Low-power AC power supply without power frequency transformer and linear adaptation method
A technology without a power frequency transformer and an AC power supply, which is applied in the direction of irreversible DC power input conversion to AC power output, high-efficiency power electronic conversion, DC power input conversion to DC power output, etc., and can solve the conversion efficiency of AC power output power. Low power, low precision, large volume and large heat sink of AC power supply and low power output, etc., to achieve the effect of improving power conversion efficiency and output accuracy, and reducing power consumption
Active Publication Date: 2017-09-05
ITECH ELECTRONICS NANJING
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Problems solved by technology
[0003] The purpose of the present invention is to provide a low-power AC power supply without a power frequency transformer to solve the problems of large volume, large radiator and low power output of the AC power caused by the use of a power frequency transformer. The linear adaptation method between the DC voltage and the AC voltage in the power supply solves the problems of low conversion efficiency, high energy consumption and low precision of the output power of the AC power supply
Method used
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Embodiment Construction
[0023] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0024] Embodiment As shown in the figure, this embodiment provides a low-power AC power supply without a power frequency transformer, including a DC power part, an AC power part, and a digital and reference part.
[0025] The DC power part is a high-frequency switching power supply circuit, including a first rectification filter circuit, a DC-to-AC circuit, a second rectification filter circuit, a first sampling circuit and a first feedback control circuit; the AC power part includes a power amplifier, a boost amplifier, The second sampling circuit and the second feedback control circuit; the digital and reference part includes a digital processing part and a parameter input part; the first rectifying circuit, the DC-to-AC circuit, the second rectifying and filtering circuit, the power amplifier and the step-up transformer are connected in seq...
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The invention provides a low-power AC power supply without power frequency transformer and a linear adaptation method, including a DC power part, an AC power part and a digital and reference part, the DC power part is a high-frequency switching power supply circuit, and the high-frequency switching power supply The circuit supplies the DC voltage to the AC power part; the AC power part changes the DC voltage output by the DC power part into an AC voltage output; the digital and reference part generates the AC voltage reference and the DC voltage reference, and the DC voltage reference controls the DC voltage of the DC power part The output linearity is adapted to the AC voltage output; the output DC voltage of the DC power part will follow the change of the AC voltage output by the AC power part for automatic linear adaptation adjustment, which reduces the power consumption of the amplifier circuit and improves the power conversion efficiency of the whole machine and output accuracy.
Description
technical field [0001] The invention relates to a low-power AC power supply without a power frequency transformer, and also relates to a linear adaptation method between the DC voltage and the AC voltage. Background technique [0002] At present, the existing technology of AC power supply on the market is basically realized by the power frequency transformer supplying power to the amplifier circuit of the subsequent stage. When the AC voltage output by the AC power supply becomes lower, the power supply voltage of the power frequency transformer will not change accordingly. , the energy will be lost in the amplifying circuit, increasing the power consumption of the amplifying circuit, and requiring a large-volume radiator to dissipate heat from the AC power supply; at the same time, there is also a large volume, which cannot increase the output power under a limited volume ; In addition, there is also the problem that the conversion efficiency of the AC power supply is low a...
Claims
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IPC IPC(8): H02M5/42H02M7/44H02M3/24
CPCH02M5/42H02M7/44H02M1/0012H02M1/0048Y02B70/10
Inventor 房建国肖晓华孙益余
Owner ITECH ELECTRONICS NANJING