A braking Resistor is a component used in DC-DC or AC-DC power supply circuits to reduce the output voltage. The use of a brakings resistor can reduce output current and save energy.

Resistors are electrical components that control or limit the flow of current. They can be found in many common appliances, such as light bulbs, stereo amplifiers, motors, computers, and even cars.

What is Braking Resistor?

A Brakings resistor is a resistor that controls the braking of a motor. A resistance of 1 Ohm means full braking power for the motor. For example, if we have connected a battery of 6 V (volts) with the motor to start the motor, if we apply 3 volts to the motor, we will not be able to start the motor. But if we increase the voltage to 4 volts, we will be able to start the motor. Similarly, if we apply 2 volts instead of 3 volts to the motor, we will not be able to start the motor. So we need to check whether the motor is able to withstand the voltage applied or not. We need to apply a resistance of 1 ohm to the motor so as to control the braking of the motor.

What is the role of a brake resistor in a motor?

In the motors, when current passes through the coil of a motor, a magnetic field is generated in the core. This magnetic field attracts the iron core attached to the shaft of the motor. Thus

We are going to look at the role of a brake resistor in a motor. We have discussed the role of the rotor. Now we are going to discuss the role of the stator. What do we mean by the stator? The stator is the set of coils that are wound around the core of a motor. The stator is connected to the coil windings of the rotor by brushes, which provide electric current.

These brushes can be connected to the stator by means a metal disk that rotates with the rotor, and a brush holder, which is metal support for the brushes. Now we are going to discuss the role of a brake resistor in a motor. What is the role of a brake resistor? A is used to slow down the rotation of the rotor, which slows the flow of current in the motor. This causes the brushes to wear out faster. When they stop making contact with the rotor, the motor stops working.

Working Principle of Braking Resistor

A resistor limits the current flow. This means that it restricts the amount of electricity that can pass through it. When we apply this working principle to the braking system of a car, we can see that it is possible to design a car brake resistor to slow down the rate at which the car decelerates. We call this resistor a ‘braking resistor‘.

The braking resistor reduces the rate of deceleration at the rear wheels by increasing the resistance of the circuit. By reducing the electrical flow, the resistor slows the car down. The consists of a resistance wire with small copper particles attached to the surface.

This is an important component of the motor as it helps in slowing down the flow of electricity.

Braking Resistor Circuit

An electric current can pass through the resistor and cause a certain amount of resistance. In order for the circuit to work properly, the resistance of the resistor must be within the required range.


There are several different types of VFDs. There are three types of braking resistors:

a. The brake resistance in the motor control circuit,

b. The brake resistance in the inverter of the motor,

c. The brake resistance in the power supply circuit

The most common way of creating DC voltage is through rectifying and filtering. Inverters are very important to be aware of, especially when designing VFDs for machines. There are three types of inverters:

a. The boost type

b. The buck type

c. The Cooking type

is the inverter that controls the speed of the motor by controlling the DC to AC conversion.

what is the difference between a breaking resistor and a bypass resistor?

A breaking resistor is any resistor that can break under a heavy current load. A typical example is an LED with a power rating of 3W or more. A bypass resistor is any resistor that cannot break. For example, a 1/8W resistor.

The term “bypass” means something is there in case you need it. For example, if your car has a power steering system, then the power steering pump has a bypass for the power steering fluid (it has a separate pump and reservoir). The bypass is there in case the fluid gets low. Similarly, in the computer world, the power supply has a bypass.


It is normally a fixed-value resistor that provides a specified resistance across its terminals. Resistance is basically a property of a material. This means that the smaller the resistance, the lesser the electrons will pass, and vice versa. There is no such thing as “exact” resistance in a resistor, unlike ohms which is a units of measurement.

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