JPS6431390A - Control circuit for inverter system high-frequency heating device - Google Patents

Control circuit for inverter system high-frequency heating device

Info

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
Application number
JP18710787A
Other languages
Japanese (ja)
Inventor
Shigeru Kusuki
Naoyoshi Maehara
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP18710787A priority Critical patent/JPS6431390A/en
Publication of JPS6431390A publication Critical patent/JPS6431390A/en
Pending legal-status Critical Current

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.
JP18710787A 1987-07-27 1987-07-27 Control circuit for inverter system high-frequency heating device Pending JPS6431390A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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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