Motor device, wiper device, and motor control method
Number of patents in Portfolio can not be more than 2000
United States of America
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Jan 28, 2025
Grant Date -
Nov 23, 2023
app pub date -
Jul 21, 2022
filing date -
Jul 21, 2022
priority date (Note) -
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Abstract
A motor device includes a motor having three-phase windings; a rotation speed detector detecting a rotation speed of the motor; a drive signal generator controlling a duty ratio not to exceed a duty ratio upper limit value, and performing control for an energization angle of each phase and performing advance angle control shifting the phase from a reference position to generate a drive signal corresponding to the duty ratio; and an inverter supplying alternating current to the windings based on the drive signal. The drive signal generator includes an advance angle/energization angle controller changing the energization angle to 120 degrees or less while performing advance angle control when the duty ratio is equal to or greater than the duty ratio upper limit value and the rotation speed is equal to or less than a predetermined threshold value in a state where the energization angle is greater than 120 degrees.
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