JPS6481619A - Inverter device - Google Patents
Inverter deviceInfo
- Publication number
- JPS6481619A JPS6481619A JP23730187A JP23730187A JPS6481619A JP S6481619 A JPS6481619 A JP S6481619A JP 23730187 A JP23730187 A JP 23730187A JP 23730187 A JP23730187 A JP 23730187A JP S6481619 A JPS6481619 A JP S6481619A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- motor
- predetermined level
- inverter
- integrator
- 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
- Protection Of Static Devices (AREA)
- Stopping Of Electric Motors (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
PURPOSE:To achieve reliable overcurrent protection during low speed operation, by switching integration time constants for detecting overcurrent when speed of an AC motor is lower than a predetermined level and stopping an inverter when the output from an integrating means reaches to a predetermined level. CONSTITUTION:When output frequency of an inverter 1 is controlled to control speed of an AC motor 3, current level of the AC motor 3 is detected through a current detector 8 then fed to an integrator 9 and integrated. At this time, speed of the AC motor 3 is detected through a speed detector 5 and fed to a level detector 6 so as to switch integration time constants of the integrator 9 when the speed is lower than a predetermined level. Output from the integrator 9 is compared with a predetermined level in a comparator 10, and if the former is higher, the inverter 1 is disabled. Consequently, overcurrent can be interrupted in short time during low speed operation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23730187A JPS6481619A (en) | 1987-09-24 | 1987-09-24 | Inverter device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23730187A JPS6481619A (en) | 1987-09-24 | 1987-09-24 | Inverter device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6481619A true JPS6481619A (en) | 1989-03-27 |
Family
ID=17013335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23730187A Pending JPS6481619A (en) | 1987-09-24 | 1987-09-24 | Inverter device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6481619A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007215349A (en) * | 2006-02-10 | 2007-08-23 | Nsk Ltd | Alarm signal output unit and load protector, and method for outputting alarm signal |
JP2009011156A (en) * | 2003-07-02 | 2009-01-15 | Toyota Motor Corp | Output managing device and electric vehicle with the same |
-
1987
- 1987-09-24 JP JP23730187A patent/JPS6481619A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009011156A (en) * | 2003-07-02 | 2009-01-15 | Toyota Motor Corp | Output managing device and electric vehicle with the same |
JP2007215349A (en) * | 2006-02-10 | 2007-08-23 | Nsk Ltd | Alarm signal output unit and load protector, and method for outputting alarm signal |
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