Microwave magnetron single power source for medical purpose

Abstract

The present invention discloses a microwave magnetron single power supply for medical use, which comprises a bridge rectification circuit and a transformer equipped with a primary winding a high voltage secondary winding, and a low-voltage secondary winding for providing voltage for magnetron filament, as an improvement, the output end of the rectification circuit is also provided with a constant-current source control circuit.

Description

technical field [0001] The invention relates to a power supply of a medical microwave magnetron, which is suitable for a microwave treatment machine and provides stable and reliable working voltage for it. Background technique [0002] Before 1986, almost all medical microwave therapy machines used in my country were imported from abroad. At that time, the most prominent clinical problem was the pollution of microwave to the environment. Microwave clinical therapy could only be carried out in shielded rooms of big hospitals in big cities. Invention patents ZL90106763.6, ZL90106764.4, ZL90104294.3, and ZL90104295.1 have improved the above problems and realized high-efficiency local radiation of microwaves, so that microwave clinical treatment can be carried out outside the shielded room of the hospital. In recent years, because microwave therapy has entered the outpatient wards of various clinical disciplines and achieved good clinical curative effect, microwave therapy has b...

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Problems solved by technology

If a single power supply is simply used, the filament power supply voltage will also be changed when the power is adjusted to change the high voltage, so that the magnetron cannot work normally and directly affects the working stability and service life of the magnetron, which is not allowed

[0004] At present, there are two factors that restrict microwave therapy machines from entering the family. One is that due to the nonlinearity of the external characteristics of microwave magnetrons (that is, the relationship between output power and input voltage), a small change in input voltage will make the output power Very large changes may occur, which may cause burns on the patient's treatment site. Therefore, the microwave treatment machine in public use can only be used in hospitals under the guidance of doctors; another factor is that the cost of the microwave treatment machine is relatively high, and it is difficult for patients to buy and sell.

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