Parker frequency inverters AC690+ general purpose series

Parker integrator series AC drive AC690+ series overview.

Description.
The AC690+ Series is a single range of AC drives designed to meet the requirements of all variable speed applications from simple single motor speed control through to the most sophisticated integrated multi-drive systems. The heart of the AC690+ is a highly advanced 32-bit microprocessor based motor control model. This provides an exceptional dynamic performance platform to which can be added a host of communications and control options, enabling you to tailor the drives to meet your exact requirements. The AC690+ is available in 380-500 V 3-phase 0.75 to 1000 kW and 220-240 V 0.75 to 55 kW.
Features.
- Modes of Operation:
The AC690+ can be user configured for 3 different modes of operation.
- Open-loop (volts/frequency) control:
This mode is ideal for basic motor speed control, or multiple motors driven in parallel. The quick set-up menu and plain language display ensures the quickest and easiest, trouble free start up.
- Sensorless vector control:
High starting torque and tight speed regulation is provided by a sophisticated MRAS (Model Reference Adaptive System) motor control strategy. MRAS provides accurate speed simulation (without the need for any speed measuring transducer) by continually modelling the motor.
- Closed-loop vector control:
Full closed-loop flux vector performance can be achieved with the AC690+ by simply adding an encoder feedback ‘technology box’. This provides 100 % continuous full load standstill torque plus a highly dynamic speed loop (up to 45 Hz bandwidth); more than sufficient for the most demanding of applications.
Benefits.
- Vector control with / without encoder feedback
- Power ratings 0.37 to 1000 kW 
- Supplied in enclosure above 355 kW 
- Pre-programmed application Macros 
- Programmable over communications 
- Programming identical to DC 590+ DC drive 
- Variable torque ratings 
- Class B EMC filters.

Parker frequency inverter AC690+ series technical characteristics.

Demanding Environments.
For environments that have dusty, humid or corrosive atmospheres, the AC690+ can optionally be supplied with conformally coated circuit boards that improve the drives resistance to corrosion, thereby increasing reliability and service life. Industries that would typically benefit from conformal coating could include: 
- Water and wastewater 
- Paper and pulp processing 
- Steel 
- Marine and offshore 
- Outdoor cranes 
- Wind & wave power generation 
- Food processing.

Parker vfd AC690+ series enclosure specifications.

In many applications the overall power consumed by the system is less than the sum of power of the installed motors. Indeed, all sections of a machine do not consume energy at the same time. Typically, some motors will be driven electrically while others are being driven by the momentum of the machine. For such applications, it is economically advantageous to connect the drives of all sections of the machine to a common DC bus: the energy-generating sections are then fed into the energy-consuming sections, which reduces the overall energy consumption of the system. The drive AC690+ configured in 4 quadrant mode is the ideal solution to power such systems. Thanks to the 4Q functionality of the AC690+, the excess energy in the system is returned to the network and not dissipated in the form of heat through braking resistors. The current waveforms are almost sinusoidal, which minimizes network harmonics.

Benefits:
- Energy saving 
- No maintenance (No braking resistor) 
- Reducing the size of the supply required by distributing energy through the DC bus system 
- Reduced harmonics meeting the limits of IEEE 519 
- High power factor (cos ø ~1)