Electric motors power

The 211 control rods were moved in and out of the core by winches driven by electric motors. Power and neutron flux distribution were measured by in-core self-powered ion chambers, which were inaccurate at lower power. At low power, ion chambers in the graphite reflector were used. 

Unlike conventional fireworks, the platform and wheel are formed from sections of aluminium tubing (and are hence re-usable) while rotation of the wheel itself is effected by virtue of an electric motor powered by portable batteries, to give about 20 revolutions of the wheel per minute. 

The pollution-free production of electricity within electrochemical generators is a major step forward in technology. In the twenty-first century, transportation—cars, trains, and ships—will all be driven by electric motors powered by electricity derived from fuel cells (Chapter 13). 

Pcp compressor power for a polytropic compression Pe electric motor power Pp fan power Pp pump power Pj turbine power R gas constant s entropy T absolute temperature... 

Power economies can be made in densification as in other processes by proper attention to material size and composition, moisture application, blending, material orientation and feeding, and sizing electric motors. Power requirements for the entire production system are usually two to three times that of densification alone. 

NASA-Langley requested assistance from Sandia to determine the feasibility of free-piston electrical generators in providing propulsive power for aircraft. The concept is to distribute generators throughout the aircraft and utilize electric motor powered fans to propel the aircraft. 

Honda rapidly continues to introduce improved versions of the FCX, with increased power and range (Figure 5.7). With hydrogen compressed to 5000 psi, the FCX can travel as far as 250 miles using its 80 kW electric motor powered by a Honda-manufactured PEM fuel cell stack (Honda Worldwide 2005b). The Honda FC Stack, released in... 

In the laboratories of the agricultural equipment manufacturers Allis-Chalmers, a new version of fuel cell with immobilized alkaline electrolyte solution was developed. The company reequipped one of its tractors to electric traction with an electric motor powered by four batteries consisting of 252 alkaline fuel cells each. The traction was strong enough for a load of 3000 pounds. This tractor was a successful demonstration exhibited on different agricultural fairs in the United States. 

With DC electric motors, power factor correction is sometimes used to improve the power factor of the drive [30]. This is done by incorporating capacitive components into the circuit. Capacitors produce leading reactive power whereas the phase-controlled rectifiers produce lagging reactive power. Thus, by adding appropriately sized capacitors, the power factor of the drive can be improved. 

Long-term factors which will increase the electronic content of cars include the arrival of fuel-cell powered cars and the further development of hybrid vehicles where the petrol engine is used to generate electricity using an alternator and the wheels are driven by electric motors, power being stored in... 

Electrical failure. The electric motor powers the fans used to provide airflow and to power the driveshaft that spins the brush roll. If electrical problems occur in the motor itself, you ll need a new motor or electrical trouble-shooting and repair performed by a qualified technician. 

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