VEHICLE WITH SELECTIVELY ENABLED BOOST CONVERTER

摘要

A vehicle includes a transmission, energy storage system (ESS), power inverter module (PIM), and controller. The PIM includes a boost converter having a bypass switch and a first plurality of switches, and also a power inverter having a second plurality of switches. The controller is programmed to execute a method that enables a DC boost converter of the PIM by opening the bypass switch when a speed and a torque of the electric machine are within a predetermined boost range. The controller bypasses the boost converter by transmitting a second switching signal closing the bypass switch when the speed and torque are not within the predetermined boost range. A voltage input to the power inverter is equal to the DC battery voltage whenever the boost converter is bypassed and exceeds the DC battery voltage whenever the boost converter is enabled.

主权项

1. A vehicle comprising:
a transmission having a polyphase electric machine; an energy storage system (ESS) having a direct current (DC) battery pack with a DC battery voltage; a power inverter module (PIM) that is electrically connected to the ESS and includes:
a DC boost converter configured for having a bypass switch and a first plurality of switches; anda power inverter having a second plurality of switches; and a controller in communication with the bypass switch and with the first and second plurality of switches, wherein the controller is programmed to enable the DC boost converter by opening the bypass switch via a first switching control signal when a speed and a torque of the electric machine are within a predetermined boost range, and to bypass the DC boost converter by transmitting a second switching signal closing the bypass switch when the speed and torque are not within the predetermined boost range, such that a voltage input to the power inverter is equal to the DC battery voltage whenever the DC boost converter is bypassed and exceeds the DC battery voltage whenever the DC boost converter is enabled.