CN204425301U - A kind of drive circuit of servo-driver - Google Patents
A kind of drive circuit of servo-driver Download PDFInfo
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- CN204425301U CN204425301U CN201520208965.XU CN201520208965U CN204425301U CN 204425301 U CN204425301 U CN 204425301U CN 201520208965 U CN201520208965 U CN 201520208965U CN 204425301 U CN204425301 U CN 204425301U
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Abstract
本实用新型公开了一种伺服驱动器的驱动电路，与绝缘栅双极晶体管连接，包括光耦合器、第一至第三三极管，正极电源和负极电源，所述光耦合器的输出端与第一三极管的基极、正极电源连接，所述第一三极管的集电极与正极电源连接，其发射极与负极电源连接；所述第二三极管的基极与第一三极管的集电极连接，其集电极与正极电源连接，其发射极与第三三极管的集电极连接；所述第三三极管的基极与第一三极管的集电极连接，其发射极与负极电源连接；所述第二三极管的发射极、第三三极管的集电极均与绝缘栅双极晶体管的源极连接。本实用新型通过外界的控制信号控制光耦合器的导通，再通过正极电源、负极电源与三个三极管的配合，进而实现IGBT的快速导通或关断。
The utility model discloses a driving circuit of a servo driver, which is connected with an insulated gate bipolar transistor, and includes an optical coupler, first to third triodes, a positive power supply and a negative power supply, and the output end of the optical coupler is connected to the The base of the first triode is connected to the positive power supply, the collector of the first triode is connected to the positive power supply, and the emitter is connected to the negative power supply; the base of the second triode is connected to the first three The collector of the pole tube is connected, its collector is connected to the positive power supply, its emitter is connected to the collector of the third triode; the base of the third triode is connected to the collector of the first triode, The emitter is connected to the negative power supply; the emitter of the second triode and the collector of the third triode are both connected to the source of the insulated gate bipolar transistor. The utility model controls the conduction of the optical coupler through the external control signal, and then realizes the rapid conduction or shutdown of the IGBT through the cooperation of the positive power supply, the negative power supply and the three triodes.
Description
技术领域technical field
本实用新型涉及伺服驱动器技术领域，更具体地说，特别涉及一种伺服驱动器的驱动电路。The utility model relates to the technical field of servo drives, and more specifically relates to a driving circuit of a servo drive.
背景技术Background technique
随着电力电子技术、微电子技术以及现代控制理论的发展，伺服驱动器已经广泛应用于各个行业。在伺服驱动器中IGBT逆变电路是重要的电路之一；IGBT逆变电路中的IGBT模块也称为绝缘栅双极晶体管,是复合了功率场效应管和电力晶体管的优点而产生的一种新型复合器件,它将功率场效应管和电力晶体管的优点集于一身，既具有输入阻抗高、工作速度快、热稳定性好和驱动电路简单的优点，又具有通态电压低、耐压高和承受电流大等优点，因此应用更加广泛。而如何设计一种可以快速驱动伺服驱动器中IGBT导通的且结构简单的驱动电路是本领域技术人员所研究的方向之一。With the development of power electronics technology, microelectronics technology and modern control theory, servo drives have been widely used in various industries. The IGBT inverter circuit is one of the important circuits in the servo drive; the IGBT module in the IGBT inverter circuit is also called an insulated gate bipolar transistor, which is a new type of transistor that combines the advantages of power field effect transistors and power transistors. Composite device, which combines the advantages of power field effect transistor and power transistor, not only has the advantages of high input impedance, fast working speed, good thermal stability and simple driving circuit, but also has low on-state voltage, high withstand voltage and With the advantages of large current, it is more widely used. How to design a driving circuit that can quickly drive the IGBT in the servo driver to turn on and has a simple structure is one of the research directions for those skilled in the art.
实用新型内容Utility model content
本实用新型的目的在于提供一种结构简单、可以快速驱动伺服驱动器中IGBT导通和关断的伺服驱动器的驱动电路。The purpose of the utility model is to provide a driving circuit of the servo driver which has a simple structure and can quickly drive the IGBT in the servo driver to turn on and off.
为了达到上述目的，本实用新型采用的技术方案如下：In order to achieve the above object, the technical scheme that the utility model adopts is as follows:
一种伺服驱动器的驱动电路，与绝缘栅双极晶体管连接，包括光耦合器、第一至第三三极管，正极电源和负极电源，所述光耦合器的输出端与第一三极管的基极、正极电源连接，所述第一三极管的集电极与正极电源连接，其发射极与负极电源连接；所述第二三极管的基极与第一三极管的集电极连接，其集电极与正极电源连接，其发射极与第三三极管的集电极连接；所述第三三极管的基极与第一三极管的集电极连接，其发射极与负极电源连接；所述第二三极管的发射极、第三三极管的集电极均与绝缘栅双极晶体管的源极连接。A driving circuit of a servo driver, connected to an insulated gate bipolar transistor, comprising an optocoupler, first to third triodes, a positive power supply and a negative power supply, the output terminal of the optocoupler is connected to the first triode The base of the first triode is connected to the positive power supply, the collector of the first triode is connected to the positive power supply, and its emitter is connected to the negative power supply; the base of the second triode is connected to the collector of the first triode connected, its collector is connected to the positive power supply, its emitter is connected to the collector of the third triode; the base of the third triode is connected to the collector of the first triode, and its emitter is connected to the negative pole Power connection; the emitter of the second triode and the collector of the third triode are both connected to the source of the insulated gate bipolar transistor.
优选地，还包括与光耦合器的输入端连接的第一电阻，与第一三极管的基极连接的第二电阻，连接在光耦合器的输出端与正极电源之间的第三电阻，以及连接在第一三极管的集电极与正极电源之间的第四电阻。Preferably, it also includes a first resistor connected to the input terminal of the optocoupler, a second resistor connected to the base of the first triode, and a third resistor connected between the output terminal of the optocoupler and the positive power supply , and a fourth resistor connected between the collector of the first triode and the positive power supply.
优选地，还包括并联连接在正极电源上的第一电容和第二电容，以及并联连接在负极电源上的第三电容和第四电容。Preferably, it also includes a first capacitor and a second capacitor connected in parallel to the positive power supply, and a third capacitor and a fourth capacitor connected in parallel to the negative power supply.
优选地，还包括连接在绝缘栅双极晶体管的源极与栅极之间的稳压二极管。Preferably, a Zener diode connected between the source and the gate of the IGBT is further included.
与现有技术相比，本实用新型的优点在于：本实用新型通过外界的控制信号控制光耦合器的导通，再通过正极电源、负极电源与三个三极管的配合，进而实现IGBT的快速导通或关断。Compared with the prior art, the utility model has the advantages that: the utility model controls the conduction of the optocoupler through the external control signal, and then realizes the rapid conduction of the IGBT through the cooperation of the positive power supply, the negative power supply and the three triodes. on or off.
附图说明Description of drawings
为了更清楚地说明本实用新型实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1是本实用新型所述伺服驱动器的驱动电路的电路图。Fig. 1 is a circuit diagram of the driving circuit of the servo driver described in the present invention.
具体实施方式Detailed ways
下面结合附图对本实用新型的优选实施例进行详细阐述，以使本实用新型的优点和特征能更易于被本领域技术人员理解，从而对本实用新型的保护范围做出更为清楚明确的界定。The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, so as to make a clearer definition of the protection scope of the utility model.
参阅图1所示，本实用新型提供一种伺服驱动器的驱动电路，与绝缘栅双极晶体管IGBT连接，包括光耦合器VL、第一至第三三极管Q1-Q3，正极电源V+和负极电源V-，所述光耦合器VL的输出端与第一三极管Q1的基极、正极电源V+连接，所述第一三极管Q1的集电极与正极电源V+连接，其发射极与负极电源V-连接；所述第二三极管Q2的基极与第一三极管Q1的集电极连接，其集电极与正极电源V+连接，其发射极与第三三极管Q3的集电极连接；所述第三三极管Q3的基极与第一三极管Q1的集电极连接，其发射极与负极电源V-连接；所述第二三极管Q2的发射极、第三三极管Q3的集电极均与绝缘栅双极晶体管IGBT的源极连接。Referring to Fig. 1, the utility model provides a driving circuit of a servo driver, which is connected with an insulated gate bipolar transistor IGBT, including an optocoupler VL, first to third triodes Q1-Q3, positive power supply V+ and negative pole Power supply V-, the output terminal of the optocoupler VL is connected to the base of the first triode Q1 and the positive power supply V+, the collector of the first triode Q1 is connected to the positive power supply V+, and its emitter is connected to the positive power supply V+. The negative power supply V- is connected; the base of the second transistor Q2 is connected to the collector of the first transistor Q1, its collector is connected to the positive power supply V+, and its emitter is connected to the collector of the third transistor Q3 electrode connection; the base of the third transistor Q3 is connected to the collector of the first transistor Q1, and its emitter is connected to the negative power supply V-; the emitter of the second transistor Q2, the third The collectors of the triode Q3 are both connected to the source of the insulated gate bipolar transistor IGBT.
本实用新型还包括与光耦合器VL的输入端连接的第一电阻R1，与第一三极管Q1的基极连接的第二电阻R2，连接在光耦合器VL的输出端与正极电源V+之间的第三电阻R3，以及连接在第一三极管Q1的集电极与正极电源V+之间的第四电阻R4。The utility model also includes a first resistor R1 connected to the input end of the optocoupler VL, a second resistor R2 connected to the base of the first triode Q1, connected to the output end of the optocoupler VL and the positive power supply V+ The third resistor R3 between them, and the fourth resistor R4 connected between the collector of the first triode Q1 and the positive power supply V+.
本实用新型还包括并联连接在正极电源V+上的第一电容C1和第二电容C2，以及并联连接在负极电源V-上的第三电容C3和第四电容C4。The utility model also includes a first capacitor C1 and a second capacitor C2 connected in parallel to the positive power supply V+, and a third capacitor C3 and a fourth capacitor C4 connected in parallel to the negative power supply V-.
本实用新型还包括连接在绝缘栅双极晶体管IGBT的源极与栅极之间的稳压二极管D1。The utility model also includes a constant voltage diode D1 connected between the source and the gate of the insulated gate bipolar transistor IGBT.
本实用新型的工作原理为：当光耦合器VL的输入端输入控制信号为非零时，光耦合器VL导通，第一三极管Q1截至，第二三极管Q2导通，此时正极电源V+对绝缘栅双极晶体管IGBT的源极施加电压，促使其导通；当光耦合器VL的输入端输入控制信号为零时，光耦合器VL截至，第一三极管Q1和第三三极管Q3导通，绝缘栅双极晶体管IGBT的源极没有电压，促使其关断。The working principle of the utility model is: when the input control signal of the input terminal of the optical coupler VL is non-zero, the optical coupler VL is turned on, the first triode Q1 is cut off, and the second triode Q2 is turned on. The positive power supply V+ applies a voltage to the source of the insulated gate bipolar transistor IGBT to make it turn on; when the input control signal of the input terminal of the optocoupler VL is zero, the optocoupler VL is cut off, and the first triode Q1 and the second The triode Q3 is turned on, and the source of the insulated gate bipolar transistor IGBT has no voltage, prompting it to be turned off.
虽然结合附图描述了本实用新型的实施方式，但是专利所有者可以在所附权利要求的范围之内做出各种变形或修改，只要不超过本实用新型的权利要求所描述的保护范围，都应当在本实用新型的保护范围之内。Although the embodiment of the utility model has been described in conjunction with the accompanying drawings, the patent owner can make various deformations or modifications within the scope of the appended claims, as long as it does not exceed the protection scope described in the claims of the utility model, All should be within the protection scope of the present utility model.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230414A (en) * | 2016-08-29 | 2016-12-14 | 成都信息工程大学 | A kind of MOSFET/IGBT high-speed driving circuit based on linear optical coupling isolation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230414A (en) * | 2016-08-29 | 2016-12-14 | 成都信息工程大学 | A kind of MOSFET/IGBT high-speed driving circuit based on linear optical coupling isolation |
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