Showing papers on "Maximum power transfer theorem published in 1983"
TL;DR: In this article, a detailed circuit representation of a six phase synchronous machine with mutual leakage couplings between the two sets of three phase stator windings is described, and the main modes of power transfer of a 6 phase machine with sinusoidal inputs are examined.
Abstract: This paper describes a detailed circuit representation of a six phase synchronous machine wherein mutual leakage couplings between the two sets of three phase stator windings are included. The main modes of power transfer of a six phase machine with sinusoidal inputs are examined. A harmonic phasor method of steady-state analysis to obtain the current, voltage and torque waveforms of a six phase machine with mixed AC-DC stator connections is described. It is shown that the output waveforms for various operating conditions from a digital computer program using the harmonic phasor method agree remarkably well with those obtained from an established detailed analog simulation.
128 citations
Patent•
11 Oct 1983TL;DR: In this article, a system for transferring maximum power from a solar cell array by loading the array in a manner which forces it to operate at its maximum power point was proposed, where the system samples the open circuit voltage of the solar cell arrays to provide a signal proportional to the voltage of an array at its highest power point.
Abstract: A system for transferring maximum power from a solar cell array by loading the array in a manner which forces it to operate at its maximum power point. The system samples the open circuit voltage of the solar cell array to provide a signal proportional to the voltage of the array at its maximum power point. The sampled open circuit voltage is compared to the operating voltage of the solar cell array to provide an error signal which is proportional to the difference between the maximum power point voltage and the operating voltage of the array. The amount of power transferred from the array to a load is altered in accordance with the error signal to operate the array at its maximum power point.
75 citations
Patent•
02 Dec 1983
TL;DR: In this article, an electrical power transfer system for matching a load to a DC source such as a solar array is described, where the system tracks the power output of the source under varying operating conditions and matches the load to the source to maintain peak power conditions.
Abstract: This disclosure relates to an electrical power transfer system for matching a load to a DC source such as a solar array. The system tracks the power output of the source under varying operating conditions and matches the load to the source to maintain peak power conditions. The system senses the voltage and the current of the source, incrementally changes the volt-ampere operating point of the source and thereby changes its incremental resistance, and adjusts the load to the level where the ratio of the DC source voltage to the DC source current is substantially equal to the incremental resistance.
70 citations
TL;DR: A multiport maximum power theorem for nonlinear resistive networks is reported and an application to the optimal load-matching problem for a solar cell is given.
Abstract: This paper reports a multiport maximum power theorem for nonlinear resistive networks. The optimal nonlinear load characteristic is specified as a closed-form expression involving the constitutive relation of the source. An application to the optimal load-matching problem for a solar cell is given.
27 citations
Patent•
28 Feb 1983
TL;DR: In this article, a DC-AC converter for supplying power from a DC power source to a load that is also supplied power by an AC power source is presented. But the application of the DC source to the load is limited to less than the duration of each half cycle of the AC source.
Abstract: A DC-AC converter for supplying power from a DC power source to a load that is also supplied power by an AC power source. The DC power source is applied to the load with alternating polarity at the frequency and phase of the AC power source. Transients are reduced by limiting the application of the DC power source to the load to less than the duration of each half cycle of the AC power source.
19 citations
TL;DR: In this paper, it was shown that the unique real symmetric positive-definite load impedance which achieves maximum power transfer to the load for all equivalent open-circuit voltages was defined.
Abstract: Given an n -port specified by V = E - jXI where X is real, symmetric, and positive-definite, it is shown that R_{L}=X is the unique real symmetric positive-definite load impedance which achieves maximum power transfer to the load R_{L} for all equivalent open-circuit voltages E .
10 citations
01 Sep 1983
TL;DR: In this article, the problem of maximizing the energy or average power transfer from a nonlinear dynamic n-port source was considered, and an operator equation for the optimal output voltage was derived, and a numerical method for solving it was given.
Abstract: This paper considers the problem of maximizing the energy or average power transfer from a nonlinear dynamic n-port source. The main theorem includes as special cases the standard linear result Yload = Y*source and a recent finding for nonlinear resistive networks. An operator equation for the optimal output voltage 9(.) is derived, and a numerical method for solving it is given.
5 citations
TL;DR: In this article, the maximum power transfer conditions for full-wave rectifier circuits were determined for three types of series impedances: resistive/inductive (RL), resistive-capacitive (RC), and RLC, and the optimum ratio of ac-to-dc voltage output was determined for each type.
Abstract: An analysis is done to determine the maximum power transfer conditions for full-wave rectifier circuits. Potential applications noted are implanted medical instruments, inductive power transfer to weapons, power transfer using space reflectors, and power generation in space. Three types of series impedances are considered: resistive/inductive (RL), resistive/capacitive (RC), and resistive/inductive/capacitive (RLC). The optimum ratio of ac-to-dc voltage output is determined for each type. For the case that involves all three impedance types, the optimum turning condition is also determined. The differential equations describing the circuits are solved in nondimensional form. The solutions involve partial differential equations, closed-form relationships, and simultaneous equations that are solved by numerical methods. The optimum ratio of peak ac-to-dc voltage ranges from 2.0 to 2.8, depending upon the circuit. The optimum turning differs significantly from the usual resonant conditions, especially for low Q.
4 citations
TL;DR: In this article, the wave impedance associated with a single conductor power transmission line is discussed and the magnitudes and phases of the impedance components Z r and Z r approximate, respectively, average values of 60 and 365 \Omega and -84\deg and 0\deg.
Abstract: The wave impedance associated with a single conductor power transmission line is discussed. Computed results show that for power line carrier (PLC) frequencies and within the inductive field the magnitudes and phases of the impedance components Z_{r} and Z_{\theta} approximate, respectively, average values of 60 and 365 \Omega and -84\deg and 0\deg .
2 citations
TL;DR: In this article, an excitation control system is described that is based on five identifiable stages of the transient behaviour following a disturbance, which combines discrete control with power system stabilizers and automatic voltage regulators.
2 citations
TL;DR: In this article, the characteristics of continuous-wave wideband traveling-wave tube amplifiers have been experimentally investigated over a frequency range of 1.5 to 4.5 GHz.
Abstract: The characteristics of continuous-wave wideband traveling-wave tube amplifiers have been experimentally investigated over a frequency range of 1.5 to 4.5 GHz. We present measurements of characteristics important for stochastic beam cooling systems that are generally not available from manufacturers' data sheets. The amplifiers measured include models 1177 H01 and 1277 H01 having output power capabilities of 10 to 20 W, respectively, at frequencies of 2 to 4 GHz. The power transfer characteristics, the phase-shift characteristics as functions of frequency and the input power level, the voltage standing-wave ratio, harmonics and intermodulation products content were accurately measured and are discussed. Also several approaches are discussed for the reduction of harmonics and intermodulation products.