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H bridge gate driver circuit10/29/2022 ![]() ![]() The main circuit switches T1 to T4, which is actually an ideal model for various semiconductor switching devices. uo contains all harmonics and can be filtered by a filter if a sinusoidal voltage is desired. In this way, the DC voltage E is turned into AC voltage uo. When switching switches T1, T4 and T2, T3 alternately at frequency fS, an alternating voltage waveform (square wave alternating positive and negative) is obtained at the load resistor R with period Ts=1/fS. The operating principle of a single-phase bridge inverter circuit as shown in the figure H-bridge inverter (single-phase) D1, D2, D3, D4 are MOS-FET continuity diodes. Here there are four switching components Q1, Q2, Q3, Q4, in addition to a DC motor M. The H-bridge is shown in detail in the following figure. ![]() Through the opening and closing of switches, DC power (from batteries, etc.) is inverted into AC power of a certain frequency or variable frequency, which is used to drive AC motors (asynchronous motors, etc.). The H-bridge circuit can be built as discrete components or integrated into an integrated circuit and is often used in inverters (DC-AC conversion). 4 transistors form the 4 vertical legs of H, and the motor is the horizontal bar in H. ![]() H-bridge is a typical DC motor control circuit because its circuit shape resembles the letter H, so it is named with "H-bridge". These circuits are used in robots and other real-world applications for DC motor inversion control and speed control, stepper motor control (bipolar stepper motors must also contain two H-bridge motor controllers), most DC-AC converters in electrical energy conversion (such as inverters and inverters), some DC-DC converters (push-pull converters), and other power electronics devices. An H-bridge is an electronic circuit that reverses the voltage/current at both ends of the load or output to which it is connected. ![]()
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