141results about How to "Improve drive characteristics" patented technology

The invention relates to a front wheel and rear wheel drive steering control system of an automobile in the technical field of automobile engineering. Steering wheel steering angle sensors are respectively connected with a drive turning electronic control unit; one end of each steering wheel steering angle sensor is connected with a steering wheel, and the other end of each steering wheel steering angle sensor is connected with a front wheel steering motor servo control unit; the front wheel steering motor servo control unit is respectively connected with a front wheel steering angle displacement sensor and a front wheel steering execution mechanism; a rear wheel steering motor servo control unit is respectively connected with a rear wheel steering angle displacement sensor and a rear wheel steering execution mechanism; the front wheel steering execution mechanism is connected with a front wheel, and the rear wheel steering execution mechanism is connected with a rear wheel. The invention combines front wheel drive steering and rear wheel drive steering, improves the lateral dynamic performance of the automobile, the driving characteristics of a driver and the operating stability of the automobile, changes a steering angle of the front wheel and the rear wheel in real time according to the drive working condition and a running parameter of the automobile and ensures that the automobile response follows the output response of a reference automobile model.

A vehicular drive assist system that analyzes information collected from a vehicle and sends a result of analysis to the vehicle and / or another vehicle, including a vehicle-mounted apparatus (101) mounted in the vehicle, and a communication center (102) that communicates with the vehicle-mounted apparatus (101). The vehicle-mounted apparatus (101) detects a present position of the host vehicle, detects a vehicular state of the host vehicle, and sends the present position and the vehicular state at the position detected to the communication center (102). The communication center (102) performs statistic processing of the vehicular state received, separately for each predetermined area on a road, by using the present position, calculates a tendency of the vehicular state separately for each predetermined area, evaluates ease of travel on the road in the predetermined area from the tendency calculated, and sends a result of evaluation to the vehicle and / or another vehicle.

A loudspeaker comprising a first magnet; a second magnet arranged to surround the first magnet; a yoke for connecting the first magnet and the second magnet; a first voice coil; a second voice coil; a first vibrating membrane of the voice coil; a second vibrating membrane disposed opposite to the first vibrating membrane with respect to the first magnet and connected to the second voice coil; a first vibrating membrane disposed between the first vibrating membrane and the first magnet a magnetic plate; and a second magnetic plate disposed between the second diaphragm and the second magnet, wherein the first voice coil is disposed in the first magnetic gap between the first magnetic plate and the yoke, and the second voice coil is disposed in the second magnetic gap between the second magnetic plate and the yoke.

A superior reflex type vertically-aligned liquid crystal display device wherein the refractive index anisotropy Deltan of its liquid crystal material is controlled to be more than 0.1, and the transmissivity of the liquid crystal is saturated with facility at a low voltage below 5 to 6V despite a reduction of the thickness of the vertically-aligned liquid crystal layer to less than 2 mum, hence achieving satisfactory driving at a practically low voltage while attaining another advantage of remarkable improvement in the transmissivity itself. Therefore, the display device indicates a sufficient transmissivity, an excellent low-voltage driving characteristic and a fast response. Further improvements are realizable in a display apparatus, a projection optical system and a projection display system by the use of such display device.

An optical device includes a lens holder that holds a lens and is movable in the optical-axis direction of the lens, and an actuator that moves the lens holder in the optical-axis direction. The actuator includes an actuator element composed of an electroactive polymer, an actuator-element holder that holds the actuator element, a mechanism that applies prestrain to the actuator element, and a connecting member that connects the lens holder and the actuator. Herein, a connecting portion of the connecting member is disposed adjacent to the side surface of the actuator.

The invention relates to a driving motor of an electric vehicle, in particular to a motor of an electric bicycle and an electric motor cycle which can realize automatic stepless speed change. The driving motor is characterized in that a permanent brushless speed-changing motor consists of a motor, a centrifugal rotating speed sensing magnetic adjusting mechanism and a speed reducer; one end of a motor shaft is connected with a flux shunt 2 which rotates with a rotor, and a spring is arranged between the flux shut 2 and the rotor; the other end of the motor shaft is connected with a thrust disc 10 which is a conical surface round disc; a plurality of wedge-shaped spaces distributed radially are formed between the inner surface of the round disc and a bracket 8; the middle part is placed with a centrifugal roller 9; and the motor shaft 1, the rotor bracket 8, the centrifugal roller 9 and the thrust disc 10 form a centrifugal mechanism. Compared with the prior art and mechanical shift-changing regulation, the driving motor adopts continuous stepless speed regulation, has higher efficiency than that of the mechanical CVT stepless regulation (the efficiency of 60 percent to 70 percent)by more than 20 percent, and is more suitable for the common hidden board type rotor compared with the electric control weak magnetism ratio. The basic method is as follows: a flux shut mechanism is added in the motor so as to achieve the purpose of increasing the speed by weak magnetism and realize ideal driving characteristic. Due to simple mechanism and reliable working, the driving motor has very wide application prospect.

The invention relates to a Mn-Zn soft magnetic ferrite for saving energy and lighting, and preparation method of an obtained magnetic core. The soft magnetic ferrite comprises the following main components by molar part: 50.5-55.5 mol% of iron oxide Fe2O3, 34.5-38.3mol% of manganese oxide Mn3O4 and the balance of zinc oxide basically, and also comprises two groups of auxiliary materials A and B, wherein the auxiliary material group A comprises one or two of CaCO3 and SiO2 with the weight percentage of 50-500ppm, and the auxiliary material group B comprises one or more of Bi2O3, Nb2O5, V2O5 and Al2O3 with the weight percentage of 100-2000ppm. The magnetic core obtained from the material has high squareness ratio under the high and low temperature conditions, and simultaneously, the permeability temperature curve has negative temperature coefficient from minus 10 DEG C to 120 DEG C, and the driving characteristics are good under the situations of high and low temperature.

The invention relates to a rotor (10) for a reluctance motor, wherein the rotor (10) has a laminate stack (14) having layers (16), each of which has a plurality of flux-conducting sections (24) formed in each case by a magnetically conductive rotor lamination (18) and extending transversely to a corresponding q axis (30), wherein the flux-conducting sections (24) are separated from one another by nonmagnetic flux barrier regions (22). The invention is based on the problem of providing the rotor (10) with a runup aid. For this purpose, an electrically conductive and non-ferromagnetic filler material is arranged in a plurality or all of the flux barrier regions (22) of the layers (16), by means of which filler material the flux barrier regions (22) of adjacent layers are electrically connected to one another so that cage bars (34) of a rotor cage of the rotor (10) which extend axially parallel or skewed with respect to the axis of rotation (A) are formed by the filler material in the flux barrier regions (22).

The present invention provides a thin-film transistor structure, which comprises a substrate, a first metal layer, a first buffer layer, a semiconductor layer, a second metal layer, a second buffer layer, and a third metal layer. The second metal layer includes a gap region; the semiconductor layer includes a channel region. The present invention uses the first and third metal layers to form double gates. By controlling the channel region using the double-gate structure, the turn-on current of the thin-film transistor can be enhanced and thus achieving the efficacy of improving the driving efficiency of the device.

The invention provides a voltage converting unit including a converting module part, a temperature compensating part, a first gate driving signal generating part and a second gate driving signal generating part, whereby an image display quality is improved. The converting module part generates a gate driving pulse based on an externally provided voltage. The temperature compensating part generates a reference voltage based on a primary reference voltage with respect to a temperature. The first gate driving signal generating part generates a first gate driving signal based on the gate driving pulse and the reference voltage. The second gate driving signal generating part generates a second gate driving signal based on the gate driving pulse and a ground voltage.

A modernization method for converting a hydraulically actuated elevator system into an elevator system driven by a drive machine having a drive sheave makes it possible to convert and retain some essential elements of the existing elevator system. Car support rollers are arranged beneath an underside of an elevator car in the area of points of the underside of the elevator car located opposite each other and are connected to the elevator car. Furthermore, a support is guided along the underside of the elevator car and about the car support rollers. The support is also guided about the drive sheave so that the support can be driven by the drive sheave of the drive machine in order to raise and lower the elevator car.