Wide-input voltage power supply of power distribution terminal
A technology of voltage power supply and distribution terminal, which is applied in the direction of converting irreversible AC power input to DC power output, electrical components, emergency protection circuit devices, etc. problem, to achieve the effect of stable power output, improved circuit performance and work stability, and increased integration.
Inactive Publication Date: 2015-07-08
ZHUHAI XUJIZHI ELECTRIFIED WIRE NETING AUTOMATIONCO +2
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Problems solved by technology
When the voltage of the 10KV power grid fluctuates greatly, the output voltage of the voltage transformer will also fluctuate greatly. Since the operating voltage range of the existing distribution network terminals is 80%Un-150%Un, when the fluctuation is greater than the rated value When more than 50% of the power distribution terminal cannot work normally, the monitoring of the distribution network cannot be realized
Method used
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Embodiment Construction
[0013] The invention is improved on the existing RCC power supply. refer to figure 1 and figure 2 , the power supply of the present invention includes an AC-DC conversion circuit 1, a transformer 2, a switch tube 3, a switch tube startup circuit, a drive circuit, a drive bypass, a voltage regulator circuit, and an overcurrent protection circuit. diode. Among them, the reverse diode, the start-up circuit of the switching tube, the drive bypass without the bypass capacitor, the voltage regulation circuit without the potentiometer, and the overcurrent protection circuit without the sampling resistor are constructed as an independent thick-film circuit unit 4 . The thick-film circuit unit 4 is generally made by silk-screen printing technology, and is suitable for high-voltage, high-current, and high-power occasions, so it is especially suitable for this power supply system. This unit greatly increases the integration of the system, making assembly and maintenance work Easier. ...
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The invention discloses a wide-input voltage power supply of a power distribution terminal. The wide-input voltage power supply comprises an alternating current-direct current conversion circuit, a transformer, a switching tube, a switching tube starting loop, a driving loop, a driving bypath, a constant voltage modulation circuit and an over-current protection circuit, wherein an independent thick-film circuit unit is composed of the switching tube starting loop, the driving bypath without a bypath capacitor, the constant voltage modulation circuit without a potentiometer and a current sampling circuit without a sampling resistor. According to the wide-input voltage power supply disclosed by the invention, the constant voltage modulation circuit is arranged so that voltage can be intelligently modulated by changing the potentiometer, and the output of the power supply is stable; the over-current protection circuit is arranged so as to ensure the reliability of the work of the power supply; part of circuit sets are arranged into the form of the thick-film circuit unit based on the properties so as to greatly increase the integration degree of the circuit; the structure of the circuit is more compact; and the circuit performance and the working stability are improved.
Description
technical field [0001] The invention relates to power supply technology for power distribution terminals, in particular to a wide input voltage power supply for power distribution terminals. Background technique [0002] The existing distribution network terminal, especially the pole-mounted terminal, is installed outdoors, and it is impossible to use the power supply method of ordinary mains power. Therefore, the power supply is obtained by using a voltage transformer, that is, a PT power supply method. The transformer equipment directly converts the 10KV line voltage to The AC voltage of 220V or 110V level is used for distribution network terminals. When the voltage of the 10KV power grid fluctuates greatly, the output voltage of the voltage transformer will also fluctuate greatly. Since the operating voltage range of the existing distribution network terminals is 80%Un-150%Un, when the fluctuation is greater than the rated value When more than 50% of the power distri...
Claims
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IPC IPC(8): H02M7/06H02M3/06H02M1/36H02M1/32H02H7/10
Inventor 苏宏勋秦卫东詹植振
Owner ZHUHAI XUJIZHI ELECTRIFIED WIRE NETING AUTOMATIONCO