TWI796781B - Dc motor with discharging unit for inhibiting electromagnetic interference - Google Patents

Dc motor with discharging unit for inhibiting electromagnetic interference Download PDF

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TWI796781B
TWI796781B TW110133450A TW110133450A TWI796781B TW I796781 B TWI796781 B TW I796781B TW 110133450 A TW110133450 A TW 110133450A TW 110133450 A TW110133450 A TW 110133450A TW I796781 B TWI796781 B TW I796781B
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commutation
discharge unit
elements
electromagnetic interference
motor
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TW110133450A
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TW202312631A (en
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洪群雄
吳建銘
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國立高雄師範大學
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Abstract

A DC motor with a discharging unit for inhibiting an electromagnetic interference is proposed. The DC motor with the discharging unit for inhibiting the electromagnetic interference includes a spindle, a plurality of commutation elements, a plurality of windings and a plurality of discharging units. The commutation elements are annularly arranged along the spindle and rotate. An end of each of the windings is electrically connected to one of the commutation elements; the other end of each of the windings is electrically connected to another one of the commutation elements. The discharging units are parallelly connected to the windings. If the one of the commutation elements is in a first state, the one of the commutation elements generates a first current, and the first current pass to the another one of the commutation elements. If the one of the commutation elements is in a second state, the first current pass to the one of the discharging unit, the another one of the commutation elements generates a second current, and the second current pass to the one of the commutation elements. Thus, the DC motor with the discharging unit for inhibiting the electromagnetic interference of the present disclosure connects the discharging unit between each of the windings parallelly so as to avoid the electromagnetic interference due to a rapid change of the winding current flows into the windings while commutating is too big.

Description

具有抑制電磁干擾之放電單元的直流電動機DC motors with discharge unit for suppressing electromagnetic interference

本發明係關於一種電動機，特別是關於一種具有抑制電磁干擾之放電單元的直流電動機。The present invention relates to a motor, in particular to a DC motor with a discharge unit for suppressing electromagnetic interference.

直流電動機須藉由換向片持續轉動，在直流電動機之換向片轉動時，流經繞組之電流方向會改變，而在電流方向改變的瞬間所產生的換向電流變化極大，變化過大的換向電流將會使繞組產生電磁干擾。The DC motor must continue to rotate through the commutator piece. When the commutator piece of the DC motor rotates, the direction of the current flowing through the winding will change, and the commutation current generated at the moment the current direction changes changes greatly. Direct current will cause electromagnetic interference in the winding.

有鑑於此，開發一種避免流經繞組之換向電流變化過大的抑制換向電流變化之直流電動機遂成相關業者努力之目標。In view of this, the development of a DC motor that can prevent the commutation current flowing through the winding from changing too much and suppress the change of the commutation current has become the goal of related industry efforts.

因此，本發明之目的在於提供一種具有抑制電磁干擾之放電單元的直流電動機，以解決瞬間流向繞組的換向電流變化過大而致使電磁干擾產生的問題。Therefore, the object of the present invention is to provide a DC motor with a discharge unit for suppressing electromagnetic interference, so as to solve the problem of electromagnetic interference caused by excessive changes in the commutation current flowing to the winding instantaneously.

根據本發明的結構態樣之一實施方式提供一種具有抑制電磁干擾之放電單元的直流電動機，包含一心軸、複數換向件、複數繞組及複數放電單元。此些換向件沿心軸環形排列而轉動。各繞組之一端電性連接其中一換向件，各繞組之另一端電性連接另一換向件，其中一換向件與另一換向件相鄰。此些放電單元分別並聯連接此些繞組。當其中一換向件呈一第一狀態，其中一換向件產生一第一電流，第一電流經由連接其中一換向件之其中一繞組流向另一換向件；當其中一換向件呈一第二狀態，第一電流流向連接其中一換向件之其中一放電單元，另一換向件產生一第二電流，第二電流經由其中一繞組流向其中一換向件。According to one embodiment of the structural aspect of the present invention, a DC motor with a discharge unit suppressing electromagnetic interference is provided, including a spindle, a plurality of commutation elements, a plurality of windings and a plurality of discharge units. These reversing elements are arranged circularly along the spindle to rotate. One end of each winding is electrically connected to one of the commutating elements, and the other end of each winding is electrically connected to the other commutating element, wherein one of the commutating elements is adjacent to the other commutating element. The discharge units are respectively connected to the windings in parallel. When one of the commutation elements is in a first state, one of the commutation elements generates a first current, and the first current flows to the other commutation element through one of the windings connected to one of the commutation elements; when one of the commutation elements In a second state, the first current flows to one of the discharge units connected to one of the commutation elements, the other commutation element generates a second current, and the second current flows to one of the commutation elements through one of the windings.

藉此，本發明之具有抑制電磁干擾之放電單元的直流電動機在各繞組兩端並聯放電單元，進而避免換向時流入繞組的電流變化過大而產生電磁干擾。Therefore, in the DC motor with the discharge unit for suppressing electromagnetic interference of the present invention, discharge units are connected in parallel at both ends of each winding, thereby avoiding electromagnetic interference caused by excessive changes in the current flowing into the winding during commutation.

前述實施方式之其他實施例如下：前述各放電單元包含一壓敏電阻，壓敏電阻並聯連接對應各放電單元之各繞組。Other examples of the aforementioned embodiment are as follows: each of the aforementioned discharge units includes a piezoresistor, and the piezoresistor is connected in parallel to each winding corresponding to each discharge unit.

前述實施方式之其他實施例如下：前述各放電單元包含一壓敏電阻、一電阻。壓敏電阻包含一第一端及一第二端。電阻包含一第一端及一第二端。其中壓敏電阻之第一端及電阻之第二端電性連接對應各放電單元之各繞組，壓敏電阻之第二端串聯連接電阻之第一端。Other examples of the aforementioned implementation are as follows: each of the aforementioned discharge units includes a piezoresistor and a resistor. The varistor includes a first terminal and a second terminal. The resistor includes a first end and a second end. The first end of the varistor and the second end of the resistor are electrically connected to each winding corresponding to each discharge unit, and the second end of the varistor is connected in series with the first end of the resistor.

前述實施方式之其他實施例如下：前述各放電單元包含二稽納二極體、一電阻。各稽納二極體包含一陰極端及一陽極端，二稽納二極體之二陽極端串聯連接。電阻串聯連接其中一稽納二極體之陰極端。Other examples of the aforementioned embodiment are as follows: each of the aforementioned discharge cells includes two zener diodes and a resistor. Each Zener diode includes a cathode terminal and an anode terminal, and the two anode terminals of the two Zener diodes are connected in series. The resistor is connected in series with the cathode terminal of one of the zener diodes.

前述實施方式之其他實施例如下：前述各放電單元包含一電阻，其中電阻之一阻抗值大於一閾值。Other examples of the aforementioned embodiment are as follows: each of the aforementioned discharge cells includes a resistor, wherein an impedance value of the resistor is greater than a threshold.

根據本發明的結構態樣之另一實施方式提供一種具有抑制電磁干擾之放電單元的直流電動機，包含一心軸、複數換向件、複數繞組及複數放電單元。複數換向件沿心軸環形排列而轉動。各繞組之一端電性連接其中一換向件，各繞組之另一端電性連接另一換向件，其中一換向件與另一換向件彼此間隔設置。此些放電單元分別並聯連接此些繞組。當其中一換向件呈一第一狀態，其中一換向件產生一第一電流，第一電流經由連接其中一換向件之其中一繞組流向另一換向件；當其中一換向件呈一第二狀態，第一電流流向連接其中一換向件之其中一放電單元，另一換向件產生一第二電流，第二電流經由其中一繞組流向其中一換向件。According to another embodiment of the structural aspect of the present invention, a DC motor with a discharge unit for suppressing electromagnetic interference is provided, including a spindle, a plurality of commutation elements, a plurality of windings and a plurality of discharge units. The plurality of commutation elements are arranged circularly along the spindle to rotate. One end of each winding is electrically connected to one of the commutating elements, and the other end of each winding is electrically connected to the other commutating element, wherein the one commutating element and the other commutating element are spaced apart from each other. The discharge units are respectively connected to the windings in parallel. When one of the commutation elements is in a first state, one of the commutation elements generates a first current, and the first current flows to the other commutation element through one of the windings connected to one of the commutation elements; when one of the commutation elements In a second state, the first current flows to one of the discharge units connected to one of the commutation elements, the other commutation element generates a second current, and the second current flows to one of the commutation elements through one of the windings.

藉此，本發明之具有抑制電磁干擾之放電單元的直流電動機在各繞組兩端並聯放電單元，進而避免換向時流入繞組的電流變化過大而產生電磁干擾。Therefore, in the DC motor with the discharge unit for suppressing electromagnetic interference of the present invention, discharge units are connected in parallel at both ends of each winding, thereby avoiding electromagnetic interference caused by excessive changes in the current flowing into the winding during commutation.

前述實施方式之其他實施例如下：前述各放電單元包含一壓敏電阻，壓敏電阻並聯連接對應各放電單元之各繞組。Other examples of the aforementioned embodiment are as follows: each of the aforementioned discharge units includes a piezoresistor, and the piezoresistor is connected in parallel to each winding corresponding to each discharge unit.

前述實施方式之其他實施例如下：前述各放電單元包含一壓敏電阻及一電阻。壓敏電阻包含一第一端及一第二端。電阻包含一第一端及一第二端。壓敏電阻之第一端及電阻之第二端電性連接對應各放電單元之各繞組，壓敏電阻之第二端串聯連接電阻之第一端。Other examples of the aforementioned implementation are as follows: each of the aforementioned discharge units includes a piezoresistor and a resistor. The varistor includes a first terminal and a second terminal. The resistor includes a first end and a second end. The first end of the varistor and the second end of the resistor are electrically connected to each winding corresponding to each discharge unit, and the second end of the varistor is connected in series with the first end of the resistor.

前述實施方式之其他實施例如下：前述各放電單元包含二稽納二極體及一電阻。各稽納二極體包含一陰極端及一陽極端，二稽納二極體之二陽極端串聯連接。電阻串聯連接其中一稽納二極體之陰極端。Other examples of the aforementioned embodiment are as follows: each of the aforementioned discharge cells includes two Zener diodes and a resistor. Each Zener diode includes a cathode terminal and an anode terminal, and the two anode terminals of the two Zener diodes are connected in series. The resistor is connected in series with the cathode terminal of one of the zener diodes.

前述實施方式之其他實施例如下：前述各放電單元包含一電阻，其中電阻之一阻抗值大於一閾值。Other examples of the aforementioned embodiment are as follows: each of the aforementioned discharge cells includes a resistor, wherein an impedance value of the resistor is greater than a threshold.

以下將參照圖式說明本發明之實施例。為明確說明起見，許多實務上的細節將在以下敘述中一併說明。然而，閱讀者應瞭解到，這些實務上的細節不應用以限制本發明。也就是說，在本發明部分實施例中，這些實務上的細節是非必要的。此外，為簡化圖式起見，一些習知慣用的結構與元件在圖式中將以簡單示意的方式繪示；並且重複之元件將可能使用相同的編號表示。Embodiments of the present invention will be described below with reference to the drawings. For the sake of clarity, many practical details are included in the following narrative. However, the reader should understand that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are unnecessary. In addition, for the sake of simplifying the drawings, some commonly used structures and elements will be shown in a simple and schematic way in the drawings; and repeated elements may be denoted by the same reference numerals.

請參照第1A圖及第1B圖，第1A圖係繪示本發明之第一實施例之具有抑制電磁干擾之放電單元D的直流電動機100之電路示意圖；第1B圖係繪示依照第1A圖實施方式之具有抑制電磁干擾之放電單元D的直流電動機100之局部電路示意圖。具有抑制電磁干擾之放電單元D的直流電動機100包含一心軸110、複數換向件120、複數繞組L及複數放電單元D。此些換向件120沿心軸110環形排列而轉動。各繞組L之一端La電性連接其中一換向件120(如第一換向件121)，各繞組L之另一端Lb電性連接另一換向件120(如第二換向件122)，其中一換向件120(如第一換向件121)與另一換向件120(如第二換向件122)相鄰。此些放電單元D分別並聯連接此些繞組L。在本實施方式中，此些換向件120、此些繞組L及此些放電單元D的數量皆為8，但本發明不以此為限。Please refer to Fig. 1A and Fig. 1B. Fig. 1A is a schematic circuit diagram of a DC motor 100 with a discharge unit D for suppressing electromagnetic interference according to the first embodiment of the present invention; Fig. 1B is a diagram according to Fig. 1A A schematic partial circuit diagram of a DC motor 100 with a discharge unit D for suppressing electromagnetic interference according to an embodiment. The DC motor 100 with the discharge unit D for suppressing electromagnetic interference includes a spindle 110 , a plurality of commutation elements 120 , a plurality of windings L and a plurality of discharge units D. The reversing elements 120 are arranged in a ring along the spindle 110 to rotate. One end La of each winding L is electrically connected to one of the reversing members 120 (such as the first reversing member 121), and the other end Lb of each winding L is electrically connected to the other reversing member 120 (such as the second reversing member 122). , one of the reversing elements 120 (such as the first reversing element 121 ) is adjacent to the other reversing element 120 (such as the second reversing element 122 ). The discharge units D are respectively connected to the windings L in parallel. In this embodiment, the number of the commutation elements 120 , the windings L and the discharge units D is 8, but the present invention is not limited thereto.

換句話說，具有抑制電磁干擾之放電單元D的直流電動機100包含8個換向件120，此些換向件120依序為第一換向件121、第二換向件122、第三換向件123、第四換向件124、第五換向件125、第六換向件126、第七換向件127及第八換向件128，換向件120可為片狀的導電元件，相鄰的二個換向件120(例如第一換向件121及第二換向件122)之間透過一個繞組L連接，繞組L與換向件120之繞線方式為疊繞。具有抑制電磁干擾之放電單元D的直流電動機100更包含二個電刷130及二個定子140，二個電刷130分別接觸其中二相對設置的換向件120(例如第一換向件121及第五換向件125)，二個電刷130將直流電源Vs傳導至換向件120的同時，使換向件120相對電刷130位移，進而使二個電刷130接觸分別與其中二相對設置的換向件120(即第一換向件121及第五換向件125)相鄰的換向件120(即第二換向件122及第六換向件126)。換向件120位移的瞬間，連接於第一換向件121及第二換向件122之繞組L的電流方向改變，於此同時，連接於第五換向件125及第六換向件126之繞組L的電流方向亦改變。二個定子140分別為N極磁性件(磁極N)及S極磁性件(磁極S)。在第1A圖實施方式中，直流電動機100之繞組L、心軸110、換向件120、電刷130、定子140及直流電源Vs為習知，且非本發明之重點，其電路結構僅以簡單示意的方式繪示，並不用以限制本發明。In other words, the DC motor 100 with the discharge unit D for suppressing electromagnetic interference includes eight reversing elements 120, and these reversing elements 120 are the first commutating element 121, the second commutating element 122, and the third commutating element in sequence. Reversing member 123, fourth reversing member 124, fifth reversing member 125, sixth reversing member 126, seventh reversing member 127 and eighth reversing member 128, reversing member 120 may be a sheet-shaped conductive element Two adjacent reversing elements 120 (such as the first reversing element 121 and the second reversing element 122 ) are connected through a winding L, and the winding method of the winding L and the reversing element 120 is lap winding. The DC motor 100 with the discharge unit D for suppressing electromagnetic interference further comprises two electric brushes 130 and two stators 140, and the two electric brushes 130 respectively contact two commutating parts 120 (such as the first commutating parts 121 and The fifth commutating member 125), the two brushes 130 conduct the DC power Vs to the commutating member 120, and at the same time, the commutating member 120 is displaced relative to the brush 130, so that the two brushes 130 are in contact with two of them. The reversing elements 120 (ie, the first reversing element 121 and the fifth reversing element 125 ) are adjacent to the reversing elements 120 (ie, the second reversing element 122 and the sixth reversing element 126 ). At the moment when the reversing member 120 is displaced, the direction of the current in the winding L connected to the first reversing member 121 and the second reversing member 122 changes. The current direction of the winding L also changes. The two stators 140 are respectively an N pole magnetic element (magnetic pole N) and an S pole magnetic element (magnetic pole S). In the embodiment shown in Fig. 1A, the winding L of the DC motor 100, the mandrel 110, the reversing member 120, the brush 130, the stator 140 and the DC power supply Vs are known, and are not the focus of the present invention. The circuit structure is only based on It is shown in a simple and schematic manner, and is not intended to limit the present invention.

請參照第1A圖、第1B圖及第1C圖，第1C圖係繪示依照第1A圖實施方式之具有抑制電磁干擾之放電單元D的直流電動機100之另一局部電路示意圖。當其中一換向件120(即第一換向件121)呈一第一狀態，其中一換向件120(即第一換向件121)產生一第一電流I 1，第一電流I 1經由連接其中一換向件120(即第一換向件121)之其中一繞組L流向另一換向件120(即第二換向件122)；當其中一換向件120(即第一換向件121)呈一第二狀態，第一電流I 1流向連接其中一換向件120(即第一換向件121)之其中一放電單元D，另一換向件120(即第二換向件122)產生一第二電流I 2，第二電流I 2經由其中一繞組L流向其中一換向件120(即第一換向件121)。 Please refer to FIG. 1A, FIG. 1B and FIG. 1C. FIG. 1C shows another partial circuit diagram of a DC motor 100 with a discharge unit D for suppressing electromagnetic interference according to the embodiment shown in FIG. 1A. When one of the reversing elements 120 (i.e. the first reversing element 121) is in a first state, one of the reversing elements 120 (i.e. the first reversing element 121) generates a first current I 1 , the first current I 1 One of the windings L connected to one of the commutation elements 120 (ie the first commutation element 121) flows to the other commutation element 120 (ie the second commutation element 122); when one of the commutation elements 120 (ie the first The commutation member 121) is in a second state, and the first current I flows to one of the discharge cells D connected to one of the commutation members 120 (i.e. the first reversing member 121), and the other reversing member 120 (i.e. the second reversing member 120). The commutation element 122) generates a second current I 2 , and the second current I 2 flows to one of the commutation elements 120 (namely the first commutation element 121 ) through one of the windings L.

詳細地說，第1B圖繪示其中一換向件120(即第一換向件121)呈第一狀態之電路示意圖；第1C圖繪示其中一換向件120(即第一換向件121)呈第二狀態之電路示意圖。當其中一換向件120(即第一換向件121)呈第一狀態，第一電流I 1對繞組L儲能，繞組L兩端產生感應電壓V L。當其中一換向件120(即第一換向件121)呈第二狀態，第一電流I 1流向放電單元D，將第一狀態時繞組L上儲存之能量放電至放電單元D，第二電流I 2自另一換向件120(即第二換向件122)流向繞組L，此時第一電流I 1與第二電流I 2方向相反。由於繞組L兩端之感應電壓V L大小隨流入繞組L之電流I L變化大小改變，當繞組L兩端之電流I L變化極大時繞組L兩端將產生極大感應電壓V L，進而產生電磁干擾。藉此，本發明之具有抑制電磁干擾之放電單元D的直流電動機100在各繞組L兩端並聯放電單元D，進而避免換向時繞組L兩端之電流I L變化過大而產生電磁干擾。 In detail, Figure 1B shows a schematic circuit diagram of one of the commutating elements 120 (ie, the first commutating element 121) in the first state; Figure 1C illustrates one of the commutating elements 120 (ie, the first commutating element 121) A schematic circuit diagram of the second state. When one of the reversing elements 120 (ie, the first reversing element 121 ) is in the first state, the first current I 1 stores energy in the winding L, and an induced voltage V L is generated across the winding L. When one of the commutation elements 120 (that is, the first commutation element 121) is in the second state, the first current I flows to the discharge unit D, and the energy stored on the winding L in the first state is discharged to the discharge unit D, and the second current I flows to the discharge unit D. The current I 2 flows from another commutation element 120 (namely, the second commutation element 122 ) to the winding L, and at this moment, the direction of the first current I 1 is opposite to that of the second current I 2 . Since the magnitude of the induced voltage V L at both ends of the winding L changes with the change of the current I L flowing into the winding L, when the current IL at both ends of the winding L changes greatly, a large induced voltage V L will be generated at both ends of the winding L , thereby generating an electromagnetic interference. Thereby, the DC motor 100 with the discharge unit D for suppressing electromagnetic interference of the present invention connects the discharge unit D in parallel at both ends of each winding L, thereby avoiding the electromagnetic interference caused by the excessive change of the current IL at both ends of the winding L during commutation.

請參照第1A圖至第2圖，第2圖係繪示本發明之第二實施例之具有抑制電磁干擾之放電單元D1的直流電動機(圖未繪示)之放電單元D1之局部電路示意圖。具有抑制電磁干擾之放電單元D1的直流電動機包含心軸(圖未繪示)、換向件120、繞組L及放電單元D1。換向件120沿心軸環形排列而轉動。各繞組L之一端La電性連接其中一換向件120，各繞組L之另一端Lb電性連接另一換向件120，其中一換向件120與另一換向件120相鄰。放電單元D1並聯連接繞組L。當其中一換向件120(即第一換向件121)呈一第一狀態，其中一換向件120(即第一換向件121)產生一第一電流I 1，第一電流I 1經由連接其中一換向件120(即第一換向件121)之其中一繞組L流向另一換向件120(即第二換向件122)；當其中一換向件120(即第一換向件121)呈一第二狀態，第一電流I 1流向連接其中一換向件120(即第一換向件121)之其中一放電單元D1，另一換向件120(即第二換向件122)產生一第二電流I 2，第二電流I 2經由其中一繞組L流向其中一換向件120(即第一換向件121)。在第2圖實施方式中，具有抑制電磁干擾之放電單元D1的直流電動機的心軸、換向件120、繞組L分別與第1A圖實施方式之具有抑制電磁干擾之放電單元D的直流電動機100的心軸110、換向件120、繞組L結構相同，不再贅述。特別的是，放電單元D1可包含一壓敏電阻R V，壓敏電阻R V並聯連接各繞組L。具體而言，第2圖係繪示換向件120(即第一換向件121)呈第二狀態之電路示意圖，壓敏電阻R V的電阻值隨其電壓而變化，壓敏電阻R V兩端之電壓低於其工作電壓時，壓敏電阻R V之電阻值較高；壓敏電阻R V兩端之電壓達工作電壓時，壓敏電阻R V之電阻值較低。當其中一換向件120(即第一換向件121)呈第一狀態，壓敏電阻R V兩端之電壓較小，壓敏電阻R V可視為斷路，當其中一換向件120(即第一換向件121)呈第二狀態，流入繞組L之電流I L方向瞬間改變，電流I L變化量極大，此時繞組L兩端產生極大之感應電壓V L，壓敏電阻R V之電阻值變小，壓敏電阻R V可視為一電壓障串聯一低電阻，使第一狀態時流經繞組L之第一電流I 1(見第1B圖)流向放電單元D1，藉以降低流經繞組L之電流I L變化過大。 Please refer to FIG. 1A to FIG. 2. FIG. 2 is a schematic partial circuit diagram of a discharge unit D1 of a DC motor (not shown) having a discharge unit D1 for suppressing electromagnetic interference according to a second embodiment of the present invention. The DC motor with the discharge unit D1 for suppressing electromagnetic interference includes a spindle (not shown), a commutator 120 , a winding L and the discharge unit D1. The reversing elements 120 are arranged circularly along the spindle to rotate. One end La of each winding L is electrically connected to one of the reversing elements 120 , and the other end Lb of each winding L is electrically connected to the other reversing element 120 , wherein one of the reversing elements 120 is adjacent to the other reversing element 120 . The discharge unit D1 is connected to the winding L in parallel. When one of the reversing elements 120 (i.e. the first reversing element 121) is in a first state, one of the reversing elements 120 (i.e. the first reversing element 121) generates a first current I 1 , the first current I 1 One of the windings L connected to one of the commutation elements 120 (ie the first commutation element 121) flows to the other commutation element 120 (ie the second commutation element 122); when one of the commutation elements 120 (ie the first The commutation member 121) is in a second state, and the first current I flows to one of the discharge cells D1 connected to one of the commutation members 120 (i.e. the first reversing member 121), and the other reversing member 120 (i.e. the second reversing member 120). The commutation element 122) generates a second current I 2 , and the second current I 2 flows to one of the commutation elements 120 (namely the first commutation element 121 ) through one of the windings L. In the embodiment in Figure 2, the mandrel, commutator 120, and winding L of the DC motor with the discharge unit D1 for suppressing electromagnetic interference are respectively the same as the DC motor 100 with the discharge unit D for suppressing electromagnetic interference in the embodiment in Figure 1A The mandrel 110, the commutating element 120, and the winding L have the same structure, and will not be repeated here. In particular, the discharge unit D1 may include a piezoresistor R V , and the piezoresistor R V is connected to each winding L in parallel. Specifically, Fig. 2 shows a schematic circuit diagram of the reversing element 120 (that is, the first reversing element 121) in the second state. The resistance value of the piezoresistor R V changes with its voltage, and the piezoresistor R V When the voltage across both ends is lower than its operating voltage, the resistance value of the varistor R V is higher; when the voltage across the varistor R V reaches the operating voltage, the resistance value of the varistor R V is lower. When one of the reversing elements 120 (that is, the first reversing element 121) is in the first state, the voltage at both ends of the varistor R V is small, and the varistor R V can be regarded as an open circuit. When one of the reversing elements 120 ( That is, the first reversing member 121) is in the second state, the direction of the current I L flowing into the winding L changes instantly, and the current I L changes greatly. At this time, a large induced voltage V L is generated at both ends of the winding L, and the varistor R V When the resistance value becomes smaller, the varistor R V can be regarded as a voltage barrier in series with a low resistance, so that the first current I 1 (see Figure 1B) flowing through the winding L in the first state flows to the discharge unit D1, thereby reducing the current flowing through the winding L. The current I L of the winding L changes too much.

請參照第1A圖及第3圖，第3圖係繪示本發明之第三實施例之具有抑制電磁干擾之放電單元D2的直流電動機(圖未繪示)之放電單元D2之局部電路示意圖。具有抑制電磁干擾之放電單元D2的直流電動機包含心軸(圖未繪示)、換向件120、繞組L及放電單元D2。換向件120沿心軸環形排列而轉動。各繞組L之一端La電性連接其中一換向件120，各繞組L之另一端Lb電性連接另一換向件120，其中一換向件120與另一換向件120相鄰。放電單元D2並聯連接繞組L。當其中一換向件120(即第一換向件121)呈一第一狀態，其中一換向件120(即第一換向件121)產生一第一電流I 1，第一電流I 1經由連接其中一換向件120(即第一換向件121)之其中一繞組L流向另一換向件120(即第二換向件122)；當其中一換向件120(即第一換向件121)呈一第二狀態，第一電流I 1流向連接其中一換向件120(即第一換向件121)之其中一放電單元D2，另一換向件120(即第二換向件122)產生一第二電流I 2，第二電流I 2經由其中一繞組L流向其中一換向件120(即第一換向件121)。在第3圖實施方式中，具有抑制電磁干擾之放電單元D2的直流電動機的心軸、換向件120、繞組L分別與第1A圖實施方式之具有抑制電磁干擾之放電單元D的直流電動機100的心軸110、換向件120、繞組L結構相同，不再贅述。特別的是，各放電單元D2可包含一壓敏電阻R V及一電阻R。壓敏電阻R V包含一第一端11及一第二端12。電阻R包含一第一端13及一第二端14。其中壓敏電阻R V之第一端11及電阻R之第二端14電性連接對應各放電單元D2之各繞組L，壓敏電阻R V之第二端12串聯連接電阻R之第一端13。詳細地說，第3圖係繪示換向件120(即第一換向件121)呈第二狀態之電路示意圖。透過壓敏電阻R V將流經繞組L之第一電流I 1放電至放電單元D2，有益於抑制流入繞組L之電流I L的變化量，然而，具有抑制電磁干擾之放電單元D2的直流電動機之轉矩將因此降低。若將壓敏電阻R V與電阻R串聯，在抑制流入繞組L之電流I L之變化量的同時，亦可避免轉矩降低。 Please refer to FIG. 1A and FIG. 3. FIG. 3 is a partial circuit schematic diagram of a discharge unit D2 of a DC motor (not shown) having a discharge unit D2 for suppressing electromagnetic interference according to a third embodiment of the present invention. The DC motor with the discharge unit D2 for suppressing electromagnetic interference includes a spindle (not shown in the figure), a commutator 120 , a winding L and the discharge unit D2. The reversing elements 120 are arranged circularly along the spindle to rotate. One end La of each winding L is electrically connected to one of the reversing elements 120 , and the other end Lb of each winding L is electrically connected to the other reversing element 120 , wherein one of the reversing elements 120 is adjacent to the other reversing element 120 . The discharge unit D2 is connected to the winding L in parallel. When one of the reversing elements 120 (i.e. the first reversing element 121) is in a first state, one of the reversing elements 120 (i.e. the first reversing element 121) generates a first current I 1 , the first current I 1 One of the windings L connected to one of the commutation elements 120 (ie the first commutation element 121) flows to the other commutation element 120 (ie the second commutation element 122); when one of the commutation elements 120 (ie the first The commutation member 121) is in a second state, the first current I flows to one of the discharge cells D2 connected to one of the commutation members 120 (i.e. the first reversing member 121), and the other reversing member 120 (i.e. the second reversing member 120) is in a second state. The commutation element 122) generates a second current I 2 , and the second current I 2 flows to one of the commutation elements 120 (namely the first commutation element 121 ) through one of the windings L. In the embodiment in Figure 3, the mandrel, commutator 120, and winding L of the DC motor with the discharge unit D2 for suppressing electromagnetic interference are respectively the same as the DC motor 100 with the discharge unit D for suppressing electromagnetic interference in the embodiment in Figure 1A The mandrel 110, the commutating element 120, and the winding L have the same structure, and will not be repeated here. In particular, each discharge unit D2 may include a piezoresistor R V and a resistor R. The varistor R V includes a first terminal 11 and a second terminal 12 . The resistor R includes a first terminal 13 and a second terminal 14 . Wherein the first end 11 of the varistor R V and the second end 14 of the resistor R are electrically connected to each winding L corresponding to each discharge unit D2, and the second end 12 of the varistor R V is connected in series with the first end of the resistor R 13. In detail, FIG. 3 shows a schematic circuit diagram of the reversing element 120 (ie, the first reversing element 121 ) in the second state. Discharging the first current I1 flowing through the winding L to the discharge unit D2 through the varistor R V is beneficial to suppress the variation of the current I L flowing into the winding L. However, the DC motor with the discharge unit D2 that suppresses electromagnetic interference The torque will be reduced accordingly. If the piezoresistor R V is connected in series with the resistor R, while suppressing the variation of the current I L flowing into the winding L, the torque reduction can also be avoided.

請參照第1A圖及第4圖，第4圖係繪示本發明之第四實施例之具有抑制電磁干擾之放電單元D3的直流電動機(圖未繪示)之放電單元D3之局部電路示意圖。具有抑制電磁干擾之放電單元D3的直流電動機包含心軸(圖未繪示)、換向件120、繞組L及放電單元D3。換向件120沿心軸環形排列而轉動。各繞組L之一端La電性連接其中一換向件120，各繞組L之另一端Lb電性連接另一換向件120，其中一換向件120與另一換向件120相鄰。放電單元D3並聯連接繞組L。當其中一換向件120(即第一換向件121)呈一第一狀態，其中一換向件120(即第一換向件121)產生一第一電流I 1，第一電流I 1經由連接其中一換向件120(即第一換向件121)之其中一繞組L流向另一換向件120(即第二換向件122)；當其中一換向件120(即第一換向件121)呈一第二狀態，第一電流I 1流向連接其中一換向件120(即第一換向件121)之其中一放電單元D3，另一換向件120(即第二換向件122)產生一第二電流I 2，第二電流I 2經由其中一繞組L流向其中一換向件120(即第一換向件121)。在第4圖實施方式中，具有抑制電磁干擾之放電單元D3的直流電動機的心軸、換向件120、繞組L分別與第1A圖實施方式之具有抑制電磁干擾之放電單元D的直流電動機100的心軸110、換向件120、繞組L結構相同，不再贅述。特別的是，各放電單元D3可包含二稽納二極體Z D1、Z D2及一電阻R。稽納二極體Z D1、Z D2分別包含陰極端b、d及陽極端a、c，二稽納二極體Z D1、Z D2之二陽極端a、c串聯連接。電阻R串聯連接其中一稽納二極體Z D2之陰極端d。換句話說，第4圖繪示繪示換向件120(即第一換向件121)呈第二狀態之電路示意圖。當繞組L兩端之感應電壓V L小於稽納二極體Z D1、Z D2之崩潰電壓時，放電單元D3可視為斷路，當繞組L兩端之感應電壓V L大於稽納二極體Z D1、Z D2之崩潰電壓時，放電單元D3可視為一電壓障(圖未繪示)串聯一電阻(圖未繪示)。當其中一換向件120(即第一換向件121)換向時，電流I L方向瞬間改變，電流值變化量極大，此時繞組L兩端產生極大之感應電壓V L，第一電流I 1釋放至放電單元D3，藉以避免流經繞組L之電流I L變化過大。 Please refer to FIG. 1A and FIG. 4. FIG. 4 is a schematic partial circuit diagram of a discharge unit D3 of a DC motor (not shown) having a discharge unit D3 for suppressing electromagnetic interference according to a fourth embodiment of the present invention. The DC motor with the discharge unit D3 for suppressing electromagnetic interference includes a mandrel (not shown in the figure), a commutator 120 , a winding L and the discharge unit D3. The reversing elements 120 are arranged circularly along the spindle to rotate. One end La of each winding L is electrically connected to one of the reversing elements 120 , and the other end Lb of each winding L is electrically connected to the other reversing element 120 , wherein one of the reversing elements 120 is adjacent to the other reversing element 120 . The discharge unit D3 is connected to the winding L in parallel. When one of the reversing elements 120 (i.e. the first reversing element 121) is in a first state, one of the reversing elements 120 (i.e. the first reversing element 121) generates a first current I 1 , the first current I 1 One of the windings L connected to one of the commutation elements 120 (ie the first commutation element 121) flows to the other commutation element 120 (ie the second commutation element 122); when one of the commutation elements 120 (ie the first The commutation member 121) is in a second state, the first current I flows to one of the discharge cells D3 connected to one of the commutation members 120 (i.e. the first reversing member 121), and the other reversing member 120 (i.e. the second reversing member 120) The commutation element 122) generates a second current I 2 , and the second current I 2 flows to one of the commutation elements 120 (namely the first commutation element 121 ) through one of the windings L. In the embodiment in Figure 4, the mandrel, commutator 120, and winding L of the DC motor with the discharge unit D3 for suppressing electromagnetic interference are respectively the same as the DC motor 100 with the discharge unit D for suppressing electromagnetic interference in the embodiment in Figure 1A The mandrel 110, the commutating element 120, and the winding L have the same structure, and will not be repeated here. In particular, each discharge unit D3 may include two zener diodes Z D1 , Z D2 and a resistor R. As shown in FIG. Zener diodes Z D1 , Z D2 respectively include cathode terminals b, d and anode terminals a, c, and the two anode terminals a, c of the two Zener diodes Z D1 , Z D2 are connected in series. The resistor R is connected in series with the cathode terminal d of one of the zener diodes Z D2 . In other words, FIG. 4 shows a schematic circuit diagram showing the reversing element 120 (ie, the first reversing element 121 ) in the second state. When the induced voltage V L at both ends of the winding L is less than the collapse voltage of Zener diodes Z D1 and Z D2 , the discharge unit D3 can be regarded as an open circuit. When the induced voltage V L at both ends of the winding L is greater than the Zener diode Z When the breakdown voltage of D1 and Z D2 is reached, the discharge unit D3 can be regarded as a voltage barrier (not shown) connected in series with a resistor (not shown). When one of the reversing elements 120 (that is, the first reversing element 121) commutates, the direction of the current I L changes instantly, and the current value changes greatly. At this time, a large induced voltage V L is generated at both ends of the winding L, and the first current I 1 is released to the discharge unit D3, so as to prevent the current I L flowing through the winding L from changing too much.

在本發明的其他實施方式中，放電單元之二稽納二極體及電阻之排列方式可為二稽納二極體之二陰極端相互連接，且其中一稽納二極體與電組串聯連接，或二稽納二極體之二陽極端串聯連接，而電阻連接於二稽納二極體之間，但本發明不以此為限。In other embodiments of the present invention, the arrangement of the two Zener diodes and the resistors of the discharge unit can be that the two cathode terminals of the two Zener diodes are connected to each other, and one of the Zener diodes is connected in series with the electric group. connection, or the two anode terminals of the two Zener diodes are connected in series, and the resistor is connected between the two Zener diodes, but the present invention is not limited thereto.

請參照第1A圖及第5圖，第5圖係繪示本發明之第五實施例之具有抑制電磁干擾之放電單元D4的直流電動機(圖未繪示)之放電單元D4之局部電路示意圖。具有抑制電磁干擾之放電單元D4的直流電動機包含心軸(圖未繪示)、換向件120、繞組L及放電單元D4。換向件120沿心軸環形排列而轉動。各繞組L之一端La電性連接其中一換向件120，各繞組L之另一端Lb電性連接另一換向件120，其中一換向件120與另一換向件120相鄰。放電單元D4並聯連接繞組L。當其中一換向件120(即第一換向件121)呈一第一狀態，其中一換向件120(即第一換向件121)產生一第一電流I 1，第一電流I 1經由連接其中一換向件120(即第一換向件121)之其中一繞組L流向另一換向件120(即第二換向件122)；當其中一換向件120(即第一換向件121)呈一第二狀態，第一電流I 1流向連接其中一換向件120(即第一換向件121)之其中一放電單元D4，另一換向件120(即第二換向件122)產生一第二電流I 2，第二電流I 2經由其中一繞組L流向其中一換向件120(即第一換向件121)。在第5圖實施方式中，具有抑制電磁干擾之放電單元D4的直流電動機的心軸、換向件120、繞組L分別與第1A圖實施方式之具有抑制電磁干擾之放電單元D的直流電動機100的心軸110、換向件120、繞組L結構相同，不再贅述。特別的是，各放電單元D4可包含一電阻R，其中電阻R之一阻抗值大於一閾值。具體而言，第5圖繪示換向件120(即第一換向件121)呈第二狀態之電路示意圖。電阻R可為一高阻抗電阻，電阻R之阻抗值大於繞組L之等效阻抗值。當其中一換向件120(即第一換向件121)呈第一狀態，流經電阻R之電流較小，當其中一換向件120(即第一換向件121)呈第二狀態，繞組L兩端之感應電壓V L可在不受崩潰電壓或工作電壓的限制條件下，直接釋放第一電流I 1至電阻R。因此，當換向瞬間繞組L兩端之感應電壓V L較小時，第一電流I 1仍可放電至電阻R，避免流經繞組L之電流I L變化過大而產生電弧及電磁干擾。 Please refer to FIG. 1A and FIG. 5. FIG. 5 is a schematic partial circuit diagram of a discharge unit D4 of a DC motor (not shown) having a discharge unit D4 for suppressing electromagnetic interference according to a fifth embodiment of the present invention. The DC motor with the discharge unit D4 for suppressing electromagnetic interference includes a mandrel (not shown in the figure), a commutator 120 , a winding L and the discharge unit D4. The reversing elements 120 are arranged circularly along the spindle to rotate. One end La of each winding L is electrically connected to one of the reversing elements 120 , and the other end Lb of each winding L is electrically connected to the other reversing element 120 , wherein one of the reversing elements 120 is adjacent to the other reversing element 120 . The discharge unit D4 is connected to the winding L in parallel. When one of the reversing elements 120 (i.e. the first reversing element 121) is in a first state, one of the reversing elements 120 (i.e. the first reversing element 121) generates a first current I 1 , the first current I 1 One of the windings L connected to one of the commutation elements 120 (ie the first commutation element 121) flows to the other commutation element 120 (ie the second commutation element 122); when one of the commutation elements 120 (ie the first The commutation member 121) is in a second state, and the first current I flows to one of the discharge cells D4 connected to one of the reversing members 120 (i.e. the first reversing member 121), and the other reversing member 120 (i.e. the second reversing member 120). The commutation element 122) generates a second current I 2 , and the second current I 2 flows to one of the commutation elements 120 (namely the first commutation element 121 ) through one of the windings L. In the embodiment in Figure 5, the mandrel, commutator 120, and winding L of the DC motor with the discharge unit D4 for suppressing electromagnetic interference are respectively connected with the DC motor 100 with the discharge unit D for suppressing electromagnetic interference in the embodiment in Figure 1A The mandrel 110, the commutating element 120, and the winding L have the same structure, and will not be repeated here. In particular, each discharge unit D4 may include a resistor R, wherein an impedance value of the resistor R is greater than a threshold. Specifically, FIG. 5 shows a schematic circuit diagram of the reversing element 120 (ie, the first reversing element 121 ) in the second state. The resistor R can be a high-impedance resistor, and the impedance of the resistor R is greater than the equivalent impedance of the winding L. When one of the commutation elements 120 (that is, the first commutation element 121) is in the first state, the current flowing through the resistor R is small; , the induced voltage V L at both ends of the winding L can directly release the first current I 1 to the resistor R without being limited by the breakdown voltage or the operating voltage. Therefore, when the induced voltage V L at both ends of the winding L is small at the moment of commutation, the first current I1 can still discharge to the resistor R, so as to avoid arcing and electromagnetic interference caused by the excessive change of the current I L flowing through the winding L.

請參照第1A圖至第6圖，第6圖係繪示本發明之第六實施例之具有抑制電磁干擾之放電單元D5的直流電動機200之電路示意圖。具有抑制電磁干擾之放電單元D5的直流電動機200包含一心軸210、複數換向件220、複數繞組L及複數放電單元D5。當其中一換向件220呈一第一狀態，其中一換向件220產生一第一電流I 1，第一電流I 1經由連接其中一換向件220之其中一繞組L流向另一換向件220；當其中一換向件220呈一第二狀態，第一電流I 1流向連接其中一換向件120之其中一放電單元D5，另一換向件220產生一第二電流I 2，第二電流I 2經由其中一繞組L流向其中一換向件220。 Please refer to FIG. 1A to FIG. 6. FIG. 6 is a schematic circuit diagram of a DC motor 200 with a discharge unit D5 for suppressing electromagnetic interference according to a sixth embodiment of the present invention. The DC motor 200 with the discharge unit D5 for suppressing electromagnetic interference includes a spindle 210, a plurality of commutation elements 220, a plurality of windings L and a plurality of discharge units D5. When one of the commutation elements 220 is in a first state, one of the commutation elements 220 generates a first current I 1 , and the first current I 1 flows to the other commutation through one of the windings L connected to one of the commutation elements 220 Part 220; when one of the commutating parts 220 is in a second state, the first current I 1 flows to one of the discharge cells D5 connected to one of the commutating parts 120, and the other commutating part 220 generates a second current I 2 , The second current I 2 flows through one of the windings L to one of the commutation elements 220 .

在第6圖實施方式中，換向件220的數量為九個，此些換向件220依序為第一換向件221、第二換向件222、第三換向件223、第四換向件224、第五換向件225、第六換向件226、第七換向件227、第八換向件228及第九換向件229；電刷230的數量為二個；定子240的數量為四個，但本發明不以此為限。具有抑制電磁干擾之放電單元D5的直流電動機200的心軸210、換向件220、電刷230、定子240及放電單元D5分別與第1A圖實施方式之具有抑制電磁干擾之放電單元D的直流電動機100的心軸110、換向件120、電刷130、定子140及放電單元D功能相同，不再贅述。特別的是，連接一繞組L之其中一換向件220(即第一換向件221)與另一換向件220(即第五換向件225)彼此之間間隔至少一換向件220(即第二換向件222、第三換向件223及第四換向件224)。具體而言，繞組L與換向件220之繞線方式為波繞。藉此，本發明之具有抑制電磁干擾之放電單元D5的直流電動機200在各繞組L兩端並聯放電單元D5，進而避免換向時流入繞組L之電流I L變化過大而產生電磁干擾。 In the embodiment shown in Figure 6, the number of reversing elements 220 is nine, and these reversing elements 220 are the first reversing element 221, the second reversing element 222, the third reversing element 223, and the fourth reversing element 220 in sequence. Reversing member 224, the fifth reversing member 225, the sixth reversing member 226, the seventh reversing member 227, the eighth reversing member 228 and the ninth reversing member 229; the number of brushes 230 is two; the stator The number of 240 is four, but the present invention is not limited thereto. The mandrel 210, commutator 220, electric brush 230, stator 240 and discharge unit D5 of the DC motor 200 with the discharge unit D5 for suppressing electromagnetic interference are respectively connected with the direct current of the discharge unit D for suppressing electromagnetic interference in the embodiment of Fig. 1A. The functions of the spindle 110 , the commutator 120 , the brushes 130 , the stator 140 and the discharge unit D of the motor 100 are the same and will not be repeated here. In particular, one of the commutation elements 220 (ie, the first commutation element 221 ) and the other commutation element 220 (ie, the fifth commutation element 225 ) connected to a winding L are separated from each other by at least one commutation element 220 (ie the second reversing element 222 , the third reversing element 223 and the fourth reversing element 224 ). Specifically, the winding method of the winding L and the commutating element 220 is wave winding. Thereby, the DC motor 200 with the discharge unit D5 for suppressing electromagnetic interference of the present invention connects the discharge unit D5 in parallel at both ends of each winding L, so as to avoid the electromagnetic interference caused by the excessive change of the current IL flowing into the winding L during commutation.

在本發明的其他實施方式中，具有抑制電磁干擾之放電單元D5的直流電動機200的放電單元D5可依據需求替換為第2圖實施方式之放電單元D1、第3圖實施方式之放電單元D2、第4圖實施方式之放電單元D3或第5圖實施方式之放電單元D4，本發明不以此為限。In other embodiments of the present invention, the discharge unit D5 of the DC motor 200 having the discharge unit D5 for suppressing electromagnetic interference can be replaced by the discharge unit D1 of the embodiment in FIG. 2 , the discharge unit D2 of the embodiment in FIG. 3 , The discharge cell D3 in the embodiment shown in FIG. 4 or the discharge cell D4 in the embodiment shown in FIG. 5 is not limited thereto.

由上述實施方式可知，本發明之具有抑制電磁干擾之放電單元的直流電動機具有下列優點：其一，本發明之具有抑制電磁干擾之放電單元的直流電動機在各繞組兩端並聯放電單元，進而避免換向時流入繞組之繞組電流變化過大而產生電磁干擾；其二，在抑制繞組電流變化的同時，亦可避免轉矩降低。As can be seen from the foregoing embodiments, the DC motor with the discharge unit for suppressing electromagnetic interference of the present invention has the following advantages: First, the DC motor with the discharge unit for suppressing electromagnetic interference of the present invention connects discharge units in parallel at each winding two ends, thereby avoiding When commutating, the winding current flowing into the winding changes too much to cause electromagnetic interference; secondly, while suppressing the winding current change, it can also avoid torque reduction.

雖然本發明已以實施方式揭露如上，然其並非用以限定本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾，因此發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed above in terms of implementation, it is not intended to limit the present invention. Any skilled person can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention The ones defined in the scope of the attached patent application shall prevail.

100,200:直流電動機 110,210:心軸 120,220:換向件 121,221:第一換向件 122,222:第二換向件 123,223:第三換向件 124,224:第四換向件 125,225:第五換向件 126,226:第六換向件 127,227:第七換向件 128,228:第八換向件 130,230:電刷 140,240:定子 229:第九換向件 L:繞組 D,D1,D2,D3,D4,D5:放電單元 I L:電流 I 1:第一電流 I 2:第二電流 R V:壓敏電阻 R:電阻 11,13:第一端 12,14:第二端 Z D1,Z D2:稽納二極體 a,c:陽極端 b,d:陰極端 La:一端 Lb:另一端 Vs:直流電源 V L:感應電壓 N,S:磁極 100,200: DC motor 110,210: Mandrel 120,220: Reversing member 121,221: First reversing member 122,222: Second reversing member 123,223: Third reversing member 124,224: Fourth reversing member 125,225: Fifth reversing member 126,226: Sixth commutator 127,227: seventh commutator 128,228: eighth commutator 130,230: brush 140,240: stator 229: ninth commutator L: winding D, D1, D2, D3, D4, D5: discharge unit I L : Current I 1 : First Current I 2 : Second Current R V : Varistor R: Resistor 11, 13: First Terminal 12, 14: Second Terminal Z D1 , Z D2 : Zener Diode a, c: anode end b, d: cathode end La: one end Lb: the other end Vs: DC power supply V L : induced voltage N, S: magnetic pole

第1A圖係繪示本發明之第一實施例之具有抑制電磁干擾之放電單元的直流電動機之電路示意圖； 第1B圖係繪示依照第1A圖實施方式之具有抑制電磁干擾之放電單元的直流電動機之局部電路示意圖； 第1C圖係繪示依照第1A圖實施方式之具有抑制電磁干擾之放電單元的直流電動機之另一局部電路示意圖； 第2圖係繪示本發明之第二實施例之具有抑制電磁干擾之放電單元的直流電動機之放電單元之局部電路示意圖； 第3圖係繪示本發明之第三實施例之具有抑制電磁干擾之放電單元的直流電動機之放電單元之局部電路示意圖； 第4圖係繪示本發明之第四實施例之具有抑制電磁干擾之放電單元的直流電動機之放電單元之局部電路示意圖； 第5圖係繪示本發明之第五實施例之具有抑制電磁干擾之放電單元的直流電動機之放電單元之局部電路示意圖；及 第6圖係繪示本發明之第六實施例之具有抑制電磁干擾之放電單元的直流電動機之電路示意圖。 Figure 1A is a schematic circuit diagram of a DC motor with a discharge unit for suppressing electromagnetic interference according to the first embodiment of the present invention; Fig. 1B is a schematic partial circuit diagram of a DC motor with a discharge unit for suppressing electromagnetic interference according to the embodiment of Fig. 1A; Figure 1C is a schematic diagram of another partial circuit of a DC motor with a discharge unit for suppressing electromagnetic interference according to the embodiment of Figure 1A; Figure 2 is a partial circuit schematic diagram of a discharge unit of a DC motor with a discharge unit for suppressing electromagnetic interference according to a second embodiment of the present invention; Fig. 3 is a schematic partial circuit diagram of a discharge unit of a DC motor having a discharge unit for suppressing electromagnetic interference according to a third embodiment of the present invention; Fig. 4 is a schematic partial circuit diagram of a discharge unit of a DC motor having a discharge unit for suppressing electromagnetic interference according to a fourth embodiment of the present invention; Fig. 5 is a schematic partial circuit diagram of a discharge unit of a DC motor having a discharge unit for suppressing electromagnetic interference according to a fifth embodiment of the present invention; and FIG. 6 is a schematic circuit diagram of a DC motor with a discharge unit for suppressing electromagnetic interference according to a sixth embodiment of the present invention.

100:直流電動機 110:心軸 120:換向件 121:第一換向件 122:第二換向件 123:第三換向件 124:第四換向件 125:第五換向件 126:第六換向件 127:第七換向件 128:第八換向件 130:電刷 140:定子 L:繞組 D:放電單元 Vs:直流電源 N,S:磁極 100: DC motor 110: mandrel 120: Reversing piece 121: the first reversing member 122: the second reversing member 123: The third reversing member 124: The fourth reversing member 125: The fifth reversing member 126: The sixth commutation piece 127: The seventh commutation piece 128: The eighth reversing member 130: brush 140: Stator L: Winding D: discharge unit Vs: DC power supply N, S: magnetic pole

Claims (10)

一種具有抑制電磁干擾之放電單元的直流電動機，包含： 一心軸； 複數換向件，沿該心軸環形排列而轉動； 複數繞組，各該繞組之一端電性連接其中一該換向件，各該繞組之另一端電性連接另一該換向件，該其中一換向件與該另一換向件相鄰；以及 複數放電單元，分別並聯連接該些繞組； 其中，當該其中一換向件呈一第一狀態，該其中一換向件產生一第一電流，該第一電流經由連接該其中一換向件之其中一該繞組流向該另一換向件；當該其中一換向件呈一第二狀態，該第一電流流向連接該其中一換向件之其中一該放電單元，該另一換向件產生一第二電流，該第二電流經由該其中一繞組流向該其中一換向件。 A DC motor with a discharge unit for suppressing electromagnetic interference, comprising: a mandrel; A plurality of reversing elements arranged circularly along the mandrel to rotate; A plurality of windings, one end of each winding is electrically connected to one of the commutation elements, the other end of each winding is electrically connected to the other commutation element, and one of the commutation elements is adjacent to the other commutation element; as well as A plurality of discharge units are respectively connected in parallel to the windings; Wherein, when one of the commutating elements is in a first state, one of the commutating elements generates a first current, and the first current flows to the other commutating element through one of the windings connected to the one of the commutating elements. components; when one of the commutation components is in a second state, the first current flows to one of the discharge cells connected to one of the commutation components, and the other commutation component generates a second current, and the second current Flow through the one of the windings to the one of the commutation elements. 如請求項1所述之具有抑制電磁干擾之放電單元的直流電動機，其中各該放電單元包含： 一壓敏電阻，並聯連接對應各該放電單元之各該繞組。 The DC motor with a discharge unit for suppressing electromagnetic interference as described in claim 1, wherein each discharge unit includes: A piezoresistor is connected in parallel to each of the windings corresponding to each of the discharge units. 如請求項1所述之具有抑制電磁干擾之放電單元的直流電動機，其中各該放電單元包含： 一壓敏電阻，包含一第一端及一第二端；及 一電阻，包含一第一端及一第二端； 其中，該壓敏電阻之該第一端及該電阻之該第二端電性連接對應各該放電單元之各該繞組，該壓敏電阻之該第二端串聯連接該電阻之該第一端。 The DC motor with a discharge unit for suppressing electromagnetic interference as described in claim 1, wherein each discharge unit includes: A varistor, including a first terminal and a second terminal; and A resistor, including a first terminal and a second terminal; Wherein, the first end of the varistor and the second end of the resistor are electrically connected to the windings corresponding to the discharge units, and the second end of the varistor is connected in series to the first end of the resistor . 如請求項1所述之具有抑制電磁干擾之放電單元的直流電動機，其中各該放電單元包含： 二稽納二極體，各該稽納二極體包含一陰極端及一陽極端，該二稽納二極體之二該陽極端串聯連接；及 一電阻，串聯連接其中一該稽納二極體之該陰極端。 The DC motor with a discharge unit for suppressing electromagnetic interference as described in claim 1, wherein each discharge unit includes: two zener diodes, each zener diode comprising a cathode terminal and an anode terminal, the two anode terminals of the two zener diodes being connected in series; and A resistor is connected in series with the cathode terminal of one of the Zener diodes. 如請求項1所述之具有抑制電磁干擾之放電單元的直流電動機，其中各該放電單元包含： 一電阻，其中該電阻之一阻抗值大於一閾值。 The DC motor with a discharge unit for suppressing electromagnetic interference as described in claim 1, wherein each discharge unit includes: A resistor, wherein an impedance value of the resistor is greater than a threshold. 一種具有抑制電磁干擾之放電單元的直流電動機，包括： 一心軸； 複數換向件，沿該心軸環形排列而轉動； 複數繞組，各該繞組之一端電性連接其中一該換向件，各該繞組之另一端電性連接另一該換向件，該其中一換向件與該另一換向件彼此間隔設置；以及 複數放電單元，分別並聯連接該些繞組； 其中，當該其中一換向件呈一第一狀態，該其中一換向件產生一第一電流，該第一電流經由連接該其中一換向件之其中一該繞組流向該另一換向件；當該其中一換向件呈一第二狀態，該第一電流流向連接該其中一換向件之其中一該放電單元，該另一換向件產生一第二電流，該第二電流經由該其中一繞組流向該其中一換向件。 A DC motor with a discharge unit for suppressing electromagnetic interference, comprising: a mandrel; A plurality of reversing elements arranged circularly along the mandrel to rotate; A plurality of windings, one end of each winding is electrically connected to one of the commutation elements, and the other end of each winding is electrically connected to the other commutation element, and the one of the commutation elements and the other commutation element are spaced apart from each other ;as well as A plurality of discharge units are respectively connected in parallel to the windings; Wherein, when one of the commutating elements is in a first state, one of the commutating elements generates a first current, and the first current flows to the other commutating element through one of the windings connected to the one of the commutating elements. components; when one of the commutation components is in a second state, the first current flows to one of the discharge cells connected to one of the commutation components, and the other commutation component generates a second current, and the second current Flow through the one of the windings to the one of the commutation elements. 如請求項6所述之具有抑制電磁干擾之放電單元的直流電動機，其中各該放電單元包含： 一壓敏電阻，並聯連接對應各該放電單元之各該繞組。 The DC motor with a discharge unit for suppressing electromagnetic interference as described in claim 6, wherein each discharge unit includes: A piezoresistor is connected in parallel to each of the windings corresponding to each of the discharge units. 如請求項6所述之具有抑制電磁干擾之放電單元的直流電動機，其中各該放電單元包含： 一壓敏電阻，包含一第一端及一第二端；及 一電阻，包含一第一端及一第二端； 其中，該壓敏電阻之該第一端及該電阻之該第二端電性連接對應各該放電單元之各該繞組，該壓敏電阻之該第二端串聯連接該電阻之該第一端。 The DC motor with a discharge unit for suppressing electromagnetic interference as described in claim 6, wherein each discharge unit includes: A varistor, including a first terminal and a second terminal; and A resistor, including a first terminal and a second terminal; Wherein, the first end of the varistor and the second end of the resistor are electrically connected to the windings corresponding to the discharge units, and the second end of the varistor is connected in series to the first end of the resistor . 如請求項6所述之具有抑制電磁干擾之放電單元的直流電動機，其中各該放電單元包含： 二稽納二極體，各該稽納二極體包含一陰極端及一陽極端，該二稽納二極體之二該陽極端串聯連接；及 一電阻，串聯連接其中一該稽納二極體之該陰極端。 The DC motor with a discharge unit for suppressing electromagnetic interference as described in claim 6, wherein each discharge unit includes: two zener diodes, each zener diode comprising a cathode terminal and an anode terminal, the two anode terminals of the two zener diodes being connected in series; and A resistor is connected in series with the cathode terminal of one of the Zener diodes. 如請求項6所述之具有抑制電磁干擾之放電單元的直流電動機，其中各該放電單元包含： 一電阻，其中該電阻之一阻抗值大於一閾值。 The DC motor with a discharge unit for suppressing electromagnetic interference as described in claim 6, wherein each discharge unit includes: A resistor, wherein an impedance value of the resistor is greater than a threshold.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW266189B (en) * 1993-10-21 1995-12-21 Gen Electric
CN101589536A (en) * 2007-02-14 2009-11-25 威伯科有限公司 Brush-commutated electric motor
CN102638148A (en) * 2011-02-15 2012-08-15 江苏亚泰机电有限公司 Interference-free permanent-magnet direct-current motor
CN202616960U (en) * 2012-05-15 2012-12-19 深圳联和电机有限公司 A permanent magnetic DC motor
WO2020147073A1 (en) * 2019-01-17 2020-07-23 Johnson Electric (Guangdong) Co, Ltd. Emi filter for dc motor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW266189B (en) * 1993-10-21 1995-12-21 Gen Electric
CN101589536A (en) * 2007-02-14 2009-11-25 威伯科有限公司 Brush-commutated electric motor
CN102638148A (en) * 2011-02-15 2012-08-15 江苏亚泰机电有限公司 Interference-free permanent-magnet direct-current motor
CN202616960U (en) * 2012-05-15 2012-12-19 深圳联和电机有限公司 A permanent magnetic DC motor
WO2020147073A1 (en) * 2019-01-17 2020-07-23 Johnson Electric (Guangdong) Co, Ltd. Emi filter for dc motor

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