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Method and system for controlling power to be fed to electrical loads

A technology of control system and power supply system, which is applied in the direction of control system, control generator, electrical components, etc., and can solve problems such as response variation

Active Publication Date: 2008-10-22
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] However, when the field current supplied to the alternator is controlled to counteract changes in battery voltage, the regulation of the alternator output may become less responsive to changes in load power demand

Method used

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  • Method and system for controlling power to be fed to electrical loads
  • Method and system for controlling power to be fed to electrical loads
  • Method and system for controlling power to be fed to electrical loads

Examples

Experimental program
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no. 1 example

[0042] The following will refer to Figure 1 to Figure 3 A first embodiment of the present invention is described.

[0043] figure 1 An example of the circuit configuration of the power supply system PS mounted on the vehicle according to the first embodiment of the present invention is explained.

[0044] The power supply system PS is equipped with an alternator 101 as one example of various types of generators. The power supply system PS is also equipped with a controller 100 for controlling the output (output power) of the alternator 101 . The controller 100 may consist of hard-wired circuits, a microcomputer programmed to perform alternator output control operations, or a combination thereof. The power supply system PS is equipped with a bus 102 for power transmission, a battery 103, vehicle electrical loads 104a and 104b, and a current sensor 113 such as a circuit transformer (CT). In the first embodiment, the vehicle electrical load 104a causes a sharp change in the ...

no. 2 example

[0097] The following will refer to Figure 4 to Figure 7 A second embodiment of the present invention is described.

[0098] Figure 4 An example of an electric system of a vehicle-mounted power supply system PS2 for supplying electric power to an electric assist turbocharger 301 as one of vehicle electric loads according to a second embodiment of the present invention is explained.

[0099] The electrically assisted turbocharger 301 is equipped with a turbocharger 302 and a three-phase synchronous electric motor 303 directly connected to the common rotation shaft of the turbocharger 302 .

[0100] For example, turbocharger 302 includes a turbine (turbine wheel) attached to one end of a rotating shaft configured to be driven by engine exhaust. The turbocharger 302 also includes a compressor (compressor wheel) connected to the other end of the rotating shaft.

[0101] In particular, the turbine of the turbocharger 302 may be used to rotate based on dissipated energy in the eng...

no. 3 example

[0186] The third embodiment of the present invention will refer to Figures 9 to 11 This is described below.

[0187] The power supply system according to the third embodiment of the present invention has, for example, with Figure 4 The power supply system PS2 shown has the same electrical system structure. Note that the elements of the power supply system according to the third embodiment are basically the same as Figure 4 Those elements of the power supply system PS2 according to the second embodiment shown are the same, and are used with Figure 4 indicated by the same mark. The description of the components of the power supply system according to the third embodiment of the present invention is therefore omitted or simplified.

[0188] In the third embodiment, the controller 308 has a timer for counting time. In addition, the memory of the controller 308 stores the intermediate limit power value Path1, which is preset so as not to be greater than the maximum allowab...

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PUM

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Abstract

In a control system, a control unit is connected to a generator and is configured to, when a steep change in a load current flowing through at least one specific electrical load is sensed, control the output of the generator based on the sensed steep change in the load current. This allows variations in a voltage of a power supply system to decrease while converging the voltage of the power supply system to a predetermined target voltage.

Description

[0001] Cross References to Related Applications [0002] This application is based on Japanese Patent Applications 2004-273915 and 2004-284555 filed on September 21, 2004 and September 29, 2004, respectively. The description thereof is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to methods and systems for controlling power supplied to electrical loads. In particular, the present invention relates to methods and systems for controlling the output of a generator to vary with the power demand of an electrical load. Background technique [0004] An alternator is generally used as a generator for a vehicle. The alternator has field windings and can regulate field current flowing therethrough to control the alternator output (output power). The alternator output is provided to the vehicle electrical load, hereinafter referred to as the load, and the battery. [0005] For example, the load includes an electrically ass...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/00F02B37/10
CPCY02T10/144Y02T10/12
Inventor 大林和良藤纲雅己
Owner DENSO CORP