JPS5752302A - Method and apparatus for detecting plugging of electric rolling stock - Google Patents
Method and apparatus for detecting plugging of electric rolling stockInfo
- Publication number
- JPS5752302A JPS5752302A JP12634080A JP12634080A JPS5752302A JP S5752302 A JPS5752302 A JP S5752302A JP 12634080 A JP12634080 A JP 12634080A JP 12634080 A JP12634080 A JP 12634080A JP S5752302 A JPS5752302 A JP S5752302A
- Authority
- JP
- Japan
- Prior art keywords
- plugging
- currents
- constantly
- transistor
- diode
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/003—Dynamic electric braking by short circuiting the motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
PURPOSE: To detect a braking condition through plugging accurately by determining reference voltage from a current detecting means by currents flowing under a locking condition of a motor during the operating time of a monostable multivibrator.
CONSTITUTION: When a switch not shown is changed over, electromagnetic contactors 5, 6 are each switched to the constantly-closed contact b side and the constantly-opened contact c side, and brought to plugging conditions, and currents by electromotive force flow through armature winding 3 through a plugging diode 7. In this case, the output of a comparator 20 is [1] because the charging voltage of a soft start capacitor 18 is small - that is, a conduction ratio is smaller than set value - due to the functioning of a clear circuit, etc. not shown responding to the action of a changeover switch owing to just after changing over. Since the magnitude of source currents during the operating period of the monostable mutivibrator 16 becomes larger than reference value on account of the short circuit of the armature winding 3 by the diode 7 at the same time, the output of comparators 13, 49 is both [1], base currents are supplied to a transistor 51 and the transistor 51 is at on, and plugging can be detected.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12634080A JPS5752302A (en) | 1980-09-11 | 1980-09-11 | Method and apparatus for detecting plugging of electric rolling stock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12634080A JPS5752302A (en) | 1980-09-11 | 1980-09-11 | Method and apparatus for detecting plugging of electric rolling stock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5752302A true JPS5752302A (en) | 1982-03-27 |
Family
ID=14932742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12634080A Pending JPS5752302A (en) | 1980-09-11 | 1980-09-11 | Method and apparatus for detecting plugging of electric rolling stock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5752302A (en) |
-
1980
- 1980-09-11 JP JP12634080A patent/JPS5752302A/en active Pending
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