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Q: Why speed of ac servomotor is not measured with tachometer?
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Working of AC tachometer?

A ac tach usually works off the AC signal of the alternator on a bus or truck. The alternator produces AC power that is rectified to make DC current to run the car, truck or bus. There is a TACH terminal or in North American buses more than 10 years old it is called a stator tap. The AC voltage changes speed (frequency) with the engine and the Tachometer reads that as a signal Early or inexpensive ones are actually run on the AC current.


What is the difference between an AC servomotor and a DC servomotor?

With a DC motor, power is supplied from a controller and transmitted to the motor windings via brushes and a commutator using pulse width modulation. This requires that the controller be adequate to handle the power/heat of the application and that the brushes and commutator are well maintained as they are wearing parts. With an AC servomotor, the controller only provides a low power signal to any size motor. Raw power to the motor is handled separately from the control circuit. The control signal is used to control the position of the motor which has internal position sensing capability. Power to the AC servo is always on.


What are the differences between ac servomotor and dc servomotors?

AC servomotors require an alternating current as a power source, meaning they need to be plugged into an outlet, while DC servomotors require a direct current as a power source, meaning they can be run off of battery power.


What is an ac voltmeter?

A: It is a regular DC voltmeter but the AC is rectified and the DC component is measured and displayed as AC VOLTS.


How does the voltage across a load is measured in a circuit with alternating current?

It's measured with an AC voltmeter.


Why can't AC be measured by a Volt Ohm Meter?

Typical VOMs can measure both AC and DC.


Which Two electrical quantities are measured in volts?

AC and DC


What can cause the car to stall when running the ac?

An engine usually has a higher idle speed when the ac is running. If the high speed idle does not operate then the ac will cause the engine to stall.


How do fix water from coming through floor vents?

assuming this is Home AC question - speed up the AC fan speed


If lights work on dashboard but gauges do not 1995 Eagle Vision AC speedometer tachometer is it fuse or chip?

Its the fuse and if not its the fuse Boxs. by the cluch or brake peddle.


What is the opposition of current flow measured in?

The opposition of current flow is measured in ohms. For DC circuits it is resistance and for AC circuits it is impedance.


Why ac drive convert ac voltage in dc?

It is done to control the speed of the motor.