JPS5678390A - Multispeed controlling device of induction motor - Google Patents
Multispeed controlling device of induction motorInfo
- Publication number
- JPS5678390A JPS5678390A JP15247079A JP15247079A JPS5678390A JP S5678390 A JPS5678390 A JP S5678390A JP 15247079 A JP15247079 A JP 15247079A JP 15247079 A JP15247079 A JP 15247079A JP S5678390 A JPS5678390 A JP S5678390A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- switch
- supply
- induction motor
- transformer
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE:To obtain a variable speed operating system with a less loss and a superior characteristic by a method wherein a bi-lateral control rectifier arranged between a power supply and an electro-motor is switch-controlled to generate in steps frequencies lower than a supply frequency. CONSTITUTION:A three-phase AC power supply 1 is led to a transformer 2 for 3-phase.6-phase conversion and each output of the transformer 2 is connected to bi-lateral elements TH respectively of a control restifier 3, whereby the output is fed as input to a 3-phase induction motor 4 and also the respective thyristor elements TH are switch-controlled by a frequency setter 6 and a gate control circuit 5. Accordingly, by switch-controlling each of the 3-phase and each antiphase of each of the 3-phase, voltages with the same polarity are changed-over for a period of more than one cycle of the supply cycle to obtain in steps the frequencies of less than 1/2 of the supply frequency, the electromotor 4 can be driven and the variable speed operation can efficiently be performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15247079A JPS5678390A (en) | 1979-11-27 | 1979-11-27 | Multispeed controlling device of induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15247079A JPS5678390A (en) | 1979-11-27 | 1979-11-27 | Multispeed controlling device of induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5678390A true JPS5678390A (en) | 1981-06-27 |
Family
ID=15541211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15247079A Pending JPS5678390A (en) | 1979-11-27 | 1979-11-27 | Multispeed controlling device of induction motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5678390A (en) |
-
1979
- 1979-11-27 JP JP15247079A patent/JPS5678390A/en active Pending
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