30results about How to "Wide input" patented technology

A scrolling scan optical band scanner is provided having a scrolling scan optic with a scan function that inherently deviates from an ideal imaging function over wide apertures. Compensation optics are provided to correct the scrolling scan optic performance to provide accurate imaging over a wide aperture. The compensation optics and the scrolling scan optic together accurately scroll the input pattern to an output pattern according to the formula: xo(t)/X=(t/T+xi/X) modulo 1, with X being the total height of input and output beam, xi being the ray height in the input beam, xo being the corresponding ray height in the output beam as a function of time, T being the frame period, and t being the time, and said scroll patterns remains telecentric even where X is large with respect to a physical size of the scanning optic system.

The invention discloses a wide-range bidirectional conversion circuit and a control method. The wide-range bidirectional conversion circuit comprises a three-stage bidirectional converter and a control unit, and the three-stage bidirectional converter is formed by sequentially connecting a non-isolated DC/DC converter, an isolated DC/DC converter and a DC/AC inverter. When the system works in theforward direction, a direct-current power supply or energy storage equipment realizes grid-connected energy feedback through the non-isolated DC/DC converter, the isolated DC/DC converter and the DC/AC inverter; and during reverse working, an alternating voltage supplies power to a direct-current load or charges an energy storage device through a rectifying circuit, the isolated DC/DC converter and the non-isolated DC/DC converter. In order to adapt to different power levels and realize higher input current ripple control, the non-isolated converter adopts a multi-phase interleaved parallel structure; and in order to further broaden the requirements of input and output ranges in practical application, the isolated converter can be controlled by adopting a full-bridge/half-bridge variable structure. The whole system has the advantages of wide input direct-current voltage range, wide output alternating-current voltage range, wide load range, small current ripple, high-frequency isolation, high efficiency, energy conservation, environmental protection and the like.

A power converter topology is adapted for efficiency according to input voltage, output voltage or output current conditions. Topology adaptation is achieved by control responsive to the input and output operating conditions, or to one or more external control signals. Transition between any two topologies is implemented by pulse width modulation in the two switches in one of two bridge legs of a full bridge converter. When transitioning from full-bridge to half-bridge topology, the duty ratio of one switch in one leg of the full bridge is increased, while simultaneously the duty ratio of the other switch in the same leg is reduced until one switch is continuously on, while the other switch is continuously off. The transition from the half-bridge to the full-bridge topology is accomplished by modulating the same switches such that, at the end of the transition, both switches operate with substantially the same duty cycle.

A bidirectional DC/DC converter includes first and second control circuits, and first and second bridge circuits respectively connected to first and second direct current voltage supplies. In one embodiment variant, when power is supplied from the first direct current voltage supply to the second direct current voltage supply, the first control circuit carries out PFM control of the first bridge circuit at a frequency equal to or lower than the resonance frequency of an LC resonant circuit in accordance with a control amount based on the voltage and current of the second direct current voltage supply. When power is supplied in the other direction, the second control circuit carries out fixed frequency control of the second bridge circuit, using phase shift control or the like, in accordance with a control amount based on the voltage and current of the first direct current voltage supply.

The present invention relates to an integrated magnetics component comprising a magnetically permeable core comprising a base member extending in a horizontal plane and first, second, third and fourth legs protruding substantially perpendicularly from the base member. First, second, third and fourth output inductor windings are wound around the first, second, third and fourth legs, respectively. A first input conductor of the integrated magnetics component has a first conductor axis and extends in-between the first, second, third and fourth legs to induce a first magnetic flux through a first flux path of the magnetically permeable core. A second input conductor of the integrated magnetics component has a second coil axis extending substantially perpendicularly to the first conductor axis to induce a second magnetic flux through a second flux path of the magnetically permeable core extending substantially orthogonally to the first flux path. Another aspect of the invention relates to a multiple-input isolated power converter comprising the integrated magnetics component.

A differential circuit comprises first and second differential pairs driven by constant-current sources, respectively, for receiving input voltages, first transistors, second transistors, and switches are included. In a first connection state, one current mirror comprises among the first transistors. Input and output terminals of the one current mirror are connected to outputs of the first differential pair. Two current mirrors are composed by the second transistors. Inputs of the two current mirrors are connected to the outputs of the second differential pair, and the outputs of the two current mirrors are connected to an input and an output of the one current mirror circuit. The output of the one current mirror is a first output. In a second connection state, one current mirror comprises among the second transistors. The input and the output of the one current mirror are connected to the outputs of the second differential pair. Two current mirrors are composed by the first transistors. The inputs of the two current mirrors are connected to the outputs of the first differential pair, and the outputs of the two current mirror circuits are connected to the input and the output of the one current mirror circuit, respectively. The output terminal of the one current mirror is a second output terminal.

An electrostatic clutch is described comprising a plurality of micron-scale thickness electrodes, adjacent electrodes being separated by a thin film of dielectric material. A power source and controller apply a voltage across two electrodes, causing an electrostatic force to develop. When engaged, a force can be transferred through the clutch. A tensioning device maintains the alignment of the clutch when the electrodes are disengaged, but permits movement in at least one direction. In some embodiments, multiple clutches are connected to an output to provide variable force control and a broad range of torque input and output values. Moreover, the clutch can be used as an energy-recycling actuator that captures mechanical energy from negative work movements, and returns energy during positive work movements.

The present invention discloses a starting circuit of a PWM chip of a super-wide voltage auxiliary power supply. The circuit comprises a voltage switching switch circuit, a voltage detection circuit and a charging circuit; the voltage switching switch circuit comprises a MOS tube Q1, a resistor R4 and a resistor R5; the voltage detection circuit comprises a MOS tube Q2, a resistor R7 and a resistor R8; and the charging circuit comprises a resistor R1 and a resistor R2. The starting circuit of the PWM chip of the super-wide voltage auxiliary power supply can provide stable charging current for the PWM chip VCC no matter how the input voltage is changed, the relative change amount is small; and when the power supply generates faults, the chip can restarted and cannot enter a locking state, after the faults are eliminated, the chip can be restarted with no need for power-off restarting, especially the circuit works in the ultrahigh voltage, the circuit loss is less than the loss of a routine circuit.

For controlling a switch power supply, an adjustment module produces a first control voltage by comparing a period of a switch signal with a reference period. A current source module generates a first charging current according to the first control voltage. A pulse signal generating module converts the first charging current into an on time signal or off time signal of a switch transistor. A driving module produces the switch signal according to the on time or off time signal of the switching transistor, so as to control the turn on and turn off signal of a switching transistor. A time measurement module obtains a time parameter according to the switch signal, and generates a periodic adjustment signal according to the time parameter. The adjustment module adjusts the reference period according to the periodic adjustment signal to adjust the period of the switch signal.

The invention provides a constant-current-to-constant-voltage conversion topology system and a control method thereof. The constant-current-to-constant-voltage conversion topology system comprises a shunt meter circuit, a first filter circuit, an inverter circuit, a resonance circuit, a high-frequency transformer, a rectifying circuit, a second filter circuit, a voltage and current acquisition circuit, a controller circuit and a driving circuit. The shunt meter circuit is connected with an input current source to realize conversion from a current source to a voltage source, and meanwhile, a higher voltage is generated at the front end. The first filter circuit is connected with the output of the shunt meter, and the LLC resonant circuit is connected with the first filter circuit, is firstly inverted into high-frequency alternating current through the inverter circuit, and then supplies power to a load after being isolated by the resonant circuit and the transformer and rectified and filtered by the rectifying circuit. According to the invention, constant-current to constant-voltage conversion can be realized, and wide input and load changes can be endured. And meanwhile, a switching tube of the post-stage LLC resonant converter can realize ZVS (Zero Voltage Suppressor) opening, and a secondary rectifier diode is also a ZVS switch, so that relatively high efficiency can be achieved.

Disclosed is a power detector. The power detector in which calibration is performed to minimize errors caused by a process variation and a temperature variation in a structure that allows a wide input dynamic range of the power detector at a low supply voltage is provided.

Proposed is a haptic reactive electrical switch including: a movable part including a floating panel having a touch area to which a user's touch is input and a holder coupled to the floating panel; a fixed part including a substrate and a casing configured to accommodate the substrate and be provided with at least two damping members; a vibration transmission plate configured to be interposed between the holder and the casing, thereby interconnecting the movable part and the fixed part; and an actuator configured to be operated to vibrate the holder and the vibration transmission plate coupled to the holder in a horizontal direction according to a user's touch input, wherein each of the damping members is configured in a form of a single object integrated into the casing, and an end part of one side thereof protrudes to a portion above the casing.