1265 results about "Solid-state relay" patented technology

A solid-state relay/breaker that can replace mechanical units to control any type of AC or DC load. Power MOSFETs or other transistors control a load current. A bypass current sensing path monitors MOSFET current and causes a shutdown through signal processing in the event of an over-current condition. This shutdown resembles that of a slow-blow fuse where the rate of shutdown is proportional to the value of the current. This prevents shutdown on momentary spikes or in-rush. In addition, temperature and internal power supply voltages are monitored to determine additional operational conditions where over-temperature or voltages out of range can also cause shutdown. The MOSFET and current sensing path are turned on and off in staggered timing with different slew rates to provide built-in hysteresis. The device can be manufactured in any type of package to match any type of environment or existing replacement requirement.

Embodiments of the present invention are directed to a method and apparatus for multiple battery cell management. In one embodiment, a solid state relay is used instead of a mechanical relay in a BMS. The SSR is smaller and faster than a mechanical relay, enabling smaller BMSs that more efficiently and safely manage battery cell charge. In another embodiment, a plurality of battery cells are connected to two rails, using four SSRs to control access to the battery cells. In one embodiment, a plurality of battery cells are grouped together and controlled as one module of a multi-module BMS. In one embodiment, each module has 10 battery cells in series. In one embodiment, the BMS controls 4 modules. In one embodiment, each module is controlled by control signals passing through logical gates. In another embodiment, each module is controlled by control signals passing through a programmed circuit.

A method and circuit is provided for reducing power consumption in a power transformer, typically incorporated into an electrical or electronic device such as a consumer device. In an embodiment, a detection/isolation circuit is coupled to an input of a power transformer/rectifier via a switching device. The switching device can be, for example, a solid state relay. The detection/isolation circuit is configured to sense the occurrence of no-load conditions in the power transformer and responsively disengage the power transformer from a coupled source of power (e.g., wall outlet) via the coupled switching device.

The invention discloses a cable detecting device and a method thereof for realizing detection. The scheme is as follows: continuous transient pulse current is generated in a circuit by cutting off controllable switch elements, such as a solid relay, a thyristor, a transistor, an IGBT, and the like after continuously and transiently communicating the controllable switch elements at the user end or the tail end of an electric power circuit, and a cable is detected by tracing the pulse current. In the method, because the pulse current can not be spread to other irrelevant circuits, a pulse current signal can not be interfered by the electric power circuit. The method for detecting the cable by the cable detecting device ensures the accuracy of cable detection. The invention also discloses a station user identification apparatus integrated with the cable detecting device, which prevents erroneous judgment and unavailable judgment in station identification and ensures the identifying accuracy.

A smart-home device may include an energy-storage element that stores energy that is harvested from an environmental system and a solid state relay (SSR) switching integrated circuit (IC). The SSR switching IC may include switching elements that operate in a first state and a second state. The IC may also include a control circuit that causes the switching elements to operate in the first state to activate a function of the environmental system until the energy-storage element has dropped below a threshold. The control circuit may also cause the switching elements to operate in the second state and harvest energy from the environmental system, determine that a first time has elapsed since the switching elements began operating in the second state, and cause the one or more switching elements to again operate in the first state.

A solid state relay composed of a series connected pair of LDMOSFETs has a minimized output capacitance. Each LDMOSFET is configured to have a silicon layer of a first conductive type, a drain region of the first conductive type diffused in the top surface of the silicon layer, a well region of a second conductive type diffused in the silicon layer in a laterally spaced relation from the drain region, and a source region of the first conductive type diffused within the well region to define a channel extending between the source region and a confronting edge of the well region along the top surface of the silicon layer. Each LDMOSFET is of an SOI (Silicon-On-Insulator) structure composed of a silicon substrate placed on a supporting plate, a buried oxide layer on the silicon substrate, and the silicon layer on the buried oxide layer. The well region is diffused over the full depth of the silicon layer to have its bottom in contact with the buried oxide layer, so that the well region forms with the silicon layer a P-N interface only at a small area adjacent the channel. Because of this reduced P-N interface and also because of the buried oxide layer exhibiting a much lower inductive capacitance than the silicon layer, it is possible to greatly reduce a drain-source capacitance for minimizing the output capacitance of the relay in the non-conductive condition.

The invention discloses a method making use of numerical control tube bender to heat constant temperature bent tube in the material technology field. The method has the detail steps that a hole is cut on a height direction in the internal part of a round die, and holes are respectively cut on a height direction in the internal parts of a guide die, an anti-crease die and a mandril. A heating medium and a temperature sensor are respectively arranged in the holes. Insulation medium is arranged on the touch area of the lower surface of the round die and a machine body, on the clinching area of the back face of the guide die and a slide block and on the contacting area of the anti-crease die and a support frame thereof. The heating medium and the temperature sensor are respectively connected with a temperature control system which consists of a digital-display temperature control instrument and a solid relay. A temperature control instrument controls the opening and closing of the solid relay through comparing a self-set value with a collected value by the temperature sensor so as to realize a temperature control to the die; the tubes are hot bended -for molding. The invention realizes heating bending in a constant temperature for tubes which are difficult to be transfigured with high shaping accuracy, and is suitable for a batch production.

The invention discloses a three-phase AC motor power phase-losing detection and phase-correcting method and device, which is characterized by the following: judging whether outer power is phase-losing and phase-sequence changing through detecting three-phase AC power phase-position sequence; avoiding error judgment for loop of the three-phase motor and solid relay; designing the device according to the character of microprocessor and digital signal processor.

There is described herein a direct current power supply which offers improved control over an output signal. An input signal generated by an alternating current source is received and chopped by a solid state relay. The chopped signal is rectified by a bridge rectifier before being filtered by an “LC” (induction coil-capacitor) or “CLC” (capacitor-induction coil-capacitor) filter. The output signal can then be used as a direct current power supply signal. This power supply may be used in various types of ozone generation systems.

The invention relates to temperature control equipment for plastic sheet hot-forming machine heating system. It includes terminal, programmable logic controller, at least one temperature measurement input module, at least one temperature sensor, at least one solid state relay set. Each temperature sensor is corresponding with one solid state relay set. Each temperature measuring signal input is corresponding with many temperature control signal outputs. The many outputs can not only control temperature in a whole for the heater, but also can independently adjust the temperature for each area of the heater. Thus the invention can not only precisely control the temperature, but also greatly reduce device manufacturing cost, and has simple operation.

The invention which relates to an automatic constant temperature type photoacoustic detection device for SF6 decomposed components and an experiment method thereof belongs to the technical field of SF6 gas insulation device partial discharge online monitoring. The device is characterized in that an automatic constant temperature system is arranged in present infrared photoacoustic spectrum monitoring systems; and according to the method, the device is utilized to detect the SF6 gas partial discharge decomposed components in a GIS (gas insulated substation) simulation element under automatic preset temperature constancy conditions. According to the invention, the influence of external environment can be eliminated, the gas components of SO2, CO2, CF4, SO2F2, SOF2 and the like with the concentrations of low to 0.01muL/L can be effectively detected, the accuracy, the detection precision and the stability are high, and performances of a solid state relay are stable, so the long-term effective working of the automatic constant temperature system can be guaranteed. The device which can be widely applied to the field of the SF6 gas insulation equipment partial discharge online monitoring is especially suitable for detecting the SF6 gas partial discharge decomposed components in the GIS.

Power interruption device and/or method switches, controls, or otherwise interrupts one or more electrical signal, such as AC power or other electrical signal, applied to one or more load preferably via semiconductor or other solid state device, such as bipolar junction transistors (BJT), isolated gate bipolar transistor (IBJT), MOSFET, or other integrated circuit device. Advantageously such power interruption solution avoids conventional forced-based relay approaches, such as electromechanical relays, solid state relays, semiconductor control rectifiers (SCR), semiconductor triode for alternative current (TRIAC), etc., which are handicapped by limitations, including power carrying to the load, control mechanism, as well as size and inability to adapt to various signaling interfaces and communications. Preferred power interruption approach avoids electromechanical limitations, and thus offers improved speed, reliability, and functional versality to support various communication interfaces. For example, solid state power interrupter includes integrated circuit formed on semiconductor substrate, with switch embodied in circuit reconfigurable electronically to interrupt power signal coupled to switch from coupling to electrical load. Said circuit having one or more diode biased parasitically to cause power signal interruption, optionally in double pole single through (DPST) configuration, single pole single through (SPST) configuration, or double pole double through (DPDT) configuration. Optional pseudo airgap switch and/or interface coupled to the circuit for communicating with or controlling said switch.

A method and apparatus provides for high-speed switching of high-voltage and high power MOSFET-based solid state relays. A driver for a MOSFET based, high voltage, high current electronic relay includes a current supply for actuating the switching circuit and a transformer arrangement coupled to the current supply for receiving the supply of current from the current supply. The transformer arrangement is adapted for coupling with the switching circuit for selectively applying a predetermined voltage to the switching circuit which establishes the switching circuit in switch conducting or switch isolation.

The invention relates to a voltage collecting circuit for monomer batteries of a battery pack. After voltages of the monomer batteries of the power battery pack are isolated and sampled by employing a solid-state relay, a signal conditioning and isolating circuit and a microcontroller in a matching manner, the voltages are fed into an A/D (Analog-to-Digital) passage of the microcontroller for analog-to-digital conversion; the microcontroller is used for rapidly controlling two paths of solid-state relays connected with two electrodes of any monomer battery to operate at the same moment, thus, a terminal voltage of the corresponding monomer battery can be obtained on a sampling bus; simultaneously, as for electrical security, a terminal voltage signal, obtained from the battery pack, of the monomer battery needs to be isolated by an isolation amplifier, then can be input to the A/D passage of the microcontroller; and the process above is suitable for the voltage collecting circuit for the monomer batteries of the power battery pack. The circuit is low in cost, simple and practical, as well as safe and reliable.

An active safety circuit with loads protected by solid state relays comprising several solid state relays (1, 2, 3) supplying loads, controlled in turn from a microcontroller (4) for opening said relays (1, 2, 3) in the case of an anomaly in said loads, comprising a fuse (5) inserted in a supply network (6) of relays (1, 2, 3) and a grounded shunt line (7) from one point (8) of the network (6) between said fuse (5) and relays (1, 2, 3), and a safety switch (9) controlled by said microcontroller (4) and inserted in the line (7). A temperature detector (10) is either associated to each relay (1, 2, 3) or is commonly shared by several of said relays (1, 2, 3), and the detector (19) is connected to the microcontroller (4).

The invention discloses an intelligent greenhouse roller curtain control system based on a multi-sensor information fusion technology. In the system, a single chip microcomputer detects roller curtain machine position feedback information fed back by a temperature sensor, a light sensor, a moisture sensor, an upper limiting switch and a lower limiting switch, accordingly, the inner-outer environment state of a solar greenhouse is judged, then the single chip microcomputer sends control information to a solid-state relay which controls automatic rolling and falling action of a greenhouse straw curtain, and meanwhile real-time temperature of the greenhouse and relative humidity of atmosphere are displayed through a Nixie tube. According to the intelligent greenhouse roller curtain control system, automatic curtain rolling and falling of the roller curtain machine are achieved under the situations of day-night alternating, bad weather and temperature shock, the labor intensity of greenhouse farmers is greatly lowered, production efficiency is improved, and production cost is lowered.

The invention relates to an anti-interference electricity module in a bypass mode and a control method of the anti-interference electricity module. The anti-interference electricity module comprises a single-chip microcomputer, an electromagnetic relay, a solid-state relay, an energy storage capacitor set, an AC/DC switching power supply, a DC/DC power supply, a voltage conversion chip, an alternating voltage sampler and a state detector, wherein two ends of the alternating voltage sampler and two ends of the state detector are respectively in signal connection with a grid and the single-chip microcomputer. The input end and the output end of the AC/DC switching power supply are respectively and electrically connected with the grid and the energy storage capacitor set, and the output end of the energy storage capacitor set is electrically connected with the single-chip microcomputer and a contactor respectively through the voltage conversion chip and the DC/DC power supply. A normally closed contact of the electromagnetic relay is arranged on the grid, and a normally open contact of the electromagnetic relay and a normally open contact of the solid-state relay are connected in series on a direct current power supply loop. The anti-interference electricity module can supply alternating current and direct current to the contactor respectively in the normal running process and the electricity interference process, the defects of starting of pulsating direct current are overcome, and pull-in of the contactor is maintained, so the reliability is high and operational requirements of a continuous production line can be met.

An electrical system includes a solid state relay (1) and an electrical connector (2) that connects solid state relay (1) to a load (4). The solid state relay (1) includes a power MOSFET (Q1) for switching power to the load (4). A PNP transistor (Q2) monitors the voltage drop across the power MOSFET (Q1), and shuts the power MOSFET off when the voltage drop exceeds a reference level. The solid state relay circuitry floats when the power MOSFET is commanded OFF so there is no leakage to ground. The relay (1) can be used with an electrical connector that includes a short pin (34) or shunt (16) that is disconnected before male and female terminals (12, 22) are unmated. Disconnection of the shunt (16) or the short pin (34) causes the power MOSFET to be commanded OFF so that there is no current flowing through the male and female terminals (12, 22) when they reach an arc susceptible position. The solid state relay (1) and the connector (2) are suitable for use in a 42 Volt automotive electrical system.