JPS5619303A - Protective device for chopper of electric rolling stock - Google Patents

Protective device for chopper of electric rolling stock

Info

Publication number
JPS5619303A
JPS5619303A JP8232079A JP8232079A JPS5619303A JP S5619303 A JPS5619303 A JP S5619303A JP 8232079 A JP8232079 A JP 8232079A JP 8232079 A JP8232079 A JP 8232079A JP S5619303 A JPS5619303 A JP S5619303A
Authority
JP
Japan
Prior art keywords
chopper
voltage
output
filter capacitor
rolling stock
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.)
Granted
Application number
JP8232079A
Other languages
Japanese (ja)
Other versions
JPS6129202B2 (en
Inventor
Susumu Yomo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8232079A priority Critical patent/JPS5619303A/en
Publication of JPS5619303A publication Critical patent/JPS5619303A/en
Publication of JPS6129202B2 publication Critical patent/JPS6129202B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Stopping Of Electric Motors (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

PURPOSE: To prevent a failure of the commutation of a chopper generated due to the low electromotive force of a motor in a low speed range previously by a method wherein output from a voltage detector of a filter capacitor and a detector of motor currents is utilized.
CONSTITUTION: Ouput from a pattern circuit 22 and the voltage of a filter capacitor 5, output from a voltage detector 6, are compared by means of a comparison circuit 23. When the speed of an electric rolling stock drops and the voltage of the filter capacitor 5 becomes to a specified value or less, the comparator 22 functions, and sends out ON output. Thus, a solenoid valve 26 is turned OFF while the gate pulses of a chopper 10 are stopped, and a failure of commutation is prevented.
COPYRIGHT: (C)1981,JPO&Japio
JP8232079A 1979-06-26 1979-06-26 Protective device for chopper of electric rolling stock Granted JPS5619303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8232079A JPS5619303A (en) 1979-06-26 1979-06-26 Protective device for chopper of electric rolling stock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8232079A JPS5619303A (en) 1979-06-26 1979-06-26 Protective device for chopper of electric rolling stock

Publications (2)

Publication Number Publication Date
JPS5619303A true JPS5619303A (en) 1981-02-24
JPS6129202B2 JPS6129202B2 (en) 1986-07-05

Family

ID=13771266

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8232079A Granted JPS5619303A (en) 1979-06-26 1979-06-26 Protective device for chopper of electric rolling stock

Country Status (1)

Country Link
JP (1) JPS5619303A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61122148A (en) * 1984-11-19 1986-06-10 大阪セメント株式会社 Gypsum composition

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6321420A (en) * 1986-07-15 1988-01-29 Toshiba Corp Cooker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61122148A (en) * 1984-11-19 1986-06-10 大阪セメント株式会社 Gypsum composition
JPH0215509B2 (en) * 1984-11-19 1990-04-12 Osaka Cement

Also Published As

Publication number Publication date
JPS6129202B2 (en) 1986-07-05

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