采煤機(jī)外文翻譯---電牽引采煤機(jī)的開關(guān)磁阻電動(dòng)機(jī)-文庫吧資料
2024-12-13 17:06本頁面
【正文】 f the hydrostatic transmission system could affect the production and the benefit of the coal mines directly. The fault ratio of the motor drive system is lower than that of the hydrostatic transmission system, but it is difficult to cool the motor drive system in coal mines since the motor drive system should be installed within the flameproof enclosure for safety protection. The motor drive system is also one of the pivotal parts in the automatization equipments. The development of the novel types of the motor drive system had been attached importance to by the coal mines. The Switched Reluctance motor drive could bee the main equipments for adjustable speed electrical drive system in coal mines [1], because it has the high operational reliability and the fault tolerant ability [2]. The Switched Reluctance motor drive made up of the doublesalient pole Switched Reluctance motor, the unipolar power converter and the controller is firm in the motor and in the power converter. There is no brush structure in the motor and no fault of ambipolar power converter in the power converter [3][4]. The Switched Reluctance motor drive could be operated at the condition of lacked phases fault depended on the independence of each phase in the motor and the power converter [5]. There is no winding in the rotor so that there is no copper loss in the loss and there is only little iron loss in the rotor. It is easy to cool the motor since it is not necessary to cool the rotor. The shearer driven by the Switched Reluctance motor drive had been developed. The paper presented the developed prototype. II. SYSTEM COMPONENTS The developed Switched Reluctance motors drive for the electrical traction in shearer is a type of the double Switched Reluctance motors parallel drive system. The system is made up of two Switched Reluctance motors, a control box installed the power converter and the controller. The adopted two Switched Reluctance motors are all threephase 12/8 structure Switched Reluctance motor, which were shown in Figure 1. The two Switched Reluctance motors were packing by the explosionproof enclosure, respectively. The rated output power of one motor is 40 KW at the rotor speed 1155 r/min, and the adjustable speed range is from 100 r/min to 1500r/min. Figure of the two threephase 12/8 structure Switched Reluctance motor The power converter consists of two threephase asymmetric bridge power converter in parallel. The IGBTs were used as the main switches. Threephase 380V AC power source was rectificated and supplied to the power converter. The main circuit of the power converter was shown in Figure 2 Figure 2. Main circuit of the power converter . In the controller, there were the rotor position detection circuit, the mutation circuit, the current and voltage protection circuit, the main switches’ gate driver circuit and the digital controller for rotor speed closedloop and balancing the distribution of the loads. III. CONTROL STRATEGY The two Switched Reluctance motor could all drive the shearer by the transmission outfit in the same traction guide way so that the rotor speed of the two Switched Reluctance motors could be synchronized. The closedloop rotor
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