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Electric motor voltage converter protecting equipment

A technology for protection devices and power converters, applied to emergency protection circuit devices, electrical components, etc., can solve problems such as burnout, accidents, and burned electric vehicles

Inactive Publication Date: 2009-03-18
吴国林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the converter may also be damaged. Once damaged, it may output 48V, so that once the auxiliary electrical device is turned on, it will be burned out due to overvoltage, which may cause accidents or even burn down the electric vehicle.

Method used

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  • Electric motor voltage converter protecting equipment
  • Electric motor voltage converter protecting equipment

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Embodiment Construction

[0013] In this embodiment, a protection device (2) is provided between the converter (1) and the auxiliary electrical appliance. The protection device (2) is composed of a fuse (fuse) (2-1), a relay (2-2) and several wires. The fuse (fuse) (2-1) is connected in series with the high level output of the converter (1), and the relay is connected to the output end of the fuse (fuse) (2-1) and connected in parallel with the converter (1).

[0014] When the converter (1) works normally, its output rated voltage is 12V, because the supplied power voltage does not reach the minimum voltage for the relay (2-2) to operate, the relay (2-2) will not operate, and the protection The device (2) outputs normally to the outside; when the converter (1) is damaged or its output voltage exceeds the rated operating voltage range of the consumer (the voltage selected in this embodiment is 18V), the action of the relay (2-2) is reached At this time, the relay (2-2) pulls in, causing an instantaneou...

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Abstract

The invention relates to a damaging and protecting device of a voltage convertor of an electric vehicle, wherein a protective device is arranged between a convertor and an auxiliary electric appliance. The protective device is formed by a fuse, a relay and a plurality of wires wherein the fuse is connected on a high level of the output of the convertor in series, the relay is connected on the output end of the fuse, and is connected with the convertor in parallel, once the convertor is damaged and the output voltage reaches or exceeds 48V after using, the protective device can rapidly work and automatically cut off external output of the convertor, thereby playing the function of preventing auxiliary electric appliances from being damaged.

Description

Technical field: [0001] The invention relates to a power converter protection circuit, in particular to a damage protection device for an electric vehicle voltage converter. Background technique: [0002] Among the electric vehicles currently in use, the rated operating voltage of many electric vehicle motors is 48V, and the auxiliary electrical appliances, such as horns, lighting headlights, turn signals, tail lights, instrument backlights, flashers, etc., have a rated operating voltage of 48V. It is 12V. If it is tapped from the battery pack, it will seriously affect the use and life of the battery. Therefore, a voltage converter is generally used to convert the 48V power supply into 12V through the converter to supply power to auxiliary appliances. However, the converter may also be damaged. Once damaged, it may output 48V, so that once the auxiliary electrical appliances are turned on, they will burn out due to overvoltage, which may cause accidents or even burn down the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/10
Inventor 吴国林
Owner 吴国林
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