Dc motor controller in use, there are many details need to be aware of. Below small make up take you understand understand. 1. If the product has no special instructions, general dc motor controller are not allowed to reverse connection system running under the rated voltage, because it can lead to permanent magnet demagnetization. 2. Due to the large current, temperature and magnetic circuit open circuit when disassembling can make permanent magnet demagnetization, therefore when disassembling of the magnetic circuit of permanent magnet magnetic short circuit protection. 3. In replacement of brush, electric carbon dust around to clean up, and use of alcohol, gasoline to clean the commutator. Another change with a new brush, no-load running in first. Above is an introduction to the details of dc motor controller, hope to help you.