采煤機(jī)外文翻譯---電牽引采煤機(jī)的開(kāi)關(guān)磁阻電動(dòng)機(jī)-文庫(kù)吧
2025-11-01 17:06 本頁(yè)面
【正文】 ry 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 speed control of the double Switched Reluctance motors parallel drive system could be implemented by PI algorithm. In the Switched Reluctance motor 1, the triggered signals of the main switches in the power converter are modulated by PWM signal, the parison of the given rotor speed and the practical rotor speed are made and the duty ratio of PWM signal are regulated as follows, where, is the given rotor speed, is the practical rotor speed, is the difference of the rotor speed, is the increment of the duty ratio of PWM signal of the Switched Reluctance motor 1 at k time, is the integral coefficient, is the proportion coefficient, ek is the difference of the rotor speed at k time, ek1 is the difference of the rotor speed at k1 time, D1(k) is the duty ratio of PWM signal of the Switched Reluctance motor 1 at k time, and D1(k1) is the duty ratio of PWM signal of the Switched Reluctance motor 1 at k1 time. The output power of the Switched Reluctance motor drive system is approximately in proportion to the average DC supplied current of the power converter as follows, where, P2 is the output power of the Switched Reluctance motor drive system, Iin is the average DC supplied current of the power converter. In the Switched Reluctance motor 2, the triggered signals of the main switches in the power converter are also modulated by PWM signal. The balancing the distribution of the loads between the two Switched Reluctance motors c
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