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Power losses of the motor drive depend to a large extent on the switching frequency, currents, and supply voltage of the power inverter. As these three parameters affect the motor torque and speed, they must be considered in the synthesis of the inverter adjustment algorithms. In this paper, a new toolbox for exploring the modulation techniques is described. Some methods of the load-dependent control...
This paper describes a five-level diode-clamped PWM inverter intended for a medium-voltage motor drive without regenerative braking. It is equipped with a specially-designed circuit that plays an important role in achieving voltage balancing of the four split dc capacitors connected in series at the dc input terminals of the inverter. The voltage-balancing circuit frees the inverter to concentrate...
Battery is a commonly used energy storage component of the ESS (energy storage system) widely applied in the development of the PHEVs (plug-in hybrid electric vehicles). With the different system configurations and parameters selection, battery will undertake the different electrical stress, e.g., loss and current ripple which are believed to pose the discount of its longevity. This paper addresses...
This paper presents simulation and hardware implementation of 3-phase Permanent Magnet Brushless DC (PM BLDC) motor drive for low power applications. For this drive system, pulse width modulation (PWM) control has been implemented for a 120-degree six-step trapezoidal PM BLDC motor drive. The processor used is PIC16F877 which is a common, flash-able and low-cost microcontroller unit (MCU) with functions...
The three-phase motor control system mostly used the structure of three-phase full-bridge inverter. Because the full-controlled device used was not an ideal device, during the process of turning on and off, delay existed in the device. In the design of control system, to assure that the full-controlled tubes up and down of the same arm bridge do not turn on simultaneously, dead time was usually added...
In this paper, we present a successful operation of Gallium Nitride(GaN)-based three-phase inverter with high efficiency of 99.3% for driving motor at 900W under the carrier frequency of 6kHz. This efficiency well exceeds the value by IGBT (Insulated Gate Bipolar Transistor). This demonstrates that GaN has a great potential for power switching application competing with SiC. Fully reduced on-state...
Power Factor Correction (PFC) is used in power systems operating from single phase AC to correct for the non linearity of the rectifier. Use of PFC in motor drives is increasing because of increased regulation from the power utility side. However, integration of PFC and field oriented control of motor on a single controller remains challenging from a processor bandwidth point of view while keeping...
Diode clamped multi-level inverter (DCMLI) has wide application prospect in high-performance medium or high voltage adjustable speed drive systems. In this paper, a novel SVPWM (Space Vector Pulse Width Modulation) algorithm for DCMLI fed induction machine drive is proposed. This algorithm transforms the reference space vector into the non-orthogonal coordinate system. It overcomes the shortcoming...
In this paper, The rectifier and inverter in three phase PWM drive motor system is studied. Based on Fourier Transform, Mathematical models of common mode noise source of rectifier are builded. A general modeling method for common mode noise source of inverters is presented based on the principle of the double Fourier integral. PWM carrier wave and fundamental wave function are described by two independence...
Cost minimizing of the electrical machine drives is more attractive for low cost applications. The low cost BLDC driver is achieved by the reduction of switch device, cost down of control, and saving of hall and current sensors. In this paper, a simple position sensorless control strategy for four-switch three-phase BLDC motor drives using single current sensor is proposed. The whole working process...
A couple of decade ago when auto engineers decided to increase the voltage level of electrical power system drive, it was the advancement of silicon technology supporting their dream. Today the power electronics circuits play an important role in the success of electric, hybrid and fuel cell vehicles. Typical power electronics circuits in hybrid vehicles include electric motor drive circuits and DC/DC...
A new adjustable-speed drives (ASD) system based on the high-performance Z-source inverter. It can overcome limitations of conventional Z-source inverter system. The proposed system can operate at wide range load with small inductor. It eliminates the possibility of the DC-link voltage aberrances; simplify the Z-source network inductor and controller design. It increase the inverter modulation index...
The global desire to reduce the vehicle emissions and improve fuel economy accelerated the development of Hybrid Electric Vehicle (HEV). The technology advancements in the area of electric drive systems, battery technologies, fuel cells and the internal combustion engine (ICE) resulted in highly efficient HEV. In this paper the hardware details of three phase, 50 Hz, 6 KW, 180° conduction mode of...
A new method to reduce common-mode (CM) EMI emission at the dc input of variable-speed motor drives is presented. Unlike conventional passive or active filtering techniques that rely on impedance mismatch or active noise cancellation, the proposed method uses a passive circuit to cancel the CM current produced by the motor drive. In the proposed approach, a start-connected three-phase RC circuit is...
This paper presents a FPGA-based virtual motor drive system featuring two Permanent Magnet Synchronous Machine (PMSM) drives made with two-level IGBT/GTO inverters model with full fault capability. The inverters are implemented on the FPGA with a nodal solver, using floating point arithmetic, and support individual component faults, like a single IGBT open fault, as well as other non-standard modes,...
The control of Series Active Filter (SAF) to meet IEEE 519 standard for harmonic voltage source front-end based multiple adjustable speed motor drives, is reported in this paper. The series active filter design, control, implementation and issues in the practical application for utility interface of multiple three-phase six-pulse diode rectifier with dc side capacitor fed 480V, 150kW motor drives...
This paper provides an alternative to the conventional back-to-back converter currently used within appliance motor drives. The novel approach suggests using IPM/IRAMS modules in building the power stage. Moreover, this novel power stage configuration does not include the bulky DC bus capacitor, and reduces the filtering requirements, resulting in a smaller and more reliable assemble. Complete description...
GaN is very promising for power switching transistors taking advantages of the high breakdown strength with high saturation electron velocity. The lateral and compact device configuration enables high speed switching with reduced on-state resistance and parasitic capacitance. In this paper, state-of-the-art device technologies of GaN transistor and its monolithic integration for switching applications...
As far as PWM inverters are concerned, it is well known that the common-mode voltage generated during its normal operation produces high-frequency earth return currents which cause several problems in industrial electric systems. The computational study of such currents requires the appropriate modeling of the inverter, transformer, motor and cable for high-frequency phenomena studies. Regarding the...
A Hard Disk Drive (HDD) spindle motor is a brushless dc (BLDC) motor which has been used in high speed applications due to its high efficiency and good controllability. This paper presents a novel topology for a low cost converter which drives a spindle motor at high speed with high starting torque using the bipolar starting and unipolar running algorithm. This topology is simple and uses only eight...
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