Power Integrations has been granted a patent for a motor drive system that aligns a motor to a desired position. The system includes high-side and low-side switches, a controller for phase current sensing, and an alignment sequence based on current changes. The system transitions to normal operation upon alignment completion. GlobalData’s report on Power Integrations gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Power Integrations, Quantum dot devices was a key innovation area identified from patents. Power Integrations's grant share as of May 2024 was 54%. Grant share is based on the ratio of number of grants to total number of patents.
Motor drive system with alignment sequence for motor control
A recently granted patent (Publication Number: US11996795B2) discloses a motor drive system designed to align a motor to a specific position before transitioning to normal operation. The system includes high-side and low-side switches that control the phase current of the motor, with a system controller initiating an alignment sequence based on a phase current sense signal. During alignment, the switches are controlled by an alignment duty ratio, and the system controller tracks the phase current to determine when to end the alignment sequence and begin normal operation. Additionally, the system controller can compare samples of the phase current to ensure proper alignment and minimize undesired motor responses.
Furthermore, the patent details a method for aligning a motor to a specific position, involving the initiation of an alignment sequence with controlled power switches to generate the phase current. The system monitors the phase current and the duration of the alignment sequence, ending it when a decrease in the phase current envelope is detected. This detection is based on tracking the maximum value of the phase current and comparing it to current samples. The method also includes adjusting the duty ratio of the power switches to influence the phase current envelope and ensure a smooth alignment process, ultimately resulting in a sinusoidal shape of the monitored phase current during alignment.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
