Self-exciting switching power supply
A switching power supply, self-excited technology, applied in the direction of electrical components, adjusting electrical variables, instruments, etc., can solve the problem of large errors in voltage adjustment rate and load adjustment rate, large errors in voltage accuracy and output ripple, and easy damage Problems such as switching transistors have been solved to achieve stable and reliable work, reasonable winding methods, and low manufacturing costs.
Inactive Publication Date: 2009-01-21
SHANGHAI MITSUOKA ELECTRONICS CO LTD
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Problems solved by technology
[0002] The circuit of the current self-excited switching power supply is relatively complicated, and there is no vibration elimination and high frequency ripple elimination circuit, so the error of voltage accuracy and output ripple is relatively large, and the error of voltage adjustment rate and load adjustment rate is also large. In addition, the high-frequency self-excited oscillating circuit of the switching power supply will generate an oscillating pulse. The oscillating pulse is approximately a rectangular wave with a large positive and negative peak oscillation waveform. Such an oscillation waveform is not only easy to damage the switching transistor, but also Large power consumption, large AC high-frequency ripple
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[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0012] The present invention mainly includes a casing and a power supply circuit installed in the casing, which is different from the prior art in that: the power supply circuit is a full-wave voltage doubler rectification and filter circuit 1 with high-frequency self-excited oscillation and vibration-eliminating high-frequency ripple The wave elimination circuit 2 is connected, the high-frequency self-excited oscillation and vibration elimination high-frequency ripple elimination circuit are respectively connected with the secondary rectification and filter circuit 3, the sampling voltage stabilization control overvoltage control short-circuit overcurrent control circuit 4 is connected, the secondary rectification and The filter circuit is connected with the sampling voltage stabilization control overvoltage control short-circuit overcurrent control cir...
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This invention discloses one self-exciting switch power, which is characterized by the following: the said power circuit is of whole wave commute and filter circuit and high frequency autoexcitation and damping frequency eliminating circuit, wherein the autoexcitation and the circuit are connected to the twice commute and filter circuit and the sample stable control shortcut circuit. The twice commute and filter circuit are connected to the over the control circuit.
Description
Technical field: [0001] The invention belongs to the technical field of switching power supplies, and in particular relates to a self-excited switching power supply. Background technique: [0002] The circuit of the current self-excited switching power supply is relatively complicated, and there is no vibration elimination and high frequency ripple elimination circuit, so the error of voltage accuracy and output ripple is relatively large, and the error of voltage adjustment rate and load adjustment rate is also large. In addition, the high-frequency self-excited oscillating circuit of the switching power supply will generate an oscillating pulse. The oscillating pulse is approximately a rectangular wave with a large positive and negative peak oscillation waveform. Such an oscillation waveform is not only easy to damage the switching transistor, but also The power consumption is large, and the AC high-frequency ripple is large. Invention content: [0003] The purpose of t...
Claims
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IPC IPC(8): H02M3/28H02M3/338
Inventor 沈照荣
Owner SHANGHAI MITSUOKA ELECTRONICS CO LTD