Dc motor controller at the time of use, need to master the correct method to play its role. To introduce below small make up on dc motor controller in use need to pay attention to details. 1. If the product has no special invited, generally rated voltage of the dc motor controller cannot reverse system operation, to avoid permanent magnet demagnetization. 2. Use, pay attention to the excessive current, temperature change, and the problem of magnetic circuit open circuit when disassembling avoid permanent magnet demagnetization; 3. When change the brush to the surrounding electric carbon dust cleaning, clean with alcohol, gasoline and commutator, and the switch to a new brush, no-load running in first. Above is the use of dc motor controller is attention to detail is introduced.