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introduction：Yaskawa frequency converterAmazing performance、versatile、Easy to use and maintain、With user self-programming function，In any respect, it has a breakthrough improvement with the previous small frequency converter，It will raise the grade of all small machines。
2018-11-05 Reading quantity 322
introduction：The reason why the inverter motor is hot is： 1、High order harmonics cause the efficiency and power factor of motor to deteriorate，Motor loss increase。Because the ordinary motor is designed and manufactured according to sine wave power supply，When there are higher order harmonics flowing through the motor winding，Copper loss increase，And cause additional loss，Thus, the winding heats up。Inverter transmission compared with power frequency power transmission，Current increase10%，Temperature rise increases about20%。
2018-11-02 Reading quantity 237
introduction：Compare with DC speed control system，Dc motor is more efficient than AC motor、High power factor，The efficiency of the digital DC governor is comparable to that of the frequency conversion governor，Even the digital DC governor is slightly more efficient than the frequency conversion governor。therefore，It is claimed that the use of AC asynchronous motors and variable frequency governors saves electricity than the use of DC motors and DC governors，Theoretical and practical proof，This is not true。
2018-11-01 Reading quantity 448
introduction：Follow the small series together to learn about the gap analysis of the circuit breaker！ Determine the electrical clearance of electrical products，It must be based on the insulation of the low-voltage system，The insulation fit is built upon the transient overvoltage being limited to the specified impulse withstand voltage，The instantaneous overvoltage generated by the appliances or equipment in the system must also be lower than the impulse voltage specified by the power supply system。therefore： 1.The rated insulation voltage of the appliance should be≥Rated voltage of the power supply system 2.The rated impulse withstand voltage of the appliance should be≥Rated impulse withstand voltage of the power supply system 3.Transient overvoltage caused by electrical appliances≤Rated impulse withstand voltage of the power supply system。
2018-11-01 Reading quantity 533
introduction：Three-phase induction motor(Triple-phase asynchronous motor)Its by simultaneous access380VThree-phase AC power supply（Phase difference120The degree of）A type of electric motor supplied with electricity，Because the rotor and stator of the three-phase asynchronous motor rotate the magnetic field in the same direction、Different speed into rotation，There is a slip，So its called three-phase asynchronous motor。
2018-11-01 Reading quantity 371
introduction：Asynchronous motor，Also known as“Induction motor”，The rotor is placed in a rotating magnetic field，Under the action of a rotating magnetic field，Get a moment of rotation，Thus the rotor rotates the device。A rotor is a rotating conductor，They are usually squirrel-cage shaped。By electrical engineer Nicola·Tesla1887Inventions of the Year。The concept of induction motor is introduced、contriver、Working principle、Basic structure、Working mode、Braking mode、Asynchronous feature、Specifications and troubleshooting。
2018-10-31 Reading quantity 255
introduction：According to Xiaobian understanding，Cylinder The cylinder is made up of a cylinder、End cover、piston、Piston rod and seal components, etc，Let me talk a little bit more about the cylindersStructure and function are introduced
2018-10-31 Reading quantity 228
introduction：Permanent magnet synchronous motorBoth induction motor and brushless DC machine features。Same as brushless DC motor，There are permanent magnets on the rotor，And the stator has a winding。merely，The stator structure with winding generates sinusoidal flux density in the motor air gap，This is similar to induction motors。Under the same rating，The power density of permanent magnet synchronous motor is higher than that of induction motor，Because it does not consume stator power to generate a magnetic field。Present Day，Permanent magnet synchronous motors are not only designed to be more powerful，It also reduces weight and moment of inertia。
2018-10-30 Reading quantity 211
introduction：SettingsPLCControl system7steps
2018-10-29 Reading quantity 253
introduction：ΔI/IN=ΔI/(Us/Rd) ShizhongRdIs the total resistance of armature circuit。Substituted into the previous various drive control methodsΔIIn expression，cancellationUs，calculable： For unipolar control
2018-10-29 Reading quantity 237
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