Products/Services for UJT In DC Drive

  • DC Motor Drives-Image
    DC Motor Drives - (681 companies)
    ...to a majority of DC motor drives which adjust shaft speed. In industry, a 'drive controller' is a motor drive which incorporates functions of a programmable logic controller (PLC) and drive interface to regulate the speed, torque, horsepower, and direction... Search by Specification | Learn More
  • Motor Controllers-Image
    Motor Controllers - (770 companies)
    ...is used to program the DSP chip. Silicon controlled rectifiers (SCR) are used in DC motor drives to rectify the AC input to produce the DC current drive. Digital signal processors (DSP)are microprocessors which use real-time data, such as audio... Search by Specification | Learn More
  • DC Servomotors-Image
    DC Servomotors - (443 companies)
    ...offering a standard interface that can be used on any servo drive. They are typically the lowest cost and most versatile, and are used when retaining absolute position is not necessary. They may be designed as optical encoders which use a light... Search by Specification | Learn More
  • DC Motors-Image
    DC Motors - (1185 companies)
    DC motors are most commonly used in variable speed and torque applications. They include brushless and gear motors, as well as servomotors. How to Select DC Motors. Image Credit: Dart Controls, Inc.; Galil Motion Control; Stock Drive Products... Search by Specification | Learn More
  • Unijunction Transistors (UJT)-Image
    Unijunction Transistors (UJT) - (21 companies)
    Unijunction transistors (UJT) are three-terminal devices that exhibit a negative resistance characteristic. Unijunction Transistors (UJTs) Information. Unijunction transistors (UJTs) are three-terminal devices that have only one PN junction. When... Search by Specification | Learn More
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    DC-DC Converters - (751 companies)
    DC-DC converters accept DC input and provide regulated and/or isolated DC output in various applications including computer flash memory, telecommunications equipment, and process control systems. How to Select DC-DC Converters. What are DC-DC... Search by Specification | Learn More
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    DC Motor Starters - (136 companies)
    DC motor starters combine a controller (most often a contactor) with overload protection, allowing a motor or motor-controlled equipment to be turned on and off. DC motor starters allow a DC motor or motor-controlled device to be turned on or off... Search by Specification | Learn More
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    DC-AC Inverters - (649 companies)
    How to Select DC to AC Inverters. DC/AC Pure Sine Wave Inverter. Image Credit:Analytic Systems Inverter Image Credit: Digi-Key. DC to AC inverters are used for converting direct current (DC) into alternating current (AC). They are also known as DC... Search by Specification | Learn More
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    AC-DC Adapters - (368 companies)
    AC-DC adapters accept AC input voltage directly from a wall outlet, and output DC voltage. Description. AC/DC adapters accept AC input voltage directly from a wall outlet, and output DC voltage. The primary configurations are wall-mount, where... Search by Specification | Learn More
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    DC Power Supplies - (1199 companies)
    DC power supplies accept an input power and output the desired form of DC power. Common types of DC power supplies include linear power supplies, switching power supplies, DC-DC converters, and silicon controlled rectifier (SCR) type power supplies... Search by Specification | Learn More
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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.
  • 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 .
  • A High-Performance ac Position Servo Using a dc Motor
    � be noted here that simple transformers are cheaper than regu- lated or unregulated dc supplies used conventionally � The next point in the design of the amplifier lies in the choice of firing circuit and � The least expensive firing device is the uni- junction transistor ( UJT ) with pulse transformers coupling to the � This was performed by using two UJT drives , one of which is shown schematically in Fig. 5 �