Speed sensorless vector control variable frequency speed control has the advantages of high reliability, high cost performance, convenient operation, simple structure, etc., which is suitable for situations where the consumption demand is not high. Speed sensorless vector control is shown in the figure. The vector control variable frequency speed regulation with speed sensor has the advantages of reliable operation even at low speeds, a wide range of speed regulation, accurate control, fast dynamic response speed, and good acceleration characteristics.
From the aspect of energy consumption, the speed regulation of the winding rotor string resistance will generate different levels of power and energy loss during the operation phase of the mining frequency converter hoist (including the acceleration phase, deceleration phase, and ramp-up phase). Speed mode is not cost-effective and low economic performance.
The AC variable frequency speed regulation system usually uses energy feedback technology to reflect the electric energy generated by the motor during the power generation operation to the power grid through the inverter, and store the electric energy, so that the hoist can run in four quadrants. Electric power.
Dispatch Winch has been selected for a long time and is a well-known company specializing in manufacturing Dispatch Winch and mine hoist. The main products are Dispatch Winch, Dispatch Winch, Hydraulic Dispatch Winch, Dispatch Winch, Dispatch Winch accessories, Dispatch Winch, JTK , 2JTK, JTP, 2JTP, JTPB, 2JTPB and other mine Dispatch Winch; JK, 2JK, JKB, 2JKB and other mine hoist.
