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BUS VOLTAGE STABILIZATION IN POWERTRAIN HAVING ELECTRIC STARTER SYSTEM WITH POLYPHASE BRUSHLESS STARTER MOTOR
BUS VOLTAGE STABILIZATION IN POWERTRAIN HAVING ELECTRIC STARTER SYSTEM WITH POLYPHASE BRUSHLESS STARTER MOTOR
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机译:带有多相无刷起动电动机的电动起动系统的动力总成中的总线电压稳定
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摘要
An electric starter system is usable with an engine and a power inverter module (PIM), e.g., of a powertrain. The starter system includes a polyphase/AC brushless starter motor connected to the PIM via an AC voltage bus and selectively connected to the engine during a requested engine start event. A sensor on the DC voltage bus outputs a signal indicative of a voltage level of the DC voltage bus. The controller executes a method using voltage stabilization logic having a proportional-integral (PI) torque control loop. Logic execution in response to the requested engine starting event causes the controller to control the starter motor, when the bus voltage exceeds a calibrated minimum voltage, using a starting torque determined via the control loop. The commanded starting torque limits inrush current to the starter motor such that the DC voltage bus remains above the minimum voltage.
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