A method of controlling a motor of an electric projectile propulsion device performed by a controller (120) comprising a microcontroller (210) and a trigger sensor (121) connected thereto adapted to start the motor (200) in response to a displacement of a trigger (130), according to the invention comprises a magnetic element (132) coupled to the trigger, and the trigger sensor (121) is a magnetic field sensor having at least two non-parallel measurement axes (x,y,z) configured to sense the position of the magnetic element (132) along the at least two axes (x,y,z). The position (r) of the trigger (130) is determined on the basis of a measurement carried out along these at least two axes and a comparison of the readout (pcx, pcy, pcz) with reference data stored in memory (212) of the microcontroller (210). A shot is fired when a predefined condition is met.
In a controller (120) of a motor (200) of an electric projectile propulsion device comprising a microcontroller (210) provided with memory (212) and a trigger position sensor (121) connected to the microcontroller, according to the invention the trigger position sensor (121) is a multi-axial magnetic field sensor having at least two non-parallel axes, and the microcontroller (210) is adapted to perform the method according to the invention.
The electric projectile propulsion device according to the invention is provided with the controller according to the invention, and the computer program product according to the invention comprises instructions executed by the microcontroller of the motor controller causing the method according to the invention to be performed.