Siemens EX Series AC Motor

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Siemens EX Series AC Motor

Q:What are the advantages of a DC motor and an AC motor?: The DC motor consists of two parts, stator and rotor, in which there is a certain air gap. The main feature of the structure is that it has an armature with a commutator. The stator of a direct current motor consists of a machine base, a main magnetic pole, a reversing magnetic pole, a front and back end cover, and a brush rack. The main magnetic pole is the main component of the air gap magnetic field of the DC motor. It is composed of a permanent magnet or a laminated core with a DC exciting winding. The rotor of the DC motor armature, the commutator (also called commutator) and shaft components. The armature is composed of two parts: armature core and armature winding. The armature core is made up of silicon steel sheets, and the slots are evenly distributed at its outer circle, and the armature windings are embedded in these slots. A commutator is a mechanical rectifier. The sheet is made of a metal clip or plastic to form a whole after it is folded into a cylindrical shape. Each commutator piece is insulated from each other. The quality of commutator has a great influence on the operation reliability.

Q:What is the difference between AC motor speed and DC motor speed?: Because the exchange is easier to obtain, easier to transport, so at present we use most of the electric machinery is AC motor driven, AC motor applications more widely.

Q:When the induction motor is connected to supply from standstill and rotor starts running frequency of the induced current (slip frequency) in the rotor decreases from supply frequency towards zero. So this gives rise to a transformer situation where you have different primary and secondary frequencies which too varies with time. How is this possible? Will this create harmonics in the supply?: A good equipped and put in engine is as solid as new. Emphasize good... a expert pastime gets you high quality consequences with a assure. that is why solid mechanics get the vast funds. In different words... you get what you pay for. straightforward qualified mechanics are actually not consumer-friendly to locate, so verify the references. If the engine runs and has no problems, this is in all probability a solid purchase. till there have been greater advantageous intense overall performance adjustments, your insurance company does not care.

Q:i have a 95 nissan oickup and i cant get the blower motor to work it works if i straight wire it but as soon as i put back n and hook up nothing the ac compresser still works fine just the blower ant blowin could it be the blower motor resistor: Check fuses and relays.

Q:Do the split/spin rings rotate in an AC/DC motor. if yes, how so?: When the armature rotatesin the magnetic field , during the first 180 degrees rotation the induced current will be in one direction, and in the next half cycle the current will be in the opposite direction. ie. the proper AC will b the output, if the induced current is taken from thje armature through a pair of slip rings (full). Instead, if the current is taken from the rmature with the help of a pair of split rings (Half rings), what ever be the changes taken place in the armature will be nullified and the external current will be only in one direction. In short, slip rings gives us Bi- directional current and the Split rings , unidirectional current.

Q:The difference between a variable frequency motor and an ordinary AC motor: Due to the variable frequency motor under high frequency magnetic field, so the insulation level than ordinary motor, the principle is not ordinary motor with inverter driven, but in practice, in order to save money on many occasions with the need to speed motor to replace the ordinary motor, but ordinary motor speed accuracy is not high, energy transformation in the wind the pump in the often do. When the frequency converter motor is replaced by a common motor, the carrier frequency of the converter is as low as possible, so as to reduce the insulation damage of the high-frequency motor.

Q:I am converting my '79 VW rabbit from ac to non-ac.Where do I find the bracket that holds the alternator low on the block.: Check first with the auto-parts dept.at the dealership. They are fairly knowledgeable as to whether that is possible. Otherwise ask the service manager if that is possible to do. They may have a parts car out back of the dealership and you could get a used bracket there. Otherwise check out autosalvage yards for a 79 non ac car for the bracket.

Q:Hi I have a project to complete for my university. I amdesigning a PDA controlled vending machine. I have made a program on Labview for the PDA. Now when the user opens the software and stands infront of the vending machine he will scan for vending machines.whatever he wants he then selects that vending machine. the vending machine will have buttons corresponding to 3 slections. When the user selects the button,the microcontroller in the venidng machine will send a signal to a computer that will also be connected to themicrocontroller. If the person has enough balance the microcontrollerwill turn the correspoind motor on so it can vend the item. the motor is24 VAC. the microcontroller also needs to be connected to a bluetoothtranceiver. My question is that I am looking for the rightmicrocontroller that can be able to turn on one of the desired motors. Iwill connect each motor to the microcontroller though a relay. could youplease guide me how to od it.: Since you have the relay isolating the motor current from the controller, it's trivial. Just use a transistor or Darlington junction to amplify the control signal to a large enough level to drive the relay, and you're done.

Q:i mean in the sense of working ,construction wise ..........: dc motors are generally permanent magnet type and rotate at high speeds 4000 to 6000 rpm. In many cases, for automatic control, such high speeds are not required. So there will be a gear train to reduce the speed. This gear train might introduce avoidable errors such as due to backlash. In short a dc servomotor is a geared dc motor. there are however torque motors which have very low inertia. These are also dc motors with special construction. Low inertia is essential for servo applications. In ac motors, stepper motor is popular. A variation of this is the ac servomotor, which has fairly low speed. Otherwise, speed is in the range of 1500rpm to 3000 rpm. Changing the speed of an ac motor is no joke. One has to provide adequate voltage, but lower the frequency! You cannot control speed well by reducing the voltage as torque decreases substantially.

Q:Can a transfer function be derived from AC Motor? Do you have any idea to solve it?: Yes. When you switch the power on it takes a certain time for the motor to accelerate. The shaft inertia is an integration time constant, which levels off after a while, and becomes a first-order TF. The time constant of the winding can be disregarded, i.e., assumed small, relative to the inertia TC, but it also is a first-order TF, with an estimated TC of 0.1 sec. Then, there is a viscous friction TC, which can also be disregarded, unless some sort of braking is involved. Therefore, in short: rpm (s) / power-in (s) = 1 / 1 + s T s: Laplace operator T: shaft inertia time constant, in time units, = moment-of-inertia / nominal (nameplate) power The moment of inertia must include the motor shaft PLUS the inertia of the load driven by it. To determine the inertia, you?ll have to do a test, measuring the acceleration under a certain force. .

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