Abstract:
A resolver includes an excitation signal generator which generates a sine wave and a cosine wave as an excitation signal, a rotor which receives the excitation signal, and a rotary transformer which detects an output signal of the rotor, the resolver being arranged to detect angle information of the rotor. The resolver further includes a controller which outputs angle information at a zero cross point of the output signal detected by the rotary transformer. The resolver can provide high detection accuracy and be low in cost.
Abstract:
A fuel supply system comprises an engine control unit (ECU), a fuel pump with a built-in pump motor which is PWM controlled based on a control signal from the ECU, a pump controller for controlling supply of electric power to the pump motor, and sensors for detecting an operating state of the engine. A control section of the pump controller controls to change a frequency to be lower as a duty ratio of a PWM control signal to operate a power transistor of an output circuit is higher and inversely to change the frequency to be higher as the duty ratio is lower.
Abstract:
In a fault diagnosis system (10) in a load driving arrangement, the fault diagnosis system detecting a fault in the load driving arrangement in which a controller (13) outputs a control signal to a driver (12) and the driver (12) drives a load (11) according to the control signal, a fault detecting unit (21) and an exclusive OR circuit (22) are provided to enable outputting, as a monitor signal, a signal opposite to the control signal upon detecting a fault in the load driving arrangement and outputting, as a monitor signal, the same signal as the control signal when not detecting a fault, a monitor signal output from the exclusive OR circuit (22) is input to the controller (13), and the controller (13) compares the control signal and the monitor signal and diagnoses whether a fault occurs in the load driving arrangement, based on the result of the comparison.
Abstract:
A label printer for printing predetermined data on and issuing labels includes a tubular roll holder (101) secured at one end to a vertical wall (11a), a slide member (102) slidably accommodated within the hollow of the roll holder (101), and a roll retaining lever (103) connected to the slide member 102for pivotal movement between folded and erected positions. The roll retaining lever (103) has one end portion (103a) protruding outwardly from the hollow of the roll support shaft through a slot (101a) defied in the roll holder (101) in communication with the hollow thereof, when the roll retaining lever (103) is pivoted to the erected position, to thereby retain a roll (R) of the ribbon-shaped label sheet (Rp) in position on the roll holder (101) to avoid any possible lateral displacement thereof, but the roll retaining lever (103) when in the folded position lies substantially parallel to a longitudinal axis of the roll holder (101) to allow the label roll (R) to be mounted onto the roll holder (101). By this design, not only can the label roll (R) be retained in position on the roll holder (101) within a label supply unit (100) to avoid any possible lateral displacement thereof along the roll holder (101), but also the position at which the roll retaining lever (101) is to be erected can be adjusted. Also, the label roll (R) can be quickly and easily mounted on the roll holder (101).
Abstract:
A rotational position sensor includes a rotor substrate and a stator substrate placed to face each other to detect rotational displacement of the rotor substrate. The rotor substrate is formed with an excitation coil in a meandering pattern on an outer circumferential side and a rotor-side rotary transformer on an inner circumferential side. The stator substrate is formed with four detection coils in a meandering pattern on an outer circumferential side and a stator-side rotary transformer on an inner circumferential side. The four detection coils are arranged in a circumferential direction without overlapping each other. The detection coils are displaced from each other by 360°/8. The rotational position sensor includes a high frequency excitation circuit for applying a high frequency signal to the excitation coil through the rotor-side rotary transformer and the rotor-side rotary transformer to excite the excitation coil.
Abstract:
A phase difference type resolver is adapted such that a calculator calculates an angle from a phase difference at a detection-signal zero cross point, determines a velocity at the angle based on an angle calculated from a phase difference at a previous detection-signal zero cross point, calculates an estimated angle at a next detection-signal zero cross point based on the velocity, divides a difference between the estimated angle and the angle into predetermined minimum detection angles, and outputs a real-time signal based on the minimum detection angles in a range after the angle but before the estimated angle.
Abstract:
The present invention provides a fuel supply device that can suppress the excessive heating of a fuel supplied from a fuel pump into an internal combustion engine even if a control module is cooled. The fuel supply device (1) comprises a set plate (10) attached to a mounting hole (34a) of a fuel tank (34), an electric fuel pump (30) attached to an inner surface of the set plate (10), a control module (14) attached to an outer surface of the set plate (10), the control module driving the fuel pump (30) using electric power supplied from the exterior, and a heat radiating member (32) for radiating heat generated in the control module. One end of the heat radiating member (32) is thermally connected to the control module (14), and the other end of the heat radiating member (32) protrudes downward from the inner surface of the set plate (10).
Abstract:
A fuel pump control device including an electric component for controlling a fuel pump is placed in a fuel tank. The electric component is hermetically enclosed in a housing. An adsorbent of a cartridge type for adsorbing fuel vapor is provided in the housing. The housing includes a housing body and a covering member closing an opening of the housing body. The electric component includes a control circuit unit and an external terminal extending from the control circuit unit. The external terminal is provided passing through the covering member to the outside. The adsorbent is charged between the covering member and the control circuit unit so that the external terminal is placed passing through the adsorbent.
Abstract:
A resolver includes an excitation signal generator which generates a sine wave and a cosine wave as an excitation signal, a rotor which receives the excitation signal, and a rotary transformer which detects an output signal of the rotor, the resolver being arranged to detect angle information of the rotor. The resolver further includes a controller which outputs angle information at a zero cross point of the output signal detected by the rotary transformer. The resolver can provide high detection accuracy and be low in cost.