OSIRIS™ - Powermeter

The standard power meters on the market were originally designed to measure an electrical signal with a fixed frequency – such as those in household networks – with high accuracy. However, in an electric vehicle operating at different speeds, new constraints apply, as a vehicle on the road will inevitably need to accelerate, brake and stop. To fully develop and validate an electric propulsion system, it is critical that no element of the various transient phenomena is overlooked, including those that occur within each rotation of the motor.

Why?

In OSIRIS™, the signal is processed to calculate and record data at the same frequency as the motor’s electrical signal: the signal is therefore recorded regardless of the motor’s speed of rotation, rather than over a fixed period. This enables real-time analysis not only at a fixed speed but also, and most importantly, during transitional phases at variable speeds.

Differences Between OSIRIS™ and Standard Methods in E-Motor Measurement Analysis

Why does the OSIRIS™ Powermeter take measurements during each electric motor cycle? Because ENORISE understands the end user requirements and has been developing and testing electric motors in its own test centers for over 40 years.

With e-motor and e-axle test benches across its 8 test centers, 70 battery test benches with climate chambers (some of which are installed in the largest high-voltage battery test center in the world), and 150 traditional test benches, ENORISE is uniquely positioned to provide unparalleled expertise in this field.

Measuring Global E-Powertrain Output

The OSIRIS™ Powermeter takes measurements at various points within the powertrain as required by each Unit Under Test (UUT): for instance, fixed frequency measurements (50 Hz) at the battery output, or measurements adapted to the 1 Hz to 10 kHz cycle at the inverter output. The OSIRIS™ Powermeter takes into account the behavior of each UUT.

Moreover, it can also measure mechanical parameters (torque, speed) during each motor rotation cycle at the motor output. Because, after all, what really needs to be measured in a powertrain, if not the efficiency of each of its components? If torque and speed are not measured at the output, how can the overall efficiency of the system be accurately calculated?

Boost your electric revolution with ENORISE

OSIRIS™ POWERMETER covers all the usual functionalities of a wattmeter and fits all types of application: e-motor, e-axle, inverter and battery. It performs real-time power measurement of all common values used to evaluate the output performance of converters and electric motors, including active power, apparent power, reactive power and power factor. Whether on-board or in a bench, OSIRIS™ can retrieve all the power measurements necessary for the development of your BEV, PHEV and MHEV.

OSIRIS ™ can also still be used as a Combustion Analysis System simply by using the appropriate conditioning ENORISE charge amplifier, ACPM module, pressure sensors and ENORISE Combustion software, which enables optimization of its usage and the testing device budget.