RO83507B1 - Frequency static converter - Google Patents
Frequency static converterInfo
- Publication number
- RO83507B1 RO83507B1 RO106381A RO10638182A RO83507B1 RO 83507 B1 RO83507 B1 RO 83507B1 RO 106381 A RO106381 A RO 106381A RO 10638182 A RO10638182 A RO 10638182A RO 83507 B1 RO83507 B1 RO 83507B1
- Authority
- RO
- Romania
- Prior art keywords
- inverter
- reduced
- low
- rectifier
- static converter
- Prior art date
Links
- 230000003068 static effect Effects 0.000 title abstract 2
- 239000003990 capacitor Substances 0.000 abstract 2
- 238000009499 grossing Methods 0.000 abstract 1
- 238000001228 spectrum Methods 0.000 abstract 1
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
Invensia se refera la un convertizor static cu amplitudinea si frecventa tensiunii de iesire reglabile si cu un continut redus de armonici pe întreaga gama de reglaj a frecventei. Convertizorul utilizeaza variatia în trepte a amplitudinii tensiunii intermediare, obtinuta cu un redresor cu numar variabil de pulsuri care se alimenteaza la tensiunile de linie si de faza ale retelei trifazate. Reglajul tensiunii, se face în trepte cu redresorul si continuu în cadrul fiecarei trepte cu invertorul, obtinînd în acest fel un spectru redus de armonici pe întreaga gama de reglaj performantele fiind îmbunatatite în special la frecvente joase. Ca urmare valoarea condensatorului filtrului de netezire din circuitul intermediar este redusa consumul de energie reactiva este micsorat iar pierderile în motorul asincron alimentat sunt diminuate în special la turatii mici. Energia înmagazinata în inductantele de faza aleinvertorului, este recuperata cu ajutorul unor circuite soeciale astfel introduse în schema încat mpresc si viteza de inversare a polaritasii condensatoarelor din circuitele de stingere ale invertorului.Invention refers to a static converter with amplitude and frequency of adjustable output voltage and a low harmonic content over the entire frequency range. The inverter uses the incremental variation in the intermediate voltage amplitude obtained with a variable pulse rectifier that feeds to the line voltages and phases of the three-phase network. The voltage adjustment is made step by step with the rectifier and continuously at each step with the inverter, thus obtaining a low harmonic spectrum over the entire range, the performance being improved especially at low frequencies. As a result, the value of the intermediate circuit smoothing capacitor is reduced, the reactive power consumption is reduced and the losses in the asynchronous motor are reduced especially at low revolutions. The energy stored in the phase inductors of the inverter is recovered by means of so-called circuits so introduced into the scheme and the inverting speed of capacitor polarity in the inverter's extinguishing circuits.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO82106382A RO84363A2 (en) | 1982-01-21 | 1982-01-21 | DICLORACETAMIDE DERIVED AND PROCEDURE FOR PREPARING THEM |
| RO106381A RO83507B1 (en) | 1982-01-21 | 1982-01-21 | Frequency static converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO106381A RO83507B1 (en) | 1982-01-21 | 1982-01-21 | Frequency static converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RO83507A2 RO83507A2 (en) | 1984-03-15 |
| RO83507B1 true RO83507B1 (en) | 1984-03-30 |
Family
ID=20110987
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO106381A RO83507B1 (en) | 1982-01-21 | 1982-01-21 | Frequency static converter |
| RO82106382A RO84363A2 (en) | 1982-01-21 | 1982-01-21 | DICLORACETAMIDE DERIVED AND PROCEDURE FOR PREPARING THEM |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO82106382A RO84363A2 (en) | 1982-01-21 | 1982-01-21 | DICLORACETAMIDE DERIVED AND PROCEDURE FOR PREPARING THEM |
Country Status (1)
| Country | Link |
|---|---|
| RO (2) | RO83507B1 (en) |
-
1982
- 1982-01-21 RO RO106381A patent/RO83507B1/en unknown
- 1982-01-21 RO RO82106382A patent/RO84363A2/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| RO84363A2 (en) | 1984-06-21 |
| RO83507A2 (en) | 1984-03-15 |
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