Can you help by answering this question?

WHAT IS over flexing?

6 views
by
Describe the following errors and their compensation: (i) Phase error (ii) Speed error

1 Answer

0 votes
by

(I) Phase error  

1. In the phase error the phase difference angle between ∅ & ∅ is kept by using the shading band/ring 

2. If the design and location of Shading band/ring is not proper then the phase difference angle between ∅ & ∅ will not be exact , So that, the speed of the aluminum disc may change 

3. This type of error is called as a phase angle error 

Compensation  

• To minimize the phase error the design quality and location of shading band/ring should be proper 


(II) Speed error 

Sometimes speed of the disc is more or less than the rated speed due to wrong positioning of braking magnet. Hence meter gives error. 

Compensation –  

Proper setting up of brake magnet. By changing the position of the brake magnet speed of the rotating disc can be controlled. 

Related questions

2 answers 3 views

State the meaning of creeping error in 1 phase energy meter.

asked Sep 6, 2018 by Shimroz123
1 answer 131 views

List the different errors in wattmeter & explain compensation for it.

asked Sep 5, 2018 by Shimroz123
1 answer 15 views

List any four errors in induction type energy meter. Give method of compensation for each.

asked Sep 5, 2018 by Shimroz123
2 answers 57 views

speed control methods of three phase induction motor?

asked Aug 9, 2017 in Electrical Machine by Zeeshan
1 answer 52 views

Explain following techniques related to energy conservation in transmission and distribution system. (i) By balancing phase currents (ii) Variable technical losses (I2R losses).

asked Sep 22, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 11 views

If stability error for step input and speed of response be the criteria for design, what controller would you recommend (1) P controller (2) PD controller (3) PI controller (4) PID controller

asked Apr 29, 2018 in Control System by Shimroz123
1 answer 8 views

What is the percentage error when 3 resistors with ratings 100 Ω at 5%, 150 Ω at 6% and 250 Ω at 8% respectively, are connected in series? A) 6.33% B) 6.80% C) 19% D) None of these

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
1 answer 8 views

State the use of:- (i) Clip-on-ammeter (ii) Phase sequence indicator

asked Sep 6, 2018 by Shimroz123
1 answer 135 views

Shunt compensation in an EHV line is used to (A) Improve stability. (B) Improve the voltage profile. (C) Reduce the fault level. (D) Substitute for synchronous phase modifier.

asked May 8, 2018 in Power system by Shimroz123
1 answer 16 views

Load compensation in power systems is a process to :  (A) Maintain better voltage profile (B) Increase short circuit capacity of the system (C) Generate required harmonics for loads like arc furnaces (D) Compensate for the line reactance

asked Apr 29, 2018 in Power system by Shimroz123
1 answer 27 views

Series capacitive compensation in EHV transmission line is used to

asked Apr 29, 2018 in Power system by Shimroz123
1 answer 14 views

Define the following terms and state their units: (i) Luminous intensity, (ii) Luminous flux

asked Sep 22, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 33 views

What is the channel capacity of a noisy channel with conditional probability of error p = 1/2? A) 0 B) 1 C) Infinity D) 2  

asked Jun 18, 2018 in Electronics Engineering by Shimroz123
1 answer 11 views

True value has been 50 whereas measured value is 40 then the percentage error in the reading will be ______.  (A) 20% (B) 40% (C) 50% (D) 30%

asked May 8, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 23 views

What are the types of error?

asked May 6, 2018 in Digital Instrumentation by Shimroz123
1 answer 31 views

How can the steady-state error in a system be reduced?  (1) By decreasing the type of system (2) By increasing system gain (3) By decreasing the static error constant (4) By increasing the input

asked May 1, 2018 in Control System by Shimroz123
1 answer 14 views

The steady state error of the system can be minimized by

asked Apr 26, 2018 in Control System by Shimroz123
1 answer 308 views

In order to regulate steady state error to zero, in a negative feedback control system, one employs

asked May 1, 2018 in Control System by Shimroz123
1 answer 46 views

What is measurement error ?

asked Jan 7, 2018 in Digital Instrumentation by Quiz
1 answer 38 views

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque  (1) Decreases (2) Increases (3) Remains constant (4) None of the above

asked May 1, 2018 in Electrical Machine by Shimroz123
1 answer 56 views

The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a firing delay angle, α and flux, Φ (A) directly proportional to α and Φ (B) inversely proportional to α and Φ (C) directly proportional to α and inversely proportional to Φ (D) directly proportional to Φ and inversely proportional to α

asked Apr 28, 2018 in Power Electronic Controlled Drives by Shimroz123
1 answer 18 views

The speed of a 2-pole, 3-phase stepper motor operated by 1200 pulses/min (A) 100 rpm (B) 200 rpm (C) 400 rpm (D) 800 rpm

asked Apr 28, 2018 in Electrical Machine by Shimroz123
0 answers 21 views

Describe the gate circuit for a single phase full converter.

asked Mar 11, 2018 in Power Electronics by Quiz
1 answer 19 views

Describe the following energy conservation methods of lighting system. i) By replacing lamp sources ii) Using light control gears.

asked Sep 22, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 55 views

Describe the following energy conservation methods of electrical motor. i) By motor survey ii) By matching loads with motor rating

asked Sep 22, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 4 views

Define following term: (i) Precision (ii) Drift (iii) Static error (iv) Dead zone

asked Sep 13, 2018 by Shimroz123
2 answers 11 views

Describe with neat diagram phase sequence indicator.

asked Sep 6, 2018 by Shimroz123
1 answer 20 views

With the help of neat diagrams,explain the following methods of speed control in DC series motor. i) Field diverter method. ii) Armature diverter method.

asked Sep 18, 2018 by Shimroz123
1 answer 32 views

An electric motor in which both stator field and rotor rotates with same speed is called?

asked Mar 18, 2018 in Synchronous machine by Shimroz123
1 answer 8 views

State the effects of errors in dynamometer type wattmeter due to i) pc- inductance ii) pc- capacitance iii) mutual inductance iv) Connection.

asked Sep 6, 2018 by Shimroz123
1 answer 14 views

Why does the speed of a DC shunt motor decrease as the load increases?

asked Jul 5 in DC motor by Shimroz123
1 answer 33 views

A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be

asked May 8, 2018 in Electrical Machine by Shimroz123
1 answer 72 views

The number of cycles in which a high speed circuit breaker can complete its operation is  (A) 3 to 8 (B) 10 to 18 (C) 20 to 30 (D) 40 to 50

asked May 8, 2018 in Switchgear And Protection by Shimroz123
2 answers 34 views

The fall in speed of a dc generator due to increase in load can be corrected by  (1) cooling the armature.. (2) increasing the excitation. (3) reducing the load voltage. (4) increasing the input to the prime mover

asked May 1, 2018 in Electrical Machine by Shimroz123
1 answer 7 views

The unit of speed regulation of a governor is :  (A) Hz (B) Hz/MW (C) Hz/MVA (D) rpm/MVAR

asked Apr 29, 2018 in Power system by Shimroz123
1 answer 21 views

The ADC having highest conversion speed is (A) Dual-slope ADC (B) Successive approximation ADC (C) Flash ADC (D) Servo ADC

asked Apr 28, 2018 in Digital Instrumentation by Shimroz123
1 answer 10 views

Under constant load conditions, the speed of a d.c. motor is affected by?

asked Mar 26, 2018 in DC motor by Shimroz123
1 answer 13 views

The speed of a D.C. motor can be controlled by varying  1. Its flux per pole 2. Resistance of armature circuit 3. Applied voltage 4. All of the above

asked Mar 20, 2018 in Electrical Machine by Shimroz123

Welcome to electronics2electrical.com here you can ask questions related to electrical, electronics, mechanical, telecommunication, instrumentation, computer, mathematics, physics etc.
Be respectful to all the members. Do not copy and paste the answers from other websites which have copyright content. While asking question give full details about it.

Categories

Most popular tags

power motor dc circuit transformer voltage current used system phase resistance factor synchronous load ac energy induction electric generator series frequency between speed capacitor use electrical meter line difference control type mosfet transmission magnetic plant high single instrument bjt unit source advantages function diode and machine winding field define torque parallel amplifier supply shunt thyristor motors electricity arduino maximum time relay armature problem value on transformers types coil diagram state flow ratio material three formula starting direction theorem method emf operating efficiency digital wave microprocessor test instruments inductance loss measure operation connected signal low applications effect single-phase network temperature working constant losses different law wattmeter measuring compare controlled breaker drive device logic rc full switch flux wire resistivity disadvantages free of materials machines angle force converter conductor transistor gain open protection scr core measurement number bridge principle generators reactance circuits negative the friction iron loop short pole battery conservation steam resistors hysteresis computer using analog lines secondary station gate a rectifier inverter linear induced relays nuclear capacitance basic characteristics design direct work rotor electronics ammeter forces diesel damping rlc connection factors capacitors minimum insulation moving regulation running self systems air fault range main stability quality starter igbt eddy alternator ideal rl average 3-phase plants arc thermal error fuzzy biasing dielectric pressure balanced superposition errors copper rotation feedback impedance measured electronic electrons charge inductive transfer explain start off back curve over solar is three-phase tariff locomotive peak bias zener engineering commutator surge conductors rating universal potentiometer density permanent mechanical transducer capacity memory adc excitation two fuse pure harmonics application semiconductor inductor internal pmmc reaction welding resonance traction permeability breakers rms designed electromagnetic si generation brushes switching capacitive shaded rate 1 distribution resistor methods delta star oscillator reluctance simplification algebra 8085 boolean weston dynamometer insulating strength installation definition fuel heating earth units
...