JPS6431390A - Control circuit for inverter system high-frequency heating device - Google Patents
Control circuit for inverter system high-frequency heating deviceInfo
- Publication number
- JPS6431390A JPS6431390A JP18710787A JP18710787A JPS6431390A JP S6431390 A JPS6431390 A JP S6431390A JP 18710787 A JP18710787 A JP 18710787A JP 18710787 A JP18710787 A JP 18710787A JP S6431390 A JPS6431390 A JP S6431390A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- inverter
- pulse width
- operation amplifier
- power source
- 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 obtain a constant power type pulse width control circuit with a simple structure by changing the pulse width with the voltage applied with the dividing, adding, and subtracting process on the voltage corresponding to the inverter input current and the voltage corresponding to the commercial input voltage. CONSTITUTION:The voltage Va proportional to the commercial power source voltage by voltage dividing resistors 12, 13, an impedance converting operation amplifier 17 or the like and the reference voltage Vc obtained by dividing the control power source voltage from a terminal 9 by voltage dividing resistors 10, 11 are processed in the subtracting circuit 24 of the operation amplifier to obtain the voltage Va-Vc, which is further made the comparison reference voltage Ve via the adding circuit 30 of the operation amplifier. On the other hand, the inverter current via a current transformer 2 is rectified by a diode bridge 3 or the like, and the voltage Vb proportional to the pulse voltage from the inverter is generated from an impedance converting operation amplifier 6. These voltage Vb, Ve are fed, the output pulse width of the inverter is feedback-controlled so that the voltage Vb is made equal to Ve by a control IC 23, and the constant power type pulse width control is performed with a simple structure even if the commercial power source voltage is changed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18710787A JPS6431390A (en) | 1987-07-27 | 1987-07-27 | Control circuit for inverter system high-frequency heating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18710787A JPS6431390A (en) | 1987-07-27 | 1987-07-27 | Control circuit for inverter system high-frequency heating device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6431390A true JPS6431390A (en) | 1989-02-01 |
Family
ID=16200224
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18710787A Pending JPS6431390A (en) | 1987-07-27 | 1987-07-27 | Control circuit for inverter system high-frequency heating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6431390A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61211988A (en) * | 1985-03-18 | 1986-09-20 | 三洋電機株式会社 | Frequency driving circuit for magnetron |
-
1987
- 1987-07-27 JP JP18710787A patent/JPS6431390A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61211988A (en) * | 1985-03-18 | 1986-09-20 | 三洋電機株式会社 | Frequency driving circuit for magnetron |
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