CN206041788U - IGBT signal driver device - Google Patents

Abstract

The utility model relates to a IGBT signal driver device, include: the controller for send drive signal and receive fault -signal, with the signal conditioning circuit that the controller is connected, it is including the level shifting circuit and the drive signal buffer that are used for nursing one's health drive signal for nurse one's health fault -signal's logic circuit and the 2nd level shifting circuit, the pad, partly solder connection binding post, another part solder connection fiber optical transceiver, a level shifting circuit and drive signal buffer connect gradually between the output and pad of controller, and logic circuit and the 2nd level shifting circuit connect gradually between the input of pad and controller. Through set up two way parallelly connected modulate circuits respectively in signal conditioning circuit, to take care of drive signal and fault -signal respectively, the pad of line terminal and fiber optical transceiver is connected respectively in the cooperation to can realize the multiplexing of binding post and fiber optical transceiver, the user can select to insert according to the needs at scene.

Description

A kind of IGBT signals driving means

Technical field

This utility model is related to driving means, specially a kind of IGBT signals driving means.

Background technology

With the development of Power Electronic Technique, the converter of all kinds of tailored versions is increasingly popularized.As different converters will Ask signal delay or anti-electromagnetic interference capability different, the structure that result in the power device driver of these equipment is different, compatible Property is poor.

The non-isolated drive circuit that IGBT drives directly transmits drive signal using binding post, due to controller and driving Device is not isolated, when the device of high-tension high-power is driven, in fact it could happen that dangerous phenomenon.Therefore can be used only in specific medium and small In converter；And it is poor with the driving capacity of resisting disturbance of binding post, it is vulnerable to electromagnetic signal interference in transmitting procedure. The isolated form of IGBT drives and is broadly divided into that optical fiber is driving and pulse transformer drives two kinds, for both isolated forms drive, There is signal delay.And for pulse transformer, there is restriction and the electromagnetic interference of minimum pulse width output Problem, it is impossible in being applied to require higher scene.Current driving means can only select a use, and the suitability is poor.

Utility model content

For problems of the prior art, this utility model provides a kind of IGBT signals driving means, binding post Can be multiplexed with fiber optical transceiver, simple structure, strong applicability.

This utility model is to be achieved through the following technical solutions：

A kind of IGBT signals driving means, including：

Controller, for sending drive signal and receiving fault-signal；

The signal conditioning circuit being connected with the controller, which includes the first level conversion electricity for nursing one's health drive signal Road and drive signal buffer, for nursing one's health the logic circuit and second electrical level change-over circuit of fault-signal；

Pad, a part of pad connect binding post, another part pad connection fiber optical transceiver；

First level shifting circuit and drive signal buffer be connected in turn controller outfan and pad it Between, the logic circuit and second electrical level change-over circuit are connected in turn between pad and the input of controller.

Preferably, the controller adopts CPLD, FPGA or MCU.

Preferably, first level shifting circuit and second electrical level change-over circuit are tri-state gate circuit.

Further, logic circuit includes two passages and gate circuit.

Further, drive signal buffer is using driving signal buffer in the same direction.

Preferably, the fiber optical transceiver includes that model is respectively HFBR2521 fiber optic receivers and HFBR1521 optical fiber is sent out Send device.

Preferably, the binding post pad for connecting binding post is arranged on binding post silk-screen, connects fiber optical transceiver Fiber optical transceiver pad be arranged on fiber optical transceiver silk-screen；Binding post silk-screen and fiber optical transceiver silk-screen are overlapped, Fiber optical transceiver pad is arranged in binding post pad periphery.

Compared with prior art, this utility model has following beneficial technique effect：

This utility model is believed to driving respectively by being respectively provided with two-way modulate circuit in parallel in signal conditioning circuit Number and fault-signal nursed one's health, coordinate the pad for connecting terminals of connecting wire and fiber optical transceiver respectively such that it is able to realize wiring The multiplexing of terminal and fiber optical transceiver, user can select incoming fiber optic transceiver or binding post according to the needs at scene, from And multiplexing is realized, and its adaptability is improved, simple structure is reasonable in design.

Further, by the type selecting to each circuit and cooperation, it is possible to increase the fan-out capability of controller, reduction time are prolonged Late, PCB space is saved, is distributed rationally.

Description of the drawings

Fig. 1 is the structured flowchart of driving means described in this utility model example.

Fig. 2 is the principle schematic that driving means send drive signal described in this utility model example.

Fig. 3 is the principle schematic that driving means receive fault-signal described in this utility model example.

Fig. 4 is the circuit diagram of fiber optic receiver described in this utility model example.

Fig. 5 is the circuit diagram of fiber optic transmitter described in this utility model example.

Fig. 6 is the circuit diagram of binding post described in this utility model example.

Fig. 7 is the scattergram of the pad locations described in this utility model example in signal conditioning circuit.

In figure：Fiber optical transceiver pad 11, binding post pad 12, fiber optical transceiver silk-screen 2, binding post silk-screen 3.

Specific embodiment

Below in conjunction with the accompanying drawings this utility model is described in further detail, it is described be to it is of the present utility model explanation and It is not to limit.

Referring to Fig. 1, a kind of IGBT signals driving means of this utility model, as shown in figure 1, which includes：

Controller, for sending drive signal and receiving fault-signal；

The signal conditioning circuit being connected with the controller；Signal conditioning circuit includes, is sequentially connected and drives for nursing one's health First level shifting circuit and drive signal buffer of dynamic signal, is sequentially connected and for nursing one's health the second electrical level of fault-signal Change-over circuit and logic circuit, and the pad of connection binding post and fiber optical transceiver；Pad is included for connecting optical fiber receipts Send out the pad of the pad and binding post of device.

By above-mentioned architecture signals driving means, the multiplexing of binding post and fiber optical transceiver is capable of achieving, user can be with According to the needs at scene, by the selection of pad, incoming fiber optic transceiver or binding post is selected, so as to realize multiplexing.

Wherein, controller adopts CPLD, FPGA or MCU controller.

Such as the signal processing shown in Fig. 2 and Fig. 3, and all parts play a part of and annexation.Such as Fig. 2 Shown, CPLD, FPGA or MCU controller sends IGBT or so bridge drive signals in signal conditioning circuit, by the first level After change-over circuit and drive signal buffer are nursed one's health to drive signal, obtain it is conditioned after drive signal, can select Binding post is connected to by pad, drives via terminal the electric drive signal for being converted to non-isolated to be input to the drive of IGBT or so bridges Dynamic device；Can also select fiber optical transceiver to be connected to by pad, drive the optical fiber drive signal for being converted to isolation via optical fiber It is input to IGBT or so bridge drivers.

As shown in figure 3, when IGBT or so bridge failures, can corresponding selection pad is connected to by binding post, will be non- The failure signal of telecommunication of isolation carries out failure reception by binding post so that form fault-signal feedback after fault-signal parallel connection defeated Enter in signal conditioning circuit, pass sequentially through logic circuit and second electrical level change-over circuit and fault-signal feedback is nursed one's health Afterwards, obtain it is conditioned after fault-signal feedback, be input in CPLD, FPGA or MCU controller.When IGBT or so bridge failures When, additionally it is possible to corresponding selection is connected to pad by fiber optical transceiver, and the failure fiber-optic signal of isolation is passed through fiber optical transceiver Carry out failure reception so that formation fault-signal feed back input is in signal conditioning circuit after fault-signal parallel connection.

Wherein, IGBT drive signals modulate circuit includes the first level shifting circuit and drive signal buffer in Fig. 1, Fault-signal modulate circuit includes logic circuit and second electrical level change-over circuit.Fault-signal modulate circuit is responsible for processing driving event Barrier signal.

Preferably, the first level shifting circuit and second electrical level change-over circuit are tri-state gate circuit.

Logic circuit includes two passages and gate circuit.Fault-signal is respectively processed using two passages and gate circuit. Driving malfunction signal generates a comprehensive driving malfunction signal Jing second electrical levels change-over circuit using two passages and gate circuit and sends into Processed in controller chip.If it is desirable, also can individually enter on demand per driving malfunction signal all the way.What is generated is comprehensive Close driving malfunction signal controller is sent into through second electrical level change-over circuit.

The effect for driving buffer is the fan-out capability for strengthening drive signal.Due to general controller (CPLD or monolithic Machine) fan-out capability it is not strong, if be directly connected to binding post or drive fiber optic transmitter may not reach required for performance. Drive signal buffer used in example of the present utility model be buffer in the same direction (i.e. input signal is identical with output signal, It is the relation of not gate that reverse buffer is input into output), MOSFET complementary output types.It is strong with fan-out capability, and the time prolong Slow low feature.

Fiber optical transceiver in the present embodiment can be using in the model HFBR2521 fiber optic receiver and Fig. 5 in Fig. 4 HFBR1521 fiber optic transmitters.

Fault-signalConnect the binding post in the fiber optic receiver and Fig. 6 in Fig. 4 simultaneously, as fault-signal.Together Reason, drive signal PWMa1 and PWMb1 connect Fig. 6 binding posts and the fiber optic transmitter in Fig. 5 respectively simultaneously, believe as driving Number multiplexing fiber-optic and binding post.Fig. 7, fiber optical transceiver is seen in the design aspect of the PCB construction of device described in the utility model Silk-screen 2 is overlapped with binding post silk-screen 3, reserves the kidney ellipsoid weldering in fiber optical transceiver pad 11 such as Fig. 7 on PCB simultaneously Circular pad in disk and binding post pad 12 such as Fig. 7, receives two optical fiber for sending and 20 pin binding posts using two.According to Specific actual demand to save PCB space, is distributed rationally selecting fiber optical transceiver or binding post choosing weldering.

For the device illustrated in this utility model each embodiment, it is all spirit of the present utility model and principle it Interior, any modification, equivalent substitution and improvements made etc. are should be included within protection domain of the present utility model.

Claims (7)

1. a kind of IGBT signals driving means, it is characterised in that include：

Controller, for sending drive signal and receiving fault-signal；

The signal conditioning circuit being connected with the controller, it include for nurse one's health drive signal the first level shifting circuit and Drive signal buffer, for nursing one's health the logic circuit and second electrical level change-over circuit of fault-signal；

Pad, a part of pad connect binding post, another part pad connection fiber optical transceiver；

First level shifting circuit and drive signal buffer are connected in turn between the outfan of controller and pad, institute State logic circuit and second electrical level change-over circuit is connected in turn between pad and the input of controller.

2. IGBT signals driving means according to claim 1, it is characterised in that the controller adopts CPLD, FPGA Or MCU.

3. IGBT signals driving means according to claim 1, it is characterised in that first level shifting circuit and Two level shifting circuits are tri-state gate circuit.

4. IGBT signals driving means according to claim 3, it is characterised in that logic circuit includes two passages with door electricity Road.

5. IGBT signals driving means according to claim 3, it is characterised in that drive signal buffer adopts same-direction-driving Dynamic signal buffer.

6. IGBT signals driving means according to claim 1, it is characterised in that the fiber optical transceiver includes model point Wei not HFBR2521 fiber optic receivers and HFBR1521 fiber optic transmitters.

7. IGBT signals driving means according to claim 1, it is characterised in that the binding post weldering of connection binding post Disk is arranged on binding post silk-screen, and the fiber optical transceiver pad for connecting fiber optical transceiver is arranged on fiber optical transceiver silk-screen； Binding post silk-screen and fiber optical transceiver silk-screen are overlapped, and fiber optical transceiver pad is arranged in binding post pad periphery.