With the rapid development of medical equipment manufacturing industry in China, the DC motor governor developed by the company has been successfully applied to medical imaging Dr equipment. Compared with the traditional DC motor controller, the product has added over-current protection, over-voltage protection, under voltage protection, over temperature protection, short circuit protection and four quadrant reversible Technology, effectively protecting the normal equipment of the customer Operation, especially the successful application of four quadrant reversible technology, effectively solves the interference of electric spark on the circuit when the relay changes direction, and can effectively carry out energy recovery, help customers save energy, and make contribution to the national energy protection!