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IGBT DRIVERS
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Safety Notice.

It must be prevented that children and the general public have access to the installed driver or can get into proximity!
The driver may only be used for the purposes prescribed by the manufacturer. Inadmissible alterations and use of spare parts and accessories not recommend by the manufacturer of the driver can cause fire, electric shock and injuries.
This document has to be at the disposal of all users, developers and qualified personnel who are to work with the driver.
If measurements and tests on the live device have to be carried out, then the regulations of the Safety Code VBG 4.0 are to be observed, in particular § 8 "Admissible deviations during work on live parts".
Suitable electronic devices are to be used.
Prior to installation and commissioning please read this document thoroughly.

• Commissioning is prohibited if there is visible damage by inappropriate handling or transport.
• Contact while uninstalled is permitted only with ESD protection.
• Install only without supply voltage.
• Always keep sufficient safety distance during commissioning without closed protective housing.
• Contact under live condition is strictly prohibited.

CAUTION: All handling with high voltage is at the risk of one’s life. Definitely comply with the respective safety regulations!

• Work after turn-off is not admissible until the absence of supply voltage has been verified.
• During work after turn-off it has to be observed that components heat up during operation. Contact with these can cause burning.
• The drivers are mounted electrically and mechanically close to the IGBT module by screws. The mechanical strength has to be verified by the user and, if necessary, assured with appropriate tests.


General Information 1IPSD70PW17-60A

The data sheet and application manual describes the programmable single channel IGBT driver 1IPSD70PW17- 60A for traction application.

The driver is designed for use with IGBT modules with VCE up to 1700V of various manufacturers. The internal software has to be adapted to the individual modules and the attributes of the application (e.g. leakage inductance).

Main Features 

• Single channel IGBT driver for single- and multilevel topology
• For 1200V / 1700 V IGBT modules of various manufacturers
• All features controlled by software
   o Digital filtering of analog signals
   o Multiple soft switching OFF
   o Input filter for switching signals
   o LED diagnostics for operation state
   o Option: modulated ERROR feedback signal
• Programmable in circuit, easy adaptation to the application and the used IGBT module
• Plug & play – no additional components necessary
• High peak output current
• High peak output power
• ± 15V secondary drive voltage
• Short signal transition time
• Four level digital desaturation protection
• Modulated output feedback signal


Key Data

 Datasheet

 Basic Hardware Structure

 Driving Conditions

The driver is using digital technology for driving the IGBT module. This new technology is based on variable gate driving resistor values in the switching period. The digital algorithm for switch ON and for switch OFF is described in Switch ON / OFF Algorithm – see page 13.

There is the capacitor in parallel connection to GATE on the driver PCB. It is used

C52 ..... 22nF

Receiving switch ON signal is monitoring by red LED D15. D15 light ON means that the driver is receiving switching ON signal.


Input Filter

The input driving signal is filtered by a special software algorithm – INPUT FILTER.
Input Filter is able to detect and remove high frequency oscillation of input driving signal. Timing constant of input filter is set to 2 us. Input filter is directly controlling feedback error signal. The first switch ON edge is detected and makes change in feedback error signal to be in active state (no light). When no oscillations are detected in the switching input signal, after 2 us the driver starts to switch ON output amplifier and in equal time makes change in feedback error signal to be in active instate (light). When oscillations are detected, then timing constant will be longer and controlling computer will be able to detect problem with optical communication.
Switching OFF signal has 2 us delay too due to do not make shorter switching ON period.


Short Circuit Protection

The driver has a four level desaturation protection. The production settings are:

The voltage levels are defined by the driver hardware and it is possible to change these four voltage levels with resistor removing and settings. Used resistors are 0805 size. The detection time is defined by software.

The formula for resistor value calculating and the resistor placement is seen in the next pictures.

The timing conditions, calculating, selection and output amplifier driving are based on used software.

Every desaturation voltage level has its own LED for easy diagnostics. When desaturation occurs, then the designated LED is in ON state (shining) till removing the supply voltage.


 

U6 and U8 are the optical connectors. The resistors are placed right hand side besides them.
The following picture shows the placement of the resistors (marked red).





LED Diagnostics Table

The driver function after desaturation detection depends on used software. When is used software for multilevel converter, after desaturation detection follows only output error message generating and lighting designated diagnostics LED. The driver is waiting for switch -OFF signal receiving. When switch-OFF signal is detected, soft switching OFF is generated immediately. The driver will remain in OFF state for 50 ms after soft switching OFF. Output error message is in active state (no light) for 50 ms too. Internal software reset will be produced after 50 ms waiting. It is necessary that input driving signal is switched OFF after internal reset. Else the driver will be waiting for switching OFF. 

Over Voltage Protection

Feedback clamping, initial production settings: 1360 V_DC

Supported by software

The protection devices are placed on the driver PCB, due to that we recommend to use very short wires for the connection between driver and IGBT module.



Variable Gate Driving Resistors

The driver is using variable gate resistor for optimal driving IGBT module in switching period. It is possible to use 7 values for selection of opposite diode commutation. Other switchers makes very low Ohms (close to zero) gate and emitter connection.

Selected gate driving resistors for diode commutation are connected between GND and +15V potential. It is necessary for current calculation to use +15V used voltage level – not +30 V level. The result is in used lower resistor value and due to more stable driving conditions. Emitter has fixed connection to GND potential in this time.

Seven (7) values for the ON resistors allow special features like Gate boosting. Next picture shows typical digital driving behaviour in ON switching period.



It is possible to select 7 values gate driving resistors for switching OFF of driving IGBT module. Other switchers makes very low Ohms (close to zero) gate and emitter connection. The selection and driving algorithm is defined by used software. Emitter has fixed connection to GND potential in time of switching OFF. It is necessary for current calculation to use +15V used voltage level – not +30V.
Seven (7) values for the OFF resistors allow special features like fast Gate discharging. Next picture shows typical digital driving behaviour in OFF switching period.




Mechanical Dimensions and Mounting Instructions

Mechanical and Electrical Interfaces: 

 Digital Driver Feature - Programming

 The programming connector (JP1) is placed on the driver board. It is possible to replace the software when the driver is mounted into the power converter.

Quality Standard: 

Manufacturing is located in the EC and certified according to ISO 9001:2000.

Programming Cable: 

The download cable products for the PC are designed to facilitate in-system programming of the FPGA - devices on a printed circuit board directly from a PC. After completion of the logic design and creation of a programming file with the software, the system software is used to program devices directly on the PC board. No additional components are required to program a device.

The programming cables connect to either USB or PC Parallel ports and use fly-wire connectors to the target system board for maximum flexibility. The cables also include adapters for easy interface to widely used 1x8 and 2x5 header configurations.

The product part numbers are:

• HW-USB-2A DOWNLOAD Cable (USB PC connection - Flywire)

• HW-DL-3C DOWNLOAD Cable (Parallel PC connection - Flywire)



 

Exclusion Clause 

Passing on of this document or its contents to company external personnel requires written consent. Usage and copying of the contents to other media is prohibited. Violations will be prosecuted for damages. All rights reserved, including such arising from issue of patents or registration of trade marks or design.

© InPower Systems GmbH 2006. All rights reserved.

Correspondence of the contents of this document with the described hardware has been checked. Discrepancies may exist nevertheless; no guaranty is assumed for total congruence. The information contained in this document is subject to regular revision. Any alterations required will be incorporated in the next issue. Suggestions for improvement are welcome. Changes of the document may occur without prior notice.

This datasheet is part of the InPower Systems driver 1IPSD70PW17-60A.

To guaranty safe and fault free operation it is necessary to have read and understood this datasheet.

In this context InPower Systems GmbH retains the right to change technical data and product specifications without prior notice to the course of improvement.



Type Designation

InPower Systems Programmable Plug & Play Driver: 

For example: