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Vehicle-mounted low-voltage DC power conversion device

A technology of DC power supply and conversion device, which is applied in the direction of output power conversion device, conversion of DC power input to DC power output, circuit or fluid pipeline, etc., which can solve the problems of increased production cost, lack of development, high price, etc., and achieve saving The effect of production costs

Active Publication Date: 2017-03-01
HYUNDAI MOBIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the IC for generating the FB-ZVS signal that generates the PWM switching signal in the conventional LDC10 is an expensive component, and it is the main way to increase the production cost.
[0009] In addition, because the PWM generation circuit including the FB-ZVS signal generation dedicated IC is an analog circuit, it is necessary to find an effective alternative method due to the recent increase in the demand for all-round digital control, but there is still a lack of related development.

Method used

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  • Vehicle-mounted low-voltage DC power conversion device
  • Vehicle-mounted low-voltage DC power conversion device
  • Vehicle-mounted low-voltage DC power conversion device

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Embodiment Construction

[0030] The vehicle-mounted low-voltage DC power conversion device related to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] image 3 It is a block diagram of an LDC controller of a vehicle-mounted low-voltage DC power conversion device related to an embodiment of the present invention. Such as image 3 As shown, in the vehicle-mounted low-voltage DC power conversion device according to one embodiment of the present invention, the LDC controller 10 outputs PWM switching signals (S1+, S1-, S2+, S2-) to the input side MOSFET part.

[0032] The vehicle-mounted low-voltage DC power conversion device according to the embodiment of the present invention may include a transformer for sensing the AC voltage converted by the input-side MOSFET unit, and an output-side rectifying unit for converting the AC voltage stepped down by the transformer into a DC voltage output.

[0033] The input-side MOSFET part u...

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Abstract

The invention relates to a vehicle-mounted low-voltage DC power conversion device, which is characterized in that it includes: an LDC controller that generates and outputs PWM switching signals by using a preset output voltage command value and a built-in PWM S / W counting module; and , through a plurality of power switching elements switched by the PWM switching signal input from the LDC controller, the input side MOSFET part that converts the DC high voltage input from the outside to the AC high voltage. Therefore, the present invention utilizes the LDC controller to implement the PWM generation circuit in software, which includes the traditional FB-ZVS signal generation IC that generates the switching signal of the MOSFET part on the input side, etc., which can not only save production costs, but also realize comprehensive digitalization.

Description

technical field [0001] The invention relates to a vehicle-mounted low-voltage DC power conversion device. Specifically, it improves a high-speed PWM switching method, and is a vehicle-mounted low-voltage DC power conversion device for the purpose of saving production costs and realizing all-round digital control. Background technique [0002] figure 1 It is a schematic circuit diagram of a traditional vehicle-mounted low-voltage DC power conversion device (Low voltage DC-DC Converter, hereinafter referred to as LDC), figure 1 The LDC 10 shown converts the input voltage of the vehicle's high-voltage battery to a low voltage to power the on-board electronics. [0003] Such as figure 1 As shown, the LDC 10 receives the high voltage (Vin) of the high-voltage battery, and drives the power switching element (FET) of the MOSFET part 12 on the input side through the PWM switching signal generated according to the output voltage command of the LDC controller (not shown), Control t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCB60R16/033H02M1/083H02M3/335
Inventor 金元坤
Owner HYUNDAI MOBIS CO LTD