Electric machine drive calibration, verification, and efficiency improvement
AssigneeTula eTechnology, Inc.
InventorsVijay Srinivasan, Benjamin Matthew Wolk, Elliott A. Ortiz-Soto, Shahaboddin Owlia, Xiaoping Cai, Kai Wan
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Abstract
Methods, systems, and devices for electric machine drive calibration, verification, and efficiency improvement are disclosed herein. One electric machine controller for calibration includes a processor and memory and instructions that are stored in the memory and executable by the processor to identify a vehicle and/or electric machine frequency response during operation of the vehicle and use the electronic machine and a dynamic motor drive converter to provide source excitations based on the identified frequency response.
Claims18
An electric machine controller in a vehicle, wherein the electric machine controller has a processor and memory and instructions that are stored in the memory and executable by the processor to:
- identify a vehicle and/or electric machine frequency response during operation of the vehicle including collecting measured noise and vibration sensor data using at least one on-board sensor in the vehicle;
- wherein the at least one on-board sensor in the vehicle is a microphone for Bluetooth communication by a vehicle occupant, a microphone for wireless communication by the vehicle occupant, a microphone for use by the vehicle occupant with an entertainment system, a microphone for use by the vehicle occupant with a navigation system, or an accelerometer for crash detection;
- and
- use the electric machine and a dynamic motor drive converter to choose a dynamic motor drive pulsing frequency based in part on the identified frequency response.
An electric machine controller in a vehicle, wherein the electric machine controller has a processor and memory and instructions that are stored in the memory and executable by the processor to:
- calibrate frequency selection or avoidance tables;
- wherein the calibration includes scaling at least one measured frequency response function for torque based on an ideal dynamic motor drive pulse height;
- estimate a number of noise, vibration, harshness (NVH) levels using on-board sensors at different locations on the vehicle for different pulsing frequencies and different levels of motor torque;
- wherein the at least one of the on-board sensors is a microphone for Bluetooth communication by a vehicle occupant, a microphone for wireless communication by the vehicle occupant, a microphone for use by the vehicle occupant with an entertainment system, a microphone for use by the vehicle occupant with a navigation system, or an accelerometer for crash detection;
- compare the estimated NVH levels against at least one calibratable threshold for each different location;
- determine which estimated NVH levels meet or exceed a threshold;
- and
- assuming that pulsing at lower frequencies is more efficient for dynamic motor drive operation, select a frequency of electric machine pulsing that is acceptable for NVH.
An electric machine controller in a vehicle, wherein the electric machine controller has a processor and memory and instructions that are stored in the memory and executable by the processor to:
- monitor operational NVH responses after initial calibration wherein initial calibration includes:
- calibrating frequency selection or avoidance tables;
- wherein the calibration includes scaling at least one measured frequency response function for torque based on an ideal dynamic motor drive pulse height;
- measure NVH operational responses using at least one on-board sensor in the vehicle comprising a microphone for Bluetooth communication by a vehicle occupant, a microphone for wireless communication by the vehicle occupant, a microphone for use by the vehicle occupant with an entertainment system, a microphone for use by the vehicle occupant with a navigation system, or an accelerometer for crash detection along with one or more dynamic motor drive or electric motor parameters;
- and
- adjust a frequency selection calibration based on the measured NVH operational response at different speeds or torque loads.
Dependencies are inferred from the claim text.