This paper presents the design of software and hardware of Power Test without Disassembling System.The main system is based on the MSP4301232 of TI.Instant Rotational Speed is measured in the test system,Instantaneous...This paper presents the design of software and hardware of Power Test without Disassembling System.The main system is based on the MSP4301232 of TI.Instant Rotational Speed is measured in the test system,Instantaneous Acceleration and Instantaneous Power is calculated by using the feature of the MCU with the Least Square Method.At last,Testing Data and Error Analysis are measured.展开更多
Active power filter (APF) using novel virtual line-flux-linkage oriented control strategy can not only realizes no phase-locked-loop (PLL) control, but also achieves a good inhibitory effect to interfere. However, the...Active power filter (APF) using novel virtual line-flux-linkage oriented control strategy can not only realizes no phase-locked-loop (PLL) control, but also achieves a good inhibitory effect to interfere. However, there are some problems in the conventional method, such as the error of amplitude, the shift of phase angle and the non-determinacy of initial oriented angle. In this paper, two one-order low-pass filters are adopted instead of the pure integrator in the virtual line-flux-linkage observer, which can steady the phase and amplitude. Furthermore, an original scheme of harmonics detection under the rotating coordinate is advanced based on the simplified space vector pulse width modulation (SVPWM) strategy. Meanwhile, by using the new SVPWM algorithm, the voltage space vector diagram of the three-level inverter can be simplified and applied into that of two-level inverter, and this makes the control for Neutral Point potential easier.展开更多
文摘This paper presents the design of software and hardware of Power Test without Disassembling System.The main system is based on the MSP4301232 of TI.Instant Rotational Speed is measured in the test system,Instantaneous Acceleration and Instantaneous Power is calculated by using the feature of the MCU with the Least Square Method.At last,Testing Data and Error Analysis are measured.
文摘Active power filter (APF) using novel virtual line-flux-linkage oriented control strategy can not only realizes no phase-locked-loop (PLL) control, but also achieves a good inhibitory effect to interfere. However, there are some problems in the conventional method, such as the error of amplitude, the shift of phase angle and the non-determinacy of initial oriented angle. In this paper, two one-order low-pass filters are adopted instead of the pure integrator in the virtual line-flux-linkage observer, which can steady the phase and amplitude. Furthermore, an original scheme of harmonics detection under the rotating coordinate is advanced based on the simplified space vector pulse width modulation (SVPWM) strategy. Meanwhile, by using the new SVPWM algorithm, the voltage space vector diagram of the three-level inverter can be simplified and applied into that of two-level inverter, and this makes the control for Neutral Point potential easier.
