# Quick Answer: How Can You Reduce The Speed Of A DC Motor?

## How do you reduce motor speed?

So, if you want to decrease speed, decrease voltage.

If you want to decrease torque, decrease current.

If you increase torque (say by putting a brake on the motor), you are increasing motor torque.

But if you don’t change the supply of electrical power, then the mechanical power also won’t change..

## What are the factors that affect the speed of a DC motor?

Factors Affecting Motor PerformanceVoltage of Power Supply.Type of Power Supply.Winding Specifications.Environmental Temperature.Type of Magnet.Flux Yoke.Phase.

## What is the speed of dc motor?

DC controls adjust speed by varying the voltage sent to the motor (this differs from AC motor controls which adjust the line frequency to the motor). Typical no load or synchronous speeds for an AC fractional horsepower motor are 1800 or 3600 rpm, and 1000-5000 rpm for DC fractional hp motors.

## How do you calculate the speed of a DC motor?

Z = total no. conductors in armature. Hence, speed of a DC motor is directly proportional to emf of rotation (E) and inversely proportional to flux per pole (φ).

## Can you slow down an AC motor?

Slowing down a single phase AC motor can be complicated and expensive. They are usually built to be run at a certain speed and anything else would be tricking it to do something it wasn’t meant to. Simply slowing it down may cause it to overheat with reduced mechanical self-cooling.

## Can you control the speed of a single phase motor?

The two primary ways to control the speed of a single-phase AC motor is to either change the frequency of the line voltage the motor sees or by changing the voltage seen by the motor, thereby changing the rotational speed of the motor.

## How do you slow down dc motor speed?

If you want to go really slow, the resistor method will probably cause the motor to stall way before you reach your desired RPM. Using PWM ensures you get pulses of full torque, which allows you to drive the motor to really slow speeds. Yes, using resistors were the first method of controlling motor speed.

## How do you control the speed of a DC machine?

Thus, the speed of a DC motor can be controlled in three ways:By varying the supply voltage.By varying the flux, and by varying the current through the field winding.By varying the armature voltage, and by varying the armature resistance.

## How long can a DC motor run continuously?

You should anticipate, given proper attendance, that the motor can run continuously for the life of its brushes, which should be in the range of six months to a year. Presuming that the motor is too small to have its brushes changed by a trained electrician while running.

## How do you slow down a 12 volt fan motor?

Get a three 1.8 ohm 2 watt resistors, connect them in parallel and put them in series with your fan (put them in the air stream of the fan to help cool them). That should slow your fan down and reduce the load.

## How can we increase the speed of induction motor?

The speed control of three phase induction motor from stator side are further classified as :V / f control or frequency control.Changing the number of stator poles.Controlling supply voltage.Adding rheostat in the stator circuit.Oct 26, 2020

## Why is it necessary to control the speed of a 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.