Motor controller
AssigneeGlobal Mixed-mode Technology Inc.
InventorChien-Lun Chu
Life of this patent
Estimating the term…
Abstract
A motor controller is configured to reduce the motor noise. The motor controller is used for driving a motor, where the motor has a motor coil and a rotor. The rotor is divided into four pole regions N1, S1, N2, and S2 to switch phases. The four pole regions have a manufacturing tolerance and the pole region N1 has a time interval T1. The motor controller comprises a switch circuit, a control unit, a phase detecting unit, and a current detecting unit. The switch circuit is configured to supply a driving current to the motor coil. Based on the manufacturing tolerance and the time interval T1, the time point to detect the driving current is set to be a proportional time PT before the phase switching, where PT/T1 is greater than the manufacturing tolerance.
Claims15
A motor controller configured to drive a motor, wherein the motor has a motor coil and a rotor, the rotor has a first pole region and a second pole region to switch phases, the first pole region and the second pole region have a manufacturing tolerance, the first pole region has a first time interval T1, and the motor controller comprises:
- a switch circuit, configured to supply a driving current to the motor coil;
- a control unit, configured to control the switch circuit;
- a phase detecting unit, configured to generate a phase signal to the controller;
- and
- a current detecting unit, configured to detect the driving current and generate a detecting signal to the controller, wherein a first time point Td1 to detect the driving current is determined based on the manufacturing tolerance, where Td1<T1.
A motor controller configured to drive a motor, wherein the motor has a motor coil and a rotor, the rotor has a first pole region, a second pole region, a third pole region, and a fourth pole region to switch phases, the first pole region, the second pole region, the third pole region, and the fourth pole region have a manufacturing tolerance, the first pole region has a first time interval T1, the second pole region has a second time interval T2, the third pole region has a third time interval T3, the fourth pole region has a fourth time interval T4, the motor coil has a first terminal and a second terminal, and the motor controller comprises:
- a switch circuit, configured to supply a driving current to the motor coil;
- a control unit, configured to control the switch circuit;
- a phase detecting unit, configured to generate a phase signal to the controller;
- and
- a current detecting unit, configured to detect the driving current and generate a detecting signal to the controller, wherein a first time point Td1 to detect the driving current is determined based on the manufacturing tolerance, where Td1<T1.
Dependencies are inferred from the claim text.