Electrical Technology Exchange Post----Motor
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Electrical technology exchange post----Motor 1st floor: 1-100 2nd floor: 101-200 3rd floor: 201-319 1The maximum speed of high-speed motor 2What is the differential protection of the motor? 3 Questions about motor overload 4 Questions about motor 2P and 4P specifications 5 How to calculate stepper motor power? What parameters do you need to know? 6. Energy saving of the motor. 7. Questions about the direct start of the motor. 8. In order to prevent the 6000V motor from tripping accidentally, our factory shortens the stator temperature, is that good? 9. The motor speed is 3600 rpm. 10. The motor causes the pump to rotate? 11 High-voltage motor fault identification 12 How to determine the motor frame number of the canned pump 13 The current of the motor 14 The problem of tripping and restarting the motor with variable frequency 15 The high and low current interlocking of the motor 16 Motor installation problems 17 Mitsubishi PLC programming controls the forward and reverse rotation of the three-phase motor 18 Asynchronous motor electrical Liuda 19 [Daily Question 20090216] How long is the output motor line of a frequency converter generally required to be equipped with an output reactor? 20 List of DC motor terms 21 Regarding the difficulty in starting and easy tripping of variable frequency motors 22 Why do pump supporting motors need to be equipped with heaters, and under what circumstances does they work? What is the difference between 238-pole motor and 10-pole motor? Debugging of 24-pole motor? Daxiajin 25 [Daily Question 20090214] Can the power line and motor line of the frequency converter be swapped? 26 The moving equipment is equipped with a domestic motor working at 60hz, 440v 27 Motor current detection 28 Can the motor sealing performance be improved by itself? 29 About stepper motors and servo motors 30 How to choose and calculate the frequency conversion motor 31 The classification of the motor 32 What is the difference between domestic motors and foreign motors? 33 Motor frequency conversion modification 34 How to judge the abnormal sound of motor bearings 35 Our workshop often burns the motor, does the protector not work? There's still something fishy going on. 36How to determine the direction of rotation of a motor that is not allowed to rotate? 37 How to identify the motor of the frequency converter 38 [Daily question 20090127] What is the reason for the circuit breaker tripping when the soft starter starts the motor? 39 What is the frequency range of the variable frequency motor? 40 The motor works above 50HZ. 41 [Daily question 20090126] When the soft starter controls the motor that starts frequently, how to deal with the starting interval? 42 [Daily question 20090125] Soft start setting current limit starts the motor. What to do when it cannot start? 43 Daily maintenance precautions for the motor 44 The difference between plateau motors and plain motors 45 Water-cooled alternator 4 6 Do wind turbines need a lubrication station? 47 What do the motor parameters mean? 48 Some knowledge about GENERAL general motors. 49 Synchronous motor excitation information for help. 50 Causes and preventive measures of vibration motors. 51 What is the principle of variable frequency motors? 52 Motor temperature and temperature rise. 53 Maintenance of DC motors. 54 Variable frequency motor air cooling issues. 55 Frequency converter and motor manufacturers summary (welcome to add). 56 Is there any information about frequency modulated motors? 57 How to estimate the starting current of the motor? 58 The frequency and power of the motor are related. 59 How is the excitation of the synchronous motor realized? Can changing the polarity of the excitation voltage change the direction of the motor [Daily Question 20090108] 60 Questions about motors running at high frequencies 61 How many pump motors can one inverter control? What is the data collected by the detector supporting the inverter? 62 What is the main difference between synchronous motors and asynchronous motors? [Daily Question 20090107] When the 63 motor is running, the bearing temperature is too high. Where should we look for the cause? [Daily Question 20090105] 64 The reason why the generator generates shaft voltage 65 Related galaxies of the generator set 66 Under what circumstances should the motor be installed vertically or horizontally? 67 What are the advantages and disadvantages of vertical installation and horizontal installation of motors? 68 How to accurately diagnose motor electrical faults 69 Problems with speed-regulating motors 70 The neutral point of the three-phase winding of the motor touches the ground, does the leakage switch trip? [Daily question 20090102] 71 Detection of the coil of DC servo motor 72 Performance comparison of stepper motor and AC servo motor 73 Coil resistance problem of DC servo motor? 74 What are the operating procedures, operation procedures and maintenance procedures of diesel generators? 75 Driving principle of DC servo motor 76 Harm of phase loss operation to the motor and countermeasures. 77 Motor operation issues 78 What is the basis for motor selection? 79 What does the speed ratio of the motor mean? 80 Battery to charger adaptive question 81 How many ways are there to connect the motor windings and what are the differences? 82 Exchange of experience in running high-voltage motors. Good answers will be rewarded. 83 About the shaft current of the motor 84 Self-ignition in the motor 85 Please leave a post here if you are engaged in three-phase synchronous motors 86 DQZ-II anti-sway intelligent motor controller 87 Can I work in a refinery after graduating from a motor and electrical major? 88 Generator set selection parameters 89 Generator stator grounding 90 I would like to ask for advice: What is the difference between motor models and levels? 91 Generator routine test operation instructions 92 Frequency converter and motor 93 Motor temperature and temperature rise 94 Working principle of generator 95 What is the minimum number of revolutions of variable frequency motor? 96 Causes of unbalanced current in three-phase motors 97 Causes of generator rotor oscillation and analysis of the resulting heat 98 Why does the generator speed not increase when the turbine increases air intake? 99 Transformer distribution room and generator room floor plan 100 How to match the inverter with the motor
101 How to reduce the air intake of a motor driven fan 102 Problems about starting large motors in petrochemical industry 103 Problems with positive pressure ventilation of explosion-proof motors 104 Problems with the number of motor cores, please help 10510KV high-voltage motor 106 Three-phase winding temperature of the front and rear axles of the motor 107 Synchronous speed of the motor 108 Under what circumstances does the motor use a reduced voltage start 109 What technology is used to save power in the motor 110 How long can a boiler vibration motor generally run? 111 Friends who use synchronous motors leave their contact information here 112 132KW, 75KW motor needs to be installed with what size inverter 113 What kind of grid connection method does your factory's generator use? 114 Try to analyze what is the reason why the generator cannot raise the voltage? 115 Motor frequency converter 116 I am a craftsman, and I would like to ask why some motors can run at overcurrent? 117 Motor frequency conversion transformation 118 DC motor was burned!! 119 The relationship between motor power and wire diameter? How to calculate 120 The front bearing always appears after installing a frequency converter on a 280KW motor 121 How to deal with the motor end cover running 122 Please tell me, the three-phase current of the motor is unbalanced, how to measure the resistance of the motor winding? 123 The composition of the generator excitation system and the generator automatic voltage regulator (AVR) 124 How many energy-saving methods are there for large motors? 125 The impact of high and low voltage on motor current 126 There is an unusual problem in the motor, please help solve it 127 What is the reason for the phase loss of the well pump motor? What conditions should be met for 128 generators to be synchronized manually? 129 Motor efficiency What protections should be installed on 130 generators? 13115kw 4-pole motor cable 132 Technical characteristics of the motor at ultra-low temperature 133 Load current and no-load current of the motor 134 Star-delta starting time of high-power motor? 135 Asynchronous motor/synchronous motor/stepper motor/servo motor Machine basics 136 Commonly used Chinese and English comparisons in the motor industry 137 Who knows the wire diameter, copper wire length, and weight of motor windings 138 Design suggestions for single inverter-multiple motor control methods 139 Why is it necessary to conduct no-load characteristic tests on synchronous generators? 140 Generator 141 What is the no-load current of the motor generally equal to the rated current of the motor? 142 Motor starting 143 Motor selection 144 Motor starting current 145 What is there about the motor? * * standard? 146 Who has the Electrical Engineering Handbook (Second Edition) (6) Application Volume (1) Chapter 1 Industrial Electric Heating Equipment 147 The problem of asynchronous motor speed 148 How to choose the motor margin coefficient? 5 questions about 149 motors! ! ! ! ! ! 150 Motor standard help 151 The number of revolutions of the motor 152 The causes and hazards of the negative sequence protection action of the generator 153 Relevant regulations for the normal operation of the generator 154 Abnormal sound of the generator 155 Precautions for replacement and maintenance of the generator carbon brush 156 Relevant regulations for the normal operation of the generator 15722KW motor What size switch should be selected? 158 What is the starting method of motor soft start? 159 Problems with single-phase motors? 160 Does this motor need to be rewinded? 161 The forum about "variable frequency motor" sorting out 162 Does anyone have information on the comprehensive motor protector? 163 What harm does a too high power factor do to the long-term stable operation of the generator? 164 Steering of high-voltage motor 165 Comparison of the advantages and disadvantages of motor speed regulation using frequency converters and hydraulic couplings 166 Causes and hazards of generator negative sequence protection action 167 Determination of motor power and speed. 168 Motor related terms 169 Motor current and speed 170 What should I do if the motor reverses? 171 Selection of high-voltage motor 172 Motor housing size IEC standard 173 What are the causes of motor tripping? 174 Please tell me how much cable a 90KW motor needs to be equipped with. 175 What is the difference between asynchronous motor and synchronous motor? 176 How many situations are there when the three-phase current of the motor is unbalanced? 177 The difference between variable frequency motors and ordinary motors 178 What is synchronous motor "SBZ" technology 179 Generator excitation system cable list 180 Motor drive circuit 181 Regulations on electrical equipment status and generator standby status 182 Motor efficiency issues. 183 Does anyone know which domestic company has applied high-voltage variable frequency motors? Introduce the usage. How to control the forward and reverse rotation of 184 servo motor? 185 Monitoring and maintenance during generator operation 186 What is the reason for the unequal voltage or current of the three-phase motor? 187 Consultation on the requirements for intelligent low-voltage motor protectors 188 The dangers of generator demagnetization 189 The difference between explosion-proof motors and ordinary motors 190 How to interpret the generator model 19130KW motors What size bearings should be used? 19255KW motors What diameter cable is more economical and suitable? What are the requirements for the use of 193 excitation motor and 194 explosion-proof motor? 195 Wind turbine generator set 196 Winding type asynchronous motor rotor collector ring brush selection, issues that should be paid attention to during use 197 What do Division, group, and class mean in the motor 198 Generator axial displacement 19975KW water pump backup generator How to select? 200GCA-30A/6-36V silicon rectifier charger
201 Selection of the capacity of self-provided generator 202 If the stator temperature and front and rear bearing temperature of the motor are monitored, what is the maximum suitable value? 203 Why is the speed of synchronous motor higher than that of asynchronous motor? 204 Can the motor be flushed with water? 205 How often does an ABB motor need to be refueled? 206 How does a technology professional understand the motor control symbols in the picture on the home page? 207 Synthetic ammonia nitrogen and hydrogen compressor motor 208 Performance comparison of stepper motors and AC servo motors 209 Operating frequency of servo motors 210 How to convert motors above 55kw 211 Temperature and temperature rise of motors 212 Does the frequency converter change the rated power of the motor 213 Which manufacturer's explosion-proof motor has better quality? 214Which brand of domestic diesel generator is better? 215 Synchronous motor inverter 216 How to calculate motor starting after using soft starter 217 Principle of doubly-fed motor 218 Does anyone have the latest price of Nanyang motor 219 Motor pole last 220 For motors with different powers, the starting current is a multiple of the rated current 221 How big a motor can a 630kva transformer start directly? 222 motor soft start 223 motor power, speed ratio selection? 224 What is the reason why the single-phase motor burns out several times even though the motor current does not exceed the limit? 225 Frequency conversion current is greater than the rated current of the motor? Is this normal? 226 Three-phase asynchronous motor three-phase current unbalance 227 Selection of motor pole number 228 What is the difference between variable frequency motor and industrial frequency motor? 229 Motor current signal display problem 230 Motor current fluctuation problem 231 Under what circumstances can the motor insulation of 6000 volts be low enough to start the 232 generator for motor operation? * * What is the specified time limit? 233 Can the motor power cable be laid together with the process pipeline (water pipeline)? 234 What is the function of the generator slip ring? 235 The difference between generator demagnetization, oscillation and out-of-step 236 Are there any issues related to the turbine generator shaking insulation? 237 Principles and instructions for use of stepper motors 238 When the motor of transmission machinery uses a frequency converter, the current, motor output power, and output torque change. 239 Why is the motor so high temperature before it exceeds the rated current? 240 Why does the generator speed not change, but the load increases when the load is increased? 241 The motor insulation is low, what should I do? urgent! Can the 242 motor be flushed with water? 243 The difference between multi-speed motor 2443kw motor starting with protection and without protection 245 Does the overcurrent protection of general motors use inverse time limit or definite time limit? 246 How to switch motor/generator 247 Will starting the high-voltage motor cause the low-voltage motor to trip? 248 Motor failure 249 The motor cannot start 250 Protection of the generator 251 The main steam valve of the generator is closed 252 Let’s discuss, about Star and delta connection of the motor 253 Generator 254 Variable frequency control motor for water pump problem 255 Weird high-voltage motor trip 256 How to adjust the motor speed 257 Excitation problem of synchronous motor 258 Voltage resistance test of the motor! 259 What is the difference between the working principles of single-phase motors and three-phase motors? 260 The stator temperature of the main fan motor is extremely high. 261 The disassembly and assembly sequence of explosion-proof motors? 262 Low-voltage motor protection 263 Motor power calculation 264 Replace the JS114-4 "asynchronous motor" with a new energy-saving motor 265 The motor is burned 266 The problem of the wind turbine not turning 267 Please tell me about the advantages and disadvantages of the high-voltage motor inductor step-down start 268 What is the reason for the high current of the delivery pump variable frequency motor below 20HZ? There are 6 280KW motors in Project 269. Please tell me the advantages and disadvantages of starting with high voltage or low voltage! 270 Sewage pump motor 271 Ask about the motor of the centrifuge 272 Questions about the frequency converter controlling the motor 273 The impact of starting the high-voltage motor 274 High temperature of the motor bearing 275 Asking the industrial control brothers about the voltage test of the motor 276 The power control principle of motor speed regulation 277 The difference between variable frequency motor and soft start motor 278 The set of motors using soft starters is rated 279 Variable frequency motor 280 Motor bearing damage 281 Motor bearings 2826 How to deal with the sudden increase in the bearing temperature of the KV motor? 283 Selection, use and troubleshooting of small wind turbines 284 Can the power 220KW Schneider soft starter drive a 0.8KW motor? 285 About the full-voltage start of high-voltage motors 286 A brief discussion on the grid-connected splitting system of generators 287 Parallel operation of generators 288 [Low-voltage motor intelligent protection controller] Who has used it? Come and discuss 289 Comparison between Xi'an Motor and Nanyang Motor 290 Anti-halation design of motor 291 SKF's introduction to motor bearing lubrication 292 Concept, measurement and calculation of motor temperature and temperature rise 293 How to connect generator stator temperature wiring 294 Explosion-proof motor standard 295 Where should the installation, wiring inspection and debugging of small boiler motors belong? 296 How to calculate the wires and switches according to the capacity of the motor? 297 Questions about the calculation of power consumption of centrifugal pump motors 298 For a 2000KW motor, what should be the normal operating current? What is its normal range? ? Is there any regulation on the matching relationship between 299 motor power and speed? 300 Operating procedures for skid-mounted natural gas and diesel generators 301 Secondary wiring of turbine generator sets 302 Selection of motors 3031 Carbon brushes for large motors with 10,000 kilowatts! 30410KV high-voltage motor can be used with variable frequency 305 Issues about indoor anti-corrosion motors 306 Motor tripping issues 307 Large high-voltage AC motor stator insulation voltage withstand test specifications 308 Who has researched high-voltage motors? 309 About ordinary motors connected to frequency converters 310 What should be paid attention to when doing generator no-load characteristic tests 311 Examples of standard calculation specifications for DC motor parameters 312 Little knowledge of stepper motors (basics) 313 Application of stepper motors in packaging machinery 314 Power control principle of motor speed regulation 315 Discussion on the causes of abnormal sound of hydraulic generator sets 316 Several issues in fault diagnosis of motors 317 Is it more reasonable to use high voltage or low voltage for 315KW motors? ? Is it more reasonable to use high voltage or low voltage for 318315KW motor? ? How many poles are represented by the 319 motor?