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A DC-DC converter circuit for automobile and its control method

A DC converter and circuit technology, applied in DC power input conversion to DC power output, control/regulation systems, instruments, etc., can solve problems such as low-voltage power supply and large current loss, reduce wiring copper loss, improve efficiency, and improve reliability effect

Active Publication Date: 2017-07-28
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with more and more vehicle-mounted electrical equipment, the problem of large current loss in low-voltage power supply is gradually reflected.

Method used

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  • A DC-DC converter circuit for automobile and its control method
  • A DC-DC converter circuit for automobile and its control method
  • A DC-DC converter circuit for automobile and its control method

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Embodiment Construction

[0028] A DC-DC converter circuit for automobiles and a control system thereof, the circuit comprises a converter main circuit and a control circuit. The converter main circuit includes an input filter inductor, a modular power MOS transistor half-bridge circuit and a common energy transfer capacitor, and the control circuit includes a digital signal controller and a sampling filter circuit.

[0029] As an improvement of the present invention, the main circuit is a low-voltage power distribution circuit, and the main circuit of the converter includes an input filter capacitor C1, a first filter inductor L1, a second filter inductor L2, a third filter inductor L3, a first power MOS transistor S1 and its freewheeling diode D1, second power MOS transistor S2 and its freewheeling diode D2, third power MOS transistor S3 and its freewheeling diode D3, fourth power MOS transistor S4 and its freewheeling diode D4, The fifth power MOS transistor S5 and its freewheeling diode D5, the six...

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Abstract

The invention discloses an automotive DC-DC converter circuit and a control method thereof in the automotive field. The circuit includes a converter main circuit and a control circuit, the converter main circuit includes an input filter inductor, a modular power MOS tube half-bridge circuit and a shared energy transfer capacitor, and the control circuit includes a digital signal controller and a sampling filter circuit . The circuit topology proposed by the present invention can flexibly boost the input voltage to realize energy transfer between the high and low voltage sides. The algorithm reduces the power loss of the energy transfer capacitor and improves the reliability of the circuit. This design can be used in the low-voltage power supply system of electric vehicles.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to an automobile low-voltage power supply circuit. Background technique [0002] The control elements, sensors, electric actuators, in-vehicle communication and entertainment systems of the car all depend on the power supply, usually using the on-board generator and 12V battery as the auxiliary power supply. However, with the increasing number of on-board electrical equipment, the problem of large current consumption of low-voltage power supply is gradually reflected. Increasing the existing low voltage by one level can reduce the current in the vehicle power supply system, improve the efficiency of the vehicle and reduce electromagnetic interference. SUMMARY OF THE INVENTION [0003] The invention proposes a low-voltage power supply circuit control system for automobiles and a control method thereof. The circuit topology proposed by the invention can flexibly boost the input voltage a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155
Inventor 蒋伟陆惠阳朱玉如华英徐松
Owner YANGZHOU UNIV
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