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          "

          ղ    Ϊҳ
          Ʒ
          > IGBT >

          IGBTƽIͺ͡T͵·ıȽϷ

          ժҪ̫UPSIJϷչгIJЧʵҪҲԽԽƽ˽ṹӦ˶֪봫ͳƽṹƽṹʹIGBTϵѹ֮гСĵЧʸߵҪеƽоĻ”I”ͺ”T”͵·IJ˽зڲηĻԿعܵĹѡȡĵȷ˷ͱȽѡȡһʺϵƽ·Դhttp://www.minaco-uk.com/bl/239.html
          һƽ·ʾͼ
          ĿǰIGBTƽ˽ṹкܶ˽ṹΪƽ“I”ͺƽ“T”ֽṹӲͬз
                 ͼ12ʾƽ·ͼΪֵ·ĸIGBTع·ͼеĵзʽǽǰ߳ΪI߳ΪT
                 ƽ·ͨİŵ·ΪеԶԸƲĶкܺõЧ
          ƽ1ε·ʾͼ
          ͼ1. ƽ“1“ε·ʾͼ
          ƽTε·ʾͼ
          ͼ2. ƽ“T“ε·ʾͼ
          ֵ·IJη
          Ϊ˶ֵ·ĺ͹бȽֵ·IJͼ3ͼ4ʾ
          ǶԲͼIJ˵
          1.ͼbusҸԪΪԪ
          2.źŵķʽ
          ֵ·Ϊ㱾ѡͬźŲźŵľƷʽڲο[1][2]ͼʾQ1,Q3һPWMʱ䣩Q2,Q4 һPWMʱ䣩,Q1Q4֮Ҳʱ
          3.ͼмеiLͬҺе״̬ļοͼҲбʶ
          4.VLʾ뿪عĵѹͼпԿֵ·˵ѹͬ
          5.VLĸߵƽֵΪ1Vbusƽֵ߶ȱԴΪο
          1ƽ·η
          ͼ3 1ƽ·η
          Tƽ·
          ͼ4Tƽ·
          ֵ·ıȽ
          1عѹıȽϣ
          ƽI͵·4IGBTܾͬĵѹTQ1&Q4ܳĵѹֱĸΪ600VʱI4IGBTϵѹΪ600V/650V, TQ1&Q4Ϊ1200V. 1200VIGBTоƬ600V/650VоƬиĿļͨζоƬķȸҪĹоƬоƬɱҲȻ֮
          ȻʵI͵·عܵĵѹ2BUSѹʱԪIJعܳܵĵĵѹȫͬΪ˱֤عܵİȫI͵·пعҲӦճ2BUSѹȥʵʽǶȳڿѹѡ1͵·û̫
          2ĵıȽ
          Ҫָĸعܿغ͵ͨ
          Ϊͨ·԰յ·ֳ״̬ղͬɫѱʾͼ34ο
          i.bus״̬
          A, 1͵·+BUS,Q1,Q2
          İLoss_Q1_turnon&turnoff Loss_Q1_On Loss_Q2_On
          B, T͵·+BUSQ1
          İLoss_Q1_turnon&turnoff Loss_Q1_On
          Ƚϣ״̬ͨͼпԿLoss_Q1_turnon&turnoff1͵·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״̬1͵·T͵·һQ3ĵͨ
          iii.BUS״̬
          A, 1͵·ɵоQ1diode,Q2diodebus
          İ Loss_Q1diode_turnon&turnoff&on
          Loss_Q2diode__turnon&turnoff&on
          B, T͵·ɵоQ1diodebus
          İ Loss_Q1diode_turnon&turnoff&on
          Ƚϣ״̬1͵·T͵·һQ2ĵͨ
          iv.bus״̬
          A, 1͵·ɸbusQ1diode,Q2diode
          İ Loss_Q3diode_turnon&turnoff&on
          Loss_Q4diode__turnon&turnoff&on
          B, T͵·ɸbusQ1diode
          İ Loss_Q4diode_turnon&turnoff&on
          Ƚϣ״̬һ͵·T͵·һQ3ĵͨ
          v.еiL>0״̬
          A1͵·GNDD1Q2
          İLoss_D1 Loss_Q2
          BT͵·GNDQ2Q3diode
          İLoss_Q2 Loss_Q3diode
          Ƚϣ״ֵ̬·Ľӽ
          vi.еiL<0״̬
          A1͵·ɵQ3D2GND
          İLoss_Q3 Loss_D2
          B, T͵·ɵQ3Q2diodeGND
          İLoss_Q2 Loss_Q3diode
          Ƚϣ״ֵ̬·Ľӽ
          ۣͨϱȽϿԿе״̬״̬T͵·Ķ1͵·
          3ԪıȽ
          ˽ṹͼ׿ԿT͵·Ҫ1͵·Diodeڼٿռкô
          4.ʱͬ
          ƽIȹضQ1/Q4,ٹضڹQ2/Q3,ֹĸߵѹϵTʱϵҪIʱҪ4ԴT͹伫ֻҪ3Դ
           ITڹӽ1ʱƵ>16KHz,ƽIͣ600VĸЧʸƵʼʱ<16KHzƽTͣ1200VĸЧʸϵͳʱӦݲͬĿƵȥѡһЧʸߵ˽ṹ
          5.·ͬ
                Tڹ֮ת·ΪһI·ͬΪ̻·볤·÷ƽIʱҪעɢѹ
          ۣ
          ͨĵķԿTͺ1ƽ·Ƚѹ1͵·T͵·ȻʵӦýǶȷķTҪ1ԪTDiode
          ձĵķڽСĺͼСռ䷽T͵·Ƚ

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            ӹ-Ϸ
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