Easing vibration of the engine speed of Alternator Control IC TLE8880 (KA-01062)
When the engine works at the idle speed and an electric load is suddenly switched on, a speed vibration or hunting may occur due to a sudden anti-torque from the alternator.
There are 2 ways to reduce the anti-torque for TLE8880.
i) Load Response Control (LRC)
The LRC rise time should be set to as long as possible so that the excitation duty cycle will ramp up instead of a sudden change.
Although not introduced in the datasheet, Ki-Kp-Switching function can further reduce the anti-torque generated by alternator when the single LRC is not enough. The principle of the Ki-Kp-Switching is shifting the PI-controller's parameters to a slower set at the low speed to get a slower dynamic response.