Methods and apparatus for estimating a torque angle of a synchronous electric motor
AssigneeABIOMED, Inc.
InventorHisham Hafez
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for determining a torque angle for a synchronous electric motor of a mechanical circulatory support device are provided. The method includes receiving a voltage signal representing a voltage induced in a winding of the synchronous electric motor during operation of the synchronous electric motor, determining a first back electro-motive force (bEMF) value of the voltage signal within at least one time window during which the winding is not energized, determining a torque angle for the synchronous electric motor based, at least in part, on the first bEMF value, and outputting an indication of the torque angle.
Claims20
A mechanical circulatory support device, comprising:
- a rotor;
- a synchronous electric motor coupled to the rotor;
- a drive circuit configured to drive operation of the synchronous electric motor to rotate the rotor in a pulsatile condition;
- and
- at least one hardware processor configured to:
- receive a voltage signal representing a voltage induced in a winding of the synchronous electric motor during operation of the synchronous electric motor;
- determine a first back electro-motive force (bEMF) value of the voltage signal within at least one time window during which the winding is not energized;
- determine a torque angle for the synchronous electric motor based, at least in part, on the first bEMF value;
- and
- control an operation of the mechanical circulatory support device based, at least in part, on the torque angle.
A method of determining a torque angle for a synchronous electric motor, the method comprising:
- receiving a voltage signal representing a voltage induced in a winding of the synchronous electric motor during operation of the synchronous electric motor;
- determining a first back electro-motive force (bEMF) value of the voltage signal within at least one time window during which the winding is not energized;
- determining a torque angle for the synchronous electric motor based, at least in part, on the first bEMF value;
- and
- outputting an indication of the torque angle.
Dependencies are inferred from the claim text.