503 Low Power Torque Amplifier
The 503 is a compact and cost effective amplifier for torque control of brushless motors. Commutation information is derived from Hall sensors. Loop gains and continuous/peak current limits are set by a component header that can be shipped pre-configured for optimal performance. No potentiometer adjustments are required.
5xx1 Torque/Velocity Amplifiers
Operating from transformer-isolated DC supplies, the 5xx1 family provides a cost-effective solution for multi-axis brushless motor control. Trapezoidal commutation information is derived from Hall sensors. In velocity mode, feedback from a brush-tachometer is standard. An optional interface is available for encoder and Hall velocity feedback.
For optimal velocity control near zero speed, tachometer feedback is preferred. Encoder based velocity loops have a wide a speed range with velocity ripple performance near zero speed to meet the need of most applications. Hall derived velocity feedback is best applied in high speed applications such as spindles.
5xx4AC Offline Torque/Velocity Amplifiers
The 5xx4 series is a compact, offline solution for velocity and torque control of brushless servomotors. A 3 kHz bandwidth current loop ensures high performance torque control. Carrier Cancellation modulation is employed for zero crossover distortion. For noise sensitive environments, an optional Internal edge filter is available to minimize PWM switching noise.
In velocity mode, various performance levels can be achieved by deriving velocity feedback from the encoder, Halls or motor back-emf. Encoder based velocity loops have a wide speed range with low velocity ripple near zero speed. Halls work well for high speed applications such as spindles. Back-emf feedback is a very cost-effective solution for open-loop speed control.