When selecting drive transistors for brushless DC motors, factors such as conduction losses, switching losses, power supply voltage, and current capacity of the drive circuit must be taken into account. The following are specific selection criteria:

1. Conduction losses: The conduction losses of the selected drive transistor directly influence the efficiency and temperature of the drive circuit. Generally, MOSFETs are widely used in practical applications due to their low on-resistance and turn-on voltage. Although IGBTs do not have the same advantages as MOSFETs in terms of turn-on voltage, they have a high hard-switching capability, and are therefore widely used in motor applications with loads.

2. Switching losses: Switching losses are also an important indicator in the process of driving brushless DC motors. MOSFETs have faster switching speeds and lower switching losses than IGBTs, making them ideal choices for applications where frequent switching is required.

3. Circuit voltage: The voltage range that the selected drive transistor can withstand and the power supply voltage of the circuit need to be considered. For example, small brushless DC motors can be driven by low-level signals, while high-power brushless DC motors require high-voltage drives. When choosing a MOSFET, the rated voltage, leakage current, and on-resistance are usually considered.

4. Circuit current: The characteristics of brushless DC motors determine that they will have peak current during operation, so the rated current of the drive transistor also needs to be considered. From this perspective, IGBTs have better performance in high current situations.

In summary, when selecting drive transistors for brushless DC motors, suitable devices should be selected according to specific applications while considering both performance and cost. High-power brushless DC motors typically use IGBTs as drive transistors, while low-power brushless DC motors typically use MOSFETs.

Shenzhen Singsun Electronic Technology Co., Ltd. provides various solutions for high-speed hair dryer, and selects and matches various MOSFETs and IGBTs to provide customers with the most suitable solutions. They provide control board_PCBA_overall solutions that have passed certification, are in mass production, and can be flexibly customized according to customer needs. They can also choose material supply or main supply, and assist customers in completing PCBA design, debugging, certification, and production.

They can also link ID/MD design, molds, accessories, wire resources, and other supply chain resources to help customers quickly achieve product mass production.