Rexroth IndraDrive Regenerative Power Supply
R922002792 | Type Code: HMV01.1R-W0018-A-07-FNN2
In a multi-axis servo cabinet, the “quiet hero” is rarely a motor or a drive controller. It’s the supply unit that builds the DC link and keeps the whole system electrically sane when axes accelerate, decelerate, and trade energy back and forth. The Rexroth IndraDrive HMV01.1R-W0018-A-07-FNN2 (ordering number R922002792, as provided) is a compact regenerative power supply unit designed exactly for that job: it generates the DC bus for an IndraDrive system and, crucially, can return braking energy back to the mains instead of wasting it as heat.
Rexroth HMV01 family includes both rectifier-only and rectifier/regeneration variants. The “R” in HMV01.1R identifies the regenerative class, intended for machine builders who want a cleaner energy strategy than “dump everything into braking resistors.”
What “Regenerative Supply” Means in Real Machines
When servo axes decelerate, their motors act like generators. That energy flows into the DC bus. In a traditional setup, excess DC bus energy is handled by a braking chopper and resistor, turning valuable electricity into cabinet heat. In a regenerative architecture, the supply unit actively manages that energy and pushes it back into the AC grid (within the system’s design limits), which can reduce resistor duty, lower thermal load, and improve overall efficiency—especially in applications with frequent braking cycles.
This is not abstract theory; it directly impacts cabinet design:
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Less heat to extract from the enclosure can mean simpler airflow planning and more stable component temperatures.
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Reduced reliance on braking resistors can simplify maintenance planning in high-cycle production lines.
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Energy-aware machines (high dynamics, repetitive indexing, constant start/stop) benefit most.
Product Positioning in the IndraDrive System
The HMV01.1R-W0018 is typically used as the front-end DC bus source for IndraDrive drive controllers (commonly referenced with HMS01/HMD01 compatibility in aftermarket technical listings).
A key detail that signals “regeneration-ready” engineering is the presence of the X14 mains-voltage synchronization interface, which the Rexroth documentation states is only available on regenerative supply units (HMV01.1R).
That synchronization is part of what allows controlled energy feedback behavior and stable interaction with the incoming supply.
Technical Data Overview
Below is a practical specification table compiled from commonly published listings and Rexroth documentation references for the HMV01.1R class. Because market listings sometimes disagree on items like protection class and “700 vs 750 V” phrasing, treat the table as an engineering quick-scan and confirm the final values on the nameplate and the official project documentation for your cabinet.
| Parameter |
Typical / Commonly Listed Value |
| Product Type |
IndraDrive regenerative power supply unit (HMV01.1R) |
| Type Code |
HMV01.1R-W0018-A-07-FNN2 |
| Ordering Number |
R922002792 (as provided by user) |
| Rated Power Class |
18 kW |
| DC Bus (nominal) |
700 VDC nominal (commonly stated) |
| DC Output (often listed as) |
Up to 750 VDC in some listings (wording varies by source) |
| Mains Input |
3-phase AC 380–480 V, 50/60 Hz |
| Input Current (typical listing) |
26 A |
| Output Current (typical listing) |
24 A |
| Cooling |
Forced air / internal air cooling (often described with integrated blower concept) |
| Protection Class |
Often listed as IP20; some commercial listings cite IP36—verify by nameplate/variant |
| Ambient Temperature (typical listing) |
0 to +40 °C full data; derating above this range is commonly stated |
| Special Interface Note |
X14 mains synchronization is stated as regenerative-only (HMV01.1R) |
Why This Model Is Chosen (and When It’s Overkill)
The W0018 power class is attractive when you need regeneration benefits but don’t need a huge supply stage. It tends to fit well in:
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Indexing conveyors and packaging lines with constant decel/accel cycles
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Robotic cells where axes frequently brake and reposition
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Web handling, winding/unwinding, and other applications that repeatedly “give back” kinetic energy to the DC bus
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Compact multi-axis cabinets where thermal headroom is tight and every watt of heat matters
If your machine rarely brakes (or braking energy is tiny), a regenerative supply can be unnecessary complexity. But if your cabinet currently runs hot because resistors are burning off energy all day, regeneration is often the most “boring-smart” fix.
Integration Notes That Prevent Pain Later
Regenerative systems behave best when the cabinet is designed as a system, not as a stack of independent parts. A few details worth treating as non-negotiable:
1) Mains synchronization and phase correctness
Rexroth documentation describes tapping the synchronizing voltage before the mains choke but after the mains filter, and emphasizes phase alignment between mains connections and X14 pins.
2) Control voltage reliability matters
The HMV01 instruction manual warns about scenarios where energy can enter the DC bus not only from the mains but also from regeneratively operated motors, and it advises buffering the 24 V supply (for example via UPS) so monitoring remains active and the system can shut down energy flow in fault conditions.
3) Protection class ambiguity is a procurement trap
Because different resellers list different IP ratings (IP20 vs IP36), treat enclosure protection as something you confirm from the actual unit label and cabinet design requirements, not from a web listing.
Summary
The Rexroth HMV01.1R-W0018-A-07-FNN2 is a regenerative IndraDrive supply unit built to create a stable DC bus and manage braking energy intelligently—often sending that energy back to the mains rather than turning it into cabinet heat. With a commonly cited 18 kW rating and 380–480 VAC three-phase input range, it fits well in compact, high-cycle automation systems where thermal control, efficiency, and clean energy handling are not “nice to have,” but core reliability factors.
