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To generate the reference waveforms of the switch-linear hybrid flexible waveform power amplifier, an arbitrary waveform generator is implemented in this paper. With the advantages of the DDFS, such as fast setting time, high frequency resolution, continuous-phase, short switching time, low phase noise, there is significant interests in exploring the arbitrary waveform generator based on DDFS to replace...
A four-quadrant controller of 5kW switched reluctance motor drives for electric vehicle (EV) is presented in this paper. Considering the characteristics of electric vehicle, this paper ascertains the control strategy of SRM four-quadrant operation for EV. According to the control schemes of switched reluctance motor drives, an integrated scheme is designed. A high-performance fully digital sliding...
This paper introduces an inter-harmonics detection device based on DSP. The major characteristic of the device is that it can detect the inter-harmonics based on the generalized dk-qk rotational coordinate transform theory. To increase the distinguish ability between two close frequencies, this paper introduces a flex time coordinate method, which decreases the spectral leakage greatly. The sampling...
In this paper, we describe a new optimum design procedure for speed controller considering anti-windup for PMSM drive system. Tuning of speed controller is complicated by nonlinearities. Usual practice obtains controller settings with conventional linear analysis methods and then tunes the settings using trial-and-error methods during commissioning. An alternative approach, using particle swarm optimization...
In this paper, a flexible power supply method for Electric Arc Furnace (EAF) is presented in which Unified Power Flow Controller is used, when considering the impaction in power-grids caused by electric arc furnace systems. The fuzzy algorithm is implemented in the UPFC controller, and the control system of arc furnace is designed. Based on the non-linear time-variable resistance model, the power...
This paper proposes a residual capacity estimator with higher accuracy for lead-acid batteries. The calculation method is using different discharge capacity rate of a battery in different discharge current to calculate state of charge. Therefore, curve fitting state of charge estimation has the ability of revising value of state of charge with the changing of lode, and this improves Coulomb state...
The paper mainly introduce the relationship between embedded technology and digital manufacturing, describes the application of embedded technology in digital manufacturing fields, and provides a typical example-NC system based on ARM and DSP, in which the ARM takes charge of the G code input, compiling and interpretation, the simulation display, the user's interface and the network interface etc,...
In this paper, a new kind of high-voltage continuous reactive power compensator which was based on soft switching was introduced and a DSP+CPLD-based controller was designed. The hardware design and software flow chart was described in detail. The DSP and CPLD are used to design a controller , making its construction compact .thus improving its reliability and real-time characteristic.
This paper presents a new field-weakening control scheme for surface-mounted permanent-magnet synchronous motor (SMPMSM) drives. The proposed method can determine either the constant torque limit control mode or the field-weakening control mode which should be applied to the drive under different operation conditions and variations of system parameters. In addition, the minimum copper loss operation...
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