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Easing vibration of the engine speed of Alternator Control IC TLE8880 (KA-01062)

Easing vibration of the engine speed of Alternator Control IC TLE8880 (KA-01062)

BinduPriya_G
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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)
ii) Ki-Kp-Switching.
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.

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