Since the voltage drop across the device is defined, the power devices are connected in series with a defined number of repetitions of the resistor and inductor. Within the bus, each device gets a defined voltage. The resistor and the inductor elements are necessary to filter and to reduce the ripple from the power source. A micro-motor drive made using power electronics is also known as digital stepper motor.Ī power bus is a common path for all the power devices to share the common AC and/or DC power source. The advantages of such devices are cheap price and low efficiency, high reliability, and ease of assembly and integration. Some of the important applications of power electronics devices include micro-electromechanicalsystem (MEMS) actuator and motor driver, switched-mode power supplies, power filtering, and transformer and induction heating. The major advantage of an SMPS design is the elimination of reactive elements and a reduction in the size of the filter. An SMPS changes speed of an AC or DC power source, rectifier or inverter, in response to an input signal. A different type of power device is the switched-mode power supply (SMPS). They are controlled by suitable circuitry to maximize overall efficiency and improved reliability. Most power electronics devices in our hi-tec world are actively controlled devices such as SCRs and IGBTs.
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