JPS5797371A - Inverter - Google Patents

Inverter

Info

Publication number
JPS5797371A
JPS5797371A JP55171022A JP17102280A JPS5797371A JP S5797371 A JPS5797371 A JP S5797371A JP 55171022 A JP55171022 A JP 55171022A JP 17102280 A JP17102280 A JP 17102280A JP S5797371 A JPS5797371 A JP S5797371A
Authority
JP
Japan
Prior art keywords
switch
power
voltage
opened
constant
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
JP55171022A
Other languages
Japanese (ja)
Inventor
Kenichi Hironaka
Kenji Nakamura
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55171022A priority Critical patent/JPS5797371A/en
Publication of JPS5797371A publication Critical patent/JPS5797371A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To protect a power transistor by cooperating a switch for maintaining the input voltage of a V/F converter constant at the time of interrupting a power switch with a power switch. CONSTITUTION:Since a switch 11 is opened simultaneously when a power switch 2 is opened, the charge stored in a capacitor 5 is maintained constant without discharge. Thus, the input power voltage of a V/F converter 7 is maintained at a constant value, and when the switches 2, 11 are again closed, the voltage of the same frequency as that when the switch 2 is opened is applied to a motor 10 irrespective of the value of a variable resistor 5. Accordingly, when the switch 2 is again closed, a voltage causing the damage of the power transistor 9 due to the faster speed than the stator speed of the motor 10 is not generated.
JP55171022A 1980-12-05 1980-12-05 Inverter Pending JPS5797371A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55171022A JPS5797371A (en) 1980-12-05 1980-12-05 Inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55171022A JPS5797371A (en) 1980-12-05 1980-12-05 Inverter

Publications (1)

Publication Number Publication Date
JPS5797371A true JPS5797371A (en) 1982-06-17

Family

ID=15915632

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55171022A Pending JPS5797371A (en) 1980-12-05 1980-12-05 Inverter

Country Status (1)

Country Link
JP (1) JPS5797371A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS614491A (en) * 1984-06-15 1986-01-10 Matsushita Electric Ind Co Ltd Induction motor drive device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS614491A (en) * 1984-06-15 1986-01-10 Matsushita Electric Ind Co Ltd Induction motor drive device

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