Portescap unveils coreless DC motors with REE technology
September 26, 2011 by Motion Control Tips Editor
Filed under Uncategorized
Portescap (www.portescap.com) has announced that its coreless DC motors range meets the demanding requirements of intrinsic safety application with proprietary Reduced Electro Erosion (REE) technology.
“DC motor commutation is accomplished via brushes, which leads to electrical arcing during rotation. To reduce electro erosion while extending commutator life, Portescap innovated the proprietary REE coil system to reduce the effective inductivity of brush commutation by optimizing the mutual induction of the coil segments,” said Dave Beckstoffer, Project Manager for Strategic Markets.
“Portescap conducted tests on motors with and without REE coil optimization and found that commutator surface wear with REE coils showed improvements ranging from 100 to 300 percent.”
Aside from the benefits of REE technology, the company’s brush DC coreless motors also offers salient features such as no cogging, low moment of inertia, high efficiency, compact commutation and low friction resulting in high acceleration, higher continuous torque and very low joule losses. The motors deliver maximum continuous torque ranging between 0.66 mNm and 158.6 mNm, a low motor regulation factor (R/K2) of .3 103/Nms, and no load speed that range from 11,000 RPM (eight mm) to 5,500 RPM (35 mm).
Its intrinsically safe motor operation is especially important in ambulatory applications subject to extra-ordinary operating conditions and/or harsh environments. Typical applications include environmental analyzers, fuel cells and gas analyzers.
This highly efficient, lightweight coreless DC motors also serves as an ideal solution for miniature pump manufacturers faced with issues of intrinsic safety in portable applications.
Bison Gear’s TightDrive™ Motor-Mounted Speed Control
February 27, 2009 by Motion Control Tips Editor
Filed under Motors
St. Charles, IL — Bison Gear’s new TightDrive™ speed control for permanent magnet DC (PMDC) motors was designed for applications that require a convenient location for the control … on the motor. The majority of PMDC gearmotors and motors used in industry today require speed controls in order to operate. Typically, the control is wired to the motor through a costly, complicated cable system and the motor and control can be many steps away from each other. Bison’s voice of the customer research brought forth the need for a convenient “point of use” motor speed control that was robust for industrial environments, while offering practical features and exceptional value.
Bison Gear & Engineering’s new TightDrive™ motor-mounted speed control can be easily field mounted on Bison PMDC gearmotors up to 1/6 horsepower (124 watts) and offers a 20:1 speed range with maximum output of 90 Volts. The TightDrive™ is housed in a durable aluminum extrusion which offers NEMA 1 (IP 30) protection and superior heat dissipation. Speed is controlled with a combination on/off switch and speed potentiometer. In addition, three easily accessible adjustable potentiometers provide settings for minimum RPM, maximum RPM, and current limiting. The simple, yet innovative, SCR control architecture also provides much tighter speed regulation than alternative controls.
The TightDrive™ is designed for 115 volt 50/60 Hz operation and comes complete with three foot power cord and NEMA 5-15P plug. Users can mount the drive directly to the motor in 90° increments to optimize position of cord exit and motor leads. The new TightDrive™ speed controls are available for immediate shipment from Bison’s distribution network or direct from the Bison Gear web site.
www.BisonGear.com
MicroMo – DC Motors Specialists
February 20, 2009 by Motion Control Tips Editor
Filed under Motors
DC Motors Specialists – MicroMo Electronics specializes in the design and assembly of the world’s smallest high precision, miniatures and micro electromechanical drive systems. Components and controls up to 200 Watts in mechanical output power.
With the largest consolidated portfolio of miniature and micro motor drive system technologies, MicroMo specializes in the design and manufacture of complex, high precision miniature and micro drive motor systems for challenging areas of application such as Medical Devices, Handling Automation, Industrial machinery and Precision Optics.
MicroMo provides engineers with the information they need to specify or purchase electric motors including DC Motors, Coreless DC Motors, Flat Coreless DC Motors, and High Power PMDC Motors.
