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    ղ    Ϊҳ
    Ʒ
    > IGBT >

    IGBTƽIͺ͡T͵·ıȽϷ

    ժҪ̫UPSIJϷչгIJЧʵҪҲԽԽƽ˽ṹӦ˶֪봫ͳƽṹƽṹʹIGBTϵѹ֮Ůֱ-Ůֱ-עƽ̨funֱгСĵЧʸߵƲŮֱ-Ůֱ-עƽ̨funֱҪеƽоĻ”I”ͺ”T”͵·IJ˽зڲηĻԿعܵĹѡȡŮֱ-Ůֱ-עƽ̨funֱĵȷ˷ͱȽѡȡһʺϵƽ·Ůֱ-Ůֱ-עƽ̨funֱԴhttp://www.empowered-teacher.com/bl/239.html
    һƽ·ʾͼ
    ĿǰIGBTƽ˽ṹкֲܶŮֱ-Ůֱ-עƽ̨funֱ˽ṹΪƽ“I”ͺƽ“T”ֽṹӲͬз
           ͼ12ʾƽ·ͼΪֵ·Ůֱ-Ůֱ-עƽ̨funֱĸIGBTع·ͼеĵзʽŮֱ-Ůֱ-עƽ̨funֱǽǰ߳ΪI߳ΪT
           ƽ·ͨİŵ·ΪеԶԸƲĶкܺõЧŮֱ-Ůֱ-עƽ̨funֱ
    ƽ1ε·ʾͼ
    ͼ1. ƽ“1“ε·ʾͼ
    ƽTε·ʾͼ
    ͼ2. ƽ“T“ε·ʾͼ
    ֵ·IJη
    Ϊ˶ֵ·ĺ͹бȽֵ·IJŮֱ-Ůֱ-עƽ̨funֱͼ3Ůֱ-Ůֱ-עƽ̨funֱͼ4ʾŮֱ-Ůֱ-עƽ̨funֱ
    ǶԲͼIJ˵Ůֱ-Ůֱ-עƽ̨funֱ
    1.ͼbusҸԪΪԪ
    2.źŵķʽ
    ֵ·Ůֱ-Ůֱ-עƽ̨funֱŮֱ-Ůֱ-עƽ̨funֱΪ㱾ѡͬźŲŮֱ-Ůֱ-עƽ̨funֱźŵľƷʽڲο[1][2]ͼʾQ1,Q3һPWMʱ䣩Q2,Q4 һPWMʱ䣩,Q1Q4֮Ҳʱ
    3.ͼмеiLͬŮֱ-Ůֱ-עƽ̨funֱҺе״̬ļοͼҲбʶŮֱ-Ůֱ-עƽ̨funֱ
    4.VLʾ뿪عĵѹͼпԿֵ·˵ѹͬ
    5.VLĸߵƽֵΪ1Vbusƽֵ߶ȱԴΪο
    1ƽ·η
    ͼ3 1ƽ·η
    Tƽ·
    ͼ4Tƽ·
    ֵ·ıȽ
    1Ůֱ-Ůֱ-עƽ̨funֱŮֱ-Ůֱ-עƽ̨funֱعѹıȽϣ
    ƽI͵·4IGBTܾͬĵѹŮֱ-Ůֱ-עƽ̨funֱTQ1&Q4ܳĵѹŮֱ-Ůֱ-עƽ̨funֱֱĸΪ600VʱI4IGBTϵѹΪ600V/650V, TQ1&Q4Ϊ1200V. 1200VIGBTоƬ600V/650VоƬиĿļͨζоƬķȸҪĹоƬоƬɱҲȻ֮
    ȻʵI͵·Ůֱ-Ůֱ-עƽ̨funֱعܵĵѹ2BUSѹʱԪIJŮֱ-Ůֱ-עƽ̨funֱعܳܵĵĵѹȫͬŮֱ-Ůֱ-עƽ̨funֱΪ˱֤عܵİȫŮֱ-Ůֱ-עƽ̨funֱI͵·пعҲӦճ2BUSѹȥʵʽǶȳŮֱ-Ůֱ-עƽ̨funֱڿѹѡ1͵·û̫
    2ĵıȽ
    ҪָŮֱ-Ůֱ-עƽ̨funֱĸعܿغ͵ͨ
    Ϊͨ·԰յ·ֳ״̬ղͬɫѱʾͼ3Ůֱ-Ůֱ-עƽ̨funֱ4Ůֱ-Ůֱ-עƽ̨funֱοŮֱ-Ůֱ-עƽ̨funֱ
    i.bus״̬Ůֱ-Ůֱ-עƽ̨funֱ
    A, 1͵·+BUS,Q1,Q2Ůֱ-Ůֱ-עƽ̨funֱ
    İLoss_Q1_turnon&turnoff Loss_Q1_On Loss_Q2_On
    B, T͵·вŮֱ-Ůֱ-עƽ̨funֱ+BUSQ1
    İLoss_Q1_turnon&turnoff Loss_Q1_On
    Ƚϣ״̬ͨͼпԿLoss_Q1_turnon&turnoffŮֱ-Ůֱ-עƽ̨funֱ1͵·T͵·һQ2ĵͨ
    ii.bus״̬
    A, 1͵·ɵ,Q3,Q4bus
    İLoss_Q4_turnon&turnoff Loss_Q3_On Loss_Q4_On
    B, T͵·ɵ,Q4bus
    İLoss_Q4_turnon&turnoff Loss_Q4_On
    Ƚϣ״̬Ůֱ-Ůֱ-עƽ̨funֱ1͵·T͵·һQ3ĵͨ
    iii.BUS״̬
    A, 1͵·Ůֱ-Ůֱ-עƽ̨funֱɵоQ1diode,Q2diodebusŮֱ-Ůֱ-עƽ̨funֱ
    İ Loss_Q1diode_turnon&turnoff&on
    Loss_Q2diode__turnon&turnoff&on
    B, T͵·Ůֱ-Ůֱ-עƽ̨funֱŮֱ-Ůֱ-עƽ̨funֱɵоQ1diodebus
    İ Loss_Q1diode_turnon&turnoff&on
    Ƚϣ״̬Ůֱ-Ůֱ-עƽ̨funֱ1͵·T͵·һQ2ĵͨ
    iv.bus״̬
    A, 1͵·вŮֱ-Ůֱ-עƽ̨funֱɸbusQ1diode,Q2diode
    İ Loss_Q3diode_turnon&turnoff&on
    Loss_Q4diode__turnon&turnoff&on
    B, T͵·Ůֱ-Ůֱ-עƽ̨funֱɸbusQ1diodeŮֱ-Ůֱ-עƽ̨funֱ
    İ Loss_Q4diode_turnon&turnoff&on
    Ƚϣ״̬һ͵·T͵·һQ3ĵͨ
    v.еiL>0״̬
    A1͵·Ůֱ-Ůֱ-עƽ̨funֱGNDD1Q2вŮֱ-Ůֱ-עƽ̨funֱ
    İLoss_D1 Loss_Q2
    BT͵·GNDQ2Q3diode
    İLoss_Q2 Loss_Q3diode
    Ƚϣ״ֵ̬·Ľӽ
    vi.еiL<0״̬
    A1͵·ɵQ3Ůֱ-Ůֱ-עƽ̨funֱD2GND
    İLoss_Q3 Loss_D2
    B, T͵·ɵŮֱ-Ůֱ-עƽ̨funֱQ3Q2diodeGND
    İLoss_Q2 Loss_Q3diode
    Ƚϣ״̬²Ůֱ-Ůֱ-עƽ̨funֱֵ·ĽӽŮֱ-Ůֱ-עƽ̨funֱ
    ۣͨϱȽϿԿе״̬״̬T͵·Ķ1͵·
    3ԪıȽ
    ˽ṹͼ׿ԿT͵·Ҫ1͵·DiodeŮֱ-Ůֱ-עƽ̨funֱڼٿռкô
    4.ʱͬ
    ƽIȹضQ1/Q4,ٹضڹQ2/Q3,ֹĸߵѹϵ𻵲Ůֱ-Ůֱ-עƽ̨funֱTʱϵҪⲨŮֱ-Ůֱ-עƽ̨funֱIŮֱ-Ůֱ-עƽ̨funֱʱҪ4ԴT͹伫Ůֱ-Ůֱ-עƽ̨funֱֻҪ3ԴŮֱ-Ůֱ-עƽ̨funֱ
     ITŮֱ-Ůֱ-עƽ̨funֱڹӽ1ʱŮֱ-Ůֱ-עƽ̨funֱƵ>16KHz,ƽIͣ600VĸЧʸƵʼʱ<16KHzŮֱ-Ůֱ-עƽ̨funֱƽTͣ1200VĸЧʸŮֱ-Ůֱ-עƽ̨funֱϵͳʱŮֱ-Ůֱ-עƽ̨funֱӦݲͬĿƵȥѡһЧʸߵ˽ṹŮֱ-Ůֱ-עƽ̨funֱ
    5.·ͬ
          Tڹ֮ת·Ϊһ²Ůֱ-Ůֱ-עƽ̨funֱI·ͬŮֱ-Ůֱ-עƽ̨funֱΪ̻·볤·Ůֱ-Ůֱ-עƽ̨funֱ÷Ůֱ-Ůֱ-עƽ̨funֱƽIʱҪעɢѹⲨŮֱ-Ůֱ-עƽ̨funֱ
    ۣ
    ͨĵķԿTͺ1ƽ·Ƚѹ1͵·T͵·ȻʵӦýǶȷŮֱ-Ůֱ-עƽ̨funֱŮֱ-Ůֱ-עƽ̨funֱŮֱ-Ůֱ-עƽ̨funֱķTҪ1Ԫ沨Ůֱ-Ůֱ-עƽ̨funֱTDiodeŮֱ-Ůֱ-עƽ̨funֱ
    ձĵķڽСĺͼСռ䷽T͵·Ƚ

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