Lumped-parameter-based thermal analysis of a doubly radial forced-air-cooled direct-driven permanent magnet wind generator

Conceptual Framework of Antecedents to Trends on Permanent Magnet Synchronous Generators for Wind Energy Conversion Systems

“…Since the efficiency provided is better, most of the high-power direct-driven wind power applications prefer low-speed and high-torque PMSGs [23]. These are generally applied in a wide range of applications due to cost-effective Permanent Magnets (PM).…”

“…These are generally applied in a wide range of applications due to cost-effective Permanent Magnets (PM). According to the literature [23], Permanent Magnets can provide high-power densities, higher efficiency, and chances of compactness which eventually results in the reduction of turbine size. The advantages of Permanent Magnet generators are when it excludes the exciter field winding, slip rings, and brushes in association with the capability to self-excite making option, so as to achieve good efficiency as well as the high power factor.…”

Design of Water-Cooled Calorimeter for Electric Motor's Power Loss Measurement

“…Herein, it is also worthwhile to inspect the coolant's temperature rise -generic thermal networks assume that the coolant's temperature remains constant, which is not true for regimes with open-circuit cooling. To deal with this, the thermal network of the fluid is incorporated into the network of the solid machine parts and solved together (Jokinen, 1997 andNerg et al, 2013). Alternatively, flow-network analysis (Boglietti et al, 2009b) is also employed.…”

Conceptual Framework of Antecedents to Trends on Permanent Magnet Synchronous Generators for Wind Energy Conversion System

“…A low-speed and high-torque PMSGs are highly preferred in high-power direct-driven wind power applications as they provide better efficiency [99]. PMSG is widely employed owing to the reasonable cost of Permanent Magnet (PM).PM is providing higher efficiency, high-power densities, the possibility compactness which can reduce the turbine size [2].…”

“…And the conventional solution of blowing the cooling air axially through the generator's air gap may not be deemed as an advisable option. To attain optimum cooling, generator's stator is axially segmented to several substacks where the cooling air is blown through radial cooling channels that is formed between two subsequent stator sub-stacks [99]. Janne Nerg, et al, (2012) presented an analytical and thermal model of double radial-cooled low-speed high-torque PMSGs where the thermal model is considered by lumped parameters, which are frequently used during thermal analysis of electrical machines and cooled by forced air flow through the air gap [99].…”