Why do we connect stop pushbuttons in series in a two - station motor control?

Q: What is the motor used for pumping water in domestic application? Why?

A: Depending on the size of pump, there can be either three phase induction motor or single phase…

Q: Why is the reason of connecting in series a normally open contact of an overload relay and an…

A: Overload is the condition when the motor start drawing excessive current in compare to its rated…

Q: Why are circulating currents detrimental to good motor operation?

A: When motor are operated on DC drives , there are two types of motor operation we can choose which…

Q: Explain (i) control relay and (ii) Thermal overload relay?

A: Control relay A control relay is an electromagnetic device that is most commonly used in protection…

Q: 3- explain the regenerative braking?

A: Note: We are authorized to answer the first question since the exact one wasn’t specified. Please…

Q: Differentiate between the Manual over Magnetic DC Motor Controller

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Q: what device is generally used to disconnect the start windings of a split phase motor for open type…

A: In this question we need to answer which device is generally used to disconnect the start windings…

Q: what is the laddered circuit of forward-reversed motor control?

A: Ladder diagrams are schematics used to describe industrial control logical systems. Since they…

Q: Is the closed loop control system shown in the figure stable?

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Q: Briefly describe the regenerative braking method of a DC motor. Where it is used? For the toolbar,…

A: The detailed answer is solved below according to the given parameters and instructions in the…

Q: 2. When multiple start stop pushbuttons are required the stop buttons are connected in and the start…

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Q: A) Explain in details main used methods of electric braking of the DC shunt motor; draw the…

A: Since you have asked multiple questions in a single request, we will be answering only the 1st…

Q: 1.a. Which one of the following statements is true about a dual-voltage capacitor-start motor? A.…

A: Dual- voltage capacitor start motor : Dual voltage capacitor-start motors are only possible, when…

Q: For what purpose was the asynchronous motor idle test performed? Please explain.

A: Need to find For what purpose was the asynchronous motor idle test performed?

Q: what must be done to prevent excessive motor current?

A: To prevent the excessive motor current various protection schemes are applied for different motor.…

Q: 16. What voltage may be applied to 230/460- volt motor if used with a part winding? Why?

A: What voltage may be applied to 230/460V motor if used with s part winding? Why?

Q: When calculating motors, why do we use the NEC table amperage instead of the nameplate amperage?

A: In the table of National electrical code (NEC) full load motor current higher to the motor's name…

Q: Explain the working principle of Forward-Reverse, Start-Stop and Jog Motor control with your unique…

A: Motor-  A device which converts electrical energy into mechanical energy. The speed of motor is…

Q: What is the function of the double contact pushbutton in a Start-Stop-Jog motor control circuit?

A: Double contact pushbutton is used in the Start-Stop-Jog motor control circuit, its functions are as…

Q: from the rewind shop and was installed on the previous shift. The motor seemed to operate properly…

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Q: What  is plugging type braking?

A: Braking is of two type, one is for mechanical system and other is for electrical system. Hence,…

Q: What is the work of the Automatic transmission control system?

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Q: Define protective relay? Explain with appropriate diagram.

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Q: How many poles are required on motor starters for the following motors:(a)240-volt, single-phase…

A: Let, Synchronous speed of single phase induction motor is 1800 rpm. Synchronous speed of three…

Q: Name the three drive configurations that a gear set can transfer torque?

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Q: Where can you find the low/high voltage connection diagram of a motor?

A: As per the NEMA, the low/high voltage connection of the motor can be classified by the number of…

Q: Why do you think some motor control circuit utilizes single voltage sources for control and power…

A: Types of Motor control based on power supply  Three power supply  Two wire supply  Types of…

Q: Using the time limit overload or the dashpot overload relay, how are the following achieved:…

A: Using the time limit overload or the dashpot overload relay, the tripping current adjustments are…

Q: Dual- voltage rated pump motors are rated!?

A: There are so many AC motor pump is rated for dual Voltage. It means that the motor can able to run…

Q: For a start-stop push button control circuit that has been reconnected so that the start button is…

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Q: Explain the working principle of the 3-phase motor control with forward-reverse-stop pushbuttons.…

A: To explain the working principle of the 3-phase motor control with forward-reverse-stop pushbuttons.

Q: 3. Why must the field winding left connected across the supply during the braking period?

A: As we know, E=kϕω E is constant at the start of breaking. ω∝1ϕ

Q: Differentiate the used of Stepper motor over Servo Motor as applied for DC Source.

A: A stepper motor is to boot a digitally stepped motor, it takes a sequence of pulses to form it take…

Q: What causes the overload of a starter to open and disable the power circuit?

A: The various causes by which the overload of a starter to open and disable the power circuit is as…

Q: Write a ladder program for two-motor control program, so that when the ignition switch is closed,…

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Q: Worn armature bearing can result in higher than normal starter cranking current draw ? True or false

A: The above statement is true.

Q: explain open loop control system and closed loop control system

A: Open loop control system : A system in which there no influence of output on the input of system is…

Q: 1. If suddenly remove the load for the open loop control system, what will happen? please describe…

A: Open-loop control system: It is a type of control system in which input is independent of the…

Q: Assume the motor is running. What happens when the stop button is pressed and then the start button…

A: While the motor is running and if the stop and start button are pressed alternatively. Their effect…

Q: Why do we use pushbutton type switches for controlling the motor circuit?

A: Push buttons are momentary contacts available as either normally open(NO) or normally closed(NC)…

Q: List 3 hazards when constructing (working) with a homemade D.C motor and how it can be managed?

A: List of some hazards when constructing (working) with a homemade D.C motor: Do not use in a…

Q: our Answers may be presented through Discussions, Drawings/Figures/Diagrams, Reference to NEC/PEC…

A: Given data, The conductor is connected to the three motors. Motor 1=50 hp Motor 2 = 40hp Motor 3 =…

Q: When selecting motor overload protection devices from where is the full load ampere rating taken?

A: This question is from "Electrical Machine". Under which we are going to study about the overload…

Q: Which type of VSD is suitable for regenerative braking?

A: For practical Applications, it can be assumed that 15% to 20% of energy dissipated during the…

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.