Brake motors boast premium efficiency
A
Baldor product story
Edited by the Engineeringtalk editorial team
Mar 11, 2005
Baldor has launched two new families of three-phase brake motors based on its renowned Super-E premium efficiency motor technology.
Baldor has launched two new families of three-phase brake motors based on its renowned Super-E premium efficiency motor technology.
Intended primarily for applications involving lengthy duty cycles or continuous operation, where the need for energy conservation is most acute, the new Super-E brake motors feature an electromechanical spring-set brake which provides fast stop and positive hold capabilities.
Available in standard and washdown versions, the motors are particularly cost-effective in applications involving 24/7 operation, such as conveyors and baggage handling systems.
Standard Super-E brake motors, known as EBM models, offer a choice of 12 models spanning power outputs from 0.75 to 22kW to maximise application flexibility.
The complementary CEWDBM family of washdown motors comprises eight models, with power ratings from 0.37 to 3.7kW, which are built to the same exacting standards as Baldor's range of white epoxy-coated washdown duty motors.
All Baldor Super-E brake motors meet or exceed NEMA Premium and exceed equivalent IEC Eff 1 energy efficiency ratings.
The 22kW EBM model, for example, has a very high full load efficiency of 94.1%, and still provides a figure of 93.8% at half load.
The motors employ a number of special design features to achieve this level of performance, including high copper mass windings, premium-grade steel laminations, precision rotor-to-stator air gaps, and high efficiency fans.
As standard, the motors are designed for operation from 230/460V AC, 60Hz supplies and feature NEMA frame sizes, to suit OEMs and machine builders serving the US and similar markets.
Metric versions with IEC standard frame sizes, designed for use with 50Hz supplies, are also available for European and allied markets.
Both the EBM and CEWDBM families of Super-E brake motors are "inverter ready", in that they meet the corona inception voltage requirements of NEMA Standard MG 1, Part 31.4.4.2, and can withstand peak voltages up to 1.6kV.
The motor windings use ISR (inverter spike resistant) magnet wire, extra winding insulation and tightly bound end turns, which makes them up to 100 times more resistant to the type of transient voltage spikes and fast rise time pulses frequently produced by inverters, thus maximising reliability.
The motors can also be used with adjustable speed drives, producing a constant torque output over a 20:1 speed range.
Baldor's Super-E brake motors are TEFC (totally enclosed fan-cooled) designs, and the CEWDBM washdown models are also TENV (totally enclosed nonventilated).
The largest 11.2 to 22kW models in the EBM family have cast iron motor housings and fan covers, whereas all other models feature a thermally efficient steel band construction.
The long-life spring-set brakes are mounted at the opposite end of the motor to the drive shaft, significantly simplifying installation; the motors have a NEMA standard BA dimension, and can easily be converted to C- or B14-face mounting, using pretapped holes in the motor face.
The brake unit coils in all Super-E brake motors with power ratings up to 7.5kW are internally connected to leads in the conduit box, enabling the brake to operate normally when power is applied to the motor.
If separate brake coil connection is required for use with adjustable speed drives, the connections can easily be altered in the conduit box without disassembling the motor housing.
The 11.2 to 22kW EBM motors are equipped with separate connections for the brake.
All brake units on Super-E brake motors are fitted with 230/460V coils as standard, and feature a manual release mechanism to allow movement without the application of power.
Baldor's range of brake motors is already the most extensive in the industry.
The introduction of the Super-E EBM and CEWDBM families means that users can now fit highly energy efficient versions, offering considerable savings in lifetime operating costs and reduced environmental impact.
NEMA frame sise, base mounting versions of all models are available ex-stock, with C-face mounting, metric IEC frame size and B14 face mounting versions available with very short delivery times.
All Baldor Super-E brake motors carry a comprehensive 3-year warranty.
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Contact Baldor
Tel +44 1454 850000
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