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Low voltage dc-dc converter for vehicle and method of controlling the same

A technology of DC-DC and converter, which is applied in the field of low-voltage DC-DC converter and its control, and can solve problems such as poor controllability

Pending Publication Date: 2019-09-10
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the capacitance of the capacitor is increased to reduce the maximum voltage of the main switch, the resonant frequency of the capacitance and inductance may be located within the frequency band to stably control the low-voltage DC-DC converter, which results in poor controllability

Method used

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  • Low voltage dc-dc converter for vehicle and method of controlling the same
  • Low voltage dc-dc converter for vehicle and method of controlling the same
  • Low voltage dc-dc converter for vehicle and method of controlling the same

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Embodiment Construction

[0022] Hereinafter, a low voltage DC-DC converter for a vehicle and a control method thereof according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

[0023] figure 2 is a diagram showing a circuit configuration of a low voltage DC-DC converter according to an exemplary embodiment of the present invention. Such as figure 2 As shown, the low voltage DC-DC converter according to the exemplary embodiment of the present invention may be configured to include a switching circuit 100 , a transformer 200 , a current sensor 300 and a controller 400 .

[0024] Specifically, the switching circuit 100 includes a plurality of capacitors and a plurality of switches, and is used to convert a high voltage output by a high voltage battery into an AC voltage. refer to figure 2 The switching circuit 100 may be configured to include a first capacitor 110 , a second capacitor 120 , a first switch 130 , a second switch 140 ...

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Abstract

The present invention discloses a low voltage DC-DC converter for a vehicle and a control method thereof. The low voltage DC-DC converter for a vehicle includes: a switching circuit including a plurality of capacitors and a plurality of switches and converting a high voltage output from a high voltage battery into an AC voltage; a transformer converting the AC voltage output from the switching circuit into a low voltage; a current sensor measuring a current value output from the transformer; and a controller comparing the current value measured by the current sensor with a reference value to determine whether a current mode is a continuous current mode or a discontinuous current mode, and controlling one of the plurality of switches to be turned on or off as the determination result.

Description

technical field [0001] The present invention relates to a low-voltage DC-DC converter and its control method for vehicles, and more particularly, to a method capable of improving the controllability of the low-voltage DC-DC converter while reducing the low-voltage DC-DC converter. A low-voltage DC-DC converter for a vehicle and a method of controlling the internal pressure of the switch. Background technique [0002] In general, a hybrid vehicle includes a high-voltage main battery as a fuel cell and a low-voltage auxiliary battery for supplying voltage to each electric load of the vehicle. In addition, a low voltage DC-DC converter (LDC) for reducing the voltage output from the main battery is provided between the main battery and the auxiliary battery. [0003] figure 1 The circuit structure of a conventional low-voltage DC-DC converter is shown. refer to figure 1 , in the circuit of a conventional low-voltage DC-DC converter, the maximum voltage of the main switch is ...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/33523H02M3/33569H02M3/33546Y02B70/10Y02T10/70Y02T10/92Y02T10/7072Y02T90/14H02M1/0032H02M1/342H02M3/335B60L53/20B60L58/10B60L2240/527B60L2210/10B60Y2200/92H02M1/08
Inventor 李岱雨李宇宁崔珉诚河泰宗车栽银杨真明吕寅勇
Owner HYUNDAI MOTOR CO LTD
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