Emerson SP4402

Core Technical Specifications

• Input Electrical Rating: 3-phase 380–480V AC, 50/60Hz
• Power Rating: 15kW continuous normal duty, 18.5kW heavy overload duty
• Output Current: 30A continuous, 45A 150% overload for 60 seconds
• Control Modes: V/F open-loop vector, closed-loop flux vector, high-bandwidth servo mode, regenerative four-quadrant operation
• Switching Frequency: Adjustable 2kHz–16kHz
• Built-in Communication: RS485 Modbus RTU native port; expandable via plug-in option modules (Profibus DP, Ethernet IP, CANopen, DeviceNet)
• Analog I/O: 2x 0–10V analog input, 2x 4–20mA analog output
• Digital I/O: 6 programmable digital inputs, 3 relay digital outputs
• Encoder Feedback Interfaces: Incremental encoder, SinCos encoder, resolver support
• Efficiency Rating: Up to 98.2% full-load energy conversion efficiency

Function Features

1. Regenerative Energy Recovery: Built-in active front-end circuit to feed braking kinetic energy back to AC grid, eliminate external braking resistor and cut energy waste for high inertia lifting, winding and centrifugal equipment
2. Multi-axis DC Bus Parallel: Multiple SP4402 drives can share common DC bus to balance regenerative energy among axes, reduce system peak power consumption
3. Comprehensive Motor Protection: Overcurrent, overvoltage, undervoltage, motor thermal overload, drive overheat, stall detection, phase loss, ground fault short-circuit protection with real-time fault code logging
4. Flexible Motion Functions: Electronic gearing, flying shear, position homing, electronic cam, multi-segment speed profile programming via internal PLC function blocks
5. Secure Disable Safety Circuit: Standard SIL2 certified safe torque off terminal to meet machinery safety standards EN60204-1
6. Parameter Copy Function: Detachable local keypad supports parameter cloning between identical drives for fast on-site commissioning

Application Scenarios

• Metal processing: Wire drawing machines, metal rolling mills, extrusion lines
• Printing & packaging: Winding/unwinding film lines, high-speed printing presses, slitting equipment
• Lifting machinery: Cranes, elevators, hoists requiring four-quadrant regenerative control
• Textile industry: Spinning frames, warp knitting machines, high-speed looms
• CNC machine tools: Spindle drives for vertical machining centers, lathes
• Conveying systems: Heavy-duty inclined belt conveyors with frequent start-stop

Material Composition & Structural Characteristics

• Main Housing: Cold-rolled steel chassis with anti-corrosion phosphate coating; front panel high-temperature flame-retardant ABS plastic
• Power Module: IGBT silicon carbide hybrid power semiconductor module with integrated temperature sensing chip
• Heat Dissipation Structure: Vertical aluminum extruded heat sink with axial cooling fan; independent air channel separating power circuit and control circuit to avoid dust contamination
• Terminal Block: Copper alloy tin-plated power terminals, gold-plated signal terminals for anti-oxidation and stable low-resistance signal transmission
• Protection Grade: Standard IP20 for cabinet internal installation; optional IP54 sealed cover for dusty semi-open workshop environments

Working Principle

1. AC three-phase mains input passes EMC filter and rectifier bridge to convert alternating current into DC bus voltage
2. DSP core executes real-time vector algorithm to generate PWM drive signals for IGBT power modules
3. IGBT converts DC voltage into variable frequency/variable amplitude three-phase AC to drive motor stator winding
4. In regenerative braking status, motor operates as generator, reverse current flows through IGBT rectifier circuit to feed power back to grid
5. Encoder feedback signal is sampled at microsecond level to form closed-loop speed/position control loop for high precision motion regulation

Installation Requirements

1. Mount vertically inside standard industrial control cabinet; reserve minimum 100mm upper and lower ventilation clearance for heat dissipation
2. Input power cable must match 10mm² copper wire for full rated load; shielded twisted pair cable mandatory for encoder and analog signal wiring
3. Separate power wiring and signal wiring routing distance ≥30cm to suppress electromagnetic interference
4. Ground terminal connected to cabinet protective earth with dedicated 6mm² grounding cable, grounding resistance ≤4Ω
5. Ambient operating temperature range: -10°C to +45°C; derate output power 1% per 1°C above 45°C, maximum allowable ambient temperature 50°C
6. Storage temperature: -40°C to +70°C; avoid condensation environment with relative humidity 5–95% non-condensing

Usage Precautions

1. Do not perform power cycle within 3 minutes after shutdown to prevent DC bus capacitor damage
2. Disconnect main power supply before opening drive cover for maintenance; wait minimum 15 minutes for capacitor full discharge
3. Strictly match motor rated voltage and current parameters during parameter setup; incorrect motor data will trigger overload protection and motor burnout
4. Do not operate drive without load test for long duration; no-load operation easily causes unstable PWM waveform and internal component aging
5. Regularly clean heat sink fan dust every 3 months in dusty industrial workshops to prevent overheating shutdown
6. When using regenerative parallel DC bus configuration, all parallel drives must connect identical AC power source to avoid cross-circuit short-circuit risk