Engineering efforts to simulate radial-flux machines concentrate on inherently 2D problems. The QuickField analysis, for a 5-hp, two-pole, wound-field dc motor, is used to optimize motor laminations. This minimizes local saturation, provides sufficient space to insert stator and rotor coils, and improves overall manufacturability. The vector potential distribution is for a 3.5-hp, four-pole, NdFeB, brushless ac servomotor. Magnetostatic features in QuickField help analyze demagnetization characteristics, torque constants of dc motors, and steel saturation at no load and full load. To calculate output power at a given rotor current, users solve the inverse problem of calculating torque for a synchronous motor at a preliminary estimated rotor current and load angle (rotor position). The instantaneous vector potential distribution is for a 3-hp, four-pole switchedreluctance motor in a high-speed application. The calculated harmonic spectrum (less fundamental) of the radial force density is applied to the stator bore of a 600-hp, six-pole ac motor for an adjustable-speed application at full load. Most of the 2D FEA software is good for "quick-and-easy" solutions demanded by shorter design schedules. Although 3D software allows examining more complex models, doing so is not feasible when there is only a day or two to analyze electromagnetic
Products & Services
Motor controllers receive supply voltages and provide signals to motor drives that are interfaced to motors. They include a power supply, amplifier, user interface, and position control circuitry.
Linear motors generate force only in the direction of travel. They are capable of extremely high speeds, quick acceleration, and accurate positioning.
Electrical Winding Services
Companies that specialize in the fabrication of custom wound assemblies for a wide range of electrical applications and industries. Electrical winding services also includes the repair and refurbishing of individual wound components.
Motor contactors are relays with large current capacity for connecting and disconnecting a motor from the power supply. Typically, motor contractors are multi-pole for control of all current carrying conductors.
AC Motor Drives
AC motor drives interface controllers to AC motors. They match the control signals (voltage and power levels) as well as the signal type (analog or digital). They also provide power conversion, amplification, and the sequencing of waveform signals.
Topics of Interest
General Principles of Operation-Stepper
A step or stepper motor is one in which electrical pulses are converted into mechanical movements. A standard DC motor, for example, rotates...
Induction motors, the workhorses of industry, rotate at a fixed speed that is determined by the frequency of the supply voltage. Alternating current applied to the stator windings produces a magnetic...
Control of Speed, Torque, and Horsepower
Control of Speed
The speed of a squirrel cage motor depends on the frequency and the number of poles for which the motor is wound. The higher the frequency,...
AC and DC motors are the two major types in use today that are related to the industrial and HVAC applications. These motors provide the speed, torque, and horsepower necessary to operate the...
A new stepmotor design boosts efficiency and reduces noise and vibration. Prime-ratio hybrid stepmotors like these look and work exactly like the conventional hybrid versions. But the design of their...