Abstract: A method of preheating an unfinished stator as an intermediate product before a stator as a final product for a motor is provided in order to preheat a mold for molding together with the unfinished stator in short time by using preheating facilities with simplified structures. In the method, the mold has a hollow and longitudinal barrel portion and a flange portion extending outward from an end of the barrel portion. The flange portion is arranged at a horizontal position to turn the barrel portion upward and an end of a cylindrical and longitudinal frame is put on the flange portion in a state where a core of the unfinished stator is fitted in the frame. A heat-resistant box of which an underside is opened covers the frame and the mold to surrounded outsides of the frame and the mold.

Abstract: A method of preheating an unfinished stator as an intermediate product before a stator as a final product for a motor is provided in order to preheat a mold for molding together with the unfinished stator in short time by using preheating facilities with simplified structures. In the method, the mold has a hollow and longitudinal barrel portion and a flange portion extending outward from an end of the barrel portion. The flange portion is arranged at a horizontal position to turn the barrel portion upward and an end of a cylindrical and longitudinal frame is put on the flange portion in a state where a core of the unfinished stator is fitted in the frame. A heat-resistant box of which an underside is opened covers the frame and the mold to surrounded outsides of the frame and the mold.

Abstract: In an electric motor for a vehicle, a fan integrally rotatable with a rotor is located on one end in a direction of the axis of the rotor, a bracket for accommodating the fan is joined on one end in the direction of the axis of a stator frame for accommodating a stator, and the bracket is provided with an outside air inlet and a dust emission outlet. The bracket is provided with an expanded section which has an inner peripheral surface bulging on an outer peripheral side in a radial direction beyond a peripheral surface of the stator frame, and at least a part of the dust emission outlet opens to the inner peripheral surface of the expanded section.

Abstract: An equivalent circuit of a converter (4) is represented by a series connection between an equivalent capacitor (41) and an equivalent resistor (42), and the converter (4) includes a controller that adjusts a power factor of the input power by controlling a capacitive reactance (Xc) of the equivalent capacitor (41).

Abstract: An in-wheel motor system can drive an in-wheel motor stably, and also allows power feeding from the road surface, even when transmission and reception coils are misaligned. An in-wheel motor system (1) includes a power transmitter (100) that utilizes a resonance phenomenon using a magnetic field. The power transmitter (100) transmits power (P) wirelessly from the vehicle body to an in-wheel motor (10) mounted in a wheel. The in-wheel motor system (1) may also include a communication interface (110) that communicates between the vehicle body and the wheel, and the communication interface (110) may transmit a control signal (CTL) for driving the in-wheel motor.

Abstract: An equivalent circuit of a converter (4) is represented by a series connection between an equivalent capacitor (41) and an equivalent resistor (42), and the converter (4) includes a controller that adjusts a power factor of the input power by controlling a capacitive reactance (Xc) of the equivalent capacitor (41).

Abstract: Voltage applied to switching elements of a power conversion device is suppressed to be within a predetermined range. A power conversion device (1) includes a leg (31) in which switching elements (41, 42) are connected in series, a leg (32) in which switching elements (43, 44) are connected in series, a reactor (61) connected between the midpoint of the switching elements (41, 42) and the switching-element (43) end not connected to the switching element (44), a reactor (62) connected between the midpoint of the switching elements (43, 44) and the switching-element (42) end not connected to the switching element (41), and a DC power source (10) connected between the switching-element (41) end not connected to the reactor (61) and the terminal of the switching element (44) not connected to the reactor (62). Loads can be connected in parallel to the legs (31, 32).

Abstract: Provided is a master controller that can be adopted in a variety of vehicles in which different current capacities are required for the master controller. A master controller includes a handle (3), cams (2a to 2f) interlocking with the handle (3), cam switches (1a to 1f) connected to or disconnected from the cams (2a to 2f) in accordance with the position of the handle (3), and a relay circuit (6) that outputs output signals in accordance with input signals input through the cam switches (1a to 1f).

Abstract: A gear device for electric motor 1 which is combined with an electric motor installed in a vehicle, wherein a breather pathway 8 is provided in a gear box 2 where a row of gears for transmitting force of the electric motor is contained, the breather pathway connecting between an inside and outside of the gear box 2, and in the breather pathway 8, a closing valve system 10 is provided to close the breather pathway 8 when an outer pressure of the gear box 2 is lower in comparison to an inner pressure of the gear box 2 exceeding an acceptable range.

Abstract: Provided is a master controller that can be adopted in a variety of vehicles in which different current capacities are required for the master controller. A master controller includes a handle (3), cams (2a to 2f) interlocking with the handle (3), cam switches (1a to 1f) connected to or disconnected from the cams (2a to 2f) in accordance with the position of the handle (3), and a relay circuit (6) that outputs output signals in accordance with input signals input through the cam switches (1a to 1f).

Abstract: An in-wheel motor system can drive an in-wheel motor stably, and also allows power feeding from the road surface, even when transmission and reception coils are misaligned. An in-wheel motor system (1) includes a power transmitter (100) that utilizes a resonance phenomenon using a magnetic field. The power transmitter (100) transmits power (P) wirelessly from the vehicle body to an in-wheel motor (10) mounted in a wheel. The in-wheel motor system (1) may also include a communication interface (110) that communicates between the vehicle body and the wheel, and the communication interface (110) may transmit a control signal (CTL) for driving the in-wheel motor.

Abstract: Voltage applied to switching elements of a power conversion device is suppressed to be within a predetermined range. A power conversion device (1) includes a leg (31) in which switching elements (41, 42) are connected in series, a leg (32) in which switching elements (43, 44) are connected in series, a reactor (61) connected between the midpoint of the switching elements (41, 42) and the switching-element (43) end not connected to the switching element (44), a reactor (62) connected between the midpoint of the switching elements (43, 44) and the switching-element (42) end not connected to the switching element (41), and a DC power source (10) connected between the switching-element (41) end not connected to the reactor (61) and the terminal of the switching element (44) not connected to the reactor (62). Loads can be connected in parallel to the legs (31, 32).

Abstract: A slider is slightly moved in a direction in which both side surfaces of the slider come in contact with inclined surfaces of impact mitigating parts of neighboring contact strip pieces. For this reason, the inclined surface of the impact mitigating part of the contact strip piece which the slider approaches is relatively downwardly slid with respect to one side surface of the slider. In addition, the inclined surface of the impact mitigating part of the contact strip piece from which the slider moves away is relatively upwardly slid with respect to the other side surface of the slider. As a result, since an impact generated between the contact strip piece and the slider is mitigated by the impact mitigating part without fitting the slider into a stepped section between the neighboring contact strip pieces, the slider is smoothly transferred from the one contact strip piece of the neighboring contact strip pieces to the other contact strip piece.

Abstract: In an electric motor for a vehicle, a fan integrally rotatable with a rotor is located on one end in a direction of the axis of the rotor, a bracket for accommodating the fan is joined on one end in the direction of the axis of a stator frame for accommodating a stator, and the bracket is provided with an outside air inlet and a dust emission outlet. The bracket is provided with an expanded section which has an inner peripheral surface bulging on an outer peripheral side in a radial direction beyond a peripheral surface of the stator frame, and at least a part of the dust emission outlet opens to the inner peripheral surface of the expanded section.

Abstract: A chassis dynamometer for a vehicle has a base seat, a fixed shaft having one end thereof attached to the base seat, a rotary proximal portion rotatably supported to the fixed shaft, a roller connected to the rotary proximal portion, for loading a wheel of a vehicle, and a motor connected to the roller so that power can be transmitted therebetween. The roller has a single flange portion connected to the rotary proximal portion and extending obliquely to the axis, and an outer peripheral portion extending both axial directions from an outer periphery of the flange portion and disposed outward in the radial direction of the motor.

Abstract: Main circuit of an electric power generating apparatus for dispersed power supply, having a permanent magnet type electric power generator driven by windmill or waterwheel and having three windings, each inducing a different value of induced voltage, AC outputs of the generator rectified by rectifiers, and DC outputs of the rectifiers summed in parallel for output. First and second reactors are respectively connected in series between first and second rectifiers and output terminals of first and second windings, the first winding inducing the lowest induced voltage among the three windings, the second winding inducing the second lowest. A capacitor is connected between a third rectifier and an output terminal of a third winding inducing the highest induced voltage. The sum of inductive impedance by internal inductance of the third winding and capacitive impedance by the capacitor is capacitive impedance within a range of rotational speed of the generator.

Abstract: A chassis dynamometer for a vehicle has a base seat, a fixed shaft having one end thereof attached to the base seat, a rotary proximal portion rotatably supported to the fixed shaft, a roller connected to the rotary proximal portion, for loading a wheel of a vehicle, and a motor connected to the roller so that power can be transmitted therebetween. The roller has a single flange portion connected to the rotary proximal portion and extending obliquely to the axis, and an outer peripheral portion extending both axial directions from an outer periphery of the flange portion and disposed outward in the radial direction of the motor.

Abstract: Main circuit of an electric power generating apparatus for dispersed power supply, having a permanent magnet type electric power generator driven by windmill or waterwheel and having three windings, each inducing a different value of induced voltage, AC outputs of the generator rectified by rectifiers, and DC outputs of the rectifiers summed in parallel for output. First and second reactors are respectively connected in series between first and second rectifiers and output terminals of first and second windings, the first winding inducing the lowest induced voltage among the three windings, the second winding inducing the second lowest. A capacitor is connected between a third rectifier and an output terminal of a third winding inducing the highest induced voltage. The sum of inductive impedance by internal inductance of the third winding and capacitive impedance by the capacitor is capacitive impedance within a range of rotational speed of the generator.

Abstract: A gear device for electric motor 1 which is combined with an electric motor installed in a vehicle, wherein a breather pathway 8 is provided in a gear box 2 where a row of gears for transmitting force of the electric motor is contained, the breather pathway connecting between an inside and outside of the gear box 2, and in the breather pathway 8, a closing valve system 10 is provided to close the breather pathway 8 when an outer pressure of the gear box 2 is lower in comparison to an inner pressure of the gear box 2 exceeding an acceptable range.

Abstract: In an electric power generating apparatus for dispersed power supply using a permanent magnet type electric power generator having many kinds of windings in order to obtain the maximum output by force of wind without using PWM converter, there is a problem that gap magnetic flux of the permanent magnet type electric power generator is demagnetized to decrease the internal induced voltage because alternating current output of the permanent magnet type electric power generator is lagging current.