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A high-reliability constant-current vehicle-mounted dcdc converter and its control method

A reliability and converter technology, applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc., can solve the problem of not reaching automotive grade, stability, reliability and durability need to be improved problem, to achieve the effect of high work efficiency, satisfying work reliability, work efficiency and stability

Active Publication Date: 2017-06-06
浙江郡逸科技有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] 1) The design of the DCDC converter can only meet the needs of the industrial level, but cannot meet the requirements of the complex, changeable and extreme working conditions of the automotive level;
[0007] 2) The stability, reliability and durability of existing products need to be improved

Method used

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  • A high-reliability constant-current vehicle-mounted dcdc converter and its control method
  • A high-reliability constant-current vehicle-mounted dcdc converter and its control method
  • A high-reliability constant-current vehicle-mounted dcdc converter and its control method

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Embodiment Construction

[0039] The specific implementation manner of the present invention will be described in more detail below with reference to schematic diagrams. 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.

[0040] Such as figure 1 , figure 2 , Figure 3a with Figure 3b As shown, this embodiment provides a high-reliability constant-current vehicle-mounted DCDC converter, which supports CAN bus-based Unified Diagnostic Services (UDS) refresh, and the high-reliability constant-current vehicle-mounted DCDC converter includes:

[0041] Such as figure 2 As shown, the control circuit module, the control circuit module includes a single-chip microcomputer system and an auxiliary power supply, the control circuit mod...

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Abstract

The invention provides a high-reliability constant-current vehicle-mounted DC (direct current)-DC converter comprising a control circuit module and a power circuit module. The power circuit module comprises a main circuit, a third subtractor, a first comparator, a PWM (pulse width modulation) regulator and a drive circuit. The main circuit outputs voltage error signals and minimum error signals in current error signals and inputs the minimum error signals into the first input end of the third subtractor, the second input end of the third subtractor inputs current measurement signals to the main circuit, the output end of the third subtractor is connected with the main circuit sequentially through the PWM regulator and the drive circuit, the input end of the first comparator inputs one-by-one periodic current restricting signals and the current measurement signals, and the output end of the first comparator is connected with the PWM regulator. The high-reliability constant-current vehicle-mounted DC-DC converter has the advantages that the DC-DC converter is designed aiming at strict design indexes and complex vehicle model environments, so that high power density, high-stability voltage output and high conversion efficiency are obtained.

Description

technical field [0001] The invention relates to the technical field of automotive electronics, in particular to a high-reliability constant-current vehicle-mounted DC-DC converter and a control method. Background technique [0002] Domestic DCDC converters are mainly used in the fields of computers, industrial instruments, aerospace and automatic control equipment, especially 6-25W converters are the most widely used. After 2000, with the rapid development of microelectronics technology and the maturity of PWM switching technology, DCDC converters have been mass-produced commercially, and the increase in power and switching frequency has become an inevitable trend of its development. However, the vehicle-mounted DCDC converter technology is still in the research and development stage in China, and has not yet formed a product that can be actually applied in batches. [0003] The on-board DCDC converter converts the DC voltage of the power battery nominal output (generally a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02H7/12
CPCH02H7/1213H02M3/33523
Inventor 刘孝涛
Owner 浙江郡逸科技有限公司
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