This circuit is used to drive brushless DC- motors in a sensorless configuration via back-emf
detection and block commutation. The maximum speed is determined by the motor parameters
and the computation time on the microcontroller used, the solution has been tested up to 18.000 rpm.
The IR2301 are high voltage, high speed power MOSFET and IGBT drivers with independent high
and low side referenced output channels.
The delta connection equals the circuit below: