Abstract: To provide a controller and a control method which can estimate a temperature of the temperature estimation with good accuracy without depending on detection information of other sensors other than the temperature sensor, even if the temperature sensor is attached to a position away from the temperature estimation point. A controller is provided with a sensor temperature detector that detects a sensor temperature based on an output signal of a temperature sensor attached to a temperature estimation object; and a temperature estimator that calculates an estimated temperature of the temperature estimation point, based on the current detection value of sensor temperature or the current correction value of sensor temperature, the detection value of sensor temperature before the step time or the correction value of sensor temperature before the step time, and a thermal time constant.

Abstract: A memory system includes a memory controller, a non-volatile memory, and a power supply control circuit configured to receive power from an external power supply. The power supply control circuit includes a backup power supply, a first converter configured to supply power to the memory controller based on power supplied from the external power supply or the backup power supply, a second converter configured to supply power to the non-volatile memory based on power supplied from the external power supply or the backup power supply, and a discharge circuit configured to discharge the power remaining in the second converter based on power remaining in the backup power supply after the supply of power from the external power supply and the backup power supply is stopped.

Abstract: A semiconductor storage device according to an embodiment includes a board, a first semiconductor memory, a second semiconductor memory, a controller, and a wiring. The first semiconductor memory includes a first bonding member. The first semiconductor memory has a first corner, a second corner, a third corner, and a fourth corner. The second semiconductor memory includes a second bonding member. The second semiconductor memory has a fifth corner, a sixth corner, a seventh corner, and an eighth corner. The first bonding member is a first detection-bonding member. The first detection-bonding member detects a connection state of the first semiconductor memory and the second semiconductor memory. The second bonding member is a second detection-bonding member. The second detection-bonding member is electrically connected to the first detection-bonding member. The second detection-bonding member detects a connection state of the first semiconductor memory and the second semiconductor memory.

Abstract: A memory system includes a nonvolatile memory, a controller configured to control the nonvolatile memory, a power supply circuit that is connected to the controller and configured to generate a power supply voltage for the nonvolatile memory and the controller from a voltage supplied from at least one external power supply, and a power storage device that is connected to the power supply circuit and configured to charge to a first energy from a charging voltage supplied by the power supply circuit, and an energy sharing pin that is connected to the power supply circuit and the power storage device, and is connectable to an external power storage device in an external memory system.

Abstract: An object of the present disclosure is to provide a rotating electric machine in which a centrifugal force can be relaxed and reluctance torque can be improved. A pair of magnet slots are provided so as to be opposed to each other such that the distance therebetween is narrowed toward the radially inner side while being centered on a d axis of a rotor core, a pair of magnets are inserted in the pair of magnet slots, and center flux barriers are provided on the d axis between the pair of magnet slots. The distance in the radial direction between the first-layer center flux barrier and the second-layer center flux barrier is the smallest among distances between a flux barrier layer for first layer and a flux barrier layer for second layer.

Abstract: Provided is a rotating electric machine, including: a field magneton; and an armature. In terms of components in a radial direction of the field magneton of magnetic fluxes passing from the field magneton to the armature, a magnetic flux density at a center in an axial direction of the field magneton is lower than a magnetic flux density at an end in the axial direction of the field magneton.

Abstract: A controller for a rotary electric machine may include: at least one memory that stores a temperature prediction data in which a relationship among a rotational speed of a rotary electric machine, a torque information of the rotary electric machine, a temperature of the rotary electric machine at a reference time point, and a temperature of the rotary electric machine after an estimation calculation period elapses from the reference time point, and at least one processor that, at every estimation calculation period, sets the last calculation time before the estimation calculation period as the reference time point, and, by referring to the temperature prediction data, calculates an estimation value of temperature of the rotary electric machine after the estimation calculation period elapses from the last calculation time.

Abstract: A rotary electric machine comprises: a rotor which has a rotor core and permanent magnets arranged in the rotor core on its outer circumference side, and which is supported rotatably; and a stator which has a stator core having teeth projecting toward a radial center and arranged circumferentially, and which is located coaxially with the rotor to be spaced apart from the outer circumferential surface of the rotor; wherein, on a condition that a ratio of the circumferential width of each of sub poles to the circumferential width of each of main poles is 0.625 or less, a top width of each of the teeth is set on the basis of two calculation formulas to be used differently according to the rotor skew angle.

Abstract: A storage device according to an embodiment includes a housing, a first board, a memory, and a capacitor. The first board is housed in the housing. The memory is mounted on the first board. The capacitor is in contact with one of the housing and a second board. The capacitor is electrically connected to the first board. The second board is housed in the housing.

Abstract: A power supply circuit supplies a first voltage to a third terminal using a voltage of a first terminal, generates a second voltage using the first voltage, supplies the second voltage to a non-volatile memory, generates a third voltage using the first voltage, charges energy in a capacitor, upon the voltage of the first terminal being lower than a first threshold voltage and a voltage of the second terminal being higher than a second threshold voltage, supplies a fourth voltage using charged energy to the third terminal, and upon the voltage of the second terminal being lower than the second threshold voltage, stops charging and supplies a fifth voltage using the charged energy to the third terminal.

Abstract: A memory system includes a nonvolatile memory, a controller configured to control the nonvolatile memory, a power supply circuit that is connected to the controller and configured to generate a power supply voltage for the nonvolatile memory and the controller from a voltage supplied from at least one external power supply, and a power storage device that is connected to the power supply circuit and configured to charge to a first energy from a charging voltage supplied by the power supply circuit, and an energy sharing pin that is connected to the power supply circuit and the power storage device, and is connectable to an external power storage device in an external memory system.

Abstract: To provide a controller and a control method which can estimate a temperature of the temperature estimation with good accuracy without depending on detection information of other sensors other than the temperature sensor, even if the temperature sensor is attached to a position away from the temperature estimation point. A controller is provided with a sensor temperature detector that detects a sensor temperature based on an output signal of a temperature sensor attached to a temperature estimation object; and a temperature estimator that calculates an estimated temperature of the temperature estimation point, based on the current detection value of sensor temperature or the current correction value of sensor temperature, the detection value of sensor temperature before the step time or the correction value of sensor temperature before the step time, and a thermal time constant.

Abstract: Provided is a rotating electric machine, including a rotor, the rotor including: a rotor core; a first permanent magnet inserted into a first magnet slot; and a second permanent magnet inserted into a second magnet slot. The rotor core includes an inter-pole hole portion formed between the first magnet slot and the second magnet slot. When a circle having a rotation axis as a center and circumscribing an edge portion of each of the first magnet slot and the second magnet slot on the stator side is defined as a first circle, the inter-pole hole portion is arranged on a side opposite to the stator with respect to the first circle, and an edge portion of the inter-pole hole portion on the stator side is formed along the first circle.

Abstract: To provide a controller for AC rotary electric machine which can reduce an electromagnetic exciting force in the execution region of the magnetic flux weakening control. A controller for AC rotary electric machine, in a specific operating region which is set in an operating region of the magnetic flux weakening control, increases a maximum value of amplitude of fundamental wave components of applied voltages applied to windings more than a normal operating region other than the specific operating region; and calculates dq-axis current command values by the magnetic flux weakening control, in a condition in which the maximum value of amplitude of the fundamental wave components of the applied voltages is increased.

Abstract: A power supply circuit supplies a first voltage to a third terminal using a voltage of a first terminal, generates a second voltage using the first voltage, supplies the second voltage to a non-volatile memory, generates a third voltage using the first voltage, charges energy in a capacitor, upon the voltage of the first terminal being lower than a first threshold voltage and a voltage of the second terminal being higher than a second threshold voltage, supplies a fourth voltage using charged energy to the third terminal, and upon the voltage of the second terminal being lower than the second threshold voltage, stops charging and supplies a fifth voltage using the charged energy to the third terminal.

Abstract: To provide a controller for rotary electric machine which can estimate a transitional temperature with good accuracy, while considering the heating amount and the heat radiation amount due to copper loss and iron loss which change according to the operating point of rotational speed and torque, and suppressing the increase in arithmetic load. A controller for rotary electric machine, at calculation timing of every estimation calculation period, by referring to a temperature prediction data in which a relationship among a rotational speed, a torque information, a temperature at a reference time point, and a temperature after lapse of the estimation calculation period from the reference time point, calculates an estimation value of temperature after lapse of the estimation calculation period from the last time calculation timing, corresponding to the present rotational speed, the present torque information, and the estimation value of temperature calculated at the last time calculation timing.

Abstract: To provide a controller for AC rotary electric machine which can reduce an electromagnetic exciting force in the execution region of the magnetic flux weakening control. A controller for AC rotary electric machine, in a specific operating region which is set in an operating region of the magnetic flux weakening control, increases a maximum value of amplitude of fundamental wave components of applied voltages applied to windings more than a normal operating region other than the specific operating region; and calculates dq-axis current command values by the magnetic flux weakening control, in a condition in which the maximum value of amplitude of the fundamental wave components of the applied voltages is increased.

Abstract: According to one embodiment, a semiconductor storage device includes a board, a semiconductor memory component, and a capacitor. The hoard includes a first pad and a second pad. The first capacitor includes a first electrode and a second electrode. The first pad includes a first region and a second region. A direction from the first pad to the second pad is a first direction and a direction different from the first direction is a second direction. A difference between a dimension of the second region in the second direction and a dimension of the first electrode in the second direction is smaller than a difference between a dimension of the first region in the second direction and a dimension of the first electrode in the second direction.

Abstract: A memory system includes a non-volatile memory, a controller that controls writing of data to the non-volatile memory, a power supply circuit that is connected to the non-volatile memory and the controller and generates a plurality of power supply voltages using an external voltage, and at least one capacitor that stores energy that is charged by a charge voltage. The charge voltage is one of the plurality of power supply voltages generated by the power supply circuit. A capacitance of the at least one capacitor is detected and then a value of the charge voltage is set according to the detected capacitance of the at least one capacitor.

Abstract: A memory system includes a substrate extending in a first direction and including first and second portions that are arranged along a line in the first direction, terminals disposed on the first portion, electronic components mounted on the second portion and including a nonvolatile memory and a controller configured to control the nonvolatile memory, and an encapsulating member that encapsulates the second portion and the electronic components.