How is chopper used in speed control of dc motor?

How is chopper used in speed control of dc motor?

One of the popular methods of speed control of DC motor is using chopper. Chopper is a device that gives variable DC output from applied fixed DC input. It simply chops fixed DC and generates variable DC. So as duty cycle is more the average DC voltage supplied to motor is more and so speed of motor is increased.

What is chopper control of DC motor?

The chopper converts the fixed DC voltage to variable DC voltage. The most important feature of chopper control is that the regenerative braking is carried out at very low generating speed when the drive is fed from a fixed voltage to low DC voltage.

Which DC chopper is suitable for speed control of DC motor in both the directions?

The Insulated Gate Bipolar Transistor (IGBT) is used for speed control of DC motor which is very smooth in operation. The chopper circuit is designed by Insulated Gate Bipolar Transistor (IGBT) to control the speed of DC motor in both direction.

What is a chopper motor?

A chopper is a device that converts fixed DC input to a variable DC output voltage directly. Essentially, a chopper is an electronic switch that is used to interrupt one signal under the control of another.

What is chopper drive?

Chopper Drives The chopper drive is a constant current drive and is almost always the bipolar type. The chopper gets its name from the technique of rapidly turning the output power on and off (chopping) to control motor current.

What are the methods of control strategies of chopper control which is best suited for DC motor control?

(3.25), that, average value of output voltage, V can be controlled by periodic opening and closing of the semiconductor switch. There are two types of control strategies for operating the switches that can be used in dc choppers. These control strategies are time-ratio control (TRC) and current limit control.

Which method is suitable for the speed control below and above?

Voltage control method is suitable for speed control, below and above normal rated speed of d.c. shunt motor. Q.

What is speed control of motor?

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.

How does a chopper circuit work?

A chopper circuit is used to break up the input signal so that it can be processed as if it were an AC signal, then integrated back to a DC signal at the output. In this way, extremely small DC signals can be amplified.