CN205960916U - Big torque permanent magnetism exchanges torque motor in step - Google Patents

Abstract

The utility model relates to a big torque permanent magnetism exchanges torque motor in step, including casing (1), cooling trough (2), stator core (3), stator coil (4), rotor core (5), magnet steel (6), subtract lotus hole (7) and main shaft (8) because decide, rotor structure's special design, the stator that has adopted high tooth groove density and the rotor magnetic pole of permanent magnetism by force, rated torque is 6.16Amm2 up to 3300Nm, current density, efficiency 93.35%. Is appearing the output torque maximize with the equal -volume lower excess. The polar arc coefficient em0=0.866 who optimizes, tooth's socket torque amplitude is minimum, tcog. Min=1.4377 10 10Nm, cogging are very little, almost free of fluctuation.

Description

Large torque moment permanent-magnet synchronous AC torque motor

Technical field

This utility model belongs to motor designs and manufacturing technology field and in particular to a kind of large torque moment permanent-magnet synchronous AC Torque motor.

Background technology

Torque motor is a kind of specific type of electric machine with soft mechanical characteristic and wide speed regulating range.The axle of this motor be not with The power of constant power output, but the power with constant moment of force output.Torque motor includes：Direct current torque motor, ac torque electricity Machine, brushless D. C. torque motor and permanent magnet synchronous torque motor etc..

When load torque increases, the rotating speed of motor can automatically decrease, and output torque increases, and keep and bear Carry balance.The locked-rotor torque of torque motor is high, and locked rotor current is little, and the stall that can bear certain time runs.When load torque is During steady state value, change the terminal voltage just adjustable speed of motor, add a speed measuring device usually on motor shaft, mix controller, profit Compared with the voltage that the voltage of speed measuring device output gives with controller, carry out the terminal voltage of self-regulation motor, make motor stabilizing. But adjusting speed accuracy is not high, the regulation of rotating speed is undesirable.Its dress that tests the speed of permanent magnet synchronous ac torque motor of the present utility model Put, the river TS2640N321E64 encoders (1024 line) that rub employing Japan it is adaptable to general drive system, speed governing model more Enclose width, adjusting speed accuracy is high.The torque motor of domestic production at present, either exchanging or direct current, one of generally existing Problem is the stability of operating, and especially in the case of being not powered on, the rotation of axle has significantly interruption vibration sense.This utility model Torque motor, due to employing the particular design of stator, rotor structures, this kind of vibration sense disappears, and during normal work, operating is very flat Surely.Another feature is that the torque of output is big, contrasts the same size product of domestic famous brand name, such as Shenzhen Hui Chuan company and Wuhan The torque motor that Deng Qi company produces, the nominal torque of this utility model permanent magnet synchronous torque motor is high 1.5 times.

Content of the invention

This utility model large torque moment permanent-magnet synchronising torque motor, is made up of stator and two critical pieces of rotor, including Casing (1), bosh (2), stator core (3), stator coil (4), rotor core (5), magnet steel (6), off-loading hole (7) and master Axle (8), stator core (3) is contained in casing (1) using snap fit, uniform 72 wire casings in stator periphery, and stator is mutually double-deck for 3 Winding construction, every 8 strands of groove, every strand by 22 diameter 0.9mm copper cash and around；The uniform 16 blocks of magnetic in rotor core periphery Steel, magnetic steel material adopts NdFeB N38UH, remanence strength 1.24T, strong power 2600KA/m.

This utility model due to the particular design of stator, rotor structures, employs the stator of high teeth groove density and strong permanent magnetic Rotor.Simulation analysis result：Nominal torque is up to 3300Nm, and electric current density is 6.16A/mm², efficiency is 93.35%.Equal Achieve output torque under volume to maximize.

Additionally, this utility model takes effective measures to reducing cogging torque fluctuation, by the pole embrace to magnet steel It is optimized and adopts 5 ° of skewed slot, as pole embrace (ratio to magnetic pole pole span for the magnetic pole polar arc width) em=0.866, teeth groove turns Square range value is minimum, Tcog.min=1.4377 × 10^-10Nm, slot effect is little, almost without fluctuation.

Torque motor due in the slow-speed of revolution and during stall, because the big heat producing of loss is also big, typically to 100 supports Torque motor more than number is on rear end cap equipped with independent axial-flow type or centrifugal fan.For realizing energy-conservation, this utility model Large torque moment permanent-magnet synchronous AC torque motor, 12 being communicated with casing bosh, employ nature water-cooled The type of cooling, for providing big torque to create radiating condition.

Brief description

Fig. 1 is the structural plan of large torque moment permanent-magnet synchronous AC torque motor, wherein, 1- casing；2- bosh； 3- stator core；4- stator coil；5- rotor core；6- magnet steel；7- off-loading hole；8- main shaft.

Fig. 2 is the profile of stator structure, in figure, 3- stator core；4- stator coil.

Fig. 3 is the profile of rotor structure, in figure, 5- rotor core；6- magnet steel；7- off-loading hole；8- main shaft.

Specific embodiment

Large torque moment permanent-magnet synchronous AC torque motor of the present utility model includes：Casing (1), stator core (3), stator Coil (4), rotor core (5), magnet steel (6) and main shaft (8), the stator and rotor iron core of this torque motor is by the silicon of 0.5mm Steel disc punching is overrided to form, and stator opens up 72 rule slotted eyes, and every groove has 8 strands of rebuilding, each strand By 22 diameter 0.9mm QCy-2/180 enamel covered wire and around, every groove is embedded with 176 copper cash altogether, copper factor be 71.6%.

In order to reach accurate control, speed measuring device employs river TS2640N321E64 (1024 line) encoder that rubs Japan more, Thus supporting driver can achieve generalization, this is also one of advantage of this utility model torque motor, applied widely, existing Former hydraulic injection molding machine can be changed to full electric injection molding machine, energy saving, smooth running, application effect is good.

Claims (4)

1. a kind of large torque moment permanent-magnet synchronous AC torque motor, including casing (1), bosh (2), stator core (3), determines Subcoil (4), rotor core (5), magnet steel (6), off-loading hole (7) and main shaft (8), stator core (3) is loaded on stator cage (1) Interior, stator coil (4) is embedded in the wire casing of stator core (3), and rotor core (5) is fixed on main shaft (8), rotor core (5) inner circle has 8 off-loading holes (7) to mitigate weight, magnet steel (6) be distributed in the cylindrical of rotor core (5) it is characterised in that Casing (1) is provided with the bosh of 12 connections, and the type of cooling adopts nature water-cooled.

2. large torque moment permanent-magnet synchronous AC torque motor according to claim 1 is it is characterised in that stator is 72 groove knots Structure, the uniform 16 blocks of magnet steel of rotor outer circle, magnetic steel material is N38SH.

3. large torque moment permanent-magnet synchronous AC torque motor according to claim 1 it is characterised in that optimize magnet steel pole Arc coefficient em₀=0.866, according to this pole embrace magnet steel shape and size it can be ensured that cogging torque amplitude Tcog is minimum, Least cogging torque amplitude Tcog.min=1.4377 × 10^-10Nm.

4. large torque moment permanent-magnet synchronous AC torque motor according to claim 1 is it is characterised in that be mounted with rotating shaft TS2640N321E64 encoder, the resolution of encoder is 1024 lines, can achieve the generalization of supporting driver.