Power supply equipment with burst wave suppressing circuit
A power supply device and circuit technology, applied in the direction of output power conversion device, electrical components, AC power input conversion to DC power output, etc., can solve the problems of damage, reduce the service life of components, reduce the stability of power supply of network equipment, etc., Achieve the effect of simple circuit structure
Inactive Publication Date: 2007-09-26
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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- Abstract
- Description
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- Application Information
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Problems solved by technology
The instantaneous maximum value of the surge current can cause damage to fuses, switches and other components, thereby reducing the service life of components and reducing the stability of power supply for network equipment
Method used
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[0009] FIG. 1 is a block diagram of a power supply device 1 of the present invention. The power supply device 1 includes a transformer circuit 10 , a rectifier circuit 11 and a surge current suppression circuit 12 .
[0010] The transformer circuit 10 is used to receive the input signal V in , and the input signal V in converted to an AC signal. In this embodiment, the input signal V in For the city power signal. The rectifying circuit 11 is connected to the transforming circuit 10 for converting the AC signal output by the transforming circuit 10 into a rectified signal. In this embodiment, the rectified signal is a ripple signal, and the ripple signal is a single-directional sine wave signal. The surge current suppression circuit 12 is connected to the rectification circuit, and is used to suppress the surge current generated in the power supply device 1, and filter the received rectified signal to output a DC signal V out to the load. In this embodiment, the surge cu...
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Abstract
A power source supplying device is used to transform the received signal to direct current signal which fits for load. The power source supplying device includes transformation circuit, commutating circuit and projecting wave current restraining circuit. The transformation circuit is used to transform the received signal to alternated current signal. The commutating circuit is connected with the transformation circuit and is used to transform the alternated signal to the commutating signal. The projecting wave current restraining circuit is connected with the commutating circuit and is used the restrain the projecting wave current generated in the power source, the projecting wave current restraining circuit includes voltage-dividing resistance and filter capacitance. Thereinto, the filter capacitance and the voltage-dividing resistance are in series. The power source supplying device in the invention adopts the projecting wave current restraining circuits to retrain the projecting wave current generated in the circuit, and filter the received signal to make it possess stable output signal to load, the structure of circuit is easy.
Description
【Technical field】 [0001] The invention relates to a surge current suppression circuit, in particular to a power supply device with a surge current suppression circuit applied in a communication network. 【Background technique】 [0002] With the development of science and technology, various network devices, such as Asymmetric Digital Subscriber Loop Modem (ADSL Modem), Cable Modem (Cable Modem), and digital set-top box (Set-top Box) are more and more widely used. These network devices all need a power supply device, which is used to convert the AC voltage of the mains power supply (for example: 220V in mainland China, 110V in North America.) into a DC voltage suitable for network equipment. However, when the power supply device is initially turned on, an unpredictable instantaneous current, ie, an inrush current, will be generated due to the capacitive effect. The instantaneous maximum value of the surge current can cause damage to components such as fuses and switches, ther...
Claims
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Login to View More IPC IPC(8): H02M7/162H02M1/14
Inventor 王信雄杨舜丞江国维
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD