TH42003A3 - High frequency heating equipment - Google Patents

Abstract

DC60 (28/10/42) The high frequency heating device consists of a magnetron drive circuit. It consists of a leakage transformer, a second capacitor connected in series with the primary winding of the leakage transformer, a second switching device connected in parallel to the series circuit of the primary winding and a capacitor connected to the primary winding. Second, the first capacitor connected in parallel to the second switching device. And the first switching device That is connected in series with the second switching device Under the structure of this invention, switching devices and The leakage transformer is an integral part of the circuit and may be used as part of the circuit. Of 200 V - 240 V commercial power supply or 100 - 120 N commercial power supply circuit, which allows large quantities of this critical component to be produced, resulting in lower costs of Components, as well as the cost of the heating equipment. The high-frequency heating device consists of a magnetron drive circuit. Consists of a leaking transformer, a capacitor that Two switching devices connected in series to the primary winding of the transformer, a second switching device connected in parallel with the series winding circuit. Basic and secondary capacitors, the first capacitor Parallel to the second switching device And the first switching device That is connected in series with the second switching device Under the structure Of this invention, switching devices and Transformer leaking will be An integral component of the circuit and may be used as a combination of a 200 V - 240 V commercial supply circuit or source circuit. The commercial power supply is 100 -120 N, which allows large quantities of this vital component to be produced. Resulting in reduced costs of Components as well as the cost of Heating device

Claims (2)

1. High frequency heating equipment consists of; The DC supply transformer is leaking connected to the positive connection of the said DC supply, a second capacitor connected in series to the coil. The primary wire of the transformer leaks such, the switching device at The second switching device is connected to the positive connection of the DC supply, the first capacitor connected in parallel to the second switching device, the first switching device connected in series with. The second switching device and is also connected to The negative connection of such DC supply, the drive part for driving the first switching device and The second such switching device, the sorting part The show connected to the secondary winding of the said leakage transformer and the magnetron connected to the rectifying section 2. The high frequency heating device of claim 1 is a type with a capacitor. The second will be provided with the capacitance value. 3. The high frequency heating device of claim 1 is a type where the correlation between the capacitance C2 of the second capacitor, the inductance Lead the primary winding L1 of the transformer leaking. The resonant frequency fr is assigned to fR = 1 / (2 x (pi) x (formula) (L1 x C2)) and the working frequency fo of the drive segment corresponds to 2.45 &lt; (Formula) (L1 x C2) <3.55 1.38 &lt; fo / fR &lt; 4 4. High frequency heating device of claim 1 is the type that the serial circuit is The first capacitor, the second capacitor, and the leakage transformer are defined in one of the following constructions, (1) the first capacitor is connected in parallel with the switching device. Second and cycle Series of the second capacitor and the primary winding Of transformer leakage will be connected In parallel with the second switching device (2), the first capacitor is connected in parallel with the switching device. First and cycle The series of the second capacitor and the primary winding The landscape is connected in parallel with the switching device. The second (3) capacitor one is connected in parallel with the switching device. The first and the circle The series rode of the second capacitor and the primary winding. The landscape is connected in parallel with the switch device. As mentioned above, or (4) the first capacitor is connected in parallel with the switching device. The second and the circle The series of such secondary capacitors And the primary winding is connected in parallel with the first switching device. 5. The high frequency heating device mentioned in one of the claims 1 to 4 is the DC supply from the commercial power supply. 200 V - 240 V, where the greater the potential difference of The higher the commercial power supply, the greater the secondary capacitance of the secondary capacitor, while the transformer leakage constants are associated with the primary winding inductance, the secondary winding inductance and Primary coil matching coefficient 6. The high frequency heating equipment mentioned in one of claims 1 through 4 consists of a DC supply which is derivative from a rectified commercial power supply. In which the examination Capture the DC supply voltage difference and the pulse width modulation segment, which takes the output of the section. The voltage detection is a fundamental signal where the signal from the pulse width modulation segment is sent to the driving segment and the driving segment drives the switching device according to the signal 7. . The high-frequency heating device of claim 6 is the modulation section. Pulse width will be provided with 8. The high-frequency heating device mentioned in one of claims 1 through 4 consists of a DC supply which is derivative from a commercial power supply. Rectify In which the examination Capture the potential difference for the voltage detection of the aforementioned DC source and for the modulation section. The output frequency of the aforementioned voltage sensing section is a fundamental signal, where the signal from the pulse width modulation segment is sent to the driving section and the said drive section drives the Swiss device. According to the aforementioned signal 9. The high frequency heating device of claim 8 is a type that the modulation part. The frequency will be provided along with the Operate the limit for the lower limit setting of the frequency 1 0. The high-frequency heating device of claim 8 consists of a section for setting the default frequency for providing. Initial frequency modulation to show control at pinned frequency 1 1. The high frequency heating device of claim 10 is the type that the frequency modulation Will be paid as soon as the magnetron Start work 1 2. High frequency heating equipment of claim 6 or 8 is a magnetized design. The nitron is controlled through both modulation Pulse width modulation and frequency modulation with sequences given on the output control through pulse width modulation to The output is controlled through frequency modulation 1 3. The high-frequency heating device mentioned in one of claims 1 to 4 is a type where the first resistor and the resistor. The second resistor in series is connected in parallel to the aforementioned DC supply, and the connections of the first and second resistor are connected to the junction of the first switching device and the first resistor. 1 4. The high frequency heating device of claim 1 consists of a DC supply built with a rectifier section. And a filter consisting of an inductor and a third capacitor For smoothing the output of the rectification section, which is subsequently equipped with a suction Swallow the strong current at the outlet end of the filter. 1 5. The high frequency heating device of claim 1 consists of a DC supply consisting of a rectifier section and a A filter incorporated with an inductor and a capacitor to smooth the output of the rectifier section. Which also consists of the following Absorb electricity 1 6. The high-frequency heating device of claim 1, including the high-frequency heating device, is connected in parallel with the semiconductor device. Different potential and the stopping control is a The potential difference detects the potential difference at the junction of the primary winding. The landscape of the transformer leaks, and such a second capacitor is connected in series and sends a signal to the control stop. Which control part Stopping stops the driving portion of that signal. 1 7. The high frequency heating device of claim 16 is the type that the sensing section. Such a potential difference detects the potential difference. Of such capacitors of such DC supply 1 8. The high frequency heating device of claim 16 is the type that the sensing part. That potential difference detects the potential difference to be used. On the first switching device 1 9. The high-frequency heating device of claim 1, which is subsequently included in the serial circuit Of the third resistor and the resistor A fourth is provided between the connection of the leaking transformer and the second capacitor and the negative connection of the aforementioned DC supply 2 0. Heating device. The high frequencies mentioned in claim 19 consist of the following. The comparator is connected to the fourth resistance where the comparator Such will compare the differences. The potential of the said fourth resistor to the reference value and Control the driving section 2 1.Heating equipment The high frequency is described in one of claims 1 to 4 where the DC supply consists of a fall protection device located at the pin of the circuit component. Installed on a printed circuit board It is intended to protect circuit components from falling. And contact with other circuit components with different voltages 2 2.Heating equipment The high frequency mentioned in one of claim 21 is type one in The assembled circuit components are also used for fall protection.