JPS5526039A - Exciting current controller for electromagnetic attraction mechanism - Google Patents
Exciting current controller for electromagnetic attraction mechanismInfo
- Publication number
- JPS5526039A JPS5526039A JP9838878A JP9838878A JPS5526039A JP S5526039 A JPS5526039 A JP S5526039A JP 9838878 A JP9838878 A JP 9838878A JP 9838878 A JP9838878 A JP 9838878A JP S5526039 A JPS5526039 A JP S5526039A
- Authority
- JP
- Japan
- Prior art keywords
- turn
- timer
- exciting coil
- circuit
- signal
- 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
- Stopping Of Electric Motors (AREA)
Abstract
PURPOSE: To reduce power loss, by providing a semiconductor switch which opens or closes a connection circuit between a power source and the exciting coil of an electromagnetic attraction mechanism and by controlling the turn-on of the semiconductor switch so that the current of the exciting coil is set smaller in attraction than after that.
CONSTITUTION: An electromagnetic brake BR for a motor M is controlled by an excitation controller FC, which comprises a timer circuit TC and a turn-on pulse generation circuit PG and regulates the current of the exciting coil F by controlling the turn-on of a thyristor CR. The timer circuit TC comprises a PUT P1, capacitors C1, C2, a diode D1, resistors R1∼R10 and a transistor Q. When no electricity is supplied from an AC power source Vac, the timer circuit does not act. A timer signal is opened for a time prescribed by the time constant of the capacitor C2 after the starting of energization but is short-circuited after the prescribed time. The turn-on signal for the thyristor is regulated depending on the timer signal.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9838878A JPS5526039A (en) | 1978-08-11 | 1978-08-11 | Exciting current controller for electromagnetic attraction mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9838878A JPS5526039A (en) | 1978-08-11 | 1978-08-11 | Exciting current controller for electromagnetic attraction mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5526039A true JPS5526039A (en) | 1980-02-25 |
Family
ID=14218463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9838878A Pending JPS5526039A (en) | 1978-08-11 | 1978-08-11 | Exciting current controller for electromagnetic attraction mechanism |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5526039A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6139875A (en) * | 1984-07-30 | 1986-02-26 | Shin Kobe Electric Mach Co Ltd | Electromagnetic brake drive circuit |
JPH01151096U (en) * | 1988-04-12 | 1989-10-18 |
-
1978
- 1978-08-11 JP JP9838878A patent/JPS5526039A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6139875A (en) * | 1984-07-30 | 1986-02-26 | Shin Kobe Electric Mach Co Ltd | Electromagnetic brake drive circuit |
JPH01151096U (en) * | 1988-04-12 | 1989-10-18 |
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