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Electric vehicle driving device

A driving device and electric car technology, applied in the direction of electric vehicles, electric braking systems, output power conversion devices, etc., to achieve the effect of stable communication

Inactive Publication Date: 2012-12-19
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lines 100 etc. represent these limit values

Method used

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Examples

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Embodiment 1

[0031] figure 1 It is a block diagram showing a schematic configuration of a first embodiment of the electric vehicle driving device of the present invention.

[0032] First, the main circuit 25 will be described. The DC power supply 1 is a direct current tram line (overhead), or an on-board engine generator+rectifier, or an AC tram line (overhead)+converter. The DC power source 1 is connected to a plurality of dynamic brakes 19 , a smoothing capacitor 5 and an inverter 6 through a first switch 2 . A motor 7 serving as a power source for driving the electric car is connected to the inverter 6 .

[0033] To both ends of the smoothing capacitor 5 , for example, N dynamic braking circuits 19 are connected in parallel. The generating brake circuit 19 is constituted as a series circuit of a brake chopper switch circuit 3 and a resistor 4 (hereinafter referred to as a brake resistor), wherein the brake chopper switch circuit 3 is used for controlling regenerative power, and the ...

Embodiment 2

[0047] Figure 5 It is a block diagram showing a schematic configuration of a second embodiment of the electric vehicle driving device of the present invention. The structure of the main circuit 25 is the same as that of the first embodiment. In the second embodiment, carrier triangle waves of different frequencies are supplied to the respective brake chopper switch circuits 3 of the switch control unit 26 .

[0048] The frequency calculation unit 11 provided in the switch control unit 26 receives the number N of brake chopper switch circuits 3 and calculates the frequency of the carrier triangular wave of each brake chopper switch circuit 3 . For example, the frequency fBCH of the carrier triangular wave is determined as in the following equation (2).

[0049] fBCHn=fO+(n-1)×Δf...(2)

[0050] Here, n represents the nth brake chopper switch circuit 3 (n=1 to N). N is the number of parallel brake chopper switch circuits 3 . Therefore, all the triangular carrier wave freque...

Embodiment 3

[0063] Image 6 It is a block diagram showing a schematic configuration of a third embodiment of the electric vehicle driving device of the present invention.

[0064] As usual, one dynamic braking circuit 19 is provided for one inverter circuit in the main circuit 25 . The switch control unit 26 includes a frequency calculation unit 12 , a carrier triangle wave generator 9 , a phase estimation unit 27 , and a comparator 10 . The phase estimation unit 27 receives the carrier triangular wave frequency fBCH from the frequency calculation unit 12, and calculates the phase θ (0° to 360°) of the triangular wave according to the following equation (4).

[0065] [mathematical formula 2]

[0066] θ=∫(2×π×fBCH)dt…(4)

[0067] The frequency calculating unit 12 calculates the carrier frequency fBCH based on the phase θ input from the phase estimating unit 27 . The carrier triangular wave generator 9 generates the carrier triangular wave of the brake chopper switching circuit 3 accord...

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Abstract

There is provided an electric-vehicle driving apparatus which consumes regenerative energy by a brake resistor and can decrease harmonic components generated by a brake-chopper switching circuit. Plural brake-chopper switching circuits 3 are provided in parallel for each inverter 6. Harmonic components generated by the brake-chopper switching circuits 3 are decreased by changing phases or frequencies of triangular carrier waves of the switching circuits 3, relatively to each other.

Description

Technical field [0001] The present invention involves the use of brake resistance to consumes the remaining energy driving device generated in the regenerative braking action. Background technique [0002] In the driver -oriented tram -oriented tram, the renewable energy produced by using a brake resistance to consumes a brake during braking is called the working mode of power generation braking.In this mode, the input rate calculated based on the DC voltage input side of the DC voltage input side of the DC voltage of the drive motor will be compared with the brake chopped corridor carrier triangle wave.According to this comparison result, the door signal of the chopper switch circuit is generated to control the in -line state of the switch component. [0003] This high -frequency wave component generated during the operating circuit of a brake chopper switch is sometimes bringing induction interference to the feed system.Among the similar public technologies related to reducing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/16B60L7/22B60L9/16H02M7/797B60L50/13
CPCB60L9/16B60L2200/26B60L7/16H02M7/797B60L7/22B60L7/06B60L2270/147B60L50/13Y02T10/7072Y02T10/70
Inventor 林敏松冈学宫崎玲结城和明
Owner KK TOSHIBA
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