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Driving circuit of DC microwave oven and method of controlling the same

A technology for driving circuits and microwave ovens, applied in microwave heating, electrical components, electric heating devices, etc., can solve problems such as non-production and high manufacturing costs

Inactive Publication Date: 2004-09-22
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there is a problem here that manufacturers hardly produce switches for large currents and require high manufacturing costs

Method used

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  • Driving circuit of DC microwave oven and method of controlling the same
  • Driving circuit of DC microwave oven and method of controlling the same
  • Driving circuit of DC microwave oven and method of controlling the same

Examples

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Effect test

Embodiment Construction

[0026] figure 1 It is a schematic diagram showing the driving circuit of the DC microwave oven according to the first embodiment of the present invention.

[0027] see figure 1 A drive circuit for a DC microwave oven has a DC power supply DC, a door sensor switch DSW, a voltage regulator 30 , a first interlock switch PSW, a second interlock switch SSW and a microcomputer 40 .

[0028] In addition, the drive circuit of the DC microwave oven includes a pulse drive unit VFC1, a push-pull circuit with first and second field effect transistors FET1 and FET2, a high-voltage transformer HVT, a magnetron MGT, a door lamp L, a fan motor F, a first and the second relay switches RY1 and RY2 and the first and second monitor switches MSW1 and MSW2.

[0029] The push-pull circuit supplies the inverter unit from the power supply DC to the primary winding T1 of the high voltage transformer HVT through the driving of the first and second field effect transistors FET1 and FET2 according to th...

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PUM

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Abstract

The present invention relates to a driving circuit of a DC microwave oven and a method of controlling the same for driving a magnetron through a conversion of a DC voltage into an AC voltage. The driving circuit includes an excessive current detecting unit is provided for detecting a current supplied from the DC power supply to the inverting unit, and outputting an excessive current detecting signal to the pulse driving unit to cut off the generation of the driving pulses of the pulse driving unit if the detected current corresponds to an excessive current. The driving method includes a) driving the pulse driving unit by controlling the switching unit if a cooking chamber door is closed and a cooking start selection signal is inputted; b) detecting whether an excessive current is supplied to the high voltage transformer through the inverting unit driven by the pulse driving unit; and c) cutting off the voltage supply to the magnetron by stopping the driving of the pulse driving unit if the excessive current is detected.

Description

technical field [0001] The invention relates to a driving circuit of a DC microwave oven and a control method thereof, in particular to a driving circuit of a DC microwave oven and a control method thereof for converting DC voltage to AC voltage. Background technique [0002] A common AC microwave oven is suitable for generating microwaves by driving a magnetron with an AC voltage of 110-230V. [0003] At the same time, a DC microwave oven has been developed, which can be used in areas outside cities or in various means of transportation, such as vehicles, boats, airplanes, etc., which can hardly use the AC voltage of the mains. [0004] Generally, a DC microwave oven drives a magnetron by converting a DC voltage from a battery as a DC power source into an AC voltage through an inverter. [0005] A DC microwave oven using an ordinary 12V or 24V DC battery requires a large current of 30A to 100A to drive its magnetron. Accordingly, switches are required to fully receive a l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B6/68F24C7/02F24C7/08H05B6/64H05B6/66
CPCH05B6/6417F24C7/08
Inventor 韩龙云张成德姜光锡成翰俊
Owner SAMSUNG ELECTRONICS CO LTD