CN111785569B - Soft-start relay control circuit and charging circuit - Google Patents
Soft-start relay control circuit and charging circuit Download PDFInfo
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- CN111785569B CN111785569B CN202010606641.7A CN202010606641A CN111785569B CN 111785569 B CN111785569 B CN 111785569B CN 202010606641 A CN202010606641 A CN 202010606641A CN 111785569 B CN111785569 B CN 111785569B
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- 239000003990 capacitor Substances 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 5
- 230000001934 delay Effects 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 230000003139 buffering effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H47/18—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for introducing delay in the operation of the relay
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a soft-start relay control circuit and a charging circuit, comprising: the device comprises a first connecting end, a second connecting end, a pre-breakover circuit, a delay circuit and a relay; one end of the pre-breakover circuit is connected with the first connecting end, and the other end of the pre-breakover circuit is connected with the second connecting end; one end of the switch side of the relay is connected with the first connecting end, and the other end of the switch side of the relay is connected with the second connecting end; according to the invention, the relay control circuit is connected between the direct-current load of the charging circuit and the power supply end, the current is subjected to resistance buffering through the pre-breakover circuit, the direct-current load is subjected to delay charging through the delay circuit, when the voltage of the delay circuit reaches a set voltage, the relay coil is electrified to be connected with the normally open contact to be closed, and the current is completely added to the direct-current load, so that the effect of buffering soft start is achieved, the current is more stable, the direct-current load is protected, and the relay control circuit is simple and practical.
Description
Technical Field
The invention relates to the technical field of charging control, in particular to a soft-start relay control circuit and a charging circuit.
Background
In the rapid development process of the energy storage technology, the battery pack needs to be charged many times, when a generator set generates electricity, the electricity is converted into direct current through the rectifier cabinet, and then the direct current is added to the two ends of the battery pack to charge and store energy. When the direct current load is an energy storage battery pack, the output of the rectifier cabinet is directly connected to two ends of the battery pack, and the battery pack is damaged due to the impact of large current.
Disclosure of Invention
The present invention is directed to a soft-start relay control circuit and a charging circuit, which are used to solve one or more technical problems of the prior art and provide at least one of the advantages of the soft-start relay control circuit and the charging circuit.
The purpose of the invention is realized by adopting the following technical scheme: a soft-start relay control circuit comprising: the device comprises a first connecting end, a second connecting end, a pre-breakover circuit, a delay circuit and a relay; one end of the pre-breakover circuit is connected with the first connecting end, and the other end of the pre-breakover circuit is connected with the second connecting end; one end of the relay on the switch side is connected with the first connecting end, and the other end of the relay on the switch side is connected with the second connecting end; the pre-breakover circuit is used for generating a level signal for triggering the delay circuit, and the delay circuit responds to the level signal and delays the switch side of the control relay to be closed so as to conduct the first connecting end and the second connecting end.
Through connecting relay control circuit between direct current load and power end, carry out the resistance buffering to the power end electric current through switching on the circuit in advance, carry out the time delay through delay circuit and charge to direct current load, when delay circuit voltage reachd the settlement voltage, relay coil circular telegram switch-on normally open contact is closed, and the electric current adds direct current load completely, reaches the effect of buffering soft start, makes the electric current more steady, protection direct current load, and simple and practical.
As a further improvement of the above technical solution, the pre-turn-on circuit includes a first resistor, a seventh resistor, and a first capacitor; the first resistor is connected with the power supply anode at the first upper end, the lower end of the first resistor is respectively connected with the upper end of the seventh resistor and the upper end of the first capacitor, and the lower end of the first capacitor is respectively connected with the delay circuit and the power supply cathode; the lower end of the seventh resistor is connected with the delay circuit. The current is buffered in a resistance mode.
As a further improvement of the above technical solution, the delay circuit includes: the circuit comprises a photoelectric coupler, a first diode, a second capacitor, an eighth resistor, a ninth resistor, a tenth resistor, a first comparator, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, an electrolytic capacitor, a second diode, a second comparator, an eighteenth resistor, a fifth diode, a seventeenth resistor and an MOS (metal oxide semiconductor) tube; a first input end of the photoelectric coupler is respectively connected with the cathode of the first diode and the pre-conduction circuit, a second input end of the photoelectric coupler is respectively connected with the anode of the first diode and the pre-conduction circuit, a first output end of the photoelectric coupler is respectively connected with a first input end of the first comparator and the lower end of the tenth resistor, and a second output end of the photoelectric coupler is connected with a grounding end; a second input end of the first comparator is respectively connected with the upper end of the eleventh resistor and the upper end of the twelfth resistor, the lower end of the eleventh resistor is connected with a power supply end, and the lower end of the twelfth resistor is connected with a ground end; the upper end of the tenth resistor is connected with the lower end of the eighth resistor, the lower end of the ninth resistor and the lower end of the second capacitor respectively, the upper end of the eighth resistor is connected with a power supply end, and the upper end of the ninth resistor and the upper end of the second capacitor are connected with a ground end; the output end of the first comparator is connected with the left end of the thirteenth resistor, the right end of the thirteenth resistor is respectively connected with the second input end of the second comparator, the anode of the second diode, the lower end of the fourteenth resistor, the upper end of the fifteenth resistor and the anode of the electrolytic capacitor, the cathode of the electrolytic capacitor and the lower end of the fifteenth resistor are connected with a ground terminal, and the cathode of the second diode and the upper end of the fourteenth resistor are connected with a power supply end; a first input end of the second comparator is connected with a power supply end, an output end of the second comparator is respectively connected with a lower end of the eighteenth resistor, a cathode of the fifth diode, an upper end of the seventeenth resistor and a grid electrode of the MOS tube, the upper end of the eighteenth resistor is connected with the power supply end, and a source electrode of the MOS tube, an anode of the fifth diode and a lower end of the seventeenth resistor are connected with a grounding end; and the drain electrode of the MOS tube is connected with the relay. And realizing delayed charging.
As a further improvement of the above technical solution, the method further comprises: a third diode, a fourth diode, and a sixteenth resistor; the upper end of the sixteenth resistor is connected with the cathode of the third diode, the upper end of the relay and a power supply end respectively; the lower end of the sixteenth resistor is connected with the anode of the fourth diode, and the cathode of the fourth diode is respectively connected with the anode of the third diode and the lower end of the relay. The protection of the relay is realized.
As a further improvement of the above technical solution, the first comparator and the second comparator have models of LM 393.
As a further improvement of the technical scheme, the MOS transistor is 50N06 in model number.
As a further improvement of the technical scheme, the model of the photoelectric coupler is TLP 521-1.
A soft-start charging circuit, comprising: the relay comprises a rectifying circuit, an inductor, a third capacitor, a fuse, a direct current load and the relay control circuit; the upper end of the rectifying circuit is connected with the left end of the inductor, and the lower end of the rectifying circuit is respectively connected with the lower end of the third capacitor and the direct-current load; the right end of the inductor is connected with the upper end of the third capacitor and the left end of the fuse, the right end of the fuse is connected with the first connecting end of the relay control circuit, and the second connecting end of the relay control circuit is connected with the direct-current load.
As a further improvement of the above technical solution, the rectifying circuit includes a sixth diode, a seventh diode, an eighth diode, a ninth diode, a twelfth diode and an eleventh diode; an anode of the sixth diode, an anode of the seventh diode, an anode of the eighth diode, a cathode of the ninth diode, a cathode of the twelfth diode and a cathode of the eleventh diode are respectively connected with an alternating current power supply end; the negative electrode of the sixth diode is connected with the negative electrode of the seventh diode, the negative electrode of the eighth diode and the left end of the inductor; and the anode of the ninth diode is connected with the anode of the twelfth diode, the anode of the eleventh diode and the lower end of the third capacitor. So as to convert the alternating current into the direct current.
The invention has the beneficial effects that: through connecting relay control circuit between charging circuit direct current load and power end, carry out the resistance buffering to the electric current through switching on the circuit in advance, carry out the time delay through delay circuit and charge to direct current load, when delay circuit voltage reachd the settlement voltage, relay coil circular telegram switch-on normally open contact is closed, and the electric current adds direct current load completely, reaches the effect of buffering soft start, makes the electric current more steady, protection direct current load, and simple and practical.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a soft-start relay control circuit and a relay control circuit of a charging circuit according to the present invention;
FIG. 2 is a schematic diagram of a soft-start relay control circuit and a charging circuit according to the present invention;
the coordinate arrows in fig. 1 indicate up, down, left, and right, respectively.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and greater than, less than, more than, etc. are understood as excluding the essential numbers, and greater than, less than, etc. are understood as including the essential numbers. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present invention, unless otherwise specifically limited, terms such as set, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
Embodiment 1, referring to fig. 1, a soft-start relay control circuit includes: the relay comprises a first connecting end, a second connecting end, a pre-breakover circuit 110, a delay circuit 120 and a relay 130; one end of the pre-turn-on circuit 110 is connected with the first connection end, and the other end of the pre-turn-on circuit 110 is connected with the second connection end; one end of the switch side of the relay 130 is connected with the first connecting end, and the other end of the switch side of the relay 130 is connected with the second connecting end; the pre-turn-on circuit 110 is configured to generate a level signal for triggering the delay circuit 120, and the delay circuit 120 responds to the level signal and delays the switch side of the control relay 130 to be closed to turn on the first connection terminal and the second connection terminal.
The pre-turn-on circuit 110 comprises a first resistor R1, a seventh resistor R7 and a first capacitor C1; the second upper end of the first resistor R1 is connected to the positive electrode of the power supply, the lower end of the first resistor R1 is connected to the upper end of the seventh resistor R7 and the upper end of the first capacitor C1, and the lower end of the first capacitor C1 is connected to the delay circuit 120 and the negative electrode of the power supply; the lower end of the seventh resistor R7 is connected to the delay circuit 120.
The delay circuit 120 includes: the photoelectric coupler OPT1, a first diode D1, a second capacitor C2, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a first comparator U1A, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, an electrolytic capacitor E1, a second diode D2, a second comparator U1B, an eighteenth resistor R18, a fifth diode D5, a seventeenth resistor R17 and a MOS transistor Q1; a first input end of the photocoupler OPT1 is respectively connected with a negative electrode of the first diode D1 and the pre-conducting circuit 110, a second input end of the photocoupler OPT1 is respectively connected with a positive electrode of the first diode D1 and the pre-conducting circuit 110, a first output end of the photocoupler OPT1 is respectively connected with a first input end of the first comparator U1A and a lower end of the tenth resistor R10, and a second output end of the photocoupler OPT1 is connected with a ground end; a second input end of the first comparator U1A is connected to an upper end of the eleventh resistor R11 and an upper end of a twelfth resistor R12, respectively, a lower end of the eleventh resistor R11 is connected to a power supply terminal, and a lower end of the twelfth resistor R12 is connected to a ground terminal; the upper end of the tenth resistor R10 is connected to the lower end of the eighth resistor R8, the lower end of the ninth resistor R9 and the lower end of the second capacitor C2, respectively, the upper end of the eighth resistor R8 is connected to a power supply terminal, and the upper end of the ninth resistor R9 and the upper end of the second capacitor C2 are connected to a ground terminal; the output end of the first comparator U1A is connected to the left end of the thirteenth resistor R13, the right end of the thirteenth resistor R13 is connected to the second input end of the second comparator U1B, the anode of the second diode D2, the lower end of the fourteenth resistor R14, the upper end of the fifteenth resistor R15 and the anode of the electrolytic capacitor E1, the cathode of the electrolytic capacitor E1 and the lower end of the fifteenth resistor R15 are connected to the ground, and the cathode of the second diode D2 and the upper end of the fourteenth resistor R14 are connected to the power supply terminal; a first input end of the second comparator U1B is connected to a power supply terminal, an output end of the second comparator U1B is connected to a lower end of the eighteenth resistor R18, a cathode of the fifth diode D5, an upper end of the seventeenth resistor R17 and a gate of the MOS transistor Q1, an upper end of the eighteenth resistor R18 is connected to the power supply terminal, and a source of the MOS transistor Q1, an anode of the fifth diode D5 and a lower end of the seventeenth resistor R17 are connected to a ground terminal; the drain electrode of the MOS transistor Q1 is connected with the relay 130.
Preferably, the relay control circuit further includes: a third diode D3, a fourth diode D4, and a sixteenth resistor R16; the upper end of the sixteenth resistor R16 is connected to the cathode of the third diode D3, the upper end of the relay 130 and a power supply terminal, respectively; the lower end of the sixteenth resistor R16 is connected to the anode of the fourth diode D4, and the cathodes of the fourth diode D4 are connected to the anode of the third diode D3 and the lower end of the relay 130, respectively.
Referring to fig. 2, a soft-start charging circuit includes: the relay control circuit 100 comprises a rectifying circuit, an inductor L1, a third capacitor C3, a fuse, a direct current load and the relay control circuit 100; the upper end of the rectifying circuit is connected with the left end of the inductor L1, and the lower end of the rectifying circuit is respectively connected with the lower end of the third capacitor C3 and the direct-current load; the right end of the inductor L1 is connected to the upper end of the third capacitor C3 and the left end of the fuse, the right end of the fuse is connected to the first connection end of the relay 130 control circuit, and the second connection end of the relay 130 control circuit is connected to the dc load.
The rectifying circuit comprises a sixth diode D6, a seventh diode D7, an eighth diode D8, a ninth diode D9, a twelfth diode D10 and an eleventh diode D11; the anode of the sixth diode D6, the anode of the seventh diode D7, the anode of the eighth diode D8, the cathode of the ninth diode D9, the cathode of the twelfth diode D10 and the cathode of the eleventh diode D11 are respectively connected to the ac power supply terminal power generation set 200; the cathode of the sixth diode D6 is connected to the cathode of the seventh diode D7, the cathode of the eighth diode D8 and the left end of the inductor L1; the anode of the ninth diode D9 is connected to the anode of the twelfth diode D10, the anode of the eleventh diode D11 and the lower end of the third capacitor C3.
Through increasing relay control circuit 100 at battery package charging circuit, the electric current is earlier through the resistance buffering of switching on circuit 110 in advance, optoelectronic coupler OPT1 among the delay circuit 120 switches on, through first comparator, output high level, charge electrolytic capacitor E1, electrolytic capacitor E1 voltage is higher than when setting for voltage (12V), the second comparator outputs high level, make MOS pipe Q1 switch on, relay 130 coil circular telegram switch-on normally open contact is closed, rectifier circuit resistance short circuit, the electric current adds the load completely, the electric capacity reaches 12V' S time control at 30S, whole process delay 30S, reach the effect of buffering soft start, make the electric current more steady, protect the load, and simple and practical.
Preferably, the first comparator U1A and the second comparator U1B are LM393 in model number.
Preferably, the MOS transistor Q1 is 50N06 in model number.
Preferably, the opto-coupler OPT1 is model TLP 521-1.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (7)
1. A soft-start relay control circuit is characterized in that: the method comprises the following steps: the device comprises a first connecting end, a second connecting end, a pre-breakover circuit, a delay circuit and a relay;
one end of the pre-breakover circuit is connected with the first connecting end, and the other end of the pre-breakover circuit is connected with the second connecting end;
one end of the relay on the switch side is connected with the first connecting end, and the other end of the relay on the switch side is connected with the second connecting end;
the pre-breakover circuit is used for generating a level signal for triggering the delay circuit, and the delay circuit responds to the level signal and delays the switch side of the control relay to be closed so as to break over the first connecting end and the second connecting end;
the pre-conducting circuit comprises a first resistor, a seventh resistor and a first capacitor; the upper end of the first resistor is connected with a power supply anode, the lower end of the first resistor is respectively connected with the upper end of the seventh resistor and the upper end of the first capacitor, and the lower end of the first capacitor is respectively connected with the delay circuit and the power supply cathode; the lower end of the seventh resistor is connected with the delay circuit;
the delay circuit includes: the circuit comprises a photoelectric coupler, a first diode, a second capacitor, an eighth resistor, a ninth resistor, a tenth resistor, a first comparator, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, an electrolytic capacitor, a second diode, a second comparator, an eighteenth resistor, a fifth diode, a seventeenth resistor and an MOS (metal oxide semiconductor) tube; a first input end of the photoelectric coupler is respectively connected with the cathode of the first diode and the pre-conduction circuit, a second input end of the photoelectric coupler is respectively connected with the anode of the first diode and the pre-conduction circuit, a first output end of the photoelectric coupler is respectively connected with a first input end of the first comparator and the lower end of the tenth resistor, and a second output end of the photoelectric coupler is connected with a ground end; a second input end of the first comparator is respectively connected with an upper end of the eleventh resistor and an upper end of the twelfth resistor, a lower end of the eleventh resistor is connected with a power supply end, and a lower end of the twelfth resistor is connected with a ground end; the upper end of the tenth resistor is connected with the lower end of the eighth resistor, the lower end of the ninth resistor and the lower end of the second capacitor respectively, the upper end of the eighth resistor is connected with a power supply end, and the upper end of the ninth resistor and the upper end of the second capacitor are connected with a ground end; the output end of the first comparator is connected with the left end of the thirteenth resistor, the right end of the thirteenth resistor is respectively connected with the second input end of the second comparator, the anode of the second diode, the lower end of the fourteenth resistor, the upper end of the fifteenth resistor and the anode of the electrolytic capacitor, the cathode of the electrolytic capacitor and the lower end of the fifteenth resistor are connected with a ground terminal, and the cathode of the second diode and the upper end of the fourteenth resistor are connected with a power supply end; a first input end of the second comparator is connected with a power supply end, an output end of the second comparator is respectively connected with the lower end of the eighteenth resistor, the cathode of the fifth diode, the upper end of the seventeenth resistor and the grid electrode of the MOS tube, the upper end of the eighteenth resistor is connected with the power supply end, and the source electrode of the MOS tube, the anode of the fifth diode and the lower end of the seventeenth resistor are connected with a ground end; and the drain electrode of the MOS tube is connected with the relay.
2. The soft-start relay control circuit of claim 1, wherein: further comprising: a third diode, a fourth diode, and a sixteenth resistor; the upper end of the sixteenth resistor is connected with the cathode of the third diode, the upper end of the relay and a power supply end respectively; the lower end of the sixteenth resistor is connected with the anode of the fourth diode, and the cathode of the fourth diode is respectively connected with the anode of the third diode and the lower end of the relay.
3. The soft-start relay control circuit of claim 1, wherein: the first comparator and the second comparator are of type LM 393.
4. A soft-start relay control circuit according to claim 1, wherein: the MOS transistor is 50N06 in model number.
5. A soft-start relay control circuit according to claim 1, wherein: the photoelectric coupler is TLP 521-1.
6. A soft-start charging circuit, comprising: the method comprises the following steps: rectifier circuit, inductor, third capacitor, fuse, dc load and a soft-start relay control circuit as claimed in any one of claims 1 to 5; the upper end of the rectifying circuit is connected with the left end of the inductor, and the lower end of the rectifying circuit is respectively connected with the lower end of the third capacitor and the direct-current load; the right end of the inductor is connected with the upper end of the third capacitor and the left end of the fuse, the right end of the fuse is connected with the first connecting end of the relay control circuit, and the second connecting end of the relay control circuit is connected with the direct-current load.
7. A soft-start charging circuit as claimed in claim 6, wherein: the rectifying circuit comprises a sixth diode, a seventh diode, an eighth diode, a ninth diode, a twelfth diode and an eleventh diode; an anode of the sixth diode, an anode of the seventh diode, an anode of the eighth diode, a cathode of the ninth diode, a cathode of the twelfth diode and a cathode of the eleventh diode are respectively connected with an alternating current power supply end; the negative electrode of the sixth diode is connected with the negative electrode of the seventh diode, the negative electrode of the eighth diode and the left end of the inductor; and the anode of the ninth diode is connected with the anode of the twelfth diode, the anode of the eleventh diode and the lower end of the third capacitor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010606641.7A CN111785569B (en) | 2020-06-29 | 2020-06-29 | Soft-start relay control circuit and charging circuit |
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| CN202010606641.7A CN111785569B (en) | 2020-06-29 | 2020-06-29 | Soft-start relay control circuit and charging circuit |
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| CN111785569B true CN111785569B (en) | 2022-07-15 |
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| CN108631267B (en) * | 2018-04-27 | 2019-08-13 | 保定博为泓翔电气有限公司 | A kind of motor power with soft start and overcurrent protection function |
| CN209232126U (en) * | 2018-11-22 | 2019-08-09 | 天津七六四通信导航技术有限公司 | Multifunctional remote-control interface circuit protective device |
| CN109510515A (en) * | 2019-01-25 | 2019-03-22 | 成都广通汽车有限公司 | A kind of timesharing starting module |
| CN110467073A (en) * | 2019-08-22 | 2019-11-19 | 广东职业技术学院 | A kind of mine hoist non-muscular energy braking system and its control method |
| CN214848374U (en) * | 2021-01-12 | 2021-11-23 | 中山大洋电机股份有限公司 | Intelligent relay safety switch circuit and BLDC motor controller |
| CN215377332U (en) * | 2021-03-22 | 2021-12-31 | 广东积微科技有限公司 | Pre-charging control circuit |
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| CN103427618A (en) * | 2013-06-24 | 2013-12-04 | 深圳市英威腾电气股份有限公司 | Soft start control circuit |
| CN103904874A (en) * | 2014-03-11 | 2014-07-02 | 许继电气股份有限公司 | Delay soft start circuit used for BOOST-PFC |
| CN105553245A (en) * | 2015-09-10 | 2016-05-04 | 许继电源有限公司 | Soft start circuit |
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