Abstract: Magnetic flux generated when a current flows through a main circuit wiring serves as disturbance of a magnetic sensor, and accurate rotor position information is obtained.

Abstract: The purpose of the present invention is not only to reduce ripple current but also to improve operation efficiency by reducing heat generation. When n is defined as an integer of 2 or more, a motor control device of the present invention drives n sets of windings by n sets of inverters. The motor control device is characterized in that when said n sets of inverters output high power, at least one or more of said n sets of inverters are set to have an output duty cycle of 100%.

Abstract: An object of the invention is to simultaneously solve a miniaturization and an improvement of productivity of a power conversion device, a temperature rise suppression of a smoothing capacitor, and a reduction of motor noises. The power conversion device of the invention includes a smoothing capacitor, a first power conversion unit and a second power conversion unit which are connected in parallel, and a control unit which generates a PWM pulse on the basis of an output voltage vector and a PWM carrier. The control unit includes a correction unit which corrects a predetermined output voltage vector value to two or more different output voltage vector values such that an average value in one period of the PWM carrier becomes the predetermined output voltage vector value. The correction unit corrects a first output voltage vector value in a first period, and corrects a second output voltage vector value in a second period different from the first period.

Abstract: Provided is an electric drive device in which heat-dissipating sections (15A) (15B) that transfer at least heat generated by a power supply circuit unit (17) and power conversion circuit units (16) to a motor housing (11) are formed on an end surface section (15) of the motor housing (11) on the opposite side from an output section of a rotating shaft (23) of an electric motor. In addition, a watertight lid member (35) that covers a through hole (41) through which the rotating shaft passes and the end of the rotating shaft (23) from the exterior is attached to the end surface section (15) around the through hole (41), and a waterproof breathable membrane (44) that prevents the passage of moisture while allowing the passage of air and water vapor is provided to part of the watertight lid member.

Abstract: In an electric drive device, a motor housing includes an end face part opposite to an output part of a rotating shaft of a motor. An electronic control part is arranged at the end face part of the motor housing, and includes a control circuit part, a power supply circuit part, and a power conversion circuit part. The power conversion circuit part is mounted to a power conversion part heat dissipation region of the end face part of the motor housing. The power supply circuit part is mounted to a power supply part heat dissipation region of the end face part of the motor housing. A power conversion circuit part holder is attached to a portion of the end face part around the rotating shaft, and includes a resilient function member structured to press and hold the power conversion circuit part on the power conversion part heat dissipation region.

Abstract: An object of the present invention is to provide a power module that secures a heat dissipation route and has increased reliability. A power module of the present invention includes a first circuit body having a first semiconductor element and a first conductor portion, a second circuit body having a second semiconductor element and a second conductor portion, a resin sealing material for sealing the first circuit body and the second circuit body, and a warpage suppression portion that is formed along an array direction of the first circuit body and the second circuit body and is formed to have greater rigidity than a sealing portion of the resin sealing material, wherein the warpage suppression portion is formed of the same material as a resin member of the resin sealing material and is formed to be thicker than the sealing portion of the resin sealing material.

Abstract: An inverter (300) is disposed toward an opening in a motor side metal housing (201). A power module (301) is disposed on a metal cover (207) that is in contact with the metal housing (201). The power module (301) includes a semiconductor element, a metal terminal connected to the semiconductor element, and resin that seals the semiconductor element and the metal terminal. A metal plate (306) is disposed on a surface of the power module (301) that is positioned opposite the metal cover (207). Heat generated by the power module (301) is dissipated from the metal cover (207) and from the metal plate (306). This improves the heat dissipation performance. Thus, the size of the power module can be reduced.

Abstract: Magnetic flux generated when a current flows through a main circuit wiring serves as disturbance of a magnetic sensor, and accurate rotor position information is obtained.

Abstract: An object of the invention is to simultaneously solve a miniaturization and an improvement of productivity of a power conversion device, a temperature rise suppression of a smoothing capacitor, and a reduction of motor noises. The power conversion device of the invention includes a smoothing capacitor, a first power conversion unit and a second power conversion unit which are connected in parallel, and a control unit which generates a PWM pulse on the basis of an output voltage vector and a PWM carrier. The control unit includes a correction unit which corrects a predetermined output voltage vector value to two or more different output voltage vector values such that an average value in one period of the PWM carrier becomes the predetermined output voltage vector value. The correction unit corrects a first output voltage vector value in a first period, and corrects a second output voltage vector value in a second period different from the first period.

Abstract: An object of the present invention is to provide a power module that secures a heat dissipation route and has increased reliability. A power module of the present invention includes a first circuit body having a first semiconductor element and a first conductor portion, a second circuit body having a second semiconductor element and a second conductor portion, a resin sealing material for sealing the first circuit body and the second circuit body, and a warpage suppression portion that is formed along an array direction of the first circuit body and the second circuit body and is formed to have greater rigidity than a sealing portion of the resin sealing material, wherein the warpage suppression portion is formed of the same material as a resin member of the resin sealing material and is formed to be thicker than the sealing portion of the resin sealing material.

Abstract: An object of the present invention is to reduce an inductance of a power circuit, reduce a switching loss and a noise level and improve a voltage-use ratio of a battery power in a redundant-type electronic control device. An electronic control device that controls a motor has power modules 11a, 11b to drive the motor. Power terminals 32pua, 32pva and 32pwa of the power module 11a are arranged in positions that are close to and face power terminals 32nub, 32nvb and 32nwb of the power module 11b, which are opposite to the power terminals 32pua, 32pva and 32pwa of the power module 11a in polarity. Power terminals 32nua, 32nva and 32nwa drawn from a longitudinal end portion 311 of the power module 11a are arranged in positions that are close to and face power terminals 32pub, 32pvb and 32pwb drawn from a longitudinal end portion 311 of the power module 11b which are opposite to the power terminals 32nua, 32nva and 32nwa of the power module 11a in polarity.

Abstract: The purpose of the present invention is not only to reduce ripple current but also to improve operation efficiency by reducing heat generation. When n is defined as an integer of 2 or more, a motor control device of the present invention drives n sets of windings by n sets of inverters. The motor control device is characterized in that when said n sets of inverters output high power, at least one or more of said n sets of inverters are set to have an output duty cycle of 100%.

Abstract: Disclosed is a power conversion apparatus that improves the reliability of a redundant system therefor. The power conversion apparatus includes a motor having a cylindrical motor case, a multi-phase stator, and a rotor, a power conversion section that switches the supply of electrical power to the motor, a control circuit board that controls the power conversion section, and a cover made of metal on which the power conversion section and the control circuit board are mounted. The power conversion section includes a first power conversion section and a second power conversion section. The cover includes a protrusion that protrudes toward the motor from a surface substantially parallel to the radial direction of the motor. The protrusion is formed in such a manner as to separate the first and second power conversion sections from each other.

Abstract: Disclosed is a power conversion apparatus that improves the reliability of a redundant system therefor. The power conversion apparatus includes a motor having a cylindrical motor case, a multi-phase stator, and a rotor, a power conversion section that switches the supply of electrical power to the motor, a control circuit board that controls the power conversion section, and a cover made of metal on which the power conversion section and the control circuit board are mounted. The power conversion section includes a first power conversion section and a second power conversion section. The cover includes a protrusion that protrudes toward the motor from a surface substantially parallel to the radial direction of the motor. The protrusion is formed in such a manner as to separate the first and second power conversion sections from each other.

Abstract: An inverter (300) is disposed toward an opening in a motor side metal housing (201). A power module (301) is disposed on a metal cover (207) that is in contact with the metal housing (201). The power module (301) includes a semiconductor element, a metal terminal connected to the semiconductor element, and resin that seals the semiconductor element and the metal terminal. A metal plate (306) is disposed on a surface of the power module (301) that is positioned opposite the metal cover (207). Heat generated by the power module (301) is dissipated from the metal cover (207) and from the metal plate (306). This improves the heat dissipation performance. Thus, the size of the power module can be reduced.

Abstract: An inverter is offered which has a substrate having a capacitor, a semiconductor device, and so on mounted thereon, a metal enclosure securely holding the substrate, and a choke coil of an open magnetic path structure. The choke coil has a rod-like core disposed perpendicularly to the substrate. The choke coil is electrically connected with the substrate via coil terminals on a coil element. At least one cutout is formed in a surface of the substrate which is located opposite to one axial end (lower end) of the rod-like core of the choke coil.

Abstract: It is an object of the present invention to analyze heat transfers with a high degree of precision at a computation cost within a realistic range for a large-scale object such as an entire power-electronic system. In order to solve the problems described above, the present invention provides a numerical analysis system based mainly on a configuration for dividing the analysis area into at least two division areas, for analyzing at least one of the division areas by adoption of a finite element method or a boundary element method and for carrying out an analysis by adoption of a technique based on equivalent circuit approximation for at least one of the other division areas.

Abstract: In related art technique, an average neutral point voltage is detected via a low-pass filter. Time constant of the low-pass filter must be set to cover the entire output frequency band of an inverter and voltage fluctuation due to modulated signal must be separated from that due to a short circuit to ground. According to the present invention, whether abnormality such as a short circuit to ground or to supply occurs in output lines can be determined based on an actual neutral point voltage of a motor, which changes in a stepwise fashion in conformity to a PWM pulse pattern output by an inverter device, and a normal neutral point voltage which depends on a PWM pattern output by the inverter device. Highly reliable abnormality detection in accordance with the waveform of the neutral point voltage and stable abnormality detection not depending on the inverter output frequency are feasible.

Abstract: A semiconductor device formed by using semiconductor packages is provided. The semiconductor device includes two semiconductor packages adjacently arranged in opposite directions on an inductive conductor. Terminals of the two semiconductor packages are joined by a third lead. The third lead is arranged substantially in parallel to the inductive conductor. Leads at the joint portions have, for example, a bent structure, and the third lead is arranged to be close to the inductive conductor.

Abstract: A semiconductor device formed by using semiconductor packages is provided. The semiconductor device includes two semiconductor packages adjacently arranged in opposite directions on an inductive conductor. Terminals of the two semiconductor packages are joined by a third lead. the third lead is arranged substantially in parallel to the inductive conductor. Leads at the joint portions have, for example, a bent structure, and the third lead is arranged to be close to the inductive conductor.