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US 7,432,682 B2Granted
Stepper motor stop and stalling detection method, and stop-detector-equipped stepper motor
AssigneeMoving Magnet Technologies
InventorsEric Rondot, Daniel Prudham
Life of this patent
Estimating the term…
Abstract
A stop-detection method intended for a multi-phase synchronous geared motor that is controlled in a stepping mode, which measures the sum of the currents circulating in each of the N phases of the geared motor. In the method the stop detection threshold is calculated in relation to the change in the sum of the currents.
Claims13
A method for detecting an end stop of a synchronous multi-phase gear motor operated in a stepped mode, the method comprising:
- measuring a sum of currents circulating in each of N phases of a gear motor;
- and
- calculating an end-stop detection threshold relative to evolution of the sum of the currents measured in said step of measuring.
A multi-phase gear motor provided with a stepper motor and an electronic circuit for operation in a micro-stepped mode, comprising:
- an end stop detector of a circuit that is configured to measure a total current consumed by N phases of a motor, and configured to detect the end stop based on the total current measurement.
Dependencies are inferred from the claim text.