JPS6155437U - - Google Patents
Info
- Publication number
- JPS6155437U JPS6155437U JP13837784U JP13837784U JPS6155437U JP S6155437 U JPS6155437 U JP S6155437U JP 13837784 U JP13837784 U JP 13837784U JP 13837784 U JP13837784 U JP 13837784U JP S6155437 U JPS6155437 U JP S6155437U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- pulse signal
- inverter
- calculation circuit
- zero
- 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
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Protection Of Static Devices (AREA)
Description
図は本考案の実施例を示し、第１図はインバー
タの故障検出器のブロツク図、第２図は他の実施
例を示す同ブロツク図である。
１…インバータ、３…変圧器、４…ゼロクロス
検出器、５…１／２分周器、６…周波数算出回路
、７…比較器、８…基準値設定器、９…許容値設
定器。
The figures show an embodiment of the present invention; FIG. 1 is a block diagram of a fault detector for an inverter, and FIG. 2 is a block diagram of another embodiment. DESCRIPTION OF SYMBOLS 1...Inverter, 3...Transformer, 4...Zero cross detector, 5...1/2 frequency divider, 6...Frequency calculation circuit, 7...Comparator, 8...Reference value setter, 9...Tolerance value setter.
Claims (1)
ゼロ電位を検出し該ゼロ電位検出のタイミング毎
にパルス信号を出力するゼロクロス検出器と、該
ゼロクロス検出器から出力されるパルス信号を１
／２に分周する１／２分周器と、該１／２分周器
により分周された分周パルス信号を入力し該分周
パルス信号の周波数を算出する周波数算出回路と
、該周波数算出回路から送られる周波数データと
基準値設定器から送られる基準値とを比較しその
差が予め設定した許容値以上となつた時、故障検
出信号を出力する比較器とを備えたインバータの
故障検出器。 (2) 周波数算出回路は、分周器からの分周パル
ス信号の周期をカウントするカウンタと、該カウ
ンタによりカウントされた周期から周波数を演算
する演算器とを備えたことを特徴とする実用新案
登録請求の範囲第１項記載のインバータの故障検
出器。[Claims for Utility Model Registration] (1) A zero-cross detector that detects the zero potential of the AC voltage waveform output from the inverter and outputs a pulse signal at each timing of the zero-potential detection; 1 pulse signal
a 1/2 frequency divider that divides the frequency by 2; a frequency calculation circuit that receives the divided pulse signal divided by the 1/2 frequency divider and calculates the frequency of the divided pulse signal; Failure of an inverter equipped with a comparator that compares the frequency data sent from the calculation circuit with the reference value sent from the reference value setter and outputs a failure detection signal when the difference exceeds a preset tolerance value. Detector. (2) A utility model characterized in that the frequency calculation circuit includes a counter that counts the period of the frequency-divided pulse signal from the frequency divider, and an arithmetic unit that calculates the frequency from the period counted by the counter. An inverter failure detector according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13837784U JPS6155437U (en) | 1984-09-12 | 1984-09-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13837784U JPS6155437U (en) | 1984-09-12 | 1984-09-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6155437U true JPS6155437U (en) | 1986-04-14 |
Family
ID=30696769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13837784U Pending JPS6155437U (en) | 1984-09-12 | 1984-09-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6155437U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556262A (en) * | 1978-06-30 | 1980-01-17 | Toshiba Corp | Frequency detector |
-
1984
- 1984-09-12 JP JP13837784U patent/JPS6155437U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556262A (en) * | 1978-06-30 | 1980-01-17 | Toshiba Corp | Frequency detector |
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