Testing electric motors

Inspecting and testing electric motor, controls, cabling and earthing, checking motor direction of rotation... 

The claims that he underestimated the historical achievements of Russian scientists did hurt Frumkin, however, and briefly he turned his attention to the history of electrochemistry in Russia in order to reevaluate Russian contributions. He rated the studies of Moritz Hermann von Jacobi (21 September 1801-10 March 1874) most highly. (The Russian version of his name is Boris Semyonovich Yakobi. ) Jacobi had discovered the maximum power theorem, and his name is also associated with the development of galvanic cells for testing electric motors. In addition, Frumkin noted the priority of Pyotr Romanovich Bagration (24 September 1818-17 January 1876), who had created the first galvanic dry cell in 1843. Finally, Frumkin drew attention to the work of Kazan professor Robert Andreyevich Colley (Kolli) (25 June 1845-2 August 1891) back in 1878. Colley was the first person to use the shift of the electrode potential in a certain period of time as a measure of the interfacial capacitance and found a value of 150 pF cm for platinum. 

RCT are designed to successfully solve a whole number of tasks in nuclear power when testing fuel elements, in aviation and space industry when testing construction materials, nozzles and engine units, turbine blades and parts, in electromechanical industry-cables switching elements, electric motors in defense sphere- charges, equipment in prospecting for research of rock distribution and detection of precious stones in samples. 

The purpose of testing an electrical motor is to ensure its compliance with the norms of design, material inputs and manufacturing accuracy. It determines the mechanical soundness and electrical fitness of the machine for its electrical and mechanical performance. Such tests determine the following ... 

Part I Selection, testing, controls and protection of electric motors... 

Part I Selection, Testing, Controls and Protection of Electric Motors... 

Instruments and controls checked Refractory dried out Piping Strains on Equipment Electric Motors Rotation Drying out No-load tests Steam-Turbine Drivers... 

The following defines and describes the commonly used terms of electric motor rating, performance, and testing [7] ... 

Weekly inspection and testing consists of visual inspection of oil and fuel levels and fire pump components, including the controller. A function test of the fire pump, driver and starting systems should be conducted. The fire pump should run for a minimum of 10 minutes for electric motor drivers and 30 minutes for other drivers. 

T) Spin Test. The purpose of this test is to check the arming characteristics of a fuze for spin-stabilized ammunition. The equipment consists of a vertical spindle that has an adapter to accommodate the test fuze. The spindle is rotated at the desired rpm by an electric motor or air. In some procedures a stroboscope is used to observe the arming characteristics of the mechanism (p IIB-26 of Ref 39)... 

The same may be said about testing the brittleness of ball powder at Frankford Arsenal, Phila (Ref 10). Brittleness of some proplnts was detd at PicArsn by the compression method(Ref 9) but these results are classified Refs l)S.M.Martin,Jr,Rubber Age(NY) 52,227 (1942) (A bent-loop test, incorporated later by ASTM as D736-43T) 2)M.L.Selker et al.IEC 34,157-60(1942)(A simple app in which a specimen, in the form of a scrip attached to a movable shaft, sharply strikes a stationary steel arm) 3)A.R.Kemp et al,IEC 35/188(1943) (Modification of the previous app by fitting it with an electric,motor and a set of gears in an attempt to control the rate at which the sample strikes the arm) 4)R.E.Morris et al.IEC 35,... 

Mechanical stirring is recommended for testing polymerization reactions or viscous reaction mixtures. This requires the use of taller containment vessels than the original to install the electric motor for the agitator. 

Experiments for testing the flameproofness of specially protected electrical motors and apparatus and for the determination of suitable safety devices for such apparatus, performed at the Berggewerkschaftliche Versuchsstrecke, Gelsenkirchen-Bismarck... 

Dense-phase flow properties can be predicted by measuring the viscosity and deaeration rate of a fluidized bed in a laboratory test (117). This method appears to be especially useful for evaluating the flow characteristics in standpipes. The viscosity is measured by means of a Brookfield viscometer, which consists of a cylindrical wire-screen spindle rotated about its axis by an electric motor through a torsion spring. The torque required to rotate the spindle is measured by displacement of the... 

The cold crank simulator test, ASTM D2602/IP 383, measures the apparent viscosity of an oil sample at low temperatures and high shear rates, related to the cold starting characteristics of engine oils, which should be as low as possible. The oil sample fills the space between the rotor and the stator of an electric motor, and when the equipment has been cooled to the test temperature, the motor is started. The increased viscosity of the oil will reduce the speed of rotation of the motor and indicates the apparent viscosity of the oil. The test is comparative for different oil samples rather than an accurate prediction of the absolute performance of an oil in a specific engine. 

A series hybrid drive train was used where a diesel gas turbine drives a generator to charge a battery pack which powers an electric motor. The system is complex, but the car achieves good performance with low emissions and a 400-mile range. Volvo was testing 50-kilowatt stacks from Ballard before the Ford purchase. 

A compacting load is applied to the lid and left in position until the glue has hardened. The lid is then slowly lifted via a tensile load cell, by an electric motor. The stress required to break the specimen is noted and both the lid and base of the cell are examined after failure to make sure that both are covered with powder, showing that failure occurred within the powder specimen and not at the surface. If both surfaces are not covered with powder, the test is rejected. 

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