摘要:
Rotor windings (33,34) are wound on two salient pole type rotor cores (31,32), respectively, and the rotor windings on the salient poles adjacent to each other on the axial direction are connected in series. Diodes (35) are connected in parallel between the series connection nodes of the rotor windings. A plurality of rotor conductors (36,37) are provided on the periphery of and extending through the two rotor cores. Two stators (21,22) and two DC magnetic excitation windings (41,41) are provided surroundingly to face the two rotor cores. Number of poles of the stator is the same as that of the rotor core, and number of poles of the DC excitation windings is different from that of the rotor core. A voltage phase shifter (25) is provided to one of the two stators, which selectively produces a phase difference of 0° or 180° between two rotating magnetic fields produced around the two salient pole type rotor cores. The motor starts and accelerates according to the principle of an induction motor under the phase difference of 0° and, when the rotational speed of the motor approaches the synchronous speed, the motor is pulled into the synchronous operation by having the phase difference switched to 180° and having the DC magnetic excitation windings operated. Alternating voltages induced in the rotor windings by the static magnetic fields of the DC excitation windings are rectified by the diodes, and magnetic poles are formed on the two salient pole type rotor cores. The motor produces a large starting torque since it starts in the same principle as that of the conventional induction motor and, therefore, it does not require any such special starting means as a starter. During the synchronous operation, since the rotor windings function as field windings, the motor produces a large torque and does not require maintenance such as for brushes.
摘要:
A flour milling method and system therefor comprising the steps of separating (60) foreign materials from raw wheat, humidifying (70) the raw wheat, polishing (10) the raw wheat, and conditioning (40) the polished wheat, further comprises a step of cleaning (20) the polished wheat at a subsequent step of the polishing the raw wheat. The flour milling method and system therefor may further comprises a step of stirring (30) the cleaned polished wheat at a subsequent step of the cleaning step of the polished wheat. The bran powder which has been entered into the creases of the polished wheat at the polishing step, absorbs cleaning water and then flows out from the creases with the cleaning water. Since the bran powders in the creases of the polished wheat can be removed effectively, the milling efficiency is improved.
摘要:
An abrasive type vertical grain milling machine in which each of spacers (15) comprises a boss portion (21) fitted on a main shaft and a plurality of arm portions (22) extending from the boss portion in the radially outwardly and serving to induce bran removing air into a grain milling chamber through spaces between the circumferentially adjacent arm portions (22), is capable of discharging bran produced in the grain milling chamber with high bran discharging power and has little possibility that the bran removing power is reduced during operation.
摘要:
Rotor windings (33,34) are wound on two salient pole type rotor cores (31,32), respectively, and the rotor windings on the salient poles adjacent to each other on the axial direction are connected in series. Diodes (35) are connected in parallel between the series connection nodes of the rotor windings. A plurality of rotor conductors (36,37) are provided on the periphery of and extending through the two rotor cores. Two stators (21,22) and two DC magnetic excitation windings (41,41) are provided surroundingly to face the two rotor cores. Number of poles of the stator is the same as that of the rotor core, and number of poles of the DC excitation windings is different from that of the rotor core. A voltage phase shifter (25) is provided to one of the two stators, which selectively produces a phase difference of 0° or 180° between two rotating magnetic fields produced around the two salient pole type rotor cores. The motor starts and accelerates according to the principle of an induction motor under the phase difference of 0° and, when the rotational speed of the motor approaches the synchronous speed, the motor is pulled into the synchronous operation by having the phase difference switched to 180° and having the DC magnetic excitation windings operated. Alternating voltages induced in the rotor windings by the static magnetic fields of the DC excitation windings are rectified by the diodes, and magnetic poles are formed on the two salient pole type rotor cores. The motor produces a large starting torque since it starts in the same principle as that of the conventional induction motor and, therefore, it does not require any such special starting means as a starter. During the synchronous operation, since the rotor windings function as field windings, the motor produces a large torque and does not require maintenance such as for brushes.
摘要:
A method of analyzing granule grinding degrees includes steps of: passing granules between a coherent light emitter and a light receiver directly receiving a coherent light emitted from the coherent light emitter; measuring the time of each of the granules intercepting the coherent light and the frequency of such interception; and analyzing the measured granules by arithmetically processing the intercepted time, frequencies and predetermined coefficients. An apparatus for carrying out such method includes a passage (4) for granules to pass through and to intercept the coherent light between the coherent light emitter (1) and the light receiver (3), a counter (5) for counting from the outputs of light receiver (3) the interception time of the granules passing at the passage, a memory (7) for storing the outputs of the counter, frequencies of each of such output values and predetermined coefficients, and an arithmetic operator (6) for conducting calculation based on the information stored in the memory. This apparatus for analyzing granule grinding degrees can be advantageously incorporated in a granule grinder for its roll space adjustment.
摘要:
A method of analyzing granule grinding degrees includes steps of: passing granules between a coherent light emitter and a light receiver directly receiving a coherent light emitted from the coherent light emitter; measuring the time of each of the granules intercepting the coherent light and the frequency of such interception; and analyzing the measured granules by arithmetically processing the intercepted time, frequencies and predetermined coefficients. An apparatus for carrying out such method includes a passage (4) for granules to pass through and to intercept the coherent light between the coherent light emitter (1) and the light receiver (3), a counter (5) for counting from the outputs of light receiver (3) the interception time of the granules passing at the passage, a memory (7) for storing the outputs of the counter, frequencies of each of such output values and predetermined coefficients, and an arithmetic operator (6) for conducting calculation based on the information stored in the memory. This apparatus for analyzing granule grinding degrees can be advantageously incorporated in a granule grinder for its roll space adjustment.