Articles, Blog Posts & Tech Notes on Electric Power Testing

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Blog Posts

5 Tips for Selecting the Right Power Analyzer

Power analysers are multi-functional devices designed to measure the power flow in electrical systems. Although these sophisticated instruments are used in many applications and industries, there is no universal solution to every power measurement challenge. Find out what to consider when selecting a power analyzer that fits your application needs.

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Blogpost: An Introduction to Electric Power Testing

Electric power testing gives in-depth analysis into the behaviour of the inverter, the motor and electric drive train. It can be quite complex and requires a real-time power analyser for high channel counts, dynamic load changes, raw data acquisition and advanced analysis. Electrical motor and inverter testing can be found in automotive, transportation, railways, aerospace, industrial, wind energy and also in power generation. Typical application areas are electric ship motor, electric fork lifter, wind energy generator, electric or hybrid car, high speed train, high-performance pumps, electric drive in Airbus A320, industrial VF inverter, multiphase AC industrial motor and much more.

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What is a Power Analyzer?

A power analyzer is used to measure the flow of power (w) in an electrical system. This refers to the rate of electrical transferral between a power source and a sink, hence the alternative expression of power as energy per second (J/s). Measuring power flow is a critical yet rudimentary process that can be carried out with consummate ease using a standard power analyzer. More advanced systems acquire electrical signals and carry out integrated calculations for additional, complex analysis.

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White Papers

Measuring Torque Ripple And Its Effects On Electric Power And Noise And Vibration

The electric motor has a very desirable torque speed curve because it can not only produce max torque at 0 speed, but across a wide range of speeds. While this ability creates new opportunities with the electric motor, it also creates some new challenges in comparison to internal combustion engines. One of these challenges is torque ripple, which has several implications including control, power output, noise, vibration, and durability. Torque ripple can be described as the variance of output torque as the motor rotates. This white paper will focus on the measurement of these signals and their implications for noise and vibration. The paper will also include examples from a couple of case studies which demonstrate the impact of torque ripple and its effects on NVH.

Challenges in Testing Electric and More Electric Aircraft Motor and Inverters

The HBM eDrive power analyzer has unique features which make it an ideal measurement system for developing and validating electric aircraft powertrain. The eDrive solution simplifies testing complexity, allows users to test more quickly and gives a high level of traceability to tests. It does this by recording continuous data for large numbers of electrical and mechanical channels, then processes the data in real time to conduct power and efficiency calculations.

Dynamic Motor Power Measurement Enables In-Vehicle Testing of EVs

In-vehicle testing provides engineers with a method to benchmark competitors’ vehicles, calibrate drivetrains, and validate the performance of the product. In the emerging electric vehicle market, electrical power measurements on motors and related power conversion circuitry are becoming necessary to perform an evaluation of a vehicle. Mobile power measurement was previously difficult due to the dynamic nature of the vehicle speed. However, unique features provided in HBM’s eDrive, a system for testing electric machines and drives, make mobile electrical power measurements possible in real-world operating environments

Measuring the Parameters of a Transformer Equivalent Circuit Diagram

Used in many different applications, the transformer is one of the most important components in alternating current technology. It is used in electrical energy technology to transform between different voltage levels. To ensure efficient transmission of energy in this case, good efficiency and optimum utilization are required.

Qualification and Verification of High Power Battery Systems

Before a traction battery is introduced in the market, a qualification and verification of those systems is inevitable. A suitable test bench has to cover a high voltage and current range as well as a high dynamic and it should be able to execute the necessary tests as realistically as possible and in an application-oriented manner.

Calculating Power Quantities with Perception Software

Accurate and highly dynamic power measurements are required for assessing and testing electrical drives in industrial applications, and for hybrid and electric vehicles. This article considers the most important power values, along with some examples.

Efficiency and Loss Mapping of AC Motors

Recently electrical machines have become an important topic in many industries including power generation, heating/cooling, transportation and home appliances. With increases in efficiency standards and the increase in battery powered devices, the motor efficiency has become an important topic.

Getting the Back Emf Voltage Constant of Permanent Magnet Motors with Just One Lap Wrist Using

The parameter identification of permanent magnet motors is needed when a new motor prototype must be quickly analyzed. The parameter identification can be performed with complicated tests using inverter and a driving machine, or using simpler methods that do not need any inverter supply and prime movers.

Power Measurements on a 6-Phase Motor

The evaluation and testing of electric drives along with the corresponding control strategies in industrial and electrical mobility applications require precise and highly dynamic power measurements.

Power Measurements on a Pulse Width Modulated Inverter with Perception Software

Accurate and highly dynamic power measurements are required for assessing and testing electric drives in industrial applications, and for hybrid and electric vehicles. To be able to evaluate these measurement results, the function and working method of the drive components must be considered.

Measurement of Resolver Position Using Genesis HighSpeed Data Recorders

The resolver is an electrical machine that is intensively used in synchronous motor drives to measure the rotor position that is needed for the motor control algorithm. Due to its robustness, the resolver is the popular choice in harsh environments, where the electrical motor is subjected to mechanical stresses and vibrations, such as automotive and aerospace applications.

Calculating Space Vector Quantities and the Air-Gap Moment of Asynchronous Motors

Genesis HighSpeed data recorders from HBM are particularly suitable for measurements on inverter-fed AC induction motors. Thanks to their modular design, these measurement systems allow any number of channels while providing high sampling rates.

Calculation and Realization of Measured Quantities in Electrical Energy Technology as Space Vectors with HBM Perception Software

Space vectors are frequently used for clear and concise realization of measured quantities in electrical energy conversion systems such as transformers or induction motors. Additional information regarding the operating state of these energy converters can be determined if the time-dependent space vectors are realized as locus curves in the complex plane.

Measurement of Symmetrical Components in Three-phase systems

The growing proportion of renewable energy requires these energy producers to also achieve high reliability and defined behavior in critical operating situations. The symmetrical components method can be used to assess and evaluate the operating points of renewable energy producers.

Short-Circuit Tests of High-Performance Traction Batteries Using Non-Linear Current Sensors

Qualifying the circuit breakers and fuses of high-power traction batteries requires the ability to measure currents in the range of a few kiloamps. It also calls for the ability to measure currents of a few amps precisely and with high dynamics. This report introduces a specially developed non-linear current sensor (NLCS) and explains measurement and analysis using the Genesis HighSpeed data recorders.

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