48V intelligent-stator motor controller shrinks
The fourth generation of Volabo’s Intelligent Stator Cage Drive (ISCAD) is considerably more compact than its predecessor, as the size and weight of the power electronics have been reduced by more than 50 percent. In addition, the power electronics compartment, which also contain the central intelligence of the electric motor, have been significantly improved. Since the power electronics are now based on more compact modules, the appropriate number of modules can be mounted depending on the power class of the drive. The drive technology is thus well scalable and can be used in various areas such as marine, automotive or off-road. With a length of only 33 centimeters, the engine can now be integrated very well into various vehicles.
Volabo’s 48V concept for the electric drive differs from conventional electric drives, the start-up company claims. ISCAD is an electrically safe and cost-effective drive without rare earth magnets. Instead of copper windings in the stator, the fixed part of the electric motor, Volabo uses aluminium rods that can be individually controlled. This allows the drive to adapt dynamically to the load profile, which makes it very efficient, especially in the partial load range.
The complete integration of the control electronics into the power electronics has further increased the degree of integration in particular. The drive is now being tested on the test bench and in a vehicle in which the original drive has been replaced by the ISCAD prototype. With a length of only 33cm, the entire motor including the associated electronics, i.e. the converter with control unit, is housed very compactly, as Volabo managing director Florian Bachheibl explains: “This way we achieve a high power density and the drive unit can be easily installed on the axle, as we have shown with the example of the demo vehicle. The new generation also consists of fewer components, which makes the power electronics both more cost-effective and more robust. With this fourth generation, Volabo is taking an important step towards the product”.
More information: www.volabo.com
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