H700 series high performance direct torque control driver is a high performance frequency conversion speed control technology product developed by our company.  Direct torque control system has simple structure, easy to implement, and reliance on motor parameter is small, high performance drive control can be realized without sensor, perfect substitute the position control of closed-loop vector control or dc motor applications, at the same time also can cooperate with permanent magnet synchronous motor in industrial equipment open loop in the direct drive at low speed, reduction gear, improving energy efficiency and transmission performance.With the continuous improvement of industrial automation, frequency converter is widely used in various industries and energy-saving occasions, there is a large market demand.