1105 Variable-Frequency AC Drive

For applications requiring variable-frequency or flux vector control of small to medium induction or synchronous AC motors. Operates from 230-240, 380-480, or 575-600 V AC three-phase supplies for power requirements up to 300 hp ( 225 kW) . Features and Benefits : General : • 24-bit digital signal processor ( DSP) for fast, dynamic response • 512 kilobytes battery backup memory for application setup data • 1.5 megabytes scratch pad memory and 6.0 megabytes firmware memory • Clock/ calendar maintains accurate time during power outage • Sine-coded PWM waveform output for improved torque performance • High-switching-frequency IGBT devices for smooth, quiet operation • Digital current regulator for high-speed operation and fast response • Digital space vector control for reduced motor noise and low current ripple • Flux vector control for full starting torque and full torque to base speed • Variable-frequency operation for simple control of motor speed • Internal control loop for maintaining speed with sudden load changes • Automatic field weakening for speeds up to three times base speed • Integral DC link choke for high power factor and low total harmonic distortion • Integral/ optional dynamic braking for fast deceleration or energy absorption • Power disturbance ride-through for reducing nuisance trips • User-programmable analog and digital inputs and outputs • Through-hole heat sink mounting of chassis units for dissipating heat externally • Optional NEMA 1 ( IP20) and NEMA 3R ( IP23) or NEMA 4 ( IP66) enclosures Ease of Installation, Setup, and Maintenance : • Automated setup features require no chart recorders or meters • Software calibration and adjustment eliminates tuning components • Digital parameter adjustment for precise and repeatable settings • Software input and output scaling eliminates potentiometers • Complete, self-contained package requires minimal option boards • Identical control boards across full power range reduces spare parts Ease of Use : • Touch keypad for easy parameter adjustment and access to displays • Two line descriptive plain-language display with numerical and bar graph readouts • Comprehensive fault diagnostics displayed in plain language or graphically • Real-time motion information and time-stamped fault log Safe, Reliable Operation : • Extensive electronic protection circuits • Tolerant of AC line voltage and frequency fluctuations • S-curve acceleration reduces shock and extends equipment life • Multilevel security code prevents unauthorized parameter changes • Lockout of local operator controls for safe remote operation