Steppers position precisely if loads are stable and speeds stay below 1,000 rpm. Hybrid stepper motors combine the operating principles of variable reluctance with permanent-magnet stepper motors.

More specifically, permanent-magnet stepper motors include magnets on the rotor that align with the electromagnetic field moved by sequentially energizing and de-energizing stator coils.

The SonaSpeed’s simplex permanent magnet stepper motor is used in the actuator assembly of the LVM 3 for controlling the rocket engine’s liquid fuel and oxidizer mixture ratio. The Head of ...