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US 10,305,403 B2Granted
Dynamic motor drive for battery operated devices
AssigneeRosemount Inc.
InventorsEric Russell Lovegren, Richard Louis Nelson
Life of this patent
Estimating the term…
Abstract
A battery powered device includes a battery and a motor controller that is coupled to the battery. A motor is operably coupled to the motor controller. The motor controller is configured to detect an amount of available power from the battery and engage the motor based on the amount of available power.
Claims13
A process variable measurement device comprising:
- a visual indicator configured to indicate a process variable measurement output;
- a battery;
- a motor controller coupled to the battery;
- a motor operably coupled to the visual indicator and electrically coupled to the motor controller, and
- wherein the motor controller is configured to detect an amount of available power from the battery and engage the motor based on the amount of available power.
2 more elements
A method of dynamically controlling a motor for a measuring device, comprising:
- detecting an amount of available power from a battery by using a power detection component;
- analyzing the amount of available power to determine whether there is a sufficient amount of power to engage a motor;
- coupling a bulk capacitance component to the motor controller wherein the bulk capacitance component is configured to store energy received from the battery;
- wherein the motor controller is configured to use the stored energy in the bulk capacitance component to move the motor a finite amount;
- assessing the position of the motor to determine whether the motor is at a desired position;
- and
- determining that the motor is not at the desired position and, in response, generating instructions with the motor controller, wherein the instructions instruct a motor control component to move the motor a subsequent finite amount to indicate a process variable.
4 more elements
Dependencies are inferred from the claim text.