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Basic H-Bridge Circuit Diagram

Thursday, 12. November 2009 by wire

An H-bridge is an electronic circuit which enables a voltage to be applied across a load in either direction. H-Bridges Circuit are often used to control the speed, position or torque of DC and stepper motors. An H-bridge is built with four switches (solid-state or mechanical). It takes a DC supply voltage and provides 4-quadrant control to a load connected between two pairs of power switching transistors. Below schematic diagram shows the Basic H-Bridge Circuit Diagram.

basic h-bridge circuit diagram

When the switches A1 and B2 switches and closed the A2 and B1 switches, a positive voltage will be applied across the motor. Because the switches allow current to flow bidirectionally, the voltage across the load and the direction of current through the load can be of either polarity.

Three-Phase Full Wave Bridge Rectifier Circuit Diagram

Tuesday, 27. October 2009 by wire

A rectifier is an electrical device that converts alternating current (AC) to direct current (DC), a process known as rectification. This almost always involves the use of some device that only allows one-way flow of electrons, a diode. Below schematic diagram shows a Three-Phase Full Wave Bridge Rectifier Circuit Diagram. Each three-phase line connects between a pair of diodes: one to route power to the positive (+) side of the load, and the other to route power to the negative (-) side of the load.

3 phase full wave rectifier circuit diagram