Time Delay Relays – Application Data
... happens when voltage is applied and removed from the coil; on time delay relays, the contacts will open or close before or after a pre-selected, timed interval. Typically, time delay relays are initiated or triggered by one of two methods: • application of input voltage (On Delay, Interval On, Flash ...
... happens when voltage is applied and removed from the coil; on time delay relays, the contacts will open or close before or after a pre-selected, timed interval. Typically, time delay relays are initiated or triggered by one of two methods: • application of input voltage (On Delay, Interval On, Flash ...
WIPO IPC: Internet Publication
... Among the general applications covered by sections other than section H, it is worth noting that electric heating in general is covered by subclasses F24D or F24H or class F27, and that electric lighting in general is partly covered by class F21, since in section H (see I(c), above) there are plac ...
... Among the general applications covered by sections other than section H, it is worth noting that electric heating in general is covered by subclasses F24D or F24H or class F27, and that electric lighting in general is partly covered by class F21, since in section H (see I(c), above) there are plac ...
Aalborg Universitet "Active flux" orientation vector sensorless control of IPMSM
... sensorless control has emerged, thus involving very low or even zero speed operation [1]-[8]. The methods for sensorless position estimation can be divided into two main categories: approaches using backelectromotive-force (EMF) estimation with fundamental excitation and spatial saliency image track ...
... sensorless control has emerged, thus involving very low or even zero speed operation [1]-[8]. The methods for sensorless position estimation can be divided into two main categories: approaches using backelectromotive-force (EMF) estimation with fundamental excitation and spatial saliency image track ...
LifeAlarm Fire Alarm Controls
... night ringer tone activation, telephone page input, and background music Non-fire alarm paging includes zone control and zone volume adjustments that are bypassed when the panel is in alarm mode Models are available for 120 or 240 VAC input * Refer to page 4 for CSFM models listed by the Califor ...
... night ringer tone activation, telephone page input, and background music Non-fire alarm paging includes zone control and zone volume adjustments that are bypassed when the panel is in alarm mode Models are available for 120 or 240 VAC input * Refer to page 4 for CSFM models listed by the Califor ...
Separately Excited DC Motor Optimal Efficiency Controller
... independently controlling and the field current and armature voltage of d c motors for any torque and speed operating point. The quantities to be controlled are already accessible in phase-controlled rectifier dc power converters [8]. The control signals can be supplied by an open- loop controller w ...
... independently controlling and the field current and armature voltage of d c motors for any torque and speed operating point. The quantities to be controlled are already accessible in phase-controlled rectifier dc power converters [8]. The control signals can be supplied by an open- loop controller w ...
Trouble shooting on Extrusion Temperature Control Equipment
... If the amplifier gain is very high, the slightest error signal, minus or plus at its input gives full heater power or no heater power. You are now back to on/off control; power does not go off until the temperature has reached set point. Result, large overshoot and temperature swings. Solution. redu ...
... If the amplifier gain is very high, the slightest error signal, minus or plus at its input gives full heater power or no heater power. You are now back to on/off control; power does not go off until the temperature has reached set point. Result, large overshoot and temperature swings. Solution. redu ...
A Prototype Controller for Variable Reluctance Motors
... minimize the maximum feeding voltage, it is necessary to feed simultaneously all motor phases (not only two). This requirement strongly complicates the design of the torque sharing compensator. It can be fulfilled only if an analytic Fig. 2. Block diagram of the torque-sharing compensator. model of ...
... minimize the maximum feeding voltage, it is necessary to feed simultaneously all motor phases (not only two). This requirement strongly complicates the design of the torque sharing compensator. It can be fulfilled only if an analytic Fig. 2. Block diagram of the torque-sharing compensator. model of ...
PBS Products from Pyramid - Pyramid Technical Consultants
... replaceable thin polyimide windows. A mass-flow controller-based gas control system provides automatic control of flush and maintain input flow rates, and an oxygen sensor checks that helium has displaced all the air. ...
... replaceable thin polyimide windows. A mass-flow controller-based gas control system provides automatic control of flush and maintain input flow rates, and an oxygen sensor checks that helium has displaced all the air. ...
mcor30 technical manual
... which, for want of a better name, is termed a ‘volt-seconds’ control loop. In this scheme, the current in the inductor is dead reckoned by measuring the volt-seconds applied to it by the MOSFET bridge. Two RC integrators (C34,R48 and C35,R49) perform the volt-seconds measurement of the + and - outpu ...
... which, for want of a better name, is termed a ‘volt-seconds’ control loop. In this scheme, the current in the inductor is dead reckoned by measuring the volt-seconds applied to it by the MOSFET bridge. Two RC integrators (C34,R48 and C35,R49) perform the volt-seconds measurement of the + and - outpu ...
Application Notes for DC/DC Converters
... excessive high load in case it persists for a specified time (the protection delay time). The circuit is automatically released after removal of the excessive load and by triggering the soft start operation. The protection delay time is fixed within the IC. Foldback Type Protection decreases the osc ...
... excessive high load in case it persists for a specified time (the protection delay time). The circuit is automatically released after removal of the excessive load and by triggering the soft start operation. The protection delay time is fixed within the IC. Foldback Type Protection decreases the osc ...
AT-FM-10K Two-Hand Control Module
... add at least 20% as a safety factor to account for brake system deterioration. If the stop-time of the two redundant machine control elements is unequal, the slower of the two times must be used for calculating the separation distance. ...
... add at least 20% as a safety factor to account for brake system deterioration. If the stop-time of the two redundant machine control elements is unequal, the slower of the two times must be used for calculating the separation distance. ...
Fuzzy based controller for dynamic Unified Power Flow
... of FL controller is its robustness to system parameters and operating conditions changes [28]. Different controllers for UPFC have been presented in [29–31], based on FL. However, all the UPFC’s control methods are developed for the application of oscillation damping of power system network. Very fe ...
... of FL controller is its robustness to system parameters and operating conditions changes [28]. Different controllers for UPFC have been presented in [29–31], based on FL. However, all the UPFC’s control methods are developed for the application of oscillation damping of power system network. Very fe ...
BS31473481
... the rotor position signals are used to generate the switching quence for the VSI as an electronic commutator of the PMBLDC motor. Therefore, rotor-position information is required only at the commutation points, e.g., every 60°electrical in the three- phase [1-4]. The rotor position of PMBLDCM is se ...
... the rotor position signals are used to generate the switching quence for the VSI as an electronic commutator of the PMBLDC motor. Therefore, rotor-position information is required only at the commutation points, e.g., every 60°electrical in the three- phase [1-4]. The rotor position of PMBLDCM is se ...
HMC427LP3 / 427LP3E
... The HMC427LP3 & HMC427LP3E are low loss broadband positive control transfer switches in leadless surface mount packages. Covering DC to 8 GHz, this switch offers high isolation and low insertion loss. The switch operates using a positive control voltage of 0/+5V and requires a fixed bias of +5V @ ...
... The HMC427LP3 & HMC427LP3E are low loss broadband positive control transfer switches in leadless surface mount packages. Covering DC to 8 GHz, this switch offers high isolation and low insertion loss. The switch operates using a positive control voltage of 0/+5V and requires a fixed bias of +5V @ ...
Aalborg Universitet and Harmonics in Microgrids
... interface converter to control power flow and to compensate the voltage unbalance. This structure can be unattractive due to high cost and volume of the interface converter. In [5], each DG unit of microgrid is controlled as a negative sequence conductance to compensate voltage unbalance. An autonom ...
... interface converter to control power flow and to compensate the voltage unbalance. This structure can be unattractive due to high cost and volume of the interface converter. In [5], each DG unit of microgrid is controlled as a negative sequence conductance to compensate voltage unbalance. An autonom ...
Active Power Quality Improvement Strategy for Grid - VBN
... The virtual impedance control loop was developed to optimize inductance-to-resistance (X/R) ratio of the inverter’s equivalent output impedance. This control loop is usually added to the MG’s primary control to guarantee the good performance of a regular droop controller. However, reactive load shar ...
... The virtual impedance control loop was developed to optimize inductance-to-resistance (X/R) ratio of the inverter’s equivalent output impedance. This control loop is usually added to the MG’s primary control to guarantee the good performance of a regular droop controller. However, reactive load shar ...
C2175 Datasheet
... output cable. The amount of compensation applied (GCAB) is specified in Table 2 on page 12. Use the formula below to match cable compensation with output cable resistance (RCAB). Refer to the table above Figure 3 for the definition of symbols used in the equation. ...
... output cable. The amount of compensation applied (GCAB) is specified in Table 2 on page 12. Use the formula below to match cable compensation with output cable resistance (RCAB). Refer to the table above Figure 3 for the definition of symbols used in the equation. ...
Aalborg Universitet Control Strategies for Islanded Microgrid using Enhanced Hierarchical Control
... In islanded mode, the local loads should be supplied by the DG units, which now act as controlled voltage sources (CVS) [3]. And the MGs need some form of control in order to avoid circulating currents between the DG units and ensure stable and efficient operation. The important roles that can be ac ...
... In islanded mode, the local loads should be supplied by the DG units, which now act as controlled voltage sources (CVS) [3]. And the MGs need some form of control in order to avoid circulating currents between the DG units and ensure stable and efficient operation. The important roles that can be ac ...
CDB53L21 - cloudfront.net
... The control port header provides bidirectional access to the SPI™/I²C® control port signals by simply removing all the shunt jumpers from the “PC” position. The user may then choose to connect a ribbon cable to the “CONTROL” position, allowing operation of the CS53L21 in a user-application for syste ...
... The control port header provides bidirectional access to the SPI™/I²C® control port signals by simply removing all the shunt jumpers from the “PC” position. The user may then choose to connect a ribbon cable to the “CONTROL” position, allowing operation of the CS53L21 in a user-application for syste ...
Technical Manual
... With dspDrive®, the motor current is controlled directly by a digital signal processor. Unlike conventional ICs, which resolve the winding current measurement and the target current value with only 6 or 8 bit, the new dspDrive® performs the entire control with a resolution of 12 bit. The parameters ...
... With dspDrive®, the motor current is controlled directly by a digital signal processor. Unlike conventional ICs, which resolve the winding current measurement and the target current value with only 6 or 8 bit, the new dspDrive® performs the entire control with a resolution of 12 bit. The parameters ...
Control theory
Control theory is an interdisciplinary branch of engineering and mathematics that deals with the behavior of dynamical systems with inputs, and how their behavior is modified by feedback. The usual objective of control theory is to control a system, often called the plant, so its output follows a desired control signal, called the reference, which may be a fixed or changing value. To do this a controller is designed, which monitors the output and compares it with the reference. The difference between actual and desired output, called the error signal, is applied as feedback to the input of the system, to bring the actual output closer to the reference. Some topics studied in control theory are stability (whether the output will converge to the reference value or oscillate about it), controllability and observability.Extensive use is usually made of a diagrammatic style known as the block diagram. The transfer function, also known as the system function or network function, is a mathematical representation of the relation between the input and output based on the differential equations describing the system.Although a major application of control theory is in control systems engineering, which deals with the design of process control systems for industry, other applications range far beyond this. As the general theory of feedback systems, control theory is useful wherever feedback occurs. A few examples are in physiology, electronics, climate modeling, machine design, ecosystems, navigation, neural networks, predator-prey interaction, gene expression, and production theory.