eMobilityAnalyzerGetting the Essence Out of Your HV Measurement
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What is the eMobilityAnalyzer?
The eMobilityAnalyzer is a function library for EV-Development. As the heart of our scalable Vector/CSM eMobility Measurement System it calculates from raw signals, such as current and voltage, the desired derived signals of interest such as power, etc. by using complex mathematical algorithms.
An easy to use graphical user interface simplifies the usage of the algorithms. The system generates results online as a calculated signal. These signals can be used right away, e.g. for visualization, in trigger conditions or further calculations. The online availability of the results, without a time-consuming post-processing interim step allows more effective test methods.
You want all information about the eMobilityAnalyzer in one concise document?
- Enables laboratory PowerAnalyzer functionalities in an automotive-grade measurement system
- Online Calculation on High Speed input signals
- Direct availability with calculated results for recording, further calculation, triggering, …
The Vector/CSM eMobility Measurement System covers the entire range of HV application cases like:
- 3-phase e-motors
- Compliance testing of HV power net and components
- AC or DC chargers
- Pulsed loads such as PTC heating
- DC/DC converters
To provide the best accuracy, the functions require accurate and precisely synchonized analog source signals measured with CSM modules.
Regular exchanges with customer experts help us to continuously increase the power of these functions, so that the eMobilityAnalyzer library is continuously developed further. Feel free to get in touch with us if you have further demands.
|Ripple||Returns the parameters regarding the fluctuations of a given input signal as well as its average and root-mean-square value. It is the ideal function to analyze residual ripples, if power measurement is not needed.|
|DC Analysis||Determination of the active power and energy as well as the residual ripples on voltage and current in the DC area. Applications are in both the traction area (input of the inverter) as well as the with on-board power supply analysis used for testing the compliance of high-voltage components.|
|DC Efficiency||The main values during the design and optimization of components are the losses that occur in the components. The function directly calculates the efficiency from the input voltages and currents, as well as the output of the component under test. Overall efficiency and power losses are also calculated.|
|Charger Efficiency||Measure the efficiency of on-board chargers supplied directly by the power grid. Based on the voltages and currents of the output and the three input phases, it calculates the active input and output powers, and total energies. These provide the overall efficiency and power losses of a charge cycle.|
|Inverter Efficiency||Calculates the efficiency of a three-phase inverter. Also calculates the consumed and produced effective power, and the dissipated power.|
|Harmonics||Conducts a harmonic analysis of a signal, where the fundamental and higher harmonics up to the 15th are analyzed in a prescribed time interval. Besides calculating the true root mean square values of the harmonic components, it calculates the true root mean value of the full signal and the total harmonic distortion (IEEE 1459-2010). The fundamental frequency is automatically determined from a separate input, so that also signals of highly non-linear loads can be analyzed.|
|eMotor Power Analysis||Determines active power, apparent power, reactive power, electric speed and total energy of a 3-phase e-motor in star/Y or delta configuration. Furthermore, the active power of the separate windings are calculated.|
|PWM Power Analysis||Analyzes power consumption of loads driven by pulse width modulated inputs (PWM). Besides calculation of active, apparent, and reactive powers, it determines typical properties of a PWM signal, such as base frequency, duty cycle, etc.|
|eMotor Y Delta||Based on the voltages between terminals and the phase currents, this function conducts the Y-delta and delta-Y transformation. It is useful for checking a proper wiring before usage of the power analyzer function eMotor Power Analysis.|
|Shaft Power||Calculates mechanical power and work based on rotational speed and torque of an external sensor. The output is averaged over a specified time window.|
|Axle Power||Similar to Shaft Power but for two external sensors. In addition, the average rotational speed and the total torque are determined.|
Further powerful library functions
|Linear Mean||Besides the electrical properties of a system, often other quantities need to be analyzed and referenced. This could be average temperatures or any other relevant analog ECU signal. This function calculates the average value of any signal within a specified time window.|
|True RMS||During measurements on loads actuated via PWM or any other general signal shape, the root-mean-square values are often of interest. This function returns the true root-mean-square value of a given input online.|
|Slope||Estimates the average slope of a signal within a specified time window. It uses a moving window and is less prone to noise than usual differentiation, making it very useful in robust triggering applications.|
|PWM Analysis||Calculates base frequency, duty cycle, true root mean square, and high and low values of pulse width modulated signals.|