RC08Brushless
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In 2008 RoboCup switched to brushless DC motors. While brushless motors are smaller and far more efficient than brushed motors the commutation normally performed inside a brushed DC motor will need to be done externally using some control circuitry. There are two main parts to our brushless motor controller solution; the controller which uses sensors on the motor to gate signals to one of three coils, and the half-bridge motor drivers which actually drive the coils. There are two design paths: one with a special purpose controller, and one with a CPLD as the controller. On this page you will find information about both. For information on the motors or motor control software please see their respective pages.
Contents
Task
- [ ] Finalize on a DSC
- [ ] Choose Half-Bridge Drivers
- [ ] Set-up test-bed
- [ ] Build prototype system
- [ ] Choose CPLD
- [ ] Choose MOSFET Drivers
- [ ] Build 2nd prototype
- [ ] Choose final solution
Specifications
- We are using the same batteries so it has to be a 9V system
- A decent transient response (This will be a function of hardware and software)
- 6 MOSFETs per motor and the ability to control each
- Braking is not a requirement but would be nice (We could just as easily do it software)
- High Impedance OFF state
- Ability to operate in the >20kHz
Schematics
Schematics
Parts
DSC
CPLDS
Half-Bridges
MOSFET Drivers
Articles
Links