Position-controlled electromagnetic assembly
First Claim
1. An electromagnetic assembly, comprising:
- a housing;
an electromagnetic device having at least one end enclosed by said housing and having its longitudinal axis oriented along a first orthogonal axis with respect to said housing;
mounting means pivotally mounting said electromagnetic device to said housing permitting pivotal movement of said electromagnetic device about second and third orthogonal axes with respect to the housing, and preventing rotary movement of said electromagnetic device about said first longitudinal axis;
a magnetic body secured to said electromagnetic device at the end thereof enclosed by said housing and producing a magnetic field coaxial with said first orthogonal axis;
first coil means secured to said housing so as to be magnetically coupled to said magnetic body and oriented such that current through said first coil means produces a magnetic field along said second orthogonal axis;
second coil means secured to said housing so as to be magnetically coupled to said magnetic body and oriented such that current through the second coil means produces a magnetic field along said third orthogonal axis; and
a current source for applying electrical current to said first and second coil means such that the magnetic fields produced thereby, interacting with the magnetic field produced by said magnetic body, produce a torque controlling the position of said electromagnetic device with respect to said second and third orthogonal axes;
said current source applying the current to said first and second coil means in pulses having pulse widths corresponding to the torque to be applied to the electromagnetic device.
3 Assignments
0 Petitions
Accused Products
Abstract
An electromagnetic assembly includes a gimbal pivotally mounting an electromagnetic device to a housing, a magnetic body secured to the electromagnetic device producing a magnetic field coaxial with a first orthogonal axis; coils secured to the housing so as to be magnetically coupled to the magnetic body and oriented such that current through them produces a magnetic field along second and third orthogonal axes, respectively; and a current source for applying electrical current to the coils such that the magnetic fields produced thereby, interacting with the magnetic field produced by the magnetic body, produce a torque controlling the position of the electromagnetic device with respect to the second and third orthogonal axes.
-
Citations
13 Claims
-
1. An electromagnetic assembly, comprising:
- a housing;
an electromagnetic device having at least one end enclosed by said housing and having its longitudinal axis oriented along a first orthogonal axis with respect to said housing;
mounting means pivotally mounting said electromagnetic device to said housing permitting pivotal movement of said electromagnetic device about second and third orthogonal axes with respect to the housing, and preventing rotary movement of said electromagnetic device about said first longitudinal axis;
a magnetic body secured to said electromagnetic device at the end thereof enclosed by said housing and producing a magnetic field coaxial with said first orthogonal axis;
first coil means secured to said housing so as to be magnetically coupled to said magnetic body and oriented such that current through said first coil means produces a magnetic field along said second orthogonal axis;
second coil means secured to said housing so as to be magnetically coupled to said magnetic body and oriented such that current through the second coil means produces a magnetic field along said third orthogonal axis; and
a current source for applying electrical current to said first and second coil means such that the magnetic fields produced thereby, interacting with the magnetic field produced by said magnetic body, produce a torque controlling the position of said electromagnetic device with respect to said second and third orthogonal axes;
said current source applying the current to said first and second coil means in pulses having pulse widths corresponding to the torque to be applied to the electromagnetic device. - View Dependent Claims (2, 3, 4, 5, 8)
- a housing;
-
6. An electromagnetic assembly, comprising:
- a housing;
an electromagnetic device having at least one end enclosed by said housing and having its longitudinal axis oriented along a first orthogonal axis with respect to said housing;
mounting means pivotally mounting said electromagnetic device to said housing permitting pivotal movement of said electromagnetic device about second and third orthogonal axes with respect to the housing, and preventing rotary movement of said electromagnetic device about said first longitudinal axis;
a magnetic body secured to said electromagnetic device at the end thereof enclosed by said housing and producing a magnetic field coaxial with said first orthogonal axis;
first coil means secured to said housing so as to be magnetically coupled to said magnetic body and oriented such that current through said first coil means produces a magnetic field along said second orthogonal axis;
second coil means secured to said housing so as to be magnetically coupled to said magnetic body and oriented such that current through the second coil means produces a magnetic field along said third orthogonal axis; and
a current source for applying electrical current to said first and second coil means such that the magnetic fields produced thereby, interacting with the magnetic field produced by said magnetic body, produce a torque controlling the position of said electromagnetic device with respect to said second and third orthogonal axes;
said assembly further including means for applying a current to said two pairs of coils at a higher frequency than that applied to the coils for producing the torque controlling the position of the electromagnetic device, and means for measuring the voltage difference between each pair of coils to thereby provide a measurement of the angular position of the electromagnetic device with respect to said second and third orthogonal axes. - View Dependent Claims (7)
- a housing;
-
9. An electromagnetic assembly, comprising:
-
a housing; an optic device having at least one end enclosed by said housing and including an optic sensor having an optic axis oriented along a first orthogonal axis with respect to said housing; a gimbal means pivotally mounting said optic device to said housing permitting only pivotal movement of said electromagnetic device about second and third orthogonal axes with respect to the housing, and preventing rotary movement of said electromagnetic device about said first longitudinal axis; a magnetic body secured to said optic device and producing a magnetic field coaxial with said first orthogonal axis; first coil means secured to said housing axially spaced from said magnetic body so as to be magnetically coupled to said magnetic body and oriented such that current through said first coil means produces a magnetic field along said second orthogonal axis; second coil means secured to said housing also axially spaced from said magnetic body so as to be magnetically coupled to said magnetic body and oriented such that current through the second coil means produces a magnetic field along said third orthogonal axis; and a current source for applying electrical current to said first and second coil means such that the magnetic fields produced thereby, interacting with the magnetic field produced by said magnetic body, produce a torque controlling the position of said optic device with respect to said second and third orthogonal axes; said current source applying the current to said first and second coil means in pulses having pulse widths corresponding to the torque to be applied to the electromagnetic device. - View Dependent Claims (10, 11, 12, 13)
-
Specification