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This paper proposes a compensation method for precise position-sensorless control using high-frequency pulsating voltage injection and the criterion for applicability of the proposed compensation method is discussed. Theoretical background of the proposed 3-dimensional compensation table as well as the implementation method is described and it is disclosed that the real rotor position and the convergent...
This paper presents a high performance 12 kW motor drive system for an aerospace application. In order to achieve higher power density and reliability, the system uses a PMSM motor, SiC MOSFET inverter, high performance PWM control, and liquid cooling with phase change material. A power density of 33 KW/KG was achieved for the power inverter and control electronics excluding the cooling loop, and...
This paper proposes a novel type of an active common noise canceler (ACC) combining feedforward and feedback control. The ACC attenuates the common-mode (CM) voltage and suppresses EMI emissions by adding the CM voltage of reverse polarity to the CM voltage generated by inverters in AC motor drive system. The proposed ACC uses feedforward and feedback control whereas the original ACC [19] uses feedforward...
Post-Silicon validation is a major bottleneck in System-on-Chip (SoC) design methodology due to increasing design complexity and it is very difficult to detect all the design flaws at Pre-Silicon verification level. Timer module in an automotive microcontroller is used for many applications like power train, power steering, transmission control and chassis so validation of the timer module is very...
Gallium nitride (GaN) switches have superior switching performance when compared to the traditional Si technology. Therefore, GaN switches are an appealing option for power converters and electrical drives. In this paper, considerations for a high-speed electrical drive with inverter switching frequency of 1 MHz are presented, along with simulation results of the motor control of the drive.
This paper proposes a novel integrated control system including PMSM drive and vehicle-to-grid (V2G) technology based on open winding PMSM. It realizes motor drive mode and bidirectional energy flow for Electric Vehicles in V2G control mode. These modes can be switched easily and smoothly according to commands from integrated controller. Compared with the traditional EVs control system which controls...
The Sun has the potential to provide 89,300 tera Watts of power to our planet. Our ability to convert even a fraction of this energy for human use makes a significant impact on current energy generation and consumption trends. World-wide we now add more renewable energy capacity every year than (combined) fossil fuel energy capacity. Solar panels provide a reliable, renewable, non-polluting energy...
This paper proposes a mixed dq-control scheme for a sensorless PMSM drive to improve input power factor with an electrolytic capacitor-less bridge rectifier. Instead of using bulky traditional electrolytic capacitor, a very small film capacitor is adopted to achieve high input power factor with improved power density and reliability. However, due to large dc-link voltage fluctuations, deterioration...
This paper proposes a novel pulse-width-amplitude-modulation (PWAM) method for three-phase quasi-Z source inverter system in motor drive application. It is demonstrated that it operates at only 1/3 switching frequency of traditional PWM methods, with less harmonic distortion. As a result, switching actions and losses are also reduced significantly. With the proposed modulation, the required capacitance...
In this paper, selection of optimum DC link capacitor for Integrated Modular Motor Drives (IMMD) is presented. First, a review of IMMD technologies is given and current research and future prospects are studied. Inverter topologies and gate drive techniques are evaluated in terms of DC link performance. The urge for volume reduction in IMMD poses a challenge for the selection of optimum DC link capacitor...
This paper proposes a reducing technique of carrier noise of PWM inverters without increasing the carrier frequency during zero-speed drive of a permanent magnet motor. The feature of the proposed technique is that the frequency component of the carrier noise is diffused by zero-sequence voltage. In particular, the zero-sequence voltage is randomized by the M-sequence signal and added to the voltage...
A complete test for conducted EMI from the direct current fed (DC-fed) alternating current (AC) motor drive system in an electric vehicle (EV) under load conditions is set up to analyze the conducted voltage and current of high voltage DC cables in a frequency range of 150 kHz–108 MHz at 500rpm and 2500rpm with 50Nm load torque of the EV motor with space vector pulse width-modulation (SVPWM) control...
Next-Generation semiconductor devices like Silicon Carbide (SiC) or Gallium Nitride (GaN) have been introduced for many applications in power electronics due to their outstanding characteristics of high frequency and low loss operation [1].
Multilevel converters can generate the multilevel output voltage using internal voltage sources. Thus, they can reduce harmonics and EMI. From the practical point of view, implementation of the source of multilevel voltage without increase in the volume of the converters is strongly desired. In this context, the flying capacitor multilevel converters are most promising candidates for the practical...
In this paper, a new dual-winding fault-tolerant permanent magnet (DFPM) motor drive with three-phase four-leg inverter is proposed and investigated. The proposed DFPM motor drive with three-phase four-leg inverter offers the advantages of high power density, high efficiency, high utilization rate and high fault-tolerance. To achieve the fault-tolerant performance, a new fault-tolerant control strategy...
This paper develops the self control strategy of the Brushless DC Motor (BDCM) fed by the reduced Three Switch Three Phase Inverter (TSTPI) using the Xilinx Kintex 7 Field Programmable Gate Arrays (FPGA) package. This proposed command begins with a test simulation on the numerical environment Matlab using in the first step the Simulink toolbox and in the second step the Xilinx System Generator (XSG)...
This paper presents three different virtual space vector based strategies to keep the neutral point potential fluctuation (NPPF) low in the field weakening region for an interior permanent magnet synchronous machine (IPMSM) drive. Out of three strategies, one even completely eliminates the NPPF. A detailed analytical study to demonstrate the root cause behind the high NPP fluctuation in the field...
Inverter dead-time is known to make open-loop induction motor drives oscillatory, while operating at light-loads in particular. While dead-time compensation schemes exist, precise compensation of the same is often challenging as it involves factors such as device and driver delays and switching transition times, which are difficult to be quantified accurately. Hence, the effect of dead-time could...
This paper presents the analysis, design and comparison of performance of a scheme for power factor correction for the brushless dc motor drive. A front end diode bridge rectifier (DBR) with dc link capacitor at the input side of brushless dc motor (BLDC) draws peaky current which then leads to high value of Total Harmonics Distortion (THD) and poor power factor. This problem can be eliminated by...
Large dv/dt and di/dt due to power device fast switching within a DC-fed voltage-type PWM inverter of high power density and high-efficiency motor drive system for electric vehicle (EV) always introduce unwanted high frequency noise current through parasitics/distributed parameters of the motor drive system. The complete test setup for conducted-EMI emission from the AC motor drive system of EV are...
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