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One Novel Control Strategy for AC-DC-AC Converter Without DC Link Electrolytic Capacitor


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Figure 1.

Topology of converter without electrolytic capacitor
Topology of converter without electrolytic capacitor

Figure 2.

Dc-link voltage and space voltage vector
Dc-link voltage and space voltage vector

Figure 3.

Inverter equivalent circuit
Inverter equivalent circuit

Figure 4.

Contrast of dc-link voltage of two converters with resistance-inductance load
Contrast of dc-link voltage of two converters with resistance-inductance load

Figure 5.

Contrast of speeds of a motor fed by two converters with vector control
Contrast of speeds of a motor fed by two converters with vector control

Figure 6.

The dc link voltages of two converters with a motor load. (a) the novel. (b) the traditonal
The dc link voltages of two converters with a motor load. (a) the novel. (b) the traditonal

Figure 7.

Stator current response of induction motor starting process
Stator current response of induction motor starting process

Figure 8.

Output voltage of two models of converter. (a) The mathematical model. (b) the novel converter
Output voltage of two models of converter. (a) The mathematical model. (b) the novel converter

HARMONIC OF OUTPUT VOLTAGE OF CONVERTER

ItemfrequencyBasing on the mathematic modelBasing the topology
THD(%)10 Hz2.81.79
25 Hz0.940.49
50 Hz0.20.22
Uo10 Hz76.3776.09
25 Hz190.1190.5
50 Hz379.6379.8

PERFORMANCE CONTRAST OF TWO CONVERTER WITH SAME LOAD OF RESISTANCE AND INDUCTANCE

ItemFrequencyNew converterTraditional converter
THD5 Hz31.130.8
15Hz11.111.2
25 Hz8.16.9
50 Hz0.84.0
Uab(V)5 Hz40.142
15Hz115119.2
25 Hz189.8196.8
50 Hz380.9366.5
η50 Hz1.00.96

Performance contrast of two converters with a MOTOR LOAD

ItemfrequencyNew converterTraditional converter
THD (%)5 Hz19.414.6
15Hz11.26.97
25 Hz6.736.2
50 Hz37.73.5
Uab(V)5 Hz41.540.3
15Hz118.1117.1
25 Hz194.1189.4
50 Hz386.8385.4
η50 Hz1.021.01
eISSN:
2470-8038
Język:
Angielski
Częstotliwość wydawania:
4 razy w roku
Dziedziny czasopisma:
Computer Sciences, other