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Case study: Overhead gantry robot

Wide input voltage facilitates contactless power solution

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Customer’s challenge

For many factories specializing in the fabrication of heavy objects like car engines an overhead gantry provides a convenient way of transporting goods between the various process stages. Adding a robot to each gantry allows increased flexibility at each of the workstations. Typically brushes are used to pick up power on overhead gantry systems. This manufacturer wanted to remove this source of unreliability by switching to a contactless induction power system. The key goals were:

  • Improve reliability of energy transmission by moving to a contactless power solution
  • Compensate for variations in distance between the inductive transmitter and receiver
  • Minimize inertia, and thus the power required to drive the gantry, by reducing weight and size
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The Vicor solution

The gantry’s inductive pick-up generated a widely varying AC output that was rectified and then regulated by a Vicor DCM DC-DC converter. These converters are able to operate over a very wide input voltage range of up to 9 to 1 (high to low input range). This capability enabled the reliable, regulated supply needed for the gantry robot motor drives, actuators and control system.

Key benefits

Key benefits

Wide input voltage range (200 – 400V)

Wide input voltage range (200 – 400V)

Very low weight (29g)

Very low weight (29g)

Small size (just 47.7 x 22.8 x 7.2mm)

Small size (just 47.7 x 22.8 x 7.2mm)

Vicor DCM converter’s wide-input range simplifies design

The DCM converter regulated and isolated the widely varying output from the inductive pick-up, providing a stable output. In addition, the converter’s double-sided cooling reduced the operating temperature, providing increased reliability. To analyze this power chain go to the Vicor Whiteboard online tool.

Learn more about the modular approach power.

The power delivery network

Vicor PDN gandry robot
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DCM DC-DC converters


Isolated regulated


Input: 9 – 420V


Output: 3.3, 5, 12, 13.8, 15, 24, 28, 36, 48V


Power: Up to 1300W


Peak efficiency: 96%


As small as 24.8 x 22.8 x 7.21mm


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