Electric appliance engineer needs one design method, can simplify the highly effective washer, the refrigerator, air conditioning and other domestic electric appliances’ three-phase speed change electrical machinery driver’s performance history. The speed change electrical machinery driver uses the electronic circuit to change electrical machinery’s rotational speed, but is not the low reliable power shifting law which in the old-style electric appliance uses. Moreover, carries on the speed change using the electronic control method also to be able in not the need high velocity, and in the low electrical machinery rotational speed’s situation, realizes the energy conservation. Relatively high speed says, under low-speed condition’s power loss are few. An integrated power source module (IPM) may provide this function.
Must have the right amount power on the appropriate phase to actuate these speed change electrical machinery, must to the electrical machinery and the connection driver has the understanding. In addition, how to obtain redundant reliable as well as the operation security under the harsh working condition, and causes the radiation target to conform to the international standard EMC limitation value is also the challenge which the designers face. This need motor-driven electronic technology aspect related knowledge.
Meanwhile, market requirement, in the perch area is smaller, in a cost lower situation to realize a higher performance and the durability. Moreover, the new design won the market chance of success the time to reduce unceasingly, enables the product the appearing on the market time to become the very important factor. Therefore, the electric system development personnel are withstanding the pressure, needs to accelerate to develop the advancement and promptly to the market delivery final product. The final product promotes in the process any delay to have the possibility to cause to fall behind in the competition.
Uses the discrete component and IGBT (insulation grid double pole transistor) the conventional routes can satisfy the power request, but needs to take the massive printed wiring board space. Moreover, this kind the part which uses discrete component’s conventional routes to need are also more, thus increased the design complexity and lengthened the development time. In addition, part quantity increases also causes the reserve rise to deal with hardware’s demand.
Integrated power source module
The electric system development personnel need some more novel method, in order to reduces the overall development time during reduced work load’s and reduces the risk. In order to solve these difficult problems, the people developed have used the advanced package process the power semiconductor device, used in making the integrated power source module, so as to overcame uses discrete component’s old-style three-phase invertor solution limitation. This new integrated power source module enables the designer to be able to simplify such as the washer and the refrigerator and so on domestic electric appliances’ three-phase AC induction and not brushes the DC motor-driven.
This section has collected low loss high pressure IGBT and the driver IC aspect in view of motor-driven application’s advanced IPM enters as well as the package process new achievement newly amended, thus for needs the application provides one kind of province position electron motor-driven solution. IRAMS10UP60 the PlugNDrive integration power source module (IPM) is IR Corporation iMOTION integration designs the platform series the product, it besides all high pressure power transistor and connection driver electronic circuit integration in a small insulation seal, but also has the protection function, guaranteed that the operational safety as well as the system are reliable. In addition, it can also provide the working voltage by a 15Vdc power source, with the aim of further simplifying it in the motor-driven application use, and accelerates the final product from the development.
The electromagnetic compatibility (EMC) is very important, therefore, this IPM power source module needs to take the circuit wafer layout and the shield, and strengthens through the reduction module interior interconnection line length as well as reduced wiring quantity suppresses EMI (electromagnetic interference). As a result of exposed semiconductor chip in closest position installment, and has used high integration rate IC, therefore, the interconnection line reduced greatly, moreover uses in the chip connection to the liner and the I/O port, connects the wiring which needs to the exterior pin also greatly is the reduction. Not only that its structure had also guaranteed not initiates the breakdown because of the earth bounce or the crosstalk. In brief, ready-made IPM is helpful electric appliance engineer to develop the complete motor-driven system, and reduces all both monotonous tasteless and works with the heart the hard sledding work. If uses the separation plan, engineer needs to build 15 above parts on the circuit wafer, but IPM can reduce the work load to only need build from lifts the capacitor which a module and three are connected.
In order to provide the sole insulation single row in-line type seal (SIP) the province position high performance three-phase invertor, this IPM has used one kind of low cost insulation metallic substrate (IMS) merit. This IMS uses has the high fever conductance entire molded plastic by to facilitate many kinds of parts (including power source chip, driver chip as well as possesses other to be possible to use surface pastes installs passive and active discrete component) the close assembly (Figure 1). In order to provide the suitable shield and maximum limit reduce EMI, in this module’s aluminum sheet maintains at the place electric potential. This kind of new specialized technique enables in the module the chip to be able to distribute the quantity of heat to maintain the security evenly the rated temperature.
This module in a smallest isolation voltage was in the 2000Vrms 23 pin SIP seal the built-in 6 rated voltages is the 600V low break-over voltage, must perforates (NPT) the IGBT chip as well as 3 integrations from lifted the diode and 1 three-phase high speed, high-pressured driver IC (Figure 2).
This module used an integrated thermistor temperature sensor (to use in providing overheated and overflow protection) and has the integrated undervoltage block system function (UVLO). In addition, this module also has suits in the advanced electric current examination technology low side emitter electrode output pin, this technology uses on each electrical machinery phase exterior to diverge carries on the continuous monitoring to the electric current and realizes the short circuit examination and the protection. In brief, this IPM has provided a support safe operation high protection level.
Used in the high side driver part the integration from lifting the diode to add on one to use in the transistor and the driver IC list 15V power source further simplified this power source module use. Because this IPM uses does not need the negative supply to shut off component’s positive grid actuation IGBT completely, therefore only need use the unipolarity power source to be then enough.
NPT IGBT
These IGBT the MOSFET high input impedance characteristic and the double pole transistor’s low pass condition conveyance loss characteristic unifies in together. In the near future the NPT technology will realize improved this kind of component greatly, in the voltage lowered to the 600V condition under the switch characteristic and reduced the production cost, thus caused its depth the operating frequency is 25kHz (or lower) 600V design favor. In fact, in this design uses the IGBT chip can, in the fulfilment decides under the electric current condition to realize reaches as high as 25kHz the turn-on frequency. They are the stable extremely good switches, and has a rectangular reverse bias work area (RBSOA). They can withstand at least 10 祍 short circuit time.
This module uses IGBT another to have the attraction characteristic is provides the finer grid control regarding the component connection and the shutdown. The NPT technology has guaranteed to such as the connection and the turn-off time and so on device parameter stricter controls. Similarly, to maintain the high efficiency, the IGBT switch energy consumption is also maintained at the lowest condition. When IC=5A, VCC=400V and temperature for 25℃, invertor’s master switch energy consumption of (sum of connection and the shutdown loss) is 225 礘. Under the similar condition, the temperature is maintained for 100℃ the time switch energy consumption in lowers to 310 礘 levels.
This province position module can withstand reaches as high as 600V the voltage. It has used monolithic high-pressured driver IC, thus causes the exterior part which needs is the reduction greatly. On this kind of piece the integration rate obviously reduced the module internal wiring and interconnection circuit’s quantity, thus reduced the parasitic loss greatly and has further promoted the three-phase invertor’s efficiency. In brief, it accomplished one to be able to simplify the AC induction and not to brush the DC electrical machinery to use the three-phase invertor structure IPM.
This high-pressured three-phase driver IC some prominent merits are as follows:
* uses from lifting the operation the invariable channel
* allows the negative transient voltage
* dV/dt interference rejection
* wide electronics grid slaving voltage scope (10~20V)
* uses in all channel’s undervoltage block system (UVLO) the function
* uses in the complete 6 driver’s overflow shutdown function
* all channels have the match propagation delay
* overlapping conduction protection logic circuit
* is for the purpose of realizing the anti-noise low di/dt electronics grid driver
* has the programmable external delay to realize the automatic breakdown elimination
It has the electric current jump function which obtains by an external current examination resistor, may terminate the complete 6 outputs. Moreover, to realize the high frequency switch, the electronics grid driver has guaranteed 200ns dead time.
For optimized performance, capacitor (, no matter from lifts DC always linear) to install is approaching the module pin as far as possible the place, reduces the ringing and the EMI question. Although must use the low inductance parallel resistor to come to the three-phase system every one to carry on the electric current examination, but, the pin 12 (VRU), 13 (VRV) and 14 (VRW) and between the corresponding parallel resistor’s print line length must be as far as possible short. These pins are shown in Figure 2.
IR has provided a demonstration circuit wafer and the application software take the reference design suite (IRADK10) a part, by carries on the appraisal to this IPM. This circuit wafer uses in based on one realizing IPM to control ring circuit’s 8 micro controllers, provides uses in electrical machinery’s pulse-duration modulation responsibly (PWM) the output current. Located at this circuit wafer’s on motor-driven invertor module is one three-phase, the 230V input, 0.5 horsepower (350W) exchange PWM driver.
In addition, on this circuit wafer also has one light isolation type serial link connection which (graphical user interface) connects through RS-232 and GUI, as well as to the short circuit, the breakdown and the overheated protection function, high frequency inputs the EMI filter, the connection/to shut off the switch as well as 15V and the 5V power source. Figure 3 showed this demonstration board function diagram.
