Why is the hollow cup brushless motor so expensive?
Why are hollow cup brushless motors more expensive than brushed motors, inner rotor brushless motors, and outer rotor brushless motors? This is mainly due to the triple premium effect of material cost, performance advantages, and application scenarios.
In terms of material, the hollow cup rotor is made of micron level self-supporting copper wire winding (ironless copper wire winding), with a copper material purity requirement of>99.9%, an increase of 40% in usage compared to traditional windings, and the use of high-performance neodymium iron boron magnets, which account for more than 30% of the total cost of the machine; And brushed motors only require ordinary magnetic steel, with low cost; Due to the extremely high rotational speed of the hollow cup, high-performance components such as ceramic bearings are required, and the cost is 3-5 times higher than that of ordinary bearings.
High performance of hollow cup brushless motor:
Compared to brushed motors: lifespan extended by 5 times (5000 hours ↑), energy conversion efficiency>90% (brushed only 60%)
VS brushless inner and outer rotors: power density is twice as high (same volume torque+30%), response time<10ms (outer rotor>30ms)
Domestic scarcity: 70% of global production capacity is monopolized by overseas companies (such as Faulhaber in Germany), with a localization rate of less than 10%, and scarcity drives up prices.
High end customized premium for hollow cup brushless motors:
It is commonly used in high-end products such as medical equipment, robots, high-speed trains, automobiles, and smart homes, and its price is much higher than that of conventional motors.
When you need a motor in your research and development, while the hollow cup brushless motor can meet your needs, it is often necessary to understand the cost of the hollow cup brushless motor. Customers who are not familiar with this type of hollow cup motor may feel that this motor is more expensive than the finished product you have developed.
