JPS55162891A - Brake circuit for ac motor - Google Patents
Brake circuit for ac motorInfo
- Publication number
- JPS55162891A JPS55162891A JP6991279A JP6991279A JPS55162891A JP S55162891 A JPS55162891 A JP S55162891A JP 6991279 A JP6991279 A JP 6991279A JP 6991279 A JP6991279 A JP 6991279A JP S55162891 A JPS55162891 A JP S55162891A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- motor
- relay
- capacitor
- level
- 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 perform sure braking, by detecting the polarity of an AC voltage and by applying the charged voltage of a capacitor to an AC motor at the end of half cycle of an AC voltage at the same polarity as the charged voltage of the capacitor.
CONSTITUTION: For braking, a relay switch S is opened, a thyristor SCR1 is turned off, a thyristor SCR3 is turned on and the charged voltage of a capacitor C0 is applied to the coil of an AC motor. A positive half wave of an AC voltage is produced by a half-wave rectifier circuit 1. A prescribed positive voltage is detected by a level comparator 2. The detection output of the comparator and a run/stop control signal C for the motor are applied through an AND gate circuit G and a relay drive circuit D to control a relay L. Even if the signal C has a high level, the relay L is opened in a next positive half cycle by the low-level output of the level comoarator 2.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6991279A JPS55162891A (en) | 1979-06-06 | 1979-06-06 | Brake circuit for ac motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6991279A JPS55162891A (en) | 1979-06-06 | 1979-06-06 | Brake circuit for ac motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55162891A true JPS55162891A (en) | 1980-12-18 |
Family
ID=13416373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6991279A Pending JPS55162891A (en) | 1979-06-06 | 1979-06-06 | Brake circuit for ac motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55162891A (en) |
-
1979
- 1979-06-06 JP JP6991279A patent/JPS55162891A/en active Pending
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