Cylindrical linear switched reluctance motor with permanent magnet ring mover

Abstract

The invention discloses a permanent magnet ring rotor cylindrical linear switch reluctance motor which comprises a stator cylinder and a rotor cylinder. The stator cylinder comprises a stator magnet guide ring and a non-magnet-guide stator sleeve. The stator magnet guide ring is fixed on the non-magnet-guide stator sleeve or is coaxially spliced with the non-magnet-guide stator sleeve to form the stator cylinder. The rotor cylinder comprises a rotor iron core which is once formed or is provided with a plurality of parts which are spliced in the axial direction, rotor teeth, an annular rotor groove and a rotor yoke part are arranged on the rotor iron core, and a set of rotor coil and a permanent ring are placed in the annular groove. According to the permanent magnet ring rotor cylindrical linear switch reluctance motor, the permanent magnet ring and the rotor coil are used for together providing an excitation magnetic field, the useful flux utilization rate is improved, a stator yoke part is omitted, the amount of used materials for manufacturing the motor iron core is lowered, the utilization rate of the iron core materials is improved, phase insulation is omitted in the rotor groove, the manufacturing process is simplified, the groove utilization rate is improved, and the advantages of being high in propulsion density, simple and reliable in structure and the like are achieved.

Description

technical field [0001] The invention relates to a cylindrical motor, in particular to a cylindrical linear switched reluctance motor with a permanent magnet ring mover. Background technique [0002] The linear motor directly converts electrical energy into mechanical energy of linear motion, which not only omits the intermediate transmission mechanism, but also reduces system loss, and is very suitable for linear direct drive systems. [0003] Cylindrical linear motor is a closed cylindrical mechanical structure. Since the motor core is closed, there is no lateral break and no lateral edge effect. The magnetic field inside the motor is evenly and continuously distributed along the circumference, and the propulsion force density is high. The inner stator slot of the cylindrical linear motor is ring-shaped, the motor winding is concentric winding, there is no end winding, the utilization rate of the winding is high, and the copper consumption is low during operation, which is ...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of the reluctance torque, the propulsive force density of the motor is low. Therefore, it is an urgent problem to be solved to improve the propulsive force density of the cylindrical linear motor.

In addition, the existing cylindrical linear switched reluctance motor has a mover yoke, the motor mover is heavy, only a part of the magnetic circuit is effectively used when the winding is energized, the utilization rate of the ferromagnetic material of the motor is low, and the power density and propulsion density are low

In addition, in many applications, the linear motor runs at a low speed, which is a low-speed high-thrust drive system. The motor has large magnetic flux leakage and high copper consumption during operation, resulting in low motor efficiency.

[0011] In the cylindrical linear switched reluctance motor, the use of the magnetic permeable ring structure can save the iron core yoke, reduce the mass of the mover, and increase the propulsion density, but there are still large magnetic flux leakage, low effective flux utilization and copper loss. high disadvantage

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