JPS5583493A - Power supply device for ac motor - Google Patents
Power supply device for ac motorInfo
- Publication number
- JPS5583493A JPS5583493A JP15492778A JP15492778A JPS5583493A JP S5583493 A JPS5583493 A JP S5583493A JP 15492778 A JP15492778 A JP 15492778A JP 15492778 A JP15492778 A JP 15492778A JP S5583493 A JPS5583493 A JP S5583493A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- motor
- supply device
- capacitors
- switches
- 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 make it possible to reduce greatly the capacitance required in the low frequency region by the structure such that the capacitor of the power-factor improvement device can be arranged in either Y-connection or Δ-connection.
CONSTITUTION: At the time of starting, switch 2 is turned on, and at the same time, switches Ctt-1, Ctt-2,..., Ctt-m are turned on; and all capacitors are delta- connected, and the load power factor viewed from the power supply is set at one. Next, when motor 3 is accelerated and synchronized with the preset minimum frequency, the frequency of power supply 1 is raised, and at the same time, switches Ctt-1, Ctt-2, ..., Ctt-m, Ctt-1A∼Ctt-mA are controlled, and the Δ- or Y-connections of the capacitors are switched or separated so that the load power factor viewed from power supply 1 becomes one.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15492778A JPS5583493A (en) | 1978-12-18 | 1978-12-18 | Power supply device for ac motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15492778A JPS5583493A (en) | 1978-12-18 | 1978-12-18 | Power supply device for ac motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5583493A true JPS5583493A (en) | 1980-06-23 |
Family
ID=15594981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15492778A Pending JPS5583493A (en) | 1978-12-18 | 1978-12-18 | Power supply device for ac motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5583493A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61236390A (en) * | 1985-02-26 | 1986-10-21 | ゼネラル・エレクトリツク・カンパニイ | Ac motor driver |
-
1978
- 1978-12-18 JP JP15492778A patent/JPS5583493A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61236390A (en) * | 1985-02-26 | 1986-10-21 | ゼネラル・エレクトリツク・カンパニイ | Ac motor driver |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54106832A (en) | Operation control method for a/d converter | |
JPS5385350A (en) | Control system for multi-terminal dc transmission system | |
JPS5583493A (en) | Power supply device for ac motor | |
JPS558221A (en) | Circuit for starting motor | |
JPS5728579A (en) | Starting device of squirrel-cage induction motor | |
JPS558278A (en) | Power control system of high frequency inverter | |
FR2317803A1 (en) | Controlled single phase bridge for electric vehicles - has power factor optimised using diodes but without using commutating thyristors | |
JPS54104535A (en) | Current controlling inverter | |
JPS53114028A (en) | Inverter controlling lead angle control circuit | |
JPS5438523A (en) | Inverter | |
JPS54121919A (en) | Single phase capacitor motor enabling variable frequency operation | |
JPS53145014A (en) | Motor drive inverter control system | |
JPS5341709A (en) | Start of commutator-less electric motor | |
JPS5366550A (en) | Control circuit for reactive power compensator | |
JPS55166484A (en) | Power unit for ac motor drive | |
JPS5379250A (en) | Electric machine | |
JPS5579699A (en) | Speed controller for squirrel-cage induction motor | |
JPS54134328A (en) | Different frequency output inverter | |
JPS5563585A (en) | Operation control device for group of ac electric motor | |
JPS5532457A (en) | Speed controller for electric motor | |
JPS5559514A (en) | Ac constant current circuit | |
JPS51114896A (en) | Drive method | |
JPS5344830A (en) | Variable frequency inverter unit | |
JPS57189563A (en) | 3-phase ac voltage controller | |
JPS547515A (en) | Induction motor controller |