TWI680639B - Drive integrated circuit for stepless speed change of AC fan motor - Google Patents
Drive integrated circuit for stepless speed change of AC fan motor Download PDFInfo
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Abstract
一種驅動積體電路包含感測單元、控制單元、脈寬調變單元、升壓單元及驅動單元。該感測單元感測一交流風扇馬達並產生一指示該交流風扇馬達當前轉速的感測輸出，該控制單元包括一查找表，該查找表含有多個轉速差值及多個分別對應該等轉速差值的控制信號，該控制單元根據一指示一目標轉速的輸入信號、該感測輸出及該查找表，產生一轉速控制信號，該脈寬調變單元根據該轉速控制信號產生一調變信號，該升壓單元對該調變信號進行升壓以產生一升壓信號，該驅動單元根據該升壓信號產生一相關於該目標轉速的驅動信號並輸出至該交流風扇馬達。 A driving integrated circuit includes a sensing unit, a control unit, a pulse width modulation unit, a boosting unit, and a driving unit. The sensing unit senses an AC fan motor and generates a sensing output indicating the current speed of the AC fan motor. The control unit includes a lookup table containing a plurality of speed differences and a plurality of corresponding speeds respectively. The difference control signal, the control unit generates a speed control signal according to an input signal indicating a target speed, the sensing output and the look-up table, and the pulse width modulation unit generates a modulation signal according to the speed control signal The boosting unit boosts the modulation signal to generate a boosting signal, and the driving unit generates a driving signal related to the target speed according to the boosting signal and outputs the driving signal to the AC fan motor.
Description
本發明是有關於一種驅動積體電路，特別是指一種用於驅動交流風扇馬達無段變速的驅動積體電路。 The invention relates to a driving integrated circuit, in particular to a driving integrated circuit for driving an AC fan motor with stepless speed change.
現有技術主要是利用習知變頻驅動裝置接收來自一個電源的一個電源信號，並藉由一種變頻驅動技術來控制一個交流馬達的轉速。詳細來說，習知變頻驅動裝置包含一個控制單元、一個驅動單元及其他相關單元。該控制單元用來根據一個外部轉速指令產生一個控制信號，該轉速指令指示一個目標轉速。該驅動單元電連接在該電源與該控制單元間，並根據該控制信號及該電源信號產生一個頻率及電壓已調整的驅動信號，該驅動信號相關於該目標轉速。習知變頻驅動裝置將該驅動信號輸出至該交流馬達，使得該交流馬達根據該驅動信號而轉動並驅動一個風扇以該目標轉速旋轉，以使得該風扇產生所欲風量。 In the prior art, a conventional variable frequency drive device is used to receive a power signal from a power source, and a variable frequency drive technology is used to control the speed of an AC motor. In detail, the conventional variable frequency drive device includes a control unit, a drive unit and other related units. The control unit is used to generate a control signal according to an external speed command, and the speed command indicates a target speed. The driving unit is electrically connected between the power source and the control unit, and generates a driving signal whose frequency and voltage are adjusted according to the control signal and the power signal, and the driving signal is related to the target speed. The conventional variable frequency drive device outputs the driving signal to the AC motor, so that the AC motor rotates according to the driving signal and drives a fan to rotate at the target rotation speed, so that the fan generates a desired air volume.
然而，在習知變頻驅動裝置中，該控制單元及該驅動單元被設計在二個分開的積體電路，導致習知變頻驅動裝置的電路 面積較大且所需製造成本較高。因此，習知變頻驅動裝置仍有改進的空間。 However, in the conventional variable frequency drive device, the control unit and the drive unit are designed in two separate integrated circuits, resulting in the circuit of the conventional variable frequency drive device. Large area and high manufacturing cost. Therefore, there is still room for improvement in the conventional variable frequency drive device.
因此，本發明之目的，即在提供一種能夠克服先前技術缺點的驅動積體電路。 Therefore, an object of the present invention is to provide a driving integrated circuit capable of overcoming the disadvantages of the prior art.
於是，本發明驅動積體電路適用於接收來自一個電源的一個電源信號並據以產生一個驅動信號來驅動一個交流風扇馬達無段變速。該驅動積體電路包含一個感測單元、一個控制單元、一個脈寬調變單元、一個升壓單元，及一個驅動單元。 Therefore, the driving integrated circuit of the present invention is suitable for receiving a power signal from a power source and generating a driving signal to drive an AC fan motor for stepless speed change. The driving integrated circuit includes a sensing unit, a control unit, a pulse width modulation unit, a boosting unit, and a driving unit.
該感測單元感測該交流風扇馬達並產生一個感測輸出，該感測輸出指示該交流風扇馬達當前轉速及該交流風扇馬達的一個轉子位置。 The sensing unit senses the AC fan motor and generates a sensing output, the sensing output indicates the current speed of the AC fan motor and a rotor position of the AC fan motor.
該控制單元接收一個指示一個目標轉速的輸入信號，並電連接該感測單元以接收該感測輸出，該控制單元包括一個儲存一個查找表的儲存模組，該查找表含有多個轉速差值及多個分別對應該等轉速差值的控制信號，該控制單元根據該輸入信號、該感測輸出及該查找表，產生一個相關於該目標轉速的轉速控制信號，該轉速控制信號為該等控制信號中的一者。 The control unit receives an input signal indicating a target speed, and is electrically connected to the sensing unit to receive the sensing output. The control unit includes a storage module storing a look-up table containing a plurality of speed difference values. And a plurality of control signals corresponding to the difference in speed, the control unit generates a speed control signal related to the target speed according to the input signal, the sensing output, and the lookup table, and the speed control signal is One of the control signals.
該脈寬調變單元電連接該控制單元以接收該轉速控制信號，並根據該轉速控制信號產生一個電壓大小已調整的調變信號，且該調變信號的脈波寬度隨該轉速控制信號的變化而改變。 The pulse width modulation unit is electrically connected to the control unit to receive the speed control signal, and generates a modulation signal whose voltage is adjusted according to the speed control signal, and the pulse width of the modulation signal varies with the speed control signal. Change and change.
該升壓單元電連接該脈寬調變單元以接收該調變信號，並對該調變信號進行升壓，以產生一個升壓信號。 The boosting unit is electrically connected to the pulse width modulation unit to receive the modulation signal, and boosts the modulation signal to generate a boosted signal.
該驅動單元電連接在該升壓單元與該交流風扇馬達間，且接收來自該升壓單元之該升壓信號，並根據該升壓信號產生該相關於該目標轉速的驅動信號，且將該驅動信號輸出至該交流風扇馬達，該驅動單元為一個耐高壓規格的單元。 The driving unit is electrically connected between the boosting unit and the AC fan motor, and receives the boosting signal from the boosting unit, and generates the driving signal related to the target speed according to the boosting signal, and The driving signal is output to the AC fan motor, and the driving unit is a high-voltage-resistant unit.
本發明之功效在於：該感測單元、該控制單元、該脈寬調變單元、該升壓單元，及該驅動單元被整合在單一個該驅動積體電路中，以致本實施例該驅動積體電路具有較小的電路面積且所需製造成本較低。 The effect of the present invention is that the sensing unit, the control unit, the pulse width modulation unit, the boosting unit, and the driving unit are integrated into a single driving integrated circuit, so that the driving The bulk circuit has a smaller circuit area and requires lower manufacturing costs.
11‧‧‧電源 11‧‧‧ Power
12‧‧‧交流風扇馬達 12‧‧‧AC fan motor
121‧‧‧轉子 121‧‧‧rotor
2‧‧‧感測單元 2‧‧‧sensing unit
20‧‧‧驅動積體電路 20‧‧‧Drive integrated circuit
3‧‧‧控制單元 3‧‧‧control unit
31‧‧‧儲存模組 31‧‧‧Storage Module
311‧‧‧查找表 311‧‧‧ Lookup Table
4‧‧‧脈寬調變單元 4‧‧‧ Pulse Width Modulation Unit
5‧‧‧升壓單元 5‧‧‧Boost unit
6‧‧‧驅動單元 6‧‧‧Drive unit
61‧‧‧信號切換器 61‧‧‧Signal Switcher
62、63‧‧‧第一及第二電容器 62, 63‧‧‧ first and second capacitors
64‧‧‧二極體 64‧‧‧diode
65、66‧‧‧第一及第二電阻器 65, 66‧‧‧ first and second resistors
67、68‧‧‧第一及第二電晶體 67, 68‧‧‧ first and second transistors
Bs‧‧‧升壓信號 Bs‧‧‧Boost signal
Cs‧‧‧轉速控制信號 Cs‧‧‧speed control signal
Ds‧‧‧驅動信號 Ds‧‧‧ drive signal
Is‧‧‧輸入信號 Is‧‧‧ input signal
Ms‧‧‧調變信號 Ms‧‧‧Modulation signal
P1~P8‧‧‧第一至第八接腳 P1 ~ P8‧‧‧ first to eighth pins
Ss‧‧‧感測輸出 Ss‧‧‧sensing output
VCC‧‧‧電源信號 VCC‧‧‧ Power Signal
VDD‧‧‧偏壓電壓 VDD‧‧‧ bias voltage
本發明之其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中：圖1是一方塊示意圖，說明本發明驅動積體電路之一實施例；及圖2是一電路方塊圖，說明該實施例之一驅動單元。 Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: FIG. 1 is a block diagram illustrating an embodiment of a driving integrated circuit of the present invention; and FIG. 2 is a circuit block FIG. Illustrates a driving unit of this embodiment.
參閱圖1，本發明驅動積體電路20適用於電連接在一個電源11與一個包括一個轉子121的交流風扇馬達12間，接收來自該電源11的一個電源信號VCC並據以產生一個驅動信號Ds來驅動該交流風扇馬達12無段變速。該驅動積體電路20包含一個感測單元2、一個控制單元3、一個脈寬調變單元4、一個升壓單元5，及一個驅動單元6。 Referring to FIG. 1, the driving integrated circuit 20 of the present invention is suitable for being electrically connected between a power source 11 and an AC fan motor 12 including a rotor 121, receiving a power signal VCC from the power source 11 and generating a driving signal Ds accordingly. The AC fan motor 12 is driven to be continuously variable. The driving integrated circuit 20 includes a sensing unit 2, a control unit 3, a pulse width modulation unit 4, a boosting unit 5, and a driving unit 6.
該感測單元2連續地(或定期地)感測該交流風扇馬達12與該轉子121之SN極性變換所產生的信號，以產生一個感測輸出Ss，該感測輸出Ss指示該交流風扇馬達12當前轉速及該交流風扇馬達12之該轉子121的一個轉子位置。在本實施例中，該感測單元2為一個霍爾感測單元。 The sensing unit 2 continuously (or periodically) senses signals generated by the SN polarity change of the AC fan motor 12 and the rotor 121 to generate a sensing output Ss, which indicates the AC fan motor. 12 the current speed and a rotor position of the rotor 121 of the AC fan motor 12. In this embodiment, the sensing unit 2 is a Hall sensing unit.
該控制單元3接收一個指示一個目標轉速的輸入信號Is，並電連接該感測單元2以接收該感測輸出Ss。該控制單元3包括一個儲存一個查找表311的儲存模組31，該查找表311含有多個轉速差值及多個分別對應該等轉速差值的控制信號。該控制單元3根據該輸入信號Is、該感測輸出Ss及該查找表311，產生一個相關於該目標轉速的轉速控制信號Cs，該轉速控制信號Cs為該等控制信號中的一者。詳細來說，該控制單元3先將該輸入信號Is所指示的該目標轉速減掉該感測輸出Ss所指示的該交流風扇馬達12當前轉速，以得到一個當前轉速差值，接著再根據該當前轉速差值自該查 找表311中進行查表比對，且將該等轉速差值中的一個與該當前轉速差值相對應之轉速差值所對應的一個控制信號作為該轉速控制信號Cs。 The control unit 3 receives an input signal Is indicating a target rotational speed, and is electrically connected to the sensing unit 2 to receive the sensing output Ss. The control unit 3 includes a storage module 31 storing a look-up table 311. The look-up table 311 contains a plurality of rotation speed differences and a plurality of control signals corresponding to the rotation speed differences. The control unit 3 generates a speed control signal Cs related to the target speed according to the input signal Is, the sensing output Ss, and the lookup table 311. The speed control signal Cs is one of the control signals. In detail, the control unit 3 first subtracts the target speed indicated by the input signal Is from the current speed of the AC fan motor 12 indicated by the sensing output Ss to obtain a current speed difference, and then calculates a difference based on the current speed. The current speed difference should be checked The look-up table 311 is used to perform a table lookup comparison, and a control signal corresponding to one of the rotation speed difference values corresponding to the current rotation speed difference value is used as the rotation speed control signal Cs.
需說明的是，在本實施例中，該控制單元3為一個可程式控制單元。該輸入信號Is是由一使用者自一使用者輸入介面(圖未示)回應於一對應該目標轉速的輸入操作而產生，也就是說，該使用者可任意調整該目標轉速，而根據該輸入信號Is產生該驅動信號Ds的該驅動積體電路20可據以驅動該交流風扇馬達12達到無段變速。該查找表311所含有的該等轉速差值及該等控制信號是由該使用者經由一程式設定而預先建立的表格，該使用者可不斷更新該查找表311。該轉速控制信號Cs用來使該交流風扇馬達12提高轉速、降低轉速，或維持轉速。舉例來說，當該當前轉速差值為負數(或正數)時，代表該交流風扇馬達12當前轉速大於(或小於)該目標轉速，該控制單元3根據該當前轉速差值自該查找表311中所得到的該轉速控制信號Cs用來使該交流風扇馬達12降低轉速(或提高轉速)。當該當前轉速差值為零時，代表該交流風扇馬達12當前轉速等於該目標轉速，該控制單元3所產生的該轉速控制信號Cs用來使該交流風扇馬達12維持轉速。 It should be noted that, in this embodiment, the control unit 3 is a programmable control unit. The input signal Is is generated by a user from a user input interface (not shown) in response to a pair of input operations corresponding to a target speed, that is, the user can arbitrarily adjust the target speed, and according to the The driving integrated circuit 20 that generates the driving signal Ds by the input signal Is can drive the AC fan motor 12 to achieve stepless speed change. The rotation speed difference values and the control signals contained in the lookup table 311 are tables established in advance by the user through a program setting, and the user can continuously update the lookup table 311. The speed control signal Cs is used to make the AC fan motor 12 increase the speed, decrease the speed, or maintain the speed. For example, when the current speed difference is negative (or positive), it means that the current speed of the AC fan motor 12 is greater than (or less than) the target speed, and the control unit 3 retrieves from the lookup table 311 according to the current speed difference The speed control signal Cs obtained in the above is used to make the AC fan motor 12 reduce the speed (or increase the speed). When the current speed difference is zero, it means that the current speed of the AC fan motor 12 is equal to the target speed. The speed control signal Cs generated by the control unit 3 is used to maintain the speed of the AC fan motor 12.
該脈寬調變單元4電連接該控制單元3以接收該轉速控制信號Cs，並根據該轉速控制信號Cs產生一個電壓大小已調整的 調變信號Ms(該調變信號Ms的電壓大小為12V)，且該調變信號Ms的脈波寬度隨該轉速控制信號Cs的變化而改變。舉例來說，當該當前轉速差值為負數且該轉速控制信號Cs用來使該交流風扇馬達12降低轉速時，該調變信號Ms的脈波寬度隨該轉速控制信號Cs的變化而變窄。反之，當該當前轉速差值為正數且該轉速控制信號Cs用來使該交流風扇馬達12提高轉速時，則該調變信號Ms的脈波寬度隨該轉速控制信號Cs的變化而變寬。 The pulse width modulation unit 4 is electrically connected to the control unit 3 to receive the speed control signal Cs, and generates a voltage having an adjusted voltage according to the speed control signal Cs. The modulation signal Ms (the voltage of the modulation signal Ms is 12V), and the pulse width of the modulation signal Ms changes with the change of the rotation speed control signal Cs. For example, when the current speed difference is negative and the speed control signal Cs is used to reduce the speed of the AC fan motor 12, the pulse width of the modulation signal Ms becomes narrower as the speed control signal Cs changes. . Conversely, when the current rotation speed difference is a positive number and the rotation speed control signal Cs is used to increase the rotation speed of the AC fan motor 12, the pulse width of the modulation signal Ms becomes wider as the rotation speed control signal Cs changes.
該升壓單元5電連接該脈寬調變單元4以接收該調變信號Ms，並對該調變信號Ms進行升壓，以產生一個升壓信號Bs(該升壓信號Bs的電壓大小為24V~48V)，使得該升壓信號Bs的電壓大小足以驅動該驅動單元6。 The boosting unit 5 is electrically connected to the pulse width modulation unit 4 to receive the modulation signal Ms and boost the modulation signal Ms to generate a boost signal Bs (the voltage of the boost signal Bs is 24V ~ 48V), so that the voltage of the boosted signal Bs is sufficient to drive the driving unit 6.
該驅動單元6電連接在該升壓單元5與該交流風扇馬達12間，且接收來自該升壓單元5之該升壓信號Bs，並根據該升壓信號Bs產生該相關於該目標轉速的驅動信號Ds，且將該驅動信號Ds輸出至該交流風扇馬達12，以致該交流風扇馬達12根據該驅動信號Ds而轉動並驅動一個風扇(圖未示)以該目標轉速旋轉，以使得該風扇產生所欲風量。在本實施例中，該驅動單元6為一個耐高壓規格的單元。該驅動信號Ds的電壓大小為110V或220V，頻率大小為50Hz或60Hz。該驅動單元6可驅動所需功率為20W~90W的高功率交流風扇馬達轉動。 The driving unit 6 is electrically connected between the boosting unit 5 and the AC fan motor 12, and receives the boosting signal Bs from the boosting unit 5, and generates the target speed related to the target speed according to the boosting signal Bs. Driving signal Ds, and outputting the driving signal Ds to the AC fan motor 12, so that the AC fan motor 12 rotates and drives a fan (not shown) to rotate at the target speed according to the driving signal Ds, so that the fan Generate the desired amount of air. In this embodiment, the driving unit 6 is a high-voltage-resistant unit. The voltage of the driving signal Ds is 110V or 220V, and the frequency is 50Hz or 60Hz. The driving unit 6 can drive a high-power AC fan motor with a required power of 20W ~ 90W.
進一步參閱圖2，該驅動單元6包括一個信號切換器61、第一及第二電容器62、63、一個二極體64、第一及第二電阻器65、66，及第一及第二電晶體67、68。 Further referring to FIG. 2, the driving unit 6 includes a signal switcher 61, first and second capacitors 62 and 63, a diode 64, first and second resistors 65 and 66, and first and second power switches. Crystals 67 and 68.
該信號切換器61具有第一至第八接腳P1~P8，該第一接腳P1接收該電源信號VCC，該等第二及第三接腳P2、P3電連接該升壓單元5且相配合接收該升壓信號Bs，該第四接腳P4電連接至地。 The signal switcher 61 has first to eighth pins P1 to P8, the first pin P1 receives the power signal VCC, and the second and third pins P2 and P3 are electrically connected to the booster unit 5 and are connected in phase. In cooperation with receiving the boosted signal Bs, the fourth pin P4 is electrically connected to the ground.
該第一電容器62電連接在該等第一及第四接腳P1、P4間。該第二電容器63電連接在該等第六及第八接腳P6、P8間。該二極體64具有一個電連接該第一接腳P1的陽極，及一個電連接該第八接腳P8的陰極。該第一電阻器65具有一個電連接該第七接腳P7的第一端，及一個第二端。該第二電阻器66具有一個電連接該第五接腳P5的第一端，及一個第二端。該第一電晶體67具有一個接收一偏壓電壓VDD的第一端、一個電連接該第六接腳P6的第二端，及一個電連接該第一電阻器65之該第二端的控制端。該第二電晶體68具有一個第一端、一個電連接至地的第二端，及一個電連接該第二電阻器66之該第二端的控制端。該第二電晶體68的該第一端與該第一電晶體67的該第二端的輸出作為該驅動信號Ds。 The first capacitor 62 is electrically connected between the first and fourth pins P1 and P4. The second capacitor 63 is electrically connected between the sixth and eighth pins P6 and P8. The diode 64 has an anode electrically connected to the first pin P1 and a cathode electrically connected to the eighth pin P8. The first resistor 65 has a first terminal electrically connected to the seventh pin P7 and a second terminal. The second resistor 66 has a first terminal electrically connected to the fifth pin P5 and a second terminal. The first transistor 67 has a first terminal receiving a bias voltage VDD, a second terminal electrically connected to the sixth pin P6, and a control terminal electrically connected to the second terminal of the first resistor 65. . The second transistor 68 has a first terminal, a second terminal electrically connected to the ground, and a control terminal electrically connected to the second terminal of the second resistor 66. Outputs from the first terminal of the second transistor 68 and the second terminal of the first transistor 67 are used as the driving signal Ds.
需說明的是，在本實施例中，該第一電容器62為一個極性電容器，該等第一及第二電阻器65、66各自為一個限流電阻 器。該等第一及第二電晶體67、68各自為一N型金氧半場效電晶體，其中該N型金氧半場效電晶體的汲極、源極及閘極分別為該等第一及第二電晶體67、68中的每一者的該第一端、該第二端及該控制端。此外，該信號切換器61的作用為將其所接收到的該升壓信號Bs經由其自身內部開關進行切換來錯開該升壓信號Bs的時脈，以分成從該第七接腳P7輸出一信號來驅動該第一電晶體67，及從該第五接腳P5輸出另一信號來驅動該第二電晶體68。另外，該信號切換器61經由該第六接腳P6持續偵測該第一電晶體67是正常輸出或遭鎖住，若該第一電晶體67遭鎖住，則該信號切換器61將一重置信號經由該第六接腳P6及該第二電容器63輸出至該第八接腳P8以進行重置。該信號切換器61之細部電路結構具有多種不同的實施態樣且為本領域具通常知識者所熟知，故於此不贅述。 It should be noted that, in this embodiment, the first capacitor 62 is a polar capacitor, and the first and second resistors 65 and 66 are each a current limiting resistor. Device. The first and second transistors 67 and 68 are each an N-type metal-oxide-semiconductor field-effect transistor, and the drain, source, and gate of the N-type metal-oxide-semiconductor half-effect transistor are the first and The first terminal, the second terminal, and the control terminal of each of the second transistors 67, 68. In addition, the function of the signal switcher 61 is to switch the boosted signal Bs it receives via its own internal switch to stagger the clock of the boosted signal Bs, so as to divide it into an output from the seventh pin P7. Signal to drive the first transistor 67, and output another signal from the fifth pin P5 to drive the second transistor 68. In addition, the signal switcher 61 continuously detects that the first transistor 67 is normally output or locked through the sixth pin P6. If the first transistor 67 is locked, the signal switcher 61 will The reset signal is output to the eighth pin P8 via the sixth pin P6 and the second capacitor 63 for resetting. The detailed circuit structure of the signal switcher 61 has a variety of different implementations and is well known to those having ordinary knowledge in the art, so it will not be repeated here.
綜上所述，由於該感測單元2、該控制單元3、該脈寬調變單元4、該升壓單元5，及該驅動單元6是被整合在單一個該驅動積體電路20中，如此一來，該驅動積體電路20相較於習知變頻驅動裝置具有較小的電路面積，且所需製造成本較低。此外，由於該感測單元2連續地感測該交流風扇馬達12所得到的該感測輸出Ss可得知該交流風扇馬達12當前轉速及該轉子121的轉子位置，因此該驅動積體電路20根據該感測輸出Ss所產生的該驅動信號Ds可使該交流風扇馬達12中的電晶體(圖未示)達到零點切換，進而該 交流風扇馬達12不會產生反變電動勢給該驅動單元6，如此可避免該驅動單元6因反變電動勢而損壞，使得本實施例該驅動積體電路20的使用壽命得以延長。再者，該感測單元2是一直持續感測該交流風扇馬達12，以致該驅動積體電路20得以根據該感測單元2所持續輸出的該感測輸出Ss而一直自動調整該驅動信號Ds，如此該驅動積體電路20對該交流風扇馬達12可達到真實轉速偵測及控速，並避免因該交流風扇馬達12自身品質差異或老化而造成其轉速未達該目標轉速的情況發生。 In summary, since the sensing unit 2, the control unit 3, the pulse width modulation unit 4, the boosting unit 5, and the driving unit 6 are integrated into a single driving integrated circuit 20, In this way, the driving integrated circuit 20 has a smaller circuit area and a lower manufacturing cost than the conventional variable frequency driving device. In addition, since the sensing unit 2 continuously senses the sensing output Ss obtained by the AC fan motor 12 to know the current speed of the AC fan motor 12 and the rotor position of the rotor 121, the driving integrated circuit 20 According to the driving signal Ds generated by the sensing output Ss, a transistor (not shown) in the AC fan motor 12 can be switched to zero, and the The AC fan motor 12 does not generate a reverse electromotive force to the drive unit 6, so that the drive unit 6 can be prevented from being damaged by the reverse electromotive force, so that the service life of the drive integrated circuit 20 in this embodiment can be extended. Moreover, the sensing unit 2 continuously senses the AC fan motor 12 so that the driving integrated circuit 20 can automatically adjust the driving signal Ds according to the sensing output Ss continuously output by the sensing unit 2. In this way, the drive integrated circuit 20 can achieve real speed detection and speed control of the AC fan motor 12, and avoid the situation that the speed of the AC fan motor 12 does not reach the target speed due to the quality difference or aging of the AC fan motor 12.
惟以上所述者，僅為本發明之實施例而已，當不能以此限定本發明實施之範圍，凡是依本發明申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。 However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited in this way, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the patent specification of the present invention are still Within the scope of the invention patent.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102085807A (en) * | 2009-12-07 | 2011-06-08 | 财团法人工业技术研究院 | Driving method and driving device for electric power wheel with slip correction |
| TW201325520A (en) * | 2011-12-29 | 2013-07-01 | Ya Horng Electronic Co Ltd | Safety device of food processor and control module thereof |
| TW201604449A (en) * | 2007-11-16 | 2016-02-01 | 福柏克智慧財產有限責任公司 | Controller for variable transmission |
| TW201640766A (en) * | 2015-05-07 | 2016-11-16 | 寧茂企業股份有限公司 | Controlling module for suppressing DC link voltage regeneration of permanent magnet motor and controlling method thereof |
| TWM569111U (en) * | 2018-07-23 | 2018-10-21 | 林政寬 | Driving integrated circuit for use in alternating current fan motor stepless speed changing |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201604449A (en) * | 2007-11-16 | 2016-02-01 | 福柏克智慧財產有限責任公司 | Controller for variable transmission |
| CN102085807A (en) * | 2009-12-07 | 2011-06-08 | 财团法人工业技术研究院 | Driving method and driving device for electric power wheel with slip correction |
| TW201325520A (en) * | 2011-12-29 | 2013-07-01 | Ya Horng Electronic Co Ltd | Safety device of food processor and control module thereof |
| TW201640766A (en) * | 2015-05-07 | 2016-11-16 | 寧茂企業股份有限公司 | Controlling module for suppressing DC link voltage regeneration of permanent magnet motor and controlling method thereof |
| TWM569111U (en) * | 2018-07-23 | 2018-10-21 | 林政寬 | Driving integrated circuit for use in alternating current fan motor stepless speed changing |
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