JPS57119672A - Controlling system of output current for frequency converter device - Google Patents
Controlling system of output current for frequency converter deviceInfo
- Publication number
- JPS57119672A JPS57119672A JP56003813A JP381381A JPS57119672A JP S57119672 A JPS57119672 A JP S57119672A JP 56003813 A JP56003813 A JP 56003813A JP 381381 A JP381381 A JP 381381A JP S57119672 A JPS57119672 A JP S57119672A
- Authority
- JP
- Japan
- Prior art keywords
- current
- power factor
- load
- command value
- polarity
- 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
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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/27—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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 for conversion of frequency
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Ac-Ac Conversion (AREA)
Abstract
PURPOSE:To reduce a variation in gain in a control system by a method wherein the power factor of a load is decreased by supplying a predetermined amount of reactive current from a power factor changing means in a region increasing the intermittent degree of an output current at low level. CONSTITUTION:A positive-polarity current and a negative-polarity current are supplied to a load L such as an AC machine from a thyristor bridge A and a thyristor bridge B respectively and the currents are controlled by a control circuit PC in accordance with the polarity of a command value i*. At that time, the torque current component value i2* of the motor L is supplied to a power factor changing signal generator 10 and a power factor changing signal DELTAi1* is generated to add a magnetizing current component command value i1* and a magnetizing current component command value (i1*)' is generated. Therefore, the power factor of the load is decreased at a low-load current region and the level of th command value is increased to reduce a variation in gain of a control system by eliminating a current intermittent phenomenon and stable control can be performed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56003813A JPS57119672A (en) | 1981-01-16 | 1981-01-16 | Controlling system of output current for frequency converter device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56003813A JPS57119672A (en) | 1981-01-16 | 1981-01-16 | Controlling system of output current for frequency converter device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57119672A true JPS57119672A (en) | 1982-07-26 |
JPS638709B2 JPS638709B2 (en) | 1988-02-24 |
Family
ID=11567623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56003813A Granted JPS57119672A (en) | 1981-01-16 | 1981-01-16 | Controlling system of output current for frequency converter device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57119672A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016019294A (en) * | 2014-07-04 | 2016-02-01 | 株式会社安川電機 | Matrix converter, power generation system, and power factor control method |
CN105763121A (en) * | 2016-03-03 | 2016-07-13 | 湖南大学 | Synchronous electric main shaft acceleration strong magnetic control method for variable-load superhigh-speed grinding |
-
1981
- 1981-01-16 JP JP56003813A patent/JPS57119672A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016019294A (en) * | 2014-07-04 | 2016-02-01 | 株式会社安川電機 | Matrix converter, power generation system, and power factor control method |
US9923456B2 (en) | 2014-07-04 | 2018-03-20 | Kabushiki Kaisha Yaskawa Denki | Matrix convertor, power generation system, and method for controlling power factor |
CN105763121A (en) * | 2016-03-03 | 2016-07-13 | 湖南大学 | Synchronous electric main shaft acceleration strong magnetic control method for variable-load superhigh-speed grinding |
CN105763121B (en) * | 2016-03-03 | 2018-05-01 | 湖南大学 | Synchronous electric spindle towards varying load superhigh speed grinding accelerates strong magnetic control method |
Also Published As
Publication number | Publication date |
---|---|
JPS638709B2 (en) | 1988-02-24 |
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