JPS5484231A - Protecting method of inverter device - Google Patents

Protecting method of inverter device

Info

Publication number
JPS5484231A
JPS5484231A JP15208877A JP15208877A JPS5484231A JP S5484231 A JPS5484231 A JP S5484231A JP 15208877 A JP15208877 A JP 15208877A JP 15208877 A JP15208877 A JP 15208877A JP S5484231 A JPS5484231 A JP S5484231A
Authority
JP
Japan
Prior art keywords
thyristors
inverter device
time
set value
specified
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
Application number
JP15208877A
Other languages
Japanese (ja)
Inventor
Atsushi Kaga
Toshiharu Ito
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 JP15208877A priority Critical patent/JPS5484231A/en
Publication of JPS5484231A publication Critical patent/JPS5484231A/en
Pending legal-status Critical Current

Links

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  • Inverter Devices (AREA)

Abstract

PURPOSE: To intend to improve excess current detecting sensitivity of an inverter device at starting time, and improve protective capacity, by making the inverter device to start at a specified set value, and making set value to increase upto a specified value after elaspe of a constant value.
CONSTITUTION: When a starting switch 15 is made, Ic and Ip2 are input in a comparator 12, before a condenser 7 is charged in this state, thyristors 9, 10 are transmited, and when excess current is currented, detecting current Ic is increased, and a breaker 3 is opened at Ic>Ip2. Since breaking instruction is issued at smaller point of electric current by this operation, calorie which are generated at the thyristors 9, 10 can be remarkablly reduced. Next, elasping a specified time after starting, time delay relay 18 is operated, and set value is changed from Ip2 Ip1. From this, since detecting sensitivity of excess current at strating time, protection to failure of commutation of the thyristors can be rapidly done, before filter condenser is charged.
COPYRIGHT: (C)1979,JPO&Japio
JP15208877A 1977-12-16 1977-12-16 Protecting method of inverter device Pending JPS5484231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15208877A JPS5484231A (en) 1977-12-16 1977-12-16 Protecting method of inverter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15208877A JPS5484231A (en) 1977-12-16 1977-12-16 Protecting method of inverter device

Publications (1)

Publication Number Publication Date
JPS5484231A true JPS5484231A (en) 1979-07-05

Family

ID=15532776

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15208877A Pending JPS5484231A (en) 1977-12-16 1977-12-16 Protecting method of inverter device

Country Status (1)

Country Link
JP (1) JPS5484231A (en)

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