What are the details to pay attention to when using brushless DC motors?

1. If the product does not have special requirements, the DC fan motors is not allowed to operate in reverse connection under the rated voltage. Because once the reverse connection operation is performed, the permanent magnet will be demagnetized. If it is necessary to operate in this way, a current limiting resistor must be added to limit the excessive current.

2. Pay attention to avoid demagnetization of permanent magnets due to excessive current, temperature changes and open magnetic circuit during disassembly and assembly, especially for AlNiCo permanent magnet motors, magnetic short-circuit protection is required during disassembly and assembly to avoid demagnetization.

3. When replacing the brushes of the DC brushless motor, it is necessary to clean the surrounding electric carbon dust first, and then use alcohol and gasoline to clean the commutator. At the same time, pay attention to no-load running-in when using new brushes.

4. When the load is too large or the power transistor is burnt due to improper use, a high-power transistor will be used to protect the driver from damage due to the current exceeding the specification.

5. When the load of the flow motor is not small, the energy sent back to the driver by the device end will endanger the driver when it stops rotating, so it is necessary to cooperate with the overvoltage protection circuit and the regenerative energy dissipation circuit to deal with it.