201012044 九、發明說明： ‘ 【發明所屬之技術領域】 • 本發明係關於一種馬達驅動系統。 【先前技術】 習知之馬達驅動系統包括一馬達、一驅動器及一電 源，該電源電連接於該馬達及驅動器，為其提供工作電 源，該驅動器還與馬達相連，用於傳輸一控制訊號給該馬 達，以控制該馬達之轉速。由於該馬達及驅動器所接收之 ❹工作電壓一致，故導致該馬達驅動系統控速範圍過於狹 窄。 【發明内容】 鑒於以上内容，有必要提供一種控速範圍廣之馬達 驅動系統。 一種馬達驅動系統，包括一電源、一驅動器、一馬 達及一控制單元，該驅動器包括一驅動模塊及一電源轉換 模塊，該電源與該驅動器之驅動模塊及電源轉換模塊均相 ❹連，該驅動模塊還與該馬達之控制端相連，該電源轉換模 塊還與該馬達之電源端及控制單元均相連，該電源用於為 忒驅動模塊提供工作電壓及向該電源轉換模塊輸出電壓， 該驅動模塊用於控制該馬達’該控制單元用於控制該電源 轉換模塊，以使其輸出一可變電壓給該馬達。 別述馬達驅動系統透過該電源轉換模塊使得該驅動 器與馬達可分別接收兩個不同之電壓，避免該馬達受限於 该驅動器之工作電壓，從而可提供更為寬廣之控速範圍。 【實施方式】 6 201012044 料_卜本發明馬達驅動线之第-較佳實施方 、式包括一電源1〇、一驅動器20、一馬達3〇及一控制單元 ，0’该驅動器20包括-驅動模塊22及一電源轉換模塊 24，該電源轉換模塊24包括—開關24〇、一降壓電路 及—升壓電路244。 • 該電源10與該驅動模塊22及開關240均相連，用 t為該驅動H 20提供工作電壓。該驅動模塊22還與該馬 達30之控制端相連，用於傳輸一控制訊號給該馬達1〇, 鲁以控制該馬達10之轉速。該開關MO還與該控制單元仙 相連，以根據該控制單元40之指令選擇性地將該電源1〇 與降壓電路242或升壓電路244之輸入端相連。該控制單 疋40還與該降壓電路242及升麼電路244相連，以使得 該降壓電路242及升壓電路244輸出可變地電壓。該降壓 電路242及升壓電路244之輸出端均與該馬達30之電源 端相連，以為該馬達3〇提供可變之工作電壓。其中，該 降壓電路242與升壓電路⑽之輸出端與馬達如之^ ❹:各串聯—極體（圖未示），其中兩：極體之陽極分別 與該降墨電路242及升壓電路244之輸出端相連，陰極均 與該馬達30相連即可，用於防止當該降壓電路或升 壓電路244工作時’該馬達3〇之電流回流至該升壓電路 244或降壓電路242。 响併參閱圖2，該降壓電路242為一降壓斬波電路 (Buck電路），其包括一第一開關如一第一電晶體、 感L1、一第一二極體m及一第一電容，該 第-電晶體Q1之集極作為該降壓電路242之輸入端根據 7 201012044 •該控制單元40之指令選擇 、相連或空置，射極盘^ 開 與電源1〇 炼m μ 第一電感L1之第一端及該第-二 • 4均相連，基極與難料元 第一電感U之第二端透過該第一電容c 1 ^ 該降壓雷政ΟΛΟ 4 k , U接地，還作為 第一二極fD1 f端輸出工作電麗給該馬達3〇,該 4〇可根據用P ^極接地。本實施方式中，該控制單元 ❹ 於，以上I/要輸出一具有不同占空比之脈寬調製訊 號乂控制该第-電晶體Q1導通或截止之時間。 若用戶透過該控制單元4G選擇該電源1()與 之輸人端即該第—電晶體Q1之集極相連：當該 控制卓το 40輸出之脈寬調製訊號為高電平時，該第一電 晶體Q1導通’該電源10透過該第一電感L1及第一電容 為該馬達3G供電，並同時為該第-電感L1及第-電 容ci充電，該馬達30接收之電壓值與該電源1〇之電壓 值相等；當該控制單元40輸出之脈寬調製訊號為低電平 時，該第一電晶體Q1截止，此時，該第一電感ΙΛ、馬 ❹達30及第一二極體D1組成一回路，該馬達3〇接收之電 壓值接近於零。透過調整該第一電晶體Q1導通及截止之 時間，即該控制單元4〇輸出之脈寬調製訊號之占空比， 即可使得該降壓電路242之輸出電壓之等效電壓不同，從 而使該馬達30接收之工作電壓大小不同，故，透過調節 該控制單元40以產生不同占空比之脈寬調製訊號即可使 得該降壓電路242具有不同之輸出電壓。 請一併參閲圖3，該升壓電路244為一升壓斬波電路 (Boost電路）’其包括一第二開關如一第二電晶體q2、 8 201012044 第一電感L2、一盆_ _ ‘第二電感L2之第一；二極體D1及一第二電容C2,該 -該控制單元4〇之如T作為該升壓電路244之輸入端根據 相連或空置，笛一曰7選擇性地透過該開關240與電源10 二極體D2之陽該第二電晶體Q2之集極及該第二 ^ ^ ^ , 極句相連，該第二電晶體Q2之射極#· 地，基極與該控制單元一，極接 極透過該第二電容m山 一一極體D2之陰 Ψ . C2接地，還作為該升壓電路244 出知輸出工作電壓给該馬達30。 輸 參 ❹ 電路過該_單元4G選擇該電源1G與該升壓 之輸入端即該第二電感L2之第一端相連：當； :钟早兀40輪出之脈寬調製訊號為高； 晶體μ導通，此時，該電源10為該第二電時感12^電 =二電容C2為該馬達3Q提供電壓；#該控 ==寬調製訊號為低電平時，該第二電晶體⑴截 广’此時，該電源1〇及第二電《L2同時對該第二電容 C2充電，並向該馬達3〇提供電壓，故可得到―高於該電 源1〇之電麼值之電塵。透過調節該控制單元扣以產生不 同占空比之脈寬調製訊號即可使得該升愿電路㈣具 同之輸出電壓。其中’該第一開關及第二開關亦可：其他 開關性兀件，如場效應電晶體等。該降壓電路242及升壓 電路244亦可採用其他電路結構，如包括電阻及電容之 RC降壓電路以及包括變壓器之升壓電路等。又，用戶亦 可透過調節該控制單元40以產生其他訊號如正弦波使得 該降壓電路242及升壓電路244具有不同之輪出電壓。 請一併參閱圖4，本發明馬達驅動系統之第二較佳實 201012044 施方式包括一電源100、一驅動器200、一馬達300、一 控制單元400及一電源轉換模塊500。該電源1〇〇與該驅 動器200相連，用於為該驅動器200提供工作電壓。該驅 動器200與該馬達3〇〇及電源轉換模塊5〇〇相連，該電源 轉換模塊500還與該馬達300及控制單元4〇0均相連，該 控制單元400用於控制該電源轉換模塊5〇〇，以將該驅動 器300所輸出之電壓轉換為一可變電壓並輸出給該馬達 300’其他部分與第一較佳實施方式相同。 ❹ 月|J述馬達驅動系統透過該控制單元選擇該降壓電路 或者升壓電路對該電源輸出之電壓進行處理，之後傳送給 該馬達，從而使得該驅動器及馬達可工作於不同之電壓， 2免該馬達受限於該驅動器之工作電壓，故該驅動器可 為該馬達提供更為寬廣之控速範圍。 利申ί上Γ，本料符合㈣專财件，纽法提出專 熟悉本案技藝之人士，在爰依較佳實施例，舉凡 β或變化，皆應涵蓋於以下 寻双U铆 【圖式簡單說明】 犯固円 圖1係本發明馬達驅動 組成示意圖。 、、、、第一較佳實施方式之 圖2係圖1中降壓電 主电路之電路圖。 圖3係圖1中升壓電 €路之電路圖。 圖4係本發明馬達 驅動系統之笛-74· 6 組成示意圖。 第一車父佳貫施方式之 【主要元件符號說明】 201012044 電源 10、 100 降壓電路 242 驅動器 20、 200 升壓電路 244 驅動模塊 22 馬達 30、 300 電源轉換模塊 24 控制單元 40、 400 開關 240 第一電容 C1 第一電晶體 Q1 第二電容 C2 第二電晶體 Q2 第一二極體 D1 第一電感 L1 第二二極體 D2 第二電感 L2 電源轉換模塊 500 11201012044 IX. Description of the invention: ‘Technical field to which the invention pertains. • The present invention relates to a motor drive system. [Prior Art] A conventional motor drive system includes a motor, a driver and a power source electrically connected to the motor and the driver to provide a working power source, and the driver is further connected to the motor for transmitting a control signal to the motor a motor to control the speed of the motor. Since the operating voltages received by the motor and the driver are the same, the speed control range of the motor drive system is too narrow. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a motor drive system having a wide range of speed control. A motor drive system includes a power source, a driver, a motor and a control unit. The driver includes a driving module and a power conversion module. The power source is connected to the driver module and the power conversion module of the driver. The module is further connected to the control end of the motor, and the power conversion module is further connected to the power terminal and the control unit of the motor, and the power source is used for supplying a working voltage to the 忒 driving module and outputting a voltage to the power conversion module, the driving module For controlling the motor', the control unit is for controlling the power conversion module to output a variable voltage to the motor. The motor drive system through the power conversion module allows the driver and the motor to receive two different voltages respectively, thereby preventing the motor from being limited by the operating voltage of the driver, thereby providing a wider range of speed control. [Embodiment] 6 201012044 The first preferred embodiment of the motor drive line of the present invention includes a power supply 1A, a driver 20, a motor 3A and a control unit, 0' the driver 20 includes a - drive The module 22 and a power conversion module 24, the power conversion module 24 includes a switch 24, a step-down circuit and a boost circuit 244. • The power supply 10 is connected to both the drive module 22 and the switch 240, and t provides the operating voltage for the drive H20. The drive module 22 is also coupled to the control terminal of the motor 30 for transmitting a control signal to the motor 1 to control the rotational speed of the motor 10. The switch MO is also coupled to the control unit to selectively connect the power supply 1 to the input of the buck circuit 242 or the boost circuit 244 in accordance with the command of the control unit 40. The control unit 40 is also coupled to the buck circuit 242 and the boost circuit 244 such that the buck circuit 242 and the boost circuit 244 output a variable ground voltage. The output of the buck circuit 242 and the boost circuit 244 are both coupled to the power supply of the motor 30 to provide a variable operating voltage for the motor. The step-down circuit 242 and the output end of the boosting circuit (10) and the motor are as follows: each series-pole body (not shown), wherein two anodes of the pole body and the ink-reducing circuit 242 and the boosting circuit respectively The output of the circuit 244 is connected, and the cathode is connected to the motor 30 for preventing the current of the motor 3 flowing back to the boost circuit 244 or the step-down circuit when the step-down circuit or the boost circuit 244 is operated. 242. Referring to FIG. 2, the step-down circuit 242 is a step-down chopper circuit (Buck circuit), and includes a first switch such as a first transistor, a sense L1, a first diode m, and a first capacitor. The collector of the first transistor Q1 is used as an input terminal of the step-down circuit 242 according to the command of 7 201012044 • the control unit 40 is selected, connected or vacant, and the emitter plate is turned on and the power source 1 is smelted m μ first inductor The first end of L1 and the first -2·4 are connected, and the second end of the first inductor U of the base and the difficult element passes through the first capacitor c 1 ^ the buck Lei Zheng 4 k , U is grounded, As the first two-pole fD1 f-terminal output working power is given to the motor 3〇, the 4〇 can be grounded according to the P^ pole. In this embodiment, the control unit is configured to output a pulse width modulation signal having a different duty ratio to control the time during which the first transistor Q1 is turned on or off. If the user selects the power source 1() through the control unit 4G to connect with the input terminal, that is, the collector of the first transistor Q1: when the pulse width modulation signal outputted by the control channel is high level, the first The transistor Q1 is turned on. The power supply 10 supplies power to the motor 3G through the first inductor L1 and the first capacitor, and simultaneously charges the first inductor L1 and the capacitor ci. The voltage received by the motor 30 and the power source 1 The voltage values of the 〇 are equal; when the pulse width modulation signal output by the control unit 40 is low, the first transistor Q1 is turned off. At this time, the first inductor ❹, the ❹ 30 30, and the first diode D1 Forming a loop, the motor 3〇 receives a voltage value close to zero. By adjusting the turn-on and turn-off time of the first transistor Q1, that is, the duty ratio of the pulse width modulation signal outputted by the control unit 4, the equivalent voltage of the output voltage of the step-down circuit 242 is different, thereby The motor 30 receives different operating voltages. Therefore, the buck circuit 242 has different output voltages by adjusting the control unit 40 to generate pulse width modulation signals of different duty ratios. Referring to FIG. 3 together, the booster circuit 244 is a boost chopper circuit (Boost circuit) which includes a second switch such as a second transistor q2, 8 201012044, a first inductor L2, a basin _ _ ' The first of the second inductor L2; the diode D1 and the second capacitor C2, the control unit 4 such as T as the input end of the booster circuit 244 is selectively connected or vacant, and the flute is selectively Through the switch 240 and the collector of the second transistor Q2 of the power source 10 diode D2 and the second ^^^, the pole sentence, the emitter of the second transistor Q2, the base, and the base The control unit has a pole connected to the cathode of the second capacitor m2. The C2 is grounded, and the booster circuit 244 is also configured to output an operating voltage to the motor 30. The input circuit 过 circuit selects the power supply 1G to be connected to the input end of the boosting, that is, the first end of the second inductor L2: when; the clock pulse modulation signal of the clock is high; μ is turned on. At this time, the power supply 10 is the second electrical sense 12^ electric=two capacitor C2 provides the voltage for the motor 3Q; #控制==the wide modulation signal is low, the second transistor (1) is cut off At this time, the power source 1〇 and the second power “L2 simultaneously charge the second capacitor C2 and supply a voltage to the motor 3〇, so that an electric dust having a value higher than the power of the power source can be obtained. . The boosting circuit (4) has the same output voltage by adjusting the control unit to generate a pulse width modulation signal of different duty ratios. Wherein the first switch and the second switch can also be: other switching components, such as field effect transistors. The buck circuit 242 and the boost circuit 244 can also adopt other circuit configurations, such as an RC buck circuit including a resistor and a capacitor, and a boost circuit including a transformer. Moreover, the user can also adjust the control unit 40 to generate other signals such as sine waves so that the step-down circuit 242 and the boost circuit 244 have different wheel-out voltages. Referring to FIG. 4, a second preferred embodiment of the motor drive system of the present invention includes a power source 100, a driver 200, a motor 300, a control unit 400, and a power conversion module 500. The power source 1 is coupled to the driver 200 for providing an operating voltage to the driver 200. The driver 200 is connected to the motor 3〇〇 and the power conversion module 5〇〇. The power conversion module 500 is also connected to the motor 300 and the control unit 4〇0. The control unit 400 is used to control the power conversion module 5〇. That is, the voltage output from the driver 300 is converted into a variable voltage and output to the other portion of the motor 300' as in the first preferred embodiment. The motor drive system selects the step-down circuit or the boost circuit to process the voltage of the power output through the control unit, and then transmits the voltage to the motor, so that the driver and the motor can operate at different voltages, 2 The motor is limited by the operating voltage of the driver, so the driver can provide a wider range of speed control for the motor. Li Shen Γ Γ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Description: Figure 1 is a schematic diagram of the motor drive composition of the present invention. 2, FIG. 2 is a circuit diagram of the step-down main circuit of FIG. 1. Figure 3 is a circuit diagram of the boosting power meter in Figure 1. Fig. 4 is a schematic view showing the composition of a flute-74·6 of the motor drive system of the present invention. [First component symbol description] 201012044 Power supply 10, 100 step-down circuit 242 Driver 20, 200 Boost circuit 244 Drive module 22 Motor 30, 300 Power conversion module 24 Control unit 40, 400 Switch 240 First capacitor C1 first transistor Q1 second capacitor C2 second transistor Q2 first diode D1 first inductor L1 second diode D2 second inductor L2 power conversion module 500 11