62results about How to "Safe and reliable drive" patented technology

This inventive high power diode laser driver is used for driving high power diode laser or diode laser array and providing complete protective units, with its kernel part of voltage controlled current source. The circuit board of the voltage controlled current source consistes of: a voltage reference circuit (1), current-limiting circuit (2), soft starting circuit (3), anti-surge circuit (4), modulation input circuit (5), feed-back control circuit (6) and current driving circuit (7). This inventive negative feedback principle stable output current can provide: constant current driving mode (CCD mode) and constant power driving mode (CPD mode), which CCD mode can preset precisely the working current and limiting current of LD with long duration stability of 38ppm, and which CPD mode can automatically regulate output current to ensure constant power working of LD, and said (2) and (3) provides safety driving of LD.

To make it possible to highly accurately detect a rotation angle and to drive more safely. Provided is an actuator (300) that is provided with: a reduction gear (320), which reduces, at a predetermined reduction ratio, a rotation speed of an input shaft connected to a rotation shaft of a motor (360), and which transmits the rotation speed to an output shaft (350); a first absolute angle encoder (330) that detects a rotation angle of the input shaft; and a second absolute angle encoder (340) that detects a rotation angle of the output shaft.

The invention relates to an IGBT driving protection system which comprises an IGBT driver and an IGBT fault feedback module, wherein the IGBT driver comprises a Vce detection unit for short circuit protection, an active clamping circuit for over-voltage protection, a first connector for being connected with a PCB with a digital processor, and a second connector for being connected with a built-in NTC thermal sensitive resistor of the IGBT module. The IGBT driving protection system is compact in appearance, simple to mount, good in universality, simple in external circuit and applicable to all 17mm double-tube IGBT modules, a small amount of elements are needed, the cost is reduced, and due to a DC/DC power supply is assembled, electric partitioning of the power supply and a gate electrode driving circuit is achieved.

The invention provides a traction converter with a secondary filter circuit. The traction converter comprises a rectifier circuit, a secondary filter circuit and an inverter circuit, which are sequentially connected between the positive and negative ends of a bus. The rectifier circuit includes at least one four-quadrant rectifier connected in parallel. The secondary filter circuit, which is used for filtering out second harmonic, includes at least two filter capacitors connected in parallel, at least two filter inductors connected in parallel and at least one discharge resistor, wherein the at least one discharge resistor is connected in series and then connected in parallel to the two ends of the filter capacitors, and the filter inductors and the filter capacitors are connected in series. The inverter circuit includes at least one three-phase inverter connected in parallel, and each three-phase inverter is connected to at least one traction motor. By filtering out second harmonic in bus voltage, the voltage input to the inverters is accurate and reliable, and the traction motors can be driven safely and reliably.

A circuit arrangement is provided for controlling at least one actuator in a motor vehicle, comprising a microcontroller, a watchdog circuit with an active operating mode for monitoring the functionality of the microcontroller and a reduced activity operating mode, and with at least one microcontroller-controlled peripheral unit with a first operating mode for controlling at least one actuator. According to the invention, the peripheral unit has a second operating mode and is designed to change the actuator to a safe mode and/or to keep it in this mode when the peripheral unit is in the second operating mode, and the circuit arrangement is designed to operate the peripheral unit in the second operating mode at least whenever the watchdog circuit is in the reduced activity operating mode. The invention relates furthermore to a corresponding method for controlling at least one actuator in a motor vehicle.

The invention provides a high speed train bogie power supply mode traction converter main circuit which comprises a pre-charge circuit, a rectifier circuit, a busbar voltage processing circuit and an inverter circuit which are connected in sequence, wherein the pre-charge circuit is used for preventing input current from being too large when a traction converter is primarily powered; the rectifier circuit comprises two four-quadrant rectifiers which are connected in parallel, and can be controlled to filter a part of higher harmonic of primary side current of a transformer; the busbar voltage processing circuit comprises a secondary filter circuit and a support capacitor and is used for filtering secondary harmonic and ripple waves of busbar voltage; the inverter circuit comprises two three-phase inverters in parallel; one three-phase inverter is used for driving two traction motors working on a bogie to operate. By control of the rising rate of current when the converter is powered and filtration of the higher harmonic of the input current and the secondary harmonic and ripple waves of the busbar voltage, the voltage input into the inverters can be accurate and reliable, and safe and reliable driving of the traction motor can be ensured.

The invention discloses a converter device used for performing driving control on an electric vehicle, wherein the converter device is good in cooling effect, small in volume, high in conducting capacity and high in reliability. The converter device comprises a cooling base plate and three bridge arms arranged on the cooling base plate in parallel; each bridge arm comprises an upper bridge arm, a lower bridge arm, a driving circuit board, a cathode copper bar plate and an electrolytic capacitor; an upper bridge arm metal bar and a lower bridge arm metal bar of each bridge arm are fixed on the cooling base plate; the lower surfaces of the upper bridge arm metal bar and the lower bridge arm metal bar are respectively adhered to the upper surface of the cooling base plate through a conduction insulating pad; the lower surfaces of metal outer housings of all upper bridge arm MOS (Metal Oxide Semiconductor) tubes and lower bridge arm MOS tubes are respectively adhered to the upper surfaces of the upper bridge arm metal bar and the lower bridge arm metal bar; three pins of each upper bridge arm MOS tube all face to the lower bridge arm metal bar; all lower bridge arm MOS tubes are staggered with the opposite upper bridge arm MOS tubes at an effective interval L and arranged on the lower bridge arm metal bar; three pins of each lower bridge arm MOS tube all face to the upper bridge arm metal bar.

The invention discloses reaction equipment and a reaction method for preparing alkylated gasoline by a sulfuric acid alkylation process. The equipment comprises a liquid inlet pipe, an impact spray nozzle, a shell, an upper-layer filler, a lower-layer filler, a cooling coil pipe, a cooling jacket, a flow guiding cylinder and stirring paddles; the flow guiding cylinder is conical and used for introducing a liquid thrown out from the upper-layer filler into the inner edge of the lower-layer filler; the liquid inlet pipe is located at the upper part of the shell, and the impact spray nozzle is located at the inner edge of the upper-layer filler; the upper-layer filler and the lower-layer filler are connected with a magnetic driving device through a rotating shaft, and the cooling coil pipe isarranged between the outer edge of a rotating filler layer and the shell; and the cooling jacket is arranged at the outer side of the shell, the flow guiding cylinder is arranged below the lower-layer filler, the flow guiding cylinder is connected with the bottom of the shell, the part, located in the middle of the flow guiding cylinder, of the magnetic rotating shaft is provided with two layersof stirring paddles, the two layers of stirring paddles are connected with the magnetic driving device, and the upper part of the flow guiding cylinder is connected with a liquid outlet. The equipmentprovided by the invention realizes high-efficiency rapid mixing of mixed hydrocarbons and concentrated sulfuric acid under low-temperature conditions, improves the efficiency of the alkylation reaction, reduces acid consumption, and improves the octane number of the product.

The invention discloses a light-emitting diode (LED) constant current drive circuit and an LED lighting device, wherein the LED constant current drive circuit comprises a power source and an LED load, the power source is connected with the LED load, and the LED constant current drive circuit further comprises a boost-type constant current output circuit and a power control circuit. The boost-type constant current output circuit is used for outputting constant current to the LED load, and the power control circuit is connected with the power source, the LED load and the boost-type constant current output circuit and used for conducting power supply control and protecting power supply of the LED load. The LED constant current drive circuit serves as the boost-type constant current output circuit so that boosting and decompression control can be achieved by controlling the duty ratio of pulsing communication and pulsing closing of a metal oxide semiconductor (MOS) pipe in a constant current chip according to the value of the sampled voltage, and therefore the output current is controlled to a preset value so as to keep constant current output, the LED can be driven to work safely and reliably.

The invention discloses a dual power source parking device and a power output method thereof, which belong to the technical field of machinery and relate to a mechanical parking lot. In order to overcome the inflexible up and down movement mechanism of the existing parking device, the structure is relatively complicated, the work efficiency is low, and the safety is relatively high. Poor, it is not convenient for the transformation of the existing underground parking garage, and the three-dimensional parking garage cannot be used after a power failure. The dual power source parking equipment includes the first parking board, the second parking board, four sets of support frames, support columns, motors and four A hydraulic mechanism, one end of the support column is also provided with a rotating shaft connected with the output shaft of the motor, the rotating shaft is provided with a steel chain, and the steel chain is also connected with the second parking plate, the dual power source parking equipment of the present invention has a flexible mechanism for moving up and down , simple structure, small space occupation, high work efficiency, reliable and safe drive, easy to retrofit in existing underground parking garages, and effectively avoid property and personnel losses caused by power outages.

The invention relates to a hybrid-electric pure electric vehicle energy distributor and a control method thereof and relates to the field of electric vehicles. The hybrid-electric pure electric vehicle energy distributor comprises at least two pairs of IGBTs (insulated gate bipolar transistors), an IGBT drive board and a control unit. A first IGBT collector and a second IGBT emitter in each pair of IGBTs are connected to form a power source connecting end. A first IGBT emitter in each pair of IGBTs is connected with an anode of a diode. A second IGBT collector in each pair of IGBTs is connected with a cathode of another diode. The other electrodes of the two diodes are connected to form a high-voltage load connecting end. A gate of every IGBT is connected with the IGBT drive board. The IGBT drive board is connected with the control unit. The control unit controls on and off of all IGBTs through the IGBT drive board so as to allow forward or reverse flow of current between each power source and a high-voltage load. The power sources are capable of powering and recycling energy simultaneously or mutually independently, so that the problem of mutual charge and discharge of the power sources is avoided, charge efficiency is maximized, energy utilization rate is increased, and cycle lives of the power sources are prolonged.

The invention discloses a direct-current charging gun electronic lock driving circuit. The circuit comprises a locking comparison module, the input end of which is connected with the charging connection confirmation end CC2 of a direct-current charging gun socket, and the output end of which is connected with the first input end of a driving module and the first input end of a BMS main control chip; and the circuit further comprises a driving module, and the first power supply input end and the power supply input end of the driving module are respectively connected with an external direct-current power supply; the first input end of the driving module is connected with the output end of the locking comparison module, the second input end of the driving module is connected with the output end LOCK of the BMS main control chip, and the output end LOCK + and the output end LOCK- of the driving module are connected with the positive electrode input end and the negative electrode input endof an electronic lock respectively; the first input end of the BMS main control chip is connected with the output end of the locking comparison module, and the second input end of the BMS main controlchip is connected with the position feedback output end ELOCK of the electronic lock. The electronic lock can be safely and reliably driven to be locked and unlocked.

The invention discloses an electromagnetic Micropump device and a liquid pumping method thereof. An existing Micropump is complex in structure and high in cost and is difficult to control flow. The electromagnetic Micropump device comprises a driving cylinder, a switching type piston and a flow adjusting mechanism, wherein the driving cylinder comprises a cylinder body, an electromagnetic coil, a first wedge and a second wedge, the two ends of the cylinder body are correspondingly provided with a liquid inlet and a liquid outlet, the flow adjusting mechanism is arranged at the liquid outlet of the cylinder body, the electromagnetic coil is arranged at one end of the cylinder body, and the inner ends of the first wedge and the second wedge are fixed with the two ends of an inner cavity of the cylinder body correspondingly; the switching type piston comprises a first wedge rod, a second wedge rod, a piston body, a permanent magnet, a fixing block and a switching sliding block, and a fixed flow channel cavity, a movable flow channel cavity, a first transmission channel, a first wedge channel, a second transmission channel and a second wedge channel are formed in the piston body. According to the electromagnetic Micropump device and the liquid pumping method thereof, the action of the pump is controlled through the electromagnetic force period, so that the driving function is safe, the volume is small, the power consumption is low, and the response speed is high.

A method for calculating the electronic differential speed of an electric vehicle is provided, which belongs to the drive field of electric vehicles. The invention utilizes the phenomenon that the movement distance between the outer wheel and the inner wheel is fixed between 1: (0.6-1) when the vehicle is steering, the larger the rotation angle is, the smaller the ratio of the movement distance between the outer wheel and the inner wheel is, and the larger the movement distance difference is. The ECU computer calculates the acceleration sensor signal based on the left turn signal or the rightturn signal provided by the steering angle sensor. When steering, the outer wheel movement distance is set to 1 as the reference, and the ratio of the outer wheel movement distance to the inner wheelmovement distance is between 1: (0.6-1). Calculate 0.6-1. Acting on the controller, the inner wheel controller signal=1*a1/a*(1*0.68)*n. The invention realizes the electronic differential speed through simple calculation, so that the hub motor and the wheel-side motor are driven safely, stably, reliably and efficiently to give full play to the flexible driving of the motor drive.

An object of this invention is to enhance insulating properties between the terminals provided at both terminals of the secondary windings of the wound-rotor type transformer, and to drive the wound-rotor transformer safely, and the primary windings 110, secondary windings M1, M2 are mounted on the bobbins inserted with the bobbins. The terminal base 1 is provided at the side where the high tension terminals of the bobbins 102, 104 are disposed, and The first terminals S1, S2, S3 and S4 connected to the one terminals of the primary windings M1, M2 are mounted on the terminal base 1 at the side where the high tension terminals are disposed. The second terminals A, B connected to the other terminals of the secondary windings M1, M2 mounted on the bobbins 102, 104 are mounted at the side where the rearward low tension terminals are disposed at the side where the high tension terminals of the bobbins 102, 104 at a predetermined distance. The second terminals A, B are used as the ground terminals.

The invention relates to an IGBT driving protection system. The system comprises an IGBT driver and an IGBT fault feedback module; the IGBT driver comprises a Vce detection unit used for short-circuit protection, an active clamping circuit used for overvoltage protection, a first connector used for being connected to a PCB with a digital processing unit and a second connector used for being connected to a built-in NTC thermistor of an IGBT module. The IGBT driver further comprises a DC/DC power source. The first connector comprises 20 pins, wherein the fifth pin and the seventh pin are used for being connected with a 15-V power source, the ninth pin is used for state outputting of a first channel, the thirteenth pin is used for state outputting of a second channel, the eleventh pin and the fifth pin are used for signal inputting, the seventeenth pin is used for mode selection, the nineteenth pin is used for blocking time setting, the first pin and the third pin are standby pins, and the other pins are grounded.

The present invention relates to a circular knitting machine and a method for controlling the rotation of a lower cylinder (2) and an upper coaxial counter part (3) of the circular knitting machine, wherein the method comprises the steps of: driving with a first electric motor (M1) the rotation of the lower cylinder (2), driving with a second electric motor (M2) the rotation of the upper counterpart (3), detecting the angular position (phi1) of the lower cylinder (3), detecting the angular position (phi1) of the upper counter part, controlling electronically the rotation of the first and second motors by determining of a first set-point (S1) for the first motor and a second set-point (S2) for the second motor according to: the main set-point provided by the knitting program, the difference between the detected position phi1 of the lower cylinder and the detected position phi2 of the upper counter part, and eventually the desired phase shift zeta between the lower cylinder and the upper counter part provided by the knitting program. Knitting machine implements such method.

The invention relates to a non-polar LED vehicle headlamp high-low beam switching driving scheme, which comprises an input rectification protection circuit, a high-low beam switching control circuit and an LED lamp group constant current driving circuit. The input rectifier protection circuit comprises a JG port, a YG port, a COM port, DL1, DL2, D1, D3 and C1; The high-low beam switching control circuit is divided into a low beam group switching circuit and a high beam group switching circuit. The constant current driving circuit is also divided into a low beam group and a high beam group. This non-polar LED automotive headlamp high-low beam switching drive scheme guarantees the performance while achieving the advantages of fewer components, low cost, miniaturization, non-polar input, strong versatility of LED driver and built-in driving LED headlamp miniaturization products.