17results about How to "Protect the load" patented technology

The utility model discloses a vehicle integrated controller framework, a vehicle management system and an automobile, the vehicle integrated controller framework comprises a battery module, a whole vehicle control module, a battery management module, an electronic parking control module and an electronic parking driving module, the battery module is electrically connected with the battery management module, and the whole vehicle control module is electrically connected with the battery management module. The whole vehicle control module, the battery management module and the electronic parking control module are integrated into one structural member, and the whole vehicle control module, the battery management module and the electronic parking control module multiplex the same controller, so that the electrical architecture of the vehicle control system is optimized, the related parts of the whole vehicle are simplified, and the cost is reduced. The number of used controllers is reduced, the integration degree of the whole vehicle is improved, and the cost of the whole vehicle is greatly reduced.

The invention discloses a closed-loop control surge suppression circuit based on an NMOS tube, and belongs to the technical field of power electronics, the circuit is bridged between a power supply and a load, the protection threshold of surge voltage is changed by adjusting the resistance value of a resistor, and when the surge voltage in the power supply exceeds the protection threshold, the surge suppression circuit is turned off. The output voltage is changed through closed-loop control of an NMOS tube in the voltage division suppression sub-circuit, and then the working state of the closed-loop control surge suppression circuit based on the NMOS tube is adjusted to suppress the surge voltage. The boost circuit is introduced into the power supply sub-circuit, and the output end of the boost circuit is connected with the second end of the fourth resistor and the second end of the second resistor in the feedback control sub-circuit, so that closed-loop feedback is completed by taking an NMOS tube as a core and utilizing discrete devices which are relatively low in cost and easy to obtain, and a protection threshold value of surge voltage can be accurately set by adjusting reference voltage; and the voltage higher than the protection threshold is clamped, so that the voltage on the load is not higher than the protection threshold to protect the load.

The invention relates to a minimum voltage or loss voltage shunt trip device (1) for a circuit breaker (2). The trip device (1) comprises: a load block (7) electrically connected between the first terminal (3) and the second terminal (5), comprising a load (16) arranged to activate the circuit breaker (2); a protection module (9) comprising: a thyristor (27) and a varistor (29) for overvoltage protection, which are connected in series with one another and in parallel with the load block (7); and a first capacitor (33) connected in parallel with the varistor (29); a fusible element (15) and a first resistive line (11) connected in series with each other between the first terminal (3) and the protection module (9); and-a second resistive line (13) connected between the protection module (9) and the second terminal (5).

The application relates to the technical field of loader load support, and discloses a loader load support device, which comprises a load support frame, a horizontal rod is fixedly arranged at the top end of the inner wall of the load support frame, air cylinders are symmetrically arranged at the bottom of the horizontal rod, an inner hanging frame is connected to the output end of the air cylinders, a plurality of cantilevers are equidistantly arranged on the outer walls of the two sides of the inner hanging frame, and a group of bearing blocks are arranged at the two ends of the bottom of the load support frame. The device is quickly mounted on the loader through a hook, the inner hanging frame is driven to flexibly ascend and descend by the air cylinders, and loads of different heights can be adapted; the cantilevers are matched with anti-skid hooks, loads of various shapes can be stably fixed through multi-angle adjustment and hooking. Meanwhile, a damping system composed of damping springs and the bearing blocks can effectively absorb vibration impact during driving, and the safety of the load is protected. Stable bearing structures are formed by the horizontal rod, inner support rods and other components, the whole device is convenient to operate and functionally integrated, and the safety and applicability of the loader during load transportation are obviously improved.

The present invention proposes a soft start method and system for an inverter. It belongs to the field of power electronics technology. After the inverter is powered on, a hardware self-check is performed, and the voltage, current and external power supply status of the DC side are monitored through sensors; and the startup configuration parameters and preset strategy library stored in the non-volatile memory are read and analyzed; before starting, a preliminary judgment is made on the load type and size through a small current pre-start or voltage detection method, and an initial startup strategy is selected from the preset strategy library according to the load characteristics. Through small current pre-start or voltage detection, the large current impact at the startup moment is avoided, the inverter and the connected load are protected, and the life of the equipment is extended.

A rotating sleeve (17), rock drilling machine (6) and method of manufacturing a rotating sleeve. The rotating sleeve is mountable around a shank adapter (8) of a rock drilling machine and comprises several internal teeth (22) provided with opposing first flank surfaces (32) and second flank surfaces (33) for transmitting rotation to the shank adapter. The internal teeth are provided with end reliefs (38, 39) comprising chamfers between the flank surfaces and end surfaces (34) of the teeth.

The utility model relates to the technical field of direct-current power supply application, in particular to a power test circuit, a power utilization module using the same, a controller and a power utilization system. The power test circuit comprises a power supply circuit, a control circuit and a switch circuit. The power supply circuit provides electric energy for the control circuit and the switching circuit; the control circuit judges the available power of the external direct-current power supply by detecting parameters such as no-load voltage and current and voltage during load operation; when it is detected that the load power requirement exceeds the power supply power, the control circuit sends an adjusting signal to the switching circuit, and the switching circuit reduces the output power or controls on-off according to the adjusting signal, so that it is guaranteed that the external direct-current power supply works continuously and stably, and overload damage is avoided. According to the circuit, the load can still obtain moderate power supply in a certain voltage and current range under the condition of insufficient power supply power, the external power supply is protected, the compatibility of electric equipment is improved, and the circuit has the advantages of being simple in structure, low in cost, diversified in application scene and the like.

The invention discloses a power converter circuit protection system, which comprises an internal protection circuit module and an external protection circuit module, and is characterized in that the internal protection circuit module comprises an internal overcurrent protection circuit, an overheating protection circuit, an undervoltage protection circuit and an input overvoltage protection circuit; the external protection circuit comprises an external overcurrent protection circuit, a current-limiting protection circuit, an output overvoltage protection circuit and a soft start circuit, and the overcurrent protection circuit is used for limiting the limiting current of the power switch. The switching power supply converter protection circuit has the following advantages that the power supply chip adopts a current control mode, a compensation network is simple, and the reliability is high; an internal protection circuit module and an external protection circuit module do not need too complex peripheral circuits in field application, and a chip does not frequently switch on and switch off through an under-voltage protection circuit and an overvoltage protection circuit under the condition that input voltage fluctuates, so that normal operation of an internal control circuit is protected.

The utility model provides an energy storage circuit for an uninterruptible power supply and the uninterruptible power supply, and the energy storage circuit comprises a first converter unit which is connected between a positive direct current bus and the ground and is used for receiving alternating current from an external power supply, rectifying and boosting the alternating current and then supplying power to the positive direct current bus; the second converter unit is connected between the negative direct-current bus and the ground and is used for receiving alternating current from an external power supply, rectifying and boosting the alternating current and then supplying power to the negative direct-current bus; the first energy storage device is connected between the positive direct current bus and the ground and is used for storing the electric energy from the first converter unit; the second energy storage device is connected between the negative direct current bus and the ground and is used for storing the electric energy from the second converter unit; the inverter is used for receiving the electric energy from the direct-current bus, inverting the electric energy into alternating current and outputting the alternating current to a load; wherein each of the first energy storage device and the second energy storage device comprises a plurality of capacitors which are connected in parallel.

The utility model relates to a UPS (Uninterrupted Power Supply) cabinet, which comprises a cabinet, a first placing cavity, a second placing cavity and a third placing cavity are arranged in the cabinet, a transformer module is placed in the first placing cavity, and a plurality of groups of rectifier modules, inverter modules and first battery assemblies are placed in the second placing cavity. The inverter module is electrically connected with the rectifier module, and a second battery assembly is placed in the third placing cavity; the inverter module comprises a plurality of first IGBTs, a plurality of second IGBTs and a plurality of inverters, the first IGBTs are electrically connected with the first battery assembly, the first IGBTs are electrically connected with the second IGBTs, and the second IGBTs are connected with the inverters. The beneficial effects of the utility model lie in that the efficiency, reliability and safety of the system can be improved, and better maintenance and upgrade capability can be provided.

The invention discloses a portable AC-DC voltage converter which comprises an AC-DC input loop, a charging module, a lithium battery, an inversion module, an isolation boosting transformer, a central processing unit control unit, a touch screen and an output relay. The input loop charges the lithium battery through the charging module, the lithium battery provides a power supply for the isolation boosting transformer through the inversion module, the boosting transformer outputs multi-stage alternating voltage and distributes the multi-stage alternating voltage to a load through the output relay, and the central processor control unit acquires parameters such as voltage and current in real time based on neural network prediction and fuzzy control rules. The SPWM signal modulation duty ratio of the inversion module is dynamically adjusted, and stable voltage output is achieved. Multi-power-supply compatibility is achieved through the alternating current and direct current self-adaptive charging module, the dynamic response capacity and control precision are improved through neural network predictive control, the voltage stability is ensured through fuzzy control rules, the functions of overload protection, short circuit protection and real-time adjustment are achieved, and the application range is wide.

This invention provides a hydraulically driven artificial muscle robotic arm module and a modular robotic arm. The robotic arm module includes joint links, a root muscle connector, a hydraulically driven artificial muscle, joint connectors, end muscle connectors, and tension springs. The joint links include four links. The joint connectors include a joint shaft, which is mounted on the first link assembly and the second link assembly. The root muscle connector includes a first root connecting block, a second root connecting block, a root support block, a connecting shaft, a root muscle fastening stud, and a root muscle fastening nut. The end muscle connector includes a first end connecting block, a long connecting shaft, an end support block, a second end connecting block, an end muscle fastening stud, and a second end fastening nut. The technical solution of this invention has significant advantages such as high modularity, compact structure, simple control, large joint torque output, and flexible load bearing.

The invention belongs to the technical field of overcurrent protection, and provides a load overcurrent protection self-locking circuit, an overcurrent protection device and a robot. A load switch module is connected between a power supply end and a load end, and an overcurrent protection trigger module is connected in series with the load switch module; and the overcurrent protection trigger module generates an overcurrent protection trigger signal when the current between the power supply end and the load end reaches an overcurrent threshold value. The over-current protection self-locking module controls the over-current protection trigger module to continuously output the over-current protection trigger signal under the condition that the power supply end is powered on according to the over-current protection trigger signal, and the switch control module controls the load switch module to be turned off according to the over-current protection trigger signal. Therefore, the self-locking function is started to power off the load end under the condition that the load current is over-current, power supply can be recovered only when the load is powered off and restarted, and the purpose of protecting the load is achieved.

The invention discloses a high-reliability contactor control driving circuit, and the circuit comprises a positive end control circuit which is used for controlling a first switching tube to be switched on or switched off according to a received first control signal; the negative end control circuit is used for controlling the second switching tube to be switched on or switched off according to the received second control signal; the first switch tube and the second switch tube are used for controlling the working state of the load; the state sampling and measuring circuit is used for acquiring a control state signal of the load; the current sampling and measuring circuit is used for acquiring a working current signal of the load; and the control module is used for comparing the collected control state signal and the working current signal with an externally input control signal so as to judge the working state of the load. Current and control state acquisition channels are added, redundant channel design is used on the acquisition channels, the whole control drive circuit forms a small closed-loop control system, the circuit reliability is higher, and the anti-interference capability is higher.

The present application relates to a time-delay switch circuit and electronic device with overvoltage protection, and relates to the technical field of voltage protection. The power supply circuit applied to electronic devices includes an overvoltage detection unit, a delay unit, a control unit, and a switch unit; the input end of the overvoltage detection unit is connected to the external voltage input end VIN, the output end of the overvoltage detection unit is connected to the input end of the delay unit, the input end of the delay unit is also connected to the voltage input end, the output end of the delay unit is connected to the input end of the control unit, the output end of the control unit is connected to the control end of the switch unit, the ground end of the switch unit is connected to the ground end GND, the voltage end of the switch unit is connected to the negative power supply end VOUT‑ of the electronic device, and the positive power supply end VOUT+ of the electronic device is connected to the external voltage input end VIN. The present application has the effect of overvoltage protection for electronic devices.

The embodiment of the present invention discloses a low-dropout linear regulator LDO circuit and method with an overcharge protection function, which belongs to the technical field of integrated circuit design. The LDO circuit includes a voltage stabilizing circuit and an overcharge protection circuit; the overcharge protection circuit includes an RC circuit, a first resistor, a first switch, and a second resistor; the first port of the RC circuit is connected to the output port of the voltage stabilizing circuit, the second port of the RC circuit is connected to the first port of the first switch, and the third port of the RC circuit is grounded; the first port of the first resistor is connected to the output port of the voltage stabilizing circuit, the second port of the first resistor is connected to the second port of the first switch; the first port of the second resistor is connected to the third port of the first switch, and the second port of the second resistor is grounded; the voltage of the output port in the voltage stabilizing circuit is less than the breakdown voltage of the load in the voltage stabilizing circuit. The embodiment of the present invention can reduce the voltage output by the output port of the voltage stabilizing circuit when powered on, thereby protecting the load hung on the voltage stabilizing circuit.

The embodiment of the utility model provides a load protection circuit and an air conditioner, and the load protection circuit comprises a voltage processing circuit which is used for connecting two electrodes of a direct-current power supply, processing the line sequence voltage of the connected direct-current power supply, outputting a first processing signal, and / or outputting a second processing signal when the voltage of the direct-current power supply exceeds a preset voltage. Outputting a second processing signal; the two input ends of the control circuit are correspondingly connected with the two input ends of the voltage processing circuit respectively, the controlled end of the control circuit is connected to the output end of the voltage processing circuit, and the two output ends of the control circuit are used for being correspondingly connected with the positive electrode and the negative electrode of a load respectively. And connecting the negative electrode of the load with the negative electrode of the direct-current power supply, and disconnecting the direct-current power supply and the load according to the second processing signal. Overvoltage protection can be performed on the load, and adaptive adjustment can be performed when the positive and negative electrodes of the direct current power supply are reversely connected, so that the load can be protected.