JPS57132772A - Pulse switching controlling method for pulse width modulation type inverter - Google Patents

Pulse switching controlling method for pulse width modulation type inverter

Info

Publication number
JPS57132772A
JPS57132772A JP56016719A JP1671981A JPS57132772A JP S57132772 A JPS57132772 A JP S57132772A JP 56016719 A JP56016719 A JP 56016719A JP 1671981 A JP1671981 A JP 1671981A JP S57132772 A JPS57132772 A JP S57132772A
Authority
JP
Japan
Prior art keywords
pulse
reducing
fundamental wave
phase
width modulation
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
JP56016719A
Other languages
Japanese (ja)
Other versions
JPS6115673B2 (en
Inventor
Hidetoshi Aizawa
Kaoru Tamura
Yutaka Suzuki
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 JP56016719A priority Critical patent/JPS57132772A/en
Publication of JPS57132772A publication Critical patent/JPS57132772A/en
Publication of JPS6115673B2 publication Critical patent/JPS6115673B2/ja
Granted 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
    • H02M7/505—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 thyratron or thyristor type requiring extinguishing means
    • H02M7/515—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/525—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform or frequency
    • H02M7/527—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform or frequency by pulse width modulation

Abstract

PURPOSE:To enable the smooth torque control of an induction motor by reducing the variation in the fundamental wave voltage and the displacement in the phase at the switching time when a PWM inverter is switched between 3-pulse and 1-pulse modes. CONSTITUTION:A source oscillation frequency f0 is counted by a counter 10, is stored in ROMs 11-13, is compared with a DC voltage VC by D/A converters 14-16, and modulation pulse is formed under the exclusive OR conditions 20-22 with the respective phase fundamental wave pulses. The resetting circuit 23 of the counter 10 is switched at the time of switching between 3-pulse and 1-pulse modes, thereby reducing the variation in the effective value of the fundamental wave voltage, and the displacement of the phase can be reduced by the signal from a lead 1-pulse clock generator. Accordingly, the current jump at the switching time can be reduced, thereby reducing the conversion capacity of the inverter and controlling the smooth torque of a motor.
JP56016719A 1981-02-05 1981-02-05 Pulse switching controlling method for pulse width modulation type inverter Granted JPS57132772A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56016719A JPS57132772A (en) 1981-02-05 1981-02-05 Pulse switching controlling method for pulse width modulation type inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56016719A JPS57132772A (en) 1981-02-05 1981-02-05 Pulse switching controlling method for pulse width modulation type inverter

Publications (2)

Publication Number Publication Date
JPS57132772A true JPS57132772A (en) 1982-08-17
JPS6115673B2 JPS6115673B2 (en) 1986-04-25

Family

ID=11924067

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56016719A Granted JPS57132772A (en) 1981-02-05 1981-02-05 Pulse switching controlling method for pulse width modulation type inverter

Country Status (1)

Country Link
JP (1) JPS57132772A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60190168A (en) * 1984-03-08 1985-09-27 Meidensha Electric Mfg Co Ltd Pulse number switching system of pwm inverter
JPS62163589A (en) * 1986-01-13 1987-07-20 Hitachi Ltd Controller for induction motor with pulse width modulation inverter
US4924168A (en) * 1987-06-01 1990-05-08 Hitachi, Ltd. Control apparatus for PWM-controlled, variable voltage/variable frequency inverters
WO2012127236A3 (en) * 2011-03-22 2013-06-13 Technelec Ltd A control system for an inverter and a method of controlling an inverter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60190168A (en) * 1984-03-08 1985-09-27 Meidensha Electric Mfg Co Ltd Pulse number switching system of pwm inverter
JPS62163589A (en) * 1986-01-13 1987-07-20 Hitachi Ltd Controller for induction motor with pulse width modulation inverter
JPH0564036B2 (en) * 1986-01-13 1993-09-13 Hitachi Ltd
US4924168A (en) * 1987-06-01 1990-05-08 Hitachi, Ltd. Control apparatus for PWM-controlled, variable voltage/variable frequency inverters
WO2012127236A3 (en) * 2011-03-22 2013-06-13 Technelec Ltd A control system for an inverter and a method of controlling an inverter

Also Published As

Publication number Publication date
JPS6115673B2 (en) 1986-04-25

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