Speaking of high-end home appliances and small home appliance industries, product intelligence has become a battleground for the competition of major manufacturers. As long as the motor is the core component of the product, the control ability and control accuracy of the motor have become the main manifestation of product strength. It is not difficult to see that brushless motors are also frequently promoted by merchants as a product selling point. From the perspective of practitioners, Lao Zhang has reservations about the public perception of brushless motors. But from the other side, brushless motors must be a mainstream solution for manufacturers at present.
Compared with brushed DC motors and brushless motors, the main problem is that the cost is too expensive. The high cost mainly comes from the following aspects:
l On the one hand, it comes from the mechanism of the motor itself;
l On the other hand, it comes from the brushless motor and needs to cooperate with the driver to operate normally;
l At the same time, in order to achieve sufficiently accurate control, signal feedback is often a cost that needs to be invested;
Back to hair dryer products, brushless motors did not enter everyone's field of vision in the early years, for two reasons. One is that it is too expensive, and the cost of consumer-grade hair dryers is simply unaffordable; the other is that there is no demand for the advantages of brushless motors, resulting in serious excess performance. This is why, in recent years, brushless motors have only been used in high-end hair dryers.
Lao Zhang was very fortunate to have participated in the process of competing with Japanese manufacturers to develop this product at the same time. Currently on the market, the solution for brushless motors for hair dryers is this OT-EM3922C18180Y1RA. Lao Zhang introduces the characteristics of this motor to you:
l Outer diameter 38.5mm, length 21.8mm;
l Rated voltage 230V AC;
l The motor only runs counterclockwise (CCW);
l The load speed is 18000RPM (with fan blades), and the maximum power is 120W;
l The low load speed is 16000RPM (with fan blades), and the maximum power is 85W;
l Built-in drive, high and low speed 2 gears
Why was it designed in the first place.
【Outer rotor brushless motor】
Professional-grade hair dryers on the market, DC brush motors are converted to brushless motors, and there is still a transition scheme. That is, there is only an inner rotor brushless motor with the same size as the brush motor. However, due to structural limitations, increasing the speed and torque will inevitably increase the size of the motor. Therefore, there is a flat design of the outer rotor of this motor. On the one hand, the outer diameter of the motor is not too large, and the thickness also saves space for the drive and fan blades, effectively reducing the size of the customer's product.
【One-way rotation design】
Considering the unique product usage scenarios of hair dryers, we have made more efforts to control the noise in the counterclockwise direction when designing the motor. In this way, the customer's hair dryer products have more advantages.
[Built-in driver]
For this motor, Lao Zhang had planned the drive in the product at the beginning of the design. First of all, the built-in driver saves the dilemma that many manufacturers cannot use it after purchasing. At the same time, Lao Zhang considered that the fan blades are generally designed by various manufacturers in combination with the hair dryer, so this motor does not have fan blades. In addition, the current mainstream hair dryers are in 3-5 gears, basically for the air volume, the high and low gears become enough.
【Speed and torque】
This brushless motor was initially positioned as a high-end professional hair dryer. Therefore, in terms of torque, it is designed to be relatively large, and professional-grade blades do not have to worry about the situation that the speed is not enough after the load is too large. Lao Zhang, taking a conventional professional hair dryer fan blade for testing, the high speed is 18000RPM under load, the low speed is 16000RPM, and the no-load is 23000RPM.
The current application market of this motor is still the professional high-end hair dryer market. In terms of design, the current drive design can be fully satisfied if the requirements for gears are not very urgent. But from the motor's point of view, after installing the fan blade, it is best to debug the driver to fully release the motor hardware performance.
There is no best motor, only the best motor for you
