TWI455431B - Soft-start circuit - Google Patents
Soft-start circuit Download PDFInfo
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- TWI455431B TWI455431B TW097132136A TW97132136A TWI455431B TW I455431 B TWI455431 B TW I455431B TW 097132136 A TW097132136 A TW 097132136A TW 97132136 A TW97132136 A TW 97132136A TW I455431 B TWI455431 B TW I455431B
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- resistor
- circuit
- switch
- diode
- capacitor
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- 239000003990 capacitor Substances 0.000 claims description 25
- 238000010586 diagram Methods 0.000 description 5
- 230000005693 optoelectronics Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Direct Current Feeding And Distribution (AREA)
- Stopping Of Electric Motors (AREA)
Description
本發明係關於一種緩啟動電路，尤指一種用於伺服馬達驅動器的緩啟動電路。 The present invention relates to a slow start circuit, and more particularly to a slow start circuit for a servo motor driver.
在電力電子中，電流對電容充電時，有可能在剛開始充電時產生瞬間的大電流，此一瞬間的大電流會造成電容的高壓擊穿或是其他不好的效應，甚至會對其他並連或串連的電子元件造成傷害。因此通常在越高電壓或是越高電流的電路裏都會加入一個緩啟動電路，其功能主要為拉長電路的初始化時間，對電容而言即為使之緩慢的充電，以防止上述不好的效應發生。 In power electronics, when the current is charged to the capacitor, it is possible to generate a large instantaneous current at the beginning of charging. This moment of high current will cause high-voltage breakdown of the capacitor or other bad effects, and even other Damage caused by connected or serial electronic components. Therefore, a slow-start circuit is usually added to the circuit with higher voltage or higher current. The function is mainly to initialize the length of the circuit. For the capacitor, it is to make the charging slow, so as to prevent the above-mentioned bad. The effect occurs.
一般而言，在大多數的緩啟動電路設計裏，多使用串接阻抗方式達到緩啟動效果，並在串接的阻抗上並聯一個開關，當電容充電到達某一定電壓值時才將開關關上。參照圖1為習知緩啟動電路的電路圖，其中R0為緩啟動電阻，C0為被充電的電容，J0為開關，Vdc為其充電電壓。當電源開啟的時候，電流會經由電阻R0對電容C0充電，直到電容C0的電壓接近Vdc時，將開關J0閉合。請參照圖2，此時電流就不再經由電阻R0輸出，而改為經由開關J0輸出，使電容C0較不容易因瞬間電流而損毀。但此一電路上設置了一個只用一次的元件(電阻R0)，不但相當浪費，且對產品而言並不經濟。 In general, in most slow-start circuit designs, the series impedance method is used to achieve a slow start effect, and a switch is connected in parallel with the impedance of the series. When the capacitor reaches a certain voltage value, the switch is turned off. 1 is a circuit diagram of a conventional slow start circuit, in which R0 is a slow start resistor, C0 is a charged capacitor, J0 is a switch, and Vdc is a charging voltage thereof. When the power is turned on, the current charges the capacitor C0 via the resistor R0 until the voltage of the capacitor C0 approaches Vdc, and the switch J0 is closed. Referring to FIG. 2, the current is no longer output via the resistor R0, but is output via the switch J0, so that the capacitor C0 is less likely to be damaged by the instantaneous current. However, the use of a single-use component (resistor R0) on this circuit is not only wasteful, but also uneconomical for the product.
鑒於上述內容，有必要提供一種成本較低的緩啟動電路。 In view of the above, it is necessary to provide a slow-start circuit with a lower cost.
一種緩啟動電路，包括一直流電源、一直接連接該於直流電源的回升煞車電路、一電容及一開關，該回升煞車電路用來消耗回灌的電流，其包括一電阻、一二極體及一電晶體，該電阻的一端連接於直流電源的正極，另一端通過該電晶體連接於直流電源的負極，該二極體的陽極連接於電阻的另一端，該二極體的陰極通過開關連接於直流電源的正極。該電容的一端連接於該二極體的陰極，另一端連接於該電晶體，該開關的一端連接於電阻的一端，另一端連接於二極體的陰極。當該開關斷開時，該直流電源經由回升煞車電路的電阻及二極體對該電容充電，當該開關閉合時，回灌的電流會使該電晶體導通，該電阻可消耗該回灌的電流。 A slow-starting circuit includes a DC power supply, a return-up braking circuit directly connected to the DC power supply, a capacitor and a switch, and the rebound braking circuit is configured to consume a recharge current, and includes a resistor, a diode and a transistor, one end of the resistor is connected to the positive pole of the direct current power source, the other end is connected to the negative pole of the direct current power source through the transistor, the anode of the diode is connected to the other end of the resistor, and the cathode of the diode is connected through the switch On the positive side of the DC power supply. One end of the capacitor is connected to the cathode of the diode, and the other end is connected to the transistor. One end of the switch is connected to one end of the resistor, and the other end is connected to the cathode of the diode. When the switch is turned off, the DC power source charges the capacitor via the resistor and the diode of the circuit, and when the switch is closed, the recharge current causes the transistor to be turned on, and the resistor can consume the recharge. Current.
相較習知技術，該緩啟動電路採用常見的回升煞車電路、電容及開關來實現拉長電路的初始化時間的功能，其電路結構簡單，易於實現，且大幅降低了產制的成本。 Compared with the prior art, the slow start circuit adopts a common pull-up braking circuit, a capacitor and a switch to realize the initialization time of the elongated circuit, the circuit structure is simple, easy to implement, and the production cost is greatly reduced.
C0‧‧‧電容 C0‧‧‧ capacitor
J0‧‧‧開關 J0‧‧ switch
R0‧‧‧電阻 R0‧‧‧ resistance
Vdc‧‧‧電壓 Vdc‧‧‧ voltage
10‧‧‧回升煞車電路 10‧‧‧Returning brake circuit
C1‧‧‧電容 C1‧‧‧ capacitor
D1‧‧‧二極體 D1‧‧‧ diode
J1‧‧‧開關 J1‧‧‧ switch
Q1‧‧‧電晶體 Q1‧‧‧Optoelectronics
R1‧‧‧電阻 R1‧‧‧ resistance
Vdc‧‧‧電源 Vdc‧‧‧ power supply
圖1為習知緩啟動電路在開關斷開時的電路圖。 FIG. 1 is a circuit diagram of a conventional slow start circuit when a switch is turned off.
圖2為習知緩啟動電路在開關閉合時的電路圖。 2 is a circuit diagram of a conventional slow start circuit when the switch is closed.
圖3為本發明緩啟動電路的較佳實施方式在開關閉合時的電路圖。 3 is a circuit diagram of a preferred embodiment of the slow start circuit of the present invention when the switch is closed.
圖4為本發明緩啟動電路的較佳實施方式在開關閉合時的電路圖 4 is a circuit diagram of a preferred embodiment of the slow start circuit of the present invention when the switch is closed
請參照圖3，本發明緩啟動電路的較佳實施方式包括一電源Vdc、 一回升煞車電路10、一電容C1及一開關J1，該回升煞車電路10包括一電阻R1、一二極體D1及一電晶體Q1，於本較佳實施方式中該電晶體Q1為絕緣柵雙極電晶體，在其他實施方式中該電晶體Q1也可以是可達成相同功能的電晶體。該電阻R1的一端連接該電源Vdc的正極，另一端連接於絕緣柵雙極電晶體Q1的集電極，該絕緣柵雙極電晶體Q1的發射極連接於電源Vdc的負極。該二極體D1的陽極連接於電阻R1的另一端，該二極體D1的陰極通過開關J1連接於電源Vdc的正極。該電容C1的一端連接於二極體D1的陰極，另一端連接於絕緣柵雙極電晶體Q1的發射極。該開關J1的一端連接於電阻R1的一端，另一端連接於二極體D1的陰極。 Referring to FIG. 3, a preferred embodiment of the slow start circuit of the present invention includes a power supply Vdc, The slewing circuit 10 includes a resistor R1, a diode D1 and a transistor Q1. In the preferred embodiment, the transistor Q1 is an insulated gate double. The polar crystal, in other embodiments, the transistor Q1 may also be a transistor that can achieve the same function. One end of the resistor R1 is connected to the anode of the power source Vdc, and the other end is connected to the collector of the insulated gate bipolar transistor Q1. The emitter of the insulated gate bipolar transistor Q1 is connected to the cathode of the power source Vdc. The anode of the diode D1 is connected to the other end of the resistor R1, and the cathode of the diode D1 is connected to the anode of the power source Vdc through the switch J1. One end of the capacitor C1 is connected to the cathode of the diode D1, and the other end is connected to the emitter of the insulated gate bipolar transistor Q1. One end of the switch J1 is connected to one end of the resistor R1, and the other end is connected to the cathode of the diode D1.
當該開關J1斷開時，即相當於該回升煞車電路10發生斷路，該電源Vdc的電流會經由回升煞車電路10的電阻R1經二極體D1對電容C1充電，直到電容C1的電壓接近電源Vdc時，將開關J1閉合。該電容C1在剛開始充電的時候電流限制在Vdc/R1以下，使電容C1較不容易因瞬間電流而損毀。 When the switch J1 is turned off, that is, the tripping brake circuit 10 is disconnected, and the current of the power source Vdc is charged to the capacitor C1 via the diode R1 via the resistor R1 of the rebound braking circuit 10 until the voltage of the capacitor C1 is close to the power source. At Vdc, switch J1 is closed. The current of the capacitor C1 is limited to Vdc/R1 at the beginning of charging, so that the capacitor C1 is less likely to be damaged by the instantaneous current.
參照圖4，當該電容C1充飽電之後將該開關J1閉合時，即相當於該回升煞車電路10發生導通，該電源Vdc的電流不再經由電阻R1輸出，而改為經由開關J1輸送至後端電路。 Referring to FIG. 4, when the capacitor J1 is fully charged, the switch J1 is closed, that is, the turn-up braking circuit 10 is turned on, and the current of the power source Vdc is no longer output via the resistor R1, but is instead sent to the switch J1. Backend circuit.
而當馬達(圖中未示)煞車(減速)時，馬達的反電動勢所產生的電流將會回灌，當電壓超過某一設定值時，該絕緣柵雙極電晶體Q1會導通，將多餘的能量經由電阻R1消耗掉，以保持電源Vdc的電壓穩定，可避免突然升高的電壓會危害到電路上其他元件。 When the motor (not shown) brakes (decelerates), the current generated by the back electromotive force of the motor will be recharged. When the voltage exceeds a certain set value, the insulated gate bipolar transistor Q1 will be turned on, which will be redundant. The energy is dissipated via resistor R1 to keep the voltage of power supply Vdc stable, avoiding sudden rises in voltage that can jeopardize other components on the circuit.
值得注意的是，本發明利用回升煞車電路10的電阻R1在開機時作為緩啟動電阻用，而在電容C1緩慢地充飽電後，可將開關J1閉合 ，此時，該回升煞車電路10的電阻R1用以消耗馬達煞車(減速)時回灌的電流，以保持電源Vdc的電壓穩定。如此可以省下一個緩啟動的電阻，其電路結構簡單，易於實現，且大幅降低了產制的成本。 It should be noted that the present invention utilizes the resistor R1 of the rebound brake circuit 10 as a slow start resistor at the time of power-on, and can close the switch J1 after the capacitor C1 is slowly fully charged. At this time, the resistor R1 of the rebound brake circuit 10 is used to consume the current recharged when the motor brakes (deceleration) to keep the voltage of the power source Vdc stable. This saves a slow-starting resistor, has a simple circuit structure, is easy to implement, and greatly reduces the cost of production.
綜上所述，本發明確已符合發明專利之要件，遂依法提出專利申請。惟，以上所述者僅為本發明之較佳實施方式，自不能以此限制本案之申請專利範圍。凡熟悉本案技藝之人士爰依本發明之精神所作之等效修飾或變化，皆應涵蓋於以下申請專利範圍內。 In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.
10‧‧‧回升煞車電路 10‧‧‧Returning brake circuit
C1‧‧‧電容 C1‧‧‧ capacitor
D1‧‧‧二極體 D1‧‧‧ diode
J1‧‧‧開關 J1‧‧‧ switch
Q1‧‧‧電晶體 Q1‧‧‧Optoelectronics
R1‧‧‧電阻 R1‧‧‧ resistance
Vdc‧‧‧電源 Vdc‧‧‧ power supply
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW097132136A TWI455431B (en) | 2008-08-22 | 2008-08-22 | Soft-start circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW097132136A TWI455431B (en) | 2008-08-22 | 2008-08-22 | Soft-start circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201010228A TW201010228A (en) | 2010-03-01 |
| TWI455431B true TWI455431B (en) | 2014-10-01 |
Family
ID=44828101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW097132136A TWI455431B (en) | 2008-08-22 | 2008-08-22 | Soft-start circuit |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TWI455431B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200527815A (en) * | 2004-02-02 | 2005-08-16 | Aimtron Technology Corp | Soft-start charge pump circuit |
| TW200816610A (en) * | 2006-09-29 | 2008-04-01 | Innolux Display Corp | Switching power supply circuit |
-
2008
- 2008-08-22 TW TW097132136A patent/TWI455431B/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200527815A (en) * | 2004-02-02 | 2005-08-16 | Aimtron Technology Corp | Soft-start charge pump circuit |
| TW200816610A (en) * | 2006-09-29 | 2008-04-01 | Innolux Display Corp | Switching power supply circuit |
Non-Patent Citations (1)
| Title |
|---|
| J. Schonberger, T. Friedli, S. D. Round, J. W. Kolar, "An Ultra Sparse Matrix Converter with a Novel Active Clamp Circuit", Power Conversion Conference-Nagoya, 2007, 5 April 2007, pp. 784-791. * |
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| Publication number | Publication date |
|---|---|
| TW201010228A (en) | 2010-03-01 |
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