A radial permanent magnet drive motor for an electric van transport vehicle

Abstract

The invention provides a power-driven compartment transport vehicle radial permanent magnet drive motor and belongs to the technical field of vehicle drive motors. The power-driven compartment transport vehicle radial permanent magnet drive motor comprises a front end cover (10), a rear end cover (1), a casing (8), a rotor and a stator (9), and is characterized in that the rotor is a radial permanent magnet rotor with a pole shoe; the radial permanent magnet rotor with the pole shoe comprises a shaft (2), a rotor core (3), a plurality of bolts (5), tile permanent magnet steels (6) and the pole shoe (7), the rotor core (3) is mounted on the shaft (2) in a pressed manner, an even number of the tile permanent magnet steels (6) are fixed on the excircle of the rotor core (3) in a way that the N poles and S poles are arranged on convex sides at intervals, and the pole shoe (7) is fixed on the outer rings of the tile permanent magnet steels (6) through the bolts (5). The magnetic field of the power-driven compartment transport vehicle radial permanent magnet drive motor is provided by the permanent magnet steels, electric field windings are not required, power consumption is less, a carbon brush or a mechanical commutator is not required, and the failure rate is low.

Description

Technical field [0001] A radial permanent magnet drive motor for an electric van transport vehicle belongs to the technical field of vehicle drive motors, and specifically relates to a vehicle permanent magnet drive motor. Background technique [0002] At present, most of the drive motors used with electric vans use DC motors with carbon brushes and mechanical commutators. Although the DC motors have simple structure, high controllability, wide speed range, relatively simple control circuits, and relatively low cost Low, but because the magnetic field of the DC drive motor is generated by the electric excitation winding, it consumes a lot of electric energy and the output power is small. In addition, due to the presence of carbon brushes and mechanical commutators, it not only limits the increase in the overload capacity and speed of the drive motor, but also In operation, frequent maintenance and replacement of carbon brushes and commutators are necessary, so the DC motor consum...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the driving motors used with electric vans are DC motors with carbon brushes and mechanical commutators. Although DC motors have simple structure, high controllability, wide speed range, relatively simple control circuit and relatively low cost. Low, but because the magnetic field of the DC drive motor is generated by the electric excitation winding, the power consumption is large and the output power is small. In addition, due to the existence of carbon brushes and mechanical commutators, it not only limits the increase in the overload capacity and speed of the drive motor, but also if it lasts for a long time It is necessary to maintain and replace the carbon brush and commutator frequently, so the DC motor consumes a lot of energy and has a high failure rate

For example, the patent number is: ZL200920116549.1, and the patent name is: the patent of the brushless DC motor rotor, which discloses the following technical scheme, including the rotor core, the rotating shaft and the permanent magnet. The rotating shaft is fixedly connected with the rotor core. There are an even number of T-shaped wedges evenly distributed on the outer surface of the rotor core. Slots are formed between adjacent T-shaped wedges. The permanent magnets are correspondingly embedded in the slots. The permanent magnet of the rotor with this structure The magnet directly faces the air gap, and under the action of the armature reaction of the impact current, irreversible demagnetization may occur. Once the permanent magnet forms irreversible demagnetization, the efficiency of the motor will decrease, and the power and torque will drop rapidly. Its performance needs to be further improved.

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