Thyristor Application to Electric Rolling Stock

Onoda, Yoshimitsu; Izawa, Shoji; Kawakami, Naoe

doi:10.1109/tiga.1969.4181004

Cited by 10 publications

(3 citation statements)

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“…It may be noted that the average voltage in TRC :J is not much different from that in TRC 5 throughout the range of duty-ratio, a. Since the motor responds to the average voltage and rms current, it is, therefore, evident that a great difference is not expected in the input and output performance between TRC 3 and TRC 5 . How ever, the harmonic currents drawn from the ac supply system will be in different proportions as the instantaneous voltage applied across the motor terminals is different in TRC : input and output performance characteristics are shown for TRC 3 only.…”

Section: Frequency Dependencementioning

confidence: 94%

“…Therefore, only two frequencies are considered. Table 1 compares the average voltage in TRC 3 and TRC 5 for different values of duty-ratio, a. It may be noted that the average voltage in TRC :J is not much different from that in TRC 5 throughout the range of duty-ratio, a.…”

Section: Frequency Dependencementioning

confidence: 99%

“…On the other hand, a division into five equal periods will result in a chopper frequency of 600 Hz. The former is hereafter referred to as TRC 3 and the latter is referred to as TRC5 . The time-ratio 3 or duty-ratio, a in each period of the chopper is defined by toN A ch where t 0N is the time interval of the "ON" mode and T ch is the time period of the chopper.…”

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confidence: 99%

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Time ratio control (TRC) scheme for a DC series motor Part I: Performance

Sen

Doradla

1978

Can. Electr. Eng. J.

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This paper is concerned with the detailed study of time-ratio-control (TRC) scheme for a solid state dc series motor drive. The performance characteristics such as torque-speed, supply power factor, supply harmonic content, peak armature current variations are obtained and compared with those obtainable with the commonly used phase angle control (PAC) scheme under identical operating conditions. The comparative study has revealed that certain performances are improved in the TRC scheme. The drive systems with PAC and TRC schemes are simulated on a digital computer and an efficient time-saving method is employed for computation. Oscillograms obtained from the experimental setup using a 3 HP dc series motor are presented to demonstrate the feasibility of the schemes and to verify the basic principles of operation. Cet article traite de l'etude detaillee d'un projet de controle de rendement horaire (CRH) pour un entrainement moteur a semi-conducteurs en serie CC. Les caracteristiques de rendement telles que le rapport moment de torsion/vitesse, le coefficient de puissance d'alimentation, la teneur harmonique d'alimentation, et les fluctuations de pointe du courant d'induit, sont recueillies et comparees a celles obtenables avec le systeme communement utilise de controle d'angle de phase (CAP), dans des conditions de fonctionnement identiques. Cette comparaison montre que certaines performances sont meilleures dans le systeme CRH. Les systemes d'entrainement a CAP et a CRH sont simules sur ordinateur et une methode efficace et economique est employee pour le calcul. Des oscillogrammes obtenus dans Vexperience avec un moteur en serie CC de 3 CV, sont presenters pour illustrer la praticabilite des systemes et pour verifier les principes fondamentaux de 1'operation.

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Section: Frequency Dependencementioning

confidence: 94%

Section: Frequency Dependencementioning

confidence: 99%

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