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Active Suspension

dynamic by design

High-voltage motor-pump unit

High-tech system for dynamics and performance

Based on the findings of the first generation of the motor-pump unit (MPE), a solution was developed that has been optimized in terms of installation space and performance and is high-voltage capable. The new evolutionary stage enables smart driving dynamics control for each wheel, which can compensate for any rolling, pitching and lifting movements.

Thanks to the technical optimizations compared to the previous generation, the high-voltage MPE, which is supplied directly from the HV on-board electrical system, impresses with the following aspects:

  • 40 % less mass
  • 25 % smaller diameter
  • 26 % shorter
  • Up to 60 % more hydraulic power
  • Up to 35 % more electrical power
  • 60 % shorter response time of the MPE

The significant reduction in overall packaging makes it possible to integrate the high-voltage MPE axle sets into existing installation spaces of previous roll stabilization systems. In addition, the new MPE has been optimized with regard to NVH behavior, which is particularly relevant for use in ICE-independent vehicles.

 

Produktfoto einer elektrohydraulischen hochvoltfähigen Motor-Pumpen-Einheit von RAPA Automotive

Flexible modular structure

The machine is specifically designed as a modular system, which can be optimally adapted to the various standard vehicle electrical system voltages by varying the twelve stator windings. This made it possible to achieve the main objective of covering the nominal voltages of 400 and 800 volts.

Building on the development knowledge gained and with the aim of realizing a cost-optimized modular structure, RAPA Automotive is currently working on further developing the high-voltage unit for future mobility solutions in order to set new benchmarks.

Smart component for innovative chassis

As a core component of the innovative Porsche Active Ride chassis, the performance of the advanced, electrohydraulic MPE was experienced for the first time in the Porsche Panamera of the third model generation in the E-Hybrid models. The high-voltage-capable solution is also used in the Taycan model series.

Foto eines Porsche Panamera E-Hybrid Stellmotors im Schnitt
© Dr. Ing. h.c. F. Porsche AG

Key features

Cost- and space-optimized design:
Highly compact axle set with an ECU for 2 motor pumps

Efficient:
High efficiency thanks to plastic canned motor and leakage-compensated internal gear pump

Highly dynamic:
Optimization of pump, motor and controller for use with fully active dampers

Flashable:
Software update possible via CAN; OTA update capability

BEV-compatible:
noise-optimized design

Customized solution

  • Mounting (mechanical bracket)
  • Hydraulic interface (hydraulic outlet)
  • Supply voltage (400 V or 800 V nominal voltage)
  • Optional incl. attached hydraulic lines
  • Optional hydraulic pre-filling on delivery with attached hydraulic lines

The next level of engineering

Take a look behind the scenes -
here you can get an insight into our high-voltage MPE.

 

All data at a glance

You can download our product data sheet here

What are the advantages of a high-voltage MPE from RAPA Automotive?

  • Most powerful series system with complete high-voltage integration
  • NVH-optimized: noise-optimized design, especially for BEVs
  • Powerful hardware: customer-specific adaptations possible thanks to free computer capacity
  • Market experience - first series product in this class
  • Compact axle unit with optimized costs and installation space thanks to 1 ECU for 2 motor pumps (e.g. reduced weight, dimensions, increased performance)

Facts, figures and data

TypeElectro-hydraulic high-voltage motor-pump unit
Flow directionReversible depending on the direction of rotation of the electric motor
Operating modesPump operation and generator operation in both directions of rotation
Power outputMax. 4.7 kW per motor
Operating pressure differenceMax. 135 bar
Volume flowMax. 28 l/min
Operating voltage290 V - 435 V / 450 V - 920 V
Protection classIP6K9K
Installation positionAny (preferably in axle alignment, parallel to the axle carrier)

Possible areas of application

Wherever highly dynamic, electrified oil pumps are required, e.g:

  • In active + fully active chassis systems (passenger cars and commercial vehicles)
  • Replacement of mechanical hydraulic pumps in vehicles
  • Oil pressure supply for industrial applications