Allen-Bradley 1336F-BRF100-AE-EN AC Variable Frequency Drive – 1336 FORCE

Allen-Bradley 1336F-BRF100-AE-EN: 100HP Flux Vector AC Drive in the 1336 FORCE Architecture

The 1336F-BRF100-AE-EN is a 100HP (75kW), 460V three-phase AC variable frequency drive belonging to Rockwell Automation’s 1336 FORCE platform — a drive family engineered specifically for process-critical applications where torque linearity, speed regulation accuracy, and network transparency are non-negotiable. Unlike general-purpose V/Hz drives, the 1336 FORCE employs closed-loop flux vector control as its primary control algorithm, enabling sub-1% speed regulation without encoder feedback and sub-0.1% with a quadrature encoder installed. This positions the 1336F-BRF100-AE-EN as a direct-fit solution for high-inertia loads, tension-controlled winding systems, and multi-drive coordinated motion architectures.

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Technical Parameters

Hardware Logical Analysis

The 1336F-BRF100-AE-EN is built around a three-stage power conversion topology: a six-pulse diode rectifier front-end, a capacitor-bank DC bus, and an IGBT-based three-phase PWM inverter output stage. Each stage carries distinct engineering implications for system designers.

Rectifier & DC Bus Architecture: The six-pulse rectifier converts 460V AC to approximately 650V DC. The DC bus capacitor bank is sized to sustain ride-through during brief input voltage sags (typically 15–20ms at rated load), a critical characteristic for installations where utility quality is inconsistent. The BRF designation confirms an integrated dynamic braking transistor is mounted on the DC bus rail — this transistor gates regenerative energy from decelerating loads into an external braking resistor, preventing DC bus overvoltage trips during rapid deceleration cycles. No external braking chopper module is required, reducing panel footprint and wiring complexity.

IGBT Inverter & PWM Strategy: The output inverter uses insulated-gate bipolar transistors (IGBTs) with programmable carrier frequencies between 2kHz and 8kHz. Lower carrier frequencies (2–4kHz) reduce IGBT switching losses and thermal stress at full load; higher frequencies (6–8kHz) reduce audible motor noise and are preferred for HVAC fan applications. The drive’s dead-time compensation algorithm corrects for IGBT switching delays, maintaining output voltage linearity across the full speed range — a factor that directly affects motor heating at low speeds.

Flux Vector Control Engine: The 1336 FORCE control board implements a real-time flux vector algorithm that independently regulates the flux-producing (d-axis) and torque-producing (q-axis) current components of the motor. This field-oriented control (FOC) approach decouples torque from flux, enabling full rated torque delivery at zero speed — a capability that V/Hz drives cannot achieve. The motor model parameters (stator resistance, rotor time constant, leakage inductance) are identified during an autotune routine and stored in non-volatile memory, eliminating the need for manual parameter entry during commissioning.

EMC Design: The chassis incorporates a common-mode choke on the output stage to suppress high-frequency leakage currents that would otherwise flow through motor bearing races — a primary cause of premature bearing failure in VFD-driven motors. The control board is physically isolated from the power board via an optical isolation barrier on all analog and digital I/O signal paths, providing a minimum 2500V isolation rating between the control circuit and the power circuit. This optical isolation architecture eliminates ground loop interference in installations where the drive and PLC share a common signal ground reference.

Thermal Management: The drive uses a forced-air cooling system with an internal fan drawing air through the heatsink fins mounted on the IGBT modules. A thermistor embedded in the heatsink monitors junction temperature in real time; the drive initiates a controlled shutdown at a programmable overtemperature threshold before thermal damage occurs. The heatsink is designed for front-access mounting in a standard 19-inch or custom enclosure, with exhaust air directed upward — a layout that simplifies enclosure thermal design.

System Integration Benefits

• Deterministic Ethernet/IP Communication: The EN suffix enables native Ethernet/IP connectivity, allowing the drive to exchange cyclic I/O data with a ControlLogix or CompactLogix PLC at scan rates as low as 1ms — sufficient for coordinated multi-axis motion without a dedicated motion controller.
• Add-On Profile (AOP) Support: Rockwell’s Studio 5000 Logix Designer includes a certified AOP for the 1336 FORCE, enabling drag-and-drop drive configuration within the PLC programming environment. All drive parameters are accessible as structured tags, eliminating the need for separate drive commissioning software during initial setup.
• Diagnostic Transparency: The drive maintains a 10-event fault queue with timestamp, fault code, and operating conditions (speed, current, voltage) at the moment of each fault. This data is accessible via the communication network without interrupting drive operation, enabling remote diagnostics without a site visit.
• Programmable Fault Response: Each fault type can be individually configured to trigger a controlled stop, coast-to-stop, or auto-restart sequence. Auto-restart with programmable retry count and delay is critical for unattended pump and fan applications where nuisance trips cause process disruption.
• Process PID Controller: An internal PID loop controller accepts a process variable from an analog input (4–20mA transmitter) and adjusts motor speed to maintain a setpoint — eliminating the need for an external PID controller in single-loop pressure or flow control applications.
• Multi-Drive Coordination: The shared DC bus architecture allows multiple 1336 FORCE drives to share a common DC bus rail, enabling regenerative energy from decelerating drives to be consumed by accelerating drives on the same bus — reducing net energy consumption in multi-drive systems such as winder/unwinder pairs.
• Motor Protection Integration: The drive’s electronic overload function provides Class 10, 20, and 30 motor protection curves, replacing a separate thermal overload relay in the motor branch circuit. The overload model accounts for motor thermal history across multiple start/stop cycles, providing more accurate protection than a bimetallic relay.
• Legacy Platform Compatibility: Via DH+ and Remote I/O adapter modules, the 1336F-BRF100-AE-EN integrates with legacy SLC 500 and PLC-5 control systems without requiring a controls upgrade — a significant cost advantage in brownfield retrofit projects where the existing PLC infrastructure is retained.

Quality Assurance & Global Logistics

Every 1336F-BRF100-AE-EN unit dispatched from our Xiamen, China facility undergoes a structured pre-shipment verification protocol. The unit is powered on under load conditions; all analog and digital I/O channels are exercised; the fault log is reviewed and cleared; and the firmware version is documented. Physical inspection covers connector integrity, capacitor condition, IGBT gate driver boards, and cooling fan operation. Units that do not pass all verification steps are quarantined and not offered for sale.

Packaging uses a double-wall corrugated outer carton with a custom-cut EPE foam inner liner and anti-static PE bag — a combination that meets ISTA 2A transit testing standards for fragile electronic equipment. Shipments are dispatched via DHL Express, FedEx International Priority, or UPS Worldwide Expedited, with tracking numbers issued within 24 hours of dispatch. Transit time to most destinations in North America, Europe, and Southeast Asia is 3–5 business days from Xiamen. For time-critical orders, same-day dispatch is available for orders confirmed before 14:00 CST.

A 12-month operational warranty covers all units against manufacturing defects and functional failure under normal operating conditions. Warranty claims are processed within 5 business days; replacement units are dispatched before the defective unit is returned in confirmed cases, minimizing production downtime for the customer.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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