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99 results about "Motor loop" patented technology

Real-time self-diagnosis method in operation of motor of electric power steering system

The invention discloses a real-time self-diagnosis method in operation of a motor of an electric power steering system. Two phase line relays are installed on phase lines of the motor of the electric power steering system, an estimation value of control voltage Vd of a direct shaft d, an estimation value of control voltage Vq of an alternating shaft q, an estimation value of current id of the direct shaft d and an estimation value of current iq of the alternating shaft q are respectively estimated based on a motor control model, each obtained estimation value is compared to a corresponding practical controlling value, and differential values serve as bases which are used for judging whether motor faults exist or not; and when the motor faults are confirmed to exist, the two phase lines installed on the phase lines of the motor are cut off, current between accesses of the phase lines of the motor is cut off, a motor return circuit is prevented from generating current, and the electric power steering system is switched to a mechanical steering system. The real-time self-diagnosis method can detect whether a short circuit or open circuit fault exists in the electric power steering system or not rapidly, and the circumstances that the steering system is locked and power assisting is disordered can be prevented.
Owner:LIANCHUANG AUTOMOBILE ELECTRONICS

Electric vehicle finished-vehicle thermal management system and control method thereof

The invention discloses an electric vehicle finished-vehicle thermal management system. The system comprises a motor-radiator loop, a PTC heating loop, a battery pack loop and an air-conditioner loop;heat transfer and heat exchange are achieved among all the loops through valves and a plate heat exchanger, so that the requirements of all parts for heating and cooling are met under different working conditions. By means of the thermal management system, communication of the motor loop, the battery loop and the PTC loop in a thermal management loop is achieved simply through the valves. The invention further discloses a control method of the electric vehicle finished-vehicle thermal management system. According to the control method, a difference value delta T1 between an actual battery operating temperature TB and a standard battery operating temperature T0 and a difference value delta T2 between a motor outlet water temperature TM and the actual motor operating temperature TB are adopted as identification parameters, and a fuzzy control method is utilized for determining a proper loop mode. By means of the control method, the thermal management loop mode is switched in real time according to the actual vehicle condition, and the battery energy consumption is reduced to the greatest extent.
Owner:JILIN UNIV

Electric motor controller and control method

The invention discloses a motor controller and a control method, which includes a control power supply connected to each module, a single-chip, a relay output module, a switching value input module, a watchdog module, and a keyboard input circuit. The invention is characterized in that the single-chip is respectively connected with a voltage mutual inductor and a current mutual inductor through a voltage filtering amplification module and a current filtering amplification module; the single-chip is respectively connected with a LCD display and a bus drive module through a data bus and a gating module; and the single-chip is also connected with a central control room computer through a communicating interface module. The real time measurement is executed to the voltage and current of the motor loop through the current mutual inductor and a circuit line voltage, and accurate and quick protection is carried out the motor defects such as over loading, locked-rotor, open-phase, light loading, three phase disbalance, earth / electrical leakage, undervoltage, over pressure, etc.; the direct, reversible, star / triangular starting up of the motor are realize with conjunction of exterior circuit, and the communication network carries out centralized monitoring to a plurality of motors distributed at different positions.
Owner:ANHUI ZHONGDIAN XINGFA & XINLONG TECH CO LTD

Unsaturated polyester bulk molding compound as well as method and application thereof

The invention relates to the technical field of a bulk molding compound for metal bonding, and specifically relates to an unsaturated polyester bulk molding compound as well as a method and application of the bulk molding compound. The bulk molding compound is prepared from the following raw materials in parts by weight: 8-20 parts of unsaturated polyester, 5-15 parts of low shrink agent, 55-70 parts of inorganic filler, 0.8-1.8 parts of internal demolding agent, 6-20 parts of fiber-reinforced material, 0.3-0.7 parts of curing agent, 0-3 parts of styrene, and 0.05-0.3 part of coupling agent. According to the invention, after the bulk molding compound (BMC) is molded, fast setting is realized and the appearance is excellent; and when used for electric tool and motor loop sealing and other fields, the bulk molding compound has excellent bonding property and torsion to the metal surface at normal temperature and high temperature, excellent resistance to impact, and excellent voltage withstand performance, conforms to the reliability required by product use, and fills up the blank of the field.
Owner:SHANGHAI SHOWA HIGHPOLYMER CO LTD

Method for inhibiting peak starting current of start-stop motor, relay and start-stop motor

ActiveCN103061944AImprove life shorteningReduce the starting currentElectric motor startersMachines/enginesElectrical resistance and conductanceCurrent limiting
The invention discloses a method for inhibiting peak starting current of a start-stop motor. The method includes that firstly a relay with a current limiting resistor is added to a main start-stop motor loop comprising a storage battery, an ignition switch, a contact of an electromagnetic switch and the start-stop motor, and two binding posts of the current limiting resistor and the relay are parallelly connected and then connected between the ignition switch and the contact of the electromagnetic switch; and secondly, a power supply of the storage battery supplies power for coils of the relay and the electromagnetic switch respectively. The invention further discloses a relay for achieving the method for inhibiting peak starting current of the start-stop motor and a start-stop motor for implementing the method for inhibiting peak starting current of the start-stop motor. According to the method, the relay and the start-stop motor, the current limiting resistor is cut in or cut out when ignition is performed in the start-stop motor loop, so that overlarge starting current can be inhibited at the moment of starting of the start-stop motor so as to achieve the purpose of prolonging the service life of the start-stop motor.
Owner:GAC COMPONENT CO LTD

Test stand for self-adaptive power recovering of hydraulic pump

A test stand for self-adaptive power recovering of a hydraulic pump mainly comprises a tested pump loop, a loading motor loop, a compensating pump loop and a detecting element. The tested pump loop comprises a tested pump and a left reversing valve. The loading motor loop comprises a loading motor, a throttle valve and a one-way valve, and the throttle valve and the one-way valve are connected in series to the pipe between the left reversing valve and the loading motor. The compensating pump loop comprises a compensating pump, a safety valve and a right reversing valve, wherein the compensating pump is coaxially connected with an electromotor mechanically; an oil outlet of the compensating pump is communicated to an oil inlet of the safety valve and an oil inlet of the right reversing valve respectively; an oil return port of the safety valve is communicated with an oil tank; the right reversing valve is a two-position three-way reversing valve, and two working oil ports are respectively communicated with oil inlets of the oil tank and the loading motor. The detecting element comprises a pressure gauge, a high-pressure flow gauge and a torque speed sensor. The test stand for self-adaptive power recovering of the hydraulic pump, with applicability to tests of various hydraulic pumps, has the advantages of simple structure, great power recovering effect and high operational reliability.
Owner:XUZHOU MINGSHUO MACHINERY TECH

Energy recovery and control circuit for electric vehicle and automobile chassis made thereof

The present invention is energy recovering control circuit for electromobile and electromobile chassis with the circuit, belongs to the field of electromobile technology, and aims at solving the problem of recovering all the converted electric energy. The energy recovering control circuit consists of mainly a control circuit comprising microcomputer and electric speed regulating controller, a trigger in the motor loop, a contactor in the generator loop, a diode, two accumulators to constitute one high voltage charging branch and one low voltage charging branch connected in parallel, and a DC reversing step up circuit between two charging branchs. The present invention is used in chassis of electromobile, including electromobile with renewable energy source.
Owner:襄阳倍能新能源汽车技术有限公司

Control method for enhancing kinematic accuracy by double-motor drive based on real-time control network

The invention discloses a double-motor drive control method on a real-time control network basis for improving the kinematic accuracy. The method comprises the following steps: 1) establishing the communication between a motion control card and a D / A converter based on a SynqNet real-time control network; 2) operating the motion control card to allow the D / A converter to output the same motion commands to two motor drivers; 3) operating the two motors respectively to drive two gears on the same rack, wherein the driving power is shared by the two motors; 4) operating the two motor drivers to control the two motors respectively and output the same adjustable bias torques in the opposite direction; 5) allowing the two motors to make the strictly synchronous movement by intersecting and accumulating the outputs from a synchronous compensator and the two motors; and 6) arranging a linear grating on the rack, wherein the position measurement information of the linear grating is input to the motion control card to achieve the effect of closed-loop control. The double-motor drive control method on a real-time control network basis greatly increases the accuracy of the rack-gear transmission system, ensures the adjustable bias torque, meets different requirements for load and speed and has good real-time property, controllability and reliability.
Owner:ZHEJIANG UNIV +1

Method for checking failures of washing machine electric motor loop and clothes amount detection circuit

ActiveCN101173474ATroubleshooting fault detection issuesAvoid wasting timeOther washing machinesTextiles and paperMotor loopEngineering
The invention discloses a method of detecting circuit fault for a washing machine motor, comprising the following steps: to input driving power to the motor and continue the input for a while; to stop inputting driving power to the motor and detect pulse count that is obtained in detection circuit of the amount of clothing per unit time after stop; to judge whether the pulse count per unit time is normal or not; if the pulse count per unit time is normal, the working state of the motor is normal; if not, the working state of the motor is abnormal. The invention meanwhile discloses a method of fault detection of the detection circuit of the amount of clothing, comprising the following steps: to input driving power to the motor and continue the input for a while; to detect pulse count that is obtained in detection circuit of the amount of clothing per unit time; to judge whether the pulse count per unit time is normal or not; if the pulse count per unit time is normal, the working state of the detection circuit of the amount of clothing is normal; if not, the working state of the detection circuit of the amount of clothing is abnormal. The invention solves the problems of fault detection of circuit for a washing machine motor and fault detection of detection circuit of the amount of clothing under the condition without increasing cost.
Owner:HAIER GRP CORP +1

Fast spraying freezing coldproof method

InactiveCN1740726AAutomatically adjust the air intakeHarm reductionTrickle coolersCooling towerEngineering
The air inlet of lower portion of cooling tower is enclosed and baffled by using metal screen, the outer side of said metal screen is equipped with a circle of water pipeline, on the water pipeline several branch water pipes are set, every branch water pipe is equipped with a water nozzle, the main water pipeline is connected to the water pool of tower bottom, in the pipeline connected with water pipe and water pool a water pump and a temperature control device are mounted, the temperature control device includes temperature controller, temperature sensor and AC contactor connected on the water pump and motor loop, the sensor can be used for detecting water temperature in the water pool and setting upper limit and lower limit of temperature controller action.
Owner:张富华

Industrial control network type integrated automation system platform and control method thereof

The invention discloses an industrial control network type integrated automatic system platform and a control method, belonging to the field of integrated automatic measurement and control. The platform comprises monitoring central equipment and N field control units, wherein N is a natural number; the monitoring central equipment comprises a monitoring host, a printer, a multi-port optical fiber transceiver and a UPS power supply. The method is to acquire real-time information through a PLC circuit, and receive a command through an optical fiber to control the motor loop. The platform and the method have the advantages of convenient maintenance, low cost, integrated functions, remote control management availability and higher cost performance, and is favorable for popularization and application.
Owner:HOHAI UNIV

Electric steering system

The invention discloses an electric steering system. The electric steering system comprises: two motors used for steering and a steering control module used for controlling the motors, wherein two micro-control chips are integrated in the steering control module, and the micro-control chips are connected through an SPI bus for mutual verification; two motor pre-driving chips used for diagnosing faults of motor loops; and two driving loops, each driving loop comprising a micro-control chip and a motor pre-driving chip, and each driving loop independently controlling one motor. When one motor loop fails, the driving loop of the other motor is controlled to control the vehicle to steer so as to pull over; and when one driving loop fails, the other driving loop controls the vehicle to steer soas to pull over. The motors and the driving loops are arranged in a redundant mode and the micro-control chips are connected through the SPI bus, so that when one motor loop or one motor driving loopfails, the vehicle can be rapidly controlled to pull over so as to ensure the safety of the vehicle.
Owner:SAIC GENERAL MOTORS +1

Automatic insulation detection system of frequency conversion motor

ActiveCN105158659AImprove technical management levelWill not affect the normal use of functionsTesting dielectric strengthDynamo-electric machine testingMotor insulationElectric control
The invention, which belongs to the electric control field, provides an automatic insulation detection system of a frequency conversion motor. A motor leakage current signal acquisition device, a measurement signal transmitter, an insulation detection hand-operated and automatic change-over switch, a frequency conversion motor main loop operation and insulation detection switching safety contactor, and a motor insulation detection work contactor are installed in a field motor control cabinet. When a motor insulation resistance needs to be detected automatically, the insulation detection hand-operated and automatic change-over switch is changed into an automatic state and circuit breakers QF of the groups of electric machines for roller are turned off; when detection data alarming is carried out, the insulation detection hand-operated and automatic change-over switch is changed into a hand-operated state and circuit breakers QF of single motor loops are turned off one by one. The system has the following advantages: the normal using functions of the original production line are not affected; the equipment checking and maintenance time can be reduced; and the production losses caused by a motor insulation accident can be reduced.
Owner:BEIJING SHOUGANG INT ENG TECH

A switch operating mechanism and a control circuit thereof

The invention relates to a switch operating mechanism and a control circuit thereof, A switch open / closing control loop and a motor loop are matched by a first branch circuit and a second branch circuit, As that switch open and closing control circuit is turned on and the corresponding opening or closing control is carry out, Second switch closed, detecting the position state of the switch operating mechanism, when the switch actuating mechanism is detected to be at the set station, The first switch is closed, at this time, the first branch is energized, the normally open contact of the firstrelay is closed, the second branch is switched on, the electromagnet coil of the switch operating mechanism is charged, the switch operating mechanism is unlocked, the motor in the motor circuit afterunlocking performs corresponding forward rotation or reverse rotation, and executes corresponding switching or cooperation instructions. Prior to the next station control of the operating mechanism,the invention detects whether the stop position of the operating mechanism is at the stop position of the closing position or the opening position, and if so, unlocks the switch operating mechanism, avoids the continuous maloperation of the operating mechanism, and ensures the stability of the operating mechanism.
Owner:HENAN PINGGAO ELECTRIC +2

Relay protection control device for motor

The present invention discloses a relay protection control device for a motor. The relay protection control device includes a motor loop module, a power source main module, a zero sequence current loop module, a voltage loop module, a current loop module and a signal output module; the motor loop module, the zero sequence current loop module, the voltage loop module, the current loop module and the signal output module are all connected with the power source main module; and the motor loop module is connected with the zero sequence current loop module and the voltage loop module. With the relay protection control device for the motor of the invention adopted, the motor can automatically quit operation when over-current, phase failure or phase loss, low voltage and grounding occur, or a fault sound-light alarm can be emitted, so that an operator can be prompted timely, and therefore, the operation safety of equipment can be ensured, and the service life of the equipment can be prolonged.
Owner:HUNAN GEELY AUTOMOBILE COMPONENTS +1

Hydraulic system used for revolving jogging control on crawler crane

InactiveCN102092647ASwing inching control is validSimple structureCranesMotor loopFuel tank
The invention provides a hydraulic system used for revolving jogging control on a crawler crane. The hydraulic system comprises a revolving pump motor loop, a revolving pump variable mechanism and a revolving slow valve, wherein the revolving slow valve comprises an electromagnetic directional valve and a pressure setting valve which are connected in series, one end of the revolving slow valve is connected with the input port of the revolving pump variable mechanism, and the other end of the revolving slow valve is connected with an oil tank. In the hydraulic system used for revolving jogging control on the crawler crane in the invention, a revolving slow valve is connected in parallel with the input port of the revolving pump variable mechanism to limit displacement of a revolving pump, thus revolving jogging control on the crawler crane can be effectively carried out, the structure is simple, the operation is simple, and the operation safety and high efficiency of the crawler crane can be effectively guaranteed.
Owner:SHANGHAI SANY TECH

Self-learning-pattern-based method and system for preventing hand clamping during door closing of motor

The invention provides a self-learning-pattern-based method and system for preventing hand clamping during door closing of a motor. The system comprises a microprogrammed control unit (MCU), a control circuit, a motor, a sampling circuit and an analog / digital (A / D) conversion circuit, wherein the sampling circuit acquires a loop voltage value of a loop of the motor; and the MCU receives the loop voltage value by the aid of the A / D conversion circuit and controls the motor by the aid of the control circuit. According to the method, in the door opening process, the maximum loop voltage value of the motor is acquired to be used as a locked-rotor valve value, in the door closing process, the loop voltage value of the motor is acquired and is compared with the locked-rotor valve value, whether a locked-rotor condition occurs is judged, if the locked-rotor condition occurs, the motor stops door closing, and if the locked-rotor condition does not occur, the motor closes a door continuously. With the method and the system, the problem of inconsistent locked-rotor valve values due to differences of motor consistency, performance change after long-time usage and the like can be effectively solved, the locked-rotor detection sensitivity is greatly improved, and personal safety is really guaranteed.
Owner:ZHENGZHOU TIAMAES TECH

Electric vehicle heat regulation and control system

The invention belongs to the technical field of electric vehicles, and discloses an electric vehicle heat regulation and control system which comprises a motor loop, a battery loop and a first reversing valve, the motor loop comprises a driving motor, a first water pump and a radiator which are sequentially and circularly communicated through a fluid pipeline, and the battery loop comprises a battery and a second water pump which are circularly communicated through a fluid pipeline. The first reversing valve is respectively communicated with the motor loop and the battery loop, the first reversing valve has a first reversing state and a second reversing state, the motor loop and the battery loop are independent from each other in the first reversing state, and in the second reversing state, the driving motor, the first water pump, the battery and the second water pump form a circulation loop through the fluid pipeline and the first reversing valve. According to the invention, the motorloop and the battery loop are subjected to reversing adjustment through the first reversing valve, so that when the temperature of the battery is too low, the heat of the motor loop can be transferred to the battery loop, the use performance of the battery can be ensured, and the endurance mileage of a vehicle in a low-temperature environment is increased.
Owner:CHINA FIRST AUTOMOBILE

Electric vehicle fuse state detection circuit

The invention relates to an electric vehicle fuse state detection circuit. Two ends of a motor fuse are connected in parallel to a branch formed by a motor loop state lamp and a motor loop resistor which are mutually connected in series. The motor loop state lamp is quenched when the motor fuse is conducted and is lightened when the motor fuse is fused. In the invention, when the fuse in one loop is conducted, a resistor resistance of a branch where the state lamp is located is greater than a branch where the fuse is located so that a current of the branch where the state lamp is located approaches zero and the state lamp is in a quenching state. After the fuse in the loop is fused, the current is increased so as to lighten the state lamp and then the state lamp is in a lightening state. The state lamp can be uniformly installed on an instrument panel at a handlebar position or be installed on other conspicuous places. When one loop generates a fusing fault, the state lamp in the loop is lightened. A cyclist sees the light and knows that the fuse in the loop has a fault so that the cyclist can determine a fault point.
Owner:TIANJIN YADI IND

Hydraulic system for cone crusher

The invention relates to a hydraulic system for a cone crusher. The hydraulic system for the cone crusher comprises an oil supplying system, a locking loop, an adjusting motor loop and an iron-encountering releasing and cleaning loop. The oil supplying system is composed of an oil tank, a motor and an oil pump. The locking loop is composed of a plunger cylinder and a fourth three-position-four-way valve. The adjusting motor loop is composed of a first oil motor, a second oil motor, a first three-position-four-way valve and a second three-position-four-way valve. The iron-encountering releasing and cleaning loop is composed of a third three-position-four-way valve, a locking oil cylinder and a releasing oil cylinder. Compared with the prior art, the hydraulic system for the cone crusher has the advantages that due to the fact that the condition that braking systems of the oil motors are braked by a brake is changed into the condition that the braking systems of the oil motors are controlled by hydraulic valves, the hydraulic system operation is more reliable; the hydraulic system control points are substantially reduced, and the fault occurrence rate is effectively decreased; by fully adopting domestic hydraulic elements, the price is low, and the maintenance is convenient; the electromagnet working conditions of solenoid valves are visually displayed through indicator lamps once a fault occurs, a fault point can be rapidly and accurately found, and the maintenance efficiency is improved.
Owner:LIAONING XINLONGJI HYDRAULIC LUBRICATION MACHINERY

Energy-saving-oriented self-energizing control method for car active suspension system

An energy-saving-oriented self-energizing control method for a car active suspension system, relates to the field of energy-saving control for car active suspension systems, and solves the problem about high energy consumption of the active suspension system. The method comprises the followings: as per performance indexes required by the active suspension system, designing a feedback controller of the active suspension system; based on the status of a motor and the charge-discharge condition of a power source, dividing the motor into three working areas; according to the self-energizing criterion, determining whether or not the active suspension system is capable of self energizing; if yes, computing to obtain the value of the pattern variable gamma, and determining the working area of the motor and the operating mode of the suspension according to the value of gamma; according to the operating mode of the suspension, designing corresponding operating circuit for each suspension mode, and according to the relationship between the variable resistance Rvar and the desired current i* in the circuit of the motor under each operating mode of the suspension system, switching to the corresponding operating circuit to realize switching among operating modes of the suspension system and changing of the current direction, thus realizing self-energizing control. The method disclosed in the invention is applicable to self-energizing control in other occasions.
Owner:严格集团股份有限公司

Double-speed motor controller and control method thereof

ActiveCN102361431ACan monitor healthWith lightning surge protectionAC motor controlCommunication interfaceRemote control
The invention discloses a double-speed motor controller and a control method thereof. The motor controller comprises a power supply connected with each circuit. The motor controller is characterized by consisting of a signal acquisition circuit, a microprocessor, a display circuit, a relay output circuit, a communication interface circuit, a transmitter circuit and a register; the signal acquisition circuit is connected with the display circuit, the relay output circuit, the communication interface circuit and the transmitter circuit through the microprocessor; the microprocessor is also connected with an online programming circuit and a memory; and the microprocessor is connected with an upper computer through the communication interface circuit to realize remote metering, remote control, remote regulation and remote communication of the double-speed motor controller. Because the structure and the method are adopted, the double-speed motor controller has the advantages that: three-phase current of a motor loop, voltage of one circuit and the like can be detected, the running state of the motor loop can be monitored at the same time, and fault protection such as thermal overload, blockage, three-phase current imbalance, over-voltage, under-voltage and the like are provided for the motor loop.
Owner:ANHUI ZHONGDIAN XINGFA & XINLONG TECH CO LTD

Control device and control method for vehicle compound braking system

The invention relates to a control device for a vehicle compound braking system. The control device comprises an electronic control unit, a resistance regulator and a motor controller, wherein the electronic control unit is used for controlling a pressure braking subsystem and a motor regenerative braking subsystem of the compound braking system; the resistance regulator is connected with a wheel hub motor loop of the motor regenerative braking subsystem; the motor controller is used for carrying out real-time control on a wheel hub motor and the resistance regulator; the electronic control unit is used for adjusting parameter values of a motor braking torque and transmitting a regulating command to the motor controller based on the variation of vehicle wheel speed and braking pressure so as to control the wheel hub motor and the resistance regulator, thus stable motor braking torque is kept when the braking pressure is at a first stage so as to realize stable recycle of electrical energy, while the motor braking torque linearly changes along with the braking pressure when the braking pressure is at a second stage, so that the motor regenerative braking subsystem is prevented from causing interference in the pressure braking subsystem. The invention further relates to a control method for the vehicle compound braking system.
Owner:BOSCH AUTOMOTIVE PROD SUZHOU

Self-generating limp system and method for hybrid electric vehicle

The invention discloses a self-generating limp system and method for a hybrid electric vehicle. The method comprises: setting electric appliance loads with the current fluctuation value larger than aset current fluctuation threshold value during opening / closing in whole vehicle loads to be R1, R2,..., Rn; when the 48V lithium battery has a fault, the lithium battery is charged, firstly, requesting an IBSG motor to enter an idle mode; then pre-charging and adjusting the idling speed of the engine are carried out; and after the voltage in the IBSG motor loop and the rotating speed of the IBSG motor meet the requirements, requesting the IBSG motor to enter a power generation mode to generate power, forbidding R1, R2,..., Rn to be switched on / off, and then converting the output voltage of theIBSG motor to charge the storage battery. According to the invention, after the 48V lithium battery breaks down and is disconnected, the IBSG motor can continue to generate power, and the situation that half-way feeding crouches down is avoided.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD

Electric automobile heat management system

The invention belongs to the technical field of automobile heat management, and relates to an electric automobile heat management system, which comprises a refrigerant loop, a battery loop, a warm air loop and a motor loop, wherein a refrigerant is arranged in the refrigerant loop, and cooling liquid is arranged in the battery loop, the warm air loop and the motor loop. According to the electric vehicle heat management system, through mutual correlation coupling of the refrigerant loop, the warm air loop, the battery loop and the motor loop, waste heat of the motor and the like is fully utilized, independent or mutual correlation operation of passenger compartment heat management, battery heat management and motor heat management in different functional scenes can be achieved, and the cooling and heating function requirements of the heat management system are met. The thermal management system is comprehensive in function scene, low in cost, simple in system and convenient to control.
Owner:SOUTH AIR INT

Recovered energy utilization system of excavator

The invention discloses a recovered energy utilization system of an excavator. The recovered energy utilization system is mainly composed of a pump-controlled fan motor loop, an energy-accumulator-controlled fan motor loop and an energy-accumulator-controlled drive motor loop. A hydraulic motor used for independent cooling is directly driven through recovered energy stored in an energy accumulator, no other links exist in the process, and the transmission efficiency is high. Meanwhile, the recovered energy is not coupled with a working oil cylinder or a motor, and the complete-machine control performance is not influenced. The energy-accumulator-controlled drive motor loop and the pump-controlled fan motor loop are designed, and when the environment temperature is low, independent cooling is not needed for excavator hydraulic oil or an engine cooling water system or when the energy of the energy accumulator cannot meet the energy requirement of an independent cooling system. According to the system, the energy-accumulator-controlled fan motor loop can be turned off and switched to the energy-accumulator-controlled drive motor loop, or the energy-accumulator-controlled drive motor loop can be turned off and switched to the pump-controlled fan motor loop. In this way, the recovered energy can be efficiently utilized, and reliable work of the independent cooling system is also ensured.
Owner:XCMG EXCAVATOR MACHINERY

Low-voltage motor protection method and device thereof

InactiveCN101752836AWon't burn foreverCut off safe and reliableEmergency protective circuit arrangementsLow voltageMotor loop
The invention relates to low-voltage motor protection method and device thereof. The invention relates to a low-voltage motor loop which comprises a circuit breaker and a contactor, wherein the output end of the contactor is connected with the input end of the circuit breaker, and the circuit breaker and the contactor are both connected with the low-voltage motor loop through a microprocessor module, the output end of a current signal detection module is connected with the input end of the microprocessor module, the output end of the microprocessor module is connected with the input end of an action execution module, and the output end of the action execution module is respectively connected with the input ends of the circuit breaker and the contactor. During the operation, the current signal detection module detects electric current in the low-voltage motor loop, and a detection result is transmitted into the microprocessor module for being analyzed and calculated, and the microprocessor module sends an action instruction to the execution module to control the contactor or switch off the circuit breaker. Therefore, the execution of the contactor or the circuit breaker is selected correctly by comparing the electric current acquired by the microprocessor module with the disjunction of the contactor, and consequently, the switching-off when the failure occurs is safer and more reliable.
Owner:SUZHOU WANLONG ELECTRIC GROUP

Protection circuit, drive control system and control method of drive control system

The invention discloses a protection circuit. The protection circuit comprises a single-chip microcomputer and an mos tube module assembly, and the mos tube module assembly comprises an mos tube and an mos tube driving module electrically connected with the mos. The single-chip microcomputer is electrically connected with the mos tube driving module to output a control instruction; the mos tube module assembly detects the voltage of itself, and sends the voltage to the single-chip microcomputer for sampling; and the single-chip microcomputer determines the voltage, and then outputs the control instruction to the mos driving module to control ON / OFF of the mos tube, thereby protecting circuit components in serial connection with the mos tube module assembly. Thus, a relay can be automatically disconnected from the ground even if a motor loop is shorted, and a fuse and a control module are prevented from burnout if a motor wire harness makes contact with or is wound with a battery wire harness.
Owner:HELLA SHANGHAI ELECTRONICS

Power integral protection circuit of lithium battery charge drill

The invention relates to the technical field of power supply circuits, in particular relates to a power integral protection circuit of a lithium battery charge drill, which comprises a battery, a driving circuit module, a control switch, a microprocessor and a motor, wherein the battery, the driving circuit module, the control switch and the motor are electrically connected sequentially, the driving circuit module is connected with the microprocessor, the battery is respectively connected with the control switch and the microprocessor, and the control switch is connected with the input end of the microprocessor. The power integral protection circuit has a simple and scientific structure design; under the condition that the current passing through the motor is not controlled, the maximum time that the charge drill can work when being clamped is calculated, the motor is protected through turning off a motor loop; and meanwhile the maximum motor working capacity and the long product service life are achieved.
Owner:东莞市妙达电动工具制造有限公司

Oil boom laying robot and hydraulic system of support equipment thereof, and control method thereof

The invention discloses an oil boom laying robot and a hydraulic system of support equipment thereof, and a control method thereof. The oil boom laying robot and the hydraulic system of the support equipment thereof comprise a safety overflow valve, an electromagnetic proportional reversing valve, a double-hydraulic control check valve, a hydraulic valve, a throttle valve, a sequence valve, a hydraulic motor and a hydraulic cylinder. The oil boom laying robot and the hydraulic system of the support equipment thereof comprise a robot body translating loop, a robot body swinging loop, an oil-sweeping arm stretching and retracting loop, a derricking oil cylinder loop, an oil boom buoy motor loop and a nozzle and buoy sequential acting loop which control translation of a robot body, swinging of the robot body and a robot oil-sweeping arm, stretching, retracting and luffing of the oil-sweeping arm, rotation of an oil boom buoy and the oil boom buoy gripping and inflating actions respectively. The oil boom laying robot can accurately lock or position the hydraulic cylinder or the hydraulic motor; through application of an electro-hydraulic proportional control technology to the hydraulic system, precise and automated control over a hydraulic component is achieved.
Owner:SHANDONG UNIV OF SCI & TECH
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