摘要:
A method of monitoring a burn-in apparatus, which brings a heater and a temperature sensor into contact with various devices under test during a burn-in test and controls power consumption of the heater to adjust levels of temperature of the devices under test, wherein the temperature sensor detects temperature of a temperature control block in which the heater and the temperature sensor are arranged and with which a cooling liquid is in contact while the devices under test are not in contact with the heater and the temperature sensor, and the temperature sensor is diagnosed to be normal or not based on a result of detection.
摘要:
An electric rotating machine has a stator generating a magnetic flux and a rotor with a columnar armature core and an armature coil wound on the core. The flux passes through the rotor. The rotor is rotatable around its center axis. The core has slots aligned along its circumferential direction. Each slot extends along an axial direction of the core. The coil has upper layer coil parts and lower layer coil parts alternately connected with one another. Each pair of upper and lower layer coil parts is received in one slot so as to place the lower layer coil part nearer to the center axis of the core than the upper layer coil part. A sectional area of the upper layer coil part received in each slot is larger than a sectional area of the lower layer coil part received in the slot.
摘要:
A magnet switch for a starter of the present invention includes a plunger and a switch frame. The plunger has a stepped part at the outer peripheral surface thereof. The switch frame has a projection at an end face thereof, the end face being opposed to the outer peripheral surface of the plunger. Engagement of the stepped part of the plunger with the projection of the switch frame can lock forward movement of the plunger, so that no impact force is imposed on the movable contact and the insulator. Thus, deformation of the movable contact and breakage of the insulator can be prevented, and the axial length of the magnet switch can be reduced to reduce the size of the magnetic switch.
摘要:
An electromagnetic switch has a shaft and a movable contact member slidably supported by the shaft. The shaft is moved with a plunger when an electromagnet is formed of an electromagnetic coil receiving an electric current and attracts the plunger. The movable contact member is moved with the plunger and connects fixed contact members with each other to turn on the switch. The shaft has a shaft body and a projection projected from the shaft body. The movable contact member has a hole. The projection is inserted into the hole to pass through the hole, and the movable contact member is disposed on the shaft body. Then, the movable contact member is rotated so as to engage the projection with the movable contact member. Therefore, the projection prevents the movable contact member from coming out of the shaft.
摘要:
In an electromagnet switch, a stationary iron core is composed mainly of a base part and a disk part. The base part is faced to a plunger and the disk part is forcedly inserted and fixed to a boss part formed in the base part. The disk part is composed of a metal plate of ferromagnetic substance (iron plate) and another substance plate (made of resin or rubber and the like, for example,) of a smaller spring constant or a larger damping coefficient than that of the metal plate. The metal plate and another substance plate are laminated. Another substance plate absorbs or reduces the impact force when the plunger is electromagnetically attracted toward and collides with the base part. The propagation of a large impact noise or crashing sound is thereby suppressed, and as a result the impact noise can be reduced.
摘要:
A starter solenoid switch according to the present invention includes a first and a second set of contacts that are disposed between a battery and a starter motor in parallel with each other. The first and the second sets of contacts are so configured that the second set of contacts is closed to supply a lighter electric current to the starter motor before the first set of contacts is closed to supply a heavier electric current to the same. The second set of contacts is composed of a second fixed contact and a second movable contact, one of which includes a low-resistance portion at one end thereof and a high-resistance portion that contains more carbon than the low-resistance portion. The low-resistance and the high-resistance portions are serially disposed along a conducting path of electric current from the battery to the starter motor, thereby ensuring reliability of the starter solenoid switch.
摘要:
A pinion gear of a starter is engaged with a ring gear of an internal combustion engine by restricting rotation of the pinion gear while driving a motor at a low speed. After the engagement is established, the motor is driven at a full speed by supplying a full current, thereby cranking up the engine. After the engine is cranked up, the engagement between the pinion gear and the ring gear is released. In order to prevent the motor from being driven at the full speed before the pinion gear fully engages with the ring gear, rigidity of a crank bar for restricting the pinion rotation is made sufficiently high to generate a spring-load that exceeds a force for driving a plunger that closes a switch for supplying the full current.