JPH0447301U - - Google Patents
Info
- Publication number
- JPH0447301U JPH0447301U JP8949390U JP8949390U JPH0447301U JP H0447301 U JPH0447301 U JP H0447301U JP 8949390 U JP8949390 U JP 8949390U JP 8949390 U JP8949390 U JP 8949390U JP H0447301 U JPH0447301 U JP H0447301U
- Authority
- JP
- Japan
- Prior art keywords
- output
- voltage
- comparator
- circuit
- pulse width
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000009499 grossing Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Description
第１図はこの考案による交流電気車の保護装置
の一実施例を示すブロツク図、第２図は従来の交
流電気車の保護装置を示すブロツク図である。
図において、１は主変圧器、３，４はパルス幅
変調方式コンバータ、５は平滑コンデンサ、６は
可変電圧可変周波数インバータ、７は誘導電動機
、９は比較器、１５は中間直流回路、１６は微分
回路、１７は定数回路、１８は加算回路である。
なお、図中、同一符号は同一、又は相当部分を示
す。
FIG. 1 is a block diagram showing an embodiment of a protection device for an AC electric vehicle according to this invention, and FIG. 2 is a block diagram showing a conventional protection device for an AC electric vehicle. In the figure, 1 is the main transformer, 3 and 4 are pulse width modulation converters, 5 is a smoothing capacitor, 6 is a variable voltage variable frequency inverter, 7 is an induction motor, 9 is a comparator, 15 is an intermediate DC circuit, and 16 is a 17 is a constant circuit, and 18 is an adder circuit.
In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
この主変圧器の２次巻線に接続され、出力直流電
圧を一定に制御するパルス幅変調方式コンバータ
と、このパルス幅変調方式コンバータの直流側に
接続された中間直流回路の平滑コンデンサと、こ
の平滑コンデンサを電圧源とする可変電圧可変周
波数インバータと、この可変電圧源可変周波数イ
ンバータの交流出力側に接続された誘導電動機と
を有する交流電気車において、 上記直流回路の電圧と、その時間変化率分を加
算する加算手段と、 この加算手段の出力と設定値を比較する比較器
と を備え、この比較器の出力により上記コンバータ
と上記インバータの動作を停止させるようにした
ことを特徴とする交流電気車の保護装置。[Scope of claim for utility model registration] A main transformer whose primary winding is connected to an AC overhead line,
A pulse width modulation converter is connected to the secondary winding of the main transformer and controls the output DC voltage to a constant level, and a smoothing capacitor in the intermediate DC circuit is connected to the DC side of the pulse width modulation converter. In an AC electric vehicle having a variable voltage variable frequency inverter using a smoothing capacitor as a voltage source and an induction motor connected to the AC output side of the variable voltage source variable frequency inverter, the voltage of the DC circuit and its time change rate are as follows: an alternating current, comprising: an adding means for adding up the amount; and a comparator for comparing the output of the adding means with a set value, and the operation of the converter and the inverter is stopped by the output of the comparator. Electric car protection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8949390U JPH0447301U (en) | 1990-08-29 | 1990-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8949390U JPH0447301U (en) | 1990-08-29 | 1990-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0447301U true JPH0447301U (en) | 1992-04-22 |
Family
ID=31823513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8949390U Pending JPH0447301U (en) | 1990-08-29 | 1990-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0447301U (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5047309A (en) * | 1973-09-03 | 1975-04-26 | ||
| JPS50103011A (en) * | 1974-01-23 | 1975-08-14 | ||
| JPS637102A (en) * | 1986-06-26 | 1988-01-13 | Toshiba Corp | Controller for electric rolling stock |
| JPS6352680A (en) * | 1986-08-19 | 1988-03-05 | Shinko Electric Co Ltd | Power source device for driving ac motor |
-
1990
- 1990-08-29 JP JP8949390U patent/JPH0447301U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5047309A (en) * | 1973-09-03 | 1975-04-26 | ||
| JPS50103011A (en) * | 1974-01-23 | 1975-08-14 | ||
| JPS637102A (en) * | 1986-06-26 | 1988-01-13 | Toshiba Corp | Controller for electric rolling stock |
| JPS6352680A (en) * | 1986-08-19 | 1988-03-05 | Shinko Electric Co Ltd | Power source device for driving ac motor |
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