9725 results about "Electric drive" patented technology

The invention discloses an electric anastomat for a surgical department, comprising an osculating part and a driving device for driving an execution mechanism, wherein the osculating part is provided with a nail supporting seat, a nail bin and the execution mechanism; the driving device is an electric driving device which comprises a power supply, a control panel, a closed driving unit and a percussion driving unit; the closed driving unit consists of a closed motor and a closed driving mechanism; the input end of the closed driving mechanism is connected with the closed motor; the output end of the closed driving mechanism is connected with the execution mechanism of the osculating part; the percussion driving unit consists of a percussion motor and a percussion driving mechanism; the input end of the percussion driving mechanism is connected with the percussion motor; the output end of the percussion driving mechanism is connected with the execution mechanism of the osculating part; the closed motor and the percussion motor are respectively connected with the control panel through leads; and the control panel is connected with the power supply through a lead. According to the electric anastomat disclosed by the invention, the quality of an operation can be improved, the operation difficulty of doctors is reduced and the automatic operation can be realized.

A method of remotely updating control software in a heavy-duty vehicle having at least one programmed controller including securing the heavy-duty vehicle; determining that the vehicle is secured; establishing a wireless connection with the heavy-duty vehicle; downloading an updated control software; and updating the heavy-duty vehicle's control software with the updated control software in response to the determining that the vehicle is secured.

A fuel management control method for a hybrid electric vehicle drive having an internal combustion engine and an electric motor arranged in parallel such that both can propel the vehicle; the system including an electric motor driven fuel pump and a programmable microprocessor; and wherein the method further includes monitoring vehicle speed and sensing braking pressure and directing signals of both vehicle speed and braking to the microprocessor and processing such inputs in accordance with an aggressive fuel management program including shut-off of fuel flow to the gas engine in response to vehicle braking at vehicle speeds above a predetermined maximum hysteresis speed and maintaining the fuel shut off during vehicle coasting above a predetermined speed while controlling the electric motor to provide regenerative braking or vehicle start during such fuel shut off modes of operation.

One embodiment of an electric drive system includes first and second gear assemblies coupled to a hollow axle tube, and first and second electric motors respectively coupled to the first and second gear assemblies. Further, the electric drive system includes first and second drive axles positioned within the hollow axle tube. The first drive axle includes a first end portion coupled to a first wheel and a second end portion coupled to the first gear assembly. Similarly, the second drive axle includes a first end portion coupled to a second wheel spaced-apart from the first wheel and a second end portion coupled to the second gear assembly. Actuation of the first electric motor rotates the first drive axle and first wheel via the first gear assembly and actuation of the second electric motor rotates the second drive axle and second wheel via the second gear assembly.

A propulsion energy storage control system and method of control interspersed between a heavy duty hybrid-electric drive system and its propulsion energy storage. The control system having an energy storage DC bus, electrical interfaces to the drive system and a plurality of propulsion energy storage subsystems, DC-to-DC converters at each interface, and a controller configured to operate each DC-to-DC converter independently such that power flow may charge, discharge, and shuttle between the plurality of propulsion energy storage subsystems.

Strategies other than immediate elimination of regenerative braking (FIG. 2) are invoked when an incipient wheel lock-up is detected, the ABS becomes active, and/or incipient wheel slip is detected. The strategies include: reducing the regenerative braking torque as a function of the coefficient of friction of a surface on which the vehicle is traveling (FIG. 3); and adjusting regenerative braking in relation to the rate at which wheel slip is changing (FIG. 4). Some of the strategies may be applied on an individual wheel basis (FIG. 5), and some of the strategies may be applied in conjunction with operating friction brakes of the vehicle to apply at least some of the reduction in regenerative braking torque as friction brake torque (FIG. 1).

An electric driven hydraulic fracking system is disclosed. A pump configuration includes the single VFD, the single shaft electric motor, and the single hydraulic pump mounted on the single pump trailer. A controller associated with the single VFD and is mounted on the single pump trailer. The controller monitors operation parameters associated with an operation of the electric driven hydraulic fracking system as each component of the electric driven hydraulic fracking system operates to determine whether the operation parameters deviate beyond a corresponding operation parameter threshold. Each of the operation parameters provides an indicator as to an operation status of a corresponding component of the electric driven hydraulic fracking system. The controller initiates corrected actions when each operation parameter deviates beyond the corresponding operation threshold. Initiating the corrected actions when each operation parameter deviates beyond the corresponding operation threshold maintains the operation of the electric driven hydraulic fracking system.

An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. The single VFD converts the electric power of at least 13.8 kV to a VFD rated voltage level of at least 4160V and drives the single shaft electric motor at the VFD voltage level of up to 4160V to control the operation of the single shaft electric motor and the single hydraulic pump. The single shaft electric motor drives the single hydraulic pump with the rotation at the rated RPM level of at least 750 RPM. The single hydraulic pump continuously pumps the fracking media into the well at the HP level of at least 5000 HP. The single hydraulic pump operates on a continuous duty cycle to continuously pump the fracking media at the HP level of at least 5000 HP.

The invention discloses an electric driving fracturing type power supplying semitrailer. The electric driving fracturing type power supplying semitrailer is characterized in that a high-voltage switch, a transformer and two rectifying unit sets are adopted to correspondingly drive a plurality of high-voltage converting units and a plurality of low-voltage converting units through common DC buses.The whole electric driving fracturing type power supplying semitrailer is small in size, compact in arrangement, and economic; the common high-voltage switch, the transformer and the rectifying unitsare adopted, so that the wiring of power supplying circuits can be reduced; the equipment quantity and investment output power can be decreased; and the use demand can be met.

System and method for non-invasive lysis of sub-dermal tissue by means of focused ultrasonic energy, the system comprising: a source of ultrasonic energy adapted to operate in continuous wave mode and to focus ultrasonic energy in a focal zone within the sub-dermal tissue, the ultrasonic energy being adapted to induce tissue cavitation in the focal zone; means for continuous displacement of the source over the skin surface; and means for determining a safe speed for the displacement, the safe speed allowing to avoid thermal tissue damage. The source of ultrasonic energy is accommodated in a hand-held applicator including a wheeled traction system powered by an electric drive.

The invention discloses an electric drive fracturing semi-trailer of a frequency conversion integrated machine. The optimization and integration of the traditional power supply semi-trailer and the fracturing semi-trailer realize the functions of power supply and fracturing of one semi-trailer without using the complete set of the power supply semi-trailer and the fracturing semi-trailer, the electric drive fracturing semi-trailer is more flexible in actual use, and the well field layout of oil and gas fields is greatly optimized; the transportation is convenient; only a set of high-voltage cables can be connected with the high-voltage power supply to reach a working state, and the wiring installation is faster; compared with diesel-driven fracturing, and the noise of the electric drive fracturing is low without exhaust emission pollution; the driving source is power, which has lower cost than the diesel; the electric drive fracturing semi-trailer adopts an integrated design of a motorand a frequency converter (namely, the frequency conversion integrated machine), the space occupied by the electric motor and the inverter in the prior art is reduced effectively, so the installing part of the electric drive fracturing semi-trailer has smaller volume and the transportation is more convenient, and can also provide space guarantee for installing other equipment on the semi-trailerbody.

The invention discloses a fracturing well site layout system. The fracturing well site layout system comprises a gas source, a processing device, a power supply system, a power distribution system, anelectric drive fracturing device, an electric drive sand mixing device, a sand supply device, a liquid supply device, an instrument device and a high-low pressure manifold, wherein the gas source provides fuel needed by power generation for the power supply system after being processed by the processing device; the power supply system drives the electric drive fracturing device and the electric drive sand mixing device through the power distribution system; the sand supply device provides fracturing sand needed by mixing for the electric drive sand mixing device; the liquid supply device provides needed liquid for the electric drive sand mixing device; the output end of the electric drive sand mixing device is connected with the electric drive fracturing device through the high-low pressure manifold; the electric drive fracturing device communicates with a well mouth through the high-low pressure manifold; and the instrument device is used for remotely controlling the electric drive fracturing device and the electric drive sand mixing device. The fracturing well site layout system has the beneficial effects that the occupied area is smaller, the output power of the single electricdrive fracturing device is larger, wiring of the whole well site layout is simpler, the wiring time is shorter, and application is more flexible.

An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. A pump configuration includes a single VFD configuration, the single shaft electric motor, and the single shaft hydraulic pump mounted on the single pump trailer. The single VFD configuration converts the electric power at the power generation voltage level distributed from the power distribution trailer to a VFD voltage level and drives the single shaft electric motor to control the operation of the single shaft electric motor and the single hydraulic pump. The VFD voltage level is a voltage level that is required to drive the single shaft electric motor. The VFD configuration also controls operation of the auxiliary systems based on the electric power at the auxiliary voltage level.

A method of controlling a hybrid drive train of a vehicle having, in series, an internal combustion engine, a clutch, an electric motor and a transmission with an output connected to the drive axle. During traction operation, the vehicle changes from an electric driving mode into a combination driving mode or a combustion engine driving mode, in that the clutch is engaged and the combustion engine torque is temporarily increased. The method includes regulating engagement of the clutch at least until reaching a starting rotational speed of the combustion engine such that the acceleration of the combustion engine occurs according to a predetermined progression of rotational speed and that the torque of the combustion engine is increased by the same amount as the transferable torque of the clutch is increased by the engagement process.