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 Abstract: Introduced the IGBT-IPM intelligence module’s basic situation and the function characteristic, and the question which and needed to pay attention to this intelligent power module’s related circuit design method carry on have analyzed thoroughly, finally unified the SVG installment, explained in detail this module’s application, and has given the system hardware structure drawing.

    Key word: IGBT-IPM intelligence module; SVG; DSP

1 introduction

In the electrical power system the high efficiency electric power electronic installation’s on-off element is mainly the thyristor and GTO. But, along with the recent years double pole power transistor and power MOSFET being published as well as the production technology’s maturity, these on-off element relied on own superior performance to substitute the thyristor and GTO gradually, and toward energy conservation, facile, miniaturized direction rapidly expand. IGBT-IPM 煟 Sang Ruideng peaceful yu yu liang relieves peaceful wisdom Power Module) the intelligent module is precisely one of representatives, it unions and so on IGBT unit, driving circuit, protection circuit when a module, uses these superior characteristics may enhance enormously the practical application system’s stability 熗 may simplify the design the difficulty 熕 bare ∽ father Gui milk to awake.

Figure 1

2 IGBT intelligence module main feature

With passes the IGBT module and driving circuit’s combination circuit compares, and the IGBT-IPM content driving circuit the protection function is complete, thus may enhance the application system complete machine enormously the reliability. What this article is going to introduce is Fuji electrical machinery newest promoted R series IPM the intelligent power module 7MBP100RA-120 main feature and the service condition. It except has the volume to be young, the reliability is high, merits and so on outside low in price, but also below has the major function:

* content driving circuit. This module simultaneously has the soft switch characteristic, may control time IGBT switch’s dV/dt and the surge voltage; Actuates when with the single power source, does not need the reverse bias power source; And may prevent to harm the breakover. When shutdown, the IGBT electronics grid low impedance earth may prevent the noise and so on to cause the VGE rise, but harms the breakover; In the module each IGBT driving circuit has designed the best actuation condition.

* contains each kind of protection circuit. Each IGBT has the overflow protection (OC), the load short circuit protection (SC), the control supply undervoltage protection (UV) and the overheated protection (OH) and so on functions.

Figure 2

    * content warning output function. When presents the above protection movement, may to control IPM the microcomputer system output alarm.

* contains has the braking circuit. The content brake unit’s IPM module, may suppress the PN post with this unit voltage magnification.

Figure 1 is this IGBT-IPM intelligence module internal structure drawing, in the chart pretage actuation part enlarges, the short circuit protection, the overflow protection, the undervoltage block system, including the actuation function electric circuits and so on tube heart overheated protection. In the chart, each pin and the post marking is listed in Table 1.

Table 1 IGBT-IPM intelligence module foot and post marking

3 IGBT intelligence modular circuit design

The IGBT intelligence module’s circuit design mainly divides into the main power unit, the light pair periphery control section, the cushion circuit part and the radiation part. Below the question which and needs to pay attention to these four part of design method carries on the explanation separately.

3.1 main power circuits

Fuji’s IGBT-IPM module has the different series, each series of main supply voltage scope has the difference respectively, when design certainly must consider its application situation the voltage range. the 600V series main supply voltage and the braking maneuver voltage should below 400V, the 1200V series probably below 800V. Time switch’s biggest surge voltage: the 600V series should below 500V, the 1200V series be supposed when 1000V, according to the above various values scope, the use should cause the surge voltage to define in the stipulation value, and should, in most approaches P, the N post place to install the buffer (, if on a leveling circuit meets has many IGBT modules, but also needs in P, the N during main post to add surge absorber). Although has taken the corresponding measure in the module interior to the exterior voltage noise, but because the noise type and the intensity are different, is in addition impossible to avoid situations completely and so on misoperation or damage, therefore needs to exchange the coil to add the filter, and insulates the earth, simultaneously should in each input signal and the place (GND) the parallel 1000pF absorption electric capacity.

3.2 light pair periphery control section

Is different with the main power circuit, what the periphery control circuit mainly aims at is the monolithic integrated circuit control system’s weak electricity control section. Because the module wants direct and the electrical power distribution system connection, therefore, must isolates using the isolation component the module and the control section weak electricity electric circuit, protects the monolithic integrated circuit control system. At the same time, the IGBT module’s working condition is decided correctly to a great extent by, effective, the prompt control signal. Therefore, designs a fine light pair control circuit is also one of module normal work keys. According to the IGBT actuation as well as the contravariant electric circuit’s request 煟 fort 牐 module internal IGBT control supply must be on the bridge arm 3 groups, gets down the bridge arm 1 group, amounts to 4 group of independent 15V direct-current power supply. Figure 2 is one kind of recommendation light pair driving circuit.

In Figure 2 has given several kind of typical light pair driving circuit, the triode and the light pair parallel electric circuit is specially advantageous to the light pair. Below is controls the input the light pair specification requirement:

●CMH=CML>15kV/μs or 10kV/μs

●TPHL=TPLH<0.8ms

●CTR>15%

The recommendation light pair includes:

HCPL-4505, HCPL-4506

TLP759 (IGM), TLP755 and so on.

In the ordinary circumstances, the light pair must conform to UL, VDE and so on safe authentication. Simultaneously the easiest to use light pair and the IGBT control post’s wiring is as far as possible short. Because primary and secondary Chang Jia has big dv/dt, therefore during, initially, the secondary wiring do not too approach reduces the coupling capacity. When uses 15V the direct-current power supply module, suggested that the power source output side the GND post do not interconnect, and reduces stray capacity as far as possible between various power sources and the place, meanwhile must guarantee that the enough big insulation is away from (is bigger than 2mm). The light pair input uses 10μF and 0.1μF the filter electric capacity is mainly the retaining one’s hold voltage is steady and the revision line impedance’s stability, other place’s filter electric capacity is also very essential. Moreover, the control signal input end and the Vcc end receive 20kΩ on pulls the resistance, when does not use the brake unit, should also pulls the resistance in the DB input end and Vcc termination 20kΩ on, otherwise, dv/dt oversized will possibly cause the misoperation. Figure 3 is the control signal input circuit. Other three group on bridge arm control signal the input circuit and Figure 3 same, but 3 group of 15V direct-current power supply should supply power separately. But under bridge arm’s 4 groups, then uses in common a 15V direct-current power supply.

3.3 cushion circuits

The cushion circuit (anti- allows absorbing circuit) mainly to use in suppressing the module internal IGBT unit the overvoltage and dv/dt or the electric current and di/dt, simultaneously reduces IGBT the switching loss. Because the cushion circuit needs the resistance, electric capacity’s power, the volume are big, therefore has not integrated this part of electric circuits specially in the IGBT module interior, therefore, must certainly have the cushion circuit in the actual system, may turn through the electric capacity the overvoltage electromagnetism energy the static electricity energy storage, the resistance may prevent the electric capacity and the inductance has the resonance. If does not have the cushion circuit, component when clear the electric current will rise rapidly, di/dt will be very also big, when will shut off, dv/dt is very big, and will present the very high overvoltage, extremely easy to create the IGBT component’s damage. Therefore, the cushion circuit not only needs in the IGBT module, in SVG system’s leveling circuit also similar need. Figure 4 has given a typical cushion circuit, the related resistance number and the electric capacity size’s design may act according to the concrete system to establish the different parameter.

4 IGBT intelligence module in SVG installment application

Static idle work generator SVG[3][4][5] (Static Var Generator) is the nimble alternating current transmission system (FACTS-Flexible AC Transmis-sion System) in a technical important content, its major function is plays the dynamic idle work in the system to have, the idle work compensation, the voltage support, the improvement system stable role. At present, the improvement voltage quality’s method is (Static Var Compensator) the static idle work compensation system reduces the voltage hunting and the voltage with traditional SVC is asymmetrical, but throws with the machinery cuts the capacitor or the reactor eliminates the voltage not to be balanced, with filter harmonic cancellation. But, these measure’s realization and the control not are too flexible, the equipment price is quite in addition expensive, the service difficulty, thus in the actual system application the effect is not very good. FACTS in the technical SVG installment has overcome these insufficiencies by its nimble dynamic regulation performance. The SVG installment’s hard core is the contravariant electric circuit, after it carries on the rectification DC voltage the inversion to produce with the system corresponding alternating voltage, thus has the exchange reactive power which needs. After IGBT intelligence module, inverts the electric circuit, regardless in the volume, the performance, the stability or the control mode obtained simplified enormously.

This system altogether divides into 3 main parts: The first part is by the IG-BT module constitution contravariant electric circuit, the second part is the full-wave rectification electric circuit which constitutes by the electric power diode, the third part is the examination control system which constitutes by the microcomputer. The leveling circuit uses Japanese Fuji Corporation’s three-phase full-wave rectification module 6RI100G-160, this module’s leading role is becomes three-phase line’s on alternating voltage the direct-current output, thus maintenance cocurrent electric capacity both sides voltage regulation, simultaneously also to invert the electric circuit to provide a DC voltage.

    The microcomputer control system is by is composed take the ADMC401 high speed figure signal processing chip as the core DSP control system, it has the extremely high processing speed and the special 6 group PWM wave has the control pin, may see from Figure 5, the DSP control system besides completes sends out the control signal to IGBT, but may also complete functions and so on three-phase current and voltage examination, man-machine exchange. The electric current examination may complete using the KT100-P electric current sensor, the voltage examination completes using the CHV-50P voltage pick-up. The keyboard management part selects the 82C79 connection chip to manage 16 keyboard entries. The output demonstrated that the part selects take SED1520 as actuates the chip the MGLS-12032A liquid crystal display module (LCD) [3]. This module’s screen one time most may demonstrate that 14 16×16 lattice Chinese characters, in the chart have only drawn the corresponding block diagram. The above function may through realize to the ADMC401 digital signal processing chip software programming. Its program flow diagram see Figure 6 to show.

It is noteworthy that: In what this SVG installment uses is the single bridge connection control circuit, therefore only used a IGBT intelligence module, it altogether had 6 control points. If uses the multi-densified structure and uses many IGBT modules to connect or the parallel operation, will then obtain more control points, certainly, the output profile, the capacity, the voltage will be better. In fact, in the SVG system, besides IGBT inversion module, but also has many other important modules, therefore, if wants to let SVG in system’s IGBT intelligence module normal, highly effective, work safely, but also needs to install other various parts to be coordinated operates, only then can achieve the anticipated control effect.

5 conclusions

The IGBT-IPM module’s application scope is quite widespread, from electrical machinery’s velocity modulation, the drive to does not cut power the electrical power unit, the SVG installment and so on, may say that everything involves to high efficiency situations and so on switch component, electric power transformation, so long as the capacity permission, may apply it. Therefore, understands and the familiar IGBT-IPM intelligence module interface circuit, is advantageous in speeds up the installment the development advancement, enhances the practical application installment the performance, this is also this article introduces the related practical electric circuit and the matters needing attention primary intention. In brief, the user should come carefully, the nimble design system according to own actual need.