CN104065309A - Fan drive circuit - Google Patents
Fan drive circuit Download PDFInfo
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- CN104065309A CN104065309A CN201310084345.5A CN201310084345A CN104065309A CN 104065309 A CN104065309 A CN 104065309A CN 201310084345 A CN201310084345 A CN 201310084345A CN 104065309 A CN104065309 A CN 104065309A
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- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 74
- 230000003111 delayed effect Effects 0.000 claims description 12
- 230000005669 field effect Effects 0.000 claims description 12
- 229910052755 nonmetal Inorganic materials 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 abstract description 18
- 101150013030 FAN1 gene Proteins 0.000 description 17
- 230000000875 corresponding effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 1
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Abstract
The invention provides a fan drive circuit which is used for driving a first fan and a second fan. The first fan and the second fan are connected in parallel and are respectively connected with the positive electrode of a direct current power supply. The fan drive circuit comprises a pulse width modulation signal generating module, a phase locking and delay module, a pulse wave output first comparator and a first capacitor. One end of the pulse width modulation signal generating module is connected with an external power supply, and the other end is connected with the first fan. The phase locking and delay module and the pulse width modulation signal generating module are connected. The pulse wave output first comparator comprises a first input end, a second input end and an output end. The first capacitor is connected between the positive electrode of the direct current power supply and the ground. The fan drive circuit pre-drives the fan of the next stage by using Lenz current which is generated by an inductor in the fan of the previous stage in the pulse width modulation signal generating module in a non working cycle, which saves the fan drive power consumption and reduces noise.
Description
Technical field
The present invention relates to a kind of fan drive circuit, relate in particular to a kind of drive circuit that reduces fans drive energy consumption.
Background technology
The driver circuit of conventional fan, is that a kind of continuation consumes the uneconomical circuit design that the energy rotates with drive fan, and also, because circuit need to constantly provide the energy to carry out drive fan, correlated parts will continue to produce power consumption consumption, causes shortening of life-span.If rotation speed of the fan is very high, overwhelming majority when consumed power will occupy system underloading, just so can make system cannot reach the requirement of laws and regulations of energy.
Summary of the invention
The invention provides a kind of fan drive circuit, utilize the distracted primary current that in previous stage fan, inductance produces to drive in advance rear one-level fan, the energy consumption while having reduced fans drive and noise.
The invention provides a kind of fan drive circuit, for driving the first fan and the second fan, the first fan is in parallel with the second fan and be connected with the positive pole of DC power supply respectively.Fan drive circuit comprises pulse width modulating signal generation module, phase-locked and phase place is delayed module, pulse wave is exported the first comparator and the first electric capacity.One end of pulse width modulating signal generation module is connected with external power source, and the other end is connected with the first fan, for generation of pulse wave, drives the first fan and the second fan.Phase-lockedly delay module with phase place and be connected with pulse width modulating signal generation module, for transmitted bandwidth modulation signals, to pulse width modulating signal generation module, make pulse width modulating signal generation module produce the poor pulse wave of out of phase.Pulse wave is exported the first comparator and is comprised first input end, the second input and output, first input end and phase-locked and phase place are delayed module and are connected to obtain and phase-lockedly delay with phase place the pulse width modulating signal that module produces, the second input input reference power source, output is connected between the second fan and ground, for export pulse pulse wave to the second fan after receiving pulse width modulating signal according to pulse width modulating signal generation module.The first electric capacity is connected between the positive pole and ground of DC power supply.Wherein, fan drive circuit utilizes the inductance in the first fan in the inoperative cycle, to produce distracted primary current at pulse width modulating signal generation module, and distracted primary current is stored in the first electric capacity, and utilizes distracted primary current to drive in advance the second fan.
Preferably, pulse width modulating signal generation module comprises the second electric capacity and voltage comparator, voltage comparator comprises first input end, the second input and output, the first input end of voltage comparator is connected with external power source, the second input of voltage comparator is Voltage Reference end, and the output of voltage comparator is connected with the first fan; Wherein, when the external voltage source of voltage comparator voltage is greater than the reference voltage of voltage comparator, voltage comparator output output high level signal is to pulse width modulating signal generation module, make pulse width modulating signal generation module export positive pulse wave, make pulse width modulating signal generation module in the work period; When the external voltage source of voltage comparator is less than the reference voltage of voltage comparator, the output output low level signal of voltage comparator, to pulse width modulating signal generation module, makes pulse width modulating signal generation module in the inoperative cycle.
Preferably, phase-lockedly delay module with phase place and be connected with pulse width modulating signal generation module, the phase-locked pulse width modulating signal that is 180 for generation of phase difference with phase delay module is to pulse width modulating signal generation module.
Preferably, fan drive circuit also comprises the 3rd electric capacity and resistance, the 3rd electric capacity is connected to the ground, resistance is connected with the second electric capacity, the 3rd electric capacity and resistance form a filter circuit, for the triangular wave that pulse width modulating signal generation module is produced, convert square wave to for driving the first fan and the second fan.
Preferably, fan drive circuit also comprises that three fan and pulse wave export the second comparator, and three fan is in parallel with the first fan and the second fan, and is connected with DC power anode respectively.Pulse wave is exported the second comparator and is comprised first input end, the second input and output, the first input end that pulse wave is exported the second comparator is delayed module with phase place and is connected with phase-locked, the second input that pulse wave is exported the second comparator is connected with pulse width modulating signal generation module, the output that pulse wave is exported the second comparator is connected with three fan, for exporting pulse wave to three fan.
Preferably, phase-lockedly delay module with phase place and be connected with pulse width modulating signal generation module, the phase-locked pulse width modulating signal that is 120 for generation of phase difference with phase delay module is to pulse width modulating signal generation module.
Preferably, fan drive circuit also comprises the first switch, second switch and the 3rd switch, the first electrode of the first switch, second switch and the 3rd switch is connected with corresponding the first fan, the second fan and three fan respectively, the second electrode of the first switch, second switch and the 3rd switch is connected with earth terminal respectively, and the control utmost point of the first switch, second switch and the 3rd switch is exported the first comparator and pulse wave with corresponding voltage comparator, pulse wave respectively and exported the output of the second comparator and be connected.When pulse width modulating signal generation module is exported positive pulse wave, the control of the first switch is high level very, the first switch conduction, and the first fan is started working.When pulse width modulating signal generation module quits work, the control of the first switch is low level very, the first fan quits work, and the inductance in the first fan utilizes the out-of-work time of pulse width modulating signal generation module to produce distracted primary current, and produced distracted primary current is stored in the first electric capacity for driving in advance the second fan.
Preferably, the first switch, second switch and the 3rd switch are the nonmetal field effect transistor of N-type, the first electrode of the first switch, second switch and the 3rd switch is the drain electrode of the nonmetal field effect transistor of N-type, the second electrode of the first switch, second switch and the 3rd switch is the source electrode of the nonmetal field effect transistor of N-type, and the control of driving the first switch, second switch and the 3rd switch is the grid of the nonmetal field effect transistor of N-type very.
One-level fan after the distracted primary current that fan drive circuit of the present invention utilizes the inductance in previous stage fan to produce in the inoperative cycle at pulse width modulating signal generation module drives in advance, has saved fans drive power consumption and has reduced noise.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of fan drive circuit the first execution mode of the present invention.
Fig. 2 is the circuit diagram of fan drive circuit the second execution mode of the present invention.
Fig. 3 is the circuit diagram of fan drive circuit of the present invention the 3rd execution mode.
Main element symbol description
Fan drive circuit 100
Pulse width modulating signal generation module 101
Phase-locked and phase place is delayed module 103
Voltage comparator U1
Pulse wave is exported the first comparator U2
Pulse wave is exported the second comparator U3
The first capacitor C 1
The second capacitor C 2
The 3rd capacitor C 3
Resistance R 1
DC power supply DC
The first K switch 1
Second switch K2
The 3rd K switch 3
The first fan Fan1
The second fan Fan2
Three fan Fan3
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Referring to Fig. 1, is the physical circuit figure of the first embodiment of fan drive circuit 100 of the present invention.
In the present embodiment, fan drive circuit 100 comprises the first fan Fan1 and the second fan Fan2.The first fan Fan1 is in parallel with the second fan Fan2 and be connected with the positive pole of DC power supply DC respectively.Fan drive circuit 100 comprises pulse width modulating signal generation module 101, phase-locked and phase place is delayed module 103, pulse wave is exported the first comparator U2 and the first capacitor C 1.Wherein, fan drive circuit 100 utilizes the inductance in the first fan Fan1 in the inoperative cycle, to produce distracted primary current at pulse width modulating signal generation module 101, and distracted primary current is stored in the first capacitor C 1, and utilizes distracted primary current to drive in advance the second fan Fan2.
One end of pulse width modulating signal generation module 101 is connected with external power source, and the other end is connected with the first fan Fan1, for generation of pulse wave, drives the first fan Fan1 and the second fan Fan2.
In the present embodiment, pulse width modulating signal generation module 101 comprises the second capacitor C 2 and voltage comparator U1, voltage comparator U1 comprises first input end, the second input and output, the first input end of voltage comparator U1 is connected with external power source, the second input of voltage comparator is Voltage Reference end, and the output of voltage comparator U1 is connected with the first fan Fan1; Wherein, when the external voltage source of voltage comparator U1 voltage is greater than the reference voltage of voltage comparator U1, voltage comparator U1 output output high level signal is to pulse width modulating signal generation module 101, make pulse width modulating signal generation module 101 in the work period, make the positive pulse wave of pulse width modulating signal generation module 101 output; When the external voltage source of voltage comparator U1 is less than the reference voltage of voltage comparator U1, the output output low level signal of voltage comparator U1, to pulse width modulating signal generation module 101, makes pulse width modulating signal generation module 101 in the inoperative cycle.Phase-lockedly delay module 103 with phase place and be connected with pulse width modulating signal generation module 101, for transmitted bandwidth modulation signals, to pulse width modulating signal generation module 101, make pulse width modulating signal generation module 101 produce the poor pulse wave of out of phase.
Phase-locked and phase place are delayed pulse width modulating signal that module 103 is 180 for generation of phase difference to pulse width modulating signal module 101, make pulse width modulating signal generation module 101 produce pulse waves to drive the second fan Fan2.
Pulse wave is exported the first comparator U2 and is comprised first input end, the second input and output, first input end and phase-locked and phase place are delayed module 103 and are connected to obtain and phase-lockedly delay with phase place the pulse width modulating signal that module 103 produces, the second input input reference power source, output is connected between the second fan and ground, for export pulse pulse wave to the second fan after receiving pulse width modulating signal according to pulse width modulating signal generation module.
The first capacitor C 1 is connected between the positive pole and ground of DC power supply DC, for stored current in order to drive in advance the second fan Fan2.Fan drive circuit 100 utilizes the inductance in the first fan Fan1 in the inoperative cycle, to produce distracted primary current at pulse width modulating signal generation module 101, and distracted primary current is stored in the first capacitor C 1, and utilizes distracted primary current to drive in advance the second fan Fan2.As front, phase-locked and phase place is delayed module 103 can produce the phase differences that have 180 degree, and namely pulse width modulating signal generation module 101 can send positive pulse wave between 0 to 180 degree phase place, and the first fan Fan1 is also in running order.After a 180 degree phase place, pulse width modulating signal generation module 101 can quit work, and now the inductance in the first fan Fan1 can produce distracted primary current, and the distracted primary current producing is stored in the first capacitor C 1.When the first fan Fan1 quits work, the distracted primary current being stored in the first capacitor C 1 can preliminary election drive the second fan Fan2.Phase-locked and phase place delay module 103 180 degree to again can output pulse width modulation signal between 360 degree phase places to pulse width modulating signal generation module 101, pulse width modulating signal generation module 101 can give the second fan Fan2 to drive the second fan by the positive pulse wave of output.The periodic duty like this of whole fan drive circuit 100, the energy consumption while having saved fans drive and reduced noise.
In the present embodiment, fan drive circuit 100 also comprises the 3rd capacitor C 3 and resistance R 1, the 3rd capacitor C 3 is connected with earth terminal, resistance R 1 is connected with the second capacitor C 2, the 3rd capacitor C 3 forms a filter circuit with resistance R 1, for the triangular wave that pulse width modulating signal generation module 101 is produced, converts square wave to drive the first fan Fan1 and the second fan Fan2.
In the present embodiment, fan drive circuit 100 can be applicable to desktop computer (DT), server (Server), emergency power supply (EPS) and various switch (LAN switch) product.
Fig. 2 is the second execution mode of fan drive circuit 100 of the present invention.
In the present embodiment, compare with the embodiment shown in Fig. 1, fan drive circuit 100 also comprises that three fan Fan3 and pulse wave export the second comparator U2, wherein, three fan Fan3 is in parallel with the first fan Fan1 and the second fan Fan2, and is connected with DC power supply DC is anodal respectively.
In the present embodiment, pulse wave is exported the second comparator U2 and is comprised first input end, the second input and output, the first input end that pulse wave is exported the second comparator U2 is delayed module 103 with phase place and is connected with phase-locked, the second input that pulse wave is exported the second comparator U2 is connected with pulse width modulating signal generation module 103, the output that pulse wave is exported the second comparator U2 is connected with three fan Fan3, for exporting pulse wave to described three fan Fan3.
In the present embodiment, phase-lockedly delay module 103 with phase place and be connected with pulse width modulating signal generation module 101, the phase-locked pulse width modulating signal that is 120 for generation of phase difference with phase delay module 103 is to pulse width modulating signal generation module 101.
Fig. 3 is the 3rd execution mode of fan drive circuit 100 of the present invention.
In the present embodiment, compare with the embodiment shown in Fig. 2, fan drive circuit 100 also comprises the first K switch 1, second switch K2 and the 3rd K switch 3.The first electrode of the first K switch 1, second switch K2 and the 3rd K switch 3 is connected with corresponding the first fan Fan1, the second fan Fan2 and three fan Fan3 respectively.The second electrode of the first K switch 1, second switch K2 and the 3rd K switch 3 is connected with earth terminal respectively, and the control utmost point of the first K switch 1, second switch K2 and the 3rd K switch 3 is exported the first comparator U2 and pulse wave with corresponding voltage comparator U1, pulse wave respectively and exported the output of the second comparator U2 and be connected.
The first K switch 1, second switch K2 and the 3rd K switch 3 are the nonmetal field effect transistor of N-type, the first electrode of the first K switch 1, second switch K2 and the 3rd K switch 3 is the drain electrode of the nonmetal field effect transistor of N-type, the second electrode of the first K switch 1, second switch K2 and the 3rd K switch 3 is the source electrode of the nonmetal field effect transistor of N-type, and the control of opening the first K switch 1, second switch K2 and the 3rd K switch 3 is the grid of the nonmetal field effect transistor of N-type very.
When the positive pulse wave of pulse width modulating signal generation module 101 output, the control of the first K switch 1 is high level very, the first K switch 1 conducting, and described the first fan Fan1 starts working.
When pulse width modulating signal generation module 101 quits work, the control of the first K switch 1 is low level very, the first fan Fan1 quits work, and the inductance in the first fan Fan1 utilizes the out-of-work time of pulse width modulating signal generation module 103 to produce distracted primary current, and produced distracted primary current is stored in the first capacitor C 1 for driving in advance the second fan Fan2.
When the second fan Fan2 is after work a period of time,, after 120 phase differences, pulse width modulating signal generation module 101 will quit work, and the control of second switch K2 is low level very, and the second fan Fan2 also quits work.Inductance in the second fan Fan2 utilizes the out-of-work time of pulse width modulating signal generation module 103 to produce distracted primary current, and produced distracted primary current is stored in the first capacitor C 1 for driving in advance three fan Fan3.Also so follow.
In addition, in other embodiments, the fan in fan drive circuit can also be 4,5 to n.
Thereby, one-level fan after the distracted primary current that fan drive circuit in the various execution modes of the present invention utilizes the inductance in previous stage fan to produce in the inoperative cycle at pulse width modulating signal generation module 101 drives in advance, has saved fans drive power consumption and has reduced noise.
Claims (8)
1. a fan drive circuit, for driving the first fan and the second fan, described the first fan is in parallel with the second fan and be connected with the positive pole of DC power supply respectively, it is characterized in that, and described fan drive circuit comprises:
Pulse width modulating signal generation module, one end is connected with external power source, and one end is connected with described the first fan and described the second fan, for generation of pulse wave, drives described the first fan and described the second fan;
Phase-locked and phase place is delayed module, be connected with described pulse width modulating signal generation module, for transmitted bandwidth modulation signals, give described pulse width modulating signal generation module, make described pulse width modulating signal generation module produce the poor pulse wave of out of phase;
Pulse wave is exported the first comparator, comprise first input end, the second input and output, first input end and described phase-locked and phase place are delayed module and are connected to obtain and describedly phase-lockedly delay with phase place the pulse width modulating signal that module produces, the second input input reference power source, output is connected between described the second fan and ground, for exporting pulse pulse wave according to described pulse width modulating signal generation module to described the second fan after receiving pulse width modulating signal; And
The first electric capacity, is connected between the positive pole and ground of described DC power supply;
Wherein, described fan drive circuit utilizes the inductance in described the first fan in the inoperative cycle, to produce distracted primary current at described pulse width modulating signal generation module, and described distracted primary current is stored in described the first electric capacity, and utilizes described distracted primary current to drive in advance described the second fan.
2. fan drive circuit as claimed in claim 1, it is characterized in that, described pulse width modulating signal generation module comprises the second electric capacity and voltage comparator, described voltage comparator comprises first input end, the second input and output, the first input end of described voltage comparator is connected with external power source, the second input of described voltage comparator is Voltage Reference end, and the output of described voltage comparator is connected with the first fan;
Wherein, when the external voltage source of described voltage comparator voltage is greater than the reference voltage of described voltage comparator, described voltage comparator output output high level signal is given described pulse width modulating signal generation module, make described pulse width modulating signal generation module export positive pulse wave, make described pulse width modulating signal generation module in the work period;
When the external voltage source of described voltage comparator is less than the reference voltage of described voltage comparator, the output output low level signal of described voltage comparator is given described pulse width modulating signal generation module, makes described pulse width modulating signal generation module in the described inoperative cycle.
3. fan drive circuit as claimed in claim 1, it is characterized in that, describedly phase-lockedly delay module with phase place and be connected with described pulse width modulating signal generation module, the described phase-locked pulse width modulating signal that is 180 for generation of phase difference with phase delay module is given described pulse width modulating signal generation module.
4. fan drive circuit as claimed in claim 2, it is characterized in that, described fan drive circuit also comprises the 3rd electric capacity and resistance, described the 3rd electric capacity is connected to the ground, described resistance is connected with described the second electric capacity, described the 3rd electric capacity and described resistance form a filter circuit, for the triangular wave that described pulse width modulating signal generation module is produced, convert square wave to for driving described the first fan and described the second fan.
5. fan drive circuit as claimed in claim 2, is characterized in that, also comprises:
Three fan, in parallel with described the first fan and described the second fan, and be connected with described DC power anode respectively;
Pulse wave is exported the second comparator, described pulse wave is exported the second comparator and is comprised first input end, the second input and output, the first input end that described pulse wave is exported the second comparator is phase-lockedly delayed module with phase place and is connected with described, the second input that described pulse wave is exported the second comparator is connected with described pulse width modulating signal generation module, the output that described pulse wave is exported the second comparator is connected with three fan, for exporting pulse wave to described three fan.
6. fan drive circuit as claimed in claim 5, it is characterized in that, describedly phase-lockedly delay module with phase place and be connected with described pulse width modulating signal generation module, the described phase-locked pulse width modulating signal that is 120 for generation of phase difference with phase delay module is given described pulse width modulating signal generation module.
7. fan drive circuit as claimed in claim 5, it is characterized in that, described fan drive circuit also comprises the first switch, second switch and the 3rd switch, described the first switch, the first electrode of second switch and the 3rd switch respectively with corresponding described the first fan, the second fan and three fan are connected, described the first switch, the second electrode of second switch and the 3rd switch is connected with earth terminal respectively, described the first switch, the control utmost point of second switch and the 3rd switch respectively with corresponding described voltage comparator, pulse wave is exported the first comparator and pulse wave and is exported the output of the second comparator and be connected,
When described pulse width modulating signal generation module is exported positive pulse wave, the control of described the first switch is high level very, described the first switch conduction, and described the first fan is started working;
When described pulse width modulating signal generation module quits work, the control of described the first switch is low level very, described the first fan quits work, and the inductance in described the first fan utilizes the described out-of-work time of pulse width modulating signal generation module to produce distracted primary current, and produced distracted primary current is stored in described the first electric capacity for driving in advance described the second fan.
8. fan drive circuit as claimed in claim 7, it is characterized in that, described the first switch, second switch and the 3rd switch are the nonmetal field effect transistor of N-type, the first electrode of described the first switch, second switch and the 3rd switch is the drain electrode of the nonmetal field effect transistor of N-type, the second electrode of described the first switch, second switch and the 3rd switch is the source electrode of the nonmetal field effect transistor of N-type, described in drive the first switch, second switch and the 3rd switch the control grid of the nonmetal field effect transistor of N-type very.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310084345.5A CN104065309B (en) | 2013-03-18 | 2013-03-18 | Fan drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310084345.5A CN104065309B (en) | 2013-03-18 | 2013-03-18 | Fan drive circuit |
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| Publication Number | Publication Date |
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| CN104065309A true CN104065309A (en) | 2014-09-24 |
| CN104065309B CN104065309B (en) | 2016-09-07 |
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| CN201310084345.5A Active CN104065309B (en) | 2013-03-18 | 2013-03-18 | Fan drive circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6392370B1 (en) * | 2000-01-13 | 2002-05-21 | Bedini Technology, Inc. | Device and method of a back EMF permanent electromagnetic motor generator |
| US20040027105A1 (en) * | 2002-08-08 | 2004-02-12 | Koji Nakamura | Drive apparatus for PWM control of two inductive loads with reduced generation of electrical noise |
| US6774587B2 (en) * | 2001-09-25 | 2004-08-10 | Siemens Vdo Automotive Inc. | Multiple brush-type motor control apparatus and method |
| CN1625041A (en) * | 2003-12-03 | 2005-06-08 | 台达电子工业股份有限公司 | Motor control circuit |
| CN101408186A (en) * | 2008-11-21 | 2009-04-15 | 中兴通讯股份有限公司 | Fan control device and method as well as multiple-fan control device and method |
-
2013
- 2013-03-18 CN CN201310084345.5A patent/CN104065309B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6392370B1 (en) * | 2000-01-13 | 2002-05-21 | Bedini Technology, Inc. | Device and method of a back EMF permanent electromagnetic motor generator |
| US6774587B2 (en) * | 2001-09-25 | 2004-08-10 | Siemens Vdo Automotive Inc. | Multiple brush-type motor control apparatus and method |
| US20040027105A1 (en) * | 2002-08-08 | 2004-02-12 | Koji Nakamura | Drive apparatus for PWM control of two inductive loads with reduced generation of electrical noise |
| CN1625041A (en) * | 2003-12-03 | 2005-06-08 | 台达电子工业股份有限公司 | Motor control circuit |
| CN101408186A (en) * | 2008-11-21 | 2009-04-15 | 中兴通讯股份有限公司 | Fan control device and method as well as multiple-fan control device and method |
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| CN104065309B (en) | 2016-09-07 |
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Denomination of invention: Fan drive circuit Effective date of registration: 20231127 Granted publication date: 20160907 Pledgee: Weitang sub branch of Zhejiang Jiashan Rural Commercial Bank Co.,Ltd. Pledgor: Jiashan Weitang Asset Management Co.,Ltd. Registration number: Y2023330002807 |