Detection device of large-power induction cooker shifted full bridge hard switch and detection method thereof

A high-power induction cooker, phase-shifting full-bridge technology, which is used in household stoves/stoves, electric heating fuel, household heating, etc., can solve problems such as IGBT damage of lagging bridge arms

Inactive Publication Date: 2011-01-05
GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Detection device of large-power induction cooker shifted full bridge hard switch and detection method thereof
  • Detection device of large-power induction cooker shifted full bridge hard switch and detection method thereof
  • Detection device of large-power induction cooker shifted full bridge hard switch and detection method thereof

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0022] Such as image 3 As shown, the detection device of the phase-shifting full-bridge hard switch of the high-power induction cooker of the present invention includes a phase-shifting full-bridge circuit 1 installed on the surface of the heat sink 7 of the core of the induction cooker, a logic drive circuit 2, a microcontroller 3, and a first temperature sampling Circuit 41, the second temperature sampling circuit 42, the first temperature-sensing probe 51, the second temperature-sensing probe 52 and the power supply circuit 6, wherein the input end of the power supply circuit 6 is connected to the mains, and the output end is respectively connected to the logic drive circuit 2, micro The controller 3, the first temperature sampling circuit 41, and the second temperature sampling circuit 42 are connected, and the first temperature sensing probe 51 an...

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Abstract

The invention discloses a detection device of a large-power induction cooker shifted full bridge hard switch, comprising a shifted full bridge circuit, a logic driving circuit, a microcontroller, a first temperature sampling circuit, a second temperature sampling circuit, a first temperature sensing probe, a second temperature sensing probe and a power circuit, wherein the shifted full bridge circuit is installed on the surface of a induction cooker movement radiator. The detection device is characterized in that the first temperature sensing probe and the second temperature sensing probe are installed in the installation area of the shifted full bridge circuit on the surface of the movement radiator. The invention also discloses a detection method which comprises the following steps: 1. setting a reference value Test; 2. reading the temperature sampling value AD 1 of a lagging leg in the shifted full bridge circuit by the first temperature sampling circuit, and reading the temperature sampling value AD 0 of a lead leg in the shifted full bridge circuit by the second temperature sampling circuit; and 3. judging whether the difference of the temperature sampling value AD 1 of the lagging leg and the AD 0 of the lead leg is more than the reference value Test by the microcontroller; if no, returning to a main program; and if yes, cutting off the lagging leg and the lead leg by the logic driving circuit. The invention can effectively protect the lagging leg.

Description

technical field [0001] The invention relates to a detection device and a detection method of a phase-shifting full-bridge hard switch, in particular to a detection device and a detection method of a phase-shifting full-bridge hard switch of a high-power electromagnetic cooker. Background technique [0002] The phase-shifting full-bridge switching circuit of the induction cooker includes a lagging bridge arm and a leading bridge arm composed of switching devices IGBT. figure 1 As shown, the voltage phase II is ahead of the current phase I, the leading bridge arm IGBT is turned on at zero voltage, and the lagging bridge arm IGBT is turned on at zero current. The switching losses of the leading bridge arm IGBT and the lagging bridge arm IGBT are basically the same, and the temperature difference is very small. [0003] When the load is abnormal, such as water entering the coil plate of the induction cooker and causing a short circuit between turns, the inductance of the coil p...

Claims

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Application Information

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IPC IPC(8): F24C7/08
Inventor 金红旗李彦栋朱云林
Owner GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD
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