Abstract:
Die Erfindung bezieht sich auf ein elektrisches Kleingerät mit einem Elektromotor zum Erzeugen wenigstens einer oszillierenden Bewegung. Der Elektromotor weist zwei Antriebskomponenten (1, 2, 28, 29) auf. Eine der Antriebskomponenten (1, 2, 28, 29) ist über wenigstens ein erstes elastisches Element (18, 19, 23,25, 33) mit wenigstens einem beweglichen Bauteil verbunden und mittels eines Magnetfelds einer elektrischen Spule (5) zu einer oszillierenden Bewegung anregbar. Die Besonderheit des elektrischen Kleingeräts besteht darin, daß beide Antriebskomponenten (1, 2, 28, 29) sich gegenseitig antreiben und zur Ausführung von zueinander gegenphasig oszillierenden Bewegungen beweglich im elektrischen Kleingerät angeordnet sind.
Abstract:
Power supplies minimize any net torque and/or vibration produced on a drive assembly. The power supplies (18) are especially usefully employed in operative association with a drive assembly having a drive magnet assembly (23). Most preferably, the power supplies are embodied in a control circuit which controls the angular velocity of a drive assembly (e.g. the motor (26) and the drive magnet assembly) so that its angular velocity is maintained at a constant level. A control circuit is most preferably capable of quickly adjusting the angular velocity of the drive assembly back to the constant level if the rotational speed of drive assembly were to deviate therefrom because of, for example, a force load imposed on the drive assembly. Such an adjustment is most preferably accomplished in less time as compared to the time required for one rotation of the drive assembly to thus minimize any net torque and/or vibration thereon.
Abstract:
A system for controlling the speed of an arm of a disk drive, including a feedback circuit for generating a feedback signal representative of the speed of the arm, and a drive circuit for comparing the feedback signal with a predetermined command signal representing a commmand speed, and adjusting a drive signal for a motor to drive the arm at the command speed. The feedback signal, which represents the back EMF of the motor, is compared with the command signal to determine an acceleration state of the arm, and the acceleration state is used with a previous acceleration state to determine whether to adjust a predetermined level at which the motor is driven.
Abstract:
The proposed process forsees the following phases: a) measuring, with the RC method, the mechanical angle between the polar axes of the rotor and the stator of a resolver, one of which is integral with the rotor of the motor; b) opening and subsequent closing of a counting window that gives the ''enable'' to ''count'' to a counter that is fed by a clock, in such a way that the number of counted impulses univocally corresponds to the measured angle; during this phase a count adjustment is possible, by modifying its contents according to other external factors; c) transmitting this count as an address to a memory where for each numerical data received, the wave-form required to control the synchronous motor are stored; d) transmitting the storage outputs to a multiplying digital to analogic converter having a multiplication coefficient established by the factor that has to be externally adjusted. e) acting on the contents of the counter, modifying them according to other external factors such as speed, voltage, current or the like.
Abstract:
본 발명은 카메라 모듈의 렌즈를 이동시키는 보이스 코일 모터(Voice Coil Motor:이하 VCM이라 함)의 구동제어에 관한 것으로, 특히 렌즈 초기 구동 혹은 랜딩(landing) 시에 소음을 저감시키고 이동시간을 단축시킬 수 있는 VCM 구동제어방법에 관한 것으로, 카메라 동작 명령에 응답하여 미리 설정된 제1변곡점까지 제1기울기를 가지고 선형 증가하는 전류를 상기 VCM에 인가하는 단계와, 상기 변곡점에서 인피니트 포지션까지 상기 제1기울기보다 작은 제2기울기를 가지고 선형 증가하는 전류를 상기 VCM에 인가하여 렌즈를 인피니트 포지션으로 이동시키는 단계를 포함함을 특징으로 한다.
Abstract:
본 발명은 카메라 모듈의 렌즈를 이동시키는 보이스 코일 모터(Voice Coil Motor:이하 VCM이라 함)의 구동제어에 관한 것으로, 특히 렌즈 초기 구동 혹은 랜딩(landing) 시에 소음을 저감시키고 이동시간을 단축시킬 수 있는 VCM 구동제어방법에 관한 것으로, 카메라 동작 명령에 응답하여 미리 설정된 제1변곡점까지 제1기울기를 가지고 선형 증가하는 전류를 상기 VCM에 인가하는 단계와, 상기 변곡점에서 인피니트 포지션까지 상기 제1기울기보다 작은 제2기울기를 가지고 선형 증가하는 전류를 상기 VCM에 인가하여 렌즈를 인피니트 포지션으로 이동시키는 단계를 포함함을 특징으로 한다.
Abstract:
The invention relates to a rotor for a synchronous machine of a motor vehicle, the rotor having: an excitation coil (LER) for generating a magnetic field needed for rotation of the rotor in a stator of the synchronous machine; a power supply circuit (1R) which can be supplied with energy in a contactless way so that the power supply circuit (1R) supplies the excitation coil (LER) with energy to generate the magnetic field; and a demagnetisation circuit for demagnetising the excitation coil, which, when the energy supply to the excitation coil (LER) breaks down, diverts a current flowing through the excitation coil (LER) into a circuit branch containing at least one demagnetising component (DZR1), the at least one component (DZR1) also having a protective function for protecting the power supply circuit from an induction voltage generated at the excitation coil (LER).