0
Motors running backwards:
A DC motor wired backwards or magnetic field reversed.
A 3 phase AC motor with 2 phases reversed
A single phase motor will run either way unless it is 'persuaded' by means of a shaded pole or other method to rotate in a particular direction.
Add your answer:
Earn +20 pts
What would cause a 3 phase motor to switching rotational direction?
I'm not--NOT--an electrician, so take this with a grain of salt (or a milli-amp). But, it seems to me that maybe the wiring on the phases is backwards. Maybe switching two of the main wires will reverse the direction. Oh, and stand back when you plug it in.
What size generator do you need to move a 30 hp electric motor?
A 5 kW generator would turn it over but if the full 30 hp of mechanical power is needed, that would require about 30 kW of electric power from the generator.
Will an electric shock cause a nosebleed?
I just gave myself an electric shock while TIG welding, and got a nosebleed, so it would appear the answer is yes.
How can you determine if an electric motor is 50HZ or 60HZ if there is no name plate?
One way would be to hook it up to a supply (by itself, with no load) and measure the speed with a contact tachometer. If your supply is 60Hz, and the motor speed corresponded to one of the standard motor speeds, it would be a pretty safe bet you had a 60Hz motor. If the speed was about 20% faster than a standard speed, the motor is probably a 50Hz motor. Or 20% slower if you were running a 60Hz motor on 50Hz For instance, a 1750 RPM 50Hz motor would spin at about 2100 RPM if you ran it on 60Hz.
Why windings of a direct current motor are made of copper?
Copper is the best base metal for conducting electricity. Gold and silver are better but too expensive. If you used a poorer metal you would lose more power and it would also generate more heat which in a motor would be quite a lot. More heat would then cause more resistance which would cause more heat.
Why would a 110 motor runs slowly backwards?
It depends on if the motor is an AC motor, or DC motor. DC motors only run backwards when the voltages get crossed between + and -.
Does an electric motor have different resistance than an electric heater?
Yes it would be unlikely an electric motor coincidentally exactly matched the resistance of an electric heater.
What would cause a ticking and dash lights diming flashiing the ticking is present even when the ignition is off?
look for a shorted electric motor like window motor. when the motor contacts fail they can cause the "ticking" and it drains the power constantly, even when the ignition is off.
How would you make an electric car?
You get lots of batteries and a huge, powerful electric motor
What happens if you connect a starter motor backwards?
By connect a starter motor backwards I assume you mean put the negative cable where the positive cable would go and then put the positive cable to the negative connection. In that case the starter motor should run backwards. That might be a handy thing to do if you are using a starter motor to power something else such as a winch or maybe a pump.
Where on a motor vehicle would brass be used?
Brass bushings inside the electric starter motor.
Would an electric motor start if its capacitor broke down?
No.
What would happen to an electric motor if the amount of current in the motor was reduced?
Depends on what sort of motor it was. If it was the sort you find in an ordinary electric drill, then it would slow down. But rememer, the only way you can reasonably reduce the current in to motor is to reduce the voltage in the supply. A motor takes what current it can, dependent on Ohm's Law. To reduce the current, reduce the voltage. But in a three-phase motor, the speed being dependent on the rotation of the phases, it would more or less stay the same. But this assumes it's not under load. A load would cause it to slow down.
What would cause an electric wheelchair to suddenly stop?
Hmmm.. Bad control switch, Faulty wiring, Battery failure, Drive motor failure, operator dead.
What type of bearing would be fitted to a fractional kW electric motor?
The type of bearing that would be fitted to a fractional kW electric motor will depend on the model and maker of the motor. Deep grove ball bearings are the most common bearings used.
What size hydraulic motor is needed to be equal to a 3 hp electric motor?
To determine the size of the hydraulic motor needed to be equal to a 3 hp electric motor, you would need to calculate the hydraulic motor's power output in horsepower. Hydraulic motors are generally less efficient than electric motors, so you may need a larger hydraulic motor to match the power output of a 3 hp electric motor. Consult the manufacturer's specifications and consider factors such as efficiency and operating conditions.
How much would it Cost to replace electric window motor?
The exact cost to replace an electric window motor varies slightly by the model of car. As of 2014, the average cost for this motor is between 35 and 55 dollars.
