JPS6251989U - - Google Patents
Info
- Publication number
- JPS6251989U JPS6251989U JP14201885U JP14201885U JPS6251989U JP S6251989 U JPS6251989 U JP S6251989U JP 14201885 U JP14201885 U JP 14201885U JP 14201885 U JP14201885 U JP 14201885U JP S6251989 U JPS6251989 U JP S6251989U
- Authority
- JP
- Japan
- Prior art keywords
- motor
- thermal characteristic
- overload
- inverter device
- characteristic data
- 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
- 238000010586 diagram Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
Landscapes
- Protection Of Generators And Motors (AREA)
- Stopping Of Electric Motors (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は本考案の運転方法を示すフローチヤート、第
３図は本考案における電動機のサーマル特性図、
第４図は従来のインバータ装置の一例を示す回路
図である。
１…変流器、２…インバータ、３…交流電動機
、４…周波数設定器、５…加減速制限回路、６…
制御部、９…サーマル特性入力部、１０…記憶部
、１１…ｄｆ／ｄｔ制御回路、１２…自動選定回
路、１３…カウンタ回路。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a flowchart showing the operating method of the present invention, and Figure 3 is a thermal characteristic diagram of the electric motor in the present invention.
FIG. 4 is a circuit diagram showing an example of a conventional inverter device. 1... Current transformer, 2... Inverter, 3... AC motor, 4... Frequency setter, 5... Acceleration/deceleration limiting circuit, 6...
Control unit, 9... Thermal characteristic input unit, 10... Storage unit, 11... df/dt control circuit, 12... Automatic selection circuit, 13... Counter circuit.
Claims (1)
数のインバータ装置において、複数の運転周波数
に対応する電動機のサーマル特性データを記憶す
る記憶部と、上記サーマル特性データから実際の
運転周波数に対するサーマル特性を選定する自動
選定回路と、上記選定されたサーマル特性に基づ
いて交流電動機の過負荷を判別する制御部と、電
動機の過負荷時間をカウントし過負荷時間が所定
値を超えたときインバータを停止させるカウンタ
回路を備えたことを特徴とするインバータ装置。 In a variable voltage variable frequency inverter device that drives an AC motor at variable speed, the storage unit stores thermal characteristic data of the motor corresponding to a plurality of operating frequencies, and the thermal characteristic for the actual operating frequency is selected from the thermal characteristic data. An automatic selection circuit, a control unit that determines overload of the AC motor based on the selected thermal characteristics, and a counter circuit that counts the overload time of the motor and stops the inverter when the overload time exceeds a predetermined value. An inverter device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14201885U JPS6251989U (en) | 1985-09-19 | 1985-09-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14201885U JPS6251989U (en) | 1985-09-19 | 1985-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6251989U true JPS6251989U (en) | 1987-03-31 |
Family
ID=31050346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14201885U Pending JPS6251989U (en) | 1985-09-19 | 1985-09-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6251989U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6066622A (en) * | 1983-09-19 | 1985-04-16 | 三菱電機株式会社 | Overcurrent protecting device |
-
1985
- 1985-09-19 JP JP14201885U patent/JPS6251989U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6066622A (en) * | 1983-09-19 | 1985-04-16 | 三菱電機株式会社 | Overcurrent protecting device |
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