摘要:
An electronic circuit for control of a stepping motor (11), and in particular for damping the oscillations of the rotor thereof, comprises a digital-analog circuit (14) which, using a signal proportional to the angular speed of the rotor, which is taken off on one of the windings of the motor (11), provides a signal (SMR) to the control circuit (12) supplying the windings, so as to modulate the current in the other windings during the phase of stopping the motor in the desired position. This phase is selected by a signal (ATT) from a controlling unit (13) and the modulation is of such a sense as substantially to cancel the undesired oscillations. The circuit may be applied for example to motors for positioning typing elements in office printing or typing machines.
摘要:
A load control arrangement includes a communication channel configured to transmit information. A controller unit is coupled to the communication channel and configured to at least one of send and receive information via the communication channel. A load control device is coupled to the communication channel, comprising a disconnect switch configured to be coupled to a power line. The load control device is further configured to determine a power consumption of a load connected to the power line. The load control device provides measurement data representing the determined power consumption via the communication channel to the controller unit. The load control device drives the disconnect switch depending on drive information received via the communication channel or depending on the determined power consumption.
摘要:
An electric power meter arrangement, includes a metrology unit configured to be coupled to a power line and to determine power consumption and provide measurement data representing the power consumption. A programmable control unit including a memory is configured to store software configured to run on the control unit. A security unit is configured to store at least one key and to validate that software stored in the memory of the programmable control unit is authorized.
摘要:
A DC motor having a housing, a hub member rotatably supported by the housing, a flexible printed circuit board fixedly mounted on the housing, and an IC chip mounted on the flexible printed circuit board and located facing a recess formed in the housing. The hub member has a shaft rotatably supported by a bearing within the recess. The flexible printed circuit board has a metal layer for mounting the IC chip, the metal layer being isolated from a wiring pattern formed on the printed circuit board. The wiring pattern on the flexible printed circuit board is directly connected to a connection pin connected to the motor wiring.
摘要:
A load control arrangement includes a communication channel configured to transmit information. A controller unit is coupled to the communication channel and configured to at least one of send and receive information via the communication channel. A load control device is coupled to the communication channel, comprising a disconnect switch configured to be coupled to a power line. The load control device is further configured to determine a power consumption of a load connected to the power line. The load control device provides measurement data representing the determined power consumption via the communication channel to the controller unit. The load control device drives the disconnect switch depending on drive information received via the communication channel or depending on the determined power consumption.
摘要:
An electric power meter arrangement, includes a metrology unit configured to be coupled to a power line and to determine power consumption and provide measurement data representing the power consumption. A programmable control unit including a memory is configured to store software configured to run on the control unit. A security unit is configured to store at least one key and to validate that software stored in the memory of the programmable control unit is authorized.
摘要:
A multi-chip system in which at least one of the chips includes a performance parameter encoded thereon. After system assembly, the performance parameter can be obtained by a companion chip and used to automatically or semi-automatically fine tune the companion chip to the specific parameters of the at least one chip.
摘要:
A circuit device, made up of a reduced number of components, for simultaneously turning on a plurality of power transistors, being of a type adapted to be connected between the output of an oscillator and the bootstrap input of a turn-on circuit which are both incorporated into an integrated circuit also incorporating said transistors, further comprises:a first capacitor having one end connected to the oscillator output and the other end connected to the bootstrap input via a diode,a second capacitor connected between the bootstraps input and one voltage supply pole, anda second diode connected between the junction of the first capacitor and the diode, and the voltage supply pole.
摘要:
A multi-chip system in which at least one of the chips includes a performance parameter encoded thereon. After system assembly, the performance parameter can be obtained by a companion chip and used to automatically or semi-automatically fine tune the companion chip to the specific parameters of the at least one chip.
摘要:
The invention is used in a disk drive and comprises a feedforward circuit connected between the head position circuit and the speed control loop circuit. The feedforward circuit precompensates the speed control loop for changes in rotation drag due to movements in the head of a disk drive. The feedforward circuit may include one or more deadband amplifiers and may include filter circuit. The invention disclose the method for controlling the speed of a spindle motor in a disk drive which includes the step of precompensating the speed control loop circuit with a processed head positioning signal.