Abstract: A motor drive apparatus includes: a rectifier circuit that converts a power supply voltage from a single-phase or three-phase AC power supply into a DC voltage; an inverter circuit that converts the DC voltage output from the rectifier circuit into a motor drive voltage and outputs the motor drive voltage to a motor; a control unit that controls the rectifier circuit and the inverter circuit; and a detection unit that detects a decrease in the power supply voltage based on a voltage value or phase of the power supply voltage. The control unit controls the rectifier circuit and the inverter circuit to output a motor power calculated from a target speed of the motor to the motor, when a decrease in the power supply voltage is not detected. The control unit controls the inverter circuit to maintain a voltage of a DC link connecting the rectifier circuit and the inverter circuit by using regenerative power obtained from the motor, when a decrease in the power supply voltage is detected.

Abstract: The invention relates to an inductive component having a planar conductive track structure. The planar conductive track structure is surrounded along a predetermined section by a ferromagnetic core. For targeted control of the current flow inside the planar conductive track structure and, in particular, of the current density in the cross-section of the planar conductive track structure, gaps are provided in a targeted manner in the ferromagnetic core. The gaps in the ferromagnetic core are arranged in regions above and/or below the planar conductive track structure.

Abstract: An inverter includes: a high electric potential input terminal, a low electric potential input terminal, an output terminal that outputs AC power, a transistor pair, a driver that performs complementary switching control of the transistor pair. The driver includes a current adjustment element that adjusts the channel current and a voltage adjustment element that adjusts the channel voltage of the transistor pair, and adjusts, in the switching control of the transistor pair, the time change rate of the channel current to be larger than the time change rate of the channel voltage.

Abstract: The invention relates to the galvanically isolated transmission of electrical power between three voltage systems. For this purpose, a transformer is provided which comprises a total of five windings. The transmission between the individual voltage systems can be controlled by targeted manner activation of the individual windings.

Abstract: An AC-AC converter circuit converts an AC voltage into a further AC voltage. A rectifier circuit rectifies the AC voltage. An inverter circuit generates the further AC voltage. AZ source circuit is provided between the rectifier circuit and the inverter circuit.

Abstract: Provided is a rotary electric machine including: a permanent magnet rotatable around a first rotational shaft and disposed at a distance from a main surface of a moving body rotating or moving, at least a part of a side surface of the permanent magnet continuous to an outer peripheral surface thereof being opposed to the main surface of the moving body, wherein the permanent magnet is rotated around the first rotational shaft by a reaction force acting on the permanent magnet, the reaction force being caused by eddy currents produced in the main surface of the moving body in such a direction as to hinder a change of magnetic flux from the permanent magnet, and a surface speed of the side surface of the permanent magnet opposed to the moving body is lower than a surface speed of the main surface of the moving body opposed thereto.

Abstract: An AC-AC power convertor converts a first AC voltage to a second AC voltage. A PFC rectifier circuit rectifies an AC voltage (vG) so as to generate a rectified voltage. An inverter generates the second AC voltage from the rectified voltage. A controller controls the PFC rectifier circuit and the inverter such that power generated by the first AC voltage and the pulsations of power generated by the rectified voltage are output to an external device.

Abstract: The invention relates to an inductive component having a planar conductive track structure. The planar conductive track structure is surrounded along a predetermined section by a ferromagnetic core. For targeted control of the current flow inside the planar conductive track structure and, in particular, of the current density in the cross-section of the planar conductive track structure, gaps are provided in a targeted manner in the ferromagnetic core. The gaps in the ferromagnetic core are arranged in regions above and/or below the planar conductive track structure.

Abstract: The invention relates to the galvanically isolated transmission of electrical power between three voltage systems. For this purpose, a transformer is provided which comprises a total of five windings. The transmission between the individual voltage systems can be controlled by targeted manner activation of the individual windings.

Abstract: A converter for controlling power flows between three electricity networks with different operating voltages. The converter includes, in one implementation, three terminals and two converter cells. Each of the three terminals are configured to electrically contact-connect one of the three electricity networks. Each of the two converter cells includes a transformer having three converter cells. One of the terminals is connected to a series circuit of the converter cells. Another of the terminals is connected to a parallel circuit of the converter cells.

Abstract: An AC-AC converter circuit converts an AC voltage into a further AC voltage. A rectifier circuit rectifies the AC voltage. An inverter circuit generates the further AC voltage. AZ source circuit is provided between the rectifier circuit and the inverter circuit.

Abstract: The invention relates to a converter (K) for controlling power flows between at least three power networks (QAC, QHV, QNV) having different operating voltages (UA, UB, UC). The converter comprises at least three terminals (A, B, C), each of which is configured for electrically contacting one of the three power networks (QNV, QHV, QAC), and at least two converter cells (Z1, Z2), each having a transformer (T) having at least three transformer coils (W1,A, W1,B, W1,C, W2,A, W2,B, W2,C). At least one of the terminals (A, B, C) is connected to a series connection of converter cells (Z1, Z2), whereas at least one of the other terminals (A, B, C) is connected to parallel connection of converter cells (Z1, Z2) via a bidirectional serial line.

Abstract: An AC-AC power convertor converts a first AC voltage to a second AC voltage. A PFC rectifier circuit rectifies an AC voltage (vG) so as to generate a rectified voltage. An inverter generates the second AC voltage from the rectified voltage. A controller controls the PFC rectifier circuit and the inverter such that power generated by the first AC voltage and the pulsations of power generated by the rectified voltage are output to an external device.

Abstract: A non-contact power generator includes: a magnet disposed at a distance to a main surface of a moving body that moves in one direction and the opposite direction, and the magnet generating a magnetic flux passing the main surface; a coil being separated from a surface of the magnet that faces away from the main surface, the coil being linked with the magnetic flux from the magnet; and a magnetic flux guide member disposed in a part of a magnetic path of the magnetic flux linked with the coil. The magnet is moved along the shaft in the moving direction of the moving body at a speed lower than the speed of the moving body by a reaction force acting on the magnet on a basis of eddy currents generated in the main surface in such a direction as to hinder a change of the magnetic flux from the magnet.

Abstract: A circuit arrangement for controlling power transistors of a power converter includes a logic circuit configured to generate a pulse-width modulation (PWM) signal and a clock generator configured to generate a clock signal. A first and a second isolator are configured to galvanically isolate transmission of the PWM signal and the clock signal into a high-voltage portion of the power converter so as to produce a galvanically isolated PWM signal and a galvanically isolated clock signal. The first isolator for the PWM signal is configured transmit both DC voltage signals and AC voltage signals. A correction circuit is configured to correct jitter of the galvanically isolated PWM signal based on the galvanically isolated clock signal. The second isolator for the clock signal exhibits a jitter lower than that of the first isolator by a factor of at least two.

Abstract: Provided is a rotary electric machine including: a permanent magnet rotatable around a first rotational shaft and disposed at a distance from a main surface of a moving body rotating or moving, at least a part of a side surface of the permanent magnet continuous to an outer peripheral surface thereof being opposed to the main surface of the moving body, wherein the permanent magnet is rotated around the first rotational shaft by a reaction force acting on the permanent magnet, the reaction force being caused by eddy currents produced in the main surface of the moving body in such a direction as to hinder a change of magnetic flux from the permanent magnet, and a surface speed of the side surface of the permanent magnet opposed to the moving body is lower than a surface speed of the main surface of the moving body opposed thereto.

Abstract: A non-contact power generator includes: a magnet disposed at a distance to a main surface of a moving body that moves in one direction and the opposite direction, and the magnet generating a magnetic flux passing the main surface; a coil being separated from a surface of the magnet that faces away from the main surface, the coil being linked with the magnetic flux from the magnet; and a magnetic flux guide member disposed in a part of a magnetic path of the magnetic flux linked with the coil. The magnet is moved along the shaft in the moving direction of the moving body at a speed lower than the speed of the moving body by a reaction force acting on the magnet on a basis of eddy currents generated in the main surface in such a direction as to hinder a change of the magnetic flux from the magnet.

Abstract: A circuit arrangement for controlling power transistors of a power converter includes a logic circuit configured to generate a pulse-width modulation (PWM) signal and a clock generator configured to generate a clock signal. A first and a second isolator are configured to galvanically isolate transmission of the PWM signal and the clock signal into a high-voltage portion of the power converter so as to produce a galvanically isolated PWM signal and a galvanically isolated clock signal. The first isolator for the PWM signal is configured transmit both DC voltage signals and AC voltage signals. A correction circuit is configured to correct jitter of the galvanically isolated PWM signal based on the galvanically isolated clock signal. The second isolator for the clock signal exhibits a jitter lower than that of the first isolator by a factor of at least two.

Abstract: The invention relates to a switching device for switching a current between a first connection (1) and a second connection (2), comprising a series connection of at least two JFETs (J1-J6), of which a lowest JFET (J1) is connected to the first connection (1), or the lowest JFET (J1) is connected in a cascade circuit to the first connection (1) via a control switch (M), and at least one further JFET (J2-J5), which is connected in series to the lowest JFET (J1), wherein the JFET (J6) farthest away from the lowest JFET (J1) is referred to as the uppermost JFET (J6) and is connected with the drain connection to the second connection (2), and wherein a stabilization circuit (D11-D53) is connected between the gate connections of the JFETs (J1-J6) and the first connection (1) in order to stabilize the gate voltages of the JFETs (J1-J6).

Abstract: A switching device for switching a current between a first terminal (1) and a second terminal (2) comprises a cascode circuit having a series connection of a first semiconductor switch (M) and a second semiconductor switch (J), wherein the two semiconductor switches (M, J) are connected to each other by a common point (13), and the first semiconductor switch (M) is controlled by way of a first control input in accordance with a voltage between the first control input and the first terminal (1), and the second semiconductor switch (J) is controlled by way of a second control input (4) in accordance with a voltage between the second control input (4) and the common point (13). To this end, a control circuit having a specifiable capacitance (C) is connected between the second terminal (2) and at least one of the control input.