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H bridge is used to supply power to a two terminal device. By proper arrangement of the switches, the polarity of the power to the device can be changed. Two examples are discussed below, DC motor Driver and transformer of switching regulator. Note that, not all of the case of switching condition is safe.
Charge pumps are used in H bridges in high-side drivers for gate-driving high-side n-channel power MOSFETs and IGBTs. When the centre of a half bridge goes low, the capacitor is charged through a diode, and this charge is used to later drive the gate of the high-side FET a few volts above the source voltage so as to switch it on.
Due to the charge storage characteristics of a capacitor, the bootstrap voltage will rise above (V+) providing the needed gate drive voltage. A bootstrap circuit is often used in each half-bridge of an all-N-MOSFET H-bridge. When the low-side N-FET is on, current from the power rail (V+) flows through the bootstrap diode and charges the ...
In power supply design, a bridge circuit or bridge rectifier is an arrangement of diodes or similar devices used to rectify an electric current, i.e. to convert it from an unknown or alternating polarity to a direct current of known polarity. In some motor controllers, an H-bridge is used to control the direction the motor turns.
Half-Bridge can refer to: A single-direction configuration of an H-Bridge motor controller; A form of DC to DC converter switched-mode power supply. One of a pair of devices that connect to perform the Bridging (networking) function of a computer network
H-bridge inverter circuit with transistor switches and antiparallel diodes. There are many different power circuit topologies and control strategies used in inverter designs. [16] Different design approaches address various issues that may be more or less important depending on the way that the inverter is intended to be used.
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Various AC motor drives have been developed for speed, torque, and position control of AC motors. These drives can be categorized as low-performance or as high-performance, based on whether they are scalar-controlled or vector-controlled, respectively. In scalar-controlled drives, fundamental stator current, or voltage frequency and amplitude ...
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