Electromagnetic damping mechanism for force motor
First Claim
1. A force motor comprising a movable drive frame, a drive coil and damping coil attached to said drive frame, fixed magnetic field means disposed about said drive frame, a signal current supplied to said drive coil for causing movement of said drive frame, a first static coil connected to said magnetic field means adjacent said drive coil for offsetting the magnetic flux induced in said drive coil when said drive coil is supplied with the signal current, and a second static coil connected to said magnetic field means adjacent said damping coil for offsetting the magnetic flux induced in said damping coil when said drive coil is supplied with the signal current.
0 Assignments
0 Petitions
Accused Products
Abstract
An electromagnetic damping mechanism for a force motor comprising a drive coil, a damping coil, and static coils located about the drive and damping coils to offset the self-induction occurring in the two coils, so that a voltage proportional to the velocity of motion can be induced in the damping coil.
-
Citations
6 Claims
- 1. A force motor comprising a movable drive frame, a drive coil and damping coil attached to said drive frame, fixed magnetic field means disposed about said drive frame, a signal current supplied to said drive coil for causing movement of said drive frame, a first static coil connected to said magnetic field means adjacent said drive coil for offsetting the magnetic flux induced in said drive coil when said drive coil is supplied with the signal current, and a second static coil connected to said magnetic field means adjacent said damping coil for offsetting the magnetic flux induced in said damping coil when said drive coil is supplied with the signal current.
-
6. A force motor comprising a fixed magnetic field means including a central pole piece, a drive frame movable about said pole piece, first and second annular static coils disposed on said pole piece, and annular drive and damping coils connected to said movable drive frame disposed radially outwardly from said first and second static coils, said first static coil being electrically connected to said drive coil and said second static coil being electrically connected to said damping coil, and a current signal is supplied to said drive coil for moving said drive frame and inducing a voltage in said damping coil whereby a voltage induced in said first and second static coils counteracts the voltage induced in the drive and damping coils.
Specification