Flux-mnemonic permanent magnet synchronous machine and magnetizing a flux-mnemonic permanent magnet synchronous machine
AssigneeJacobi Motors, LLC
InventorsNicolaus Radford, Mohammadreza Barzegaranbaboli, Ahmed Morsy
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Abstract
A method of changing a magnetic flux density in an air gap between a stator and a rotor in a real-time flux-mnemonic permanent magnet synchronous machine comprising permanent magnets, the method comprising applying at least one current pulse to adjust a magnetic operating point of the magnets, wherein the at least one current pulse has a duration of less than 3 ms. For applying the at least one current pulses, the method comprises consecutively applying a plurality of primitive pulses.
Claims12
A method of operating a flux-mnemonic permanent magnet synchronous machine (FMPMSM), the FMPMSM comprising:
- an annular stator having a winding;
- a rotor disposed with a stator, the rotor comprising:
- at least two permanent magnets, each of the permanent magnets having two poles normal to an air gap between the stator and rotor, the air gap having a nullified flux, both permanent magnets comprising a single magnet type with a coercivity less than 2000 Oe;
- and
- one or more flux adjusters adjacent to one or more poles of at least one of the permanent magnets;
- and
- a power inverter for dispensing at least one current pulse, wherein the power inverter has a microcontroller;
- the method comprising:
- realizing a first valued operational parameter by applying at least a first current pulse from the inverter to set a magnetic flux linkage between the rotor and stator;
- and
- realizing a second valued operational parameter by applying at least a second current pulse to adjust the magnetic flux linkage to a magnetization state.
A method of operating a flux-mnemonic permanent magnet synchronous machine (FMPMSM), the FMPMSM comprising:
- an annular stator having a winding
- a rotor disposed concentric with a stator, the rotor comprising:
- at least two circumferentially magnetized adjustable permanent magnets, each of the permanent magnets having two poles normal to an air gap between the stator and rotor, the air gap having a nullified flux, both permanent magnets comprising a single magnet type with a coercivity less than 2000 Oe;
- and
- a flux barrier between the poles of each of the permanent magnets;
- and
- power inverter for dispensing an excitation current and at least one current pulse, the inverter having a microcontroller;
- the method comprising:
- selecting a first valued operational parameter;
- specifying a range for the first valued operational parameter;
- applying at least a first current pulse from the power inverter to set a magnetic flux linkage between the rotor and stator to achieve the first valued operational parameter;
- selecting a second valued operational parameter;
- applying at least a second current pulse from the power inverter to adjust the magnetic flux linkage to a magnetization state corresponding to the second valued operational parameter;
- wherein a difference between the first and second valued operational parameters is within the range, and
- wherein the at least first and second current pulses comprise a plurality of primitive pulses each having a duration of less than or equal to 2 ms.
A method of changing a magnetic flux density in an air gap between a stator and a rotor in a real-time flux-mnemonic permanent magnet synchronous machine comprising at least two permanent magnets and an air gap, the air gap having a nullified flux, the at least two permanent magnets both comprising a single magnet type with a coercivity less than 2000 Oe, the method comprising applying at least one current pulse to adjust a magnetic operating point of the magnets, wherein the at least one current pulse has a duration of less than 3 ms.
A method of regulating magnetic polarization of permanent magnets in a real-time flux-mnemonic permanent magnet synchronous machine, the permanent magnets comprising at least two permanent magnets having an air gap, the air gap having a nullified flux, both comprising a single magnet type with a coercivity less than 2000 Oe, the method comprising the step of:
- using at least one current pulse having a duration of less than 3 ms.
Dependencies are inferred from the claim text.