CN102913470B - Fan rotating speed control circuit - Google Patents
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Abstract
一种风扇转速控制电路，包含一控速驱动单元及一调速单元。该控速驱动单元具有一驱动元件、一定子驱动端口及一电源/信号传输端口，该定子驱动端口连接该驱动元件并输出该驱动元件产生的驱动电流，该电源/信号传输端口连接该驱动元件且具有一高电平端及一接地端。该调速单元具有一第一分压元件及一第二分压元件串联连接于该高电平端及接地端之间，该第一及第二分压元件之间的串联接点形成一电压输出端口电连接至该驱动元件，该调速单元另具有一调速电阻，该调速电阻的第一端点连接该电压输出端口，该调速电阻的第二端点能够连接至该高电平端、接地端或浮接。即可轻易且迅速的改变设有本发明的风扇转速控制电路的风扇马达的转速。
A fan speed control circuit includes a speed control drive unit and a speed regulating unit. The speed control drive unit has a drive element, a stator drive port and a power/signal transmission port. The stator drive port is connected to the drive element and outputs the drive current generated by the drive element. The power/signal transmission port is connected to the drive element. And has a high level terminal and a ground terminal. The speed control unit has a first voltage dividing element and a second voltage dividing element connected in series between the high level terminal and the ground terminal. The series connection point between the first and second voltage dividing elements forms a voltage output port. Electrically connected to the driving element, the speed regulating unit also has a speed regulating resistor, the first endpoint of the speed regulating resistor is connected to the voltage output port, and the second endpoint of the speed regulating resistor can be connected to the high level end and ground. terminal or floating. The speed of the fan motor equipped with the fan speed control circuit of the present invention can be easily and quickly changed.
Description
技术领域 technical field
本发明是关于一种风扇转速控制电路，尤其是一种可供使用者迅速便捷的调整转速，并易于微型化的风扇转速控制电路。The invention relates to a fan speed control circuit, in particular to a fan speed control circuit which can be quickly and conveniently adjusted by the user and is easy to be miniaturized.
背景技术 Background technique
请参照图1所示，其为中国台湾发明I302400号《马达转速控制装置》专利案所揭示的现有转速控制电路。该现有转速控制电路包含一驱动元件91、一调速单元92及一定子绕组93。该驱动元件91具有一电压调控端911连接于该调速单元92，且该驱动元件91另具有一定子驱动端口912连接于该定子绕组93，其中该驱动元件91是根据该电压调控端911的电压电平由该定子驱动端口912输出电流至该定子绕组93，以驱动一转子依对应于该电压调控端911的电压电平的速度运转。详言之，该调速单元92是由串接于一电源及一接地点之间的一分压电阻921及一调变电阻922所构成，且该二电阻921、922之间的串接点连接至该驱动元件91的电压调控端911，其中该调变电阻922为一温控电阻。Please refer to FIG. 1 , which is the existing speed control circuit disclosed in Taiwan Invention No. I302400 "Motor Speed Control Device". The existing speed control circuit includes a driving element 91 , a speed regulating unit 92 and a stator winding 93 . The driving element 91 has a voltage regulating terminal 911 connected to the speed regulating unit 92, and the driving element 91 also has a stator driving port 912 connected to the stator winding 93, wherein the driving element 91 is based on the voltage regulating terminal 911 The voltage level is output from the stator driving port 912 to the stator winding 93 to drive a rotor to run at a speed corresponding to the voltage level of the voltage regulating terminal 911 . Specifically, the speed regulating unit 92 is composed of a voltage dividing resistor 921 and a modulating resistor 922 connected in series between a power supply and a grounding point, and the series connection point between the two resistors 921 and 922 is connected To the voltage regulating terminal 911 of the driving element 91, wherein the modulating resistor 922 is a temperature controlling resistor.
当上述的现有转速控制电路进行运作时，该调变电阻922可供改变其本身的电阻值，借此改变该电源通过该分压电阻921及调变电阻922以分压方式在该串接点形成的电压，进而调整该电压调控端911的电压电平，达到改变该转子转速的目的。When the above-mentioned existing speed control circuit is in operation, the modulating resistor 922 can change its own resistance value, thereby changing the power supply through the voltage dividing resistor 921 and modulating resistor 922 in the series connection point. The formed voltage further adjusts the voltage level of the voltage regulating terminal 911 to achieve the purpose of changing the rotor speed.
然而，由于该调变电阻922为一温控电阻，故该现有转速控制电路仅能依照该温变电阻所测得的环境温度调整该转子的转速，无法供使用者依其他需求自行改变转子转速，且就风扇马达的供应厂商而言，也无法以单一驱动电路满足不同购买者个别的驱风转速的需求；此外，即使以一般的旋钮式可变电阻作为该调变电阻922，虽可供使用者依需求自行调整该调变电阻922的电阻值，但由于一般的旋钮式可变电阻均具有较大体积，因此将使设有此转速控制电路的马达/风扇难以进一步微型化。However, since the modulating resistor 922 is a temperature control resistor, the existing speed control circuit can only adjust the speed of the rotor according to the ambient temperature measured by the temperature changing resistor, and cannot allow the user to change the rotor according to other requirements. Speed, and as far as the supplier of the fan motor is concerned, it is impossible to meet the individual needs of different buyers for the individual wind speed with a single drive circuit; The resistance value of the variable resistor 922 can be adjusted by the user according to the requirement. However, since the general knob-type variable resistor has a large volume, it is difficult to further miniaturize the motor/fan equipped with the speed control circuit.
基于上述原因，有必要进一步改良上述现有转速控制电路，以期能够达成供使用者迅速便捷的调整转速、降低制造商的电路设计成本，并便于进行风扇微型化设计的功效。Based on the above reasons, it is necessary to further improve the above-mentioned existing speed control circuit, in order to achieve the effect of quickly and conveniently adjusting the speed for the user, reducing the manufacturer's circuit design cost, and facilitating the miniaturization design of the fan.
发明内容 Contents of the invention
本发明主要目的提供一种风扇转速控制电路，可供使用者轻易且迅速的改变设有该风扇转速控制电路的风扇马达的转速，具有便于调整驱动电流及降低电路设计成本的功效。The main purpose of the present invention is to provide a fan speed control circuit, which can easily and quickly change the speed of the fan motor equipped with the fan speed control circuit, which has the effect of facilitating the adjustment of the driving current and reducing the cost of circuit design.
本发明的另一目的提供一种风扇转速控制电路，由精简的电路完成且仅改变微型短路器的连接位置即可改变调速电压的电压电平，具有利于微型化设计的功效。Another object of the present invention is to provide a fan speed control circuit, which is completed by a simplified circuit and the voltage level of the speed regulation voltage can be changed only by changing the connection position of the miniature short circuit, which is beneficial to miniaturization design.
根据本发明的风扇转速控制电路，包含一控速驱动单元及一调速单元。该控速驱动单元具有一驱动元件、一定子驱动端口及一电源/信号传输端口，该定子驱动端口连接该驱动元件并输出该驱动元件产生的驱动电流，该电源/信号传输端口连接该驱动元件且具有一高电平端及一接地端。该调速单元具有一第一分压元件及一第二分压元件，该第一分压元件与第二分压元件串联连接形成一串联电路，该串联电路连接于该高电平端及接地端之间，该第一及第二分压元件之间的串联接点形成一电压输出端口电连接至该驱动元件，该调速单元另具有一调速电阻，该调速电阻的第一端点连接该电压输出端口，该调速电阻的第二端点能够连接至该高电平端、接地端或浮接。The fan speed control circuit according to the present invention includes a speed control drive unit and a speed regulation unit. The speed control drive unit has a drive element, a stator drive port and a power/signal transmission port, the stator drive port is connected to the drive element and outputs the drive current generated by the drive element, the power supply/signal transmission port is connected to the drive element And it has a high level terminal and a ground terminal. The speed regulating unit has a first voltage dividing element and a second voltage dividing element, the first voltage dividing element and the second voltage dividing element are connected in series to form a series circuit, and the series circuit is connected to the high level end and the ground end Between, the series connection between the first and second voltage dividing elements forms a voltage output port electrically connected to the drive element, the speed regulating unit also has a speed regulating resistor, the first terminal of the speed regulating resistor is connected to The voltage output port, the second terminal of the speed regulating resistor can be connected to the high level terminal, ground terminal or floating connection.
所述第一分压元件及第二分压元件各由一电阻器所构成。Each of the first voltage dividing element and the second voltage dividing element is composed of a resistor.
所述第一分压元件及第二分压元件之中的至少一个由数个电阻器串联组成。At least one of the first voltage dividing element and the second voltage dividing element is composed of several resistors connected in series.
所述数个电阻器具有不同的电阻值。The plurality of resistors have different resistance values.
所述调速单元另具有一滤波电容与该第一分压元件并联连接。The speed regulating unit further has a filter capacitor connected in parallel with the first voltage dividing element.
所述调速电阻的第二端点通过一个微型短路器连接至该高电平端或接地端。The second end of the speed regulating resistor is connected to the high level end or the ground end through a miniature short circuit.
所述调速电阻的第二端点通过一个拨动开关连接至该高电平端或接地端。The second terminal of the speed regulating resistor is connected to the high level terminal or the ground terminal through a toggle switch.
本发明有益效果在于，仅借助改变该调速电阻的第二端点与该二分压元件之间的连接关系，使用者即可轻易且迅速的改变设有本发明的风扇转速控制电路的风扇马达的转速；同时，更由于该调速单元的设计极为精简，且仅改变微型短路器的连接位置即可完成上述连接关系，因此本发明的风扇转速控制电路亦有利于应用在微型化的风扇中。The beneficial effect of the present invention is that, only by changing the connection relationship between the second terminal of the speed regulating resistor and the two voltage divider elements, the user can easily and quickly change the fan motor provided with the fan speed control circuit of the present invention. At the same time, because the design of the speed regulating unit is extremely simple, and the above connection relationship can be completed only by changing the connection position of the miniature short circuit, the fan speed control circuit of the present invention is also beneficial to be applied in miniaturized fans .
附图说明 Description of drawings
图1：现有转速控制电路的电路图。Figure 1: Circuit diagram of an existing speed control circuit.
图2：本发明风扇转速控制电路的第一实施例的电路图。Fig. 2: The circuit diagram of the first embodiment of the fan speed control circuit of the present invention.
图3：本发明风扇转速控制电路的第二实施例的电路图。Fig. 3: The circuit diagram of the second embodiment of the fan speed control circuit of the present invention.
【主要元件符号说明】[Description of main component symbols]
〔本发明〕〔this invention〕
1控速驱动单元 11驱动元件1 Speed control drive unit 11 Drive components
12电源/信号传输端口 121高电平端12 power supply/signal transmission port 121 high level terminal
122接地端 123信号传输端122 ground terminal 123 signal transmission terminal
13定子驱动端口 14电压调控端13 Stator drive port 14 Voltage regulation port
15二极管15 diodes
2调速单元 21第一分压元件2 Speed regulating unit 21 The first pressure dividing element
22第二分压元件 23调速电阻22 Second voltage divider element 23 Speed regulating resistor
231第一端点 232第二端点231 first endpoint 232 second endpoint
24电压输出端口 25滤波电容24 voltage output port 25 filter capacitor
L定子绕组L stator winding
〔现有〕〔existing〕
91驱动元件 911电压调控端91 drive element 911 voltage regulation terminal
912定子驱动端口912 stator drive port
92调速单元 921分压电阻92 speed control unit 921 voltage divider resistor
922调变电阻922 modulating resistor
93定子绕组93 stator winding
具体实施方式 Detailed ways
为让本发明的上述及其他目的、特征及优点能更明显易懂，下文特举本发明的较佳实施例，并配合所附图式，作详细说明如下：In order to make the above-mentioned and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention are specifically cited below, together with the accompanying drawings, and are described in detail as follows:
请参照图2所示，其绘示本发明的风扇转速控制电路的第一实施例，且该风扇转速控制电路供连接并控制一风扇马达的定子绕组L内的驱动电流，以驱动该风扇马达进行运转。该风扇转速控制电路包含一控速驱动单元1及一调速单元2，其中该控速驱动单元1连接该定子绕组L，而该调速单元2连接该控速驱动单元1，且该调速单元2可输出一调速电压，以供该控速驱动单元1对应于该调速单元2的调速电压输出该驱动电流。Please refer to FIG. 2, which shows the first embodiment of the fan speed control circuit of the present invention, and the fan speed control circuit is used to connect and control the driving current in the stator winding L of a fan motor to drive the fan motor. run. The fan speed control circuit includes a speed control drive unit 1 and a speed control unit 2, wherein the speed control drive unit 1 is connected to the stator winding L, and the speed control unit 2 is connected to the speed control drive unit 1, and the speed control The unit 2 can output a speed regulation voltage for the speed control drive unit 1 to output the driving current corresponding to the speed regulation voltage of the speed regulation unit 2 .
请再参照图2所示，该控速驱动单元1包含一驱动元件11、一电源/信号传输端口12、一定子驱动端口13及一电压调控端14。该驱动元件11较佳为一驱动IC；该电源/信号传输端口12供连接至一外部电路(未绘示)且与该驱动元件11电连接，以便该控速驱动单元1及调速单元2借助该电源/信号传输端口12自该外部电路接收一直流电源及接地，其中该电源/信号传输端口12具有一高电平端121供接收该直流电源，且该电源/信号传输端口12具有一接地端122用以接地，或者该电源/信号传输端口12更可另具有一信号传输端123，以将该驱动元件11所产生的转速检出讯号送至该外部电路；该定子驱动端口13供连接至该定子绕组L且与该驱动元件11电连接，以便将该驱动元件11所产生的驱动电流送至该定子绕组L；该电压调控端14连接于该驱动元件11及调速单元2，以便接收该调速单元2所输出的调速电压并送至该驱动元件11。Referring to FIG. 2 again, the speed control drive unit 1 includes a drive element 11 , a power/signal transmission port 12 , a stator drive port 13 and a voltage regulation terminal 14 . The driving element 11 is preferably a driving IC; the power supply/signal transmission port 12 is for connecting to an external circuit (not shown) and is electrically connected with the driving element 11, so that the speed control driving unit 1 and the speed regulating unit 2 Receive a DC power supply and ground from the external circuit by means of the power supply/signal transmission port 12, wherein the power supply/signal transmission port 12 has a high level terminal 121 for receiving the DC power supply, and the power supply/signal transmission port 12 has a ground connection The terminal 122 is used for grounding, or the power supply/signal transmission port 12 can also have a signal transmission terminal 123, so as to send the speed detection signal generated by the drive element 11 to the external circuit; the stator drive port 13 is used for connecting To the stator winding L and electrically connected to the driving element 11, so that the driving current generated by the driving element 11 is sent to the stator winding L; the voltage regulation terminal 14 is connected to the driving element 11 and the speed regulating unit 2, so that The speed regulating voltage output by the speed regulating unit 2 is received and sent to the driving element 11 .
该调速单元2具有一第一分压元件21、一第二分压元件22及一调速电阻23。在本实施例中，该第一分压元件21及第二分压元件22各由一电阻器所构成，且该第一分压元件21及第二分压元件22串联连接形成一串联电路，该串联电路连接于该高电平端121及接地端122之间，其中该二分压元件21、22之间的串联接点形成一电压输出端口24连接至该电压调控端14，以便以该电压输出端口24的电压作为该调速电压，并通过该电压调控端14将该调速电压送至该驱动元件11。该调速电阻23具有一第一端点231及一第二端点232，该第一端点231连接该电压输出端口24，而该第二端点232则可连接至该高电平端121、接地端122或浮接(floating)。The speed regulating unit 2 has a first voltage dividing element 21 , a second voltage dividing element 22 and a speed regulating resistor 23 . In this embodiment, each of the first voltage dividing element 21 and the second voltage dividing element 22 is composed of a resistor, and the first voltage dividing element 21 and the second voltage dividing element 22 are connected in series to form a series circuit, The series circuit is connected between the high-level terminal 121 and the ground terminal 122, wherein the series connection between the two voltage divider elements 21, 22 forms a voltage output port 24 connected to the voltage regulation terminal 14, so as to output The voltage at port 24 is used as the speed regulation voltage, and the speed regulation voltage is sent to the driving element 11 through the voltage regulation terminal 14 . The speed regulating resistor 23 has a first end point 231 and a second end point 232, the first end point 231 is connected to the voltage output port 24, and the second end point 232 can be connected to the high level end 121, the ground end 122 or floating.
当本发明的风扇转速控制电路借助该驱动元件11接收该直流电源驱动该风扇马达时，该调速电阻23的第二端点232的连接状态可决定该电压输出端口24的电压电平(即该调速电压)，以供该驱动元件11对应于该调速电压控制该定子绕组L内的驱动电流，进而调整该风扇马达的转速。详言之，当该第二端点232为浮接时，该调速电压为该直流电源的电压以该第一分压元件21及该第二分压元件22所形成的分压；当该第二端点232连接该高电平端121时，该调速电压为该直流电源的电压以一并联电路及该第二分压元件22所形成的分压，其中该并联电路由该第一分压元件21及该调速电阻23并联形成，且此时该调速电压的电压电平高于该第二端点232浮接时的调速电压的电压电平；当该第二端点232连接该接地端122时，该调速电压为该直流电源的电压以该第一分压元件21及另一并联电路所形成的分压，此一并联电路由该第二分压元件22及该调速电阻23并联形成，且此时该调速电压的电压电平低于该第二端点232浮接时的调速电压的电压电平。因此，该调速单元2可由该电压输出端口24送出数种不同的电压电平作为该调速电压，该驱动单元11即可通过该电压调控端14接收此数种不同电平的电压而驱动该风扇马达以不同的转速运转。另，借助设计该第一分压元件21、第二分压元件22及调速电阻23的电阻值，更可规划该风扇马达对应于该数种电压电平的转速与其额定转速的关系，例如：当该第二端点232连接该高电平端121时，该风扇马达的转速为其额定转速的100％；当该当该第二端点232为浮接时，该风扇马达的转速为其额定转速的90％；而当该第二端点232连接该接地端122时，该风扇马达的转速为其额定转速的80％。When the fan speed control circuit of the present invention receives the DC power to drive the fan motor through the drive element 11, the connection state of the second terminal 232 of the speed regulating resistor 23 can determine the voltage level of the voltage output port 24 (that is, the Speed regulating voltage) for the driving element 11 to control the driving current in the stator winding L corresponding to the speed regulating voltage, so as to adjust the speed of the fan motor. In detail, when the second terminal 232 is floating, the speed regulation voltage is the divided voltage formed by the voltage of the DC power supply and the first voltage dividing element 21 and the second voltage dividing element 22; When the two terminals 232 are connected to the high-level terminal 121, the speed regulation voltage is the voltage of the DC power supply formed by a parallel circuit and the second voltage dividing element 22, wherein the parallel circuit is composed of the first voltage dividing element 21 and the speed regulating resistor 23 are formed in parallel, and at this time the voltage level of the speed regulating voltage is higher than the voltage level of the speed regulating voltage when the second terminal 232 is floating; when the second terminal 232 is connected to the ground terminal When 122, the speed regulation voltage is the voltage division formed by the voltage of the DC power supply and the first voltage dividing element 21 and another parallel circuit, and this parallel circuit is composed of the second voltage dividing element 22 and the speed regulating resistor 23 The parallel connection is formed, and the voltage level of the speed regulation voltage at this moment is lower than the voltage level of the speed regulation voltage when the second terminal 232 is floating. Therefore, the speed regulating unit 2 can send several different voltage levels from the voltage output port 24 as the speed regulating voltage, and the drive unit 11 can receive the voltages of several different levels through the voltage regulating terminal 14 to drive The fan motors run at different speeds. In addition, by designing the resistance values of the first voltage dividing element 21, the second voltage dividing element 22 and the speed regulating resistor 23, the relationship between the speed of the fan motor corresponding to the several voltage levels and its rated speed can be planned, for example : when the second terminal 232 is connected to the high-level terminal 121, the fan motor rotates at 100% of its rated rotation speed; when the second terminal 232 is floating, the fan motor rotates at its rated rotation speed 90%; and when the second terminal 232 is connected to the ground terminal 122, the fan motor rotates at 80% of its rated rotational speed.
此外，该调速单元2更可另设有一滤波电容25与该第一分压元件21并联，因此一旦由该高电平端121所输入的直流电源中存在电压变化，该滤波电容25即可加以去除，进而避免该电压变化通过该调速单元2及电压调控端14进入该驱动元件11而造成毁损。另，也可另设有一二极体15连接于该高电平端121及驱动元件11之间，以便在不慎将该电源/信号传输端口12与该外部电路反向连接(即该高电平端121接地，而该接地端122接收该直流电源)时，可避免逆向电流破坏该驱动元件11，借以达成反向极性保护的目的。In addition, the speed control unit 2 can further have a filter capacitor 25 connected in parallel with the first voltage dividing element 21, so once there is a voltage change in the DC power input from the high-level terminal 121, the filter capacitor 25 can be adjusted. removed, thereby preventing the voltage change from entering the driving element 11 through the speed regulating unit 2 and the voltage regulating terminal 14 and causing damage. In addition, a diode 15 may also be provided to be connected between the high level terminal 121 and the driving element 11, so that the power supply/signal transmission port 12 may be reversely connected to the external circuit (that is, the high level terminal 12 may be connected to the external circuit inadvertently). When the flat terminal 121 is grounded and the ground terminal 122 receives the DC power supply), reverse current can be prevented from damaging the drive element 11, so as to achieve the purpose of reverse polarity protection.
借助上述电路构造，本发明的风扇转速控制电路可供使用者自行依需求改变该风扇马达的转速，也可供风扇马达的供应厂商以本发明的风扇转速控制电路驱动同一种风扇马达，即能够满足不同购买者个别的驱风转速的需求。此外，由于使用者仅需要以现有的微型短路器(Jumper)、拨动开关(DIP switch)等元件连接该调速电阻23的第二端点232至该高电平端121、接地端122或浮接，因此可以大幅减少本发明的风扇转速控制电路为达成转速调整功能所需要的设置空间，进而便于为设有该风扇转速控制电路的风扇进行微型化设计。With the help of the above circuit structure, the fan speed control circuit of the present invention can be used by the user to change the speed of the fan motor according to the demand, and can also be used by the supplier of the fan motor to drive the same fan motor with the fan speed control circuit of the present invention, that is, it can To meet the needs of different buyers for individual drive wind speed. In addition, since the user only needs to connect the second terminal 232 of the speed regulating resistor 23 to the high level terminal 121, the ground terminal 122 or the floating Therefore, the installation space required by the fan speed control circuit of the present invention to achieve the speed adjustment function can be greatly reduced, thereby facilitating the miniaturization design of the fan provided with the fan speed control circuit.
请参照图3所示，其绘示本发明的风扇转速控制电路的第二实施例，其与前述的第一实施例的风扇转速控制电路的差异主要在于，该第一分压元件21及第二分压元件22的其中至少一个可由数个串联的电阻器所组成，且该第一分压元件21或第二分压元件22的数个电阻器具有不同的电阻值。借此，该调速电阻23的第二端点232不仅可连接至该高电平端121、接地端122或浮接，亦可连接至该第一分压元件21或第一分压元件22中的任二相邻电阻器之间的串联接点，借此可在该电压输出端口24形成更多种不同的电压电平作为该调速电压，以供该风扇马达以更多种不同的转速运转。Please refer to FIG. 3 , which shows the second embodiment of the fan speed control circuit of the present invention. The main difference between it and the fan speed control circuit of the first embodiment is that the first voltage dividing element 21 and the second At least one of the two voltage dividing elements 22 may be composed of several resistors connected in series, and the resistors of the first voltage dividing element 21 or the second voltage dividing element 22 have different resistance values. In this way, the second terminal 232 of the speed regulating resistor 23 can not only be connected to the high level terminal 121, the ground terminal 122 or floating, but also can be connected to the first voltage dividing element 21 or the first voltage dividing element 22. The series connection between any two adjacent resistors can form more different voltage levels at the voltage output port 24 as the speed regulating voltage for the fan motor to operate at more different speeds.
综上所述，仅借助改变该调速电阻23的第二端点232与该二分压元件21、22之间的连接关系，使用者即可轻易且迅速的改变设有本发明的风扇转速控制电路的风扇马达的转速；同时，更由于该调速单元2的设计极为精简，且仅改变微型短路器的连接位置即可完成上述连接关系，因此本发明的风扇转速控制电路亦有利于应用在微型化的风扇中。To sum up, only by changing the connection relationship between the second terminal 232 of the speed regulating resistor 23 and the two voltage dividing elements 21, 22, the user can easily and quickly change the speed control function of the fan provided with the present invention. The speed of the fan motor of the circuit; at the same time, because the design of the speed regulating unit 2 is extremely simple, and only changing the connection position of the miniature short circuit can complete the above connection relationship, so the fan speed control circuit of the present invention is also beneficial to be applied in miniaturized fans.
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
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| TW100127609A TWI472147B (en) | 2011-08-03 | 2011-08-03 | Fan speed control circuit |
| TW100127609 | 2011-08-03 |
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| CN102913470A CN102913470A (en) | 2013-02-06 |
| CN102913470B true CN102913470B (en) | 2015-09-02 |
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| CN2011203009298U Expired - Fee Related CN202251000U (en) | 2011-08-03 | 2011-08-18 | Fan rotating speed control circuit |
| CN201110237327.7A Active CN102913470B (en) | 2011-08-03 | 2011-08-18 | Fan rotating speed control circuit |
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| TWI472147B (en) * | 2011-08-03 | 2015-02-01 | Sunonwealth Electr Mach Ind Co | Fan speed control circuit |
| CN104675731B (en) * | 2013-11-29 | 2016-12-21 | 青岛玉兰祥商务服务有限公司 | Fan test circuit |
| CN104485857B (en) * | 2014-08-21 | 2017-09-15 | 株洲中车时代电气股份有限公司 | A kind of fan speed regulating circuit, method, system and its application |
| TWI571044B (en) | 2015-04-23 | 2017-02-11 | 旺玖科技股份有限公司 | High Voltage Protection System |
| DE102017223266A1 (en) * | 2017-07-18 | 2019-01-24 | BSH Hausgeräte GmbH | Dishwasher with at least one air drying device |
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- 2011-08-03 TW TW100127609A patent/TWI472147B/en active
- 2011-08-18 CN CN2011203009298U patent/CN202251000U/en not_active Expired - Fee Related
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| US6329727B1 (en) * | 2000-02-08 | 2001-12-11 | Adc Telecommunications, Inc. | Power supply controller |
| US6239991B1 (en) * | 2000-08-21 | 2001-05-29 | Nidec America Corporation | Control circuit compensating for malfunction of pulse width modulation circuitry |
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| TWI472147B (en) | 2015-02-01 |
| TW201308875A (en) | 2013-02-16 |
| CN202251000U (en) | 2012-05-30 |
| CN102913470A (en) | 2013-02-06 |
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