Abstract: A DC power supply (1) having a series regulator (2) for generating a fixed output DC voltage (VCC) at a variable input AC voltage (VAC) with low power loss. For this purpose, the DC power supply (1, 101, 201, 301) has a transformer (3, 103) having at least two auxiliary windings (W1, W2) having different numbers of windings that can each be connected via a switching device (4, 104, 204, 304) to the series regulator (2). Switching is effected such that the power loss is kept as low as possible.

Abstract: A drive unit for an actuator having an electric motor, wherein the drive unit comprises a gear train having at least a first gear stage and a last gear stage, wherein the gear train realizes a transmission ratio of greater than one from the electric motor to an output wheel, wherein each gear stage is formed by a gear drive and wherein in the last gear stage, one gear wheel or alternatively two gear wheels connected in parallel are provided that each mesh with an upstream gear wheel of the gear train and with the output wheel, so as to transmit the torque acting on the last gear stage to this stage via the one gear wheel or alternatively distributed over the two gear wheels connected in parallel, wherein the drive unit is accommodated in a housing of the actuator that has at least a first and a second bearing support for the gear wheels of the last gear stage, and to form this last gear stage, the two bearing supports are fitted with the one gear wheel or alternatively with the two gear wheels connected in pa

Abstract: A disk rotating motor is provided with: a bearing that rotatably supports a shaft on an outer-diameter side of the shaft; and a stator core that is fixed to an outer peripheral surface of the bearing. The stator core includes first and second plates laminated in an extension direction of the shaft. The first plate includes: a laminate laminated on the second plate in the extension direction of the shaft; and a bend bent from the laminate toward the second plate on an inner-diameter side of the laminate, the bend being in contact with the outer peripheral surface of the bearing.

Abstract: A spread illuminating apparatus includes a light guide plate in which two side end surfaces that oppose each other are incident light surfaces and one of two principal surfaces that oppose each other is an emitting surface; and a pair of light sources that are respectively arranged along the two incident light surfaces of the light guide plate and that are alternately illuminated, wherein light absorbers are formed in regions toward the incident light surfaces of one or both of the principal surfaces of the light guide plate.

Abstract: A disk rotating motor is provided with: a stator including a stator core and a bracket for fixing the stator core; a rotor that can be rotated with respect to the stator and includes a shaft; and a bearing that rotatably supports the rotary shaft on the outer diameter side of the rotary shaft. The bracket includes a cylindrical portion extending along the shaft and a folded portion formed by folding the upper end of the cylindrical portion onto the outer diameter side. The bearing is fixed to the inner circumferential surface of the cylindrical portion whereas the stator core is fixed to the outer peripheral surface of the folded portion.

Abstract: A down converter for converting an input DC voltage (Vin) into a lower output DC voltage (Vout). The down converter has on the primary side (2) an LC series resonance circuit (4) that can be connected via a first switch (S1) to the input voltage (Vin) and via a second switch (S2) to ground. On the secondary side (3), an output switch (S3) and an output capacitor (C) are each connected in parallel to the DC voltage output (Vout) and connected to each other through an inductor (L). The output switch (S3) is connected via a diode (Dr) to the input voltage (Vin) so as to divert voltage overshoots.

Abstract: A motor includes poles P having a remanence Mr of 0.9 T or more, a coercivity HcJ of 0.80 MA/m or more, and a maximum energy product (BH)max of 150 kJ/m3 or more, which sets a center point Pc of the magnetic poles in a circumferential direction on a rotor outer circumferential surface to a maximum thickness tmax, wherein when a line connecting the Pc and a rotational axis center Rc is Pc-Rc, a straight line connecting an arbitrary point Px in the circumferential direction on the rotor outer circumferential surface and the Rc is Px-Rc, an apex angle of the lines Pc-Rc and Px-Rc is ?, a number of pole pairs is Pn, a circumferential direction magnetic pole end is Pe, and a magnetic pole end biasing distance ?LPe of the circumferential direction magnetic pole ends Pe is ?×tmax (? is a coefficient).

Abstract: A system configured to provide cooling of electronic equipment in a shelter in combination with an air conditioning (A/C) system. The system includes one or more blowers fur drawing air into the shelter, a damper arrangement for controlling air exhaust. The system further includes a DC powered controller coupled to the one or more blowers, the damper arrangement, and the A/C system. The controller is configured to receive at least a first analog input signal associated with a shelter-interior temperature, a second analog input signal associated with a shelter-exterior temperature, and a plurality of alarm input signals and to generate the one or more first control signals to control blower rotational speed, the second control signal to open/close the damper arrangement, and a third control signal to inhibit/activate the A/C system based on at least the first analog input signal, or the second analog input signal, or a plurality of alarm input signals, or a combination of these.

Abstract: A system configured to provide cooling of electronic equipment in a shelter in combination with an air conditioning (A/C) system. The system includes one or more blowers for drawing air into the shelter, a damper arrangement for controlling air exhaust. The system further includes a DC powered controller coupled to the one or more blowers, the damper arrangement, and the A/C system. The controller is configured to receive at least a first analog input signal associated with a shelter-interior temperature, a second analog input signal associated with a shelter-exterior temperature, and a plurality of alarm input signals and to generate the one or more first control signals to control blower rotational speed, the second control signal to open/close the damper arrangement, and a third control signal to inhibit/activate the A/C system based on at least the first analog input signal, or the second analog input signal, or a plurality of alarm input signals, or a combination of these.