JPS5476922A - Method of controlling inverter driven induction motor - Google Patents
Method of controlling inverter driven induction motorInfo
- Publication number
- JPS5476922A JPS5476922A JP14452377A JP14452377A JPS5476922A JP S5476922 A JPS5476922 A JP S5476922A JP 14452377 A JP14452377 A JP 14452377A JP 14452377 A JP14452377 A JP 14452377A JP S5476922 A JPS5476922 A JP S5476922A
- Authority
- JP
- Japan
- Prior art keywords
- commutation
- current
- thyristor
- reactor
- instant
- 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.)
- Pending
Links
Abstract
PURPOSE: To reduce pulsations of torque by regenerating current in a smoothing reactor to power supply until the current value immediately before the commutation becomes equal to that immediately after the commutation and firing a thyristor for smoothing reactor current wheeling at an instant when the current value immediately before the commutation coincides with that immediatley after the commutation.
CONSTITUTION: At an instant t1 of start of commutation no gate signal is given to a thyristor S7 for smoothing reactor current wheeling, and energy in a smoothing reactor 4 is regenerated to the power source until the current command immediately after the commutation is coincided. Only at an instant t2 when the current in the smooting reactor 4 is reduced to coincide with the current command after the commutation, a gate signal is given to the reactor wheeling thyristor S7 to suddently reduce current in an induction motor 8 to zero, thys effecting commutation of thyristors S1 to S6 in the inverter 7. With this method sudden increase of current beyond the command value even when a new thyristor in the inverter to be fired is fired immediately after the commutation, so that it is possible to reduce harmonic torque pulsations at the time of the commutation.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14452377A JPS5476922A (en) | 1977-12-01 | 1977-12-01 | Method of controlling inverter driven induction motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14452377A JPS5476922A (en) | 1977-12-01 | 1977-12-01 | Method of controlling inverter driven induction motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5476922A true JPS5476922A (en) | 1979-06-20 |
Family
ID=15364308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14452377A Pending JPS5476922A (en) | 1977-12-01 | 1977-12-01 | Method of controlling inverter driven induction motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5476922A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59110392A (en) * | 1982-12-14 | 1984-06-26 | Toyo Electric Mfg Co Ltd | Speed control circuit for commutatorless motor |
-
1977
- 1977-12-01 JP JP14452377A patent/JPS5476922A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59110392A (en) * | 1982-12-14 | 1984-06-26 | Toyo Electric Mfg Co Ltd | Speed control circuit for commutatorless motor |
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