JPS55111671A - Commutation angle controller - Google Patents
Commutation angle controllerInfo
- Publication number
- JPS55111671A JPS55111671A JP1872879A JP1872879A JPS55111671A JP S55111671 A JPS55111671 A JP S55111671A JP 1872879 A JP1872879 A JP 1872879A JP 1872879 A JP1872879 A JP 1872879A JP S55111671 A JPS55111671 A JP S55111671A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- commutation
- phase
- leading
- angle
- 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
Landscapes
- Control Of Ac Motors In General (AREA)
- Inverter Devices (AREA)
Abstract
PURPOSE: To prevent the failure of commutation when a power supply voltage is lowered by a commutation angle controller by picking up a phase leading voltage from the differential voltage between the phase of the current and the phase of the current to be commutated next, comparing the phase leading voltage with predetermined level voltage of a setting unit and thus limiting the commutation leading angle.
CONSTITUTION: A β limiting level detector circuit in a phase shifter 13 for controlling the phase of the thyristor bridge 6 of an external commutated inverter leads a voltage a' through a circuit having resistors 32, 33 and a capacitor 31 to a voltage having leading phase and applies it to a level detector 25 together with positive voltage from a control resistor 34. A detector 25 detects zero point, and supplies to an OR gate 26 to limit the commutation leading angle by an AND gate 27. Even if the power voltage is therefore varied, this controller can control the commutation angle so that the commutation voltage product may substantially become constant. Accordingly, it can prevent the failure of the commutation and utilize the inverter voltage to its maximum level.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54018728A JPS5922473B2 (en) | 1979-02-20 | 1979-02-20 | Commutation angle control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54018728A JPS5922473B2 (en) | 1979-02-20 | 1979-02-20 | Commutation angle control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55111671A true JPS55111671A (en) | 1980-08-28 |
| JPS5922473B2 JPS5922473B2 (en) | 1984-05-26 |
Family
ID=11979721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54018728A Expired JPS5922473B2 (en) | 1979-02-20 | 1979-02-20 | Commutation angle control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5922473B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4751934A (en) * | 1986-06-17 | 1988-06-21 | Alford Industries, Inc. | Cosmetic sampler |
-
1979
- 1979-02-20 JP JP54018728A patent/JPS5922473B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5922473B2 (en) | 1984-05-26 |
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