CN204376705U - A kind of dummy load control circuit for high frequency switch power - Google Patents
A kind of dummy load control circuit for high frequency switch power Download PDFInfo
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- CN204376705U CN204376705U CN201520029580.7U CN201520029580U CN204376705U CN 204376705 U CN204376705 U CN 204376705U CN 201520029580 U CN201520029580 U CN 201520029580U CN 204376705 U CN204376705 U CN 204376705U
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Abstract
The utility model relates to a kind of dummy load control circuit of high frequency switch power, comprise: at least one dummy load circuit being arranged at described high frequency switch power output, be connected to the sample circuit of described high frequency switch power output, and the control circuit be connected with described sample circuit and described dummy load circuit; The switching circuit for controlling described dummy resistance connection status that dummy load circuit described in each comprises dummy resistance and is connected with described control circuit.Implement the problem that when dummy load control circuit described in the utility model can solve below power supply zero load vibration and a certain underloading, duty-cycle loss is serious.
Description
Technical field
The utility model relates to electric power, communication, new energy field, more particularly, relates to a kind of high frequency switch power dummy load control circuit.
Background technology
Be widely used in electric power, communication, new energy field medium-high frequency Switching Power Supply, also more and more higher to the requirement of its technical performance, but the power supply topologies of application now easily vibrates under zero load or underloading voltage stabilizing situation, and the precision of voltage regulation does not reach the requirement of national standard.In this case will influential system rear class equipment life, easily there is accident.
Current solution 1 is that power output end directly adds that a resistance Rd makes it not be operated in zero load or light condition, and Rd is dummy load.When the shortcoming of this scheme is a unloaded any load fully loaded to output, dummy load is participated in directly and is caused power supply machine loss large, affects complete machine operating efficiency.
Solution 2 is that power output end adds the dummy resistance Rd that can automatically switch, the problem that when solving below power supply zero load vibration, a certain underloading, duty-cycle loss is serious, ensures power supply operational reliability, machine life and uses the equipment of this power supply, the useful life of Device and Meters; Solve and participate in dummy load when exporting fully loaded any load the problem causing power supply machine loss large directly more than a certain underloading, effectively raise more than a certain underloading of power supply to complete machine operating efficiency when exporting fully loaded any load.The shortcoming of this scheme is the requirement that can not meet wide-range voltage out-put supply.The dummy resistance being applicable to low output can produce very large loss under high output state, and the volume wanting the not damaged dummy load of resistance will be enough large, will have influence on efficiency and the volume of power supply like this.Be applicable to the dummy resistance problem that duty-cycle loss is serious when low output state load current can become very little can't resolve below power supply zero load vibration, a certain underloading of high output state.
Utility model content
The technical problems to be solved in the utility model is, the problem that when can't resolve below wide-range voltage out-put supply zero load vibration and a certain underloading for prior art above-mentioned, duty-cycle loss is serious.A kind of dummy load control circuit of high frequency switch power is provided.
The utility model solves the technical scheme that its technical problem adopts: the dummy load control circuit constructing a kind of high frequency switch power, it is characterized in that, comprise: at least one dummy load circuit being arranged at described high frequency switch power output, be connected to described high frequency switch power output and gather the sample circuit of sampled signal, and be connected with described sample circuit and described dummy load circuit and access according to described sampled signal or disconnect the control circuit of described dummy load circuit;
The switching circuit that dummy load circuit described in each comprises dummy resistance RD and accesses described high frequency switch power output with dummy resistance RD described in described control circuit connection control or disconnect from described high frequency switch power output.
Further, described dummy load circuit is multiple, and is parallel with one anotherly connected to described high frequency switch power output.
Further, described switching circuit comprises signal processing circuit and metal-oxide-semiconductor Q04; Described signal processing circuit comprises the first filter circuit, resistance R05, resistance R06, resistance R07 and NPN type triode Q01, NPN type triode Q02 and PNP type triode Q03; The base stage of described triode Q01 is connected with described first filter circuit, collector electrode is connected with one end of described resistance R05, emitter is connected with the collector electrode of described triode Q03, and the collector electrode of the emitter of described triode Q01 and described triode Q03 is all connected to the negative pole of described high frequency switch power output; The other end of described resistance R05 is connected to the base stage of described triode Q02 and described triode Q03; The emitter of described triode Q02 is connected with the emitter of described triode Q03; The collector electrode of described triode Q02 is connected to the negative pole of described high frequency switch power output by described resistance R06; One end of described resistance R07 is connected between the emitter of described triode Q02 and the emitter of described triode Q03, and the other end is connected to the base stage of described metal-oxide-semiconductor Q04; And the input of described signal processing circuit is connected with described control circuit;
The output voltage signal of described high frequency switch power and output current signal input to described control circuit by sample circuit by sampling; Described control circuit judges the operating state of current described high frequency switch power and sends and control signal to described signal processing circuit; When described control signal is high level signal, described high level signal flows to described triode Q01 by described first filter circuit, described triode Q01 conducting, described resistance R05 right-hand member voltage becomes low level, described triode Q02 turns off, described triode Q03 conducting, and now corresponding described resistance R07 right-hand member and the base voltage of described metal-oxide-semiconductor Q04 are low level, described metal-oxide-semiconductor Q04 turns off, and the output of described dummy resistance RD and described high frequency switch power disconnects and not working;
When described control signal is low level signal, described low level signal flows to described triode Q01 by described first filter circuit, described triode Q01 turns off, described resistance R05 right-hand member voltage becomes high level, described triode Q02 conducting, described triode Q03 turns off, and now corresponding described resistance R07 right-hand member and the base voltage of described metal-oxide-semiconductor Q04 are high level, described metal-oxide-semiconductor Q04 conducting, the output work of the described high frequency switch power of described dummy resistance RD parallel connection access.
Further, when the output voltage signal of described high frequency switch power and/or output current signal change, described control circuit sends corresponding control signal, and control switch circuit hierarchy switches the number N of the described dummy resistance of the described high frequency switch power output of access successively, and N is positive integer.
Further, described control circuit is dsp chip.
Further, described sample circuit comprises voltage sampling circuit and current sampling circuit.
Further, described current sampling circuit is connected with high frequency switch power output by shunt.
Further, described voltage sampling circuit comprises: sampling resistor R301, sampling resistor R302, balance resistance R303, balance resistance R304 and the first differential amplifier circuit, and described sampling resistor R301 and described sampling resistor R302 is connected on high frequency switch power output mutually; Described balance resistance R303 is connected on the in-phase input end of described sampling resistor R301 and described first differential amplifier circuit; Described balance resistance R304 is connected on the inverting input of described sampling resistor R302 and described first differential amplifier circuit; The output of described first differential amplifier circuit is connected to control circuit;
The voltage signal that high frequency switch power output exports delivers to described first differential amplifier circuit by after described sampling resistor R301 and described sampling resistor R302 dividing potential drop by described balance resistance R303 and described balance resistance R304, and described first differential amplifier circuit output voltage signal VOLT_DC is to control circuit.
Further, described current sampling circuit comprises: shunt, the second filter circuit, the 3rd filter circuit, the second differential amplifier circuit; Amplifying circuit; The input of described shunt is connected with the negative pole of high frequency switch power output, and the output of described shunt is connected with described second filter circuit and described 3rd filter circuit respectively; Described second differential amplifier circuit comprises balance resistance R203, balance resistance R204, resistance R206, resistance R207, electric capacity C203, electric capacity C204, electric capacity C205 and amplifier U2B; Described amplifying circuit comprises resistance R208, resistance R209, resistance R210, electric capacity C206 and amplifier U2A; Described balance resistance R203 is connected between the in-phase input end of described second filter circuit and described second differential amplifier circuit; Described balance resistance R204 is connected between the inverting input of described second filter circuit and described second differential amplifier circuit; The output of described second differential amplifier circuit is connected to the in-phase input end of described amplifying circuit by described resistance R208; The reverse input end of described amplifying circuit is connected to the negative pole of high frequency switch power output; The output of described amplifying circuit is connected to control circuit;
The current signal that high frequency switch power exports converts the voltage signal of millivolt level to through shunt, the voltage signal of described millivolt level by after described second filter circuit and described 3rd filter circuit two stage filter, then through described second differential amplifier circuit and described amplifying circuit two-stage amplifying circuit; Described amplifying circuit output voltage signal CURR_DC is to control circuit.
Implement a kind of dummy load control circuit for high frequency switch power of the present utility model, there is following beneficial effect: the utility model specifically adopts electric current and voltage sample circuit, judge the operating state that high frequency switch power is current, by the grading automatical dummy load circuit controlling access high frequency switch power output of control circuit, solve comprehensively high frequency switch power be operated in unloaded vibration or below a certain underloading time duty-cycle loss serious problem.Improve power supply and export in full voltage range the complete machine operating efficiency more than a certain underloading extremely exported when being fully loaded with any load.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the circuit block diagram of the overall plan of the utility model one embodiment;
Fig. 2 is the circuit diagram of the current sampling circuit of the utility model one embodiment;
Fig. 3 is the circuit diagram of the voltage sampling circuit of the utility model one embodiment;
Fig. 4 is the circuit diagram of a dummy load circuit of the utility model one embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage are clearly understood, below in conjunction with specific embodiment, and with reference to accompanying drawing, further describe the utility model.
The utility model provides a kind of dummy load control circuit of high frequency switch power, and Fig. 1 is the circuit block diagram of the overall plan of the utility model one embodiment.As shown in Figure 1, the dummy load control circuit of this high frequency switch power comprises: the dummy load circuit 31 parallel with one another being arranged at high frequency switch power output, dummy load circuit 32, ..., dummy load circuit 3N, be connected to the shunt 4 of high frequency switch power negative pole of output end, and the output current signal for gathering high frequency switch power after being connected to shunt 4 also exports the current sampling circuit 22 of corresponding CURR_DC signal, be connected to the voltage sampling circuit 21 also exporting corresponding VOLT_DC signal for the output voltage signal gathering high frequency switch power of high frequency switch power output, and with voltage sampling circuit 21, current sampling circuit 22 and each dummy load circuit be all connected for exporting control signal C_LOAD1 successively according to VOLT_DC signal and CURR_DC signal, C_LOAD2, ..., the control circuit of C_LOADN, in this specific embodiment, as shown in Figure 1, control circuit is dsp chip 11, wherein: N >=1, and be positive integer.
Fig. 2 is current sampling circuit figure embodiment illustrated in fig. 1.As shown in Figure 2, this current sampling circuit comprises: the second filter circuit 24 that resistance R201 and electric capacity C201 forms, the 3rd filter circuit 26, second differential amplifier circuit 28 that resistance R202 and electric capacity C202 forms, and amplifying circuit 30; Second differential amplifier circuit 28 comprises: balance resistance R203, balance resistance R204, resistance R206, resistance R207, electric capacity C203, electric capacity C204, electric capacity C205 and amplifier U2B; Amplifying circuit 30: comprise resistance R208, resistance R209, resistance R210, electric capacity C206 and amplifier U2A; Balance resistance R203 is connected between the second filter circuit 24 and the in-phase input end of the second differential amplifier circuit 28; Balance resistance R204 is connected between the second filter circuit 24 and the inverting input of the second differential amplifier circuit 28; The output of the second differential amplifier circuit 28 is connected to the in-phase input end of amplifying circuit 30 by resistance R208; The reverse input end of amplifying circuit 30 is connected to the negative pole of high frequency switch power output; The output of amplifying circuit 30 is connected to dsp chip 11.
The current signal exported from high frequency switch power to convert the voltage signal of millivolt level to through shunt 4, the voltage signal of millivolt level by after the second filter circuit 24 and the 3rd filter circuit 26 two stage filter, then through the second differential amplifier circuit 28 and amplifying circuit 30 two-stage amplifying circuit; Amplifying circuit 30 output voltage signal CURR_DC is to dsp chip.
Fig. 3 is voltage sampling circuit figure embodiment illustrated in fig. 1.As shown in Figure 3, this voltage sampling circuit comprises: sampling resistor R301, sampling resistor R302, balance resistance R303, balance resistance R304 and the first differential amplifier circuit 34, and sampling resistor R301 and sampling resistor R302 is connected on high frequency switch power output mutually; Balance resistance R303 is connected on the in-phase input end of sampling resistor R301 and the first differential amplifier circuit 34; Balance resistance R304 is connected on the inverting input of sampling resistor R302 and the first differential amplifier circuit 34; The output of the first differential amplifier circuit 34 is connected to dsp chip.
The voltage signal exported from high frequency switch power output delivers to the first differential amplifier circuit 34, first differential amplifier circuit 34 output voltage signal VOLT_DC to dsp chip by after sampling resistor R301 and R302 dividing potential drop by balance resistance R303 and R304.
Fig. 4 is a dummy load circuit figure embodiment illustrated in fig. 1.As shown in Figure 2, this dummy load circuit comprises dummy resistance RD, and the switching circuit 45 that the control dummy resistance RD be connected with dsp chip 11 accesses high frequency switch power output or disconnects from high frequency switch power output.Wherein, switching circuit 45 comprises signal processing circuit 44 and metal-oxide-semiconductor Q04; Signal processing circuit 44 comprises the first filter circuit 46, resistance R05, resistance R06, resistance R07 and NPN type triode Q01, NPN type triode Q02 and PNP type triode Q03; The base stage of triode Q01 is connected with the first filter circuit 46, collector electrode is connected with one end of resistance R05, emitter is connected with the collector electrode of triode Q03, and the collector electrode of the emitter of triode Q01 and triode Q03 is all connected to the negative pole of high frequency switch power output; The other end of resistance R05 is connected to the base stage of triode Q02 and triode Q03; The emitter of triode Q02 is connected with the emitter of triode Q03; The collector electrode of triode Q02 is connected to the negative pole of high frequency switch power output by resistance R06; One end of resistance R07 is connected between the emitter of triode Q02 and the emitter of triode Q03, and the other end is connected to the base stage of metal-oxide-semiconductor Q04; And the input of signal processing circuit is connected with dsp chip 11.
When the control signal that dsp chip 11 exports is high level signal, high level signal flows to triode Q01 by the first filter circuit 46, triode Q01 conducting, resistance R05 right-hand member voltage becomes low level, triode Q02 turns off, triode Q03 conducting, and now corresponding resistance R07 right-hand member and the base voltage of described metal-oxide-semiconductor Q04 are low level, metal-oxide-semiconductor Q04 turns off, and the output of dummy resistance RD and high frequency switch power disconnects and not working.
When the control signal that dsp chip 11 exports is low level signal, low level signal flows to triode Q01 by the first filter circuit 46, triode Q01 turns off, resistance R05 right-hand member voltage becomes high level, triode Q02 conducting, triode Q03 turns off, and now corresponding resistance R07 right-hand member and the base voltage of metal-oxide-semiconductor Q04 are high level, metal-oxide-semiconductor Q04 conducting, the output work of dummy resistance RD parallel connection access high frequency switch power.
Known in conjunction with above-mentioned Fig. 1 to Fig. 4, the specific works process of dummy load control circuit described in the utility model is: the output voltage signal of voltage sampling circuit 21 and current sampling circuit 22 Real-time Collection high frequency switch power and output current signal, the corresponding VOLT_DC signal that dsp chip 11 exports according to voltage sampling circuit 21 and current sampling circuit 22 and corresponding CURR_DC signal judge the operating state of high frequency switch power, when high frequency switch power zero load vibration or when seriously losing in the following duty ratio of a certain underloading, dsp chip 11 sends corresponding control signal, the switching circuit classification controlling dummy load circuit successively switches the number N of the dummy resistance of access in parallel or disconnection high frequency switch power output, make high frequency switch power zero load or keep steady operation below a certain underloading.Such as: the corresponding VOLT_DC signal that dsp chip 11 exports according to voltage sampling circuit 21 and current sampling circuit 22 and corresponding CURR_DC signal, when output control signal C_LOAD1 is low level, corresponding dummy load circuit 31 works, and the dummy resistance controlling dummy load circuit 31 correspondence is connected in parallel on high frequency switch power output; When the VOLT_DC signal of correspondence and/or the CURR_DC signal of correspondence change, if when the control signal C_LOAD2 correspondence that dsp chip 11 exports becomes low level, corresponding dummy load circuit 32 is then needed to work, the dummy resistance controlling dummy load circuit 32 is connected in parallel on high frequency switch power output, now, the dummy resistance output at high frequency switch power parallel with one another that the dummy resistance of dummy load circuit 31 correspondence is corresponding with dummy load circuit 32, ensures that high frequency switch power is unloaded or keep steady operation below a certain underloading; The rest may be inferred, if when the control signal C_LOADN correspondence that dsp chip 11 exports becomes low level, corresponding dummy load circuit 3N works, control the output that dummy resistance corresponding to dummy load circuit 3N is connected in parallel on high frequency switch power, now, N number of dummy resistance that N number of dummy load circuit is corresponding output at high frequency switch power parallel with one another, ensures that high frequency switch power is unloaded or keep steady operation below a certain underloading; Wherein, N >=1, and be positive integer.
If the corresponding VOLT_DC signal that dsp chip 11 exports according to voltage sampling circuit 21 and current sampling circuit 22 and corresponding CURR_DC signal, export control signal C_LOADN and become high level, then corresponding dummy load circuit controls dummy resistance corresponding to dummy load circuit 3N and departs from high frequency switch power output, when the VOLT_DC signal of correspondence and/or the CURR_DC signal of correspondence continue to change, if when the control signal C_LOADN-1 correspondence that dsp chip 11 exports becomes high level, then need corresponding dummy load circuit 3N-1 to control dummy resistance corresponding to dummy load circuit 3N-1 and depart from high frequency switch power output, now, the dummy resistance that dummy load circuit 3N is corresponding and dummy resistance corresponding to dummy load circuit 3N-1 all depart from the output of high frequency switch power, ensure that high frequency switch power is unloaded or keep steady operation below a certain underloading while, decrease the loss of power, the rest may be inferred, if when the control signal C_LOAD1 correspondence that dsp chip exports becomes high level, corresponding dummy load circuit 31 controls the output of the dummy resistance disengaging high frequency switch power of dummy load circuit 31 correspondence, now, N number of dummy resistance that N number of dummy load circuit is corresponding all departs from the output of high frequency switch power, effectively raises more than a certain underloading of power supply to the complete machine operating efficiency exported when being fully loaded with any load, wherein, N >=1, and be positive integer.
Claims (9)
1. the dummy load control circuit for high frequency switch power, it is characterized in that, comprise: at least one dummy load circuit being arranged at described high frequency switch power output, be connected to described high frequency switch power output and gather the sample circuit of sampled signal, and be connected with described sample circuit and described dummy load circuit and access according to described sampled signal or disconnect the control circuit of described dummy load circuit;
The switching circuit that dummy load circuit described in each comprises dummy resistance RD and accesses described high frequency switch power output with dummy resistance RD described in described control circuit connection control or disconnect from described high frequency switch power output.
2. dummy load control circuit according to claim 1, is characterized in that, described dummy load circuit is multiple, and is parallel with one anotherly connected to described high frequency switch power output.
3. dummy load control circuit according to claim 1, is characterized in that, described switching circuit comprises signal processing circuit and metal-oxide-semiconductor Q04; Described signal processing circuit comprises the first filter circuit, resistance R05, resistance R06, resistance R07 and NPN type triode Q01, NPN type triode Q02 and PNP type triode Q03; The base stage of described triode Q01 is connected with described first filter circuit, collector electrode is connected with one end of described resistance R05, emitter is connected with the collector electrode of described triode Q03, and the collector electrode of the emitter of described triode Q01 and described triode Q03 is all connected to the negative pole of described high frequency switch power output; The other end of described resistance R05 is connected to the base stage of described triode Q02 and described triode Q03; The emitter of described triode Q02 is connected with the emitter of described triode Q03; The collector electrode of described triode Q02 is connected to the negative pole of described high frequency switch power output by described resistance R06; One end of described resistance R07 is connected between the emitter of described triode Q02 and the emitter of described triode Q03, and the other end is connected to the base stage of described metal-oxide-semiconductor Q04; And the input of described signal processing circuit is connected with described control circuit;
The output voltage signal of described high frequency switch power and output current signal input to described control circuit by sample circuit by sampling; Described control circuit judges the operating state of current described high frequency switch power and sends and control signal to described signal processing circuit; When described control signal is high level signal, described high level signal flows to described triode Q01 by described first filter circuit, described triode Q01 conducting, described resistance R05 right-hand member voltage becomes low level, described triode Q02 turns off, described triode Q03 conducting, and now corresponding described resistance R07 right-hand member and the base voltage of described metal-oxide-semiconductor Q04 are low level, described metal-oxide-semiconductor Q04 turns off, and the output of described dummy resistance RD and described high frequency switch power disconnects and not working;
When described control signal is low level signal, described low level signal flows to described triode Q01 by described first filter circuit, described triode Q01 turns off, described resistance R05 right-hand member voltage becomes high level, described triode Q02 conducting, described triode Q03 turns off, and now corresponding described resistance R07 right-hand member and the base voltage of described metal-oxide-semiconductor Q04 are high level, described metal-oxide-semiconductor Q04 conducting, the output work of the described high frequency switch power of described dummy resistance RD parallel connection access.
4. dummy load control circuit according to claim 1, it is characterized in that, the output voltage signal of described high frequency switch power and/or output current signal change, described control circuit sends corresponding control signal C_LOADN, and the switching circuit classification controlling described dummy load circuit successively switches the number N of the described dummy resistance of the described high frequency switch power output of access in parallel; Wherein, N >=1, and be positive integer.
5. dummy load control circuit according to claim 1, is characterized in that, described control circuit is dsp chip.
6. dummy load control circuit according to claim 1, is characterized in that, described sample circuit comprises voltage sampling circuit and current sampling circuit.
7. dummy load control circuit according to claim 6, is characterized in that, described dummy load control circuit also comprises the shunt be connected between described current sampling circuit and high frequency switch power negative pole.
8. dummy load control circuit according to claim 6, it is characterized in that, described voltage sampling circuit comprises: sampling resistor R301, sampling resistor R302, balance resistance R303, balance resistance R304 and the first differential amplifier circuit, and described sampling resistor R301 and described sampling resistor R302 is connected on high frequency switch power output mutually; Described balance resistance R303 is connected on the in-phase input end of described sampling resistor R301 and described first differential amplifier circuit; Described balance resistance R304 is connected on the inverting input of described sampling resistor R302 and described first differential amplifier circuit; The output of described first differential amplifier circuit is connected to control circuit;
The voltage signal that high frequency switch power output exports delivers to described first differential amplifier circuit by after described sampling resistor R301 and described sampling resistor R302 dividing potential drop by described balance resistance R303 and described balance resistance R304, and described first differential amplifier circuit output voltage signal VOLT_DC is to control circuit.
9. dummy load control circuit according to claim 7, is characterized in that, described current sampling circuit comprises: the second filter circuit, the 3rd filter circuit, the second differential amplifier circuit; Amplifying circuit; The input of described shunt is connected with the negative pole of high frequency switch power output, and the output of described shunt is connected with described second filter circuit and described 3rd filter circuit respectively; Described second differential amplifier circuit comprises balance resistance R203, balance resistance R204, resistance R206, resistance R207, electric capacity C203, electric capacity C204, electric capacity C205 and amplifier U2B; Described amplifying circuit comprises resistance R208, resistance R209, resistance R210, electric capacity C206 and amplifier U2A; Described balance resistance R203 is connected between the in-phase input end of described second filter circuit and described second differential amplifier circuit; Described balance resistance R204 is connected between the inverting input of described second filter circuit and described second differential amplifier circuit; The output of described second differential amplifier circuit is connected to the in-phase input end of described amplifying circuit by described resistance R208; The reverse input end of described amplifying circuit is connected to the negative pole of high frequency switch power output; The output of described amplifying circuit is connected to control circuit;
The current signal that high frequency switch power exports converts the voltage signal of millivolt level to through shunt, the voltage signal of described millivolt level by after described second filter circuit and described 3rd filter circuit two stage filter, then through described second differential amplifier circuit and described amplifying circuit two-stage amplifying circuit; Described amplifying circuit output voltage signal CURR_DC is to control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520029580.7U CN204376705U (en) | 2015-01-15 | 2015-01-15 | A kind of dummy load control circuit for high frequency switch power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520029580.7U CN204376705U (en) | 2015-01-15 | 2015-01-15 | A kind of dummy load control circuit for high frequency switch power |
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| CN204376705U true CN204376705U (en) | 2015-06-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063611A (en) * | 2017-08-15 | 2018-05-22 | 江苏里尔电子科技有限公司 | A kind of circuit for controlling fictitious load break-make |
| CN109004921A (en) * | 2018-07-02 | 2018-12-14 | 蔡旺兵 | A kind of switching value element exempts to shield anti-interference output circuit |
| CN114567956A (en) * | 2022-03-09 | 2022-05-31 | 北京中瑞方兴科技有限公司 | Method and system for coping with light-load direct-current carrier signal distortion in direct-current lighting power supply |
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2015
- 2015-01-15 CN CN201520029580.7U patent/CN204376705U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063611A (en) * | 2017-08-15 | 2018-05-22 | 江苏里尔电子科技有限公司 | A kind of circuit for controlling fictitious load break-make |
| CN109004921A (en) * | 2018-07-02 | 2018-12-14 | 蔡旺兵 | A kind of switching value element exempts to shield anti-interference output circuit |
| CN114567956A (en) * | 2022-03-09 | 2022-05-31 | 北京中瑞方兴科技有限公司 | Method and system for coping with light-load direct-current carrier signal distortion in direct-current lighting power supply |
| CN114567956B (en) * | 2022-03-09 | 2024-02-20 | 北京中瑞方兴科技有限公司 | Method and system for coping with light-load direct-current carrier signal distortion in direct-current illumination power supply |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Luo Xiaoliang Inventor after: Liu Yongdong Inventor after: Li Zhigang Inventor after: Liu Yong Inventor before: Luo Xiaoliang Inventor before: Li Zhigang Inventor before: Liu Yong |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180327 Address after: 518057 Guangdong city of Shenzhen province Nanshan District high tech Industrial Park North Song Ping Road No. 3 aotexun Electric Power Mansion Co-patentee after: China Federation of electric power enterprises Patentee after: Shenzhen Auto Electric Power Plant Co., Ltd. Address before: 518057 Guangdong city of Shenzhen province Nanshan District Gao Xin Road No. 29 south building block two layer D Patentee before: Shenzhen Auto Electric Power Plant Co., Ltd. |