摘要:
A motor controller is provided with a velocity processing unit that determines a corrected target rotation velocity by correcting the inputted target rotation velocity of the motor in accordance with a velocity deviation between the inputted target rotation velocity and an actual rotation velocity detected from the motor, a first PWM circuit that repeatedly outputs an on-signal having a first pulse width at a first carrier frequency, wherein the first pulse width of the on-signal is modulated by the first PWM circuit in accordance with the corrected target rotation velocity, a second PWM circuit that repeatedly outputs an on-signal having a second pulse width at a second carrier frequency, wherein the second pulse width is different from the first pulse width, the second carrier frequency is lower than the first carrier frequency, and the second pulse width of the on-signal is modulated by the second PWM circuit in accordance with the corrected target rotation velocity, an AND circuit that receives the on-signal outputted from the first PWM circuit and the on-signal outputted from the second PWM circuit and outputs third on-signal which is a logical product of the on-signals, and a voltage apply circuit that applies voltage to the motor intermittently in synchronization with the third on-signal outputted from the AND circuit. As a result, the rotation velocity of the motor may be correctly controlled.
摘要:
A motor controller is provided with a first PWM circuit that repeatedly outputs an on-signal at a first carrier frequency, a second PWM circuit that repeatedly outputs an on-signal at a second carrier frequency that is lower than the first carrier frequency, an AND circuit that receives both the on-signal outputted from the first PWM circuit and the on-signal outputted from the second PWM circuit and outputs a third on-signal which is a logical product of the received on-signals, and a voltage apply circuit that applies a voltage to the motor intermittently in synchronization with the third on-signal outputted from the AND circuit. At least one of the first carrier frequency and the second carrier frequency is equal to or lower than 1 kHz or equal to or higher than 3 kHz. As a result, generation of an unpleasant noise by a motor controller using two PWM circuits may be suppressed.
摘要:
A connector includes: a connector housing; a housing main body receiving terminal fittings; and a front holder to be attached to the housing main body. When the front holder is attached to the housing main body, and the housing main body receives the terminal fittings, a gap is formed between an outer wall of the housing main body and an inner wall of the front holder.
摘要:
To provide an excimer laser device and method in which the frequency of full gas exchange within the laser chamber is reduced, and more preferably full gas exchange is made unnecessary.The gas supply device and gas exhaust device are controlled so that the laser gas in the laser chamber is partially exchanged in a gas exchange quantity that maintains the quantity of impurities in the laser chamber at or below a fixed level. Also, the gas exchange quantity is obtained using the total quantity of output light energy reduction A, the total gas pressure in the laser chamber P, and output light energy reduction quantity per unit time k, for the case where partial gas exchange is repeated infinitely in the laser chamber.
摘要:
A connector includes a female connector housing, that has a male terminal, and a male connector housing that has a female terminal for electrical connecting to the male terminal, and that is adapted to be fitted into the female connector. The male connector housing includes an inner housing which has the female terminal, and which is adapted to be fitted in the female connector housing so that the female terminal is connected to the male terminal, and an outer housing which is adapted to support the inner housing so that the inner housing is movable in a first direction in which the inner housing is fitted in the female connector housing and in a second direction perpendicular to the first direction. When the inner housing is fitted into the female connector housing, the inner housing is disposed so as to separate from the outer housing in the second direction with a first gap.
摘要:
A vehicle headlamp includes a lamp body having a hollow portion opening forward, a support member supported tiltably in the lamp body, and a plurality of reflectors supported side by side in one of the vertical and lateral directions by the support member. Each reflector is made to support a corresponding light source and least one of the reflectors is pivotably supported by the support member in the horizontal direction. In one embodiment, a lower reflector is pivotable in the horizontal direction and a low beam is formed by an upper reflector and the light source supported by the upper reflector. In this embodiment, the upper reflector does not have any portion that does not affect luminous distribution.
摘要:
In a preionization discharge circuit 10, when a switch SW14 is turned on, an electric current i10 from a constant current source 13 flows through a loop of a coil L12, en electrode 11A and the switch SW14. When it is assumed that an inductance of the coil L12 is L (H) and the current i10 flowing through the coil L12 is I (A), energy EL of (1/2)·L·I{circumflex over ( )}2 is accumulated in the coil 12. Meanwhile, in a preionization discharge control section 40, a preionization discharge timing signal (namely, a corona emission timing signal) Ydt is output to the switch SW14 after lapse of a time ty (=Tds−tyd) after a pulse oscillation synchronizing signal TRL is received so that preionization discharge is caused earlier by a preset time tyd than the preionization discharge timing signal Ydt. When the switch SW14 is switched from on to off according to the corona emission timing signal Ydt, the energy EL accumulated in the coil L12 is abruptly supplied to the electrode 11A of the preionization electrode 11. Then, an electric field is produced between the electrode 11A and an electrode plate 11C and, when the electric field of the preionization electrode 11 rises to a predetermined preionization start electric field, a corona discharge is produced in a tube 11B as a dielectric of the preionization electrode 11 to flow an electric current i11, and a main discharge gap 3 is preionized before the main discharge is caused by main discharge electrodes 1 and 2.
摘要:
A discharge circuit for pulsed laser comprising a power source, main discharge electrodes for generating a laser beam, a main discharge capacitor charged with electrical charges for generating the main discharge between the main discharge electrodes, and a switching circuit for performing switching operations to charge the main discharge capacitor with electrical charges supplied from the power source in a prescribed repetition cycle, is provided, in parallel to the main discharge capacitors, with a circuit element for consuming or grounding the reverse current from the power source caused by overshoot generated directly after the main discharge, thereby attaining stable laser output without ill effects from overshoot voltage generated directly following discharge.
摘要:
A laser apparatus according to embodiment may include: a laser chamber filled with a laser gain medium; a pair of electrodes disposed in the laser chamber; a charger configured to apply a charge voltage for causing a discharge to occur between the pair of the electrodes; a pulse power module configured to covert the charge voltage applied by the charger into a short pulsed voltage, and apply the short pulsed voltage between the pair of the electrodes; and a controller configured to calculate input energies Ein applied to the pair of the electrodes based on the charge voltage, calculate an integration value Einsum of the input energies Ein by integrating the calculated input energies Ein, and determine whether the integration value Einsum exceeds an integration lifetime value Einsumlife of input energy or not.
摘要:
A vehicular lamp includes a light source unit that is attached to one of a lamp body and a reflector. The light source unit includes a semiconductor light emitting element that is a light source; a plurality of conductive members formed into a predetermined three-dimensional shape by press working a conductive metal material; and a housing that is formed of an insulating material. The plurality of conductive members each include: an element mounting portion to which the semiconductor light emitting element is mounted, a heat dissipating portion that dissipates heat generated when the semiconductor light emitting element emits light, and a connecting portion to which a connector that supplies power to the semiconductor light emitting element is connected. The housing holds the plurality of conductive members in a spaced apart state.