ABB High Voltage AC Motor

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Q:How to control an AC motor.?
You need a gear motor of some sort, preferably a worm drive one, or one with a brake, You don't need the second one, it needs an external gearbox, and with one can probably lift a couple hundred pounds. I'd get one a bit bigger than the first one, which has a worm drive on it, or add a worm drive to that one. To control it, you would use a pair of relays with 10A 120V contacts, and coils appropriate to your control circuit, likely 12V. One relay would power the motor CW, the other CCW, by each applying power to the lead on either side of the run capacitor. For the bigger motor, you would use a 3 phase (preferable interlocking) contactor set. One set of contacts on each section would engage power to the motor, the other two would apply the correct polarity to the start circuit (in relation to the run windings) for the intended direction.
Q:Can a DC series motor operated on an AC supply?
An universal AC/DC motor is series wound, so a series DC motor will probably run on AC, but if it was designed specifically as a DC motor rather than a universal, performance might suffer.
Q:AC motor not starting properly?
may be due to oldage so clean and do well lubricants
Q:How do you properly connect the motor terminals to the associated conductor wires?
Its common practice in the US to use wire nuts in motor terminal boxes. Its very unfortunate that they don't contain suitable terminals as the case in European motors, in fact wire nuts are not considered appropriate connections even in domestic applications in Europe. The problem with wire nuts, especially in motors that vibrate, is they offer little mechanical strength. My advise would be to find screw type connectors. They are often refered to as Euro connectors in companies that sell them such as Allied or Grainger. Many parts of East Asia also have motors without terminals and here they use crimp terminals and bolt them together followed by a procedure of taping. You may find this in larger motors in the US
Q:How we can estimate the HP of an AC induction traction motor?
Revised later to correct my own confused reading of the question. It is not clear what the given values represent. Is the current a measured value under operating conditions or a value given as the rated current? You can not accurately calculate the rated or actual output power without the efficiency and power factor. You can not even estimate the actual output power without knowing the rated output power. The power factor at rated load will be similar to efficiency estimated for various power ranges in another answer. At less than rated load, power factor and efficiency are less that they are at full load with zero efficiency and nearly zero power factor at no load. If the given current is the rated current, the input is 1500 X 200 X 1.73 = 519 KVA. If you estimate the efficiency and power factor at 0.95 and 0.85, 519 X .94 X .83 = 419 kW output or 419/0.746 = 562 Hp. The best way to estimate rated power from rated current is to look in motor catalogs and match up the current rating with a listing for a similar motor. Catalog data is also useful for accurate estimation of actual load power from actual load current. Re further details: The above paragraph gives an estimate calculation based on continuous ratings for voltage and amps based on 3-phase RMS values. If you know standard power ratings for the type of motor, estimate based on the standard power value nearest to the calculation results; for example 500, 550 or 600 Hp.
Q:Is the output voltage from a brushless motor AC or DC?
Motors don't output voltage, but rather mechanical power. You apparently mean: Is the output voltage from a brushless motor **controller** AC or DC? I also assume ESC means Electronic Speed Control. Brushless motors are indeed typically called DC Brushless Motors because they *run* from DC, not AC. All motors must have multiple poles or windings and the field must some how switch from winding to winding so as to cause a rotating magnetic field that pulls the rotor around. This switching process is called commutation. Brushless motors are commutated electronically rather than mechanically like the older type with the segmented contacts on the armature and stationary carbon brushes. DC brushless motors are most commonly three phase which means there are three windings. The current is switched in these windings in the very common three phase sequence and current does go in both directions. There are indeed AC signals in the windings. PWM or Switching techniques are used to actually control the amount of current and therefore torque to achieve speed control. The small muffin fans actually use a two phase system similar to shaded pole motors, or even a one phase pulse-like system and rely on the motor stopping in a certain position so it gets a push from the single pole and coasts until it gets around again. Sooo... DC Brushless motors do indeed run on AC... or DC as you wish too look at it.
Q:How can i slow the RPM on an AC motor?
Wow Juan, let me tell you something, I have no clue how in HELL you got this job if you cannot solve this simple problem. First of all, I would recommend you get a different motor, because the reduction that you would need for this would be massive. I'm not sure if this is possible. I'm sure you know of gear ratios? Well the same thing applies with timing belts and their sprockets. If you have a small sprocket on the motor and then a larger sprocket on the other side, then the larger sprocket turns slower. So you would essentially do that, or you could do multiple reductions. That would be to say that if you put a small sprocket on the motor, and then put a large sprocket on a shaft, then you can put another small sprocket on the shaft and wrap and belt it with another large sprocket. This is called compound gearing. So using that method, you can reduce the speed of the motor. Now, considering this is a pig and it's roasting, I'm thinking that the RPM should be somewhere about 6-10. So the gear ratio should be about 345. Good luck.
Q:How to control the speed of a Electric AC motor?
A light dimmer might work with a shaded pole motor driving a fan.
Q:Why is AC motor control more difficult than DC?
The mechanical characteristics of AC motor (curve) as 1 tilt of the toilet, the mechanical characteristics of "soft", and "inflection point" (or there is a negative resistance region), the operating condition of the motor once in the negative resistance region will lose control".
Q:I have a 115 volt motor and I need a dimmer switch to control the speed. Which kind of dimmer should I get?
Use one that is rated for motor use. Usually you will see the phrase fan motor. But you need the max current drawn by the motor, and the dimmer should be rated for that current or higher. The one in the reference is rated for motors up to 1.5 amps. That is about 180 watts. If it is always going to be running at the reduced speed, you may be better off with a transformer or a power resistor. For example, a stepdown transformer with an output of 12 volts at 5 amps can be wired to provide 115–12 = 103 volts at 5 amps. .

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