Driving circuit used for all-digital alternating-current servo driver

A technology of AC servo and drive circuit, applied in the direction of AC motor control, electrical components, output power conversion devices, etc., can solve problems such as energy discharge control, voltage overvoltage, lack of drive for IGBT modules, etc., to achieve high reliability, Full-featured and easy-to-use effects

Active Publication Date: 2014-12-24
BEIJING MECHANICAL EQUIP INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a driving circuit for an all-digital AC servo driver, which solves the problems of lack of drive, energy discharge control, DC power supply, voltage overvoltage and undervoltage detection and protection of IGBT modules in the servo driver

Method used

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  • Driving circuit used for all-digital alternating-current servo driver

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Embodiment Construction

[0019] A driving circuit for an all-digital AC servo driver, comprising: an IGBT driving circuit 26 . It also includes: a DC power conversion circuit 27 , a voltage detection and alarm circuit 28 and an energy discharge control circuit 29 .

[0020] The DC power conversion circuit 27 includes: a rectifier bridge 1, a transformer 2, a field effect transistor 3, a fast recovery diode A4, a PWM controller 5, a fast recovery diode B6, an optocoupler A7, a voltage dividing resistor A8, a rectifier diode 9 and Integrated voltage regulator 10. The voltage detection and alarm circuit 28 includes: a voltage dividing resistor B11, an operational amplifier 12, a linear optocoupler 13, a voltage comparator A14, an optocoupler B15, a voltage comparator B16 and an optocoupler C17. The energy discharge control circuit 29 includes: a voltage comparator C18, an optocoupler D19, a NAND gate 20, a drive optocoupler A21 and a triode A22. The IGBT driving circuit 26 includes: an inverter 23, a d...

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Abstract

The invention discloses a driving circuit used for an all-digital alternating-current servo driver. The driving circuit comprises an IGBT (insulated gate bipolar transistor) driving circuit, a direct-current power source transformation circuit, a voltage detecting and alarming circuit and an energy discharge control circuit. The direct-current power source transformation circuit comprises a transformer, a PWM (pulse width modulation) controller, rectifier diodes and integrated stabilizers, the voltage detecting and alarming circuit comprises an operation amplifier, a linear optocoupler and a voltage comparator A, the energy discharge control circuit comprises a voltage comparator C, a driving optocoupler A and triodes A. All components are welded on a printed circuit board together. Under control of the PWM controller and the transformer, external alternating current is rectified and stabilized to supply power for the other circuits through the rectifier diodes and the integrated stabilizers, the operation amplifier and the linear optocoupler detect bus voltage outputted by comparison of the voltage comparator A, and the bus voltage is compared by the voltage comparator C to control the driving optocoupler A and the triodes A, and external IGBT driving signals are formed. The driving circuit is complete in functions and high in universality.

Description

technical field [0001] The invention relates to a driving circuit for a servo driver, in particular to a driving circuit for an all-digital AC servo driver. Background technique [0002] At present, the driving circuit has a wide range of applications, and its composition is generally only the IGBT driving circuit. For motor servo drives, such a drive circuit has a single function, lacks energy discharge control, DC power supply, voltage overvoltage and undervoltage protection functions, and has low versatility. Contents of the invention [0003] The purpose of the present invention is to provide a driving circuit for an all-digital AC servo driver, which solves the problems of lack of drive for IGBT modules in the servo driver, energy discharge control, DC power supply, voltage overvoltage and undervoltage detection and protection. [0004] A driving circuit for an all-digital AC servo driver, comprising: an IGBT driving circuit. It also includes: a DC power conversion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/08H02M1/092
Inventor 何成峰李建冬王生捷阎红亮李昕奇
Owner BEIJING MECHANICAL EQUIP INST
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