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Vehicle generated voltage control device

A technology for voltage control and vehicle use, applied in battery circuit devices, circuit devices, control systems, etc., can solve problems such as vehicle voltage barriers, achieve the effects of preventing overcharging and improving reliability

Inactive Publication Date: 2012-07-04
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the past, when the monitoring and detection circuit failed, for example, in the case of a leakage failure of the filter capacitor, a failure of the continuous output of the voltage comparator circuit, or an open circuit failure in the circuit, the control voltage became higher than the original expected value. Or low, which will bring a major obstacle to the vehicle voltage (the output voltage of the vehicle generator, etc.)

Method used

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  • Vehicle generated voltage control device
  • Vehicle generated voltage control device
  • Vehicle generated voltage control device

Examples

Experimental program
Comparison scheme
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Embodiment approach 1

[0017] figure 1 It is a configuration diagram showing a vehicle power generation voltage control device according to Embodiment 1 of the present invention. The vehicle generator 1 includes a three-phase stator winding 2 included in the stator, an excitation winding 3 included in the rotor, and a rectifier circuit 4 that performs full-wave rectification on the three-phase output of the stator winding 2 . Use the voltage control device 7 to control the excitation current of the field winding 3 on or off, so as to output the output voltage of the output terminal 5 of the vehicle generator 1 (or the terminal voltage of the battery 6 connected to the generator) Take control. The output terminal 5 is connected to a battery 6 and various electric loads 8 via charging lines. The ground terminal 9 is connected to the frame of the vehicle generator 1 . Terminal 10 is connected to ECU 5 as an external control device.

[0018] The semiconductor switching element 12 is connected in ser...

Embodiment approach 2

[0038] Figure 4 It shows the main part of the voltage control apparatus in Embodiment 2, and is a figure which shows the structure which realized partly by software. In Embodiment 2, three monitoring detection circuits are provided for one detection object. The description will mainly focus on the parts that are different from Embodiment 1. FIG. The resistor R11 and the resistor R12 divide the voltage of the output terminal 5 , that is, the input voltage. The capacitor C1 holds the voltage of the connection point between the resistor R11 and the resistor R12. The first input voltage holding circuit 31 is constituted by the resistor R11, the resistor R12, and the capacitor C1. Likewise, resistors R21 and R22 divide the input voltage. The capacitor C2 holds the voltage of the connection point between the resistor R21 and the resistor R22. The second input voltage holding circuit 32 is constituted by the resistor R21, the resistor R22, and the capacitor C2. The resistor R3...

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Abstract

Provided is a vehicle generated voltage control device, in which even when a monitoring / detection circuit fails to operate, reliability during the failure period is enhanced with respect to controlling the excitation current flowing through the field winding. In the device, a plurality of monitoring / detection circuits each detect the output voltage of a vehicle generator or a terminal voltage of a battery connected to the vehicle generator. Based on the outputs of the monitoring / detection circuits, the output voltage of the vehicle generator or the terminal voltage of the battery connected to the vehicle generator is then controlled to a target voltage by flowing and cutting off the excitation current flowing through the field winding of the vehicle generator.

Description

technical field [0001] The present invention relates to a vehicle generated voltage control device for controlling the generated voltage of a vehicle generator mounted on a car, truck, or the like. Background technique [0002] Among vehicle power generation voltage control devices, there is a vehicle power generation voltage control device including a voltage control device that turns on or off a switching element connected in series with a field winding of a vehicle generator to control the power generation of the vehicle. The output voltage of the generator or the terminal voltage of the battery connected to the vehicle generator is controlled to a target voltage. For one detection object (control object), the voltage control device generally has one input voltage monitoring and detection circuit. For multiple detection objects, sometimes there is only one monitoring detection circuit. [0003] In the past, when the monitoring and detection circuit failed, for example, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/14
CPCH02J7/14H02P9/14H02P9/48H02P9/305H02P2009/002H02P2101/45H02J7/00302H02J7/0047
Inventor 住本胜之佐佐木润也
Owner MITSUBISHI ELECTRIC CORP