34results about How to "Small control current" patented technology

The present invention relates to a battery system having a battery which is designed to supply a high-voltage power system and can be connected by at least one of its high-voltage power system terminals via a contactor (10), which battery system comprises a control coil (20), and closes in one state in which a control current flows through the control coil, and opens in a further state in which no current flows through the control coil. In this context, in order to generate the control current, the control coil can be connected via a supply circuit (80) to a supply unit (50) by means of which a predetermined voltage can be made available which is lower than the voltage generated by the battery. In addition, the contactor or the supply circuit comprises an energy accumulator (90) which can be charged with a predetermined quantity of electrical energy by means of the supply unit which is connected to the control coil and makes available the predetermined voltage, and in the event of the predetermined voltage being lost, said energy accumulator can continue to generate the control current flowing through the control coil for a first time by outputting the charged quantity of energy.

The invention provides an electromagnetic levitation train track system, which is characterized in that tracks are arranged on two sides of a roadbed or a track beam, a magnetic levitation train runson the tracks, traction guide electromagnets are horizontally arranged on supporting arms on two sides of the magnetic levitation train, linear motor stators are horizontally arranged at opposite positions on the tracks, the linear motor stator and the traction guide electromagnet are horizontally arranged in the magnetic pole direction, an iron core linear motor is formed by the linear motor stator and the traction guide electromagnet at a certain magnetic gap, and an E-shaped section suspension electromagnet and a gap sensor are arranged at the bottom of the magnetic levitation train and suspended below an armature plate horizontally arranged at the bottoms of the tracks. According to the invention, the control system controls the current and direction of the traction guide electromagnetand the linear motor stator coil, and controls the horizontal guide and suspension force and the traction force and direction, so that the magnetic levitation train flies in the air.

The invention discloses a Halbach array deflecting lorentz force magnetic bearing with two degrees of freedom, which comprises a rotor system and a stator system, wherein the rotor system mainly comprises an outer flux sleeve, an outer flux-insulating ring, an outer upper Halbach array magnetic steel, an outer lower Halbach array magnetic steel, an outer upper paramagnetic sleeve, an outer lower paramagnetic sleeve, an outer upper magnetic steel nut, an outer lower magnetic steel nut, a turntable, an outer component nut, an inner flux sleeve, an inner flux-insulating ring, an inner upper Halbach array magnetic steel, an inner lower Halbach array magnetic steel, an inner upper paramagnetic sleeve, an inner lower paramagnetic sleeve, an inner upper magnetic steel nut, an inner lower magnetic steel nut and an inner component nut; the stator system mainly comprises a stator framework, an aluminum substrate, a winding and an epoxy resin glue. According to the Halbach array deflecting lorentz force magnetic bearing, the Halbach array magnetic steel structure is adopted, so that the air-gap field strength is enhanced, the bearing capacity and rigidity of the magnetic bearing are increased, the output of large-top control torque is benefited, the paramagnetic sleeve is utilized to eliminate the flux density fluctuation caused by the splicing gap of the magnetic steel, the flux density uniformity in air gap is promoted and the precision of output torque is increased.

The invention discloses an energy-saving bypass device for illumination. The energy-saving bypass device comprises a power supply [1], a controller [2], a bypass drive unit [3], a relay [4], a contactor [5], a bypass contact [6], a voltage regulating drive [7], a transformer [8], a voltage regulating unit [9], a bypass indication [10], an AC input [11], an AC output [12] and an AC common port [13], wherein the contactor [5] is electrically connected with the relay [4], the bypass contact [6], the voltage regulating unit [9], the bypass indication [10], the AC input [11] and the AC common port [13]; and the transformer [8] is electrically connected with the bypass contact [6], the voltage regulating unit [9], the AC input [11] and the AC output [12]. Bypass control is carried out on a high-voltage side of the transformer, so that the control current is relatively low; and required electric elements are small in size and low in cost.

The invention discloses a vehicle. The vehicle comprises a chassis and a packing case. The packing case is hinged to the chassis. An awning mechanism for shielding the packing box is installed on the packing case. The vehicle comprises an awning mechanism hydraulic oil path, a hydraulic pump, a first reversing valve and a hydraulic motor are arranged in the awning mechanism hydraulic oil path, the first reversing valve is arranged in an oil path between the hydraulic pump and the hydraulic motor, and the hydraulic motor is connected with the awning mechanism. According to the vehicle, the hydraulic motor drives the awning mechanism to be closed and opened, due to the high power of the hydraulic motor, larger traction force is achieved through large torque of the hydraulic motor, and the hydraulic motor drives the awning mechanism to achieve soil scraping and leveling functions. A pressure sensor is arranged in the hydraulic oil path of the awning mechanism, the running resistance of the awning mechanism is automatically recognized, the vehicle automatically retreats after encountering a large obstacle, and the running awning mechanism is protected.

The present invention discloses a method, an apparatus, an optical component and an optical network system for controlling an operating temperature of an optical component. The method includes: acquiring an external ambient temperature of the optical component; setting a target control temperature of a temperature controller according to the external ambient temperature, where the target control temperature is a function value of the external ambient temperature, and the target control temperature is within a range from an operating temperature lower limit of a laser to an operating temperature upper limit of the laser; and controlling, according to the target control temperature, an operating temperature of the optical component by means of heating or cooling by using the temperature controller.

The invention discloses a semi-active suspension device of an engine and belongs to the field of automobile parts. The semi-active suspension device is characterized in that an instrument information collecting system (1) is connected with an automobile instrument circuit and is used for collecting automobile tachometer circuit current signals (8), an analog-digital converter converts the current signals (8) into digital signals (9), a single chip microcomputer (3) processes the digital signals (9) and outputs control signals (10), the analog-digital converter (5) converts the control signals (10) into currents, a current amplifier (6) amplifies currents, and amplified currents (11) go through a resistance wire in a viscous damper (7) to cause the temperature in the damper to change so as to change the viscosity of naphthenic oil (16) filled into the viscous damper (7), so that damping force (13) embodied on the suspension device changes. The semi-active suspension device of the engine judges the operation station of the engine according to collected engine rotating speed information so as to output control currents to change suspension damping force to meet the damping requirements on the broadband operating condition.

A dynamic balance method for a magnetic suspension molecular pump is provided. After a motor of the magnetic suspension molecular pump is started, a force freedom imbalance vibration control module is started. If imbalance mass on a rotor enables the maximum radial amplitude of the rotor in speed accelerating process not to be one second larger than a protective gap under the control of the force freedom imbalance vibration control module, the imbalance vibration control module can inhabit same frequency vibration of the rotor and enable the speed of the rotor to be quickly larger than rigid critical speed of the rotor, thereby performing dynamic balance operation on the rotor of the magnetic suspension molecular pump at superhigh speed. The dynamic balance method for the magnetic suspension molecular pump can directly perform dynamic balance operation on the rotor of the magnetic suspension molecular pump at superhigh speed, and has simple procedures and high efficiency.

The invention discloses a compliance adjusting method for a suspension clearance and control current of an electromagnetic magnetic suspension train. The invention induces a set point adjustor for a working point in a magnetic suspension control unit; the set point adjustor for the working point is internally provided with a control curve function; an input value is calculated according to the control curve function and then is output; the control curve function is designed by a specific method which can reduce the suspension clearance and simultaneously increase the control current when the suspension weight is increased, and the specific method can increase the suspension clearance and simultaneously reduce the control current when the suspension weight is reduced; but a total suspension force can just balance the weight of a suspension body and the suspension clearance can be monotonously changed with the change of the control current; therefore, the method of the invention can be more flexibly compromised on optimizing requirements so as to achieve a better property index.

Embodiments of the present invention provide an excavator control method, device and excavator, and relate to the field of engineering control. The method includes obtaining the temperature of the hydraulic oil of the excavator and the oil return pressure of the breaker; when the temperature is greater than a preset temperature value, increasing the control current of the cooling pump; , reduce the control current of the main pump. Increasing the control current of the cooling pump can increase the output power of the cooling pump and improve the cooling efficiency of the hydraulic oil, thereby rapidly reducing the temperature of the hydraulic oil, thus ensuring the normal operation of the breaker and avoiding the decrease in the efficiency of the hydraulic system of the excavator. Reducing the control current of the main pump can reduce the output power of the main pump and the oil inlet flow of the breaker, thereby reducing the oil return pressure of the breaker, thus avoiding damage to the filter element of the breaker due to excessive oil return pressure and prolonging the excavator. The service life of the breaker.

The invention relates to an integrated electronic hydraulic braking system capable of actively switching driving styles, and aims at solving the problems of poorer integrated level, complicated structure and failure of achieving the continuous adjustment of boost ratio according to driving styles of a current electronic hydraulic braking system. The system comprises a housing, a first motor, a second motor, a boost motor, a braking main cylinder, a driving wheel, a driven wheel, a transmission belt, a braking pedal push rod, first transmission pairs, second transmission pairs, third transmission pairs, an electric control unit (ECU), a hydraulic control unit (HCU) and a pedal travel sensor, wherein the first motor, the second motor, the boost motor, the braking main cylinder, the electriccontrol unit (ECU) and the hydraulic control unit (HCU) are arranged on the housing. By means of the integrated electronic hydraulic braking system, the continuous adjustment of braking boost ratio isachieved, the boost ratios with any magnitudes can be selected according to the wills of drivers, the free switching of the driving styles is completed, and the system is conformed to the developingtendency of driving style customization in a current intelligent driving technology.