The DC Motors speed can be controlled by varying the supply voltage and are available in a wide range of voltages, however the most popular types are 12 and 24V, with some of the advantages including easy installation, speed control over a wide range, quick starting, stopping, reversing and acceleration, high starting torque
, linear speed and torque curve.
Similar to these applications, apron and belt feeders operate in harsh environments, where they face both high starting torque
and frequent load spikes.
Despite high starting torque
and wide constant power operation region of PMSMs, the use of a single-speed gearbox requires a motor with high torque to achieve acceptable levels of acceleration and gradeability.
The mill is powered by a 150 hp, two-speed, high starting torque
Leeson has also designed-in electrical robustness, including powerful low temperature manual overload protectors, Class "F" copper windings and varnish, and a capacitor start which provides high starting torque
with normal starting current.
The high gain of this generation allows these devices to be able to sustain significant over-currents, which is particularly useful when starting up some types of compressors which require high starting torque
[13.] Afjei, E., et al., "A novel two phase configuration for Switched reluctance motor with high starting torque
," International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM), 1049-1052, 2008.
A physical factor that limits the penetration depth of the highwall miner is the high starting torque
required to rotate the augers that convey the mined coal.
An almost solid disc as in the old wind pumps provides high starting torque
but poor efficiency.
* High starting torque
, auto-tuning, advanced low-speed control and dynamic speed regulation.
Exhibiting four modes of operation (V/Hz, Enhanced V/Hz, Vector Speed, and Torque), high starting torque
, auto-tuning, advanced low-speed control, and dynamic speed regulation, the drive features 1 to 25 hp, supply power of single phase: 120, 208, 220 or 240VAC and three phase: 208,240, 400, 480 or 600VAC50/60 Hz, Standard output frequency of 500 Hz with 1000 Hz optional.