ZSN4 Series DC Motor For Cement Rotary Kiln

Tructure Feature

Moter cooling type and protection class pls refers to form 1.

Motor mounting types: horizontal foot mounting (IMB3), motor could be designed as double shaft extension or singleshaft extension. Tacho-generator could be fixed at the non-drive end side of single shaft extension motor. Commonly

used permanent magnet DC tacho-generator models are shown in Table 2. Other specifications of the tacho-generatoror rotary encoder could also be negotiated.

lf necessary, overheating protection thermal components ccould be embedded in the statorwindinqs of the motor, thermal components mode os be soecifed in the contract.

The location of terminal box could be fixed at the not side of the motor, view from the shaftextension, could also be fixed in the left side or above of the motor if necessary.

Moter Function

1Data isted in the technical data sheet shouldle employedunder the fouowing conditions:

a Aittude above sea level max.1000m;

b Cooling air temperature max.40 C;

C Duty: Continuous (S1)

d Amature and feld circuit for motors may be either operatedon static thyristor controlled supplies, or from d-c generator.

e Motor tor tube ventilation and coolinq, the pressure of the aiwokume need to meet the requirements in Table 3, the air inletis located on end shield of the motor commutator side

2Petormances of motors all comply with State Standard GB755-2000Rdtatng electrical machines-Rating and performance》 , also be inaccorcance wih the requirements of evaluation of the InternationalBedtdechnical Commission standard IEC 34-1

3 ctr manufactured as F insulation.

4Suzrcard rated voitage: 440V, 220-volt or other voitage can also beceed umder te specific circumstances.constant terque speed controloud be done by Reducing armature volatge.The lewest speed could beausted to 2orimin under the circumstance of continalusly anmatrue currentMeannrie cnoters could still remain the rated terque with smoothly speed.5 Nomtnx teld voltage: 180V, other excitation voltage are also acceptableon ieouest

To assure the relliability of insulation of excitation system, the motor mustbe rotected against self-induced voltaqes by a release resistor connectedin parate with the feld winding when the excitation circuit of the motor isinternuoted At rated held winding resistance(cold).While the field voltage ishicher than nominal voitage, the value of shunt resistance may be lower thanseven- tmes feld resistance, otherwise higher than seven-times

6 ZsN4-225 motor adopts series field winding. others adopts compensatingwinding

7. A marked earthing terminal is provided for the motors.

a The efhciencies listed in the data sheet are for rated output, voltaqe andsoeed and include excitation losses

Feature and applications

SN4 series DC motor is desiqed based on Z4 series DC motor, it isthe exclusively used as main drive motor for cement rotary kilm

This series of motors adope octagon shape to take good use ofinner space of moter. The motors have laminated yokes, which meansthat when used on rectifier power supplies they can endure both currentripple and rapid current changes (load change) under dynamic condition.The stator design leads to high accuracy of pole spacing and consequentgood commuication. The motors could be lastingly operated from fullywhosecontrolled threephasebridgewith outasmoothingreactor,indractance is specified in the relevant technical data, should be insertedin the armature circuit to suppress nipple circuit Motors are class Finsulated, ensuring dissipation.

Dielectric Perfommance And Excellent Heatstable

Designed exclusively according to special working c8onditions of cementrotary kilm, this series of motor could reach starting torque 2.5 times ofrated torque. Adopting tube ventilation and cooling method, motors couldbe operated safely under bad circumstance full of dust and powder.