However, the flux estimation is usually based on the integration of the motor phase voltages.
We can chat with our pals about compression ratios and horsepower and valve timing. We know the advantages of displacement and the efficiency of turbos. Car meets quickly turn into oceans of popped hoods. Even the most cutting-edge engine tech in the latest hypercar is parsed out thoroughly in the automotive media.
You know, the ones that have been around for almost years and were powering cars in the s, until gasoline engines overtook them due to their range and speedy refueling. One of the first alternating-current induction motor inventors: Our collective and virtually absolute lack of knowledge of what actually drives the wheels of all the new electric vehicles on the roads today is, indeed, puzzling.
How bad is this problem? Technical information is scarce, and mostly found only in forums and niche technology sites. Among reviewers, Roy is far from the only one to give the motor short shrift.
Most EV reviews gloss over that key part of the tech, except to note its relative quiet, its torquey response, and its simplicity and long-term low maintenance requirements. Most of the space dedicated to the powertrain focuses instead on the battery—how big, its construction and composition, where it sits, how much range it has, how many days it takes to fully charge, and so forth.
Consider, for one thing, that most carmakers have brought motor manufacturing in-house. Lighter materials in motor construction, new alternative solutions for rare-earth magnets, and optimized overall performance characteristics for different vehicle demands are all very much in the crosshairs of automotive engineers.
One of the key choices is the general type of the motor. Tesla, for instance, while typically very tight-lipped about its innovation, made a significant change with its Model 3 in its decision to use a permanent-magnet electric motor instead of the AC induction motor it has used so far.
The Chevy Bolt uses a similar strategy for the same reason. This configuration allows for precision torque vectoring in an all-wheel-drive setup, with a conventional or hybrid engine supplying power to the other axle.
Honda The placement of the front-mounted motors in the Acura NSX Additionally, Honda made the motors in the new Accord Hybrid smaller by using square copper wires instead of round ones in its stator—the stationary part of an electric motor, which generates the alternating magnetic field to spin the rotor—since square wires nest more compactly and densely.
Engineers also used three smaller magnets in place of two larger ones for the motor, which helps improve torque, the company said. Honda is also well-known for its integrated electric motosr, which sit between the engine and transmission in hybrid models.
They are not off-the-shelf components. Some innovators will seek out magnets made using more low-cost and non-rare-earth elements, as Honda recently did in a development project with Daido Steel.
Their neodymium magnet contains no heavy rare earth materials, but is still powerful enough for vehicle use. Motor speeds will also improve; right now they range from roughly 12,—18, rpm, but researchers are developing motors that can reach 30, rpm—with the benefit that a smaller, lighter motor can do the work of a larger one that spins more slowly.
There will also be improved thermal management that will further enhance efficiency, and completely new motor designs, such as ultra-lightweight in-wheel hub motors—which have been attempted in the past but are usually stymied by heavy hardware.A linear induction motor (LIM) is an alternating current (AC), asynchronous linear motor that works by the same general principles as other induction motors but is typically designed to directly produce motion in a straight line.
Characteristically, linear induction motors have a finite primary or secondary length, which generates end-effects, whereas a conventional induction motor is arranged.
An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding.
An induction motor can therefore be made without electrical connections to the rotor. An induction motor's rotor can be either wound type or squirrel-cage type. motor drive is often used in a high performance applications.
Vector Control or Direct Torque Control are the most commonly used control techniques in these applications. Welcome to the Motor Control and Drive design center. Here you can find solutions for your motor control project whether you are using brushed DC, stepper, brushless DC, permanent magnet synchronous, AC induction, or switched reluctance motors.
You can shorten your development cycle by using free motor control software with application notes and tuning guides.
BOUSSAK AND JARRAY: A HIGH-PERFORMANCE SENSORLESS ISFOC OF INDUCTION MOTOR DRIVE 43 Fig. 1. Block diagram of the conventional PI controller with feedforward decoupling method. ABB offers a full range of high voltage induction motors, including rib cooled motors, modular slip-ring motors and modular welded frame motors with different cooling options.