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Method and system for operating a motor to reduce noise in an electric vehicle

A technology for electric motors and automotive drive systems, applied in electric vehicles, AC motor control, motors, etc., can solve problems such as bad noise and high-frequency current pulsation

Active Publication Date: 2008-12-03
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The converter switching frequency often reaches and excites various resonant frequencies in the DC bus which will cause unwanted noise in the vehicle and high frequency current pulsations on the DC bus

Method used

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  • Method and system for operating a motor to reduce noise in an electric vehicle
  • Method and system for operating a motor to reduce noise in an electric vehicle
  • Method and system for operating a motor to reduce noise in an electric vehicle

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Embodiment Construction

[0020] The following description is actually only exemplary and is in no way intended to limit the present invention or the application and use of the present invention. Moreover, it is not intended to be limited by the explicit or implied principles appearing in the foregoing technical field, background art, brief introduction or the following detailed description.

[0021] The following description refers to elements or parts being "connected" or "coupled" together. Unless specifically stated otherwise, the "connection" used in the text refers to the direct connection (or direct communication) between one element / part and another element / part, and not necessarily mechanically. Likewise, unless specifically stated otherwise, “coupled” means that one element / part and another element / part are directly or indirectly connected (or directly or indirectly communicated), and not necessarily mechanically. However, it should be recognized that although two elements are described as being ...

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PUM

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Abstract

Methods and systems for operating a motor coupled to an electrical bus in a vehicle are provided. Selected resonant frequencies of the electrical bus are determined. The selected resonant frequencies include a low resonant frequency and a high resonant frequency. Power is provided to the motor through at least one switch operating at a switching frequency. The switching frequency is controlled as a function of a rate of operation of the motor.; The function is characterized by one of a first substantially linear portion having a first slope when the switching frequency is less than or equal to a selected switching frequency and a second substantially linear portion having a second slope if the switching frequency is greater than the selected frequency, the selected switching frequency being greater than the low resonant frequency and a substantially linear portion having a y-intercept being greater than the low resonant frequency.

Description

Technical field [0001] The present invention relates generally to automobiles, and in particular to methods and systems for operating electric motors to reduce noise in electric vehicles, such as hybrid vehicles. Background technique [0002] In recent years, technological developments and constant styling attempts have caused major changes in car design. One change lies in the complexity of the electrical systems in automobiles, especially alternative fuel vehicles such as hybrid vehicles, electric vehicles, and fuel cell vehicles. These alternative fuel vehicles usually use one or more electric motors, perhaps in conjunction with another actuator to drive the wheels. In addition, this kind of automobile may also include other electric motors and other high-voltage components to operate other various systems in the automobile, such as air conditioning. [0003] Due to the fact that alternative fuel vehicles usually have only one direct current (DC) power source (eg, battery), a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48H02M1/44H02M1/14B60L11/00
CPCB60L2270/142H02M1/14H02P27/08Y02T10/642Y02T10/64
Inventor N·R·帕特尔M·N·安瓦S·希蒂B·A·韦尔奇科S·E·舒尔茨L·M·塔拉里科
Owner GM GLOBAL TECH OPERATIONS LLC
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