JPS6426395A - Low noise control system for induction motor - Google Patents
Low noise control system for induction motorInfo
- Publication number
- JPS6426395A JPS6426395A JP62179060A JP17906087A JPS6426395A JP S6426395 A JPS6426395 A JP S6426395A JP 62179060 A JP62179060 A JP 62179060A JP 17906087 A JP17906087 A JP 17906087A JP S6426395 A JPS6426395 A JP S6426395A
- Authority
- JP
- Japan
- Prior art keywords
- low noise
- block
- switching frequency
- resonance
- variations
- 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 make a low noise operation to control the generation of an electromagnetic sound offensive to the ear due to resonance by operating an invertor with harmonic current frequency avoiding the mechanical resonance frequency of a structure. CONSTITUTION:The number of switchings per unit time is detected through the variations of control plugs ftau and fphi by a switching frequency detector 714. The variations of switching frequency is averaged by a block 715, and a mean valueSW of switching frequency is found. Accordingly, both an allowable error (a hysteresis value) phi of a hysteresis comparator of the magnetic flux of a block 711 and an allowable error (a hysteresis value) T of ternary hysteresis comparator of torque of a block 712 are controlled variably. Thus, a low noise operation can be done without producing any resonance state.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62179060A JPH0757119B2 (en) | 1987-07-20 | 1987-07-20 | Low noise control method for induction motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62179060A JPH0757119B2 (en) | 1987-07-20 | 1987-07-20 | Low noise control method for induction motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6426395A true JPS6426395A (en) | 1989-01-27 |
JPH0757119B2 JPH0757119B2 (en) | 1995-06-14 |
Family
ID=16059410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62179060A Expired - Fee Related JPH0757119B2 (en) | 1987-07-20 | 1987-07-20 | Low noise control method for induction motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0757119B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5188511B2 (en) * | 2008-01-18 | 2013-04-24 | 三菱電機株式会社 | Control device for power converter |
-
1987
- 1987-07-20 JP JP62179060A patent/JPH0757119B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5188511B2 (en) * | 2008-01-18 | 2013-04-24 | 三菱電機株式会社 | Control device for power converter |
US8537580B2 (en) | 2008-01-18 | 2013-09-17 | Mitsubishi Electric Corporation | Controller of power converter |
Also Published As
Publication number | Publication date |
---|---|
JPH0757119B2 (en) | 1995-06-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |