Three diode rectifier energy consumption braking circuit

In the circuit shown in the figure, when STP is pressed and the AC contactor KM is de-energized and released, the KMB and KT coils immediately receive electrical action. The two sets of main contacts of KMB short-circuit the three-phase winding leads of the motor M, and the other three The main contacts of the group are introduced into a three-phase half-wave rectified power supply, so that the stator windings of the motor M are connected into a parallel symmetrical line with one end connected to the neutral line to achieve the purpose of braking. Then KT is delayed and disconnected, KMB is released when power is lost, and braking ends. R is the limiting resistor.