JPS57206300A - Driving system for ac motor using inverter - Google Patents
Driving system for ac motor using inverterInfo
- Publication number
- JPS57206300A JPS57206300A JP56088891A JP8889181A JPS57206300A JP S57206300 A JPS57206300 A JP S57206300A JP 56088891 A JP56088891 A JP 56088891A JP 8889181 A JP8889181 A JP 8889181A JP S57206300 A JPS57206300 A JP S57206300A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- phase difference
- inverter
- factor
- output voltage
- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/26—Power factor control [PFC]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE:To operate a motor at a high power-factor at all times by a method wherein the phase difference of the voltage and the current coming from an inverter is detected, and the output voltage of the inverter is dropped and the exciting current is reduced when there exists a large phase difference and the power-factor of the motor is unsatisfactory. CONSTITUTION:The output voltage and current of the inverter 1 which drives the AC motor is inputted to a phase difference detector 5, and when the phase difference is 0 deg., a positive signal is outputted, zero signal is outputted at 90 deg., a negative signal is outputted at 180 deg., a set point is subtracted using a subtracting machine 7 after the output has passed through an absolute value arithmetic operation unit 6, then the output and a frequency command are multiplied and the result is used as the output voltage command for the inverter 1. Accordingly, when the load is light and the phase difference is large and the power-factor to the motor is unsatisfactory, exciting current is reduced and the improvement of the power-factor is contrived, and when the phase difference is large and a regenerative state is present, the output voltage can be increased again, thereby enabling to drive the motor at a high power-factor at all times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56088891A JPS57206300A (en) | 1981-06-11 | 1981-06-11 | Driving system for ac motor using inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56088891A JPS57206300A (en) | 1981-06-11 | 1981-06-11 | Driving system for ac motor using inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57206300A true JPS57206300A (en) | 1982-12-17 |
Family
ID=13955591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56088891A Pending JPS57206300A (en) | 1981-06-11 | 1981-06-11 | Driving system for ac motor using inverter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57206300A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007110837A (en) * | 2005-10-13 | 2007-04-26 | Denso Corp | Method for estimating magnetic pole position and motor controller |
| US11056995B2 (en) * | 2017-10-27 | 2021-07-06 | System Homes Company, Ltd. | Synchronous motor drive system and synchronous motor drive method |
-
1981
- 1981-06-11 JP JP56088891A patent/JPS57206300A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007110837A (en) * | 2005-10-13 | 2007-04-26 | Denso Corp | Method for estimating magnetic pole position and motor controller |
| JP4674525B2 (en) * | 2005-10-13 | 2011-04-20 | 株式会社デンソー | Magnetic pole position estimation method and motor control apparatus |
| US11056995B2 (en) * | 2017-10-27 | 2021-07-06 | System Homes Company, Ltd. | Synchronous motor drive system and synchronous motor drive method |
| US11496082B2 (en) | 2017-10-27 | 2022-11-08 | System Homes Company, Ltd. | Synchronous motor drive system and synchronous motor drive method |
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