High-frequency heater

A technology of high-frequency heating device and power supply device, which is applied in microwave heating and other directions, can solve the problems of device influence, current circuit breaker shutdown, and heating of components of high-frequency heating device.
CN1389084AInactive Publication Date: 2003-01-01SHARP KK
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
SHARP KK
Publication Date
2003-01-01
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A high-frequency heater ensures a constant breaking current, maximizes input current, and thus produces a maximum high-frequency output efficiently. In this high-frequency heater, a power supply (1) is connected in a supply line associated with an overcurrent relay (4a), and a power converter (2) converts the power from the power supply (1) to high-frequency power and supplies it to a magnetron (15). A control circuit (20) supplies a signal to an inverter controller (10) to control input current so that the input current characteristic of the high-frequency heater may become close to the current breaking characteristic with time of the overcurrent relay (4a).
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Description

technical field

[0001] The present invention relates to a high-frequency heating device which uses a semiconductor power converter for generating high-frequency power as a power supply unit. Background technique

[0002] The circuit diagram of the traditional high-frequency heating device is in Figure 7 with Figure 9 is shown in , while its corresponding current control mode as Figure 8 with Figure 10 shown.

[0003] That said, there are generally two types of input current control modes: The first is through Figure 7 The configuration is realized, at this time the current is according to the Figure 8 The control characteristics shown in (a) and 8(b) are controlled according to the primary current (see Japanese Patent Application Publication No. Hei 11 No. 283737); the second mode is through Figure 9 The configuration is realized, at this time the current is according to the Figure 10 The control characteristics shown are controlled according to the secondary cu...

Claims

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