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862results about "Synchronous machine details" patented technology

Hybrid excitation Motor

The present invention discloses a hybrid excitation motor. The comprises a stator and a rotor which are coaxially sleeved with each other; grooves are formed in the inner wall of the stator which sleeves the rotor or the rotor which sleeves the stator along the circumferential direction of the inner wall; grooves are formed in the outer surface of the rotor which is sleeved with the stator or the stator which is sleeved with the rotor; a direct-current excitation winding and an alternating-current armature winding are arranged in the stator grooves; each stator tooth is provided with protrusions which protrude out from the corresponding groove and are located at side surfaces of two sides of the groove; each protrusion is provided with a permanent magnet; the polarities of the two permanent magnets arranged at the two side surfaces of each stator tooth are the same; and the polarities of the permanent magnets of two adjacent teeth are opposite. When the motor of the invention operates at a low speed, current in the direct-current winding is positive, a total excitation magnetic field can be enhanced, and the overload capacity of the motor can be improved; and when the motor operates at a high speed, the current in the direct-current winding is negative, the total magnetic field can be weakened, and the flux weakening ability of the motor can be improved. The excitation motor of the invention has the advantages of low risk of irreversible demagnetization of the permanent magnets, small magnetic resistance of excitation magnetic fields, strong flux adjustment ability of the excitation windings and reliable and stable operation. According to the motor of the invention, slip rings and electric brushes are not needed, and therefore, problems such as the problem of sparks can be avoided.

Arc driving heavy caliber astronomical telescope

An arc-driven large-bore astronomical telescope is driven by a RE permanent-magnet synchronized arc motor. A control mechanism includes an upper machine and a lower machine; the upper machine is connected with the lower machine through serial communication; the lower machine carries out the real-time control; a motor stator is composed of 15 blocks, each block consists of 9 complete silicon steel plates and two silicon steel plates for reducing the edge effect; an armature winding is arranged according to UVWUVWUVW from right to left; a rotor is composed of 4 blocks and has 120 magnetic steel plates in total, the rotor adopts the torque design for reducing tooth space and is provided with a fastening device; an absolute coder and an incremental coder are simultaneously arranged in the control mechanism signal collecting and comparing links, the former is used for the turnover of a servo motor and the latter is used for testing the position of the servo motor; the signal of the coder is transferred to the DSP module of the lower machine through a singlechip; a drive circuit adopts a digital-driven intelligent power module. The present invention can achieve the needs of long-time, high-precision tracing and observing various celestial bodies and meet the requirements of precision and wide speed regulation in astronomic observation.

External rotor car permanent magneto

An external-rotor type permanent-magnet generator for vehicles: a rotor and a stator are both mounted in a housing which consists of a front end cover and a rear end cover; the stator is firmly arranged on the rear end cover; the permanent-magnet rotor is positioned outside the stator; a centrifugation fan is mounted on the rotor in the rear end of the rotor; the permanent-magnet rotor is composed of a rotor case and a tile-shaped permanent magnet; the front end of the rotor case comprises a vent hole; a centrifugation fan is exposed to mount in the vent hole. During operation, the rotor is driven to rotate via an engine, so that two cooling air circuits will be formed inside the motor: one circuit is a cooling air circuit formed by the centrifugation fan on the rear end of the rotor; the circuit is mainly used to cool the rectification voltage stabilizer; the other circuit is a cooling air circuit that is formed with the rotor centrifugation fan exposed out of the rotor housing; the circuit mainly adapts to cool the rectification voltage stabilizer and the stator. Compared with the prior art, the invention has advantages of high utilization rate of iron core materials, convenient stator coiling, simultaneous effects with the two centrifugation fans, perfect heat radiation effects, low temperature of the stator and the rectification voltage stabilizer, and reliable operation.
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