| 摘要 |
An electric motor assembly 5, mud pulser 10 and a method for transmitting data. The electric motor assembly 5 includes an electric motor having a rotor and a stator that includes one or more windings A, B, C; one or more sensors on the stator and configured to determine an angular position of the rotor; and a motor control circuitry 300 configured to control a commutation of the electric motor based on signals received from the one or more sensors. The motor control circuitry is configured to determine a total angular rotation of the rotor based on a back emf voltage of the one or more windings and independent of the signals from the one or more sensors. |
