AC-AC变换技术

1、返回mnnD123456ABCD654321DCBATitleNumberRevisionSizeBDate:14-Dec-2005Sheet of File:C:Program FilesDesign Explorer 99 SEExamplesdi5.ddbDrawn By:T1T2ZZVSVSSVo+-+Voa 理想开关 b 晶闸管开关图7-1 通断控制图7-2 单相通断控制输出波形22()inOV Z nTV Znm T22OinVnVnmovvsVnTDVmntt422sin21sin4ormsssVVdV 2sin24ovvsVTV7-4电压传输比与延迟角关系tsinoosdiLR

2、iVtdt()sinsinRtsLoViteZ RLLRZtan,2250Hz40.001LH2R 7-5 延迟角控制的输出电压、电流图(负载)2sinosdiLVtdt( )sin()coscosssVit d tLVL0it22图7-6 电感负载时输出电压和电流（ ）2221sinormssVVtd t 2()sin2ormsvvsVTV422(2)(2) ()3() (3)58图7-7 电感负载时输出电压和电流（ ）58sinsin(23)sin(43)ANpBNpCNpvVtvVtvVt3sin(6)3sin(2)3sin(76)ABPBCPCAPvVtvVtvVt123456ABCD

3、654321DCBATitleNumberRevisionSizeBDate:23-Dec-2005Sheet of File:E:MyDesign-li5.DdbDrawn By:T1T4T3T6T5T2RRRABCabc图7-8 负载为Y连接的三相交流控制器 图7-9 三相相电压和线电压波形 ANvBNvCNvANvBNvCNv234353732330AKvT1T2T2T3T3T4T4T5T5T6T6T1换相T6T2换相T1T3换相T2T4换相T3T5换相T4T6换相T5T1图7-10 导通顺序和换向图16TLoadT121230aNABbNABcNvvvvv 312TLoadT12203

4、312aNACbNcNACvvvvv 0122312aNbNBCcNBCvvvvv 1214230aNBAbNBAcNvvvvv 124503312aNCAbNcNCAvvvvv 01522312aNbNCBcNCBvvvvv ANv132132ABANACvvv38图7-11 三相输出电压波形123456ABCD654321DCBATitleNumberRevisionSizeBDate:6-Jan-2006 Sheet of File:E:MyDesign.ddbDrawn By:ZvisvoS1GTRS2GTRS1GTRS2GTRD1DIODED2DIODEab图7-12 PWM控制图7

5、-13 PWM控制室的输出波形212indn212idn 212idn 1,2,3ina b c图7-14 电力半导体开关构成双向开关设输入电压为 ，输出电压基波有效值由下式计算：对图7-13进行谐波分析可以发现，最低次谐波较电源输入频率高出很多（倍），因此虑除较为容易。sinpVt(21)222(21)121sin () ()nidnpidinvoVt dt 123456ABCD654321DCBATitleNumberRevisionSizeBDate:8-Jan-2006 Sheet of File:E:? ? ? ? ? MyDesign.ddbDrawn By:S1GTRS2GTRS

6、1GTRS2GTRD1DIODED2DIODEabD2DIODED4DIODED3DIODED1DIODED?GTRc返回21 300OTs234123456ABCD654321DCBATitleNumberRevisionSizeBDate:6-Mar-2008 Sheet of File:E:? ? dmld? MyDesign.ddbDrawn By:T1T4T2T3T1T4T2T3LVo图7-15 单相-单相四象限周波变换器 图7-16单相-单相四象限周波变换器输出电压（ ）6123456ABCD654321DCBATitleNumberRevisionSizeBDate:7-Jan-

7、2006 Sheet of File:E:? ? ? ? ? MyDesign-li5.DdbDrawn By:ABbzzzLLLOT1T3T5*1+a-*4T2T6T4T1T3T5*3+-*6T2T6T4T1T3T5*5+-*2T2T6T4Cc图7-17 三相-三相半波周波变换器23233*6*1*1*2*2*3*3*4*4*5*5*6*6*1t*1*2*3*4*5*6*6T0T0/62T0/63T0/64T0/65T0/6T1T3T5T1T3T6T2T4T6T2T4T6T2T5T1T3T5T1T4T6T2T4T6T3T5T1T3T5T2T4T6图7-18三相-三相半波周波变换器换流次序11

8、11111111,2222222222111110,0,0,0,0,2222211111,0,0,0,0,02222211111,0,0,022222aoABACBCBACACBABACBCBABACACBABACBCBACACBABboABACBCBACAvvvvvvvvvvvvvvvvvvvvvvvvvvv ,0,0,1111111111,2222222222111110,0,0,0,0,22222111110,0,0,0,0,2222211111,0,0,022222CACBABACBCBACACBABACACBCBACACBcoCBABACBCBACACBABACBCvvvvvvvvvvvvvvvvvvvvvvvvvv,0,0,1111111111,2222222222BCBACACBABACBCBACACBvvvvvvvvvv123456ABCD654321DCBATitleNumberRevisionSizeBDate:8-Jan-2006 Sheet of File:E:? ? ? ? ? MyDesign-li5.DdbDrawn