With the increasing promotion of national energy conservation and emission reduction policies

hydropower

turbine power generation and wind power generation have developed rapidly

and various generators and motors are developing in the direction of high voltage and miniaturization. It is the key to reduce the volume of the motor at the same power

reduce the insulation size (including inter-turn insulation and main insulation) and increase the slot full rate. The reduction of insulation size is a contradiction with insulation quality and insulation reliability. Only a scientific and reasonable insulation structure can make the motor not only have excellent performance

but also meet the needs of larger power and smaller volume. The insulation thinning of high voltage motor can improve the heat dissipation capacity of main insulation

reduce the temperature rise of motor

and reduce the aging of insulation near copper wire caused by temperature rise. In addition

reducing the insulation thickness can increase the utilization rate of the slot

reduce the size of the motor under the same temperature rise

and reduce the copper consumption and mechanical energy consumption. High voltage motor insulation thinning is an important way to improve motor efficiency and reduce manufacturing costs

but to achieve insulation thinning

it is necessary to develop new high-performance insulation materials and optimize integrated insulation system

without reducing electrical insulation

aging and other properties of the premise of insulation thinning. Electromagnetic wire

mica tape with less glue

environmental protection epoxy vacuum pressure impregnation (VPI) resin and high resistance anti-halo material are studied

and integrated insulation system is optimized for systematic performance evaluation. The results show that the optimized 10 kV insulation system has the insulation thickness between turns 0.40 mm

the main insulation thickness 1.8 mm

the corona voltage ≥1.7 UN

and the electric aging life ≥350 h. At the same time

it has excellent electrical insulation performance and meets the technical requirements of high voltage motor.