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  • Grainger power electronics and motor drives laboratories at Illinois Institute of Technology
    … 3: Power Transistor, Power MOSFET, and IGBT • Exp. 4: UJT , Pulse Transformer, and Firing … … 5: Single-Phase AC/ DC Rectifiers • Exp. 6 … … Demonstration – Research Projects In the final demonstration, research … … Power Electronics and Motor Drives Laboratory are presented by …
  • CR4 - Thread: HV Termite Terminator Power Supply Design Approach?
    Back in the early 70's I designed and sold several capacitor discharge (CD) units driven by a UJT transistor to provide a continuous spark. They had used a dc motor to drive a distributor to fire an ignition coil continuously; very …
  • Power Electronics - an Emerging Technology
    Switching mode dc- dc converters (choppers) were introduced initially hy using force-commutated thyristors. The switching frequency of this class of converters could be raised when UJT 's became available, and … In the middle and late I96O's, thyristor resonant inverters Phase-Controlled Cycloconverter Drive of AC Machine .
  • Abstracts of Dissertations
    Results obtained from those dogs stimulated with the UJT oscillator indicated massive osteogenesis in the vicinity of stimula- tion. Less bone was usually formed in response to dc stimulation, and little or no bone was formed … Maximum tissue response usually occurred when the bone was driven at low fre- quency with a short …
  • Electronic Technology Handbook > ACTIVE DISCRETE COMPONENTS
    In a switching power supply, it can convert DC from a battery to AC to perform such tasks as driving the motor of an electric vehicle. A unijunction transistor ( UJT ), as shown in the section view of Fig. 2-17a, is a three …
  • A method to build up the voltage of self‐excited ac generator and constant voltage control by DC chopper
    This circuit is driven by a dc voltage which is obtained by rectifying the output voltage of potential transformer PT through rectifier Rec 3 and smoothing circuit R 1 C1. … to the gate of thyris- tor TMof the chopper circuit is generated by UJT and this pulse … The control input signal is generated by a differential comparator as shown in Fig. 5 (a), where …
  • Subject Index
    Capacitance transducers angular position transducer using variable capacitor as timing in UJT relaxation oscillator. Sinha, Naresh K., T-IECI 76 Aug 314-318 (2B10) Choppers dc motor drive thyristor choppers; commutation circuit design.
  • Author Index
    Capacitance transducers angular position transducer using variable capacitor as timing in UJT relaxation oscillator. Sinha, Naresh K., T-IECI 76 Aug 314-318 (2B10) Choppers dc motor drive thyristor choppers; commutation circuit design.
  • HIGH SPEED DIODE LASERS
    First, because stimulated emission is the driving force that couples the photon and carrier populations and since the stimulated emission process is proportional to the photon density, the resonance frequency should depend on the photon density in the cavity. The current, photon density, and carrier density can be represented as a dc component (7n, no, so … (SIeiaJt, 8ne, ujt , .
  • A DC controlled reactor using thyristors
    This results in a nonlinear dc voltage versus current curve shown in Fig. 5. A standard UJT relaxation oscillator was chosen logic andthe driving .