IE5 three-phase asynchronous motor based on stator unequal-groove punching sheets and cast-aluminum rotor

Abstract

The invention discloses an IE5 three-phase asynchronous motor based on stator unequal-groove punching sheets and a cast-aluminum rotor. A rotor core of the motor is formed by laminating a plurality ofrotor punching sheets, each rotor punching sheet comprises an annular first substrate, a plurality of closed grooves are radially and uniformly formed in the outer annular surface of each first substrate along the circumferential direction of the first substrate, and aluminum conducting bars are cast in the closed grooves; a stator core of the motor is formed by laminating a plurality of stator unequal-groove punching sheets. Each stator unequal-slot punching sheet comprises a second substrate in a circular ring shape; stator groove groups used for placing copper wires are uniformly arrangedon the inner circular ring surface of the second substrate along the circumferential direction of the second substrate in a radial manner. The number of the stator slots of each pole and each phase ineach stator slot group is at least three, the stator slots comprise at least one large stator slot and at least two small stator slots, the large stator slot is arranged in the middle of the stator slot group, and the two sides of the large stator slot are respectively provided with one or more small stator slots; or at least one large stator slot, at least two middle stator slots and at least two small stator slots are included; the large stator slot is arranged in the middle of the stator slot group, two sides of the large stator slot are respectively provided with one or more small statorslots, one or more middle stator slots are respectively arranged between the large stator slot and the small stator slots, and concave slot wedges or convex slot wedges are plugged in the stator slotsembedded with the stator windings.

Description

technical field [0001] The invention belongs to the technical field of three-phase asynchronous motors, and in particular relates to an IE5 three-phase asynchronous motor based on stator unequal slot punching and a cast aluminum rotor. Background technique [0002] In 2014, the International Electrotechnical Commission IEC issued the IEC60034-30-1 "Energy Efficiency Classification of Single-speed, Three-phase Cage Induction Motors" standard, which unified the motor energy efficiency standards into four levels: IE1, IE2, IE3, and IE4, of which IE4 It is the highest efficiency level at present, that is, the highest efficiency level achievable by current technology. [0003] With the improvement of product performance index requirements in domestic and foreign markets, the highest grade IE4 motors in the current market will be replaced by IE5 grade motors. The target value of IE5 is determined by reducing the loss by about 20% based on the level of IE4. However, it is very di...

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Problems solved by technology

But obviously this kind of attempt will inevitably increase the cost of the product, and it does not meet the current purpose of energy saving and consumption reduction

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