15-Minute Online "Lunch & Learn": Electric Power Testing - From Torque Ripple and NVH to Measuring Electric Power During Transients

Grab a cup of coffee, turn on the volume, and join our EPT experts during one of our lunch & learn meetings:

Condensed knowledge: 15 minute power sessions
Expert speakers in the electric power testing domain
Ask live questions and receive answers

About us: HBM provides the entire measurement chain for electrical power testing - from electrical machine testing to high voltage and complex inverter control testing in the automotive, ground vehicle, and aerospace industry as well as the manufacturing, production, and energy industries.

Our speakers: Mitch Marks and Rene Bastiaanssen, Business Development Managers Electric Power Testing at HBK - Hottinger, Brüel & Kjær. Click here to meet Mitch or to meet Rene on LinkedIn!

Part 1: Learning Materials

Part 1: What is Torque Ripple and Cogging Torque in Electric Motors

Recorded Live Session

This webinar will be a brief introduction to torque ripple and cogging torque in electric machines. It will cover the sources of torque ripple, the importance of torque ripple, and the needed measurement equipment.

Part 1: Introduction to Noise and Vibration in Electric Motors

Recorded Live Session

This webinar will introduce elements of electric motors and inverters that cause noise and vibration. This webinar will cover the basics of electric machines and how the construction and control contribute towards noise and vibration, plus methods of measurement and visualization of these phenomena.

Part 1: Introduction to Measuring Electric Power During Transients

Recorded Live Session

Electric motors have traditionally been used for industrial applications at a fixed speed (50/60hz) and instrumentation reflected that. Now that machines are being used for traction applications with variable speeds in cars, aircraft, and other applications, there is a need to understand how these machines perform in transients. This webinar will explore the need for testing during transients and instrumentation techniques that were not previously available.

Part 2: Learning Materials

Part 2: Measuring Torque Ripple in Electric Machines

Recorded Live Session

In this session, we are providing a brief introduction to the effects and analysis of torque ripple in electric machines. We will cover the measurement of torque ripple, frequency analysis of torque ripple, correlation of electric and mechanical signals, frequency analysis of torque signals and measurement considerations including bandwidth and accuracy.

Part 2: Electric Motor NVH Case Study and Analysis

Recorded Live Session

This webinar will expand on the previous webinar on noise and vibration in electric machines by showing a case study. By combining tests and creating a common language for testing between powertrain and NVH engineers will be able to be more productive and reduce time to market. This webinar will cover combined testing examples, combined analysis, and test configurations for NVH and powertrain testing in electric motors.

Part 2: Transient Power Testing Implementation and Examples

Recorded Live Session

Electric motors have traditionally been used for industrial applications at a fixed speed (50/60hz) and instrumentation reflected that. Now that machines are being used for traction applications with variable speeds in cars, aircraft, and other applications, there is a need to understand how these machines perform in transients. Together, we will discuss the need for testing during transients and instrumentation techniques that were not previously available.

Part 3: Learning Materials

Part 3: In 5 Steps to Your Ideal eDrive Test Setup

Recorded Live Session

In this session, we will take a look at an ideal setup of a test stand and also highlight the equipment needed to execute the tests properly. We will provide an overview of the parts of a dyno, take a look at the sensors and DAQ involved and give a brief overview of the software needed.

Part 3: Live Demo - Torque Ripple and Dynamic Power

Recorded Live Session

No Slides available

In this session, using a demo rig, we will look at the squiggly lines shown in the software and discuss some of the torque ripple topics on live signals. Furthermore we will show the dynamic power & cycle detect as well as the intersection of these two with efficiency.

Part 3: Measurement of a Torque Sensor Frequency Output

Recorded Live Session

In this session, we will look into how you can measure torque for full bandwidth. We will also cover pulse averaging, accuracy of averaging and do a quick tie into measurement uncertainty of the torque sensor.

Contact Our Expert Mitch Marks

If you have any questions concerning Electric Power Testing, we are here to support you.

Mitch Marks is among HBM's many experts in electric machine and drivetrain testing. He is a Business Developer for electrification at HBK - Hottinger, Brüel & Kjær with a Masters in electrical engineering. If you have any questions regarding our products or applications, please get in touch with Mitch.

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