Starting Current

Starting Current

 

the current drawn from the mains by an electric motor upon starting. Since the starting current of an electric motor can be several times greater than the motor’s rated current, it becomes necessary to limit the current by means of a starting resistance. It is sometimes also necessary to limit the starting current in order to reduce the starting torque to a value dictated by the mechanical strength of the shafts and other parts of the driven mechanism or to achieve the smooth start required by certain production processes. The goal is usually to obtain the required torque with the minimum starting current.

REFERENCE

Kostenko, M. P., and L. M. Piotrovskii. Elektricheskie mashiny, parts 1–2. Leningrad, 1972–73.
References in periodicals archive ?
In the energy category, which includes currents in the stator windings, efficiency and the starting current ratio, the highest convergence has the efficiency (deviation 1.
Initially starting current nearly 250A and finally settled at 75A.
The studied machine is an ordinary industrial four-pole (2p = 4) induction machine utilizing aluminium single-cage with deep rotor bars to meet the high rotor locked torque with low starting current and low rated slip.
The large starting current of motor-A is provided by a 7812 dc voltage regulator with a current booster BJT transistor MJ2955.
NEMA Design A: High torques, low slip, high locked amperesused for pumps and fans if starting current inrush is not an issue.
Proprietary in-rush measurement technology to filter out noise and capture motor starting current exactly as the circuit protection sees it
Concerning cortical stimulation in the anesthetized patient, the starting current is usually 4 mA and is increased at 2 mA intervals until an EMG or a motor response is visually identified in the left arm (4,5).
Using the drive to soft start the motor controls the starting current and reduces the inrush current.
It has a 200A starting current, 400A peak current, 2.
So, the challenge is to reduce losses with a minimum cost increase and general motor performance improvement, not only in terms of efficiency, but also noise, vibration, temperature rise, starting current and torque, and power factor.
It will take a long time to see if people starting current antiretroviral combinations at a high CD4 count will live as long as people without HIV, and to figure out which HIV-positive people have the best chance of living longer.
Other major features include an open work deck area fitted with handrails, kick plates and multiple access ladders; an automated cable reel, making this mining process safer and quicker; a PLC-based control system: and a soft start option intended to effectively reduce the starting current, lowering impact on the local power grid and other equipment in operation.