UA101259C2 - Ac electric motor starter - Google Patents
Ac electric motor starterInfo
- Publication number
- UA101259C2 UA101259C2 UAA201112704A UAA201112704A UA101259C2 UA 101259 C2 UA101259 C2 UA 101259C2 UA A201112704 A UAA201112704 A UA A201112704A UA A201112704 A UAA201112704 A UA A201112704A UA 101259 C2 UA101259 C2 UA 101259C2
- Authority
- UA
- Ukraine
- Prior art keywords
- current
- motor
- stator
- decrease
- provides
- Prior art date
Links
Landscapes
- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention relates to electric engineering and can be used to extend life time of AC motors due to limitation of current and mechanical loads at start. An AC motor starting device comprises bidirectional switching devices having control circuits which form a regulator of AC supplied to a motor stator. The regulator uses length modulation with a frequency which exceeds the network frequency. This provides to decrease harmonics level in the motor current. In a reduced-current start device individual phase control of stator voltages of motor is used; three regulators changing phase voltage are used. Regardless of quantity of power switches, the invention provides for use switches having lesser breakdown voltage. The use of the propose device allows decreasing start current with start moment saving, i.e. to improve an index of mechanical moment/stator current (N m / A), and decrease negative effect of the motor start device on the power supply network. Both effects substantial decrease of harmonic distortions and asymmetry of start currents at start.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
UAA201112704A UA101259C2 (en) | 2011-10-31 | 2011-10-31 | Ac electric motor starter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
UAA201112704A UA101259C2 (en) | 2011-10-31 | 2011-10-31 | Ac electric motor starter |
Publications (1)
Publication Number | Publication Date |
---|---|
UA101259C2 true UA101259C2 (en) | 2013-03-11 |
Family
ID=51585773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
UAA201112704A UA101259C2 (en) | 2011-10-31 | 2011-10-31 | Ac electric motor starter |
Country Status (1)
Country | Link |
---|---|
UA (1) | UA101259C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109428524A (en) * | 2018-09-28 | 2019-03-05 | 佛山市顺德区和而泰电子科技有限公司 | Permanent magnet synchronous motor closed loop switching method |
-
2011
- 2011-10-31 UA UAA201112704A patent/UA101259C2/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109428524A (en) * | 2018-09-28 | 2019-03-05 | 佛山市顺德区和而泰电子科技有限公司 | Permanent magnet synchronous motor closed loop switching method |
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