JPS6475377A - Controller for ac elevator - Google Patents
Controller for ac elevatorInfo
- Publication number
- JPS6475377A JPS6475377A JP62233316A JP23331687A JPS6475377A JP S6475377 A JPS6475377 A JP S6475377A JP 62233316 A JP62233316 A JP 62233316A JP 23331687 A JP23331687 A JP 23331687A JP S6475377 A JPS6475377 A JP S6475377A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- voltage
- low
- during
- transistors
- 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
Abstract
PURPOSE: To safely operate the transistors of an inverter even if a large current is made to flow therein by connecting a low-voltage AC power supply to the input side or output side of a converter during an emergency stop operation test, and lowering the output voltage of a main circuit. CONSTITUTION: During an emergency stop operation test, contactor contacts 71 -73 are opened to stop the supply of electricity from a three-phase ac power supply 6, and a battery 14 is connected to the input side of a converter 8 to lower a DC voltage applied to an inverter 9. Since an elevator can be operated at low speed during the test, a low voltage alternating current of low frequency may be applied to an electric motor 10, but since torque greater than the normal one is needed, a primary current limiter circuit 55 and a torque limiter circuit 52 have their respective limiter values set to be greater than those under normal conditions. Thus, the transistors of the inverter can operate within a safe operating range even if a large current is made to flow therein, and the capacity of each transistor can be reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62233316A JPS6475377A (en) | 1987-09-17 | 1987-09-17 | Controller for ac elevator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62233316A JPS6475377A (en) | 1987-09-17 | 1987-09-17 | Controller for ac elevator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6475377A true JPS6475377A (en) | 1989-03-22 |
Family
ID=16953219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62233316A Pending JPS6475377A (en) | 1987-09-17 | 1987-09-17 | Controller for ac elevator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6475377A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006335553A (en) * | 2005-06-06 | 2006-12-14 | Yaskawa Electric Corp | Elevator control device and its control method |
CN107792739A (en) * | 2016-08-29 | 2018-03-13 | 通力股份公司 | Elevator |
-
1987
- 1987-09-17 JP JP62233316A patent/JPS6475377A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006335553A (en) * | 2005-06-06 | 2006-12-14 | Yaskawa Electric Corp | Elevator control device and its control method |
CN107792739A (en) * | 2016-08-29 | 2018-03-13 | 通力股份公司 | Elevator |
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