Breaking means the intentional reduction of speed of the particular motor normally this three phase induction motor breaking methods done by causing the motor to produce the reverse torque there are three types of basic techniques are apply for the breaking of induction motors such as following plugging breaking dynamic braking . This method is applied commonly to brake the motors driving active loads dynamic braking is employed in conjunction with automatic control the braking of induction motor is more popular in hoists than the dc motor due to this feature the methods of feeding a dc supply to the stator are depicted in fig 150. Two loads dc dynamic braking operation now coming to the method of operation the moment when ac supply is disconnected and dc supply is introduced across the terminals of the induction motor there is a stationery magnetic field generated due to the dc current flow and as the rotor of the motor rotates in that field there is a field induces in the rotor winding and as a result the machine . Brakes are used to reduce or cease the speed of motors we know that there are various types of motors available dc motors induction motors synchronous motors single phase motors etc and the specialty and properties of these motors are different from each other hence this braking methods also differs from each otherbut we can divide braking in to three parts mainly which are . Braking a motor two common basic methods used for braking a motor are dc injection braking and dynamic braking we will look at both in detail starting with electric braking
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