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Control method and device of DCDC converter

A control method and technology of a control device, which are applied in the field of vehicles, can solve the problems of increased shift time, inability to respond to motor power demand in time, etc., and achieve the effect of timely response

Active Publication Date: 2017-10-27
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing DCDC converter may not be able to respond in time to the power demand of the motor powered by the 12V voltage, resulting in increased shift time

Method used

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  • Control method and device of DCDC converter
  • Control method and device of DCDC converter
  • Control method and device of DCDC converter

Examples

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Embodiment Construction

[0032] In the prior art, an electric motor is provided in the electronically controlled clutch, which is usually powered by a DCDC converter to drive the electronically controlled clutch to work. When performing gear selection and shifting operations, a gear selection motor and a gear shifting motor are usually used to realize gear selection and gear shifting, and both the gear selection motor and the gear shifting motor can be powered by a DCDC converter. The maximum input power of the motor in the electronically controlled clutch is about 700 watts, and the maximum input power of the gear selection motor and the shifting motor is also about 700 watts. The required input power of the above-mentioned motors during work is all relatively large.

[0033] When the motor powered by the DCDC converter is to be started, the DCDC converter may not be able to respond to the power demand of the motor in time due to the large power required by the motor and the large load on the DCDC con...

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PUM

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Abstract

The invention discloses a control method and device of a DCDC converter. The control method comprises the steps of calculating a time needed by synchronous speed regulation of a drive motor when detecting that the drive motor with the power supplied by a high-voltage battery requires synchronous speed regulation; when detecting that the time needed by synchronous speed regulation is beyond a preset duration and if a downshifting operation is carried out, calculating the power required to be consumed by synchronous speed regulation of the drive motor during the downshifting, and when the power required to be consumed is bigger than an available discharge power of the high-voltage battery, controlling to decrease the power use of the high-voltage battery by a low-voltage system and reducing a charging voltage setting point value of the DCDC converter; and if an up-shifting operation is carried out, calculating the charging power during the synchronous speed regulation and during the up-shifting period, and when the charging power is bigger than the available charging power of the high-voltage battery, controlling to increase the power use of the high-voltage battery by the low-voltage system and increasing the charging voltage setting point value of the DCDC converter. By adoption of the control method and device of the DCDC converter, the DCDC converter can respond to the work demands of the motor in time.

Description

technical field [0001] The present invention relates to the field of vehicles, in particular to a DCDC converter control method and device. Background technique [0002] A hybrid vehicle refers to a vehicle in which the vehicle drive system is composed of multiple single drive systems that can operate simultaneously. The driving power of the vehicle is provided individually or jointly by a single drive system according to the actual vehicle driving state. The so-called hybrid vehicle generally refers to a hybrid electric vehicle (Hybrid Electric Vehicle, HEV), that is, a traditional internal combustion engine and an electric motor are used as power sources. [0003] In a hybrid electric vehicle, the power consumption of the on-board equipment is usually realized by a DC-to-DC (DCDC) converter, which converts the output voltage of the high-voltage battery into a voltage of 12V to supply power for the on-board equipment. Electric shift actuators and electronically controlled ...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/44B60L11/18B60L15/24
CPCB60L15/24B60L53/20H01M10/44H02J7/007Y02E60/10Y02T10/64Y02T10/70Y02T10/7072Y02T10/72Y02T10/92Y02T90/14
Inventor 冷宏祥邱国茂汪中密刚刚汪巅田武岭
Owner SAIC MOTOR