Explosion proof type three phase alternating current asynchronous motor used for electric automobile

Abstract

The invention discloses an explosion proof type three phase alternating current asynchronous motor used for an electric automobile, which is provided with an explosion proof type housing, an explosion proof type junction box, a stator and a rotor, wherein a low loss cold rolled silicon steel plate is made of magnetic materials, the electromagnetic loads of the silicon steel plate are 1.0-1.45T of stator tooth flux density, 0.9-1.2T of stator yoke flux density, 1.0-1.4T of rotor tooth flux density, 0.6-0.9T of rotor yoke flux density, 0.5-0.65T of air-gap flux density, 3.0-5.5A / mm2 of stator winding electricity density, 1.2-3.5A / mm2 of rotor conducting bar electricity density and 180-280A / cm of line load; the stator and rotor air gap is 1.1-1.3 times larger than the air gap of industry YB2 series under the same power pole number, slot coordination is 24 / 22, the slot shape of the rotor is a pear shape with a round bottom and the like, a delta connection method or a Y connection method of maximum parallel branches is adopted for the three phase winding of the motor, and the rotor is a mouse-cage rotor; and H-level insulation and an IBGT (Insulated Gate Bipolar Transistor) insulated system are adopted for the motor. The explosion proof type three phase alternating current asynchronous motor operates safely and reliably in an explosive gas environment, is efficient and energy-saving, and has high torque, small vibration, low noise and large temperature rise margin.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a flameproof three-phase AC asynchronous motor for electric vehicles Background technique [0002] In the 21st century, environmental pollution is a major problem faced by countries all over the world. Under the guidance of China's industrial policies of environmental protection, energy saving, emission reduction, and safety, especially the continuous increase in the output of my country's coal industry, electric vehicles, which are used as coal mine underground transportation tools and have flameproof performance, have recently developed rapidly. From the perspective of safety and ecological protection, electric vehicles with explosion-proof performance are more popular in industries that may produce explosive gas environments such as coal mines, petroleum, chemicals, ordnance, and grain and oil storage warehouses. The development of YBKD series explosion-proof three-phase AC as...

AI Technical Summary

Problems solved by technology

The use of inverters for power supply will damage the motor insulation, so the motor must use better materials than ordinary motors. In addition, the motor for electric vehicles is limited by the space of the vehicle, and the overall structure is quite different from that of ordinary flameproof motors.

This will inevitably increase the technical difficulty and cost of design and development, which is also a technical problem that the technicians have been exploring and overcoming.

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