CN2450413Y - Two-stage rotating speed controlled fan motor - Google Patents
Two-stage rotating speed controlled fan motor Download PDFInfo
- Publication number
- CN2450413Y CN2450413Y CN 00257617 CN00257617U CN2450413Y CN 2450413 Y CN2450413 Y CN 2450413Y CN 00257617 CN00257617 CN 00257617 CN 00257617 U CN00257617 U CN 00257617U CN 2450413 Y CN2450413 Y CN 2450413Y
- Authority
- CN
- China
- Prior art keywords
- fan
- voltage
- control
- buffer circuit
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model relates to a two-stage rotation speed controlled fan motor. The utility model mainly comprises a buffer circuit, a control voltage end and a fan; the buffer circuit is arranged between a power supply end and the voltage input end of the fan, and the buffer circuit comprises a resistor and a transistor; the control voltage end is connected with the transistor of the buffer circuit and controls whether the transistor is switched on or not so as to make the voltage of the voltage input end of the fan different in value, besides, the change of the size of voltage waveform is smoothly linear waveforms, and therefore, the rotation speed of the fan can be gradually increased or decreased between a low speed mode and a high speed mode.
Description
The utility model relates to a kind of fan electromotor of two section type rotating speed control, particularly relevant a kind of buffer circuit energy output smoothing voltage waveform when voltage just changes that utilizes, fan is in when changing between low-speed mode and the fast mode operating condition, rotation speed of the fan is speedup or deceleration gently, the fan electromotor that is beneficial to increase the service life.
Present computer and peripheral equipment thereof etc. generally adopt radiation fan as heat dissipation element, and temperature raises in the generation systems to avoid system's (computer) itself to dispel the heat bad, and then causes this system's generation deadlock or electronic component to burn.In the radiation fan running, when temperature is not high in this system, fan only needs low-speed running, at this moment, if this fan is in the state of running up, unnecessary increase work loads load then takes place and produce noise noise, when a complete year full load causes temperature quite high in this system, fan need run up, at this moment, if this fan is in the low-speed running state, problems such as deadlock or electronic component burn then take place, in order to overcome the above problems, people develop the speed adjusting type radiation fan, to adjust this rotation speed of the fan relatively under different temperature environments.
Existing radiation fan, the 5th, 197, No. 858 " temperature speed control formula brush DC radiation fan " patent cases of U. S. Patent that on March 30th, 1993 was announced are shown in 2A to the 2C oscillogram of Fig. 1 and Fig. 2.This Fig. 1 is a fan speed control circuit diagram; 2A to the 2C oscillogram of Fig. 2 is the output waveform of fan speed control circuit.Please refer to shown in Figure 1, the 5th, 197, the fan speed control circuit that discloses for No. 858 is behind power turn-on, via the contrary protection diode D1 that presses, and add on circuit and the fan brushless electric machine, the mutual induced action of mat winding coil and annular permanent magnnet makes fan blade begin to rotate; At this moment, the Hall effect inducting IC IC1 by direct current generator commutation point of action provides certain electric current and DC potential via resistance R 3, R2, can sense the changes of magnetic field electric wave between fan winding coil and the annular permanent magnnet.This Hall effect inducting IC IC1 output positive voltage V+ and negative electricity V-are to drive integrated circult IC2, this drive integrated circult IC2 obtains being same as the F.G waveform shown in Fig. 2 A with aforementioned two waveforms through builtin voltage comparison shaping processing, and the electric wave of being exported with this homophase electric wave control semiconductor switch A1 and A2, shown in Fig. 2 B and Fig. 2 C.Electric wave control fan electromotor winding L 1, L2 and the L3 and the L4 (winding coil) that utilize semiconductor switch A1 and A2 to be exported produce the commutation start with magnetic couple (annular permanent magnnet), timing capacitor C1 is then stopping to the electric energy of resetting again after fully motionless for drive integrated circult IC2 itself provides flabellum, it can make fan running by the moving system of body that Hall effect inducting IC IC1 and drive integrated circult IC2 are constituted, and sends the periodic pulse signal of detection.IC3 (not indicating) inside is by three operational amplifier IC31, IC32 and IC33 form, wherein this IC31 and resistance R 4, R5, R6, R7, R8, R9, R10 and temperature control speed change inductor Rth form the rotating speed and the temperature slope control circuit of fan temperature control speed change, by this temperature control speed change inductor Rth characteristic that its resistance value also changes under different temperatures, temperature control speed change inductor Rth and resistance R 4 formed voltage Va are also varied with temperature and change, itself and resistance R 9 and the formed reference voltage Vref of R10 are after big device IC31 computing is attacked in computing, make the Vb voltage change, transistor T R2 conducting electric current also changes, and then rotation speed of the fan changes and reaches the purpose of temperature-controlled fan speed change.Yet the waveform that exports winding L 1, L2 and L3 and L4 to via drive integrated circult IC2 the 5th, 197, No. 858 is a square wave, shown in Fig. 2 B and Fig. 2 C; The Vb voltage change of exporting according to ambient temperature via operational amplifier IC31 in addition, though transistor T R2 conducting electric current is changed, this transistor T R2 still exports square wave.Because the input square wave makes fan rotate along with square wave takes place by anxious speedup or anxious the deceleration to winding L 1, L2 and L3 and L4, this moment, rotation speed of the fan caused rocking because of taking place to change rapidly, and then made fan minimizing in working life.
Another existing radiation fan is in the 5th, 942, No. 866 " the wide modulation control circuit of brush DC fan ripple " patent cases of U. S. Patent of bulletin on August 24th, 1999, as shown in Figures 3 and 4.Fig. 3 is the control circuit Block Diagram, and Fig. 4 is the output waveform figure of control switch.Please refer to shown in Figure 3, the 5th, 942, disclosing fan control circuitry 10 No. 866 is made up of a rectification circuit 20, a voltage comparator 21 and a control switch 22, the continuous square wave signal sent for the input end T that obtains fan 23 of this rectification circuit 20 wherein, and after this rectification circuit 20 carries out square wave signal filtering and rectification and is a direct current voltage, be fed through the negative-phase input of voltage comparator 21, the normal phase input end of this voltage comparator 21 is connected with a reference voltage of presetting, for the setting value of setting rotating speed of fan.The output terminal of this voltage comparator 21 is as the control signal of control switch 22, and this control switch 22 can be the electronic switch of a transistor or equivalence, it is serially connected with between the voltage input end of power source supply end Vcc and fan 23, this control switch 22 can make VDC and the reference voltage Vref sent into by rectification circuit 20 compare, if the voltage that this rectification circuit 20 exports voltage comparator 21 to is lower than reference voltage Vref when (commentaries on classics of fan 23 connects lower), these voltage comparator 21 output HIGH voltages, connect so that control switch 22 is opened, and the rotating speed of fan 23 is improved; When the rotating speed of this fan 23 surpasses desired speed, these rectification circuit 20 output voltages surpass reference voltage Vret, at this moment, make voltage comparator 21 outputs change low voltage into so that control switch 22 shutdowns, make this fan 23 outages, repeating aforementioned these control switch 22 intermittent keyings makes fan 23 be maintained at a fixed rotating speed state, also just change and form types of modulation and these control switch 22 output waveforms open and close for intermittence and open and close width with rotating speed, as shown in Figure 4, be the rotating-speed control circuit that forms the wide modulation of a kind of ripple.Yet, the 5th, 942, No. 866 output waveforms are the intermittent square wave that opens and closes, and anxious speedup or anxious the deceleration take place in the keying that fan 23 rotates along with square wave or control switch 22, and this moment, rotation speed of the fan caused rocking because of taking place to change rapidly, and then make fan minimizing in working life.
Therefore, the speedup of rotation speed of the fan or moderating process need to improve, and make rotation speed of the fan speedup or deceleration gently, to avoid fan anxious speedup or anxious deceleration take place, and then can prolong fan working life.
The utility model main purpose provides a kind of fan electromotor of two section type rotating speed control, it is provided with a buffer circuit between power source supply end and fan voltage input end, the voltage of the exportable smooth linear of this buffer circuit changes waveform, make rotation speed of the fan be able to mild speedup or deceleration, can avoid taking place anxious speedup of rotation speed of the fan or anxious the deceleration, make the utlity model has to prolong the fan effect in working life.
Another purpose of the present utility model provides a kind of fan electromotor of two section type rotating speed control, and it finishes the two section type rotating speed control of fan with less and simple elements, and can come the rotating speed of setting changing low speed by changing a resistance value.
The purpose of this utility model is achieved in that a kind of fan electromotor of two section type rotating speed control, and it is characterized in that: this fan electromotor comprises: a fan; One buffer circuit, it is located between power source supply end and the fan voltage input end, and it comprises a resistance and a transistor; And one control voltage end, it is connected in the transistorized base stage of this buffer circuit, when the voltage of power Vcc equals to control the voltage Vctrl of voltage end, the transistor of this buffer circuit is not conducting, electric current can't be passed through, therefore power Vcc can be reduced the fan input terminal voltage Vf of drive fan by the dividing potential drop of resistance, thereby only with the low voltage drive fan, makes fan be in the low-speed mode operating condition; When the voltage Vctr1 of control voltage end equals zero, the transistor of this buffer circuit is conducting, make the fan input terminal voltage Vf of drive fan equal power source voltage Vcc, thereby, make fan be in the fast mode operating condition with whole power source voltage Vcc drive fan.
It comprises a temperature sensing circuit in addition, the output of this temperature sensing circuit is connected in the control voltage end, this temperature sensing circuit comprises a plurality of as the resistance of setting reference voltage Vref, and with this reference voltage Vref as for the end of oppisite phase of input comparator, the thermistor of one sense ambient temperature, with the positive terminal of decision temperature voltage Vi for input comparator, an and voltage comparator, through this voltage comparator with reference voltage Vref and temperature voltage Vi relatively after output, voltage as the control voltage end makes fan be in low-speed mode operating condition or fast mode operating condition with decision.
The resistance two ends of buffer circuit are to be connected to the transistorized radio utmost point and collector electrode.
The transistorized base stage of buffer circuit is connected in the control voltage end through a resistance, and is connected to power source supply end through another resistance.
Be provided with in the buffer circuit by different resistances and control the resistance of fan at the rotating speed of low-speed mode running.
The fan electromotor of two section type rotating speed control of the present utility model, it mainly comprises a buffer circuit, a control voltage end and a fan.This buffer circuit is located between power source supply end and the fan voltage input end, and this buffer circuit comprises a resistance and a transistor, and this control voltage input end is the transistorized substrate that is connected in buffer circuit.When power source voltage equals to control voltage, not conducting of the transistor open of this buffer circuit, so the resistance of buffer circuit can dividing potential drop and reduce drive fan voltage, thereby fan is in " low-speed mode " operating condition.When control voltage equalled zero, the transistor turns close of this buffer circuit made the voltage of drive fan equal power source voltage, thereby fan is in " fast mode " operating condition.
The utility model mainly connects a buffer circuit at power source supply end Vcc, this buffer circuit can be exported different high low voltage air feed fan runnings and use according to the change of control voltage, and between the change of high low voltage, its voltage waveform is into level and smooth linear waveform, make mild speedup of rotation speed of the fan or deceleration, can avoid taking place anxious speedup of rotation speed of the fan or anxious the deceleration, to prolong fan working life.
Following preferred embodiment and accompanying drawing describe the purpose of this utility model, feature and advantage in detail:
Fig. 1 is the fan speed control circuit diagram of No. the 198511st, Taiwan patent announcement.
Fig. 2 A to Fig. 2 C is the output waveform figure of No. the 198511st, Taiwan patent announcement.
Fig. 3 is No. 327486 control circuit Block Diagram of Taiwan patent announcement.
Fig. 4 is No. 327486 control switch output waveform figure of Taiwan patent announcement.
Fig. 5 is the circuit diagram of the fan electromotor of the utility model first preferred embodiment two section type rotating speed control.
Fig. 6 and Fig. 7 are respectively the waveform schematic representation of the fan electromotor of first preferred embodiment two section type rotating speed control at " low-speed mode " and " fast mode " tach signal.
Fig. 8 is the circuit diagram of the fan electromotor of the utility model second preferred embodiment two section type rotating speed control.
The fan electromotor of the utility model two section type rotating speed control mainly is located at buffer circuit between power source supply end and the fan voltage input end, this buffer circuit comprises a resistance and a transistor, the two ends of this resistance are connected to the transistorized radio utmost point and collector electrode respectively, transistorized base stage then is connected in the control voltage end through a resistance, transistorized base terminal also connects power end through another resistance, when power source voltage equals to control voltage, not conducting of the transistor Open of this buffer circuit, therefore this resistance is understood dividing potential drop and is reduced drive fan voltage, thereby fan is in " low-speed mode " operating condition.When control voltage equalled zero, the transistor turns close of this buffer circuit made the voltage of drive fan equal power source voltage, thereby fan is in " fast mode " operating condition.
The fan electromotor of the utility model two section type rotating speed control also can temperature sensing circuit testing environment temperature, so that obtain the voltage by temperature change (to call temperature voltage in the following text), and compare at comparator with this temperature voltage and power source voltage, with the decision rotation speed of the fan in " low-speed mode " running or " fast mode " running.
Fig. 5 is the circuit diagram of the fan electromotor of the utility model first preferred embodiment two section type rotating speed control; Fig. 6 and Fig. 7 are the fan electromotor of the utility model first preferred embodiment two section type rotating speed control reaches " fast mode " tach signal at " low-speed mode " waveform schematic representation.
Please refer to shown in Figure 5ly, the fan electromotor of first preferred embodiment two section type rotating speed control mainly comprises a buffer circuit 100, a control voltage end 110 and a fan 120.This buffer circuit 100 is located between power source supply end voltage vcc and the fan Input voltage terminal Vf, this buffer circuit 100 comprises a resistance (R1) 101 and a transistor (TR) 102, these resistance 101 two ends are connected to the radio utmost point and the collector electrode of transistor 102,101 of voltage ends of control are connected in the base stage of transistor (TR) 102 through a resistance 103, and the base stage of this transistor (TR) 102 also is connected to power source supply end Vcc through resistance 104.When the voltage of power Vcc equals to control voltage Vctrl, the transistor of this buffer circuit 100 (TR) 102 not conducting Open and electric current can't pass through, therefore this resistance (R1) 101 meeting dividing potential drops reduce the fan input terminal voltage Vf of drive fan, thereby only making fan be in " low-speed mode " operating condition with the low voltage drive fan, the resistance value that therefore changes resistance (R1) 101 also can change the running rotating speed of " low-speed mode ".When control voltage Vctrl equals zero, the transistor of this buffer circuit 100 (TR) 102 conducting close, make the fan input terminal voltage Vf of drive fan equal power source voltage Vcc, thereby during with whole power source voltage Vcc drive fan, fan is in " fast mode " operating condition.Therefore, switch in the turn on process from not conducting at transistor (TR) 102, fan input terminal voltage Vf increases to power source voltage Vcci gently from the dividing potential drop with resistance (R1) 101, or transistor (TR) 102 in conducting switches to not turn on process, fan input terminal voltage Vf is reduced to dividing potential drop with resistance (R1) 101 gently from power source voltage Vcc.Please refer to shown in Figure 6ly, when the voltage of power Vcc equals to control voltage Vctrl,, make fan be in " low-speed mode " operating condition only with the low voltage drive fan.Please refer to shown in Figure 7ly, when control voltage Vctrl equals zero,, make fan be in " fast mode " operating condition with power source voltage Vcc drive fan.
Please refer to Fig. 1, Fig. 3 and shown in Figure 5, U. S. Patent the 5th, 197, the Vb voltage change of exporting according to ambient temperature via operational amplifier ICH for No. 858, though transistor T R2 conducting electric current is changed, but the not conducting of this transistor T R2 and conducting only can be exported the square wave that no-voltage and supply voltage are formed, because input square wave to fan-shaped becomes fan to be in outage or on state, this square wave drives winding L 1, L2 and L3 and L4 make the fan rotation along with square wave takes place by anxious speedup or anxious the deceleration, this moment, rotation speed of the fan caused rocking because of taking place to change rapidly, and then made fan minimizing in working life.In addition, U. S. Patent the 5th, 942, No. 866 output waveforms are the intermittent square wave that opens and closes, anxious speedup or anxious deceleration shortcoming take place along with the keying of square wave or control switch 22 in fan 23 rotations inevitably.On the contrary, the utility model is formed buffer circuit 100 with resistance (R1) 101 and transistor (TR) 102, and it avoids fan 120 to be in off-position.Therefore the voltage of no matter controlling voltage end is to equal zero or equaling power source voltage Vcc, the voltage that can keep fan 120 output voltage V f being had smooth linear by this buffer circuit 100 changes waveform, rotation speed of the fan can be reached at " low-speed mode " form mild speedup or deceleration between the running of " fast mode ", thereby make fan 120 smooth rotation in increasing rotating speed or turn reducing speed process, to prolong fan working life
Fig. 8 is the circuit diagram of the fan electromotor of the utility model second preferred embodiment two section type rotating speed control.Second preferred embodiment of the present utility model only is different from first preferred embodiment at the control voltage end, therefore prolongs with identical figure number, and the detailed description of both same sections then will not be given unnecessary details.
Please refer to shown in Figure 8ly, the fan electromotor of second preferred embodiment two section type rotating speed control mainly comprises a buffer circuit 100, control voltage end 110, a fan 120 and a temperature sensing circuit 130.This temperature sensing circuit 130 comprises a plurality of resistance (R4, R6, R7) 131, one thermistor (R5) 132 and a voltage comparator comparator133, it utilizes resistance R 6, R7 to set reference voltage Vref as the end of oppisite phase for input comparator 133, utilize resistance (R4) 131 and thermistor (R5) 132 sense ambient temperature, with the positive terminal of decision temperature voltage Vi for input comparator 133, through this comparator 133 with reference voltage Vref and temperature voltage Vi relatively after, export control voltage end 110 (Vctrl) to.Suppose that the switching temperature value is 50 ℃, when the ambient temperature of thermistor (R5) 132 sensings is higher than 50 ℃, then temperature voltage Vi is less than reference voltage Vref, therefore, comparator 133 output control voltage Vctrl=0 make transistor (TR) 102 conductings of buffer circuit 100 and fan 120 is in " fast mode " operating condition.Temperature reduction resistance value rising when thermistor (R5) 132, make temperature voltage Vi greater than reference voltage Vref, comparator 133 output makes control voltage equal power source voltage Vcc, makes transistor (TR) the 102 not conductings of buffer circuit 100 and fan 120 is in " low-speed mode " operating condition.The action of this buffer circuit 100 is disclosed in the detailed description of the utility model first preferred embodiment, incorporates reference into, will not give unnecessary details at this.
Claims (5)
1, a kind of fan electromotor of two section type rotating speed control, it is characterized in that: this fan electromotor comprises: a fan; One buffer circuit, it is located between power source supply end and the fan voltage input end, and it comprises a resistance and a transistor; And one control voltage end, it is connected in the transistorized base stage of this buffer circuit, when the voltage of power Vcc equals to control the voltage Vctrl of voltage end, the transistor of this buffer circuit is not conducting, electric current can't be passed through, therefore power Vcc can be reduced the fan input terminal voltage Vf of drive fan by the dividing potential drop of resistance, thereby only with the low voltage drive fan, makes fan be in the low-speed mode operating condition; When the voltage Vctrl of control voltage end equals zero, the transistor of this buffer circuit is conducting, make the fan input terminal voltage Vf of drive fan equal power source voltage Vcc, thereby, make fan be in the fast mode operating condition with whole power source voltage Vcc drive fan.
2, the fan electromotor of two section type rotating speed control as claimed in claim 1, it is characterized in that: it comprises a temperature sensing circuit in addition, the output of this temperature sensing circuit is connected in the control voltage end, this temperature sensing circuit comprises a plurality of as the resistance of setting reference voltage Vref, and with this reference voltage Vref as for the end of oppisite phase of input comparator, the thermistor of one sense ambient temperature, with the positive terminal of decision temperature voltage Vi for input comparator, an and voltage comparator, through this voltage comparator with reference voltage Vref and temperature voltage Vi relatively after output, voltage as the control voltage end makes fan be in low-speed mode operating condition or fast mode operating condition with decision.
3, the fan electromotor of two section type rotating speed control as claimed in claim 1, it is characterized in that: the resistance two ends of buffer circuit are to be connected to the transistorized radio utmost point and collector electrode.
4, the fan electromotor of two section type rotating speed control as claimed in claim 1, it is characterized in that: wherein the transistorized base stage of buffer circuit is connected in the control voltage end through a resistance, and is connected to power source supply end through another resistance.
5, the fan electromotor of two section type rotating speed control as claimed in claim 3 is characterized in that: be provided with in the buffer circuit by different resistances and control the resistance of fan at the rotating speed of low-speed mode running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00257617 CN2450413Y (en) | 2000-10-26 | 2000-10-26 | Two-stage rotating speed controlled fan motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00257617 CN2450413Y (en) | 2000-10-26 | 2000-10-26 | Two-stage rotating speed controlled fan motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2450413Y true CN2450413Y (en) | 2001-09-26 |
Family
ID=33614086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00257617 Expired - Lifetime CN2450413Y (en) | 2000-10-26 | 2000-10-26 | Two-stage rotating speed controlled fan motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2450413Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100380340C (en) * | 2005-04-30 | 2008-04-09 | 华硕电脑股份有限公司 | Temperature detecting and control circuit |
| CN100543629C (en) * | 2007-10-29 | 2009-09-23 | 中兴通讯股份有限公司 | A kind of speed-controlling device and the three terminal fan that utilizes this device control speed |
| CN102465909A (en) * | 2010-11-01 | 2012-05-23 | 协禧电机股份有限公司 | Fan rotating speed controlling circuit |
| CN102758786A (en) * | 2011-04-28 | 2012-10-31 | 鸿富锦精密工业（深圳）有限公司 | Fan circuit |
| CN102094839B (en) * | 2009-12-11 | 2013-02-06 | 建准电机工业股份有限公司 | Fan system and stopping control circuit thereof |
| CN103414225A (en) * | 2013-08-14 | 2013-11-27 | 山东润峰电子科技有限公司 | Electric vehicle charger with temperature-control fan |
| CN103982455A (en) * | 2014-05-25 | 2014-08-13 | 姜智康 | Fan temperature control and speed regulation circuit with working points arranged easily |
| CN105465027A (en) * | 2015-12-31 | 2016-04-06 | 苏州壹达生物科技有限公司 | Device for intelligently controlling linear rotating speed of heat radiating fan |
| CN106992726A (en) * | 2016-01-19 | 2017-07-28 | 建准电机工业股份有限公司 | Motor power supply circuit |
-
2000
- 2000-10-26 CN CN 00257617 patent/CN2450413Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100380340C (en) * | 2005-04-30 | 2008-04-09 | 华硕电脑股份有限公司 | Temperature detecting and control circuit |
| CN100543629C (en) * | 2007-10-29 | 2009-09-23 | 中兴通讯股份有限公司 | A kind of speed-controlling device and the three terminal fan that utilizes this device control speed |
| CN102094839B (en) * | 2009-12-11 | 2013-02-06 | 建准电机工业股份有限公司 | Fan system and stopping control circuit thereof |
| CN102465909A (en) * | 2010-11-01 | 2012-05-23 | 协禧电机股份有限公司 | Fan rotating speed controlling circuit |
| CN102465909B (en) * | 2010-11-01 | 2014-12-10 | 协禧电机股份有限公司 | Fan rotating speed controlling circuit |
| CN102758786A (en) * | 2011-04-28 | 2012-10-31 | 鸿富锦精密工业（深圳）有限公司 | Fan circuit |
| CN102758786B (en) * | 2011-04-28 | 2016-03-30 | 赛恩倍吉科技顾问（深圳）有限公司 | Fan circuit |
| CN103414225A (en) * | 2013-08-14 | 2013-11-27 | 山东润峰电子科技有限公司 | Electric vehicle charger with temperature-control fan |
| CN103982455A (en) * | 2014-05-25 | 2014-08-13 | 姜智康 | Fan temperature control and speed regulation circuit with working points arranged easily |
| CN105465027A (en) * | 2015-12-31 | 2016-04-06 | 苏州壹达生物科技有限公司 | Device for intelligently controlling linear rotating speed of heat radiating fan |
| CN106992726A (en) * | 2016-01-19 | 2017-07-28 | 建准电机工业股份有限公司 | Motor power supply circuit |
| CN106992726B (en) * | 2016-01-19 | 2019-11-08 | 建准电机工业股份有限公司 | Motor power supply circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1944856A1 (en) | A power factor correction circuit | |
| CN2450413Y (en) | Two-stage rotating speed controlled fan motor | |
| CN1680727A (en) | Controlling circuit of low-voltage high rotating speed rotation with high-voltage activation for DC fan motor | |
| CN1758525A (en) | DC fan starting circuit | |
| CN1905350A (en) | DC fan starting circuit | |
| CN101473524A (en) | Motor control circuit, fan motor, electronic equipment and notebook-sized personal computer | |
| CN2454987Y (en) | Fan motor of controlling rotational speed by pulse working period | |
| CN1310418C (en) | Controller of step-by-step motor | |
| CN2471984Y (en) | Electric fun motor with frequency speed control | |
| US20070024224A1 (en) | kW-based torque control for AC motors | |
| CN112032088B (en) | Device and method for realizing reverse power generation of air conditioner external fan by controlling rotation of fan | |
| US20020050803A1 (en) | PWM-pulse control system | |
| CN210033927U (en) | Device for realizing reverse power generation of air conditioner external fan by controlling fan rotation | |
| CN200959586Y (en) | Electricity economizer of automatic three-phase motor | |
| CN2731151Y (en) | Temperature controlled fan | |
| US6700764B2 (en) | Integrated power factor correction and MOSFET integrated circuit | |
| CN203023095U (en) | Driving protection circuit and device used for low-voltage direct-current fan of refrigerator | |
| CN2454986Y (en) | Temp.-control speed-changing fan motor | |
| CN1050018C (en) | Power supplier with low-consumption of power | |
| CN2125890U (en) | Induction motor speed governing device for electric vehicle | |
| CN2817211Y (en) | Three-phase asynchronous motor speed regulating controller and air conditioner using same | |
| CN213402861U (en) | Automatic temperature control circulation stall circuit of direct current brushless fan | |
| CN203608134U (en) | Intelligent electricity-saving device of three-phase motor | |
| CN212429262U (en) | Intelligent control device for rotating speed of 3PIN fan | |
| CN1423409A (en) | Motor control device and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Kunshan Guangxing Electronics Co., Ltd. Assignor: Jianzhun Electric Motor Industry Co., Ltd. Contract fulfillment period: In October 26, 2010, the patent expired Contract record no.: 031000030098 Denomination of utility model: Fan motor with two stage speed control Granted publication date: 20010926 License type: General permission Record date: 2003.5.28 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2010.10.26, EXPIRATION OF PATENT RIGHT Name of requester: KUNSHAN GUANGXING ELECTRONICS CO., LTD. Effective date: 20030528 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Kunshan Guangxing Electronics Co., Ltd. Assignor: Jianzhun Electric Motor Industry Co., Ltd. Contract fulfillment period: October 26, 2010 Contract record no.: 031000030098 Denomination of utility model: Fan motor with two stage speed control Granted publication date: 20010926 License type: General permission Record date: 20030528 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2010.10.26 Name of requester: KUNSHAN GUANGXING ELECTRONICS CO., LTD. Effective date: 20030528 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20101026 Granted publication date: 20010926 |