» Precision Amplifiers
ACD 4000
The ACD 4000 is a fully digital servo amplifier designed for long life in extended temperature environments for applications such as RADAR, Power Generation, and other remote applications without environmental controls. The amplifier can control up to a 4000 Watt (5HP) BLDC servo motor in torque or velocity loop mode and can be digitally configured for a wide range of motors.
The amplifier is mounted on a rigid aluminum base plate and may be enclosed by an optional metal cover. In addition to providing the mechanical stability of the package, the base plate provides significant thermal mass, benefiting high crest factor applications, as well as a low thermal interface impedance for conduction of the average power dissipation of the amplifier. It is intended that the base plate will be mounted on a surface that removes heat such that the base plate temperature does not exceed 60° C, although temperatures up to 80° C are allowed with current derating.
To protect the amplifier and the motor, two different algorithms are used to track the thermal impact of the output current. The amplifier is protected using an advanced, real-time adaptive thermal model developed to limit extreme thermal cycling of the power devices as well as control their maximum junction temperature. At the same time, the amplifier protects the motor from thermal degradation by using a user programmable time constant and limit threshold applied to an independently maintained RMS current value. Short circuit and instantaneous over-current conditions are detected through multiple means, providing the redundancy necessary to achieve high system reliability. A tri-state (Red/Yellow/Green) LED provides a visual indication of the status of the amplifier.
Features & Benefits
- High Temperature Operation – Base plate operating range of -40 to 80°C
- Advanced Commutation –Space Vector Commutation for better bus voltage utilization for improved torque/speed curves compared with standard sinusoidal or trapezoidal commutation
- Sensorless Control – Option to eliminate the Resolver and Resolver cable without sacrificing the advantages of the advanced commutation
- Flux Vector Current Control – Provides improved current utilization
- Digital Tuning – Optimizes performance, enables cloning, eliminates pot drift, and can reduce inventory
- “Get Me Home” Over-Temperature Mode – provides warning and linear reduction of current limit to allow continued operation at a reduced capacity for a controlled shutdown
- Extensive Fault Protection – designed to protect the components, the amplifier, and the motor
- Electrical Isolation – Eliminates need for external isolation circuits
- Diagnostics and Health Monitoring – includes the simplicity of status LED's and the detailed data from serial port reports
- Customization - PCI can modify the drive to make it compatible with an OEM’s system