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The active vector effects on torque and flux linkage are different in interior permanent magnet synchronous motor (IPMSM) systems at different times under direct torque control (DTC). These different effects may cause overcompensation or undercompensation to torque and flux linkage leading to large torque and flux linkage ripples in the IPMSM DTC systems. A novel duty ratio modulation strategy for...
This paper focuses on a structural suppression method of modal coupling error in micromachined gyroscopes by UV laser trimming. A micromachined gyroscope which had a slanted suspension beam was adopted as an example in the experiment. The formation mechanism of modal coupling error and operation principle of structural suppression method were proposed. Laser trimming method was implemented on the...
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