JPS54141307A - Control unit for induction melting furnace - Google Patents
Control unit for induction melting furnaceInfo
- Publication number
- JPS54141307A JPS54141307A JP4932378A JP4932378A JPS54141307A JP S54141307 A JPS54141307 A JP S54141307A JP 4932378 A JP4932378 A JP 4932378A JP 4932378 A JP4932378 A JP 4932378A JP S54141307 A JPS54141307 A JP S54141307A
- Authority
- JP
- Japan
- Prior art keywords
- control
- current
- power factor
- furnace
- phase
- 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
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
PURPOSE: To provide a control unit for induction melting furnace equipped with a circuit with best combination of three phase balance control and power factor control.
CONSTITUTION: Power factor is controlled by detecting the reactive current portion of the current for an induction melting furnace F, i.e., a load, from the furnace current input given through a transformer CT1 and the furnace voltage input given through a transformer PT1 by a reactive-current-detecting circuit A, so as to make the reactive current become nearly zero, i.e., the power factor becomes nearly 1.0. The furnace current input iRS and the T phase current input iT are converted into a d.c. level and computed by means of a computing-amplifying unit 0A3 so that a prescribed equation may hold, then positive or negative d.c. level signals depending upon balancer quantities are obtained. According to the signals, a control circuit C' is operated so as to perform three-phase balancer control. Hence a transformer is used for both the three phase balancer control and the power factor control, consequently, the control unit is miniaturized.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4932378A JPS54141307A (en) | 1978-04-27 | 1978-04-27 | Control unit for induction melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4932378A JPS54141307A (en) | 1978-04-27 | 1978-04-27 | Control unit for induction melting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54141307A true JPS54141307A (en) | 1979-11-02 |
Family
ID=12827759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4932378A Pending JPS54141307A (en) | 1978-04-27 | 1978-04-27 | Control unit for induction melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54141307A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241250A (en) * | 2015-11-16 | 2016-01-13 | 四川华索自动化信息工程有限公司 | Intelligent discharging device for carbon roasting furnace based on voltage protection circuit |
| US11190065B2 (en) | 2013-01-24 | 2021-11-30 | Clearwater Holdings, Ltd. | Flux machine |
| US11189434B2 (en) | 2017-09-08 | 2021-11-30 | Clearwater Holdings, Ltd. | Systems and methods for enhancing electrical energy storage |
| US11322995B2 (en) | 2017-10-29 | 2022-05-03 | Clearwater Holdings, Ltd. | Modular electromagnetic machines and methods of use and manufacture thereof |
-
1978
- 1978-04-27 JP JP4932378A patent/JPS54141307A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11190065B2 (en) | 2013-01-24 | 2021-11-30 | Clearwater Holdings, Ltd. | Flux machine |
| US11539252B2 (en) | 2013-01-24 | 2022-12-27 | Clearwater Holdings, Ltd. | Flux machine |
| CN105241250A (en) * | 2015-11-16 | 2016-01-13 | 四川华索自动化信息工程有限公司 | Intelligent discharging device for carbon roasting furnace based on voltage protection circuit |
| US11189434B2 (en) | 2017-09-08 | 2021-11-30 | Clearwater Holdings, Ltd. | Systems and methods for enhancing electrical energy storage |
| US11948742B2 (en) | 2017-09-08 | 2024-04-02 | Clearwater Holdings Ltd. | Systems and methods for enhancing electrical energy storage |
| US11322995B2 (en) | 2017-10-29 | 2022-05-03 | Clearwater Holdings, Ltd. | Modular electromagnetic machines and methods of use and manufacture thereof |
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