摘要:
An electric motor control system has a motor driver comprising a bridge of switching elements, a pair of failure detectors, and a microcomputer. The motor driver is connected between a battery and an electric motor that is connected between the switching elements. The switching elements are turned on and off according to drive pulse signals supplied from the microcomputer for supplying a pulsed current to the electric motor. The failure detectors monitor the electric energy supplied to the electric motor to detect a period of time in which the supplied electric energy is free of pulses, and supply a signal indicative of the detected period of time to the microcomputer. Based on the signal from the failure detectors, the microcomputer detects a failure when the detected period of time exceeds a predetermined period of time.
摘要:
A four-wheel steering system on an automobile has front road wheels steerable by a steering wheel and rear road wheels steerable by an electric motor and normally biased to a neutral steering position by a spring. The electric motor is energized by a motor driver to steer the rear road wheels through an angle depending on running conditions of the automobile. The electric motor has a winding and two sets of brushes or connecting terminals connected to opposite terminals of the winding. One of the two sets of connecting terminals is connected to the motor driver. The other of the two sets of connecting terminals is connected to a short-circuiting circuit parallel to the motor driver. In the event of a failure, a controller controls the short-circuiting circuit to short-circuit the winding of the motor through the other set of connecting terminals. The short-circuiting circuit comprises a plurality of relays having respective contacts connected in series between the connecting terminals of the other set. The motor driver can also short-circuit the winding of the motor through the one set of connecting terminals in the event of a failure.
摘要:
In a method for controlling a rear wheel steering device of a front and rear wheel steering vehicle, the target computed rear wheel steering angle is defined as a value smaller than the normal computed target rear wheel steering angle when the load of the steering actuator is greater than a prescribed threshold value, and which is otherwise equal to the normal computed target rear wheel steering angle, and the steering actuator is actuated according to a deviation of the actual rear wheel steering angle from the modified computed target rear wheel steering angle, typically with a duty ratio control. Thus, the rear wheel steering device can be operated in a satisfactory manner even when the output capacity of the actuator for the rear wheel steering device is limited, and the steering load is high. A high load condition typically occurs when the vehicle is stationary and when the steering wheel is turned sharply while the vehicle is traveling over a road surface having a high frictional coefficient.
摘要:
The present invention relates to an image forming apparatus comprising: an exposing means and a developing means. The developing means comprises a plurality of developing devices, a rotating member rotatable while supporting the plurality of the developing devices, and a driving means for the rotation drive of the rotating member for selectively moving the plurality of the developing devices to the developing position such that the driving means transmits driving force to the rotating member via a gear at a drive transmitting position. An angle θe(°) formed by a straight line linking the rotation center of the rotating member and the drive transmitting position and the tangent of the image bearing member at an exposing position in the image bearing member moving direction satisfies the following relationship with the premise that an pressure angle of the gear is α(°) and the image bearing member rotating direction is positive:−α≦θe≦α.
摘要:
A developer supply apparatus includes a portion receiving a developer supply container and being movable between mounting/demounting and developer supply positions, a mechanism for moving the container receiving portion between its two positions by a manually operable lever, and a mounting discrimination member on the container receiving portion movable therewith and operatively connected with the lever and provided for relative movement between the mounting discrimination member and a portion to be discriminated provided on the developer supply container in interrelation with a moving operation of the lever. When the mounting discrimination member makes relative movement to reach a regular position, the container receiving portion moves to the developer supply position, and when the mounting discrimination member makes relative movement, and the discrimination member interferes with the portion to be discriminated before reaching the regular position, the container receiving portion is prevented from moving to the developer supply position.
摘要:
A control apparatus for a vehicle including an inertia force sensor for detecting an inertia force generated in the vehicle and a cooperative control unit connected to the inertia force sensor and connected also to a braking/driving force control unit and a steering control unit so that bidirectional communication is allowed, for deciding and outputting controlled variables or controlled correction variables of the braking/driving force control unit and the steering control unit according to the inertia force detected by the inertia force sensor and according to controlled conditions of the braking/driving force control unit and the steering control unit.
摘要:
It is an object of the present invention to provide an electric compressor capable of enhancing the mountability with respect to a vehicle without increasing the compressor in size when the electric compressor and a motor-driving circuit which drives a motor of the electric compressor are integrally formed together. A suction chamber 61 which is in communication with a fixed panel suction port 16 provided in a fixed scroll 11 from a suction port 8 provided in a sub-casing 102, and a discharge chamber 62 which is in communication with a communication passage 63 from a fixed panel discharge port 31 provided in the fixed scroll 11 are disposed on the same plane in a radial direction of a compressor, and the motor-driving circuit 101 is disposed in an axial direction of the compressor so that an IPM 105 which is a heat generating part of the circuit substrate 103 can be brought into tight contact with the suction chamber 61.
摘要:
It is an object of the present invention to provide an electric compressor capable of enhancing the mountability with respect to a vehicle without increasing the compressor in size when the electric compressor and a motor-driving circuit which drives a motor of the electric compressor are integrally formed together. A suction chamber 61 which is in communication with a fixed panel suction port 16 provided in a fixed scroll 11 from a suction port 8 provided in a sub-casing 102, and a discharge chamber 62 which is in communication with a communication passage 63 from a fixed panel discharge port 31 provided in the fixed scroll 11 are disposed on the same plane in a radial direction of a compressor, and the motor-driving circuit 101 is disposed in an axial direction of the compressor so that an IPM 105 which is a heat generating part of the circuit substrate 103 can be brought into tight contact with the suction chamber 61.
摘要:
A drive transmission apparatus includes a first coupling portion having a polygonal shape; a second coupling portion having a hole portion which has a cross-sectional configuration larger than the first coupling portion, the hole portion being engageable with the first coupling portion; and a center shaft provided on the first coupling or the second coupling, the center shaft penetrating the other one of the first and second coupling.
摘要:
A vehicle seat-belt apparatus including: a forward monitoring device which conducts monitoring to the front of a vehicle; an avoidance assist device which supports a predetermined avoidance operation in order to avoid an obstacle when it is determined that there is an obstacle to be avoided based on a detection result of the forward monitoring device; a motor which conducts a rotary driving of a belt reel on which a belt is wound; and a control device which controls the motor, wherein the control device conducts a drive control of the motor according to a state of support of the avoidance operation by the avoidance assist device.