Torque Control Device for Hybrid Vehicle Generator Pulsation Suppression

The patent implements feedback control by detecting the actual rotating speed of the generator, comparing it with the target rotating speed, and adjusting the field current accordingly. The feedback control unit calculates the difference between target and actual rotating speeds, then adjusts the field current to minimize this difference, ensuring the generator operates at optimal efficiency while compensating for engine torque pulsation effects.

The patent applies preliminary action by pre-calculating the target rotating speed based on the required electric power and engine torque characteristic before the pulsation occurs. The control system anticipates the need for adjustment by continuously monitoring engine operating conditions and pre-positioning the generator at the optimal operating point before torque fluctuations affect power output.

The patent replaces the mechanical approach of using an oversized generator with sufficient torque capacity to physically suppress pulsations with a control-based solution. Instead of relying on mechanical torque reserves, the system uses electronic field control to adjust the generator's electromagnetic characteristics dynamically, achieving pulsation suppression without increasing generator physical size.

The patent applies parameter changes by dynamically adjusting the field current parameter to modify the generator's torque-speed characteristics in real-time. By changing the field current parameter in response to detected pulsations, the system achieves rotation speed stabilization without requiring the generator to be physically oversized, thus avoiding increased device complexity and cost.