JPS5583493A - Power supply device for ac motor - Google Patents

Power supply device for ac motor

Info

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
Application number
JP15492778A
Other languages
Japanese (ja)
Inventor
Koji Sasaki
Kosaku Ichikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15492778A priority Critical patent/JPS5583493A/en
Publication of JPS5583493A publication Critical patent/JPS5583493A/en
Pending legal-status Critical Current

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
JP15492778A 1978-12-18 1978-12-18 Power supply device for ac motor Pending JPS5583493A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

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