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Why is DC motor wider than AC motor? High speed regulation accuracy? How do you know?
- The speed regulation of DC motor usually depends on changing the voltage at the two ends of the armature. The speed and voltage are basically linear, so the speed regulation accuracy is high. However, due to the brush limit, the DC power is generally not largeThe speed change of an AC motor depends on changing the pole number or changing the frequency, while the mechanical characteristic is related to the rotor resistance, armature current and so on. The ancient and lower precision, to achieve servo control should be introduced into the closed loop control system.s
What's the right electric motor for me?
- and you can use the search web line to openscroll === how to make an electric yarn carders
Is there currently a car that uses DC current Traction Motors, for the wheels, and a generator for power?
- The full hybrids that can move under electrical power alone (Toyota, Ford, Lexus and Nissan hybrids) use 3-phase AC motors. One of the reasons is that AC motors don't have commutators so they tend not to wear out as often as DC motors. These hybrids have inverters that can convert the hybrid battery's DC current to AC for use with the motors or vice versa when the motors are being used as generators during regenerative braking or being cranked by the gasoline engine to charge the battery. Railroads have been moving to AC traction in the past 10 years as well.. These days on the Class-I railroads the majority of 6-axle diesel-electric locomotives are AC, like the SD70ACE locomotives from Electromotive and the ES44AC Gevo from General Electric.s
What kind of motor are used in electric cars?
- The DIY electric car community has been active for some years now, There should be quite a few active sites by now. In the early days, DC motors were prevalent, now just as in the Locomotive field, AC has taken over. DC motors and PM AC often posses full torque at zero rpm. There were some designs that used a motor on each wheel, along the lines of Locomotive practice. These usually require the addition of wheel slip detection, however. A little like the traction control used on current autos.s
IS there a temp sensor in the ac / heater electrical system to the motor?
- typically a bad blower motor that has a dead spot on the armature that goes on when traveling down road or when it warms ups
Torque equation for AC synchronous motor and generator?
- Torque=Kt*I, where Kt is the torque constant and I is the current. It's that simple.s
Can a AC motor used as a exhaust fan generate electricity and how.?
- Hook up a multimeter to the plug and spin the fan. If it shows a voltage, you are producing energy. The motor may have diodes or a reverse power device to prevent a surge from being created by the motor, but if you spin it and check the wiring at certain points, you will discover where to connect your wires to produce power. I have seen generators become motors when the reverse power relays failed. It should be able to work the other way around.s
What are the reasons for initial inrush curent at start of an AC motor?
- The coils of an electric motor have inductive reactance but very little resistance. The coils initially act similar to a short circuit when the switch is closed and the motor shaft is stationary. Once the motor begins to rotate, the motor develops back EMF (voltage in reverse polarity to source voltage) which counters the source voltage, reducing the effective voltage across the motor coils, and reduces current flow. Back EMF is highest in a motor that is at full operating speed and under no mechanical load. When the motor is under mechanical load, back EMF is reduced until the motor is under full load, increasing the current to full load rating.s
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