Description
B&R 8BVI0440HWS0.000-1 | ACOPOSmulti 44A Inverter
Architect’s Product Breakdown
The B&R 8BVI0440HWS0.000-1 is a high-power single-axis inverter module engineered for the modular B&R ACOPOSmulti drive architecture. Occupying a 2-module width (106.5 mm) on the common backplane, this drive unit draws power directly from a shared 750 VDC intermediate DC bus—fed by an ACOPOSmulti power supply module—to deliver up to 44 A continuous RMS current (88 A peak) to a single servo motor.
The “HWS0” designation indicates a wall-mounted cooling execution with an integrated heat sink and forced air convection, dispensing with external liquid cold-plates or pass-through cutouts. The front fascia houses two option card slots (SLOT 1 & SLOT 2) designed to accept ACOPOSmulti plug-in modules, such as POWERLINK network interface cards (e.g., 8AC114.60-2), EnDat/Resolver encoder interface cards, or SafeMOTION safety modules. It also integrates dedicated outputs for a 24 VDC motor holding brake (up to 4.2 A output with open/short-circuit detection) and a direct PTC/KTY temperature sensor input loop.
From an architecture perspective, this module eliminates redundant mains rectifiers, fusing, and line contactors by sharing energy dynamically across the DC bus with adjacent drives. When braking, energy regenerated by the motor attached to this inverter feeds back onto the shared bus to power lighter axes or return to the grid via a regenerative power supply.
8BVI0440HWS0-000-1
Key Technical Specifications
| Parameter | Specification |
| Nominal DC Bus Voltage | 750 VDC (Operating range: 260 to 800 VDC) |
| Continuous Output Current | 44 Aeff (at 5 kHz PWM switching frequency) |
| Peak Output Current | 88 Aeff (max. 5 seconds) |
| Continuous Motor Output Power | 32 kW (3x 0 to 480 VAC output) |
| Switching Frequencies | 5 kHz (nominal), 10 kHz, 20 kHz (with thermal derating) |
| Option Card Slots | 2 slots for ACOPOSmulti plug-in cards (Network/Encoder/Safety) |
| Motor Brake Connection | 24 VDC (+5.8% / -0%), 4.2 A continuous, short-circuit protected |
| Temperature Sensor Input | 1x input (KTY84, PT1000, or PTC thermistor; 500 Ω to 5 kΩ) |
| Auxiliary Supply Input | 25 VDC ±1.6% (via backplane bus bar) |
| Dimensions & Weight | 317 mm (H) x 106.5 mm (W) x 263 mm (D) |
| Certifications | CE, UKCA, cULus Listed (E225616), KC |
Field Engineer’s Pitfall Guide
WARNING: High-Voltage DC Bus Residual Charge Hazard
The intermediate DC bus operates at 750 VDC with high total system capacitance. Disconnecting the module or opening the enclosure immediately after cutting power will expose technicians to lethal shock hazards. Always wait a minimum of 5 minutes after switching off main power, and measure DC bus terminals with a calibrated voltmeter to ensure potential drops below 42 VDC before touching backplane bus bars.
WARNING: PWM Switching Frequency Thermal Derating
Raising the PWM switching frequency from the nominal 5 kHz up to 10 kHz or 20 kHz to reduce motor acoustic noise or optimize high-speed spindle performance drastically increases switching losses. At 10 kHz and higher, continuous current capability derates significantly. If you increase PWM frequency in Automation Studio without calculating thermal derating, the module will hit thermal shutdown under full machine load.
WARNING: Screw Terminal Cable Shielding & Ground Clamps
High-power 44 A drive outputs generate severe electromagnetic interference (EMI). Using unshielded motor cables or failing to clamp the braided shield to the module’s grounding plate using 360-degree shield clips will cause high-frequency ground noise to migrate into adjacent encoder feedback signals, resulting in position drift or encoder communication faults.
QA & Testing SOP
- Visual & Mechanical Inspection:
- Verify housing condition, fan assembly, heat sink fin cleanliness, and module latching mechanisms.
- Inspect power connectors (X5A motor output, DC bus rails) for mechanical wear, pitting, or thermal discoloration.
- Verify integrity of option card slot connector pins (SLOT 1 / SLOT 2).
- DC Bus & Power Stage Diode Diagnostics:
- Perform diode-check measurements across the 750 VDC bus terminals and phase outputs (U, V, W) to verify the integrity of the internal IGBT bridge.
- Conduct high-potential insulation resistance testing (1000 VDC) between power terminals and chassis ground (>100 MΩ required).
- Bench Test Environment:
- Mount inverter onto a live ACOPOSmulti backplane linked to a 750 VDC power supply module and 25 VDC logic bus.
- Insert a POWERLINK communication card (e.g., 8AC114.60-2) and connect to an Automation Studio test bench.
- Connect a 30 kW B&R servo motor equipped with EnDat encoder feedback and a 24 VDC holding brake.
- Dynamic Load & Safety Loop Functional Test:
- Execute full motor commutation identification, auto-tuning routines, and full-speed directional motion profiles.
- Test two onboard Enable inputs to confirm instant hardware PWM disable upon signal drop.
- Verify 24 V/4.2 A holding brake control output switching and open-circuit/short-circuit detection logic.
- Run a 12-hour thermal burn-in cycle under 80%+ load at rated ambient temperature.
- ESD Cleaning & Shipping Preparation:
- Reset parameters to factory default states in Automation Studio.
- Wrap module in static-shielding ESD packaging with dry desiccant packs before placing in shock-absorbing shipping cartons.
Technical FAQ
Can I run the 8BVI0440HWS0.000-1 directly off 3-phase AC mains?
No. The 8BVI0440HWS0.000-1 is an inverter module, not a standalone drive. It has no internal AC-to-DC mains rectifier. It must be mounted on an ACOPOSmulti backplane and supplied with 750 VDC power from an ACOPOSmulti power supply module (e.g., 8BVP series).
Does this drive module include built-in safety functions like STO (Safe Torque Off)?
The base inverter module provides two hardware Enable inputs (Enable 1 and Enable 2) that disable the PWM switching stage within 20.5 ms when de-energized. For certified Safe Torque Off (STO) or advanced safety motion functions (e.g., SLS, SOS), an optional B&R SafeMOTION plug-in module must be inserted into SLOT 1.
What terminal block set is required for motor power connections on this module?
The module requires the dedicated B&R screw clamp terminal block set 8BZVI0440S0.000-1A (or equivalent spring-clamp variant) to wire the motor leads, holding brake, and motor temperature sensor contacts.
How is the 24 VDC logic and control power supplied to the module?
Control power is provided via the ACOPOSmulti backplane’s integrated 25 VDC auxiliary power supply bus bars. When seated on the mounting plate, the internal control electronics, fan power, and option card slots draw logic power directly from these backplane rails.
