CN206422726U

CN206422726U - A kind of brushless motor driver based on IGBT

Info

Publication number: CN206422726U
Application number: CN201621441770.0U
Authority: CN
Inventors: 王洪生
Original assignee: Hubei Sanjiang Aerospace Hongfeng Control Co Ltd
Current assignee: Hubei Sanjiang Aerospace Hongfeng Control Co Ltd
Priority date: 2016-12-27
Filing date: 2016-12-27
Publication date: 2017-08-18
Anticipated expiration: 2026-12-27

Abstract

The utility model discloses a kind of driver for brushless DC motor based on IGBT, including light-coupled isolation module, CPLD, drive circuit, IGBT and current protecting circuit；Light-coupled isolation module accesses pwm signal and direction signal and sends into CPLD after isolating; CPLD first input end is used to access DVCC voltage signals; second, third input is connected with first, second output end of light-coupled isolation module respectively; 4th input is connected with the output end of current protecting circuit, and the 5th input is connected with outside brushless motor Hall signal；The first input end of drive circuit is connected with CPLD the first output end, and the second input is used to access VCC voltage signals；The first input end of IGBT module is connected with the output end of drive circuit, and the second input is used for access power power supply signal, and the first output end of IGBT module is used to connect brushless electric machine；The input of current protecting circuit is connected with the second output end of IGBT module；This driver for brushless DC motor provides high supply voltage interface and compact conformation, stable and reliable in work.

Description

A kind of brushless motor driver based on IGBT

Technical field

The utility model belongs to Servo Drive Technology's field, is driven more particularly, to a kind of brushless electric machine based on IGBT Dynamic device.

Background technology

Brushless motor driver is the drive part of servo-control system, and it is with controller, executing agency's (actuator) one Rise and constitute servo-control system.Servo-control system is driven under the control of control instruction through brushless motor driver, and drive is held Row mechanism is operated by control instruction.

The servo control mechanism supply voltage that some aircraft are used is high, it is desirable to which compact conformation, lightweight, response are fast, but mesh It is preceding also without can matching brushless motor driver.

Utility model content

For the disadvantages described above or Improvement requirement of prior art, the utility model provides a kind of brushless electricity based on IGBT Machine driver, its object is to provide, a kind of pressure voltage is high, possess the brushless motor driver for improving current protection.

To achieve the above object, according to one side of the present utility model, there is provided a kind of brushless electric machine based on IGBT Driver, including light-coupled isolation module, CPLD (Complex Programmable Logic Device, CPLD), drive circuit, IGBT module and current protecting circuit；

Wherein, the first input end of light-coupled isolation module is used to access pwm signal, and the second input is used to access direction letter Number, CPLD first input end is used to access DVCC voltage signals, the second input and the first output end of light-coupled isolation module It is connected, the 3rd input is connected with the second output end of light-coupled isolation module, the output of the 4th input and current protecting circuit End is connected, and the 5th input is connected with outside brushless motor Hall signal；The first input end of drive circuit and CPLD modules First output end is connected, and the second input is used to access VCC voltage signals；The first input end of IGBT module and drive circuit Output end is connected, and the second input is used for access power power supply signal, and the first output end of IGBT module is used to connect outside nothing Brush motor；The input of current protecting circuit is connected with the second output end of IGBT module.

It is preferred that, the above-mentioned brushless motor driver based on IGBT, in addition to snubber circuit, snubber circuit with IGBT module is connected, and for absorbing the due to voltage spikes produced when IGBT module is turned on and off, IGBT module is protected.

It is preferred that, the above-mentioned brushless motor driver based on IGBT, its current protecting circuit includes the electric current being sequentially connected Sensor and comparator；The input of current sensor is used as the input of current protecting circuit, the output end conduct of comparator The output end of current protecting circuit.

The operation principle of the above-mentioned brushless motor driver based on IGBT is specific as follows：When peripheral control unit sends PWM letters Number and during direction signal, pwm signal and direction signal are respectively through CPLD is sent into after light-coupled isolation, CPLD is according to the letter received Number carry out logical operation and export six road drive signals to send to drive circuit, power are carried out to six road drive signals by drive circuit After amplification, send to IGBT module and carry out raster data model, so as to drive outside brushless electric machine to operate；It is connected on brushless electric machine direct current The bus current signal of current protecting circuit collection brushless electric machine on bus is simultaneously carried out the signal collected and given threshold value Compare, CPLD realizes current protection according to comparative result.

It is preferred that, the above-mentioned brushless motor driver based on IGBT has a housing, CPLD, drive circuit, IGBT module with And current protecting circuit is integrated in housing.

In general, powered compared with prior art there is provided height by the contemplated above technical scheme of the utility model It is voltage interface and compact conformation, stable and reliable in work, the requirement for the servo control mechanism that supply voltage is high, response is fast can be met.

Brief description of the drawings

Fig. 1 is the functional block diagram for the brushless motor driver based on IGBT that embodiment is provided；

Fig. 2 is light-coupled isolation module in embodiment and CPLD circuit diagram；

Fig. 3 is the schematic diagram of the current protecting circuit in embodiment；

Fig. 4 is for the drive circuit schematic diagram in embodiment；

Fig. 5 is for the three phase bridge circuit in embodiment and snubber circuit schematic diagram.

Embodiment

In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain The utility model, is not used to limit the utility model.In addition, institute in each embodiment of the utility model disclosed below As long as the technical characteristic being related to does not constitute conflict and can be just mutually combined each other.

The brushless motor driver based on IGBT that embodiment is provided, its functional block diagram is as shown in figure 1, including being integrated in shell Internal light-coupled isolation module, CPLD, drive circuit, IGBT module, snubber circuit, current sensor and comparator；

In embodiment, drive circuit is realized using driving chip IRS2334S；Brushless motor driver receive pwm signal and Direction signal simultaneously carries out sending into CPLD after light-coupled isolation, and CPLD carries out logical process according to the hall signal received and exports six tunnels Drive signal is sent to driving chip IRS2334S, is supplied to IGBT module to carry out grid after driving chip IRS2334S power amplifications Pole drives, so as to drive brshless DC motor to operate；The current sensor being connected on dc bus gathers the electricity of brushless electric machine Stream signal is simultaneously compared with given threshold value, and comparative result is sent to CPLD and realizes current protection；Snubber circuit is then inhaled The due to voltage spikes produced when IGBT is turned on and off is received to protect IGBT.

Fig. 2 show light-coupled isolation module and CPLD schematic diagram；Wherein, Fig. 2 (a) is light-coupled isolation module and its outer The schematic diagram of circuit is enclosed, Fig. 2 (b) is CPLD modules and peripheral circuit schematic diagram；Wherein, N14 is photoelectrical coupler, and D1 is CPLD Module；Photoelectrical coupler delivers to CPLD after being isolated pwm signal and direction signal, after CPLD is to hall signal, isolation Pwm signal and direction signal carry out logical operation, generate motor drive signal, and carry out electric current according to the output of current comparator Protection.

Fig. 3 show the schematic diagram of the current protecting circuit of embodiment；Wherein Fig. 3 (a) is current sensor and its periphery Circuit diagram, wherein, A3 is current sensor；Fig. 3 (b) is comparator and its peripheral circuit schematic diagram, wherein, N3 is compares Device；The DC bus current signal of current sensor collection brushless electric machine is simultaneously converted to voltage signal, send to comparator with it is pre- If threshold value be compared, comparative result is sent to CPLD.

Fig. 4 show drive circuit schematic diagram, the driving chip IRS2334S that wherein U3 is used by the present embodiment；The electricity Road is used for after being amplified to the motor drive signal that CPLD is exported, and is sent to IGBT grids, realizes the conducting control to three-phase bridge System.

Fig. 5 show three phase bridge circuit and snubber circuit schematic diagram, wherein, Fig. 5 (a) is IGBT module The three phase bridge circuit that SK50GD066ET is constituted, the driving to outside brushless electric machine is realized according to gate drive signal；Fig. 5 (b) institutes Snubber circuit is shown as, snubber circuit is used to absorb the due to voltage spikes that IGBT module is opened and produced when turning off, realized Protection to IGBT module.

As it will be easily appreciated by one skilled in the art that the foregoing is only preferred embodiment of the present utility model, not To limit the utility model, all any modifications made within spirit of the present utility model and principle, equivalent substitution and change Enter, should be included within protection domain of the present utility model.

Claims

1. a kind of brushless motor driver based on IGBT, it is characterised in that including light-coupled isolation module, complex programmable logic Device, drive circuit, IGBT module and current protecting circuit；

The first input end of the light-coupled isolation module is used to access pwm signal, and the second input is used to access direction signal, institute Stating the first input end of CPLD is used to access DVCC voltage signals, the second input and light-coupled isolation module The first output end be connected, the 3rd input is connected with the second output end of light-coupled isolation module, the 4th input and electric current guarantor The output end of protection circuit is connected, and the 5th input is connected with outside brushless motor Hall signal；The first input end of drive circuit It is connected with the first output end of CPLD, the second input is used to access VCC voltage signals；The IGBT moulds The first input end of block is connected with the output end of drive circuit, and the second input is used for access power power supply signal, IGBT module The first output end be used for connect outside brushless electric machine；The input of the current protecting circuit and the second output of IGBT module End is connected.

2. brushless motor driver as claimed in claim 1, it is characterised in that also including snubber circuit, the buffering Absorbing circuit is connected with IGBT module, for absorbing the due to voltage spikes produced when IGBT module is turned on and off, to IGBT module Protected.

3. brushless motor driver as claimed in claim 1 or 2, it is characterised in that the current protecting circuit is included successively Connected current sensor and comparator；The input of the current sensor as current protecting circuit input, it is described The output end of comparator as current protecting circuit output end.

4. brushless motor driver as claimed in claim 1 or 2, it is characterised in that the brushless motor driver has shell Body, the CPLD, drive circuit, IGBT module and current protecting circuit are integrated in housing.