Reverse brushless controller
Posted: Sat Jun 12, 2010 3:21 am
I have been throwing an idea arround on paper for an invertable spinner. However the disc spins down when it is upside down. So I have been looking into reversing the direction of the brushless controller, so this comes under an itelligent system. The lightest one i have found with this function avaliable on the market is the pheonix 25, which is far to big. Has anyone else seen anything smaller?
I have been looking into swapping two motor wires to reverse the direction after i have stopped the motor and starting it up again. I have been looking at using a mosfet H bridge to reverse the two motor wires. However i am concerned what happens when you put a reverse voltage onto a mosfet due to the diode between source and drain. I have thought of two options which might work. Either a H bridge of n channel mosfets with no integrated diodes. Or using a rectifier arround the mosfet so the voltage doesn't reverse during the pwm control. The last concern is the internal resistance of these fets reducing the power of the motor. Relays would be easy to use but would be far to heavy to use.
Has anyone got any ideas on swapping two of the wires to the brushless motor?
Thanks in advance
I have been looking into swapping two motor wires to reverse the direction after i have stopped the motor and starting it up again. I have been looking at using a mosfet H bridge to reverse the two motor wires. However i am concerned what happens when you put a reverse voltage onto a mosfet due to the diode between source and drain. I have thought of two options which might work. Either a H bridge of n channel mosfets with no integrated diodes. Or using a rectifier arround the mosfet so the voltage doesn't reverse during the pwm control. The last concern is the internal resistance of these fets reducing the power of the motor. Relays would be easy to use but would be far to heavy to use.
Has anyone got any ideas on swapping two of the wires to the brushless motor?
Thanks in advance