High Power Laser and Particle Beams, Volume. 32, Issue 2, 025015(2020)
A parameter optimization method of snubber circuit of thyristor under pulse current working condition
Figures & Tables(13)
Fig. 1. Simplified commutation diagram of quench protection system (QPS)
Fig. 3. Test circuit for thyristor reverse recovery characteristic脉冲工况下晶闸管测试实验电路图
Fig. 4. Equivalent circuit diagram of snubber circuit during the reverse recovery process
Fig. 9. Comparison of reverse recovery current and voltage waveforms
Table 1. Specific characteristics of thyristor during reverse recovery process
View tableView in ArticleTable 1. Specific characteristics of thyristor during reverse recovery process
charge voltage/V I p/AI RM/Ad i /dt / (A·µs−1)Q rr/µC1 000 6 622 895 37.10 8 057.3 1 500 9 935 967 50.96 8 412.8 2 000 13 250 1 100 76.54 9 049.2 2 500 16 560 1 206 97.41 9 568.7 3 000 19 880 1 330 121.22 10 153.0 3 500 23 190 1 402 135.97 10 505.4 4 000 26 500 1 523 160.26 11 076.2 4 500 29 810 1 627 179.44 11 517.1 5 000 33 160 1 738 198.98 11 962.4 5 500 36 480 1 846 221.88 12 471.5 6 000 39 790 1 915 238.76 12 849.6 6 500 43 090 2 014 256.90 13 244.7 7 000 46 380 2 132 279.01 13 715.9 7 500 49 880 2 230 298.37 14 122.1
Table 2. Design specification of RC snubber circuit for QPS in LSTF
View tableView in ArticleTable 2. Design specification of RC snubber circuit for QPS in LSTF
symbol parameter value L /µHexternal inductance 25 V dRM,V RRM/Vmax. repetitive peak forward and reverse blocking voltage of chosen thyristor 5 200 d V d/dt crit/(V·µs－1)critical rate of rise of commutating voltage of chosen thyristor(d i /dt =500 A/µs,Tvj =125 ℃)3 000 IRM /Apeak value of reverse recovery current (d i /dt =500 A/µs,Tvj =125 ℃)1 825.7 N Sthyristor series number 2
Table 3. The optimum Rs, Cs and corresponding circuit parameters
View tableView in ArticleTable 3. The optimum Rs, Cs and corresponding circuit parameters
symbol parameter value R s/ΩSnubber Resistance 11.3 C s/μFSnubber Capacitance 0.8 V dmax/VMaximum Reverse Recovery Voltage 6 210 (d V d/dt )max/(V·μs−1)Maximum V d change rate3 600
Table 4. Comparison of electrical parameters
View tableView in ArticleTable 4. Comparison of electrical parameters
optimum parameters Practical parameters I RM /A)1 815 1 835 (d i /dt )0/(A·s－1)309×106 307×106 v dmax/V6 168 6 960 (d V d/dt )max /(V·µs－1)3 598 6 285
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Wei Tong, Hua Li, Peng Fu, Kun Wang, Ul Hassan Mahmood, Zhiquan Song. A parameter optimization method of snubber circuit of thyristor under pulse current working condition[J]. High Power Laser and Particle Beams, 2020, 32(2): 025015
Paper Information
Received: Jul. 31, 2019
Accepted: --
Published Online: Mar. 18, 2020
The Author Email: Song Zhiquan (zhquansong@ipp.ac.cn)
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