As a new and efficient energy-saving product, permanent magnet synchronous motor has been widely recognized and developed rapidly. With the continuous development of science and technology, contemporary peoples requirements for motor cooling systems are also increasing. Because the temperature rise of the motor is often caused by excessive coil temperature rise, it can also affect key aspects such as the motors usage time, stability, and energy efficiency.

There are many cooling methods for motors, which can be classified according to the different cooling media: air cooling, water cooling, oil cooling, and hydrogen cooling.

Air cooling refers to the method of heat dissipation mainly relying on the air flow inside the motor. Generally, the interior of a motor is a relatively sealed space containing a certain volume of air, which is forced to flow by the rotation of the rotor. Cold air sweeps over the coil and takes away the heat from the motor coil and iron core. Hot air then exchanges heat with the outside world through heat dissipation channels. The air-cooled system has the advantages of simple structure, low cost, convenient maintenance, and stable operation. When the air volume is insufficient, the heat dissipation capacity is relatively low, and ventilation losses cause a decrease in motor efficiency.

Water cooling is one of the methods of liquid cooling, which can be divided into stator water cooling and rotor water cooling according to the different cooling parts. High power winding linear motors often use a water-cooling system, usually by slotting at the bottom of the winding and installing cooling water pipes, which circulate in a loop to take away the heat from the winding and iron core, and exchange heat in the cooler. Water has a higher specific heat capacity and strong cooling capacity.

Oil cooling is another form of liquid cooling. Unlike the cooling medium water, oil has a higher dielectric constant. Therefore, it can be cooled through pipelines like water cooling, or directly in contact with windings and iron cores with higher temperatures for cooling. However, the purity of the oil must be high. Otherwise, once impurities are introduced, the insulation between the winding coils may be damaged when using oil to cool the motor, directly burning the motor.

The hydrogen cooling system was first developed and used in the 25MW steam turbine engine produced by General Motors in the United States. Hydrogen, as a cooling medium, has unique advantages, with ventilation losses of only 1/10 of air cooling under the same pressure and temperature conditions. Generally, several hollow stainless steel pipes are clamped into the coil winding. Hydrogen flows through the steel pipe to take away heat. The advantage of hydrogen cooling lies in its excellent cooling effect and low noise, while the disadvantage is the complex system structure design and inconvenient maintenance. Moreover, hydrogen gas is explosive and prone to accidents.

Jaguars unique permanent magnet water cooling system

Jaguars permanent magnet motor adopts a unique cooling system specially designed for the characteristics of the motors operating temperature. The independent water cooling system ensures that the permanent magnet motor stays at 70-80 ℃, greatly reducing motor current. The liquid cooled system makes maintenance easier, the motor is efficient, and it never loses excitation.

Jaguar screw machines always adhere to the core of enterprise development as a leader in permanent magnet screw machine technology, committed to providing customers with comprehensive air compression solutions, continuously researching and developing innovative technologies, and energy-saving products. Continue to lead Chinas industry in the field of permanent magnet screw technology and make greater contributions to energy conservation and emission reduction.