The analysis and design of current regulators for multiphase AC loads in machines is presented using complex vector notation. use notation provides a way comparing the performance controller topologies through their root locus frequency-response functions. Limitations synchronous frame proportional plus integral regulator are outlined several ways improving its suggested investigated.

This paper presents an improved method of estimating flux angle, rotor position, and velocity by tracking the position spatial saliencies in AC machine. Specifically, a machine model is presented which accurately models behavior machines with multiple harmonic saliencies. The effects on estimation analyzed, methods are utilizing to provide wide bandwidth, high accuracy estimates velocity.

This paper analyzes the behavior of discrete-time current regulators for ac machines operating at high ratios fundamental-to-sampling frequencies, a situation common high-speed automotive drives and large-traction drives. At highly oscillatory, or unstable, response can occur if regulator design does not properly incorporate effects discrete nature controller, including delays between sampling signals application voltage commands through pulse-width modulation (PWM). investigates these...

The analysis and design of current regulators for multi-phase AC loads is presented using complex vector notation. use notation provides a way comparing the performance controller topologies through their root locus frequency response functions. Limitations in synchronous frame PI regulator are outlined several ways improving its suggested investigated.

The analysis and design of current regulators for polyphase AC loads is presented using complex vector notation. motor regulation problem analyzed by studying both the command tracking disturbance rejection capability regulator. use notation generalization classical control tools like root locus, frequency-response functions dynamic stiffness to vectors provide a way comparing performance different controller topologies. Limitations in synchronous frame proportional integral regulator are...

This paper proposes a method to estimate the magnet temperature in surface permanent-magnet machines using high-frequency carrier signal injection. The injection of signal, superimposed on fundamental excitation, allows estimation stator impedance, which is function both and rotor impedances. magnets shown have significant weight overall from it can be estimated. injected intermittently order minimize potential adverse effects normal operation machine. first explains physics behind...

High-frequency excitation sensorless control methods measure the response of machine to some form high-frequency from which rotor position is estimated. The utilization these meth ods feasible in both induction and PMSMs. design strongly influences its salient behavior, meaning that not all designs are adequate for their use applications. All respond same physical principles, with main differences among them being type high frequency signal number signals measured. Stable operation, similar...

This paper analyzes saliency-based sensorless control methods for AC machines. The focuses on three different methods, which utilize the following signals: negative-sequence carrier-signal current, zero-sequence voltage, and pulse width-modulation-switching voltage. Applicability of these both rotor position estimation (tracking rotor-position-dependent saliencies) flux flux-dependent is studied each method, as well aspects their implementation.

This paper studies the performance limits of carrier-signal-injection-based sensorless control methods. When a high-frequency carrier-signal voltage is injected into salient ac machine, two types signals are created that can be used to estimate rotor position: 1) negative-sequence current and 2) zero-sequence components. The limitations machine using each these analyzed in this paper. analysis focuses on three key metrics: accuracy; bandwidth; 3) stability estimated position.

Fault detection of line-connected induction machines using complex vector wavelets to analyze the transient stator currents during startup is proposed in this paper. When a machine connected line, characterized by large (and rotor) as well slips (i.e., rotor speed significantly smaller than excitation frequency). The current with damaged rotors includes dependent components transient. Such components, however, fade away or coincide not containing fault-related information (e.g.,...

Current regulators are a critical part of active power filters (APFs). The design current capable compensating high-frequency harmonics created by nonlinear loads is challenging task. Selective harmonic compensation using viable method to achieve this goal. However, their and tuning not an easy performance-and even the stability-of strongly depends on implementation issues, with controller gains being critical. Furthermore, presence multiple working in parallel can create unwanted couplings...

The diagnosis of stator winding faults in inverter-fed AC machines using an injected high-frequency carrier signal is presented and analyzed this paper. Measurement the resulting negative-sequence current (or alternatively impedance) used to detect turn at incipient stage. Though sharing same physical principles similar techniques applied line-connected machines, use a shown present important advantages, such as providing performance almost independently fundamental excitation frequency,...

This paper presents a simple and robust way of utilizing harmonic saliencies created by rotor stator slotting, present in some induction machine designs, for the estimation position. The injection carrier-signal voltage, addition to fundamental excitation, produces current that contains desired spatial information. A closed-loop tracking observer is then used extract this information Due its reliance on saliency carrier-frequency signal injection, technique very over wide speed range,...

Field-weakening techniques have been developed which provide maximum torque capability above rated speed. Unfortunately, most of these are valid only for steady-state operation and show significant sensitivity to DC-bus voltage machine parameters. This paper analyzes the requirements dynamically providing under field-weakening operation. Three major issues addressed: current regulator design; saturation regulators in order ensure best performance constraints; flux design minimize transient...

The focus of this paper is the measuring, modeling, and decoupling saturation-induced saliencies in carrier signal injection based sensorless control. First techniques for measurement are presented. goal these measurements to provide useful information on position magnitude various saliencies. Using results from several different experimental measurements, models developed explaining source behavior concludes by presenting methods effects caused parasitic saliencies, eliminating errors that...

Fault diagnostics for induction machines using an injected high-frequency carrier signal is presented and analyzed in this paper. Both stator winding fault broken rotor bar detection covered. Measurement of the resulting negative-sequence current shown to be capable detecting both types faults at their incipient stage. Though sharing similar physical principles techniques applied line-connected machines, use a provide important advantages inverter-fed such as providing same performance...

The diagnosis of stator winding faults in inverter-fed AC machines using an injected high-frequency carrier-signal voltage is analyzed this paper. Measurement the resulting carrier signals (either negative-sequence current or zero-sequence components) used to detect turn at incipient stage. frequency and magnitude are shown have significant impact on performance method, with criteria for their selection being presented. proposed technique shows low sensitivity working condition machine,...

This paper studies the application of high-frequency voltage excitation-based stator winding diagnostic methods to three-phase ac machines operated from power converters that create necessary excitation as part their normal operation. focuses on two specific operating modes: 1) inverters in overmodulation region and 2) soft-starters during startup. In both cases, (in range hundred hertz) components at well-defined frequencies are created. The negative-sequence currents induced these voltages...

This paper presents a method for estimating the magnet temperature in surface permanent-magnet (PM) synchronous machines during six-step operation. Six-step operation allows maximum available dc-bus voltage to be applied machine, which maximizes its torque and speed range. can of importance electric traction applications, including railway as well hybrid vehicles. However, produces current harmonics that induce additional losses PMs therefore increase their temperature. An result reduced...

This article develops a high-fidelity physics-based modeling approach to predict the voltage stress and current distributions in individual conductors of electric machine windings driven by pulsewidth modulation (PWM) voltages. is first step better understand how PWM voltages winding insulation inverter-driven machines. The finite element (FE) models this account for frequency-dependent parasitic parameters, are capable investigating impact wire positions on hence conductors. A stator core...

Abstract Better thermal management is a key enabler of higher power density in traction inverter modules. For the first time, we successfully fabricated and tested microchannel with three-dimensional (3D) manifold cooler (MMC) using aluminum nitride (AlN)-based directed bonded copper (DBC) substrates. The microchannels (width ∼300 μm height ∼450 μm) 3D fluidic passages ∼600 were two DBC substrates femtosecond laser subsequently transition liquid phase (TLP) bonding. In this study, hydraulic...

Temperature monitoring using the injection of a high-frequency carrier signal voltage is proposed in this paper. The used to estimate transient impedance system, which function stator resistance and, therefore, windingspsila temperature. variation impedancepsilas phase angle track temperature windings. method can be implemented standard inverter-fed drives with no additional hardware, minimal computational requirements, and practically interference regular operation drive.

Inductor current measurements using only a single dc link sensor in an interleaved dc-dc converter is introduced this paper. This technique appealing for the because it minimizes number of sensors, thereby reducing cost, weight, and volume. A combination analytical experimental results provided to confirm that capable achieving attractive performance characteristics areas inductor reconstruction, regulation, output voltage regulation converter.

The increasing penetration of electric vehicles (EVs) brings new flexibility in power grid operation. As EVs serve the main purpose transportation, EV owners will charge their based on driving patterns. Given clustering charging behavior, uncontrolled can burden distribution grid, system operation costs. a distributed energy resource (DER) with highly mobile and nature, aggregated also have capabilities to provide ancillary services alleviate voltage violations and/or regulate frequency....

The focus of this paper is the measuring, modeling, and decoupling saturation-induced saliencies in carrier-signal injection-based sensorless control. First, techniques for measurement are presented. goal these measurements to provide useful information on position magnitude various saliencies. Using results from several different experimental measurements, models developed explaining source behavior concludes by presenting methods effects caused parasitic saliencies, eliminating errors that...