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Control device of multi-phase converter and power supply system

A control device, converter circuit technology, applied in the direction of control system, control device, output power conversion device, etc., can solve the problem of conversion efficiency reduction, and achieve the effect of suppressing the reduction of conversion efficiency

Pending Publication Date: 2021-05-28
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, since only one converter circuit is originally driven depending on the magnitude of the input current, all the converter circuits are driven, so there is a possibility that the conversion efficiency may decrease.

Method used

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  • Control device of multi-phase converter and power supply system
  • Control device of multi-phase converter and power supply system
  • Control device of multi-phase converter and power supply system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0024] [Brief structure of fuel cell system]

[0025] figure 1 It is a configuration diagram of a fuel cell system 1 mounted on a vehicle. The fuel cell system 1 includes a power control system 3 , an ECU (Electronic Control Unit) 4 , a secondary battery (hereinafter referred to as BAT) 7 , and a fuel cell stack (hereinafter referred to as FC) 10 . The power control system 3 includes a battery converter (hereinafter referred to as BDC) 8 , an inverter (hereinafter referred to as INV) 9 , and a step-up converter (hereinafter referred to as FDC) 20 . Among them, although in figure 1 Although not shown, the fuel cell system 1 includes an oxidant gas supply system and a fuel gas supply system that supply oxidant gas and fuel gas to the FC 10 , respectively. In addition, the vehicle includes a motor M for traveling, wheels W, an accelerator opening sensor 5 , and an ignition switch 6 .

[0026] FC10 generates electricity by receiving fuel gas and oxidant gas. In FC10, a plural...

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Abstract

A control device of a multi-phase converter having N converter circuits connected in parallel includes: a determination unit configured to determine each share ratio of the N converter circuits to unevenly share input current to the multi-phase converter among the N converter circuits such that a conversion efficiency indicating a ratio of output power from the multi-phase converter with respect to input power to the multi-phase converter is higher in the case where the input current is unevenly shared by the N converter circuits compared to the case where the input current is evenly shared by the N converter circuits when the number of driven converter circuits is one or more and N-1 or less and the start condition is satisfied; and a diagnosis unit configured to diagnose an abnormality of the N converter circuits when the N converter circuits are driven in accordance with the determined share ratios.

Description

technical field [0001] The invention relates to a control device and a power supply system of a multiphase converter. Background technique [0002] A multi-phase converter including a plurality of step-up converter circuits is known (for example, refer to Japanese Patent No. 6450884). In such a multiphase converter, the number of converter circuits to be driven is adjusted according to the magnitude of the input current, so that the converter circuits can be used within a range in which the conversion efficiency from input power to output power is good. [0003] For example, whether or not the converter circuit is abnormal can be diagnosed based on the current value flowing through the reactor of the converter circuit being driven. However, since other converter circuits are stopped while only one converter circuit is being driven, for example, it is not possible to diagnose whether other converter circuits are abnormal. Therefore, it is necessary to wait until all the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/10B60L50/70
CPCH02M3/10B60L50/70H02M3/1586H02M1/0048H02M1/32Y02T10/70Y02T90/40Y02E60/50B60L2210/10B60L3/0023B60L2240/529B60L50/75H02P2201/07Y02T10/64Y02T10/72H02M3/1584H02M3/285B60L58/40B60L50/51H02P27/06H01M2250/20B60L2210/14H01M8/0494H02M1/007H02M1/0009
Inventor 金子智彦伊藤雅之
Owner TOYOTA JIDOSHA KK