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Power converter and controller using such power converter for electric rolling stock

A power conversion device, electric vehicle control technology, applied in the direction of electric vehicles, battery/battery traction, electric vehicle charging technology, etc., to achieve the effect of reducing energy consumption

Active Publication Date: 2009-08-05
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]Recently, the development of secondary batteries and electric double-layer capacitors has progressed rapidly. Although the increase in energy storage has been achieved, in order to obtain sufficient energy for driving electric vehicles The energy of the current technology requires a relatively large and heavy power storage element

Method used

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  • Power converter and controller using such power converter for electric rolling stock
  • Power converter and controller using such power converter for electric rolling stock
  • Power converter and controller using such power converter for electric rolling stock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 2

[0080] Figure 4 It shows a configuration example of a control device for an electric vehicle in Embodiment 2 of the present invention.

[0081] Figure 4 The structure shown with figure 1 Compared with the structure of the first embodiment shown, one end of the connection of the switch S2 is changed from the positive side of the power storage element 14 to the connection point of the switching elements 16 and 17 . When the switch S2 is turned on, the power storage element 14 is connected in parallel to the capacitor 12 without passing through the switching elements 16 and 17 .

[0082] Since other parts have the same structure as that of Embodiment 1, the same reference numerals are assigned and descriptions thereof are omitted.

[0083] According to the configuration of the second embodiment, the power storage element 14 and the inverter 13 can be connected via the reactor 20 . Connecting the power storage element 14 and the inverter 13 via the reactor 20 prevents the puls...

Embodiment approach 3

[0089] Figure 5 It is a diagram showing a configuration example of a control device for an electric vehicle in Embodiment 3 of the present invention.

[0090] Figure 5 The structure shown with figure 1 Compared with the configuration of the first embodiment shown, the feature is that the switch S2 is deleted and the operation mode is added to the DCDC converter 15A. Since other parts have the same structure as that of Embodiment 1, the same reference numerals are assigned and descriptions thereof are omitted.

[0091] Such as Figure 5 As shown, Embodiment 3 is characterized in that switch S2 is not provided, and this function is replaced by switching element 16 of DCDC converter 15A.

[0092] That is to adopt the following structure, that is, in Embodiment 1 ( figure 2 , image 3 ) at the time when the switch S2 is turned on, the switching element 16 is fixed to be on (the switching element 17 is fixed to be off). By fixing the switching element 16 to conduction, th...

Embodiment approach 4

[0097] Figure 6 It is a diagram showing a configuration example of a control device for an electric vehicle in Embodiment 4 of the present invention.

[0098] Figure 6 The structure of Embodiment 4 shown is the same as figure 1 Compared with the structure of the first embodiment shown, the characteristic feature is that the DCDC converter 15A is changed to a DCDC converter 15B. Since other parts have the same structure as that of Embodiment 1, the same reference numerals are assigned and descriptions thereof are omitted.

[0099] Figure 6 Among them, the DCDC converter 15B is characterized in that it is composed of a so-called bidirectional buck-boost DCDC converter circuit including switching elements 16 to 19 that perform PWM operations; reactors 20 and 22; and a capacitor 21, and can perform power control in any direction. , not depending on the relationship between the voltage EB of the power storage element 14 and the inverter input voltage EFC.

[0100] Therefore...

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Abstract

Provided is a power converter having an inverter (13) wherein capacitors (12) are connected in parallel on a direct current side, and a power supply circuit configured to supply the inverter with a direct current from a power supply (1) and a power storage element (14). A controller using such power converter is also provided for electric rolling stocks. The power supply circuit is provided with a power supply switch (S1) arranged between the power supply and the inverter, a DCDC converter (15A) arranged between the power storage element and the inverter, and a bypass switch (S2) arranged between the power storage element and the inverter.

Description

technical field [0001] The present invention relates to a power conversion device that uses power received from a power source together with power from a power storage unit capable of storing DC power to supply power to a load with an inverter, and an electric vehicle control device using the power conversion device. Background technique [0002] In recent years, it is known that research and development of electric vehicle control devices using power storage elements composed of secondary batteries, electric double layer capacitors, etc. are being carried out. In addition, the stored electric power is used when the electric running is accelerated, so that the kinetic energy possessed by the vehicle can be effectively utilized. (For example, refer to Patent Document 1). [0003] Patent Document 1 discloses a case in which an electric vehicle is driven using electric power of a power storage element without receiving power supply from an overhead line. [0004] Patent Docum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
CPCB60L2200/26B60L9/22H02M3/1582B60L15/2045B60L2210/10B60L50/53Y02T10/64Y02T10/70Y02T10/7072Y02T10/72Y02T90/14B60Y2200/91B60L53/20
Inventor 北中英俊
Owner MITSUBISHI ELECTRIC CORP
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