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US 9,712,033 B2Granted
System and method for stabilizing a voice coil
AssigneeShenzhen Mindray Bio-Medical Electronics Co., Ltd.
InventorsMathias Eklund, Göran Cewers
Life of this patent
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Abstract
A device or method for stabilizing a voice coil is disclosed. The device comprises a voice coil for providing a motive force, and means for measuring a signal from said voice coil related to a motional electromotive force. The device further comprises a unit for controlling an amplification of said signal to create a force in said voice coil in a direction of said motional electromotive force.
Claims16
A device for stabilizing a voice coil that controls a respiration valve in a medical device, comprising:
- a voice coil for providing a motive force;
- means for measuring an error signal from said voice coil related to a motional electromotive force, said error signal being based on a difference between a measured signal and an estimated or calculated steady-state signal;
- and
- a unit for controlling an amplification of said signal to create and induce an adjustable damping force in said voice coil in a direction of said motional electromotive force.
1 more element
A method of stabilizing a voice coil, comprising:
- measuring an error signal related to a motional electromotive force of a voice coil, said error signal being based on a difference between a measured signal and an estimated or calculated signal in steady state;
- controlling an amplification of said signal to create and induce an adjustable damping force in said voice coil in a direction of said motional electromotive force.
Dependencies are inferred from the claim text.