CN100527554C - Fan system and its protection system - Google Patents
Fan system and its protection system Download PDFInfo
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- CN100527554C CN100527554C CNB2006101415958A CN200610141595A CN100527554C CN 100527554 C CN100527554 C CN 100527554C CN B2006101415958 A CNB2006101415958 A CN B2006101415958A CN 200610141595 A CN200610141595 A CN 200610141595A CN 100527554 C CN100527554 C CN 100527554C
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- switch module
- fan system
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Abstract
The invention relates to a protective device of a fan system, which is used for receiving a first input signal. The invention comprises at least one first switch assembly and at least one control unit; the first switch assembly receives the first input signal; the control unit is connected with the first switch assembly, and receives and bases on the first input signal to control whether the first switch assembly is conducted or not conducted; when the first switch assembly is conducted, the control unit stops outputting the first input signal, and when the first switch assembly is not conducted, the control unit outputs the first input signal.
Description
Technical field
The present invention relates to a kind of system and protective device thereof, particularly relate to and a kind ofly can protect fan system and the protective device thereof of motor to avoid damaging.
Background technology
As Fig. 1 and shown in Figure 2, a kind of existing fan system 1 comprises a drive unit 11, a switching device 12 and a motor 13, and Fig. 2 is the equivalent circuit diagram of this fan system 1.This drive unit 11 produces one first input signal S1 and one second input signal S2, and this first input signal S1 is a pulse signal, and by a switch module 1111 action of an inverter 111, and this pulse signal is converted to the rp pulse signal, i.e. this second input signal S2, so this second input signal S2 and this first input signal S1 are anti-phase each other, in addition, above-mentioned this drive unit 11 can be Hall IC (HallEffect IC), and this first input signal S1 is or/and this second input signal S2 can be the Hall signal; This switching device 12 has two switch modules 121,122, receives this first input signal S1 and this second input signal S2 respectively; This motor 13 has one first coil 131, one second coil 132 and a rotor structure (figure show), and is example with a direct current brushless motor then at this.This drive unit 11 is electrically connected with this switching device 12, and the described switch module 121,122 of this switching device 12 is electrically connected with this first coil 131 and this second coil 132 of this motor 13 respectively.As shown in Figure 2, the action of this fan system 1 is as follows: this drive unit 11 is controlled described switch module 121,122 conductings by this first input signal S1 and this second input signal S2, produce electromagnetic induction to drive 132 pairs of these rotor structures of this first coil 131 or this second coil in turn, make this motor 13 runnings.
Get loose and cause this rotor structure to block and stop operating when this fan system 1 is subjected to external force influence or intraware, at this moment, this first input signal S1 or this second input signal S2 promptly change a high potential signal into.
Because this fan system 1 can't judge that this motor 13 has shut down, so this motor 13 will continue to receive this first input signal S1 and this second input signal S2.Yet, the electric energy that this motor 13 is received can't transfer kinetic energy to by this rotor structure and discharge, transfer heat energy on the contrary to and cause the temperature of this motor 13 to rise, so make this motor 13 to reduce the reliability and the useful life of this motor 13 because of overheated and impaired or burn.
Therefore, how to provide a kind of unusual or when shutting down, can protect the fan system and the protective device thereof of motor, become one of important topic to avoid damaging in motor.
Summary of the invention
Because above-mentioned problem, purpose of the present invention is for providing a kind of unusual or when shutting down in motor, can protect motor to damage avoiding, and can promote the fan system and the protective device thereof in reliability and useful life.
For achieving the above object, the protective device of foundation a kind of fan system of the present invention receives one first input signal, and this protective device comprises at least one first switch module and at least one control unit.This first switch module receives this first input signal; This control unit is electrically connected with this first switch module, receive and according to this first input signal to control the conducting or the not conducting of this first switch module; Wherein, when this first switch module conducting, this control unit stops to export this first input signal, and when this not conducting of first switch module, this control unit is exported this first input signal.
For achieving the above object, comprise a drive unit, a protective device and a motor according to a kind of fan system of the present invention.This drive unit produces one first input signal; This protective device is electrically connected with this drive unit, and have at least one first switch module and an at least one control unit, this first switch module receives this first input signal, this control unit is electrically connected with this first switch module, receive and according to this first input signal to control the conducting or the not conducting of this first switch module; This motor has a coil groups, and is electrically connected with this protective device respectively; Wherein, when this first switch module conducting, this control unit stops to export this first input signal, and when this not conducting of first switch module, this control unit is exported this first input signal, to control this motor running.
As mentioned above, according to a kind of fan system of the present invention and protective device thereof by at least one control unit according to one first input signal to control the conducting or the not conducting of at least one first switch module, and when this first switch module conducting, this control unit stops to export this first input signal, with the protection motor; And during this not conducting of first switch module, this control unit is exported this first input signal, with the running of control motor.Compare with prior art; protective device provided by the present invention is can be in this motor unusual or when shutting down; control this first switch module conducting; make this first input signal ground connection and stop to export to this motor; avoid this motor because of overheated and impaired or burn the reliability of also unlikely this fan system of reduction and useful life.
Description of drawings
Fig. 1 is a kind of schematic diagram of existing fan system;
Fig. 2 is the equivalent circuit diagram of Fig. 1;
Fig. 3 is according to a kind of fan system of preferred embodiment of the present invention and the schematic diagram of protective device thereof;
Fig. 4 is the schematic diagram when wherein this motor is embodied as the half-bridge circuit configuration according to preferred embodiment of the present invention;
Fig. 5 is the equivalent circuit diagram of Fig. 4;
Fig. 6 A and Fig. 6 B are in normal and abnormal waveforms schematic diagram according to first input signal of preferred embodiment of the present invention; And
Fig. 6 C and Fig. 6 D are for according to the capacitor of preferred embodiment of the present invention schematic diagram in the normal and unusual situation that discharges and recharges.
The element numbers explanation:
1,2 fan systems, 11,21 drive units
111 inverters, 1111 switch modules
12 switching devices, 121,122 switch modules
13,23 motors, 131,2,311 first coils
132,2,312 second coils, 211 inverters
2111 switch modules, 22 protective devices
221,222 control units, 223,224 first switch modules
231 coil groups, 24 second switch component groups
241,242 second switch assembly S1, first input signal
The S2 second input signal S3 first input signal
The S4 second input signal R1 first resistor
The R2 second resistor C capacitor
H high potential signal VRC saturation voltage
The VTH operation voltage
Embodiment
Hereinafter with reference to accompanying drawing, a kind of fan system and protective device thereof according to preferred embodiment of the present invention are described, wherein identical assembly will be illustrated with identical label.
Please refer to shown in Figure 3ly, a kind of fan system 2 of preferred embodiment of the present invention comprises a drive unit 21, a protective device 22 and a motor 23.
This drive unit 21 produces one first input signal S3 and one second input signal S4, and this first input signal S3 can be a Hall signal on implementing, and this Hall signal can produce by a Hall IC (figure show), and this second input signal S4 is the anti-phase signal of this first input signal S3.
This motor 23 has a coil groups 231 and a rotor structure (figure does not show), and this rotor structure produces running by the electromagnetic induction of this coil groups 231, to drive this motor 23 runnings.
This protective device 22 is electrically connected with this drive unit 21 and this motor 23 respectively, and also optionally is arranged in this drive unit 21 on implementing.This protective device 22 has at least one first switch module and at least one control unit; then having 221,222 and two first switch modules 223,224 of two control units with this protective device 22 at this is example, and described first switch module 223,224 has an operation voltage VTH (shown in Fig. 6 C and Fig. 6 D) respectively.Described first switch module 223,224 is electrically connected with described control unit 221,222 respectively, and receive this first input signal S3 and this second input signal S4 respectively, with according to this first input signal S3 and this second input signal S4 and control the conducting or the not conducting of described first switch module 223,224 respectively.Described first switch module 223,224 of present embodiment is also unrestricted, is a MOS transistor or a BJT transistor on implementing.
Referring again to shown in Figure 3; this fan system 2 also comprises at least one second switch component groups 24; it is arranged between this coil groups 231 and this protective device 22; when this motor 23 is full-bridge circuit configuration; this coil groups 231 includes at least one coil; and this second switch component groups 24 is provided with at least four second switch assemblies accordingly; in addition; when this motor 23 is half-bridge circuit configuration; this coil groups 231 includes at least two coils; and this second switch component groups 24 is provided with at least two second switch assemblies accordingly; replace On/Off by each second switch assembly; and make described coil alternating current, and make that this motor 23 is turned round through electric current.
Please refer to Fig. 4 and shown in Figure 5, Fig. 5 is the equivalent circuit diagram of Fig. 4, at this this motor 23 is to be configured to example to be embodied as a half-bridge circuit, therefore this coil groups comprises one first coil 2311 and one second coil 2312, and this second switch component groups comprises two second switch assemblies 241,242 accordingly.
By Fig. 4 and Fig. 5 as can be known, this drive unit 21 can by a switch module 2111 actions of an inverter 211 with this first input signal S3 anti-phase be this second input signal S4.
Referring again to shown in Figure 5, described control unit 221,222 comprises one first resistor R 1, a capacitor C and one second resistor R 2.Below be that example is illustrated with this control unit 221, an end of this first resistor R 1 is electrically connected with one first end and this first coil 231 of this first switch module 223 respectively, and receives this first input signal S3; The end of this capacitor C is electrically connected with the other end of this first resistor R 1 and one second end of this first switch module 223 respectively, and the other end of this capacitor C is electrically connected with one the 3rd end of this first switch module 223 and ground connection; One end of this second resistor R 2 is electrically connected with this end of this capacitor C, the other end ground connection of this second resistor R 2.This of present embodiment first resistor R 1 and this second resistor R 2 are in order to this first input signal S3 dividing potential drop, and this capacitor C is as the usefulness that discharges and recharges, and have a saturation voltage VRC (shown in Fig. 6 C and Fig. 6 D), and this saturation voltage VRC is greater than this operation voltage VTH.The formation of this control unit 222 is identical with this control unit 221 with function, and its connected mode and this control unit 221 differences are: this control unit 222 receives this second input signal S4, and is electrically connected with this second coil 232.
At this; the action that this fan system 2 is described in addition is as follows: this drive unit 21 produces this first input signal S3; and produce and anti-phase this second input signal S4 of this first input signal S3 by this inverter 211; at this moment; this first input signal S3 and this second input signal S4 are all this pulse signal (as shown in Figure 6A) that continues input; and the described control unit 221 of this protective device 22; 222 and described first switch module 223; 224 receive this first input signal S3 and this second input signal S4 respectively; and to the lasting charge or discharge (shown in Fig. 6 C) of this capacitor C; and because this capacitor C does not reach saturation voltage VRC; and less than described first switch module 223; this operation voltage VTH of 224; so described control unit 221; 222 control described first switch module 223 respectively; 224 not conductings; this first input signal S3 and this second input signal S4 then can deliver to described second switch assembly 241 respectively; in 242; so that described second switch assembly 241; 242 respectively according to this first input signal S3 and this second input signal S4 and conducting or not conducting; produce induction with this first coil 2311 or this second coil 2312 of controlling this motor 23, drive this rotor structure and rotate.Get loose and cause this rotor structure to block and when stopping operating when this fan system 2 is subjected to external force influence or intraware; this drive unit 21 makes that this first input signal S3 or this second input signal S4 are a high potential signal H (shown in Fig. 6 B); and deliver to this protective device 22; at this moment; this first input signal S3 or this second input signal S4 charge to saturation condition with this capacitor C; and therefore make this capacitor C just as open circuit; at this moment; output after this first resistor R 1 and this second resistor R, 2 dividing potential drops is greater than this operation voltage VTH (shown in Fig. 6 D); so described control unit 221; 222 make described first switch module 223 respectively; 224 conductings and ground connection; and simultaneously with this high potential signal H ground connection, and described control unit 221; 222 stop to export this first input signal S3 and this second input signal S4.When this rotor structure remove unusual or the situation blocked after; then this first input signal S3 and this second input signal S4 then revert to this pulse signal; and this saturation voltage VRC is by this first resistor R 1 and 2 discharges of this second resistor R, so 23 in this motor recovers to run well.
Because this fan system 2 is by the described control unit 221,222 and described first switch module 223,224 of this protective device 22; to receive this first input signal S3 and this second input signal S4 respectively; utilize the conducting or the not conducting of described first switch module 223,224 of described control unit 221,222 controls again, to control output or to stop to export this first input signal S3 or this second input signal S4.
What this must replenish in addition be; this motor 23 of the present invention is not limited to be embodied as the half-bridge circuit configuration as Fig. 4 and Fig. 5; it also can be embodied as the full-bridge circuit configuration; it does not exist together and only is difference on coil quantity and the second switch component count; right its resist technology for motor is all identical, so in this not newly-increased in addition accompanying drawing and explanation.
In sum, a kind of fan system of the present invention and protective device thereof by at least one control unit according to one first input signal to control the conducting or the not conducting of at least one first switch module, and when this first switch module conducting, this control unit stops to export this first input signal, with the protection motor; And during this not conducting of first switch module, this control unit is exported this first input signal, with the running of control motor.Compare with prior art; protective device provided by the present invention is can be in this motor unusual or when shutting down; control this first switch module conducting; make this first input signal ground connection and stop to export to this motor; avoid this motor because of overheated and impaired or burn the reliability of also unlikely this fan system of reduction and useful life.
The above only is an illustrative, but not is limitation of the present invention.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the claim of the present invention its equivalent modifications of carrying out or change.
Claims (23)
1. the protective device of a fan system electrically connects a motor, receives one first input voltage signal, and this protective device comprises:
At least one first switch module receives this first input voltage signal; And
At least one control unit is electrically connected with this first switch module, receive and according to this first input voltage signal to control the conducting or the not conducting of this first switch module;
Wherein, when this first input voltage signal during greater than an operation voltage of this first switch module, this switch module conducting, this control unit stops to export the coil of this first input voltage signal to this motor, when this not conducting of first switch module, this control unit is exported this first input voltage signal this coil to this motor.
2. protective device as claimed in claim 1, wherein this first input voltage signal is a Hall signal.
3. protective device as claimed in claim 1, it also receives one second input signal, and itself and this first input voltage signal is anti-phase.
4. protective device as claimed in claim 3, wherein the anti-phase of this second input signal realizes by an inverter.
5. protective device as claimed in claim 4, wherein this inverter comprises a resistor and a switch module, and this resistor one end electrically connects this switch module.
6. protective device as claimed in claim 1, wherein this first input voltage signal is a high potential signal or an electronegative potential signal, and when this first input signal when continuing this high potential signal, this first switch module is conducting.
7. protective device as claimed in claim 1, wherein this first switch module is a MOS transistor or a BJT transistor.
8. protective device as claimed in claim 7, wherein this control unit comprises:
One first resistor, the one end is electrically connected with one first end of this first switch module, and receives this first input voltage signal;
One capacitor, one end are that the grid or the transistorized base stage of BJT of MOS transistor is electrically connected with one second end of the other end of this first resistor and this first switch module respectively, and its other end is electrically connected with one the 3rd end of this first switch module and ground connection; And
One second resistor, the one end is electrically connected its other end ground connection with this end of this capacitor.
9. fan system comprises:
One drive unit produces one first input voltage signal;
One protective device, be electrically connected with this drive unit, and have at least one first switch module and an at least one control unit, this first switch module receives this first input voltage signal, this control unit is electrically connected with this first switch module, receive and according to this first input voltage signal to control the conducting or the not conducting of this first switch module; And
One motor is electrically connected with this protective device;
Wherein, when this first input voltage signal during greater than an operation voltage of this first switch module, this first switch module conducting, this control unit stops to export this first input voltage signal to this motor, when this not conducting of first switch module, this control unit is exported this first input voltage signal to this motor, to control this motor running.
10. fan system as claimed in claim 9, wherein this motor includes a coil groups.
11. fan system as claimed in claim 9, wherein this first input voltage signal is a Hall signal.
12. fan system as claimed in claim 9, it more receives one second input signal, and itself and this first input voltage signal is anti-phase.
13. fan system as claimed in claim 12, wherein the anti-phase of this second input signal realizes by an inverter.
14. fan system as claimed in claim 13, wherein this inverter comprises a resistor and a switch module, and this resistor one end electrically connects this switch module.
15. fan system as claimed in claim 13, wherein this inverter is arranged in this drive unit.
16. fan system as claimed in claim 9, wherein this first input voltage signal is a high potential signal or an electronegative potential signal, and when this first input signal when continuing this high potential signal, this first switch module is conducting.
17. fan system as claimed in claim 9, wherein this first switch module is a MOS transistor or a BJT transistor.
18. fan system as claimed in claim 17, wherein this control unit comprises:
One first resistor, one end are electrically connected with one first end and this motor of this first switch module respectively, and receive this first input signal;
One capacitor, one end are that the grid or the transistorized base stage of BJT of MOS transistor is electrically connected with one second end of the other end of this first resistor and this first switch module respectively, and its other end is electrically connected with one the 3rd end of this first switch module and ground connection; And
One second resistor, the one end is electrically connected its other end ground connection with this end of this capacitor.
19. fan system as claimed in claim 9, wherein this protective device is that alternative is arranged at this drive unit.
20. fan system as claimed in claim 10, wherein this motor is half-bridge circuit configuration or full-bridge circuit configuration.
21. fan system as claimed in claim 20, it also comprises at least one second switch assembly, is arranged between this coil groups and this protective device.
22. fan system as claimed in claim 21, when wherein this motor was the half-bridge circuit configuration, this coil groups comprised at least two coils, and this fan system is provided with at least two second switch assemblies accordingly.
23. fan system as claimed in claim 21, when wherein this motor was the full-bridge circuit configuration, this coil groups comprised at least one coil, and this fan system is provided with at least four second switch assemblies accordingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101415958A CN100527554C (en) | 2006-09-30 | 2006-09-30 | Fan system and its protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101415958A CN100527554C (en) | 2006-09-30 | 2006-09-30 | Fan system and its protection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101154804A CN101154804A (en) | 2008-04-02 |
| CN100527554C true CN100527554C (en) | 2009-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101415958A Active CN100527554C (en) | 2006-09-30 | 2006-09-30 | Fan system and its protection system |
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| Country | Link |
|---|---|
| CN (1) | CN100527554C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018220861B3 (en) * | 2018-12-03 | 2020-04-02 | Conti Temic Microelectronic Gmbh | Method for recognizing the functionality of an electrical switching unit, computer program product for executing such a method and full-bridge circuit with a control device for executing such a method |
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2006
- 2006-09-30 CN CNB2006101415958A patent/CN100527554C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101154804A (en) | 2008-04-02 |
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