Abstract:
Antriebsstromversorgungsvorrichtung, die einen Permanentmagnet-Synchronmotor (nachfolgend PM-Motor genannt) mit N Teilen von Phasen (N ist eine positive Ganzzahl von 3 oder größer) antreibt, indem eine Gleichstrom-Stromversorgung (1) eingesetzt wird, umfassen: ein Impulsspannungserzeugungsmittel (2), das eine Eingabe aus Wechselstromeingangsanschlüssen (a, b) über eine Drossel (3) aus der Gleichstrom-Stromversorgung (1) empfängt, ein Polaritätsumschaltmittel (5), das mit Gleichstromausgabeanschlüssen (c, d) des Impulsspannungserzeugungsmittels (2) verbunden ist und welches am Impulsspannungserzeugungsmittel (2) erzeugte Impulsspannung als Wechselstrom an den PM-Motor liefert, indem für jede Phase des PM-Motors umgeschaltet wird, einen Glättungsinduktor, um die Ausgabe des Polaritätsumschaltmittels (5) zu glätten, einen Drehpositionssensor (6), um eine Drehposition des PM-Motors (4) zu detektieren und ein Drehpositionssignal auszugeben, und ein Steuermittel (7), um EIN/AUS-Steuerung von Schaltern des Impulsspannungserzeugungsmittels (2) und des Polaritätsumschaltmittels (5) durchzuführen, wobei das Impulsspannungserzeugungsmittel (2) vier reverse konduktive Halbleiterschalter (S1, S2, S3, S4), die als eine Brücke miteinander verbunden sind, und einen...
Abstract:
In order to provide a pulse power supply device using regenerating magnetic energy stored in a discharge circuit to a capacitor so as to use it as next discharge energy and supplying a bipolar pulse current with high repetition, a bridge circuit is composed of four inverse-conductive semiconductor switches, a charged energy source capacitor is connected to a DC terminal of the bridge circuit, and an inductive load is connected to its AC terminal. A control signal is supplied to gates of the inverse-conductive semiconductor switches, and a control is made so that when a discharge current rises, is maintained or is reduced, all the gates are turned off, and the magnetic energy of the electric current can be automatically regenerated to the energy source capacitor by a diode function of the switches. Further, a large-current power supply is inserted into a discharge circuit so as to replenish energy loss due to discharge, thereby enabling high-repetition discharge.
Abstract:
PROBLEM TO BE SOLVED: To provide an electric power conversion system with high efficiency and insulation type.SOLUTION: The electric power conversion system comprises: a series circuit comprised of a DC power supply 100, a primary coil and an MERS 120; a secondary coil 132 electromagnetically connected with the primary coil 131; and a load 180 connected with the secondary coil 132. At a capacitor CM of the MERS 120, a voltage higher than a voltage of the DC power supply 100 is generated. A voltage of a capacitor CM alternates correspondingly to on-off operations of the MERS 120 and is applied to the primary coil 131. Thus, an electric current flows through the secondary coil 132 and electric power is supplied to the load 180.
Abstract:
PROBLEM TO BE SOLVED: To provide a low-loss current-fed series resonance DC/DC converter that can bi-directionally supply DC power and can perform soft switching with simple control regardless of power supply output voltage.SOLUTION: The current-fed series resonance DC/DC converter discharges electrostatic energy accumulated on capacitors CM1 and CM2 by turning on MERSs 101 and 102 to accumulate the energy on an inductor Lm as magnetic energy, and accumulates the magnetic energy accumulated on the inductor Lm onto a capacitor on the power receiving side by turning off the MERS on the power receiving side earlier than the MERS on the power supplying side, and charges a battery on the power receiving side with the electrostatic energy accumulated on the capacitor.
Abstract:
PROBLEM TO BE SOLVED: To provide a power conversion equipment which can supply a load with an AC current having desired frequency from an AC voltage source, has small change in the peak value of the voltage supplied to the load, and in which loss is low, and to provide a control method of the power conversion equipment.SOLUTION: A power conversion equipment 10 comprises: reactor Lacs 1 to 3 connected to each phase of a three-phase AC power supply 21; a three-phase bridge MERS 100; a DC AC conversion circuit 200; and a control circuit 300. The control circuit 300 controls on/off of six reverse conduction type semiconductor switches constituting the three-phase bridge MERS 100 in order to repeatedly generate a DC voltage of pulse format in a capacitor CM of the three-phase bridge MERS 100. The DC voltage of pulse format generated in the capacitor CM is converted into AC voltage via the DC AC conversion circuit 200 so as to be applied to inductive loads LD1, LD2, and LD3.
Abstract:
PROBLEM TO BE SOLVED: To provide a solar panel booster with high efficiency and insulation type and photovoltaic power generation system.SOLUTION: The electric power conversion system comprises: a series circuit comprised of a DC solar panel 100, a primary coil 131 and an MERS 120; a secondary coil 132 electromagnetically connected with the primary coil 131; and a DC bus-bar 180 connected with the secondary coil 132. At a capacitor CM of the MERS 120, a voltage higher than a voltage of the solar panel 100 is generated. A voltage of a capacitor CM alternates correspondingly to on-off operations of the MERS 120 and is applied to the primary coil 131. Thus, an electric current flows through the secondary coil 132 and electric power is supplied to the DC bus-bar 180.
Abstract:
PROBLEM TO BE SOLVED: To synchronize a timing of pulse generation in a power transmission device with a timing of pulse reception in a power receiving device.SOLUTION: A Magnetic Energy Recovery Switch (MERS) receiving device 500 transmits electric power information indicative of an electric energy required for the MERS receiving device 500 to a MERS direct-current pulse router 400. The MERS direct-current pulse router 400 determines changing time of a power transmission side switch included in a MERS direct-current pulse converter 300 and a changing time of a power receiving side switch included in the MERS receiving device 500 on the basis of the received electric power information. The MERS direct-current pulse converter 300 generates the pulse current on the basis of the determined changing time of the power transmission side switch. The MERS receiving device 500 receives the pulse current on the basis of the determined changing time of the power receiving side switch.
Abstract:
PROBLEM TO BE SOLVED: To provide an induction motor control device, etc. which is adapted to realize more stable startup than ever or exert control to run an induction motor stably even when external disturbance is applied to it during operation.SOLUTION: MERSs 100u, 100v and 100w generate voltage equivalent to voltage generated by an AC power supply VS whose phase is varied by a value θset and apply voltage equivalent to a sum of this voltage and the voltage generated by the AC power supply to an induction motor M. A control unit 200 determines θset in such a way that a load current detected by a current detection unit GM converges to a value Iset and the effective value of a fundamental wave component of a load voltage detected by a voltage detection unit VM converges to a value Vset which is determined based on a deviation in the load current from the value Iset. While so doing, it also exerts feed-forward control so that a value proportional to the differential of this fundamental wave component and a value proportional to the load current become a value of θset, and then determines the transition timing of each gate signal based on this value of θset before feeding the gate signal to each MERS.