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A NOVEL HIGH PERFORMANCE FREQUENCY CHANGER WlTH SlNE WAVES BASED ON "VOLTAGE COMPARlNG-TRACKING-AMPLIFYlNG (CTA)" SCHEME - A probable future competitor for PWM
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| Author(s) |
Qianzhi Zhou; Zhiguo Chen; Peng Jiang; Shaoming Li |
| Abstract |
A novel high-performance frequency-changer based on "Voltage Comparing-Tracking-Amplifying (CTA)" scheme is introduced in this paper. lts commutating method is neither the same as in phase-shift controlling scheme, nor as in duty factor controlling scheme. It keeps the advantages of high efficiency, high power factor like PWM frequency changer, by ingeniously combining a switch circuit with an amplifying circuit, and it gives out sine-wave voltages and sine-wave currents that the loads need without adding complex filter circuit or adopting the controlling means to eliminate harmonic contents for thoroughly solving torque pulsation problems. An interesting linear sine-wave generator as a reference suitable for a CTA frequency-changers it also introduced in this paper a CTA inverter with combination of this signal generator can form a CTA frequency changer. Then this novel frequency changer acquires high efficiency, high power factor and good waveforms synthetically prior to PWM frequency changer. |
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| Filename: | Unnamed file |
| Filesize: | 3.275 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-07-20 by System |
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