Motor manufacturing High-conductivity and high-strength […]
High-conductivity and high-strength copper alloys are widely used in motor manufacturing. The main copper parts are the stator, the rotor and the shaft head. In large motors, the windings are cooled by water or hydrogen, called dual water internal cooling or hydrogen cooling motors, which require large lengths of hollow conductors.
The motor is a large consumer of electricity, accounting for about 60% of the total power supply. The cumulative electricity bill for a motor is very high. Generally, the cost of the motor is easy to reach within 500 hours of the initial operation. It is equivalent to 4 to 16 times the cost within one year, and can reach 200 times the cost during the entire working life. A small increase in motor efficiency not only saves energy, but also provides significant economic benefits. The development and application of high-efficiency motors is a hot topic in the world today. Due to the energy consumption inside the motor, it mainly comes from the resistance loss of the winding; therefore, increasing the copper wire cross section is a key measure for the development of high efficiency motors. And some of the high-efficiency motors that were first developed have a 25-100% increase in the use of copper windings compared to conventional motors. The US Department of Energy is funding a development project to produce motor rotors using copper-cast technology.