Systems and methods for vibration and noise manipulation in switched reluctance machine drivetrains
AssigneeContinuous Solutions LLC
InventorsNir Vaks, Nyah Zarate, Xiaoqi Wang
Life of this patent
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Abstract
Systems and methods to manipulate the noise and vibration of a switched reluctance machine (SRM), capable of being implemented in a controller. By use of vibration sensors and a real-time optimizer, the noise and vibration profile of an SRM and associated load can be modified in order to meet multiple control objectives, such as torque ripple mitigation (TRM), harmonic spectrum shaping, and efficiency improvement. The systems and methods can be adapted to high power, high pole count, and high speed applications, and applications where electrical or mechanical imbalance exists.
Claims20
A method for mitigation of machine-induced vibration and noise in a switched reluctance machine drivetrain, the drivetrain including at least a switched reluctance machine rotor and a load mechanically attached to the rotor, comprising:
- driving the switched reluctance machine with a drive current supplied from a closed-loop controller;
- disposing a vibration sensor relative to the switched reluctance machine drivetrain so that the vibration sensor can measure machine-induced vibrations from the switched reluctance machine drivetrain in at least one axis;
- measuring the machine-induced vibrations with the vibration sensor;
- determining the corresponding angular position of the rotor;
- calculating by a real-time optimization module a modulation signal configured to modify the machine-induced vibrations from the measured machine-induced vibrations and rotor angular position by performing an adaptive gradient method analysis;
- and
- incorporating the modulation signal into the drive current by the controller.
A system for controlling a switched reluctance machine drivetrain to modify machine vibrations, comprising:
- a switched reluctance machine drivetrain comprised of a switched reluctance machine with a rotor and a load, wherein the rotor is mechanically attached to the load;
- a controller configured to drive the switched reluctance machine with a drive signal, the controller further comprising:
- a real-time optimization module;
- a torque estimator module;
- and
- a current synthesizer module;
- a vibration sensor configured and disposed to detect machine-induced vibrations from the switched reluctance machine drivetrain;
- and
- an angular position sensing means configured to detect the angular position of the rotor,
- wherein:
- the real-time optimization module is configured to receive inputs from the vibration sensor and angular position sensing means, determine from the inputs a modulation signal to modify the machine-induced vibrations, and
- the controller is configured to incorporate the modulation signal into the drive signal.
A controller for a switched reluctance machine, comprising:
- a torque command input;
- a current sensor configured to measure the phase currents across the switched reluctance machine;
- one or more vibration sensors configured to measure machine-induced vibrations from a switched reluctance machine drivetrain, the switched reluctance machine drivetrain further comprised of the switched reluctance machine and a load mechanically connected to the switched reluctance machine;
- an angular sensing means configured to detect the angular position of a rotor of the switched reluctance machine;
- a real-time optimization module, further comprising:
- a harmonic extraction module,
- a base current estimator,
- a phase advancement angle module,
- an electromechanical imbalance factor module, and
- an adaptive gradient and cost function module;
- a torque estimator module;
- a current synthesizer module;
- and
- a current/voltage drive inverter,
- wherein the adaptive gradient and cost function module calculates a modulation signal from the vibration sensor and angular sensing means signals to reduce the measured machine-induced vibration using an adaptive gradient method analysis.
Dependencies are inferred from the claim text.