Dual Digital Servo Amplifier

DDSA

The AL-2006-DDSA-1A Dual Digital Servo Amplifier (DDSA) is a servo driver for brushless motors with sinusoidal as well as trapezoidal commutation. It drives both axes of the AL-4012 pedestal.

The DDSA is a DSP-based unit responsible for motor current, motor velocity and axis position control loops as well as comprehensive build-in test (BIT) of the entire pedestal.

The DDSA is able to close not only motor current loop, but also velocity and position loops providing overall control of a servo axis. Sinusoidal commutation is reducing EMI/RFI emission and overcoming torque ripple. Standard position and velocity sensors are supported, like three-phase tacho generator, sinusoidal or discreet Hall Effect sensors, incremental encoder (A-quad-B), Sin/Cos, SSI, and BiSS.

The DDSA supports several digital serial interfaces: UART, SPI and CAN bus.

The DDSA two Servo Drivers are based on a single DSP, which contains (within a single chip) the non-volatile memory, SRAM, CPU, most of the I/O requirements and communication peripherals.

Features

• Internal DC-DC converter enables for powering of both power stage and DSP from a single supply
• Brake switch mode power supply including current monitor circuit
• Discharge chopper
• Linear bus current & voltage sense for protective feature purpose
• Build-in temperature sensor

Input/Output

• Incremental Encoder Interface (A-quad-B)
• Sin/Con analog encoder interface
• Configurable General Purpose Inputs
• CAN bus
• JTAG interface for maintenance purposes
• Digital Hall Effect Input
• Analog Hall Effect Input