Advanced and easy to use solutions for complete electric and hybrid vehicle testing in the development, validation and production phase. One-stop solutions for electric motor and inverter testing, battery and battery charge testing, combustion analysis, hydrogen engine testing and more.
The power analysis module allows measuring every kind of motor (1-12 phase) and inverter (DC-AC, AC-AC, switching frequencies up to some 100 kHz). Modular DAQ system allows measuring the power (AC or DC) at multiple points perfectly synchronized. This unique feature allows comprehensive analysis for all types of electric drivetrains:
considering also other loads (heating, air-conditioning, 24V, 12V, etc.).
The high sampling rate and bandwidth of the Dewesoft power analyzer enable the measurement of wireless in-wheel motors. And thanks to the small physical size of the hardware, you can even use it to measure the efficiency of electric motorcycles and electric two-wheelers under real driving conditions.
Dewesoft offers a one-stop solution for hybrid engine testing. Our Combustion Analyzer module allows a detailed analysis of the combustion engine while the power analysis module allows perfect analysis of electric motor, inverter, and batteries. While there are separate solutions for combustion and power analysis on the market, Dewesoft offers a unique solution to measure and analyze both with a single instrument fully synchronized. This gives you the flexibility to test and analyze the entire vehicle with a single DAQ system.
The combustion analysis module can display and compare measurement data using several different diagrams like the pV-diagram (pressure over angle) or the CA-Scope (pressure over angle). All the specific calculations like the mean effective pressure (IMEP, PMEP), heat release, start/ end of combustion (SOC, EOC), start/end of injection (SOI, EOI), indicated power, maximum pressure (Pmax), derivate pressure (dp/da) are presented either as color diagrams or as a data tables. For more detailed analysis, statistical calculations per cylinder or over the complete engine can be performed.
Additionally, we provide a dedicated knocking detection and combustion noise algorithm. The basis for all of these calculations is precise angle position data and cylinder pressure measurement. Dewesoft provides the perfect hardware for this task. The galvanically isolated SIRIUS DAQ systems charge inputs (with up to 24-bit resolution and 160 dB dynamic range) which are in perfect sync to the Dewesoft Supercounter inputs. This solution offers a perfect analysis of hybrid cars on the road or in the testbed.
For more information see the Hybrid Engine Measurement Webinar.
The drivetrain of hydrogen cars differs from pure electric vehicles due to energy storage. While pure electric vehicle uses a battery as energy storage, the hydrogen-powered vehicle uses hydrogen as energy storage which is converted to electric power via a fuel cell.
The drivetrain also includes a so-called supercapacitor which stores power for short time peak loads (up to 2000A) and a battery pack.
The testing of hydrogen cars affords a couple of AC and DC power measurements (see picture). To determine the efficiency of hydrogen cars, we need additional measurements, like the voltage, current, and hydrogen flow.
U, I, P, Q, and impedance
Individual setup of the number of harmonics including DC component (Example: 20 kHz sampling rate = 200 harmonics @ 50 Hz)
Harmonics up to 3000th order (@50 Hz)
Variable sidebands and half sidebands for Harmonics
Higher Frequencies up to 150 kHz in 200 Hz bands
Interharmonics, groups or single values
According to EN 61000-4-7
Calculation corrected to the actual real frequency
THD, THD even, THD odd
Trigger on each parameter
Background harmonics subtractable
The battery as the central element in the electrical powertrain strongly affects the performance and range of electric vehicles. Extensive tests are necessary, starting from the cell characteristics up to the complete powertrain. Detailed analysis requires temperature and voltage measurement at multiple points (e.g. 50x cell voltage and 50x cell temperature). The flexible and scalable Dewesoft solution allows measuring more than 1000 channels from different sensors, all perfectly synchronized.
The DEWESoft® Power Analyzer system can be used for the development of batteries (efficiency analysis, cell characterization, endurance tests, crash tests, short-circuit analysis, overheating/overloading tests, aging tests, etc.) as well as for monitoring applications (data logging, transient recording, charge-discharge analysis, etc.).
The Dewesoft solution can measure harmonics for voltage, current and additional active and reactive power up to the 3000th order. All calculations are implemented according to IEC 61000-4-7 standards.
You can define the number of sidebands and half-bands for the harmonic order calculation. The higher frequency parts can be grouped in 200 Hz bands up to 150 kHz.
The calculation of THD (overall harmonic content) for voltage and current up to 3000th order and the interharmonics complete the analysis functionalities.
These powerful harmonic calculation functions offer analysis for all types of electrical equipment and devices.
Charging analysis can be done for conductive charging (AC or DC) and as well for the increasingly popular inductive charging. The inductive charging process (also called wireless power transfer) affords high switching frequencies of the inverter (up to 150 kHz) to reach the maximal efficiency of the power transfer.
The high sampling rate (1 MS/s) and the possibility to measure AC and DC currents of the Dewesoft Power Analyzer fulfill all requirements for testing both, conductive and inductive charging.
The innovative solution of DEWESoft® allows measuring the energy consumption of electric vehicles on the test bench as well as inside the vehicle under real-driving conditions with the same measurement device.
For the mobile application, the measurement device can be powered by hot-swappable battery packs so that measurements up to several hours are possible. All sensors (current transducers, GPS, Video) and further equipment like displays can be powered from the measurement device itself. Also, the zero-flux transducer which need a lot of power (up to 20 watts per unit) can be powered via the additional MCTS power slice.
The testbench applications require several interfaces (CAN, OPC, DCOM, etc.) to get data and send the data from the testbench control. The Dewesoft X NET option provides remote-control features for the Dewesoft DAQ systems. This allows controlling the whole test procedure from a single PC in the control room.
The modular hardware design of the Dewesoft Power Analyzer offers a wide range of input amplifiers. In combination with the flexible software makes it possible to acquire a lot of additional parameters: e.g. torque, speed, temperature, pressure, flow rate, video, GPS data (position, acceleration, speed), vehicle bus data (e.g. CAN, OBDII, XCP, FlexRay), and many more.
All these additional data sources are synchronized to the power analysis signals, even when they use different sampling rates. This unique combination of time-, angle- and frequency-domain data acquisition in one system makes it possible to run multiple analysis functions concurrently: e.g. order tracking, torsional vibration, power, combustion analysis, and many others.
Standardised driving cycles (NEFZ, WMTC, etc.) are not suitable to measure the energy consumption of electric vehicles. They don’t consider all aspects which influence the energy consumption of vehicles and are always done on roller test benches. The future of electric vehicle testing is analyzing them under real-life conditions. The innovative solution of Dewesoft allows doing all analysis already during the measurement. The sophisticated math functions can calculate different parameters like efficiency, recuperation, etc. and the user-friendly and customizable software interface allows real-time visualization of all these parameters. The chart shows the exemplary energy flow of an electric vehicle.
Some inverters of electric vehicles (e.g. bus) are working at different switching frequencies to increase the efficiency in different driving situations (city/overland drive). With the Dewesoft math library, it is possible to filter out the currently used switching frequency and automatically do the analysis for different switching frequencies (using logical conditions).
There are a lot of parameters which can influence the energy consumption of electric vehicles. These parameters can be ambient parameters like temperature, weather, quality of the road or different driving situations (uphill, downhill, city, overland or combined drives) or also different drivers. The Dewesoft Power Analyzer makes it possible to do energy analysis considering all of these parameters already during the test drives.
The first chart shows an example of the acceleration behavior of different test drivers on the same test-track (left) and the analysis in different driving situations. The acceleration behavior can influence the energy consumption of up to 10 %.
The second chart shows the acceleration of the scooter at different driving situations. The green chart is the acceleration with full-charged battery, the blue one when the battery was nearly empty, the red one for uphill and the magenta one for downhill driving.
The data logging capability of the Dewesoft Power Analyzer allows recording the complete charging process.
Example photo on the right show analyzing charging profile (red = charging power, orange = energy, violet = power factor):
Dewesoft supports EMC conformity tests of charging devices according to IEC 61000-3-2 and IEC 61851 standards. The Power Quality module automatically calculates all necessary parameters.
Instruments like the Harmonic FFT, the Harmonic table, Harmonic reference curve, and the scope function ensure fast and reliable analysis.
Using the Dewesoft data acquisition systems opens you a whole lot of other automotive testing possibilities. Here are some of the applications that you can combine with your power analysis:
The world's most versatile, powerful, high-dynamic USB and EtherCAT data acquisition system. Connect any signal and sensor. Packed with the latest DAQ technology. Free DAQ software included.
Compact, mobile, and portable data acquisition systems that feature a built-in data logger, powerful data processing computer, multi-touch display, and internal batteries for maximum portability.
High channel count data acquisition system with built-in data logger and powerful data processing computer, touch screen display (R8D) and internal batteries (R8B, R8DB) for maximum portability.
High-accuracy sensors for AC/DC current measurement and power analysis. From current clamps to high-precision zero flux current transducers and Rogowsky coils.
Our current transducers are a perfect fit for our data acquisition systems and can precisely measure AC/DC current with up to 0.03% accuracy. TEDS equipped for automatic detection and setup.
High accuracy 100Hz GPS and GNSS receivers and Inertial Navigation Systems (IMU - inertial measurement units) with Real-time Kinematics (RTK) correction for the most precise position-based test and measurement applications.
DewesoftX is an award-winning data acquisition software for test & measurement and monitoring. Experience data recording, signal processing, and data visualization like never before.
DewesoftX DAQ software received multiple international awards, is innovative and easy-to-use, but at the same time very deep in functionality. Our mission is clear - one software for all test and measurement applications.
The Dewesoft Power Analyzer is not only the smallest power analyzer in the world, but it’s also the most powerful one. The flexible hardware platform combined with powerful software features gives unique testing possibilities for any kind of electrical measurement.
Dewesoft power analyzers can accurately measure direct high-voltage and current signals but do not stop there. They can also measure vibration, temperature, GPS/GNSS, CAN bus, video, and many other data fully synchronized.
Complete combustion measurement and analysis system for internal combustion engine research and development, optimization and testing of ignition systems, exhaust systems, and valve control gear.