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Direct-current bus voltage monitoring system and method

A DC bus voltage and monitoring system technology, applied in the direction of measuring current/voltage, measuring only voltage, measuring electrical variables, etc., to achieve the effect of improving the diagnostic coverage

Pending Publication Date: 2020-04-10
UNITED AUTOMOTIVE ELECTRONICS SYST
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Problems solved by technology

[0007] The purpose of the present invention is to provide a DC bus voltage monitoring system and method to solve the problems existing in the DC bus voltage monitoring method in the prior art

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Embodiment Construction

[0034] The DC bus voltage monitoring system and method proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0035] Please refer to figure 1 , which is a schematic diagram of the DC bus voltage monitoring system of the present invention, such as figure 1 As shown, the DC bus voltage monitoring system includes: a first DC bus voltage acquisition module 11, a second DC bus voltage acquisition module 12 and a verification module 3; the first DC bus voltage acquisition module 11 is used for The first path obtains the first DC bus voltage; the second DC bus voltage...

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Abstract

The invention provides a direct-current bus voltage monitoring system and method. The direct-current bus voltage monitoring method comprises the steps: performing sampling respectively based on a first path and a second path to obtain a first direct-current bus voltage and a second direct-current bus voltage; and performing range verification and mutual comparison verification on the first direct-current bus voltage and the second direct-current bus voltage. On the basis of the direct-current bus voltage monitoring method, the direct-current bus voltages can be obtained through two paths, so that redundancy design of direct-current bus voltage sampling is realized and the diagnosis coverage rate of direct-current bus voltage sampling is increased; in addition, range verification and mutualcomparison verification are carried out on the direct-current bus voltages obtained through the two paths, so that the requirement of the ISO26262 standard for the high diagnosis coverage rate of sampling is met and thus four kinds of failures required by the ISO26262 standard can be diagnosed.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a DC bus voltage monitoring system and method. Background technique [0002] With the rapid development of new energy vehicles, the core technology "three electrics" (ie battery, electric control, motor) is more and more valued by the automobile industry. Among them, the electric control is the abbreviation of the motor controller, and its main function is to invert the high-voltage direct current of the battery into the alternating current for driving the motor, which is the core component of the entire electric drive system. [0003] With the continuous introduction of a large number of electrical and electronic components into the vehicle, while bringing control convenience and diversity, it also brings certain risks to the safety of the vehicle due to unavoidable systematic failures and random hardware failures. The ISO26262 standard was born in response to this risk. Th...

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Application Information

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IPC IPC(8): G01R19/00
CPCG01R19/0084
Inventor 宋俊峰黄文卿闫岩姜海龙陈雪平
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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