Invention Grant
- Patent Title: Method of operating an electric motor, corresponding device and hard disk drive
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Application No.: US18300806Application Date: 2023-04-14
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Publication No.: US12190909B2Publication Date: 2025-01-07
- Inventor: Ezio Galbiati , Maurizio Ricci
- Applicant: STMicroelectronics S.r.l.
- Applicant Address: IT Agrate Brianza
- Assignee: STMicroelectronics S.r.l.
- Current Assignee: STMicroelectronics S.r.l.
- Current Assignee Address: IT Agrate Brianza
- Agency: Slater Matsil, LLP
- Priority: IT102022000008750 20220502
- Main IPC: G11B19/20
- IPC: G11B19/20

Abstract:
A method includes coupling an electric motor in a hard disk drive to a set of driver circuits. Each driver circuit includes a high-side switch and a low-side switch. The high-side switch has a high-side current flow path between a supply node coupled to a supply voltage and a switching node coupled to a winding of the electric motor. The low-side switch has a low-side current flow path between the switching node and ground. Respective conduction currents are generated through the low-side current flow paths, in response to a command to reduce the motor speed by coupling a drive voltage to the control terminals of the low-side switches. An intensity of at least one of the respective conduction currents is sensed. In response to the sensed current intensity exceeding a current intensity threshold, the control terminals of the low-side switches are coupled to respective ones of the switching nodes.
Public/Granted literature
- US20230352050A1 METHOD OF OPERATING AN ELECTRIC MOTOR, CORRESPONDING DEVICE AND HARD DISK DRIVE Public/Granted day:2023-11-02
Information query
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