SLLSFU1A December 2023 – July 2024 MCF8315C
PRODMIX
During closed loop acceleration/deceleration, MCF8315C provides the option of configuring the slew rate of the speed reference input to the speed PI controller (SPEED_REF_SLEW in Figure 6-33). This allows for a linear change in speed reference input (SPEED_REF_SLEW) even when there is a step change in speed reference (SPEED_REF from Analog, PWM, Frequency or I2C) as seen in Figure 6-34. This slew rate can be configured so as to prevent sudden changes in the torque applied to the motor which could result in acoustic noise. The closed loop acceleration/deceleration slew rate parameter, CL_ACC/CL_DEC, sets the slew rate of SPEED_REF_SLEW during acceleration and deceleration (when AVS is not active) respectively.