JPS59189495U - current limit circuit - Google Patents
current limit circuitInfo
- Publication number
- JPS59189495U JPS59189495U JP1983083382U JP8338283U JPS59189495U JP S59189495 U JPS59189495 U JP S59189495U JP 1983083382 U JP1983083382 U JP 1983083382U JP 8338283 U JP8338283 U JP 8338283U JP S59189495 U JPS59189495 U JP S59189495U
- Authority
- JP
- Japan
- Prior art keywords
- current limit
- limit circuit
- current
- comparator
- signal
- 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
Landscapes
- Control Of Direct Current Motors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の電力制御装置の回路構成図、第２図は従
来の電力制御装置において負荷に流れる電流波形を示す
図、第３図はこの考案による電流リミット回路を応用し
た電力制御装置の回路構成図、第４図は第３図の装置に
おいて負荷に流れる電流波形を示す図である。
図中、１は三角波信号、２は電流指令信号、３はベース
、ドライブ信号用コンパレーター、４．′５、 ６．
７はコンパレーター３用の抵抗、８は電力増幅回路、９
はベース電流制限抵抗、１０はトランジスタ、１１は電
源、１２はモータ、１３はフライホイール用のダイオー
ド、１４は電流リミット回路、１５は電流検出抵抗、１
６は差動増幅器、１７．１８．１９．２０は差動増幅器
用の抵抗、２１は電流リミットレベル信号、２２は電流
、リミット信号用コンパレーター、２３． ２４
゜２５はコンパレーター２２用の抵抗、２６は極性 。
判別用のダイオード、２７はコンパレーター２２にヒス
テリシス特性をもたせるための抵抗である。
なお、図中同一あるいは相当部分には、同一符号を付し
て示しである。Fig. 1 is a circuit configuration diagram of a conventional power control device, Fig. 2 is a diagram showing the current waveform flowing to a load in a conventional power control device, and Fig. 3 is a diagram of a power control device to which the current limit circuit according to this invention is applied. The circuit configuration diagram, FIG. 4, is a diagram showing the current waveform flowing through the load in the device of FIG. 3. In the figure, 1 is a triangular wave signal, 2 is a current command signal, 3 is a base, a drive signal comparator, 4. '5, 6.
7 is a resistor for comparator 3, 8 is a power amplifier circuit, 9
is a base current limiting resistor, 10 is a transistor, 11 is a power supply, 12 is a motor, 13 is a flywheel diode, 14 is a current limit circuit, 15 is a current detection resistor, 1
6 is a differential amplifier, 17.18.19.20 is a resistor for the differential amplifier, 21 is a current limit level signal, 22 is a current limit signal comparator, 23. 24
゜25 is the resistor for the comparator 22, and 26 is the polarity. The discrimination diode 27 is a resistor for giving the comparator 22 a hysteresis characteristic. Note that the same or corresponding parts in the figures are indicated by the same reference numerals.
Claims (1)
力の電流信号と電流リミットレベル信号を比較し、トラ
ンジスタのＯＦＦ信号を出力するコンパレーターから成
るパルス幅制御方式の増幅装置の電流リミット回路にお
いて、上記コンパレーターにヒステリシス特性を持たせ
たことを特徴とする電流リミット回路。A current limit circuit of a pulse width control type amplifier device, which consists of a differential amplifier that detects the load current, and a comparator that compares the current signal output from the differential amplifier with a current limit level signal and outputs a transistor OFF signal. A current limit circuit characterized in that the above-mentioned comparator has a hysteresis characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983083382U JPS59189495U (en) | 1983-06-01 | 1983-06-01 | current limit circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983083382U JPS59189495U (en) | 1983-06-01 | 1983-06-01 | current limit circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59189495U true JPS59189495U (en) | 1984-12-15 |
Family
ID=30213341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983083382U Pending JPS59189495U (en) | 1983-06-01 | 1983-06-01 | current limit circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59189495U (en) |
-
1983
- 1983-06-01 JP JP1983083382U patent/JPS59189495U/en active Pending
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