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Control of an alternator-starter for a hybrid electric vehicle having a disconnected high-voltage battery

A hybrid power system, high-voltage technology, applied in the field of auxiliary power generation, can solve the problems of vehicle parking, excitation loss, loss of continuous auxiliary power generation on board, etc.

Inactive Publication Date: 2010-09-15
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to loss or insufficient field excitation, especially for motor / generator units based on asynchronous machines, which in turn can lead to loss of continuous auxiliary power generation on board
Insufficient auxiliary power can cause the vehicle to stop, resulting in a walk home event

Method used

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  • Control of an alternator-starter for a hybrid electric vehicle having a disconnected high-voltage battery
  • Control of an alternator-starter for a hybrid electric vehicle having a disconnected high-voltage battery
  • Control of an alternator-starter for a hybrid electric vehicle having a disconnected high-voltage battery

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Embodiment Construction

[0046] Referring now to the drawings, wherein these drawings are for the purpose of illustrating certain exemplary embodiments only and not for the purpose of limiting them, figure 1The propulsion system of the fuel-electric hybrid vehicle 10 is schematically shown. As constructed, the fuel-electric hybrid vehicle 10 includes an internal combustion engine (E) 12 rotatably coupled to a motor / generator unit (MGU) 26 and a transmission (T) 14 . The transmission 14 is configured to transmit tractive torque to the wheels 16 in response to control signals originating from a control module (C) 5 . In the several figures, the same reference numerals correspond to the same or similar parts.

[0047] The internal combustion engine 12 is mechanically rotatably coupled to a motor / generator unit 26 by a transmission system 23 comprising a serpentine belt or other suitable coupling mechanism. In one embodiment, the transmission system 23 comprises a serpentine belt between a pulley attach...

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Abstract

The present invention relates to control of an alternator-starter for a hybrid electric vehicle having a disconnected high-voltage battery. A hybrid powertrain system includes an electric motor / generator unit having a multiphase asynchronous AC machine electrically connected to a multiphase bridge inverter. A high-voltage capacitor is electrically connected between positive and negative sides of a high-voltage DC power bus. High-voltage DC bus pre-charge circuits are electrically connected between gate drive bias power supplies and the multiphase bridge inverter. A low-voltage battery electrically charges the high-voltage DC link capacitor via the gate drive bias power supplies and the high-voltage DC bus pre-charge circuits when the high-voltage energy storage system is disconnected from the high-voltage DC power bus.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 158,740, filed March 9, 2009, the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to electrical power flow in hybrid electric vehicles, and more particularly to auxiliary power generation when the high voltage battery is disconnected. Background technique [0004] The statements in this section merely provide background information related to the present invention and may not constitute prior art. [0005] Hybrid electric vehicles can selectively use different energy sources as needed to achieve optimal fuel efficiency. The vehicle may optionally use either or both of the internal combustion engine and the motor / generator unit(s) connected to a high voltage battery module or an energy storage system for propulsion and operational control. [0006] A vehicle includes a hybrid powertrain ...

Claims

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Application Information

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IPC IPC(8): B60W20/00B60W10/08B60W10/24H02J15/00
CPCY02T10/7066Y02T10/642H02P27/06B60K6/485Y02T10/7005B60L3/04B60L3/0046Y02T10/7241B60L3/0069H02P2201/07B60L2210/40B60L11/1868Y02T10/7077B60L2270/20B60L3/0092B60L11/14Y02T10/6226B60K2006/268B60L50/16B60L58/10B60L58/20Y02T10/62Y02T10/64Y02T10/70Y02T10/7072Y02T10/72
Inventor C·S·纳穆杜里B·M·路德维希K·D·范马宁S·戈帕拉克里什南
Owner GM GLOBAL TECH OPERATIONS LLC
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