Q:for example an AC shaded pole fan motor 1550 rpm, 120v, 1.2A, not sure if this is enough info.i need to know approximately how much volts does it require for it to start spinning slightly.and what kind of motor specs should i be looking for if i want one that starts spinning at a low voltage? with the motor's length be between 2-4 inches.

That is not something that you can find out without testing the motor. Even then the voltage will vary a lot with slight changes in what is being driven, the temperature etc. AC motors are not usually designed for operation more than about 10 percent above and below the design voltage. A shaded pole motor driving a fan will behave more predictably than other types of AC motors and loads, but it probably won't behave very well below about half of rated voltage. If you want a motor that will work predictably over a wide voltage range, you need a DC motor.

Q:An AC motor is supposed to be a constant power motor. Suppose it is running a constant torque load at a particular speed. Suppose now the voltage is reduced, which should cause it to settle down at a lower speed supplying the same torque as per the new torque speed characteristic. Consider the electrical side. Higher slip will cause more current to be drawn that too at higher pf, which should maintain the power justifying the above theory. But on the mechanical side the new output power Torque x speed is supposed to be lesser now as speed is less now. Could anyone explain this contradiction?

oh shoot, in accordance to the previous answerer, it particularly is under the hood on the firewall. it particularly is a discomfort interior the butt to alter. right here's a time saving tip which will ward off unneccessary curse words and random wrenches interior the process the windshield of the motor vehicle beside yours: do away with the cradle bolts that connect the decrease subframe to the physique. the two 15mm or 18mm yet have a jack under it so it would not fall too far. this would decrease the engine assembly adequate to do away with the blower motor. next, use a strap or ratcheting tow strap to drag the engine forward AFTER removing THE ENGINE MOUNTS in front of the engine. this would pull the motor forward and the jack can decrease it. after those 2 steps, the blower motor is gravy. with out those steps, you would be bleeding and cursing, certain, i've got been there!

Q:Want to run for display. Very slow variable control so people can see operation clearly. Similar to a treadmill circuit but much lower HP. Would like control like rheostat for demonstration. DC motor preferred with transformer. Trying to keep cost at a minimum for the museum.

or if there are any manufacturing plants near you, someone might be ripping one out [or reducing spares inventory] and you could get it free.

Q:what is deference between PMSM and AC Servo motor?

PMSM means permanet magnet synchronous machine. An AC servo motor could also use permanent magnets, but it doesn't have to.

Q:Which price is higher, AC motor or direct current motor? Which one has a longer service life?

Exactly, if it is of the same size, should be AC motor, low price, long service life, AC motor makes the rotor rotating by electromagnetic induction, relative power, and internal heat production is less than that of dc;

Q:A 3 phase, 2 hp, 480 volt AC motor online? (case/price doesn't matter)

pls visit www.electricity.uk for for knowing all bout engineering

Q:Dc I have motors, leds and such what can I power with ac

AC is used for power generation and distribution, many motors, lighting, appliances, furnaces, electric stove, dryers, and other high power items. DC is used by DC motors, LEDs, most low power electronics equipment, etc. In most cases AC power is converted to DC for these applications.

Q:Replacing fan motor on AC condenser?

There is no fan motor on the condensor. The fan is on the radiator. The other fan that also operates the heater is on the evaporator end.

Q:I used my ohm meter and find the pairs and number at random, 6-3, 5-2, 1-4, then I found my last 3 leads that showed continuity and number at random 7-8-9...then I wired the motor for 208 3ph as follows, 4-5-6- togethers,then 7-1 for line 1, then 8-2 to line 2, and 9-3 to line 3, the motor it is not grounded and the leads are not open, m' I missing something or the motor it's not good?

**** in it

Q:Why is DC motor speed regulating better than AC?

The magnetic flux can remain the same when the excitation voltage is constant at the time of DC speed regulation.