摘要:
A drive circuit for driving an ultrasonic motor which maintains frequencies of drive signals for the ultrasonic motor within a drive frequency band. Generation of audible sound is thereby prevented. Further, it is possible to drive an ultrasonic motor in which irregularity of a waveform of a detection signal does not occur in an audible sound generating band.
摘要:
An improved actuator assembly is disclosed. The actuator has a rotor assembly rotatably mounted in a stator frame formed of a synthetic resin material. The stator frame has a borehole therein that receives a rotor assembly, a pair of mounting recesses, and a pair of bobbins portions. Each bobbin portion includes a slot. Induction magnets are mounted in each mounting recess of the stator frame such that they face the rotor assembly. A coils is would about each bobbin portion of the stator frame. The coils and induction magnets are angularly spaced about the rotor assembly. A core having a plurality of poles and holding portions, is also provided. Each core pole extends through an associated one of the bobbin slots and faces the rotor magnet. The holding portions are arranged to hold the induction magnets in place.
摘要:
A structure and method of fixing a housing in which four mounting grooves are formed at regular intervals along a peripheral direction at an opening end of a cylindrical yoke housing. An end housing is provided with a peripheral portion whose outer diameter is formed smaller than an inner diameter of the yoke housing, and a plurality of protrusions which protrude from the peripheral portion and correspond to the mounting grooves. In a state in which the protrusions are each mounted to the corresponding mounting grooves, four pairs of caulking claws, each pair of which is disposed at both ends in a widthwise direction of a respective mounting groove, are all fixed by being caulked simultaneously. The end housing is thereby coaxially fixed to the yoke housing.
摘要:
An automatic controller for use with a motor. A switch interconnects the motor and a power source for selectively establing an electrical connection therebetween. A relay coil is connected to the motor. When the motor is connected to the power source via the switch, the relay coil latches the switch in a steady connecting state. When increased current overdraw of the motor is sensed, a current-limiting thermistor limits or interrupts the current flow across the relay coil, to set the switch to a disconnect state and to cause the motor to stop.
摘要:
An improved driving circuit for an ultrasonic motor is disclosed. The driving circuit includes an oscillator that outputs an oscillating signal. A driving means receives the oscillation and an input control signal and outputs a drive signal that drives the ultrasonic motor. The driving means is arranged to gradually alter the driving signal in response to the input signal by modifying the oscillation signal and amplifying the modified signal. In this manner the rotational speed of the ultrasonic motor is gradually change in response to the operational condition changes ordered by the input device.
摘要:
A vehicle window regulating apparatus is designed to move a window glass in a door on the side of a passenger seat up and down by operations of a remote contol switch installed on the door on the side of a driver seat. A relay is provided on a power supply line for supplying electric power to a motor in the door on the passenger seat side. This relay and the remote control switch are connected by way of a signal line and is of a diameter smaller than that of the power supply line. With operations on the remote control switch, switching signals are supplied to the relay via the signal line, and the relay is thereby turned on and off so as to supply electric power to the motor via the power supply line, so that the window glass is moved upward or downward. In the prior art apparatus, the motor on the passenger seat side is remote-controlled via the power supply line, but the present invention performs the remote control of the motor on the passenger seat side and can therefore achieve a reduction of power supply loss.
摘要:
In the electric actuator of the present invention, the power converting mechanism is provided for converting the rotary power of the motor into linear power of the driven member, which needs no special component part. Therefore, in comparison with the prior art power converting mechanism, it is advantage in that the scale of speed reduction and the stroke can be freely determined, with remarkably reduced number of parts and in low cost. The electric actuator according to the present invention is also provided with the improved clutch device employing the engagement of the weight and the recessed portion for secure transmission of the rotary power of the motor, resulting in full utilization of the capacity of the motor in simplified structure.
摘要:
A wire guiding apparatus in a coil winding machine which is adapted to continuously wind a wire around an armature core with a slot provided therein from a flier, wherein a pair of receiving rollers that come into contact on both the upper, lower sides with respect to the outer peripheal faces on both the right, left sides of the iron core are provided, the pair of receiving rollers are mounted on the main body side for their mutually opening, closing operations, the receiving rollers are adapted to be operated in contact with the outer peripheral face of the iron core so as to be opened, closed and also, to be locked in the set position of the iron core when the outer diameter of the iron core has been varied, and a pair of wire guides for guiding the wire into the slot of the iron core from the flier are provided for their mutually opening, closing operations, the wire guide is operated, tracing the outer diameter variation in the iron core to be opened, closed so as to be conformed into the slot position of the iron core.
摘要:
In the electric actuator of the present invention, the power converting mechanism is provided for converting the rotary power of the motor into linear power of the driven member, which needs no special component part. Therefore, in comparison with the prior art power converting mechanism, it is advantage in that the scale of speed reduction and the stroke can be freely determined, with remarkably reduced number of parts and in low cost. The electric actuator according to the present invention is also provided with the improved clutch device employing the engagement of the weight and the recessed portion for secure transmission of the rotary power of the motor, resulting in full utilization of the capacity of the motor is simplified structure.
摘要:
An improved compact automobile fan unit of the type including a turbofan fixedly mounted on the drive shaft of a motor and having a plurality of backwardly curved blades, and a generally cup-shaped housing having intake openings in its end wall and discharge openings in its side wall and secured to a yoke of the motor for containing therein the turbofan, wherein the backwardly curved blades are circumferentially spaced at different angular intervals and the turbofan has a center of gravity located at an axis of the drive shaft. With the blades thus arranged, the fan unit is capable of operating at high speeds with large capacity without generating unpleasant noise.