Abstract: A power supply apparatus includes: an AC generator including an AC generating section, and a rectifier for rectifying an AC voltage generated in the AC generating section, and outputting a DC voltage; and a DC/DC converter for converting the output voltage of the rectifier into a DC voltage having a different voltage value, wherein the output voltage of the rectifier is set to be larger than the output voltage of the DC/DC converter in accordance with the rotation speed of the AC generating section and the amount of power supply to an electrical load connected to the DC/DC converter, and is stepped down and outputted by using the DC/DC converter. The power supply apparatus is capable of increasing an output power efficiently.

Abstract: A power supply apparatus includes: an AC generator including an AC generating section, and a rectifier for rectifying an AC voltage generated in the AC generating section, and outputting a DC voltage; and a DC/DC converter for converting the output voltage of the rectifier into a DC voltage having a different voltage value, wherein the output voltage of the rectifier is set to be larger than the output voltage of the DC/DC converter in accordance with the rotation speed of the AC generating section and the amount of power supply to an electrical load connected to the DC/DC converter, and is stepped down and outputted by using the DC/DC converter. The power supply apparatus is capable of increasing an output power efficiently.

Abstract: The long side of a rectangular first separator plate of a fuel cell is divided into n equal area smaller rectangular parts so that the long sides of the rectangular parts are not larger than 2½ and not smaller than ½½ the length of the short sides. Through holes pass through a stack of plates substantially at centers of the smaller rectangles. Bolts having an annular elastic member at one end pass through the through holes, and the stack is clamped together.

Abstract: A power supplying apparatus for automotive parts can prevent not only wasteful power consumption even if an electric heater is short-circuited, but also any adverse effects on engine operation during an engine start-up operation. To this and, a heater 3 is connected to a power supply means P for heating the automotive parts. A switch 5 is connected between the power supply means P and the heater 3 for selectively switching on and off the power supply from the power supply means P to the heater.

Abstract: A charging generator for a vehicle comprises a three-phase a.c. generator in which first and second armature windings are provided so that the waveforms of the a.c. voltages produced in the first and second windings have a phase difference of 30.degree. in electrical angle, each of the output voltages are rectified in each rectifier, and the output side of the rectifiers are connected in parallel so that the output voltages are composed, whereby the height of ripple of the produced d.c. voltage can be reduced.

Abstract: A power supply apparatus for a vehicle includes an alternator for generating an output voltage for charging a first battery and a second battery having a higher voltage than the first battery. The output voltage of the alternator is controlled by a voltage regulator in accordance with the rotational speed of the alternator. When the rotational speed is in a low speed range, the voltage regulator controls the output voltage of the alternator to a first value suitable for charging the first battery. When the rotational speed is in a high speed range, the voltage regulator controls the output voltage of the alternator to a second value higher than the first value and suitable for charging the second battery. The output voltage of the alternator is switched between the first value and the second value at a rotational speed at which the output power of the alternator at the first output voltage equals the output power at the second output voltage.

Abstract: An alternating current generator for vehicles in which the exciting current flowing in the field winding (2) is detected and the current thus detected is suppressed not to exceed the maximum exciting current under the hot condition by the field current limiting circuit (5) for aiming at eliminating the generation of the maximum output under the cold condition to reduce the size of a pulley to result in a reduced vehicle weight and preventing the variation of the maximum output characteristic under the hot condition.

Abstract: A charging generator charges a battery by a voltage output from a generating unit having an armature coil and a field coil. The generator comprises a voltage boost/drop circuit connected between the output of the generator unit and the battery; a first control circuit connected between the field coil of the generating unit and the battery for controlling a field current flowing through the field coil to regulate a voltage generated in the armature coil of the generating unit in response to a voltage across the battery; and a second control circuit connected to the voltage boost/drop circuit for controlling the boost/drop ratio of the voltage boost/drop circuit.

Abstract: A voltage regulator circuit for an AC generator having two distinct DC output voltage levels is disclosed, which comprises a full-wave rectifier circuit for rectifying the AC voltages induced in the armature winding of the generator, and a change-over switch which selectively couples the battery and a high voltage load across the output terminals of the rectifier circuit, the negative output terminal of which is grounded. Further, a serial connection of three resistors is coupled across the positive terminal of the rectifier circuit and ground and a rectifier diode is coupled across the positive terminal of the field winding and a junction between the intermediate resistor and the extreme resistor coupled to the positive terminal of the rectifier circuit, the forward direction of the diode being directed from the positive to the negative terminal of the battery in the serial circuit formed by the diode, the intermediate resistor, and the other extreme resistor.

Abstract: In an engine starting and charging device mounted between an engine body and a clutch, major parts of the clutch 16 are disposed in a recess 25 formed in the axial direction in the end of the revolving-field pole 102a on the clutch side, to decrease the axial length from the engine to the clutch.

Abstract: A field coil is divided into the plural number, and each of these field coils is connected in parallel in relation to a battery at the time of engine starting, and in series during the generation of the electric current after engine starting, so that sufficient field electromotive force can be maintained in the event of a battery voltage drop during engine starting, and also a necessary, sufficient field electromotive force can be produced with little current at the time of voltage recovery during generator operation. Consequently, the amount of copper to be used for the field coils and a winding space can be decreased; therefore the present invention is effective to provide a light-weight, small and unexpensive engine starting and charging device.

Abstract: An alternator for a vehicle includes a stator mounted on the inner periphery of first and second bowl-like brackets separated by a plane perpendicularly crossing an output shaft, and a core integrally fixed to the shaft and surrounded by the first and second brackets, wherein the shaft is supported at the substantially central portions of the first and second brackets. The improvement comprises upper and lower flanges formed at the outer periphery of the first bracket in such a manner as to extend both parallel to the shaft, and perpendicular, in a direction tangent to the outer periphery of the first bracket, and elongated mounting bolts for fixing the alternator to the vehicle engine at the upper and lower flanges through mounting holes formed through the upper and lower flanges. This tends to isolate the rotor from engine vibration.

Abstract: A charging generator having a rectifier within a casing and an output terminal which is connected to the rectifier and projects radially with respect to a rotary shaft comprises: a terminal screw having a threaded shaft portion which constitutes the output terminal, a mounting arm portion formed integral with the threaded shaft portion, and a mounting bore provided in the mounting arm portion, the central axis of the mounting bore extending parallel with the axis of the threaded shaft portion; an output terminal base made of an insulating resin material which covers the mounting arm portion in such a manner that the mounting bore is not closed therewith, the base being formed integral with the terminal screw; an opening formed in the casing at a position which faces the rectifier so as to accommodate the output terminal base; and a screw inserted through the mounting bore in the terminal screw to connect the terminal screw, together with the output terminal base, to the rectifier.

Abstract: A controller for an AC power generator in vehicles having a rectifier for rectifying an AC output of an AC power generator equipped with a field coil, a battery charged with a rectified output of the rectifier, and a voltage regulator for adjusting an output voltage of the AC power generator by controlling a current flowing through the field coil to turn on and off; the voltage regulator being equipped with a detecting portion to detect the field current flowing through said field coil; and further comprising a field current controller, having a reference voltage supplying portion which generates a reference voltage to determine the field current by charging a set value which depends on the intermittent condition of the field current of the voltage regulator on the basis of a larger time constant than that of the field coil, and a comprising and controlling portion which compares each output of the detecting portion for a field current and the reference voltage supplying portion so as to control the voltage r

Abstract: A vehicle mounted a.c. generator includes an annular water coolant passage 32b around a stator coil 11 and a branch coolant passage 32c extending from an inlet portion of the annular coolant passage to a return portion thereof. An air circulation fan 60 may also be provided inside a front bracket 26 of the generator. Various embodiments include supplemental heat pipes and bearing coolant passages.

Abstract: A drive apparatus for driving the auxiliary equipment of an automobile engine or other motor is disclosed. It comprises a rotating input shaft which is connected to the crankshaft of an engine and on which is rotatably mounted a drive pulley which belt-drives auxiliary equipment. A planetary cone reduction gear is housed inside the pulley and transmits drive force from the input shaft to the pulley. A mechanism for adjusting the reduction ratio of the reduction gear operates in response to centrifugal force to reduce the reduction ratio of the reduction gear as the speed of the input shaft increases. The adjusting mechanism comprises a gear whose center of gravity is eccentric with respect to its rotational center and a cylindrical cam which is rotated by the rotation of the gear and whose rotation exerts a longitudinally-directed force on a speed change ring of the reduction gear.

Abstract: A drive apparatus for auxiliary equipment is disclosed which has a planetary cone reduction gear housed within a pulley which belt drives auxiliary equipment including a charging generator. An adjusting mechanism for adjusting the reduction ratio of the speed change gear is controlled by an electrical control circuit which is responsive to the rotational speed of the pulley. The voltage induced at the output terminal for one of the phases of a charging generator driven by the pulley is used as an electrical signal indicating the speed of the pulley.

Abstract: A drive apparatus for engine auxiliary equipment comprises a drive pulley mounted on the crank shaft of an engine. The rotation of the axle of the drive pulley by the crank shaft is transmitted to the grooved body of the drive pulley by a planetary cone-type reduction gear. An output ring of the reduction gear can be moved along the surface of the planetary cones of the reduction gear by an hydraulic ram to change the reduction ratio. A pump driven by the rotation of the drive pulley pumps transmission oil sealed within the housing of the pulley to drive the hydraulic ram. The oil pressure applied to the ram is determined by the opening and closing of a solenoid valve, which is controlled by a controller in accordance with the operating conditions of the engine and the auxiliary equipment driven by the drive pulley. The reduction gear, the pump, the hydraulic ram, and the solenoid valve are housed within the drive pulley which is the same size as a conventional drive pulley.

Abstract: A control apparatus for a vehicular generator for use in an automobile, etc., in which the temperature of the generator is detected so as to control switching of the field current of the generator when the temperature of the generator is below a predetermined value, so that the cold output current and cold drive torque of the generator are substantially the same as the hot output current and hot drive torque of the generator.

Abstract: A device which drives accessories such as an alternator or a cooling water pump utilizing output of an automobile engine, includes an input shaft installed to an output shaft of the engine, a continuously variable transmission with differential planetary mechanism of the frictional transmission type installed between the shaft and a pulley connected to the accessories, and a pressure adjusting device for adjusting the pressure of the frictional transmission oil retained in an annular chamber enclosing the continuously variable transmission. The pressure adjusting device is connected in communication with the annular chamber and includes bleed holes for providing a free liquid surface of the frictional transmission oil so that variation in pressure of the frictional transmission oil is absorbed by the vertical movement of the free liquid surface.