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METHOD OF TURN-TO-TURN SHORT-CIRCUIT AND ROTOR SHIFT PROTECTION OF ELECTRIC MOTOR
METHOD OF TURN-TO-TURN SHORT-CIRCUIT AND ROTOR SHIFT PROTECTION OF ELECTRIC MOTOR
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机译：电动机的匝间短路和转子移位保护的方法
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摘要
FIELD: electricity.;SUBSTANCE: one controls the electric motor breaker position and records its switch-on point in the method of interturn short-circuit and rotor shift protection of electric motor. From this moment on, one keeps time ts, which is necessary for motor start, and constantly measures the magnetic fluxes sums from its first and second ends side. One compares the magnetic fluxes sum from the first end to the first protection operating value (reference standard), the magnetic fluxes sum from the second end - to the second reference standard, and these magnetic fluxes sums difference - to the third reference standard. Following of the end of the time ts, one switches the reference standards from the great one to the smaller in size. One constantly measures the power system bus voltage Ub of the electric motor and compares this voltage to the permissible voltage Uper simultaneously with the measurement of the magnetic fluxes sums from electric motor both ends and with the comparison of the sums difference among them to the relevant reference standards. In case of the exceedance of the magnetic fluxes sums or the difference among them of the relevant reference standards, one disconnects the electric motor. If the voltage is Ub≤Uper, then one keeps time tp, which is greater than the total protection operating time and the electric motor breaker opening, and switches the reference standards from the smaller ones to the greater ones in size. Once this is done, one keeps time tself, which is necessary for provision of the electric motor self-triggering, and switches the reference standards from the greater ones to the smaller ones in size at the end of this time. When the electric motor breaker opening by any cause, one switches the reference standards from the smaller ones to the greater ones in size.;EFFECT: enhancement of the sensitivity to the turn-to-turn short-circuit in the electric motor windings and to the rotor shifts along its direct axis.;2 dwg
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机译：领域：电力。实质：一种通过电动机的匝间短路和转子移位保护的方法来控制电动机断路器的位置并记录其接通点。从此刻起，保持电动机启动所需的时间t s ，并不断地从其第一端和第二端侧测量磁通和。将从第一端到第一保护工作值（参考标准）的磁通和，从第二端到第二参考标准的磁通和与第三参考标准的差相比较。在时间t s 结束之后，一个将参考标准从大小更改为较小。人们不断地测量电动机的动力系统总线电压U b ，并将该电压与允许的电压U per 进行比较，同时测量电动机的磁通和并比较了两者之间的总和与相关参考标准的差异。如果超过了相关参考标准的磁通总和或它们之间的差异，则断开电动机。如果电压为U b ≤U per ，则保持时间t p ，该时间大于总保护工作时间和电气保护时间。电机断路器打开，并将参考标准从较小的标准转换为较大的标准。完成此操作后，将保留时间t self （这是提供电动机自触发所必需的），并在参考值结束时将参考标准从较大的标准转换为较小的标准。这次。当电动断路器因任何原因断开时，会将参考标准从较小的标准转换为较大的标准。效果：增强了对电动机绕组中匝间短路和短路的灵敏度。转子沿其直轴移动。; 2 dwg
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