Abstract: A motor drive device is capable of allowing a user to surely recognize that effect when a cutting fluid adheres to a casing. The motor drive device includes an electronic component and a casing that houses the electronic component. A part of the casing changes color when coming in contact with a cutting fluid and the casing may change to different colors based on the concentration of the cutting fluid.

Abstract: A motor drive system enabling detection of cutting fluid deposited at a housing of electronic components. A housing holding electronic components of a motor drive system has top faces slanted with respect to the horizontal plane so as to guide the deposited cutting fluid. The housing further includes storage parts collecting the cutting fluid guided along the top faces. The storage parts may be graduated so as to enable the collected amount of the cutting fluid to be measured. The storage parts may be configured to be detachable from the housing.

Abstract: A motor drive apparatus in which a main power supply used for motor drive is supplied via a magnetic contactor includes: a monitoring unit that monitors a main power supply voltage at an AC power supply input side of the magnetic contactor in a state in which contacts of the magnetic contactor are opened; a determination unit that determines whether the main power supply voltage monitored by the monitoring unit is normal; and a magnetic contactor control unit that outputs a command that controls opening and closing of contacts of the magnetic contactor, wherein when it is determined by the determination unit that the main power supply voltage is abnormal, the magnetic contactor control unit maintains an output of an open command such that the contacts of the magnetic contactor are opened.

Abstract: A single crystal pulling apparatus including: a remelting detection apparatus which detects that remelting of a lower end portion of the semiconductor single crystal is completed from a change in weight of the semiconductor single crystal when the lower end portion of the semiconductor single crystal is immersed in the melt to be remolten by using the wire; and a lowermost end detection apparatus which detects a lowermost end of the semiconductor single crystal from a position where no current flows between the semiconductor single crystal and the melt when the semiconductor single crystal is taken up with the use of the wire while applying a voltage between the semiconductor single crystal and the melt by applying a voltage between the crucible and the wire.

Abstract: A scroll compressor includes a fixed scroll, an orbiting scroll, a suction section, a discharge section, and an electric motor. A sliding surface of a scroll is formed outside a wrap with a depression section depressed with respect to a sliding surface and a flange section elevated with respect to the depression section. The flange section is a remaining region in a protruding region disposed outside a referential perfect circle, the remaining region being other than a region continuing to an end of an involute curve of a scroll formed with the flange section, the referential perfect circle having a radius set to a distance between the center of the scroll formed with the flange section and the end of the involute curve. The scroll compressor enhances reduction of the sliding loss with a simple structure and reduction of the refrigerant leakage loss in the entire compression chambers.

Abstract: A motor driving device is equipped with a narrow pitch component group made up from a plurality of narrow pitch components having a plurality of terminals, and in which an interval between the plurality of terminals is less than or equal to a predetermined distance, a heat generating component group made up from a plurality of heat generating components, which are components other than the narrow pitch components, and which generate heat greater than or equal to a predetermined amount, a fan configured to blow wind onto the heat generating component group in order to cool the heat generating component group, and a printed board on which the narrow pitch component group is mounted in a manner so that wind is not blown onto the narrow pitch component group by the fan.

Abstract: The present invention has an object of providing a motor drive device provided with a cooling mechanism by way of a fan motor, which is capable of also cooling separate elements in the surroundings of a heat generating element due to further improving the cooling function. The motor drive device is equipped with a fan motor, and a heat sink which cools the heat generating element on a printed substrate by way of exchanging heat with the heat generating element, in which the heat sink includes a main body of cylindrical shape fixed to the heat generating element, and having an air duct through which cooling airflow flows, and a communication hole that communicates from an exposed outer circumferential face of the main body to the air duct, and in which the fan motor generates cooling airflow that flows through the air duct.

Abstract: A single-crystal manufacturing apparatus including: at least two different melt surface position measuring means for measuring a melt surface position of a material melt; controlling means for controlling the melt surface position based on the measured melt surface position; and determining means for determining whether a measurement abnormality has occurred in the melt surface position measuring means, the apparatus being characterized in that the melt surface position is measured by the plurality of melt surface position measuring means at the same time, one melt surface position measuring means adopted for control over the melt surface position is selected from the plurality of melt surface position measuring means, and the melt surface position measuring means adopted for control over the melt surface position is switched to another melt surface position measuring means when the determining means determines that a measurement abnormality has occurred in the selected melt surface measuring means.

Abstract: A cooling structure includes a phosphor unit, air-blowing systems that cause cooling air to flow, and a duct structure. The phosphor unit includes a substrate and a phosphor that is formed on the substrate and that emits fluorescent light when irradiated with excitation light. The duct structure guides the cooling air blown from the air-blowing systems to the phosphor unit.

Abstract: A structure for cooling a semiconductor element includes an element body and a lead terminal extending from one surface of the element body in a direction intersecting the one surface. The semiconductor element cooling structure includes a heat sink. The heat sink includes a contact surface that is in contact with the one surface of the element body, a through-hole which is formed in the contact surface and through which the lead terminal passes, and a space portion that communicates with the through-hole and that is configured to house a substrate connected to the lead terminal.

Abstract: A display device is provided with a plurality of solid-state light sources (101-103) and a coolant-circulating means (100) that is equipped with a flow path (100a) formed to pass through each of the solid-state light sources (101-103) and that circulates a coolant via the flow path (100a). Each of the solid-state light sources (101-103) has the property that the luminance thereof changes in response to a temperature change. The flow path (100a) is formed such that the coolant first passes through solid-state light sources having a greater degree of luminance change according to the above-described property of the solid-state light sources (101-103).

Abstract: A single crystal pulling apparatus including: a remelting detection apparatus which detects that remelting of a lower end portion of the semiconductor single crystal is completed from a change in weight of the semiconductor single crystal when the lower end portion of the semiconductor single crystal is immersed in the melt to be remolten by using the wire; and a lowermost end detection apparatus which detects a lowermost end of the semiconductor single crystal from a position where no current flows between the semiconductor single crystal and the melt when the semiconductor single crystal is taken up with the use of the wire while applying a voltage between the semiconductor single crystal and the melt by applying a voltage between the crucible and the wire.

Abstract: A vehicle brake fluid pressure control apparatus includes a control unit including a memory part for storing a valve closing map which shows a relationship between a differential pressure between an upstream side and a downstream side of a pressure regulator valve and an output current value for closing the pressure regulator valve and a valve opening map which shows a relationship between the differential pressure and an output current value for opening the pressure regulator valve. The control unit executes a current value switching control in which the output current value of the valve closing map is changed to that of the valve opening map and thereafter, the output current of the valve opening map is changed to an output current value which lies somewhere between the output current values of the valve closing map and the valve opening map.

Abstract: A motor drive apparatus in which a main power supply used for motor drive is supplied via a magnetic contactor includes: a monitoring unit that monitors a main power supply voltage at an AC power supply input side of the magnetic contactor in a state in which contacts of the magnetic contactor are opened; a determination unit that determines whether the main power supply voltage monitored by the monitoring unit is normal; and a magnetic contactor control unit that outputs a command that controls opening and closing of contacts of the magnetic contactor, wherein when it is determined by the determination unit that the main power supply voltage is abnormal, the magnetic contactor control unit maintains an output of an open command such that the contacts of the magnetic contactor are opened.

Abstract: A motor drive system enabling detection of cutting fluid deposited at a housing of electronic components. A housing holding electronic components of a motor drive system has top faces slanted with respect to the horizontal plane so as to guide the deposited cutting fluid. The housing further includes storage parts collecting the cutting fluid guided along the top faces. The storage parts may be graduated so as to enable the collected amount of the cutting fluid to be measured. The storage parts may be configured to be detachable from the housing.

Abstract: A method for calculating a height position of a silicon melt surface at the time of pulling a CZ silicon single crystal is disclosed, including: obtaining a first crystal diameter measured from a fusion ring on a boundary of the silicon melt and the silicon single crystal by using a CCD camera installed at an arbitrary angle relative to the silicon single crystal, and a second crystal diameter measured by using two CCD cameras installed parallel to both ends of a crystal diameter of the silicon single crystal; and calculating the height position of the silicon melt surface in the crucible during pulling of the silicon single crystal from a difference between the first crystal diameter and the second crystal diameter. As a result, a method for enabling further accurately calculating a height position of a silicon melt surface at the time of pulling a silicon single crystal is provided.

Abstract: A cooling structure for an illumination optical system includes: a fluorescent unit having a fluorescent layer that emits fluorescent light due to excitation light radiated from a light source; a fan for blowing cooling air to the fluorescent unit; and a duct that partitions an internal space and an external space, the internal space having the fluorescent unit disposed therein, and that guides the cooling air blown from the fan to the fluorescent unit.

Abstract: A motor drive device is capable of allowing a user to surely recognize that effect when a cutting fluid adheres to a casing. The motor drive device includes an electronic component and a casing that houses the electronic component. A part of the casing changes color when coming in contact with a cutting fluid and the casing may change to different colors based on the concentration of the cutting fluid.

Abstract: A cooling structure includes a phosphor unit, air-blowing systems that cause cooling air to flow, and a duct structure. The phosphor unit includes a substrate and a phosphor that is formed on the substrate and that emits fluorescent light when irradiated with excitation light. The duct structure guides the cooling air blown from the air-blowing systems to the phosphor unit.

Abstract: A light source apparatus according to the present invention includes a circuit board; a light source mounted on the circuit board; a first temperature measurement element that measures an ambient temperature of the circuit board and outputs a first signal that represents the measured result; a second temperature measurement element that measures a temperature of the circuit board and outputs a second signal that represents the measured result; and a light source drive control section that controls driving of the light source. The light source drive control section does not drive the light source if the temperature represented by the second signal is lower than the temperature represented by the first signal.