Cell telemetry sample and hold amplifier
First Claim
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1. A cell telemetry sample and hold amplifier system comprising:
- a telemetry sampling transformer comprising a primary winding operable to couple to a battery and a secondary winding operable to couple to a sampling capacitor and output a measured telemetry voltage;
a pulse driven switch coupled to the primary winding of the telemetry sampling transformer;
a voltage clamp mechanism coupled to a winding of the telemetry sampling transformer and operable to balance volt-seconds applied to the winding of the telemetry sampling transformer and force an average magnetizing current in the telemetry sampling transformer to about zero amperes;
driver means coupled to the pulse driven switch and the voltage clamp mechanism, and operable to drive the pulse driven switch and the voltage clamp mechanism;
a synchronized sampling switch coupled to the secondary winding of the telemetry sampling transformer and operable to electrically couple the secondary winding of the telemetry sampling transformer to the sampling capacitor; and
drive circuits coupled to the pulse driven switch, the voltage clamp mechanism, and the synchronized sampling switch, and operable to simultaneously turn on the pulse driven switch and the synchronized sampling switch while turning the voltage clamp mechanism off.
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Abstract
A system and methods for cell telemetry are disclosed. An average magnetizing current in a sampling transformer is forced to about zero amperes by balancing volt-seconds using a voltage clamp mechanism. Furthermore, a pulse driven switch and a synchronized sampling switch are activated, and substantially simultaneously the voltage clamp mechanism deactivated.
9 Citations
20 Claims
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1. A cell telemetry sample and hold amplifier system comprising:
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a telemetry sampling transformer comprising a primary winding operable to couple to a battery and a secondary winding operable to couple to a sampling capacitor and output a measured telemetry voltage; a pulse driven switch coupled to the primary winding of the telemetry sampling transformer; a voltage clamp mechanism coupled to a winding of the telemetry sampling transformer and operable to balance volt-seconds applied to the winding of the telemetry sampling transformer and force an average magnetizing current in the telemetry sampling transformer to about zero amperes; driver means coupled to the pulse driven switch and the voltage clamp mechanism, and operable to drive the pulse driven switch and the voltage clamp mechanism; a synchronized sampling switch coupled to the secondary winding of the telemetry sampling transformer and operable to electrically couple the secondary winding of the telemetry sampling transformer to the sampling capacitor; and drive circuits coupled to the pulse driven switch, the voltage clamp mechanism, and the synchronized sampling switch, and operable to simultaneously turn on the pulse driven switch and the synchronized sampling switch while turning the voltage clamp mechanism off. - View Dependent Claims (2, 3, 4, 5)
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6. A method for cell telemetry, the method comprising:
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forcing an average magnetizing current in a telemetry sampling transformer to about zero amperes by balancing volt-seconds applied to a winding of the telemetry sampling transformer using a voltage clamp mechanism; and activating a pulse driven switch and a synchronized sampling switch, and simultaneously deactivating the voltage clamp mechanism; and outputting a measured telemetry voltage from the telemetry sampling transformer. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for using a cell telemetry sample and hold amplifier system, the method comprising:
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receiving an electric current from a battery cell at an input of a telemetry sampling transformer; forcing an average magnetizing current in the telemetry sampling transformer to be about zero amperes by balancing volt-seconds applied to a winding of the telemetry sampling transformer using a voltage clamp mechanism; and activating a pulse driven switch and a synchronized sampling switch, and simultaneously deactivating the voltage clamp mechanism; and outputting a measured telemetry voltage from the telemetry sampling transformer. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification
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Current AssigneeThe Boeing Co.
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Original AssigneeThe Boeing Co.
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InventorsMartinelli, Robert Matthew
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Primary Examiner(s)DIAO, M BAYE
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Application NumberUS12/942,022Publication NumberTime in Patent Office1,176 DaysField of Search320/118, 340/870.07, 324/433US Class Current324/433CPC Class CodesG01R 19/2503 for measuring voltage only,...G01R 31/3648 comprising digital calculat...G01R 31/3835 involving only voltage meas...G01R 31/396 Acquisition or processing o...
