| 摘要 |
Method of controlling the current of a rotor in a semi-conductor and resistance-based starter with fully controlled valves, through the shorting of the rotor resistors in specified intervals of the half-period of the voltage of the rotor, characterized in that the semi-conductor valves (V1, V2, V3) are brought to a conducting state using the valve control blocks (BS1, BS2, BS3) at the start of positive half-periods of the voltage of the rotor of an inductive ring motor (M) appearing at the anodes of the valves (V1, V2, V3) and are kept in that state until a set maximum current in the rotor (I max) is obtained, at which, based on a signal from the current measurement block (BP1, BP2, BP3) for a given phase via the control block (BS1, BS2, BS3) for the same phase the valves (V1, V2, V3) are switched off, and starting resistors are connected in the rotor circuit (R1, R2, R3) causing current to flow and the voltage in the rotor to drop, then after the lower limit of current in the rotor (I min) is reached, the valves (V1, V2, V3) are again switched on based on a signal from the current measurement block (BPI1, BPI2, BPI3) using valve control blocks (BS1, BS2, BS3), and that cycle is repeated until the value of the phase voltage and current is reduced to zero.<IMAGE>
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