POWERTEC Brushless DC Motors

POWERTEC's selection of enclosures - TENV, TEAO, DPFG and DPBV - provides suitable motor enclosures and mounting for virtually any industrial environment. The motors are available with NEMA foot mountings; NEMA C-face, and D-flange mountings are also available.These brushless DC motors use efficient ceramic ferrite permanent magnets bonded to the rotor to produce the magnetic field. Thus, there are no losses in the motor due to rotor induction currents. All of the current delivered to the brushless DC motor is used to develop torque.The powerful and lightweight permanent magnet rotor design provides low rotor inertia for high torque to inertia ratios in a relatively small frame. This high torque density equates to a very responsive motor with high starting and running torque, rapid start-stop capabilities and smooth operation over the entire speed range.The brushless DC motor is a true synchronous motor. The rotor field is always in sync with the excitation field; it does not have losses due to slip. This factor, inherent to brushless DC design, combined with various primary and secondary feedback options, allows for precise speed and torque control.Reliable, low-maintenance brushless DC motors do not have any brushes to replace or a commutator to wear out. Little heat is generated in the rotor allowing the bearings to run cooler while increasing bearing life. Factory mounted feedback devices are integral to the motor and eliminate high maintenance couplings.

Brushless Motor Drivers

8.0kW Heavy-Duty Brushless Motor Driver Inverter Boards.
Great for driving brushless motors, induction motors, switched reluctance motors, and related applications.
Use for electric vehicles, robotics, industrial, alternative energy, experimental electric aircraft, and automotive applications.




For brushless motors, induction motors, switched-reluctance motors, and related motor drive applications. Can also drive brushed motors (just use 2 of the 3 phases).
6-IGBT, 3-Phase, 15kHz Inverter.
Connect to the 6 PWM logic-level signals of a motor controller, DSP or microcontroller, either 3.3 Volt or 5.0 Volt.
Input voltage range: 48VDC - 180VDC. (Can run off 110VAC-120VAC full-wave rectified DC.) No other voltages required. Board generates its own circuit voltages (see description below).
Output drive current: 50A per phase maximum.
6-IGBT 3-Phase 15KHz Inverter.ASTM D120 Test Voltage of 20,000 Volts.
Comes mounted on Heavy-Duty Black-Anodized Aluminum Heat Sink.
Built-In Current Limit.
Built-In 17 Watt Power Supply that powers the driver electronics, plus it has several outputs that can power your external circuits: +5.0VDC (2 Watts), +15VDC (5 Watts), -15VDC (5 Watts), and an extra isolated +15VDC output (5 Watts).
Power Rating Table:8.0kW with 170VDC input voltage at IGBT temperature 25C.4.6kW with 170VDC input voltage at IGBT temperature 100C.2.3kW with 48VDC input voltage at IGBT temperature 25C.1.3kW with 48VDC input voltage at IGBT temperature 100C.
11.75 x 5.25 x 1.75 inches29.8 x 13.3 x 4.45 cm.
Full step-by-step instructions included.
Free email technical support.
All boards are individually-tested before shipment.

Servomechanism

A servomechanism, or servo is an automatic device that uses error-sensing feedback to correct the performance of a mechanism. The term correctly applies only to systems where the feedback or error-correction signals help control mechanical position or other parameters. For example, an automotive power window control is not a servomechanism, as there is no automatic feedback that controls position—the operator does this by observation. By contrast the car's cruise control uses closed loop feedback, which classifies it as a servomechanism.
A servomechanism may or may not use a servomotor. For example, a household furnace controlled by a thermostat is a servomechanism, yet there is no motor being controlled directly by the servomechanism.
A common type of servo provides position control. Servos are commonly electrical or partially electronic in nature, using an electric motor as the primary means of creating mechanical force. Other types of servos use hydraulics, pneumatics, or magnetic principles. Usually, servos operate on the principle of negative feedback, where the control input is compared to the actual position of the mechanical system as measured by some sort oftransducer at the output. Any difference between the actual and wanted values (an "error signal") is amplified and used to drive the system in the direction necessary to reduce or eliminate the error. This procedure is one widely used application of control theory.
Servomechanisms were first used in military fire-control and marine navigation equipment. Today servomechanisms are used in automatic machine tools, satellite-tracking antennas, remote control airplanes, automatic navigation systems on boats and planes, and antiaircraft-gun control systems. Other examples are fly-by-wire systems in aircraft which use servos to actuate the aircraft's control surfaces, and radio-controlled models which use RC servos for the same purpose. Many autofocus cameras also use a servomechanism to accurately move the lens, and thus adjust the focus. A modern hard disk drive has a magnetic servo system with sub-micrometre positioning accuracy.
Typical servos give a rotary (angular) output. Linear types are common as well, using a screw thread or a linear motor to give linear motion.
Another device commonly referred to as a servo is used in automobiles to amplify the steering or braking force applied by the driver. However, these devices are not true servos, but rather mechanical amplifiers. (See also Power steering or Vacuum servo.)
In industrial machines, servos are used to perform complex motion.