Method of reducing sound from light fixture with stepper motors
AssigneeHarman Professional Denmark ApS
InventorCarsten Dalsgaard
Life of this patent
Estimating the term…
Abstract
A light fixture including a stepper motor comprising a stepper motor stator and a stepper motor rotor. The stepper motor rotor includes a stepper motor axle and is rotatable around a stepper motor axis. The stepper motor is connected to a movable object and is configured to move the movable object in relation to a reference point. A damping mass is attached to the stepper motor axle. The damping mass has a rotational inertia in relation to the stepper motor axis which is at least as large as the rotational inertia of the stepper motor rotor in relation to the stepper motor axis. A method of damping the sound generated by a light fixture comprising a step of attaching a damping mass to a stepper motor axle.
Claims20
A light fixture comprising:
- at least one light source generating a light beam;
- and
- a stepper motor including a stepper motor stator and a stepper motor rotor, where the stepper motor rotor comprises a stepper motor axle and is rotatable around a stepper motor axis;
- the stepper motor is connected to a movable object and is configured to move the movable object in relation to a reference point to modify the light beam as generated by the at least one light source;
- wherein a damping mass is attached to the stepper motor axle, the damping mass having a rotational inertia in relation to the stepper motor axis which is at least as large as the rotational inertia of the stepper motor rotor in relation to the stepper motor axis.
A method of damping sound generated by a light fixture comprising:
- generating a light beam with at least one light source;
- moving a moveable object with a stepper motor to modify the light beam as generated by the at least one light source;
- where the stepper motor includes a stepper motor stator and a stepper motor rotor, and where the stepper motor rotor comprises a stepper motor axle and is rotatable around a stepper motor axis;
- and
- attaching a damping mass to the stepper motor axle where the damping mass has a rotational inertia in relation to the stepper motor axis which is at least as large as the rotational inertia of the stepper motor rotor in relation to the stepper motor axis.
A light fixture comprising:
- at least one light source generating a light beam;
- and
- a stepper motor including a stepper motor rotor, where the stepper motor rotor comprises a stepper motor axle and is rotatable around a stepper motor axis;
- the stepper motor is connected to a movable object and is configured to move the movable object in relation to a reference point to modify the light beam as generated by the at least one light source;
- wherein a damping mass is attached to the stepper motor axle, the damping mass having a rotational inertia in relation to the stepper motor axis which is at least as large as the rotational inertia of the stepper motor rotor in relation to the stepper motor axis.
Dependencies are inferred from the claim text.