Variable frequency drive system
AssigneeHyperloop Technologies, Inc.
InventorJiaqi Liang
Life of this patent
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Abstract
A dynamic linear motor is controlled by determining a relative proximity of a moving rotor of the linear motor to a fixed stator segment of the linear motor using a current location of the moving rotor. A current driving characteristic of the linear motor at the current location of the moving rotor is determined. Settings for the fixed stator segment when the moving rotor reaches the fixed stator segment are identified based on the current driving characteristic. The fixed stator segment is driven based on the settings when the moving rotor reaches the fixed stator segment.
Claims9
A motor drive system for a linear motor, comprising:
- a plurality of low-voltage modules that each store energy;
- and
- a plurality of switches operable to connect the motor drive system to the linear motor to power the linear motor,
- wherein at least two of the plurality of low-voltage modules are connected in series and comprise medium-voltage motor drive, and provide power to the linear motor via a common switch,
- wherein the plurality of switches are operable to connect to different segments of the linear motor to selectively power the different segments of the linear motor,
- wherein the different segments of the linear motor comprise fixed stator segments of the linear motor,
- wherein each of the different segments of the linear motor is selectively powered as a moving rotor of the linear motor approaches, and is selectively unpowered as the moving rotor of the linear motor departs,
- wherein the linear motor is aligned in a tube through which a pod is driven electromagnetically, and
- wherein the moving rotor is carried by the pod.
Dependencies are inferred from the claim text.