What are two methods of DC motor control?
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DC Motor Speed Control There are three main ways to achieve speed regulation in series DC motors–flux control, voltage control, and armature resistance control. In the flux control method, a rheostat (a type of variable resistor) is connected in series with the field windings.
How can a DC motor speed be controlled?
Thus, the speed of a DC motor can control in three ways:
- By varying the flux, and by varying the current through field winding.
- By varying the armature voltage, and the armature resistance.
- Through the supply voltage.
What are the two factors controlling the speed of a DC motor?
Factors Affecting The Speed Of A D.C. Motor
- The flux Φ
- The voltage across the armature.
- The applied voltage V.
What is speed control?
Definition of speed control : equipment designed to operate automatically under certain conditions to keep the speed of a railroad train within a predetermined rate.
What is the need of speed control in DC motor?
DC Motors plays an important role in energy conversion process. It is a machine which converts electrical energy into mechanical energy. In mechanical system, speed varies with number of task so speed control is necessary to do mechanical work in a proper way. It makes motor to operate easily.
How do you make a DC motor go forward and reverse?
When the switch lever is in the top position, the motor rotates forward. If your motor rotates in the opposite direction than you expected or wanted, simply reorient the switch in your hand so that lever is facing the bottom, and then toggle the lever to the top.
How does PWM control speed of DC motor?
As its name suggests, pulse width modulation speed control works by driving the motor with a series of “ON-OFF” pulses and varying the duty cycle, the fraction of time that the output voltage is “ON” compared to when it is “OFF”, of the pulses while keeping the frequency constant.
Why do we control speed of DC motor?
In mechanical system, speed varies with number of task so speed control is necessary to do mechanical work in a proper way. It makes motor to operate easily. Shunt motor is a special type of DC motor which runs at a constant speed. But using field and armature rheostat control method we can make it more versatile.
What is motor speed control?
Motor speed controllers are electronic devices that control motor speed. They take a signal for the needed speed and drive a motor to that speed. There are a variety of motor speed controllers available.