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1. 发明申请

US20190025363A1 INDICATING CIRCUIT FOR SWITCHING POWER SUPPLY AND USE METHOD THEREOF 审中-公开
公开(公告)号：US20190025363A1
公开(公告)日：2019-01-24
申请号：US16070291
申请日：2016-08-23
申请人： MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO., LTD.
发明人： Baojun WANG
IPC分类号： G01R31/02 , H05B33/08 , H01H9/16 , G05F1/565 , G01R31/00
摘要： An indicating circuit for a switching power supply is provided. An LED and a resistor are connected in series, and then are connected in parallel with a capacitor, and the parallel-connected circuit and a diode are connected in series in the same direction, and then are connected in parallel with an inductor to form the indicating circuit. The cathode of the indicating circuit is a terminal 1, and the anode of the indicating circuit is a terminal 2. A charging loop between a rectifying bridge and an electrolytic capacitor for filtering in a fly-back switching power supply is broken to insert the indicating circuit; when the electrolytic capacitor for filtering is normal, an excitation current of a main power stage basically does not appear in the inductor, and the LED does not emit light; when the ESR of the electrolytic capacitor rises greatly, the excitation current of the main power stage appears in the inductor; furthermore, when a switching transistor in the switching power supply is switched off, the excitation current flowing through the inductor may not be changed abruptly, and is freewheeled by the diode; after being filtered by the capacitor, the excitation current drives the LED to emit light; the LED may be a light emitter of a photocoupler to notify a user that: the ESR of the filter capacitor has risen and the switching power supply has a risk of failure, thereby avoiding aggravation of loss; and the indicating circuit has the characteristics of low cost and easiness in implementation.

2. 发明申请

US20190221373A1 RIPPLE CURRENT GENERATING CIRCUIT 审中-公开
公开(公告)号：US20190221373A1
公开(公告)日：2019-07-18
申请号：US16313011
申请日：2017-06-13
申请人： MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO., LTD.
发明人： Baojun WANG
IPC分类号： H01G9/14 , H01G9/28 , H01G9/008
摘要： Provided is a ripple current generating circuit, which comprises an indicating circuit based on an existing ripple current generating circuit. The indicating circuit comprises a resistor, a capacitor, a diode, and a light-emitting diode (LED). The indicating circuit is formed by connecting the LED and the diode that are reversely connected in parallel first to the resistor in parallel and then to the capacitor in series. The capacitor is low in capacity and serves to block direct current while allowing high frequency to pass. With increasing ESR of a tested capacitor, a high-frequency ripple voltage generated by a high-frequency exciting current across the ESR may rise accordingly. Since the capacitor is capable of allowing high frequency to pass, the LED will emit light when the high-frequency ripple voltage reaches a particular threshold that can be adjusted by adjusting the resistance of the resistor.

3. 发明申请

US20200083819A1 FLYBACK SWITCHING POWER SUPPLY 审中-公开
公开(公告)号：US20200083819A1
公开(公告)日：2020-03-12
申请号：US16468680
申请日：2018-02-02
申请人： MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO., LTD.
发明人： Baojun WANG
IPC分类号： H02M3/335 , H02M1/44
摘要： A flyback switch power supply connects NP1 heteronymous terminals in a transformer B to a power source, grounds second primary side winding NP2 heteronymous ends, and ensures that NP1 and NP2 are dual-wire parallel windings. Adding a capacitor C1, one end of C1 is connected to NP1 homonymous terminals, and the other end is connected to NP2 homonymous terminals. The secondary side winding uses a Q2 connection method that is the opposite to the prior art, and is controlled by a PWM signal controlled by another output voltage. The following effect is realized: when Q1 is connected, NP1 and NP2 are both excited, and there is artificial surplus energy; when Q1 is disconnected, the secondary side NS implements a rectified output voltage via Q2 on the basis of the output load requirements, and the leakage inductance and excess energy are non-destructively absorbed by NP2 via D1.

4. 发明申请

US20210351718A1 POWER SUPPLY CIRCUIT AND PHOTOVOLTAIC POWER GENERATION SYSTEM COMPRISING SAME 有权
公开(公告)号：US20210351718A1
公开(公告)日：2021-11-11
申请号：US17285100
申请日：2019-11-20
申请人： MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO., LTD.
发明人： Baojun WANG
IPC分类号： H02M7/538 , H02S40/32 , H02J3/12
摘要： A power supply circuit and a photovoltaic power generation system comprising same. The power supply circuit utilizes the condition that a voltage output by discharge of a capacitor is a direct-current voltage which decreases with time, a CCFL conversion circuit is connected behind the capacitor, the CCFL conversion circuit converts the input direct-current voltage which decreases which time into a sinusoidal alternating-current for output. Since the CCFL conversion circuit operates in an open-loop mode, a peak-to-peak value of the sinusoidal alternating-current output by the CCFL conversion circuit is in direct proportion to an operating voltage of the CCFL conversion circuit, the voltage decreases with time, that is, the peak-to-peak valve of the sinusoidal alternating-current output by the CCFL conversion circuit decreases with time, thus, an effective value of the sinusoidal alternating-current decreases with time, and an attenuated sinusoidal alternating-current voltage is obtained.

5. 发明申请

US20190029086A1 SWITCHING POWER SUPPLY HAVING ACTIVE POWER FACTOR CORRECTION 审中-公开
公开(公告)号：US20190029086A1
公开(公告)日：2019-01-24
申请号：US16070527
申请日：2016-08-29
申请人： MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO., LTD.
发明人： Baojun WANG
IPC分类号： H05B33/08 , H02M1/42 , G06F1/26 , H01F27/30
CPC分类号： H05B33/0815 , G06F1/263 , H01F27/30 , H02M1/32 , H02M1/4208 , H02M1/4225 , H02M1/4266 , H02M3/337 , H02M2001/0058 , H02M2001/0064 , H02M2001/007 , H05B33/0809 , Y02B70/126
摘要： A switch power supply having active power factor correction is provided, including a power factor correction (PFC) circuit, a filter circuit, a main power stage, a first capacitor (C1) and an indicating circuit. An alternating-current input (IN) is connected to the first capacitor through the PFC circuit and is connected to the filter circuit through the indicating circuit. The indicating circuit consists of a light emitting diode (LED) having unidirectional conductivity and an inductor (L); and the current direction of power supplied from the PFC circuit to the main power stage through the inductor is opposite to the conduction direction of the LED. The LED may also be a light emitter of a photocoupler. The filter circuit at least comprises an electrolytic capacitor (C2). When the electrolytic capacitor is normal, an exciting current of the main power stage basically does not appear in the inductor and the LED does not emit light. When the equivalent series resistance (ESR) of the electrolytic capacitor sharply rises, the exciting current appears in the inductor. When a power transistor in the main power stage is switched off, the exciting current in the inductor cannot be abruptly changed; instead, the exciting current passes through the LED for freewheeling and enables the LED to emit light, thereby notifying a user or a circuit that the electrolytic capacitor may have the risk of failure. The switch power supply has low additional cost and unchanged efficiency and is easy to implement.

6. 发明申请

US20190020270A1 DIRECT FILTERING TYPE SWITCHING POWER SUPPLY 审中-公开
公开(公告)号：US20190020270A1
公开(公告)日：2019-01-17
申请号：US16070776
申请日：2016-08-24
申请人： MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO., LTD.
发明人： Baojun WANG
IPC分类号： H02M1/42 , H02M3/335 , H02M7/217 , H05B33/08
摘要： A direct filtering type switching power supply is provided, for an occasion including pulsating direct current, including a filter circuit, a main power stage and an indicating circuit. A direct current input is connected to the filter circuit through the indicating circuit. The filter circuit and the main power stage are connected in parallel. The indicating circuit is formed by connecting a light emitting unit with an inductor in parallel, and make sure that the direction of the direct current input passing through the inductor is opposite to the conducting direction of the light emitting unit. The filter circuit at least includes an electrolytic capacitor. When the electrolytic capacitor is normal, an excitation current of a switching transistor in the main power stage basically does not appear in the inductor, and an LED in the light emitting unit does not emit light. When the Equivalent Series Resistance of the electrolytic capacitor rises greatly, the excitation current of the switching transistor appears in the inductor. Furthermore, when the switching transistor is switched off, the excitation current flowing through the inductor, which cannot be changed abruptly, freewheels through the LED, and drives the LED to emit light, so as to notify a user or a circuit that the electrolytic capacitor may have the risk of complete failure. The LED may also be a light emitter of a photocoupler. The switching power supply is low in cost, has unchanged efficiency and is easy to implement.

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