JPS5495347A - Appartus for preventing burning of motor field coil - Google Patents
Appartus for preventing burning of motor field coilInfo
- Publication number
- JPS5495347A JPS5495347A JP203178A JP203178A JPS5495347A JP S5495347 A JPS5495347 A JP S5495347A JP 203178 A JP203178 A JP 203178A JP 203178 A JP203178 A JP 203178A JP S5495347 A JPS5495347 A JP S5495347A
- Authority
- JP
- Japan
- Prior art keywords
- field
- current
- field coil
- coil
- relay
- 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 Generators And Motors (AREA)
Abstract
PURPOSE: To permit prevention of the field coil in case of occurrence of a trouble in a field control coil by using a field coil current detection relay, which is turned on when a field coil current exceeds a predetermined value and is turned off when the current becomes lower than the predetermined value, for disconnecting the power source.
CONSTITUTION: A motor field coil 2 of an elevator drive motor is connected to a thyristor converter 1, and a command field current and the actural field current are compared to control the thyristors 19 and 20. When obtaining a constant field current, a fault detection relay 27 is excited with the operation of a field current detection relay 21 and an instantaneous field loss detection relay 22, thus disconnecting a power source 16 with a switch 24a of a relay 24. Thus, in case when the field current is not reduced even with the operation of a relay 13a for controlling the field current to the REST current, it is detected to disconnect the power source 16 of the converter 1, so that burning of the motor field coil can be prevented by merely providing a simple circuit.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP203178A JPS5495347A (en) | 1978-01-13 | 1978-01-13 | Appartus for preventing burning of motor field coil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP203178A JPS5495347A (en) | 1978-01-13 | 1978-01-13 | Appartus for preventing burning of motor field coil |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5495347A true JPS5495347A (en) | 1979-07-27 |
Family
ID=11517954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP203178A Pending JPS5495347A (en) | 1978-01-13 | 1978-01-13 | Appartus for preventing burning of motor field coil |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5495347A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56156331U (en) * | 1980-04-21 | 1981-11-21 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52154059A (en) * | 1976-06-18 | 1977-12-21 | Hitachi Ltd | Protective device for dc motor |
-
1978
- 1978-01-13 JP JP203178A patent/JPS5495347A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52154059A (en) * | 1976-06-18 | 1977-12-21 | Hitachi Ltd | Protective device for dc motor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56156331U (en) * | 1980-04-21 | 1981-11-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5534854A (en) | Controlling method of secondary winding-exciting motor | |
JPS5495347A (en) | Appartus for preventing burning of motor field coil | |
JPS54144922A (en) | Control system for switching power | |
EP0001003A3 (en) | Apparatus and method for operating a dynamo-eletric machine | |
JPS54113038A (en) | Dc power supply circuit | |
JPS5614319A (en) | Nonelectric arc tap switching control unit | |
JPS5467655A (en) | Distribution line shortage protector | |
JPS55103073A (en) | Thyristor switch | |
JPS5674544A (en) | Controller of airconditioner | |
JPS5479442A (en) | Starting system of static type reactive power regulating device | |
JPS5574387A (en) | Generation-braking device for induction motor | |
JPS55109193A (en) | Stationary scherbius system controller | |
JPS54112495A (en) | Nuclear fussion device | |
JPS53145248A (en) | Control of elevator | |
JPS55111688A (en) | Controller for preventing overvoltage of thyristor motor | |
JPS54120107A (en) | Electric car control device | |
JPS568923A (en) | Gate circuit of gate turn-off thyristor | |
JPS5485315A (en) | Exciter for synchronous machine | |
JPS552326A (en) | Operation controller of motor | |
JPS5419125A (en) | Misoperation preventive circuit for power inverter | |
JPS5444713A (en) | Dc motor control system | |
JPS5320518A (en) | Controller of commutator-less motor | |
JPS5592583A (en) | Starting system by secondary resistance control of wound- rotor type motor | |
JPS5467796A (en) | Change detection circuit | |
JPS5483255A (en) | Safety device for elevator cage door opening and closing motor |