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Retarding grid cooling system and control

A technology of cooling system and deceleration grid, applied in cooling/ventilation device, deceleration device of AC motor, electromechanical device, etc., can solve the problem of undetectable temperature of insulator

Inactive Publication Date: 2013-05-22
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insulator temperatures resulting from such hot spot or overshoot conditions may well exceed allowable thresholds and remain undetectable by currently existing cooling controls and associated temperature monitors

Method used

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  • Retarding grid cooling system and control
  • Retarding grid cooling system and control
  • Retarding grid cooling system and control

Examples

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Embodiment Construction

[0013] Reference will now be made in detail to certain embodiments or features, examples of which are illustrated in the accompanying drawings. Generally, corresponding reference numerals indicate the same or corresponding parts throughout the drawings.

[0014] figure 1 An exemplary cooling system 100 applied to a reduction assembly 102 of an electrically driven machine 104 such as an off-road truck is schematically shown. In addition to reduction assembly 102 , a typical electrically driven machine 104 may include an engine 106 , a generator 108 , a rectifier circuit 110 , an inverter circuit 112 , an electric motor 114 , and one or more final drive wheels 116 . The reduction assembly 102 may be arranged at the output of the inverter circuit 112 . The cooling system 100 may be integrated with the speed reduction assembly and also arranged at the output of the inverter circuit 112 .

[0015] During acceleration or when machine 104 is being propelled, work may be transferre...

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PUM

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Abstract

A cooling system (100) for a retarding grid (118) having a plurality of resistors (120) and insulators (122) is provided. The cooling system (100) may include a blower (130) configured to actively cool the retarding grid (118) and a controller (134) configured to selectively enable the blower (130). The controller (134) may enable the blower (130) based on thermal characteristics of the resistors (120) and the insulators (122) of the retarding grid (118). The thermal characteristics may include a current resistor temperature and a projected insulator temperature.

Description

technical field [0001] The present disclosure relates generally to retarding assemblies, and more particularly to systems and methods for cooling retarding grids. Background technique [0002] A machine's electric drive system typically includes a power circuit that selectively energizes an electric motor at a desired torque. The electric motor is usually connected to the wheels or other traction device used to propel the machine. A hybrid drive system includes a prime mover, eg, an internal combustion engine that drives an electrical generator. The generator generates electricity for driving the electric motor. When the machine is propelled, the mechanical work produced by the engine is converted into electricity by the generator. This power is typically processed and / or conditioned before being provided to the motor. Electric motors convert electricity back into mechanical work to drive the wheels and propel the vehicle. [0003] The machine is decelerating in an oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K9/06
CPCH02P3/22
Inventor J·王J·博尔歇特B·格特莫勒B·拜利
Owner CATERPILLAR INC