project, and the design it self.
A link to the schematic picture, which will soon be scaled down to fit the forum: http://ploader.net/files/60476c03c03566437a4aed01d008dd32.bmp
