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Three-phase squirrel-cage AC (alternating current) asynchronous brake motor with high start moment

A braking motor and starting torque technology, applied in asynchronous induction motors, electrical components, electromechanical devices, etc., can solve the problems of inability to start, insufficient starting torque, different material weights, etc., to increase rotor resistance, improve work efficiency, The effect of increasing the starting speed

Inactive Publication Date: 2011-08-03
FUJIAN WONDER ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different types and weights of construction materials transported by construction elevators, it is often difficult to start the motor when starting materials with a critical weight, and it is even more difficult to start the motor for slightly overweight materials.
The main reason is that the bearing capacity of the motor can meet the requirements, but the starting torque is not enough
In this case, the lift cannot be effectively used

Method used

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  • Three-phase squirrel-cage AC (alternating current) asynchronous brake motor with high start moment
  • Three-phase squirrel-cage AC (alternating current) asynchronous brake motor with high start moment
  • Three-phase squirrel-cage AC (alternating current) asynchronous brake motor with high start moment

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Embodiment Construction

[0007] The electric motor of the present invention is composed of a machine base, a front cover, a rear cover, a stator, a rotor, a main shaft, a brake, a junction box and a fan, and is characterized in that the material of the rotor is machined after casting aluminum-manganese alloy HRA20-3.

[0008] Change the material of the rotor cast aluminum (that is, use high-resistance aluminum) to increase the rotor resistance and increase the starting torque. From the perspective of electromechanics, the electromagnetic torque of the motor is T=m1U1 2 R2 / ΩS((R1+K1R2 / S) 2 +(X1+K1X2) 2 ), the rotating speed is zero when the motor stalls, and now S=1, the electromagnetic torque at this moment is just the stall torque (i.e. starting torque), and the formula becomes: T ST =m1U1 2 R2 / Ω((R1+K1R2) 2 +(X1+K1X2) 2 ), where ml is the number of phases,

[0009] U1 is the voltage,

[0010] R2 is the rotor resistance,

[0011] R1 is the stator resistance,

[0012] S is the slip rate,

[0...

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Abstract

The invention discloses a three-phase squirrel-cage AC (alternating current) asynchronous brake motor with a high start moment, which relates to a three-phase squirrel-cage AC asynchronous motor. The motor comprises a base, a front cover, a rear cover, a stator, a rotor, a spindle, a brake, a junction box and a fan, and is characterized in that: the rotor material is made from an aluminum-manganese alloy HRA20-3 by casting and machining. The invention has the advantages that: as the motor product adopts excellent magnetic circuit design, and the cast aluminum rotor adopts high-quality aluminum-manganese alloy aluminum, the rotor resistance of the motor is effectively increased, and the motor obtains a relatively high start moment to drive the lift equipment to work. The start moment of a common three-phase squirrel-cage AC asynchronous brake motor is 2.0-2.3 times of the rated moment, and the start moment of the motor product can reach 3.3-3.5 times of the rated moment. When the start moment is increased, the start speed is increased and the working efficiency is improved, thereby facilitating the start of materials of critical weight.

Description

Technical field: [0001] The invention relates to a three-phase squirrel-cage AC asynchronous motor, in particular to a three-phase squirrel-cage AC asynchronous braking motor with high starting torque. Background technique: [0002] For material transportation on high-rise building construction sites, a motor with a high starting torque is required to drive the elevator to transport materials to the upper floors of the building. Existing lifts are driven by three-phase squirrel-cage AC asynchronous motors, which generally have braking mechanisms. The motor consists of a machine base, a front cover, a rear cover, a stator, a rotor, a main shaft, a brake, a junction box and a fan. The rotor is made of cast aluminum AL99.5%. The starting torque of this common three-phase squirrel-cage AC asynchronous motor rotor is 2.2-2.3 times the rated torque. Due to the different types and weights of construction materials transported by construction elevators, it is often difficult to st...

Claims

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Application Information

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IPC IPC(8): H02K17/16H02K1/02
Inventor 余壮翔
Owner FUJIAN WONDER ELECTRIC
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